11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 61da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 91da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 101da177e4SLinus Torvalds * are met: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 131da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 141da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 161da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 171da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 181da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 191da177e4SLinus Torvalds * from this software without specific prior written permission. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 221da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 231da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 241da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 261da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 271da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 281da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 291da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 301da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 311da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 321da177e4SLinus Torvalds * 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 35aceaf78dSDave Hansen #include <linux/file.h> 36b89f4321SArnd Bergmann #include <linux/fs.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4017456804SBryan Schumaker #include <linux/pagemap.h> 417df302f7SChuck Lever #include <linux/ratelimit.h> 4268e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 43363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 449a74af21SBoaz Harrosh #include "xdr4.h" 450a3adadeSJ. Bruce Fields #include "vfs.h" 46bfa4b365SJ. Bruce Fields #include "current_stateid.h" 4799dbb8feSJ. Bruce Fields #include "fault_inject.h" 481da177e4SLinus Torvalds 495e1533c7SStanislav Kinsbursky #include "netns.h" 505e1533c7SStanislav Kinsbursky 511da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds /* Globals */ 54cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 55efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 56f32f3c2dSJ. Bruce Fields 57f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 58f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 59f32f3c2dSJ. Bruce Fields .si_generation = ~0, 60f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 61f32f3c2dSJ. Bruce Fields }; 62f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 63f32f3c2dSJ. Bruce Fields /* all fields zero */ 64f32f3c2dSJ. Bruce Fields }; 6519ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6619ff0f28STigran Mkrtchyan .si_generation = 1, 6719ff0f28STigran Mkrtchyan }; 68f32f3c2dSJ. Bruce Fields 69ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 70fd39ca9aSNeilBrown 71f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 72f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 7319ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds /* forward declarations */ 76fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 771da177e4SLinus Torvalds 788b671b80SJ. Bruce Fields /* Locking: */ 798b671b80SJ. Bruce Fields 808b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 81353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 821da177e4SLinus Torvalds 838b671b80SJ. Bruce Fields /* 848b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 858b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 868b671b80SJ. Bruce Fields * eventually cover more: 878b671b80SJ. Bruce Fields */ 888b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 898b671b80SJ. Bruce Fields 90fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 91fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 92e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 93e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 94e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 95e60d4398SNeilBrown 961da177e4SLinus Torvalds void 971da177e4SLinus Torvalds nfs4_lock_state(void) 981da177e4SLinus Torvalds { 99353ab6e9SIngo Molnar mutex_lock(&client_mutex); 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds 102508dc6e1SBenny Halevy static void free_session(struct kref *); 103508dc6e1SBenny Halevy 104508dc6e1SBenny Halevy /* Must be called under the client_lock */ 105508dc6e1SBenny Halevy static void nfsd4_put_session_locked(struct nfsd4_session *ses) 106508dc6e1SBenny Halevy { 107508dc6e1SBenny Halevy kref_put(&ses->se_ref, free_session); 108508dc6e1SBenny Halevy } 109508dc6e1SBenny Halevy 110508dc6e1SBenny Halevy static void nfsd4_get_session(struct nfsd4_session *ses) 111508dc6e1SBenny Halevy { 112508dc6e1SBenny Halevy kref_get(&ses->se_ref); 113508dc6e1SBenny Halevy } 114508dc6e1SBenny Halevy 1151da177e4SLinus Torvalds void 1161da177e4SLinus Torvalds nfs4_unlock_state(void) 1171da177e4SLinus Torvalds { 118353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds static inline u32 1221da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds u32 x = 0; 1271da177e4SLinus Torvalds while (nbytes--) { 1281da177e4SLinus Torvalds x *= 37; 1291da177e4SLinus Torvalds x += *cptr++; 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds return x; 1321da177e4SLinus Torvalds } 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds static struct list_head del_recall_lru; 1351da177e4SLinus Torvalds 13632513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 13732513b40SJ. Bruce Fields { 13832513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 13932513b40SJ. Bruce Fields } 14032513b40SJ. Bruce Fields 14113cd2184SNeilBrown static inline void 14213cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14313cd2184SNeilBrown { 1448b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1458b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1468b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1478b671b80SJ. Bruce Fields iput(fi->fi_inode); 14832513b40SJ. Bruce Fields nfsd4_free_file(fi); 1498b671b80SJ. Bruce Fields } 15013cd2184SNeilBrown } 15113cd2184SNeilBrown 15213cd2184SNeilBrown static inline void 15313cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 15413cd2184SNeilBrown { 1558b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 15613cd2184SNeilBrown } 15713cd2184SNeilBrown 158ef0f3390SNeilBrown static int num_delegations; 159c2f1a551SMeelap Shah unsigned int max_delegations; 160ef0f3390SNeilBrown 161ef0f3390SNeilBrown /* 162ef0f3390SNeilBrown * Open owner state (share locks) 163ef0f3390SNeilBrown */ 164ef0f3390SNeilBrown 16516bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 16616bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 16716bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 16816bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 169ef0f3390SNeilBrown 17016bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 171ddc04c41SJ. Bruce Fields { 172ddc04c41SJ. Bruce Fields unsigned int ret; 173ddc04c41SJ. Bruce Fields 174ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 175ddc04c41SJ. Bruce Fields ret += clientid; 17616bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 177ddc04c41SJ. Bruce Fields } 178ef0f3390SNeilBrown 179ef0f3390SNeilBrown /* hash table for nfs4_file */ 180ef0f3390SNeilBrown #define FILE_HASH_BITS 8 181ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 18235079582SShan Wei 183ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 184ddc04c41SJ. Bruce Fields { 185ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 186ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 187ddc04c41SJ. Bruce Fields } 188ddc04c41SJ. Bruce Fields 189ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 190ef0f3390SNeilBrown 191998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 192f9d7562fSJ. Bruce Fields { 193f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 194f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 195f9d7562fSJ. Bruce Fields } 196f9d7562fSJ. Bruce Fields 197998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 198998db52cSJ. Bruce Fields { 199998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 200998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 201998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 202998db52cSJ. Bruce Fields } else 203998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 204998db52cSJ. Bruce Fields } 205998db52cSJ. Bruce Fields 206998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 207f9d7562fSJ. Bruce Fields { 208f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 209f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 210f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 211f9d7562fSJ. Bruce Fields } 212f9d7562fSJ. Bruce Fields } 213f9d7562fSJ. Bruce Fields 214998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 215f9d7562fSJ. Bruce Fields { 216f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 217f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 2183d02fa29SJ. Bruce Fields /* 2193d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 2203d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 2213d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 2223d02fa29SJ. Bruce Fields */ 2233d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 2243d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 2253d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 226f9d7562fSJ. Bruce Fields } 227f9d7562fSJ. Bruce Fields } 228f9d7562fSJ. Bruce Fields 229998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 230998db52cSJ. Bruce Fields { 231998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 232998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 233998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 234998db52cSJ. Bruce Fields } else 235998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 236998db52cSJ. Bruce Fields } 237998db52cSJ. Bruce Fields 2386136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 23936d44c60SJ. Bruce Fields { 2406136d2b4SJ. Bruce Fields static int min_stateid = 0; 24138c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2426136d2b4SJ. Bruce Fields int new_stid; 2436136d2b4SJ. Bruce Fields int error; 24436d44c60SJ. Bruce Fields 24538c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2466136d2b4SJ. Bruce Fields /* 247996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 248996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 249996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 250996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2516136d2b4SJ. Bruce Fields */ 2526136d2b4SJ. Bruce Fields BUG_ON(error); 2536136d2b4SJ. Bruce Fields /* 2546136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2556136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2566136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2576136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2586136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2596136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2606136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2616136d2b4SJ. Bruce Fields */ 2626136d2b4SJ. Bruce Fields 2636136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2646136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2656136d2b4SJ. Bruce Fields min_stateid = 0; 2666136d2b4SJ. Bruce Fields return new_stid; 26736d44c60SJ. Bruce Fields } 26836d44c60SJ. Bruce Fields 269996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2702a74aba7SJ. Bruce Fields { 2712a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2726136d2b4SJ. Bruce Fields int new_id; 2732a74aba7SJ. Bruce Fields 2742a74aba7SJ. Bruce Fields stid->sc_type = type; 2752a74aba7SJ. Bruce Fields stid->sc_client = cl; 2762a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2776136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2786136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2792a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2802a74aba7SJ. Bruce Fields s->si_generation = 0; 281996e0938SJ. Bruce Fields } 282996e0938SJ. Bruce Fields 283996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 284996e0938SJ. Bruce Fields { 285996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 286996e0938SJ. Bruce Fields 287996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 288996e0938SJ. Bruce Fields return NULL; 289996e0938SJ. Bruce Fields /* 290996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 291996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 292996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 293996e0938SJ. Bruce Fields * preallocated entries. 294996e0938SJ. Bruce Fields */ 295996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2962a74aba7SJ. Bruce Fields } 2972a74aba7SJ. Bruce Fields 2984cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 2994cdc951bSJ. Bruce Fields { 3004cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 3014cdc951bSJ. Bruce Fields } 3024cdc951bSJ. Bruce Fields 3031da177e4SLinus Torvalds static struct nfs4_delegation * 304dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 3051da177e4SLinus Torvalds { 3061da177e4SLinus Torvalds struct nfs4_delegation *dp; 3071da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 310c3e48080SJ. Bruce Fields /* 311c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 312c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 313c3e48080SJ. Bruce Fields * write delegations properly. 314c3e48080SJ. Bruce Fields */ 315c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 316c3e48080SJ. Bruce Fields return NULL; 31747f9940cSMeelap Shah if (fp->fi_had_conflict) 31847f9940cSMeelap Shah return NULL; 319c2f1a551SMeelap Shah if (num_delegations > max_delegations) 320ef0f3390SNeilBrown return NULL; 321996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 3225b2d21c1SNeilBrown if (dp == NULL) 3231da177e4SLinus Torvalds return dp; 324996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 3252a74aba7SJ. Bruce Fields /* 3262a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3276136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3286136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3292a74aba7SJ. Bruce Fields */ 3302a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 331ef0f3390SNeilBrown num_delegations++; 332ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 333ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3341da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 33513cd2184SNeilBrown get_nfs4_file(fp); 3361da177e4SLinus Torvalds dp->dl_file = fp; 3371da177e4SLinus Torvalds dp->dl_type = type; 3386c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3391da177e4SLinus Torvalds dp->dl_time = 0; 3401da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 34157725155SJ. Bruce Fields nfsd4_init_callback(&dp->dl_recall); 3421da177e4SLinus Torvalds return dp; 3431da177e4SLinus Torvalds } 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds void 3461da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3471da177e4SLinus Torvalds { 3481da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3491da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 35013cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3515b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 352ef0f3390SNeilBrown num_delegations--; 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds 356acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3571da177e4SLinus Torvalds { 358acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 359acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 360acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3614ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 362acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 363acfdf5c3SJ. Bruce Fields } 3641da177e4SLinus Torvalds } 3651da177e4SLinus Torvalds 3666136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3676136d2b4SJ. Bruce Fields { 36838c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 36938c2f4b1SJ. Bruce Fields 37038c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3716136d2b4SJ. Bruce Fields } 3726136d2b4SJ. Bruce Fields 3731da177e4SLinus Torvalds /* Called under the state lock. */ 3741da177e4SLinus Torvalds static void 3751da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3761da177e4SLinus Torvalds { 3776136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 378ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3791da177e4SLinus Torvalds spin_lock(&recall_lock); 3805d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3811da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3821da177e4SLinus Torvalds spin_unlock(&recall_lock); 383acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3841da177e4SLinus Torvalds nfs4_put_delegation(dp); 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds /* 3881da177e4SLinus Torvalds * SETCLIENTID state 3891da177e4SLinus Torvalds */ 3901da177e4SLinus Torvalds 39136acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3929089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3939089f1b4SBenny Halevy 394ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 395ddc04c41SJ. Bruce Fields { 396ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 397ddc04c41SJ. Bruce Fields } 398ddc04c41SJ. Bruce Fields 399ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 400ddc04c41SJ. Bruce Fields { 401ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 402ddc04c41SJ. Bruce Fields } 403ddc04c41SJ. Bruce Fields 4041da177e4SLinus Torvalds /* 4051da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 4061da177e4SLinus Torvalds * for lease renewal. 4071da177e4SLinus Torvalds * 4081da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 4091da177e4SLinus Torvalds * for last close replay. 410ac55fdc4SJeff Layton * 411ac55fdc4SJeff Layton * All of the above fields are protected by the client_mutex. 4121da177e4SLinus Torvalds */ 4131da177e4SLinus Torvalds static struct list_head client_lru; 4141da177e4SLinus Torvalds static struct list_head close_lru; 4151da177e4SLinus Torvalds 416f9d7562fSJ. Bruce Fields /* 417f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 418f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 419f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 420f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 421f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 422f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 423f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 424f9d7562fSJ. Bruce Fields * 425f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 426f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 427f9d7562fSJ. Bruce Fields * 428f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 429f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 430f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 431f9d7562fSJ. Bruce Fields * 432f9d7562fSJ. Bruce Fields * which we should reject. 433f9d7562fSJ. Bruce Fields */ 4345ae037e5SJeff Layton static unsigned int 4355ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 436f9d7562fSJ. Bruce Fields int i; 4375ae037e5SJeff Layton unsigned int access = 0; 438f9d7562fSJ. Bruce Fields 439f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 440f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 4415ae037e5SJeff Layton access |= i; 442f9d7562fSJ. Bruce Fields } 4435ae037e5SJeff Layton return access; 444f9d7562fSJ. Bruce Fields } 445f9d7562fSJ. Bruce Fields 4463a328614SJeff Layton static bool 447dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 448f9d7562fSJ. Bruce Fields unsigned int access, deny; 449f9d7562fSJ. Bruce Fields 4505ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 4515ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 452f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 4533a328614SJeff Layton return false; 4543a328614SJeff Layton return true; 455f9d7562fSJ. Bruce Fields } 456f9d7562fSJ. Bruce Fields 45782c5ff1bSJeff Layton /* set share access for a given stateid */ 45882c5ff1bSJeff Layton static inline void 45982c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 46082c5ff1bSJeff Layton { 46182c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 46282c5ff1bSJeff Layton } 46382c5ff1bSJeff Layton 46482c5ff1bSJeff Layton /* clear share access for a given stateid */ 46582c5ff1bSJeff Layton static inline void 46682c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 46782c5ff1bSJeff Layton { 46882c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 46982c5ff1bSJeff Layton } 47082c5ff1bSJeff Layton 47182c5ff1bSJeff Layton /* test whether a given stateid has access */ 47282c5ff1bSJeff Layton static inline bool 47382c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 47482c5ff1bSJeff Layton { 47582c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 47682c5ff1bSJeff Layton } 47782c5ff1bSJeff Layton 478ce0fc43cSJeff Layton /* set share deny for a given stateid */ 479ce0fc43cSJeff Layton static inline void 480ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 481ce0fc43cSJeff Layton { 482ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 483ce0fc43cSJeff Layton } 484ce0fc43cSJeff Layton 485ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 486ce0fc43cSJeff Layton static inline void 487ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 488ce0fc43cSJeff Layton { 489ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 490ce0fc43cSJeff Layton } 491ce0fc43cSJeff Layton 492ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 493ce0fc43cSJeff Layton static inline bool 494ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 495ce0fc43cSJeff Layton { 496ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 497f9d7562fSJ. Bruce Fields } 498f9d7562fSJ. Bruce Fields 499f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 500f9d7562fSJ. Bruce Fields { 5018f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 502f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 503f9d7562fSJ. Bruce Fields return O_RDONLY; 504f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 505f9d7562fSJ. Bruce Fields return O_WRONLY; 506f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 507f9d7562fSJ. Bruce Fields return O_RDWR; 508f9d7562fSJ. Bruce Fields } 509f9d7562fSJ. Bruce Fields BUG(); 510f9d7562fSJ. Bruce Fields } 511f9d7562fSJ. Bruce Fields 51282c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 51382c5ff1bSJeff Layton static void 51482c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 51582c5ff1bSJeff Layton { 51682c5ff1bSJeff Layton int i; 51782c5ff1bSJeff Layton 51882c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 51982c5ff1bSJeff Layton if (test_access(i, stp)) 52082c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 52182c5ff1bSJeff Layton nfs4_access_to_omode(i)); 52282c5ff1bSJeff Layton clear_access(i, stp); 52382c5ff1bSJeff Layton } 52482c5ff1bSJeff Layton } 52582c5ff1bSJeff Layton 526dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 527529d7b2aSJ. Bruce Fields { 528529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 529529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 530529d7b2aSJ. Bruce Fields } 531529d7b2aSJ. Bruce Fields 532dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 533529d7b2aSJ. Bruce Fields { 53482c5ff1bSJeff Layton release_all_access(stp); 535a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5364665e2baSJ. Bruce Fields stp->st_file = NULL; 5374665e2baSJ. Bruce Fields } 5384665e2baSJ. Bruce Fields 539dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5404665e2baSJ. Bruce Fields { 541529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 542529d7b2aSJ. Bruce Fields } 543529d7b2aSJ. Bruce Fields 544dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 545529d7b2aSJ. Bruce Fields { 546529d7b2aSJ. Bruce Fields struct file *file; 547529d7b2aSJ. Bruce Fields 548529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5496136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 550529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 551529d7b2aSJ. Bruce Fields if (file) 552fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 55338c387b5SJ. Bruce Fields close_generic_stateid(stp); 554529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 555529d7b2aSJ. Bruce Fields } 556529d7b2aSJ. Bruce Fields 557fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 558529d7b2aSJ. Bruce Fields { 559dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 560529d7b2aSJ. Bruce Fields 561fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 562fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 563009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 564fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 565fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 566dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 567529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 568529d7b2aSJ. Bruce Fields } 569529d7b2aSJ. Bruce Fields } 570529d7b2aSJ. Bruce Fields 571fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 572529d7b2aSJ. Bruce Fields { 573fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 574fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 575529d7b2aSJ. Bruce Fields } 576529d7b2aSJ. Bruce Fields 577529d7b2aSJ. Bruce Fields static void 578dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 579529d7b2aSJ. Bruce Fields { 580fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 581529d7b2aSJ. Bruce Fields 582529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 583fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 584fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 585fe0750e5SJ. Bruce Fields release_lockowner(lo); 586529d7b2aSJ. Bruce Fields } 587529d7b2aSJ. Bruce Fields } 588529d7b2aSJ. Bruce Fields 58938c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 5902283963fSJ. Bruce Fields { 5912283963fSJ. Bruce Fields unhash_generic_stateid(stp); 5922283963fSJ. Bruce Fields release_stateid_lockowners(stp); 59338c387b5SJ. Bruce Fields close_generic_stateid(stp); 59438c387b5SJ. Bruce Fields } 59538c387b5SJ. Bruce Fields 59638c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 59738c387b5SJ. Bruce Fields { 59838c387b5SJ. Bruce Fields unhash_open_stateid(stp); 5996136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 6002283963fSJ. Bruce Fields free_generic_stateid(stp); 6012283963fSJ. Bruce Fields } 6022283963fSJ. Bruce Fields 603fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 604f1d110caSJ. Bruce Fields { 605dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 606f1d110caSJ. Bruce Fields 607fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 608fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 609fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 610fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 611dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 612f1d110caSJ. Bruce Fields release_open_stateid(stp); 613f1d110caSJ. Bruce Fields } 614f1d110caSJ. Bruce Fields } 615f1d110caSJ. Bruce Fields 616f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 617f7a4d872SJ. Bruce Fields { 618f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 619f7a4d872SJ. Bruce Fields 620f7a4d872SJ. Bruce Fields if (s) { 6216136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 622f7a4d872SJ. Bruce Fields free_generic_stateid(s); 623f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 624f7a4d872SJ. Bruce Fields } 625f7a4d872SJ. Bruce Fields } 626f7a4d872SJ. Bruce Fields 627fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 628f1d110caSJ. Bruce Fields { 629fe0750e5SJ. Bruce Fields unhash_openowner(oo); 630fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 631f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 632fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 633f1d110caSJ. Bruce Fields } 634f1d110caSJ. Bruce Fields 6355282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6365282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6375282fd72SMarc Eshel 6385282fd72SMarc Eshel static inline int 6395282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6405282fd72SMarc Eshel { 6415282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6425282fd72SMarc Eshel 6435282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6445282fd72SMarc Eshel } 6455282fd72SMarc Eshel 6468f199b82STrond Myklebust #ifdef NFSD_DEBUG 6475282fd72SMarc Eshel static inline void 6485282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6495282fd72SMarc Eshel { 6505282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6515282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6525282fd72SMarc Eshel } 6538f199b82STrond Myklebust #else 6548f199b82STrond Myklebust static inline void 6558f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6568f199b82STrond Myklebust { 6578f199b82STrond Myklebust } 6588f199b82STrond Myklebust #endif 6598f199b82STrond Myklebust 6605282fd72SMarc Eshel 661ec6b5d7bSAndy Adamson static void 662ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 663ec6b5d7bSAndy Adamson { 664ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 665ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 666ec6b5d7bSAndy Adamson 667ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 668ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 669ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 670ec6b5d7bSAndy Adamson sid->reserved = 0; 671ec6b5d7bSAndy Adamson } 672ec6b5d7bSAndy Adamson 673ec6b5d7bSAndy Adamson /* 674a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 675a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 676a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 677a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 678a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 679a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 680a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 681a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 682a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 683a649637cSAndy Adamson * for the SEQUENCE op response: 684ec6b5d7bSAndy Adamson */ 685a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 686a649637cSAndy Adamson 687557ce264SAndy Adamson static void 688557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 689557ce264SAndy Adamson { 690557ce264SAndy Adamson int i; 691557ce264SAndy Adamson 692557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 693557ce264SAndy Adamson kfree(ses->se_slots[i]); 694557ce264SAndy Adamson } 695557ce264SAndy Adamson 696efe0cb6dSJ. Bruce Fields /* 697efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 698efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 699efe0cb6dSJ. Bruce Fields */ 700efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 701efe0cb6dSJ. Bruce Fields { 702efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 703efe0cb6dSJ. Bruce Fields } 704efe0cb6dSJ. Bruce Fields 7055b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 706ec6b5d7bSAndy Adamson { 7075b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 7085b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 709ec6b5d7bSAndy Adamson 7105b6feee9SJ. Bruce Fields return size; 711557ce264SAndy Adamson } 712557ce264SAndy Adamson 7135b6feee9SJ. Bruce Fields /* 7145b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 7155b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 71642b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 7175b6feee9SJ. Bruce Fields */ 7185b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 7195b6feee9SJ. Bruce Fields { 7205b6feee9SJ. Bruce Fields int avail; 7215b6feee9SJ. Bruce Fields 7225b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7235b6feee9SJ. Bruce Fields 7245b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7255b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7265b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7275b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7285b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7295b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7305b6feee9SJ. Bruce Fields 7315b6feee9SJ. Bruce Fields return num; 7325b6feee9SJ. Bruce Fields } 7335b6feee9SJ. Bruce Fields 7345b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7355b6feee9SJ. Bruce Fields { 7365b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7375b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7385b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7395b6feee9SJ. Bruce Fields } 7405b6feee9SJ. Bruce Fields 741a827bcb2SJ. Bruce Fields static struct nfsd4_session *__alloc_session(int slotsize, int numslots) 7425b6feee9SJ. Bruce Fields { 7435b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7445b6feee9SJ. Bruce Fields int mem, i; 745ec6b5d7bSAndy Adamson 746c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 747ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7485b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 749ec6b5d7bSAndy Adamson 7505b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7516c18ba9fSAlexandros Batsakis if (!new) 7525b6feee9SJ. Bruce Fields return NULL; 753ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7545b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7555b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7565b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7575b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 758ec6b5d7bSAndy Adamson goto out_free; 759ec6b5d7bSAndy Adamson } 7605b6feee9SJ. Bruce Fields return new; 7615b6feee9SJ. Bruce Fields out_free: 7625b6feee9SJ. Bruce Fields while (i--) 7635b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7645b6feee9SJ. Bruce Fields kfree(new); 7655b6feee9SJ. Bruce Fields return NULL; 7665b6feee9SJ. Bruce Fields } 7675b6feee9SJ. Bruce Fields 7685b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7695b6feee9SJ. Bruce Fields { 7705b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7715b6feee9SJ. Bruce Fields 7725b6feee9SJ. Bruce Fields new->maxreqs = numslots; 773d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 774d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7755b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7765b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7775b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7785b6feee9SJ. Bruce Fields } 7795b6feee9SJ. Bruce Fields 78019cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 78119cf5c02SJ. Bruce Fields { 78219cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 78319cf5c02SJ. Bruce Fields kfree(c); 78419cf5c02SJ. Bruce Fields } 78519cf5c02SJ. Bruce Fields 78619cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 78719cf5c02SJ. Bruce Fields { 78819cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 78919cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 79019cf5c02SJ. Bruce Fields 79119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 79219cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 79319cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 79419cf5c02SJ. Bruce Fields free_conn(c); 79519cf5c02SJ. Bruce Fields } 79619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 797eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 79819cf5c02SJ. Bruce Fields } 79919cf5c02SJ. Bruce Fields 800d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 801c7662518SJ. Bruce Fields { 802c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 803c7662518SJ. Bruce Fields 804c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 805c7662518SJ. Bruce Fields if (!conn) 806db90681dSJ. Bruce Fields return NULL; 807c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 808c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 809d29c374cSJ. Bruce Fields conn->cn_flags = flags; 810db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 811db90681dSJ. Bruce Fields return conn; 812db90681dSJ. Bruce Fields } 813db90681dSJ. Bruce Fields 814328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 815328ead28SJ. Bruce Fields { 816328ead28SJ. Bruce Fields conn->cn_session = ses; 817328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 818328ead28SJ. Bruce Fields } 819328ead28SJ. Bruce Fields 820db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 821db90681dSJ. Bruce Fields { 822db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 823c7662518SJ. Bruce Fields 824c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 825328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 826c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 827db90681dSJ. Bruce Fields } 828c7662518SJ. Bruce Fields 82921b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 830db90681dSJ. Bruce Fields { 83119cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 83221b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 833db90681dSJ. Bruce Fields } 834db90681dSJ. Bruce Fields 835e1ff371fSJ. Bruce Fields static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) 836db90681dSJ. Bruce Fields { 83721b75b01SJ. Bruce Fields int ret; 838db90681dSJ. Bruce Fields 839db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 84021b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 84121b75b01SJ. Bruce Fields if (ret) 84221b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 84321b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 8446a3b1563SJ. Bruce Fields if (conn->cn_flags & NFS4_CDFC4_BACK) { 84524119673SWeston Andros Adamson /* callback channel may be back up */ 84624119673SWeston Andros Adamson nfsd4_probe_callback(ses->se_client); 84724119673SWeston Andros Adamson } 848c7662518SJ. Bruce Fields } 849c7662518SJ. Bruce Fields 850e1ff371fSJ. Bruce Fields static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) 8511d1bc8f2SJ. Bruce Fields { 8521d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8531d1bc8f2SJ. Bruce Fields 854e1ff371fSJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) 8551d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 856e1ff371fSJ. Bruce Fields return alloc_conn(rqstp, dir); 8571d1bc8f2SJ. Bruce Fields } 8581d1bc8f2SJ. Bruce Fields 8591d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 86019cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 861c7662518SJ. Bruce Fields { 86219cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 86319cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 86419cf5c02SJ. Bruce Fields 86519cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 86619cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 86719cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 86819cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 86919cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 87019cf5c02SJ. Bruce Fields 87119cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 87219cf5c02SJ. Bruce Fields free_conn(c); 87319cf5c02SJ. Bruce Fields 87419cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 87519cf5c02SJ. Bruce Fields } 87619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 877c7662518SJ. Bruce Fields } 878c7662518SJ. Bruce Fields 8791377b69eSJ. Bruce Fields static void __free_session(struct nfsd4_session *ses) 8801377b69eSJ. Bruce Fields { 8811377b69eSJ. Bruce Fields nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); 8821377b69eSJ. Bruce Fields free_session_slots(ses); 8831377b69eSJ. Bruce Fields kfree(ses); 8841377b69eSJ. Bruce Fields } 8851377b69eSJ. Bruce Fields 886508dc6e1SBenny Halevy static void free_session(struct kref *kref) 887c7662518SJ. Bruce Fields { 888c7662518SJ. Bruce Fields struct nfsd4_session *ses; 889c7662518SJ. Bruce Fields 890bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 891c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 89219cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 8931377b69eSJ. Bruce Fields __free_session(ses); 894c7662518SJ. Bruce Fields } 895c7662518SJ. Bruce Fields 896508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 897508dc6e1SBenny Halevy { 898508dc6e1SBenny Halevy spin_lock(&client_lock); 899508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 900508dc6e1SBenny Halevy spin_unlock(&client_lock); 901508dc6e1SBenny Halevy } 902508dc6e1SBenny Halevy 903a827bcb2SJ. Bruce Fields static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan) 9045b6feee9SJ. Bruce Fields { 9055b6feee9SJ. Bruce Fields struct nfsd4_session *new; 9065b6feee9SJ. Bruce Fields int numslots, slotsize; 9075b6feee9SJ. Bruce Fields /* 9085b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 9095b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 9105b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 9115b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 9125b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 9135b6feee9SJ. Bruce Fields */ 9145b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 9155b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 916ced6dfe9SMi Jinlong if (numslots < 1) 917ced6dfe9SMi Jinlong return NULL; 9185b6feee9SJ. Bruce Fields 919a827bcb2SJ. Bruce Fields new = __alloc_session(slotsize, numslots); 9205b6feee9SJ. Bruce Fields if (!new) { 9215b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 922ac7c46f2SJ. Bruce Fields return NULL; 9235b6feee9SJ. Bruce Fields } 9245b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 925a827bcb2SJ. Bruce Fields return new; 926a827bcb2SJ. Bruce Fields } 927ec6b5d7bSAndy Adamson 928135ae827SFengguang Wu static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) 929a827bcb2SJ. Bruce Fields { 930a827bcb2SJ. Bruce Fields int idx; 931a827bcb2SJ. Bruce Fields 932ec6b5d7bSAndy Adamson new->se_client = clp; 933ec6b5d7bSAndy Adamson gen_sessionid(new); 934ec6b5d7bSAndy Adamson 935c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 936c7662518SJ. Bruce Fields 937ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 938ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9398b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 940c6bb3ca2SJ. Bruce Fields new->se_cb_sec = cses->cb_sec; 941ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9425b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9439089f1b4SBenny Halevy spin_lock(&client_lock); 944ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9454c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 946ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9474c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9489089f1b4SBenny Halevy spin_unlock(&client_lock); 949ec6b5d7bSAndy Adamson 950dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 951edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 952dcbeaa68SJ. Bruce Fields /* 953dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 954dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 955dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 956dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 957dcbeaa68SJ. Bruce Fields * future: 958dcbeaa68SJ. Bruce Fields */ 959edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 960edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 961edd76786SJ. Bruce Fields } 962ec6b5d7bSAndy Adamson } 963ec6b5d7bSAndy Adamson 9649089f1b4SBenny Halevy /* caller must hold client_lock */ 9655282fd72SMarc Eshel static struct nfsd4_session * 9665282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9675282fd72SMarc Eshel { 9685282fd72SMarc Eshel struct nfsd4_session *elem; 9695282fd72SMarc Eshel int idx; 9705282fd72SMarc Eshel 9715282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9725282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9735282fd72SMarc Eshel /* Search in the appropriate list */ 9745282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 9755282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 9765282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 9775282fd72SMarc Eshel return elem; 9785282fd72SMarc Eshel } 9795282fd72SMarc Eshel } 9805282fd72SMarc Eshel 9815282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 9825282fd72SMarc Eshel return NULL; 9835282fd72SMarc Eshel } 9845282fd72SMarc Eshel 9859089f1b4SBenny Halevy /* caller must hold client_lock */ 9867116ed6bSAndy Adamson static void 9875282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 9887116ed6bSAndy Adamson { 9897116ed6bSAndy Adamson list_del(&ses->se_hash); 9904c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 9917116ed6bSAndy Adamson list_del(&ses->se_perclnt); 9924c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 9935282fd72SMarc Eshel } 9945282fd72SMarc Eshel 99536acb66bSBenny Halevy /* must be called under the client_lock */ 9961da177e4SLinus Torvalds static inline void 99736acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 9981da177e4SLinus Torvalds { 99907cd4909SBenny Halevy if (is_client_expired(clp)) { 10007447758bSJ. Bruce Fields WARN_ON(1); 10017447758bSJ. Bruce Fields printk("%s: client (clientid %08x/%08x) already expired\n", 100207cd4909SBenny Halevy __func__, 100307cd4909SBenny Halevy clp->cl_clientid.cl_boot, 100407cd4909SBenny Halevy clp->cl_clientid.cl_id); 100507cd4909SBenny Halevy return; 100607cd4909SBenny Halevy } 100707cd4909SBenny Halevy 10081da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 10091da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 10101da177e4SLinus Torvalds clp->cl_clientid.cl_id); 10111da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 10121da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds 101536acb66bSBenny Halevy static inline void 101636acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 101736acb66bSBenny Halevy { 101836acb66bSBenny Halevy spin_lock(&client_lock); 101936acb66bSBenny Halevy renew_client_locked(clp); 102036acb66bSBenny Halevy spin_unlock(&client_lock); 102136acb66bSBenny Halevy } 102236acb66bSBenny Halevy 10231da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10241da177e4SLinus Torvalds static int 10252c142baaSStanislav Kinsbursky STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) 10261da177e4SLinus Torvalds { 10272c142baaSStanislav Kinsbursky if (clid->cl_boot == nn->boot_time) 10281da177e4SLinus Torvalds return 0; 102960adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 10302c142baaSStanislav Kinsbursky clid->cl_boot, clid->cl_id, nn->boot_time); 10311da177e4SLinus Torvalds return 1; 10321da177e4SLinus Torvalds } 10331da177e4SLinus Torvalds 10341da177e4SLinus Torvalds /* 10351da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10361da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10371da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10381da177e4SLinus Torvalds */ 103935bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10401da177e4SLinus Torvalds { 10411da177e4SLinus Torvalds struct nfs4_client *clp; 10421da177e4SLinus Torvalds 104335bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 104435bba9a3SJ. Bruce Fields if (clp == NULL) 104535bba9a3SJ. Bruce Fields return NULL; 104667114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 104735bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 104835bba9a3SJ. Bruce Fields kfree(clp); 104935bba9a3SJ. Bruce Fields return NULL; 105035bba9a3SJ. Bruce Fields } 10511da177e4SLinus Torvalds clp->cl_name.len = name.len; 10521da177e4SLinus Torvalds return clp; 10531da177e4SLinus Torvalds } 10541da177e4SLinus Torvalds 10551da177e4SLinus Torvalds static inline void 10561da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10571da177e4SLinus Torvalds { 1058bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 1059792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1060792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1061792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1062792c95ddSJ. Bruce Fields se_perclnt); 1063792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1064508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1065792c95ddSJ. Bruce Fields } 106603a4e1f6SJ. Bruce Fields free_svc_cred(&clp->cl_cred); 10671da177e4SLinus Torvalds kfree(clp->cl_name.data); 10681da177e4SLinus Torvalds kfree(clp); 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds 1071d7682988SBenny Halevy void 1072d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1073d7682988SBenny Halevy { 1074d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1075d7682988SBenny Halevy 1076d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1077d7682988SBenny Halevy return; 1078d7682988SBenny Halevy if (is_client_expired(clp)) { 1079d7682988SBenny Halevy free_client(clp); 1080d7682988SBenny Halevy session->se_client = NULL; 1081d7682988SBenny Halevy } else 1082d7682988SBenny Halevy renew_client_locked(clp); 1083d7682988SBenny Halevy spin_unlock(&client_lock); 1084d7682988SBenny Halevy } 1085d7682988SBenny Halevy 108684d38ac9SBenny Halevy /* must be called under the client_lock */ 108784d38ac9SBenny Halevy static inline void 108884d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 108984d38ac9SBenny Halevy { 1090792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1091792c95ddSJ. Bruce Fields 109207cd4909SBenny Halevy mark_client_expired(clp); 109384d38ac9SBenny Halevy list_del(&clp->cl_lru); 10944c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1095792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1096792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 10974c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 109884d38ac9SBenny Halevy } 109984d38ac9SBenny Halevy 11001da177e4SLinus Torvalds static void 11010d22f68fSJ. Bruce Fields destroy_client(struct nfs4_client *clp) 11021da177e4SLinus Torvalds { 1103fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 11041da177e4SLinus Torvalds struct nfs4_delegation *dp; 11051da177e4SLinus Torvalds struct list_head reaplist; 1106382a62e7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 11071da177e4SLinus Torvalds 11081da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 11091da177e4SLinus Torvalds spin_lock(&recall_lock); 1110ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1111ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1112ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11131da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11141da177e4SLinus Torvalds } 11151da177e4SLinus Torvalds spin_unlock(&recall_lock); 11161da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11171da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11181da177e4SLinus Torvalds unhash_delegation(dp); 11191da177e4SLinus Torvalds } 1120ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1121fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1122fe0750e5SJ. Bruce Fields release_openowner(oo); 11231da177e4SLinus Torvalds } 11246ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11252bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11262bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 112784d38ac9SBenny Halevy list_del(&clp->cl_idhash); 1128ac55fdc4SJeff Layton if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) 1129382a62e7SStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->conf_name_tree); 1130ac55fdc4SJeff Layton else 1131a99454aaSStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); 113284d38ac9SBenny Halevy spin_lock(&client_lock); 113384d38ac9SBenny Halevy unhash_client_locked(clp); 113446583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1135b12a05cbSJ. Bruce Fields free_client(clp); 113646583e25SBenny Halevy spin_unlock(&client_lock); 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds 11390d22f68fSJ. Bruce Fields static void expire_client(struct nfs4_client *clp) 11400d22f68fSJ. Bruce Fields { 11410d22f68fSJ. Bruce Fields nfsd4_client_record_remove(clp); 11420d22f68fSJ. Bruce Fields destroy_client(clp); 11430d22f68fSJ. Bruce Fields } 11440d22f68fSJ. Bruce Fields 114535bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 114635bba9a3SJ. Bruce Fields { 114735bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 114835bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11491da177e4SLinus Torvalds } 11501da177e4SLinus Torvalds 115135bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 115235bba9a3SJ. Bruce Fields { 11531da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11541da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11551da177e4SLinus Torvalds } 11561da177e4SLinus Torvalds 115703a4e1f6SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 115835bba9a3SJ. Bruce Fields { 115903a4e1f6SJ. Bruce Fields if (source->cr_principal) { 116003a4e1f6SJ. Bruce Fields target->cr_principal = 116103a4e1f6SJ. Bruce Fields kstrdup(source->cr_principal, GFP_KERNEL); 116203a4e1f6SJ. Bruce Fields if (target->cr_principal == NULL) 116303a4e1f6SJ. Bruce Fields return -ENOMEM; 116403a4e1f6SJ. Bruce Fields } else 116503a4e1f6SJ. Bruce Fields target->cr_principal = NULL; 1166d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 11671da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11681da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11691da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11701da177e4SLinus Torvalds get_group_info(target->cr_group_info); 117103a4e1f6SJ. Bruce Fields return 0; 11721da177e4SLinus Torvalds } 11731da177e4SLinus Torvalds 1174ac55fdc4SJeff Layton static long long 1175ac55fdc4SJeff Layton compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) 1176ac55fdc4SJeff Layton { 1177ac55fdc4SJeff Layton long long res; 1178ac55fdc4SJeff Layton 1179ac55fdc4SJeff Layton res = o1->len - o2->len; 1180ac55fdc4SJeff Layton if (res) 1181ac55fdc4SJeff Layton return res; 1182ac55fdc4SJeff Layton return (long long)memcmp(o1->data, o2->data, o1->len); 1183ac55fdc4SJeff Layton } 1184ac55fdc4SJeff Layton 118535bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1186599e0a22SJ. Bruce Fields { 1187a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11881da177e4SLinus Torvalds } 11891da177e4SLinus Torvalds 11901da177e4SLinus Torvalds static int 1191599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1192599e0a22SJ. Bruce Fields { 1193599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 11941da177e4SLinus Torvalds } 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds static int 1197599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1198599e0a22SJ. Bruce Fields { 1199599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 12001da177e4SLinus Torvalds } 12011da177e4SLinus Torvalds 12028fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 12038fbba96eSJ. Bruce Fields { 12048fbba96eSJ. Bruce Fields int i; 12058fbba96eSJ. Bruce Fields 12068fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 12078fbba96eSJ. Bruce Fields return false; 12088fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 12098fbba96eSJ. Bruce Fields if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) 12108fbba96eSJ. Bruce Fields return false; 12118fbba96eSJ. Bruce Fields return true; 12128fbba96eSJ. Bruce Fields } 12138fbba96eSJ. Bruce Fields 121468eb3508SJ. Bruce Fields /* 121568eb3508SJ. Bruce Fields * RFC 3530 language requires clid_inuse be returned when the 121668eb3508SJ. Bruce Fields * "principal" associated with a requests differs from that previously 121768eb3508SJ. Bruce Fields * used. We use uid, gid's, and gss principal string as our best 121868eb3508SJ. Bruce Fields * approximation. We also don't want to allow non-gss use of a client 121968eb3508SJ. Bruce Fields * established using gss: in theory cr_principal should catch that 122068eb3508SJ. Bruce Fields * change, but in practice cr_principal can be null even in the gss case 122168eb3508SJ. Bruce Fields * since gssd doesn't always pass down a principal string. 122268eb3508SJ. Bruce Fields */ 122368eb3508SJ. Bruce Fields static bool is_gss_cred(struct svc_cred *cr) 122468eb3508SJ. Bruce Fields { 122568eb3508SJ. Bruce Fields /* Is cr_flavor one of the gss "pseudoflavors"?: */ 122668eb3508SJ. Bruce Fields return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); 122768eb3508SJ. Bruce Fields } 122868eb3508SJ. Bruce Fields 122968eb3508SJ. Bruce Fields 12305559b50aSVivek Trivedi static bool 1231599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1232599e0a22SJ. Bruce Fields { 123368eb3508SJ. Bruce Fields if ((is_gss_cred(cr1) != is_gss_cred(cr2)) 1234d5497fc6SJ. Bruce Fields || (cr1->cr_uid != cr2->cr_uid) 12358fbba96eSJ. Bruce Fields || (cr1->cr_gid != cr2->cr_gid) 12368fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 12378fbba96eSJ. Bruce Fields return false; 12388fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 12398fbba96eSJ. Bruce Fields return true; 12408fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 12418fbba96eSJ. Bruce Fields return false; 12425559b50aSVivek Trivedi return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); 12431da177e4SLinus Torvalds } 12441da177e4SLinus Torvalds 1245c212cecfSStanislav Kinsbursky static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) 12465ec7b46cSJ. Bruce Fields { 12475ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 12485ec7b46cSJ. Bruce Fields 12492c142baaSStanislav Kinsbursky clp->cl_clientid.cl_boot = nn->boot_time; 12501da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 12511da177e4SLinus Torvalds } 12521da177e4SLinus Torvalds 1253deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1254deda2faaSJ. Bruce Fields { 1255ab4684d1SChuck Lever __be32 verf[2]; 1256deda2faaSJ. Bruce Fields static u32 i; 12571da177e4SLinus Torvalds 1258ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1259ab4684d1SChuck Lever verf[1] = (__be32)i++; 1260ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 12611da177e4SLinus Torvalds } 12621da177e4SLinus Torvalds 126338c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 12644581d140SJ. Bruce Fields { 126538c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 12664581d140SJ. Bruce Fields } 12674d71ab87SJ. Bruce Fields 126838c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1269f459e453SJ. Bruce Fields { 1270f459e453SJ. Bruce Fields struct nfs4_stid *s; 1271f459e453SJ. Bruce Fields 127238c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1273f459e453SJ. Bruce Fields if (!s) 1274f459e453SJ. Bruce Fields return NULL; 1275f459e453SJ. Bruce Fields if (typemask & s->sc_type) 12764d71ab87SJ. Bruce Fields return s; 12774581d140SJ. Bruce Fields return NULL; 12784581d140SJ. Bruce Fields } 12794581d140SJ. Bruce Fields 12802216d449SJeff Layton static struct nfs4_client *create_client(struct xdr_netobj name, 1281b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1282b09333c4SRicardo Labiaga { 1283b09333c4SRicardo Labiaga struct nfs4_client *clp; 1284b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 128503a4e1f6SJ. Bruce Fields int ret; 1286c212cecfSStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 1287b09333c4SRicardo Labiaga 1288b09333c4SRicardo Labiaga clp = alloc_client(name); 1289b09333c4SRicardo Labiaga if (clp == NULL) 1290b09333c4SRicardo Labiaga return NULL; 1291b09333c4SRicardo Labiaga 1292792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 129303a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 129403a4e1f6SJ. Bruce Fields if (ret) { 1295508dc6e1SBenny Halevy spin_lock(&client_lock); 1296b09333c4SRicardo Labiaga free_client(clp); 1297508dc6e1SBenny Halevy spin_unlock(&client_lock); 1298b09333c4SRicardo Labiaga return NULL; 1299b09333c4SRicardo Labiaga } 130038c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 130146583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 130277a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1303b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1304b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1305b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1306b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 13075ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 13086ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 130957725155SJ. Bruce Fields nfsd4_init_callback(&clp->cl_cb_null); 131007cd4909SBenny Halevy clp->cl_time = get_seconds(); 1311b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1312b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1313b09333c4SRicardo Labiaga copy_verf(clp, verf); 1314b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1315b09333c4SRicardo Labiaga gen_confirm(clp); 1316edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1317c212cecfSStanislav Kinsbursky clp->net = net; 1318b09333c4SRicardo Labiaga return clp; 1319b09333c4SRicardo Labiaga } 1320b09333c4SRicardo Labiaga 1321fd39ca9aSNeilBrown static void 1322ac55fdc4SJeff Layton add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) 1323ac55fdc4SJeff Layton { 1324ac55fdc4SJeff Layton struct rb_node **new = &(root->rb_node), *parent = NULL; 1325ac55fdc4SJeff Layton struct nfs4_client *clp; 1326ac55fdc4SJeff Layton 1327ac55fdc4SJeff Layton while (*new) { 1328ac55fdc4SJeff Layton clp = rb_entry(*new, struct nfs4_client, cl_namenode); 1329ac55fdc4SJeff Layton parent = *new; 1330ac55fdc4SJeff Layton 1331ac55fdc4SJeff Layton if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) 1332ac55fdc4SJeff Layton new = &((*new)->rb_left); 1333ac55fdc4SJeff Layton else 1334ac55fdc4SJeff Layton new = &((*new)->rb_right); 1335ac55fdc4SJeff Layton } 1336ac55fdc4SJeff Layton 1337ac55fdc4SJeff Layton rb_link_node(&new_clp->cl_namenode, parent, new); 1338ac55fdc4SJeff Layton rb_insert_color(&new_clp->cl_namenode, root); 1339ac55fdc4SJeff Layton } 1340ac55fdc4SJeff Layton 1341ac55fdc4SJeff Layton static struct nfs4_client * 1342ac55fdc4SJeff Layton find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) 1343ac55fdc4SJeff Layton { 1344ac55fdc4SJeff Layton long long cmp; 1345ac55fdc4SJeff Layton struct rb_node *node = root->rb_node; 1346ac55fdc4SJeff Layton struct nfs4_client *clp; 1347ac55fdc4SJeff Layton 1348ac55fdc4SJeff Layton while (node) { 1349ac55fdc4SJeff Layton clp = rb_entry(node, struct nfs4_client, cl_namenode); 1350ac55fdc4SJeff Layton cmp = compare_blob(&clp->cl_name, name); 1351ac55fdc4SJeff Layton if (cmp > 0) 1352ac55fdc4SJeff Layton node = node->rb_left; 1353ac55fdc4SJeff Layton else if (cmp < 0) 1354ac55fdc4SJeff Layton node = node->rb_right; 1355ac55fdc4SJeff Layton else 1356ac55fdc4SJeff Layton return clp; 1357ac55fdc4SJeff Layton } 1358ac55fdc4SJeff Layton return NULL; 1359ac55fdc4SJeff Layton } 1360ac55fdc4SJeff Layton 1361ac55fdc4SJeff Layton static void 1362ac55fdc4SJeff Layton add_to_unconfirmed(struct nfs4_client *clp) 13631da177e4SLinus Torvalds { 13641da177e4SLinus Torvalds unsigned int idhashval; 13650a7ec377SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 13661da177e4SLinus Torvalds 1367ac55fdc4SJeff Layton clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); 1368a99454aaSStanislav Kinsbursky add_clp_to_name_tree(clp, &nn->unconf_name_tree); 13691da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13700a7ec377SStanislav Kinsbursky list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); 137136acb66bSBenny Halevy renew_client(clp); 13721da177e4SLinus Torvalds } 13731da177e4SLinus Torvalds 1374fd39ca9aSNeilBrown static void 13751da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 13761da177e4SLinus Torvalds { 13771da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13788daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 13791da177e4SLinus Torvalds 13801da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 13818daae4dcSStanislav Kinsbursky list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); 1382a99454aaSStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); 1383382a62e7SStanislav Kinsbursky add_clp_to_name_tree(clp, &nn->conf_name_tree); 1384ac55fdc4SJeff Layton set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); 13851da177e4SLinus Torvalds renew_client(clp); 13861da177e4SLinus Torvalds } 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds static struct nfs4_client * 13898daae4dcSStanislav Kinsbursky find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) 13901da177e4SLinus Torvalds { 13911da177e4SLinus Torvalds struct nfs4_client *clp; 13921da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13931da177e4SLinus Torvalds 13948daae4dcSStanislav Kinsbursky list_for_each_entry(clp, &nn->conf_id_hashtbl[idhashval], cl_idhash) { 1395a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1396d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 1397d15c077eSJ. Bruce Fields return NULL; 1398a50d2ad1SJ. Bruce Fields renew_client(clp); 13991da177e4SLinus Torvalds return clp; 14001da177e4SLinus Torvalds } 1401a50d2ad1SJ. Bruce Fields } 14021da177e4SLinus Torvalds return NULL; 14031da177e4SLinus Torvalds } 14041da177e4SLinus Torvalds 14051da177e4SLinus Torvalds static struct nfs4_client * 14060a7ec377SStanislav Kinsbursky find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) 14071da177e4SLinus Torvalds { 14081da177e4SLinus Torvalds struct nfs4_client *clp; 14091da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 14101da177e4SLinus Torvalds 14110a7ec377SStanislav Kinsbursky list_for_each_entry(clp, &nn->unconf_id_hashtbl[idhashval], cl_idhash) { 1412d15c077eSJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1413d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 1414d15c077eSJ. Bruce Fields return NULL; 14151da177e4SLinus Torvalds return clp; 14161da177e4SLinus Torvalds } 1417d15c077eSJ. Bruce Fields } 14181da177e4SLinus Torvalds return NULL; 14191da177e4SLinus Torvalds } 14201da177e4SLinus Torvalds 14216e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1422a1bcecd2SAndy Adamson { 14236e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1424a1bcecd2SAndy Adamson } 1425a1bcecd2SAndy Adamson 142628ce6054SNeilBrown static struct nfs4_client * 1427382a62e7SStanislav Kinsbursky find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) 142828ce6054SNeilBrown { 1429382a62e7SStanislav Kinsbursky return find_clp_in_name_tree(name, &nn->conf_name_tree); 143028ce6054SNeilBrown } 143128ce6054SNeilBrown 143228ce6054SNeilBrown static struct nfs4_client * 1433a99454aaSStanislav Kinsbursky find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) 143428ce6054SNeilBrown { 1435a99454aaSStanislav Kinsbursky return find_clp_in_name_tree(name, &nn->unconf_name_tree); 143628ce6054SNeilBrown } 143728ce6054SNeilBrown 1438fd39ca9aSNeilBrown static void 14396f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 14401da177e4SLinus Torvalds { 144107263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 14426f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 14436f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 14447077ecbaSJeff Layton unsigned short expected_family; 14451da177e4SLinus Torvalds 14467077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 14477077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 14487077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 14497077ecbaSJeff Layton expected_family = AF_INET; 14507077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 14517077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 14527077ecbaSJeff Layton expected_family = AF_INET6; 14537077ecbaSJeff Layton else 14541da177e4SLinus Torvalds goto out_err; 14551da177e4SLinus Torvalds 1456c212cecfSStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, 1457aa9a4ec7SJeff Layton se->se_callback_addr_len, 145807263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 145907263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1460aa9a4ec7SJeff Layton 146107263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 14621da177e4SLinus Torvalds goto out_err; 1463aa9a4ec7SJeff Layton 146407263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 146507263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1466fbf4665fSJeff Layton 146707263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 146807263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1469849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 14701da177e4SLinus Torvalds return; 14711da177e4SLinus Torvalds out_err: 147207263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 147307263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1474849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 14751da177e4SLinus Torvalds "will not receive delegations\n", 14761da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 14771da177e4SLinus Torvalds 14781da177e4SLinus Torvalds return; 14791da177e4SLinus Torvalds } 14801da177e4SLinus Torvalds 1481074fe897SAndy Adamson /* 1482557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1483074fe897SAndy Adamson */ 1484074fe897SAndy Adamson void 1485074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1486074fe897SAndy Adamson { 1487557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1488557ce264SAndy Adamson unsigned int base; 1489074fe897SAndy Adamson 1490557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1491074fe897SAndy Adamson 1492557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1493557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1494bf864a31SAndy Adamson 1495bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1496bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1497557ce264SAndy Adamson slot->sl_datalen = 0; 1498bf864a31SAndy Adamson return; 1499bf864a31SAndy Adamson } 1500557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1501557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1502557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1503557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1504557ce264SAndy Adamson slot->sl_datalen)) 1505557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1506557ce264SAndy Adamson return; 1507074fe897SAndy Adamson } 1508074fe897SAndy Adamson 1509074fe897SAndy Adamson /* 1510abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1511abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1512abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1513abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1514abfabf8cSAndy Adamson * 1515074fe897SAndy Adamson */ 1516abfabf8cSAndy Adamson static __be32 1517abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1518abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1519074fe897SAndy Adamson { 1520abfabf8cSAndy Adamson struct nfsd4_op *op; 1521abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1522074fe897SAndy Adamson 1523abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1524abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1525abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1526abfabf8cSAndy Adamson 1527abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 152873e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1529abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1530abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1531abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1532074fe897SAndy Adamson } 1533abfabf8cSAndy Adamson return op->status; 1534074fe897SAndy Adamson } 1535074fe897SAndy Adamson 1536074fe897SAndy Adamson /* 1537557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1538557ce264SAndy Adamson * session values. 1539074fe897SAndy Adamson */ 1540074fe897SAndy Adamson __be32 1541bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1542bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1543074fe897SAndy Adamson { 1544557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1545074fe897SAndy Adamson __be32 status; 1546074fe897SAndy Adamson 1547557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1548074fe897SAndy Adamson 1549abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1550abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1551abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1552abfabf8cSAndy Adamson return status; 1553074fe897SAndy Adamson 1554557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1555557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1556074fe897SAndy Adamson 1557557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1558557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1559557ce264SAndy Adamson status = slot->sl_status; 1560074fe897SAndy Adamson 1561074fe897SAndy Adamson return status; 1562074fe897SAndy Adamson } 1563074fe897SAndy Adamson 15640733d213SAndy Adamson /* 15650733d213SAndy Adamson * Set the exchange_id flags returned by the server. 15660733d213SAndy Adamson */ 15670733d213SAndy Adamson static void 15680733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 15690733d213SAndy Adamson { 15700733d213SAndy Adamson /* pNFS is not supported */ 15710733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 15720733d213SAndy Adamson 15730733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 15740733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 15750733d213SAndy Adamson 15760733d213SAndy Adamson /* set the wire flags to return to client. */ 15770733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 15780733d213SAndy Adamson } 15790733d213SAndy Adamson 1580631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 1581631fc9eaSJ. Bruce Fields { 1582631fc9eaSJ. Bruce Fields /* 1583631fc9eaSJ. Bruce Fields * Note clp->cl_openowners check isn't quite right: there's no 1584631fc9eaSJ. Bruce Fields * need to count owners without stateid's. 1585631fc9eaSJ. Bruce Fields * 1586631fc9eaSJ. Bruce Fields * Also note we should probably be using this in 4.0 case too. 1587631fc9eaSJ. Bruce Fields */ 15886eccece9SJ. Bruce Fields return !list_empty(&clp->cl_openowners) 15896eccece9SJ. Bruce Fields || !list_empty(&clp->cl_delegations) 15906eccece9SJ. Bruce Fields || !list_empty(&clp->cl_sessions); 1591631fc9eaSJ. Bruce Fields } 1592631fc9eaSJ. Bruce Fields 1593b37ad28bSAl Viro __be32 1594069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1595069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1596069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1597069b6ad4SAndy Adamson { 15980733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 159957b7b43bSJ. Bruce Fields __be32 status; 1600363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 16010733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1602363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 160383e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 1604c212cecfSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 16050733d213SAndy Adamson 1606363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 16070733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1608363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 16090733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1610363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 16110733d213SAndy Adamson 1612a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 16130733d213SAndy Adamson return nfserr_inval; 16140733d213SAndy Adamson 16150733d213SAndy Adamson /* Currently only support SP4_NONE */ 16160733d213SAndy Adamson switch (exid->spa_how) { 16170733d213SAndy Adamson case SP4_NONE: 16180733d213SAndy Adamson break; 16190733d213SAndy Adamson case SP4_SSV: 1620044bc1d4SJ. Bruce Fields return nfserr_serverfault; 16210733d213SAndy Adamson default: 16220733d213SAndy Adamson BUG(); /* checked by xdr code */ 16230733d213SAndy Adamson case SP4_MACH_CRED: 16240733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 16250733d213SAndy Adamson } 16260733d213SAndy Adamson 16272dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 16280733d213SAndy Adamson nfs4_lock_state(); 1629382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&exid->clname, nn); 16300733d213SAndy Adamson if (conf) { 163183e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 163283e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 163383e08fd4SJ. Bruce Fields 1634136e658dSJ. Bruce Fields if (update) { 1635136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 16362dbb269dSJ. Bruce Fields status = nfserr_inval; 1637e203d506SJ. Bruce Fields goto out; 1638e203d506SJ. Bruce Fields } 16392dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 16400733d213SAndy Adamson status = nfserr_perm; 16410733d213SAndy Adamson goto out; 16420733d213SAndy Adamson } 16432dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 16440733d213SAndy Adamson status = nfserr_not_same; 16450733d213SAndy Adamson goto out; 16460733d213SAndy Adamson } 1647136e658dSJ. Bruce Fields /* case 6 */ 16480733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 16490733d213SAndy Adamson new = conf; 16500733d213SAndy Adamson goto out_copy; 16516ddbbbfeSMike Sager } 1652136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 1653631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 1654136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 1655136e658dSJ. Bruce Fields goto out; 1656136e658dSJ. Bruce Fields } 1657b9831b59SJ. Bruce Fields expire_client(conf); 1658b9831b59SJ. Bruce Fields goto out_new; 1659631fc9eaSJ. Bruce Fields } 1660136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 16610f1ba0efSJ. Bruce Fields conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 1662136e658dSJ. Bruce Fields new = conf; 1663136e658dSJ. Bruce Fields goto out_copy; 1664136e658dSJ. Bruce Fields } 16652dbb269dSJ. Bruce Fields /* case 5, client reboot */ 16660733d213SAndy Adamson goto out_new; 16670733d213SAndy Adamson } 16686ddbbbfeSMike Sager 16692dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 16700733d213SAndy Adamson status = nfserr_noent; 16710733d213SAndy Adamson goto out; 16720733d213SAndy Adamson } 16730733d213SAndy Adamson 1674a99454aaSStanislav Kinsbursky unconf = find_unconfirmed_client_by_name(&exid->clname, nn); 16752dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 16760733d213SAndy Adamson expire_client(unconf); 16770733d213SAndy Adamson 16782dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 16790733d213SAndy Adamson out_new: 16802216d449SJeff Layton new = create_client(exid->clname, rqstp, &verf); 16810733d213SAndy Adamson if (new == NULL) { 16824731030dSJ. Bruce Fields status = nfserr_jukebox; 16830733d213SAndy Adamson goto out; 16840733d213SAndy Adamson } 1685c116a0afSJ. Bruce Fields new->cl_minorversion = 1; 16860733d213SAndy Adamson 1687c212cecfSStanislav Kinsbursky gen_clid(new, nn); 1688ac55fdc4SJeff Layton add_to_unconfirmed(new); 16890733d213SAndy Adamson out_copy: 16900733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 16910733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 16920733d213SAndy Adamson 1693778df3f0SJ. Bruce Fields exid->seqid = new->cl_cs_slot.sl_seqid + 1; 16940733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 16950733d213SAndy Adamson 16960733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 169749557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 16980733d213SAndy Adamson status = nfs_ok; 16990733d213SAndy Adamson 17000733d213SAndy Adamson out: 17010733d213SAndy Adamson nfs4_unlock_state(); 17020733d213SAndy Adamson return status; 1703069b6ad4SAndy Adamson } 1704069b6ad4SAndy Adamson 170557b7b43bSJ. Bruce Fields static __be32 170688e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1707b85d4c01SBenny Halevy { 170888e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 170988e588d5SAndy Adamson slot_seqid); 1710b85d4c01SBenny Halevy 1711b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 171288e588d5SAndy Adamson if (slot_inuse) { 171388e588d5SAndy Adamson if (seqid == slot_seqid) 1714b85d4c01SBenny Halevy return nfserr_jukebox; 1715b85d4c01SBenny Halevy else 1716b85d4c01SBenny Halevy return nfserr_seq_misordered; 1717b85d4c01SBenny Halevy } 1718f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 171988e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1720b85d4c01SBenny Halevy return nfs_ok; 172188e588d5SAndy Adamson if (seqid == slot_seqid) 1722b85d4c01SBenny Halevy return nfserr_replay_cache; 1723b85d4c01SBenny Halevy return nfserr_seq_misordered; 1724b85d4c01SBenny Halevy } 1725b85d4c01SBenny Halevy 172649557cc7SAndy Adamson /* 172749557cc7SAndy Adamson * Cache the create session result into the create session single DRC 172849557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 172949557cc7SAndy Adamson * Do this for solo or embedded create session operations. 173049557cc7SAndy Adamson */ 173149557cc7SAndy Adamson static void 173249557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 173357b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 173449557cc7SAndy Adamson { 173549557cc7SAndy Adamson slot->sl_status = nfserr; 173649557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 173749557cc7SAndy Adamson } 173849557cc7SAndy Adamson 173949557cc7SAndy Adamson static __be32 174049557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 174149557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 174249557cc7SAndy Adamson { 174349557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 174449557cc7SAndy Adamson return slot->sl_status; 174549557cc7SAndy Adamson } 174649557cc7SAndy Adamson 17471b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 17481b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 17491b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17501b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 17511b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17521b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 17531b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 17541b74c25bSMi Jinlong 17551b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 17561b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 17571b74c25bSMi Jinlong 1 + /* status */ \ 17581b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17591b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 17601b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17611b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 17621b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 17631b74c25bSMi Jinlong 176457b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 17651b74c25bSMi Jinlong { 17661b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 17671b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 17681b74c25bSMi Jinlong } 17691b74c25bSMi Jinlong 1770069b6ad4SAndy Adamson __be32 1771069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1772069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1773069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1774069b6ad4SAndy Adamson { 1775363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1776ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1777ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 177881f0b2a4SJ. Bruce Fields struct nfsd4_conn *conn; 177949557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 178057b7b43bSJ. Bruce Fields __be32 status = 0; 17818daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1782ec6b5d7bSAndy Adamson 1783a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1784a62573dcSMi Jinlong return nfserr_inval; 178549730501SJ. Bruce Fields if (check_forechannel_attrs(cr_ses->fore_channel)) 178649730501SJ. Bruce Fields return nfserr_toosmall; 178781f0b2a4SJ. Bruce Fields new = alloc_session(&cr_ses->fore_channel); 178881f0b2a4SJ. Bruce Fields if (!new) 178981f0b2a4SJ. Bruce Fields return nfserr_jukebox; 179081f0b2a4SJ. Bruce Fields status = nfserr_jukebox; 179181f0b2a4SJ. Bruce Fields conn = alloc_conn_from_crses(rqstp, cr_ses); 179281f0b2a4SJ. Bruce Fields if (!conn) 179381f0b2a4SJ. Bruce Fields goto out_free_session; 1794a62573dcSMi Jinlong 1795ec6b5d7bSAndy Adamson nfs4_lock_state(); 17960a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); 17978daae4dcSStanislav Kinsbursky conf = find_confirmed_client(&cr_ses->clientid, true, nn); 1798ec6b5d7bSAndy Adamson 1799ec6b5d7bSAndy Adamson if (conf) { 180049557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 180149557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 180238eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 180349557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 180481f0b2a4SJ. Bruce Fields goto out_free_conn; 180549557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1806ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 180781f0b2a4SJ. Bruce Fields goto out_free_conn; 1808ec6b5d7bSAndy Adamson } 1809ec6b5d7bSAndy Adamson } else if (unconf) { 18108f9d3d3bSJ. Bruce Fields struct nfs4_client *old; 1811ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1812363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1813ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 181481f0b2a4SJ. Bruce Fields goto out_free_conn; 1815ec6b5d7bSAndy Adamson } 181649557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 181749557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 181838eb76a5SAndy Adamson if (status) { 181938eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1820ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 182181f0b2a4SJ. Bruce Fields goto out_free_conn; 1822ec6b5d7bSAndy Adamson } 1823382a62e7SStanislav Kinsbursky old = find_confirmed_client_by_name(&unconf->cl_name, nn); 18248f9d3d3bSJ. Bruce Fields if (old) 18258f9d3d3bSJ. Bruce Fields expire_client(old); 18268f9d3d3bSJ. Bruce Fields move_to_confirmed(unconf); 1827ec6b5d7bSAndy Adamson conf = unconf; 1828ec6b5d7bSAndy Adamson } else { 1829ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 183081f0b2a4SJ. Bruce Fields goto out_free_conn; 1831ec6b5d7bSAndy Adamson } 183281f0b2a4SJ. Bruce Fields status = nfs_ok; 18338323c3b2SJ. Bruce Fields /* 1834408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1835408b79bcSJ. Bruce Fields */ 1836408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1837408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1838408b79bcSJ. Bruce Fields 183981f0b2a4SJ. Bruce Fields init_session(rqstp, new, conf, cr_ses); 184081f0b2a4SJ. Bruce Fields nfsd4_init_conn(rqstp, conn, new); 184181f0b2a4SJ. Bruce Fields 1842ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1843ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 184412050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 184512050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 184686c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 184749557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1848ec6b5d7bSAndy Adamson 184949557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 185049557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 1851ec6b5d7bSAndy Adamson out: 1852ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1853ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1854ec6b5d7bSAndy Adamson return status; 185581f0b2a4SJ. Bruce Fields out_free_conn: 185681f0b2a4SJ. Bruce Fields free_conn(conn); 185781f0b2a4SJ. Bruce Fields out_free_session: 185881f0b2a4SJ. Bruce Fields __free_session(new); 185981f0b2a4SJ. Bruce Fields goto out; 1860069b6ad4SAndy Adamson } 1861069b6ad4SAndy Adamson 186257716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 186357716355SJ. Bruce Fields { 186457716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 186557716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 186657716355SJ. Bruce Fields 186757716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 186857716355SJ. Bruce Fields } 186957716355SJ. Bruce Fields 18701d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 18711d1bc8f2SJ. Bruce Fields { 18721d1bc8f2SJ. Bruce Fields switch (*dir) { 18731d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 18741d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 18751d1bc8f2SJ. Bruce Fields return nfs_ok; 18761d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 18771d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 18781d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 18791d1bc8f2SJ. Bruce Fields return nfs_ok; 18801d1bc8f2SJ. Bruce Fields }; 18811d1bc8f2SJ. Bruce Fields return nfserr_inval; 18821d1bc8f2SJ. Bruce Fields } 18831d1bc8f2SJ. Bruce Fields 1884cb73a9f4SJ. Bruce Fields __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) 1885cb73a9f4SJ. Bruce Fields { 1886cb73a9f4SJ. Bruce Fields struct nfsd4_session *session = cstate->session; 1887cb73a9f4SJ. Bruce Fields 1888cb73a9f4SJ. Bruce Fields spin_lock(&client_lock); 1889cb73a9f4SJ. Bruce Fields session->se_cb_prog = bc->bc_cb_program; 1890cb73a9f4SJ. Bruce Fields session->se_cb_sec = bc->bc_cb_sec; 1891cb73a9f4SJ. Bruce Fields spin_unlock(&client_lock); 1892cb73a9f4SJ. Bruce Fields 1893cb73a9f4SJ. Bruce Fields nfsd4_probe_callback(session->se_client); 1894cb73a9f4SJ. Bruce Fields 1895cb73a9f4SJ. Bruce Fields return nfs_ok; 1896cb73a9f4SJ. Bruce Fields } 1897cb73a9f4SJ. Bruce Fields 18981d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 18991d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 19001d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 19011d1bc8f2SJ. Bruce Fields { 19021d1bc8f2SJ. Bruce Fields __be32 status; 19033ba63671SJ. Bruce Fields struct nfsd4_conn *conn; 19041d1bc8f2SJ. Bruce Fields 19051d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 19061d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 19071d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 19081d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 19091d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 19101d1bc8f2SJ. Bruce Fields * client_lock iself: */ 19111d1bc8f2SJ. Bruce Fields if (cstate->session) { 19121d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 19131d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 19141d1bc8f2SJ. Bruce Fields } 19151d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 19161d1bc8f2SJ. Bruce Fields if (!cstate->session) 19171d1bc8f2SJ. Bruce Fields return nfserr_badsession; 19181d1bc8f2SJ. Bruce Fields 19191d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 19203ba63671SJ. Bruce Fields if (status) 19211db2b9ddSBryan Schumaker return status; 19223ba63671SJ. Bruce Fields conn = alloc_conn(rqstp, bcts->dir); 19233ba63671SJ. Bruce Fields if (!conn) 19243ba63671SJ. Bruce Fields return nfserr_jukebox; 1925e1ff371fSJ. Bruce Fields nfsd4_init_conn(rqstp, conn, cstate->session); 19263ba63671SJ. Bruce Fields return nfs_ok; 19271d1bc8f2SJ. Bruce Fields } 19281d1bc8f2SJ. Bruce Fields 19295d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 19305d4cec2fSJ. Bruce Fields { 19315d4cec2fSJ. Bruce Fields if (!session) 19325d4cec2fSJ. Bruce Fields return 0; 19335d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 19345d4cec2fSJ. Bruce Fields } 19355d4cec2fSJ. Bruce Fields 1936069b6ad4SAndy Adamson __be32 1937069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1938069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1939069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1940069b6ad4SAndy Adamson { 1941e10e0cfcSBenny Halevy struct nfsd4_session *ses; 194257b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1943e10e0cfcSBenny Halevy 1944e10e0cfcSBenny Halevy /* Notes: 1945e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1946e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1947e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1948e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1949e10e0cfcSBenny Halevy */ 1950e10e0cfcSBenny Halevy 19515d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 195257716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 195357716355SJ. Bruce Fields return nfserr_not_only_op; 195457716355SJ. Bruce Fields } 1955e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 19569089f1b4SBenny Halevy spin_lock(&client_lock); 1957e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1958e10e0cfcSBenny Halevy if (!ses) { 19599089f1b4SBenny Halevy spin_unlock(&client_lock); 1960e10e0cfcSBenny Halevy goto out; 1961e10e0cfcSBenny Halevy } 1962e10e0cfcSBenny Halevy 1963e10e0cfcSBenny Halevy unhash_session(ses); 19649089f1b4SBenny Halevy spin_unlock(&client_lock); 1965e10e0cfcSBenny Halevy 1966ab707e15SBenny Halevy nfs4_lock_state(); 196784f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1968ab707e15SBenny Halevy nfs4_unlock_state(); 196919cf5c02SJ. Bruce Fields 1970508dc6e1SBenny Halevy spin_lock(&client_lock); 197119cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1972508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1973508dc6e1SBenny Halevy spin_unlock(&client_lock); 1974e10e0cfcSBenny Halevy status = nfs_ok; 1975e10e0cfcSBenny Halevy out: 1976e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1977e10e0cfcSBenny Halevy return status; 1978069b6ad4SAndy Adamson } 1979069b6ad4SAndy Adamson 1980a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1981328ead28SJ. Bruce Fields { 1982328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1983328ead28SJ. Bruce Fields 1984328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1985a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1986328ead28SJ. Bruce Fields return c; 1987328ead28SJ. Bruce Fields } 1988328ead28SJ. Bruce Fields } 1989328ead28SJ. Bruce Fields return NULL; 1990328ead28SJ. Bruce Fields } 1991328ead28SJ. Bruce Fields 1992a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1993328ead28SJ. Bruce Fields { 1994328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1995a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 199621b75b01SJ. Bruce Fields int ret; 1997328ead28SJ. Bruce Fields 1998328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1999a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 2000328ead28SJ. Bruce Fields if (c) { 2001328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 2002328ead28SJ. Bruce Fields free_conn(new); 2003328ead28SJ. Bruce Fields return; 2004328ead28SJ. Bruce Fields } 2005328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 2006328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 200721b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 200821b75b01SJ. Bruce Fields if (ret) 200921b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 201021b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 2011328ead28SJ. Bruce Fields return; 2012328ead28SJ. Bruce Fields } 2013328ead28SJ. Bruce Fields 2014868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 2015868b89c3SMi Jinlong { 2016868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 2017868b89c3SMi Jinlong 2018868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 2019868b89c3SMi Jinlong } 2020868b89c3SMi Jinlong 2021ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 2022ae82a8d0SMi Jinlong struct nfsd4_session *session) 2023ae82a8d0SMi Jinlong { 2024ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 2025ae82a8d0SMi Jinlong 2026ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 2027ae82a8d0SMi Jinlong } 2028ae82a8d0SMi Jinlong 2029069b6ad4SAndy Adamson __be32 2030b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 2031069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 2032069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 2033069b6ad4SAndy Adamson { 2034f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 2035b85d4c01SBenny Halevy struct nfsd4_session *session; 2036b85d4c01SBenny Halevy struct nfsd4_slot *slot; 2037a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 203857b7b43bSJ. Bruce Fields __be32 status; 2039b85d4c01SBenny Halevy 2040f9bb94c4SAndy Adamson if (resp->opcnt != 1) 2041f9bb94c4SAndy Adamson return nfserr_sequence_pos; 2042f9bb94c4SAndy Adamson 2043a663bdd8SJ. Bruce Fields /* 2044a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 2045a663bdd8SJ. Bruce Fields * below. 2046a663bdd8SJ. Bruce Fields */ 2047a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 2048a663bdd8SJ. Bruce Fields if (!conn) 2049a663bdd8SJ. Bruce Fields return nfserr_jukebox; 2050a663bdd8SJ. Bruce Fields 20519089f1b4SBenny Halevy spin_lock(&client_lock); 2052b85d4c01SBenny Halevy status = nfserr_badsession; 2053b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 2054b85d4c01SBenny Halevy if (!session) 2055b85d4c01SBenny Halevy goto out; 2056b85d4c01SBenny Halevy 2057868b89c3SMi Jinlong status = nfserr_too_many_ops; 2058868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 2059868b89c3SMi Jinlong goto out; 2060868b89c3SMi Jinlong 2061ae82a8d0SMi Jinlong status = nfserr_req_too_big; 2062ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 2063ae82a8d0SMi Jinlong goto out; 2064ae82a8d0SMi Jinlong 2065b85d4c01SBenny Halevy status = nfserr_badslot; 20666c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 2067b85d4c01SBenny Halevy goto out; 2068b85d4c01SBenny Halevy 2069557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 2070b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 2071b85d4c01SBenny Halevy 2072a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 2073a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 2074a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 2075a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 2076a8dfdaebSAndy Adamson 207773e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 207873e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 2079b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 2080bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 2081bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 2082bf5c43c8SJ. Bruce Fields goto out; 2083b85d4c01SBenny Halevy cstate->slot = slot; 2084b85d4c01SBenny Halevy cstate->session = session; 2085da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 2086557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 2087bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 2088da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2089aaf84eb9SBenny Halevy goto out; 2090b85d4c01SBenny Halevy } 2091b85d4c01SBenny Halevy if (status) 2092b85d4c01SBenny Halevy goto out; 2093b85d4c01SBenny Halevy 2094a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 2095a663bdd8SJ. Bruce Fields conn = NULL; 2096328ead28SJ. Bruce Fields 2097b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2098b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2099bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 210073e79482SJ. Bruce Fields if (seq->cachethis) 210173e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2102bf5c43c8SJ. Bruce Fields else 2103bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2104b85d4c01SBenny Halevy 2105b85d4c01SBenny Halevy cstate->slot = slot; 2106b85d4c01SBenny Halevy cstate->session = session; 2107b85d4c01SBenny Halevy 2108b85d4c01SBenny Halevy out: 210926c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 2110aaf84eb9SBenny Halevy if (cstate->session) { 21110d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 21120d7bb719SJ. Bruce Fields 211336acb66bSBenny Halevy nfsd4_get_session(cstate->session); 21140d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 21155423732aSBenny Halevy switch (clp->cl_cb_state) { 21165423732aSBenny Halevy case NFSD4_CB_DOWN: 2117fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 21185423732aSBenny Halevy break; 21195423732aSBenny Halevy case NFSD4_CB_FAULT: 2120fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 21215423732aSBenny Halevy break; 2122fc0c3dd1SBenny Halevy default: 2123fc0c3dd1SBenny Halevy seq->status_flags = 0; 21245423732aSBenny Halevy } 2125aaf84eb9SBenny Halevy } 2126a663bdd8SJ. Bruce Fields kfree(conn); 212736acb66bSBenny Halevy spin_unlock(&client_lock); 2128b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2129b85d4c01SBenny Halevy return status; 2130069b6ad4SAndy Adamson } 2131069b6ad4SAndy Adamson 2132345c2842SMi Jinlong __be32 2133345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2134345c2842SMi Jinlong { 2135345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 213657b7b43bSJ. Bruce Fields __be32 status = 0; 21378daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2138345c2842SMi Jinlong 2139345c2842SMi Jinlong nfs4_lock_state(); 21400a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(&dc->clientid, true, nn); 21418daae4dcSStanislav Kinsbursky conf = find_confirmed_client(&dc->clientid, true, nn); 2142345c2842SMi Jinlong 2143345c2842SMi Jinlong if (conf) { 2144345c2842SMi Jinlong clp = conf; 2145345c2842SMi Jinlong 21466eccece9SJ. Bruce Fields if (!is_client_expired(conf) && client_has_state(conf)) { 2147345c2842SMi Jinlong status = nfserr_clientid_busy; 2148345c2842SMi Jinlong goto out; 2149345c2842SMi Jinlong } 2150345c2842SMi Jinlong 2151345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2152345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2153345c2842SMi Jinlong status = nfserr_clientid_busy; 2154345c2842SMi Jinlong goto out; 2155345c2842SMi Jinlong } 2156345c2842SMi Jinlong } else if (unconf) 2157345c2842SMi Jinlong clp = unconf; 2158345c2842SMi Jinlong else { 2159345c2842SMi Jinlong status = nfserr_stale_clientid; 2160345c2842SMi Jinlong goto out; 2161345c2842SMi Jinlong } 2162345c2842SMi Jinlong 2163345c2842SMi Jinlong expire_client(clp); 2164345c2842SMi Jinlong out: 2165345c2842SMi Jinlong nfs4_unlock_state(); 2166345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2167345c2842SMi Jinlong return status; 2168345c2842SMi Jinlong } 2169345c2842SMi Jinlong 2170069b6ad4SAndy Adamson __be32 21714dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 21724dc6ec00SJ. Bruce Fields { 217357b7b43bSJ. Bruce Fields __be32 status = 0; 2174bcecf1ccSMi Jinlong 21754dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 21764dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 21774dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 21784dc6ec00SJ. Bruce Fields /* 21794dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 21804dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 21814dc6ec00SJ. Bruce Fields */ 21824dc6ec00SJ. Bruce Fields return nfs_ok; 21834dc6ec00SJ. Bruce Fields } 2184bcecf1ccSMi Jinlong 21854dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2186bcecf1ccSMi Jinlong status = nfserr_complete_already; 2187a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2188a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2189bcecf1ccSMi Jinlong goto out; 2190bcecf1ccSMi Jinlong 2191bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2192bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 21934dc6ec00SJ. Bruce Fields /* 21944dc6ec00SJ. Bruce Fields * The following error isn't really legal. 21954dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 21964dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 21974dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 21984dc6ec00SJ. Bruce Fields * client. 21994dc6ec00SJ. Bruce Fields */ 2200bcecf1ccSMi Jinlong goto out; 2201bcecf1ccSMi Jinlong 2202bcecf1ccSMi Jinlong status = nfs_ok; 22032a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2204bcecf1ccSMi Jinlong out: 22054dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2206bcecf1ccSMi Jinlong return status; 22074dc6ec00SJ. Bruce Fields } 22084dc6ec00SJ. Bruce Fields 22094dc6ec00SJ. Bruce Fields __be32 2210b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2211b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 22121da177e4SLinus Torvalds { 2213a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 22141da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 221528ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2216b37ad28bSAl Viro __be32 status; 2217c212cecfSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2218a55370a3SNeilBrown 221963db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 22201da177e4SLinus Torvalds nfs4_lock_state(); 2221382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&clname, nn); 222228ce6054SNeilBrown if (conf) { 222363db4632SJ. Bruce Fields /* case 0: */ 22241da177e4SLinus Torvalds status = nfserr_clid_inuse; 2225e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2226e203d506SJ. Bruce Fields goto out; 2227026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2228363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2229363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2230363168b4SJeff Layton sizeof(addr_str)); 2231026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2232363168b4SJeff Layton "at %s\n", addr_str); 22331da177e4SLinus Torvalds goto out; 22341da177e4SLinus Torvalds } 22351da177e4SLinus Torvalds } 2236a99454aaSStanislav Kinsbursky unconf = find_unconfirmed_client_by_name(&clname, nn); 22371da177e4SLinus Torvalds if (unconf) 22381da177e4SLinus Torvalds expire_client(unconf); 22398f930711SJ. Bruce Fields status = nfserr_jukebox; 22402216d449SJeff Layton new = create_client(clname, rqstp, &clverifier); 2241a55370a3SNeilBrown if (new == NULL) 22421da177e4SLinus Torvalds goto out; 224334b232bbSJ. Bruce Fields if (conf && same_verf(&conf->cl_verifier, &clverifier)) 224463db4632SJ. Bruce Fields /* case 1: probable callback update */ 22451da177e4SLinus Torvalds copy_clid(new, conf); 224634b232bbSJ. Bruce Fields else /* case 4 (new client) or cases 2, 3 (client reboot): */ 2247c212cecfSStanislav Kinsbursky gen_clid(new, nn); 22488323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 22496f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2250ac55fdc4SJeff Layton add_to_unconfirmed(new); 22511da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 22521da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 22531da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22541da177e4SLinus Torvalds status = nfs_ok; 22551da177e4SLinus Torvalds out: 22561da177e4SLinus Torvalds nfs4_unlock_state(); 22571da177e4SLinus Torvalds return status; 22581da177e4SLinus Torvalds } 22591da177e4SLinus Torvalds 22601da177e4SLinus Torvalds 2261b37ad28bSAl Viro __be32 2262b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2263b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2264b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22651da177e4SLinus Torvalds { 226621ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22671da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22681da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2269b37ad28bSAl Viro __be32 status; 22707f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 22711da177e4SLinus Torvalds 22722c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 22731da177e4SLinus Torvalds return nfserr_stale_clientid; 22741da177e4SLinus Torvalds nfs4_lock_state(); 227521ab45a4SNeilBrown 22768daae4dcSStanislav Kinsbursky conf = find_confirmed_client(clid, false, nn); 22770a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(clid, false, nn); 2278a186e767SJ. Bruce Fields /* 22798695b90aSJ. Bruce Fields * We try hard to give out unique clientid's, so if we get an 22808695b90aSJ. Bruce Fields * attempt to confirm the same clientid with a different cred, 22818695b90aSJ. Bruce Fields * there's a bug somewhere. Let's charitably assume it's our 22828695b90aSJ. Bruce Fields * bug. 2283a186e767SJ. Bruce Fields */ 22848695b90aSJ. Bruce Fields status = nfserr_serverfault; 22858695b90aSJ. Bruce Fields if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) 22868695b90aSJ. Bruce Fields goto out; 22878695b90aSJ. Bruce Fields if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22888695b90aSJ. Bruce Fields goto out; 228963db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 229090d700b7SJ. Bruce Fields if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { 229190d700b7SJ. Bruce Fields if (conf && !unconf) /* case 2: probable retransmit */ 229290d700b7SJ. Bruce Fields status = nfs_ok; 229390d700b7SJ. Bruce Fields else /* case 4: client hasn't noticed we rebooted yet? */ 229490d700b7SJ. Bruce Fields status = nfserr_stale_clientid; 229590d700b7SJ. Bruce Fields goto out; 229690d700b7SJ. Bruce Fields } 229790d700b7SJ. Bruce Fields status = nfs_ok; 229890d700b7SJ. Bruce Fields if (conf) { /* case 1: callback update */ 22995a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 23005a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 23011a69c179SNeilBrown expire_client(unconf); 230290d700b7SJ. Bruce Fields } else { /* case 3: normal case; new or rebooted client */ 2303382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&unconf->cl_name, nn); 23040d22f68fSJ. Bruce Fields if (conf) 23051a69c179SNeilBrown expire_client(conf); 23061da177e4SLinus Torvalds move_to_confirmed(unconf); 2307f3d03b92SJ. Bruce Fields nfsd4_probe_callback(unconf); 230808e8987cSNeilBrown } 23091da177e4SLinus Torvalds out: 23101da177e4SLinus Torvalds nfs4_unlock_state(); 23111da177e4SLinus Torvalds return status; 23121da177e4SLinus Torvalds } 23131da177e4SLinus Torvalds 231432513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 23151da177e4SLinus Torvalds { 231632513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 231732513b40SJ. Bruce Fields } 231832513b40SJ. Bruce Fields 231932513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 232032513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 232132513b40SJ. Bruce Fields { 23221da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23231da177e4SLinus Torvalds 23248b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 23251da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 23268beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 23278beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 23281da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 232947f9940cSMeelap Shah fp->fi_had_conflict = false; 2330acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2331f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2332f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 233347cee541SPavel Emelyanov spin_lock(&recall_lock); 233447cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 233547cee541SPavel Emelyanov spin_unlock(&recall_lock); 23361da177e4SLinus Torvalds } 23371da177e4SLinus Torvalds 23381da177e4SLinus Torvalds static void 2339e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2340e60d4398SNeilBrown { 2341e60d4398SNeilBrown if (*slab == NULL) 2342e60d4398SNeilBrown return; 23431a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2344e60d4398SNeilBrown *slab = NULL; 2345e60d4398SNeilBrown } 2346e60d4398SNeilBrown 2347e8ff2a84SJ. Bruce Fields void 2348e60d4398SNeilBrown nfsd4_free_slabs(void) 2349e60d4398SNeilBrown { 2350fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2351fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2352e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23535ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23545b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2355e60d4398SNeilBrown } 23561da177e4SLinus Torvalds 235772083396SBryan Schumaker int 23581da177e4SLinus Torvalds nfsd4_init_slabs(void) 23591da177e4SLinus Torvalds { 2360fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2361fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2362fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2363fe0750e5SJ. Bruce Fields goto out_nomem; 2364fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 23653c40794bSYanchuan Nian sizeof(struct nfs4_lockowner), 0, 0, NULL); 2366fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2367e60d4398SNeilBrown goto out_nomem; 2368e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 236920c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2370e60d4398SNeilBrown if (file_slab == NULL) 2371e60d4398SNeilBrown goto out_nomem; 23725ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2373dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23745ac049acSNeilBrown if (stateid_slab == NULL) 23755ac049acSNeilBrown goto out_nomem; 23765b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 237720c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23785b2d21c1SNeilBrown if (deleg_slab == NULL) 23795b2d21c1SNeilBrown goto out_nomem; 2380e60d4398SNeilBrown return 0; 2381e60d4398SNeilBrown out_nomem: 2382e60d4398SNeilBrown nfsd4_free_slabs(); 23831da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23841da177e4SLinus Torvalds return -ENOMEM; 23851da177e4SLinus Torvalds } 23861da177e4SLinus Torvalds 2387fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23881da177e4SLinus Torvalds { 2389fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2390fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2391fe0750e5SJ. Bruce Fields } 2392fe0750e5SJ. Bruce Fields 2393fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2394fe0750e5SJ. Bruce Fields { 2395fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2396fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23971da177e4SLinus Torvalds } 23981da177e4SLinus Torvalds 2399ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2400ff194bd9SJ. Bruce Fields { 2401ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2402ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2403ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2404ff194bd9SJ. Bruce Fields } 2405ff194bd9SJ. Bruce Fields 2406fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 24071da177e4SLinus Torvalds { 24081da177e4SLinus Torvalds struct nfs4_stateowner *sop; 24091da177e4SLinus Torvalds 2410fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2411ff194bd9SJ. Bruce Fields if (!sop) 2412ff194bd9SJ. Bruce Fields return NULL; 2413ff194bd9SJ. Bruce Fields 2414ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2415ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2416fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2417ff194bd9SJ. Bruce Fields return NULL; 2418ff194bd9SJ. Bruce Fields } 24191da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2420ff194bd9SJ. Bruce Fields 2421ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2422ff194bd9SJ. Bruce Fields sop->so_client = clp; 2423ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 24241da177e4SLinus Torvalds return sop; 24251da177e4SLinus Torvalds } 2426ff194bd9SJ. Bruce Fields 2427fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2428ff194bd9SJ. Bruce Fields { 24299b531137SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 24309b531137SStanislav Kinsbursky 24319b531137SStanislav Kinsbursky list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); 2432fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 24331da177e4SLinus Torvalds } 24341da177e4SLinus Torvalds 2435fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24361da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2437fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 24381da177e4SLinus Torvalds 2439fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2440fe0750e5SJ. Bruce Fields if (!oo) 24411da177e4SLinus Torvalds return NULL; 2442fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2443fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2444d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2445fe0750e5SJ. Bruce Fields oo->oo_time = 0; 244638c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2447fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2448fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2449fe0750e5SJ. Bruce Fields return oo; 24501da177e4SLinus Torvalds } 24511da177e4SLinus Torvalds 2452996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2453fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2454d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24551da177e4SLinus Torvalds 2456996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2457ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2458fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24598beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2460fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 246113cd2184SNeilBrown get_nfs4_file(fp); 24621da177e4SLinus Torvalds stp->st_file = fp; 24631da177e4SLinus Torvalds stp->st_access_bmap = 0; 24641da177e4SLinus Torvalds stp->st_deny_bmap = 0; 246582c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2466ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 24674c4cd222SNeilBrown stp->st_openstp = NULL; 24681da177e4SLinus Torvalds } 24691da177e4SLinus Torvalds 24701da177e4SLinus Torvalds static void 2471fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24721da177e4SLinus Torvalds { 2473fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24741da177e4SLinus Torvalds 2475fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2476fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24771da177e4SLinus Torvalds } 24781da177e4SLinus Torvalds 24791da177e4SLinus Torvalds static int 2480599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2481599e0a22SJ. Bruce Fields clientid_t *clid) 2482599e0a22SJ. Bruce Fields { 2483599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2484599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2485599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24861da177e4SLinus Torvalds } 24871da177e4SLinus Torvalds 2488fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24899b531137SStanislav Kinsbursky find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, 24909b531137SStanislav Kinsbursky bool sessions, struct nfsd_net *nn) 24911da177e4SLinus Torvalds { 2492a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2493a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 2494d15c077eSJ. Bruce Fields struct nfs4_client *clp; 24951da177e4SLinus Torvalds 24969b531137SStanislav Kinsbursky list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { 249716bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 249816bfdaafSJ. Bruce Fields continue; 2499a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2500a50d2ad1SJ. Bruce Fields oo = openowner(so); 2501d15c077eSJ. Bruce Fields clp = oo->oo_owner.so_client; 2502d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 2503d15c077eSJ. Bruce Fields return NULL; 2504a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2505a50d2ad1SJ. Bruce Fields return oo; 2506a50d2ad1SJ. Bruce Fields } 25071da177e4SLinus Torvalds } 25081da177e4SLinus Torvalds return NULL; 25091da177e4SLinus Torvalds } 25101da177e4SLinus Torvalds 25111da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 25121da177e4SLinus Torvalds static struct nfs4_file * 25131da177e4SLinus Torvalds find_file(struct inode *ino) 25141da177e4SLinus Torvalds { 25151da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 25161da177e4SLinus Torvalds struct nfs4_file *fp; 25171da177e4SLinus Torvalds 25188b671b80SJ. Bruce Fields spin_lock(&recall_lock); 25191da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 252013cd2184SNeilBrown if (fp->fi_inode == ino) { 252113cd2184SNeilBrown get_nfs4_file(fp); 25228b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25231da177e4SLinus Torvalds return fp; 25241da177e4SLinus Torvalds } 252513cd2184SNeilBrown } 25268b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25271da177e4SLinus Torvalds return NULL; 25281da177e4SLinus Torvalds } 25291da177e4SLinus Torvalds 25304f83aa30SJ. Bruce Fields /* 25311da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 25321da177e4SLinus Torvalds * WRITE with all zero or all one stateid 25331da177e4SLinus Torvalds */ 2534b37ad28bSAl Viro static __be32 25351da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 25361da177e4SLinus Torvalds { 25371da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25381da177e4SLinus Torvalds struct nfs4_file *fp; 2539dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2540b37ad28bSAl Viro __be32 ret; 25411da177e4SLinus Torvalds 25421da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 25431da177e4SLinus Torvalds 25441da177e4SLinus Torvalds fp = find_file(ino); 254513cd2184SNeilBrown if (!fp) 254613cd2184SNeilBrown return nfs_ok; 2547b700949bSNeilBrown ret = nfserr_locked; 25481da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25498beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2550ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2551ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 255213cd2184SNeilBrown goto out; 25531da177e4SLinus Torvalds } 255413cd2184SNeilBrown ret = nfs_ok; 255513cd2184SNeilBrown out: 255613cd2184SNeilBrown put_nfs4_file(fp); 255713cd2184SNeilBrown return ret; 25581da177e4SLinus Torvalds } 25591da177e4SLinus Torvalds 25606b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25611da177e4SLinus Torvalds { 25621da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25631da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25641da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25651da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25661da177e4SLinus Torvalds * it's safe to take a reference: */ 25671da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25681da177e4SLinus Torvalds 25691da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25701da177e4SLinus Torvalds 2571460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25721da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25731da177e4SLinus Torvalds 25746b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25756b57d9c8SJ. Bruce Fields } 25766b57d9c8SJ. Bruce Fields 2577acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25786b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25796b57d9c8SJ. Bruce Fields { 2580acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2581acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25826b57d9c8SJ. Bruce Fields 25837fa10cd1SJ. Bruce Fields if (!fp) { 25847fa10cd1SJ. Bruce Fields WARN(1, "(%p)->fl_owner NULL\n", fl); 25857fa10cd1SJ. Bruce Fields return; 25867fa10cd1SJ. Bruce Fields } 25877fa10cd1SJ. Bruce Fields if (fp->fi_had_conflict) { 25887fa10cd1SJ. Bruce Fields WARN(1, "duplicate break on %p\n", fp); 25897fa10cd1SJ. Bruce Fields return; 25907fa10cd1SJ. Bruce Fields } 25910272e1fdSJ. Bruce Fields /* 25920272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2593acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25946b57d9c8SJ. Bruce Fields * in time: 25950272e1fdSJ. Bruce Fields */ 25960272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25971da177e4SLinus Torvalds 25985d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2599acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2600acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 26015d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 26025d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 26031da177e4SLinus Torvalds } 26041da177e4SLinus Torvalds 26051da177e4SLinus Torvalds static 26061da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 26071da177e4SLinus Torvalds { 26081da177e4SLinus Torvalds if (arg & F_UNLCK) 26091da177e4SLinus Torvalds return lease_modify(onlist, arg); 26101da177e4SLinus Torvalds else 26111da177e4SLinus Torvalds return -EAGAIN; 26121da177e4SLinus Torvalds } 26131da177e4SLinus Torvalds 26147b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 26158fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 26168fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 26171da177e4SLinus Torvalds }; 26181da177e4SLinus Torvalds 26197a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 26207a8711c9SJ. Bruce Fields { 26217a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 26227a8711c9SJ. Bruce Fields return nfs_ok; 26237a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 26247a8711c9SJ. Bruce Fields return nfserr_replay_me; 26257a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 26267a8711c9SJ. Bruce Fields return nfs_ok; 26277a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 26287a8711c9SJ. Bruce Fields } 26291da177e4SLinus Torvalds 2630b37ad28bSAl Viro __be32 26316668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 26326668958fSAndy Adamson struct nfsd4_open *open) 26331da177e4SLinus Torvalds { 26341da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 26351da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 26361da177e4SLinus Torvalds unsigned int strhashval; 2637fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 26384cdc951bSJ. Bruce Fields __be32 status; 26392c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 26401da177e4SLinus Torvalds 26412c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&open->op_clientid, nn)) 26421da177e4SLinus Torvalds return nfserr_stale_clientid; 264332513b40SJ. Bruce Fields /* 264432513b40SJ. Bruce Fields * In case we need it later, after we've already created the 264532513b40SJ. Bruce Fields * file and don't want to risk a further failure: 264632513b40SJ. Bruce Fields */ 264732513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 264832513b40SJ. Bruce Fields if (open->op_file == NULL) 264932513b40SJ. Bruce Fields return nfserr_jukebox; 26501da177e4SLinus Torvalds 265116bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 26529b531137SStanislav Kinsbursky oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); 2653fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2654fe0750e5SJ. Bruce Fields if (!oo) { 26558daae4dcSStanislav Kinsbursky clp = find_confirmed_client(clientid, cstate->minorversion, 26568daae4dcSStanislav Kinsbursky nn); 26570f442aa2SJ. Bruce Fields if (clp == NULL) 26580f442aa2SJ. Bruce Fields return nfserr_expired; 2659bcf130f9SJ. Bruce Fields goto new_owner; 26600f442aa2SJ. Bruce Fields } 2661dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26620f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2663fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2664fe0750e5SJ. Bruce Fields release_openowner(oo); 2665fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2666bcf130f9SJ. Bruce Fields goto new_owner; 26670f442aa2SJ. Bruce Fields } 26684cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26694cdc951bSJ. Bruce Fields if (status) 26704cdc951bSJ. Bruce Fields return status; 26714cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26724cdc951bSJ. Bruce Fields goto alloc_stateid; 2673bcf130f9SJ. Bruce Fields new_owner: 2674fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2675fe0750e5SJ. Bruce Fields if (oo == NULL) 26763e772463SJ. Bruce Fields return nfserr_jukebox; 2677fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26784cdc951bSJ. Bruce Fields alloc_stateid: 26794cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26804cdc951bSJ. Bruce Fields if (!open->op_stp) 26814cdc951bSJ. Bruce Fields return nfserr_jukebox; 26820f442aa2SJ. Bruce Fields return nfs_ok; 26831da177e4SLinus Torvalds } 26841da177e4SLinus Torvalds 2685b37ad28bSAl Viro static inline __be32 26864a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26874a6e43e6SNeilBrown { 26884a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26894a6e43e6SNeilBrown return nfserr_openmode; 26904a6e43e6SNeilBrown else 26914a6e43e6SNeilBrown return nfs_ok; 26924a6e43e6SNeilBrown } 26934a6e43e6SNeilBrown 2694c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 269524a0111eSJ. Bruce Fields { 269624a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 269724a0111eSJ. Bruce Fields } 269824a0111eSJ. Bruce Fields 269938c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2700f459e453SJ. Bruce Fields { 2701f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2702f459e453SJ. Bruce Fields 270338c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2704f459e453SJ. Bruce Fields if (!ret) 2705f459e453SJ. Bruce Fields return NULL; 2706f459e453SJ. Bruce Fields return delegstateid(ret); 2707f459e453SJ. Bruce Fields } 2708f459e453SJ. Bruce Fields 27098b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 27108b289b2cSJ. Bruce Fields { 27118b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 27128b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 27138b289b2cSJ. Bruce Fields } 27148b289b2cSJ. Bruce Fields 2715b37ad28bSAl Viro static __be32 271638c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2717567d9829SNeilBrown struct nfs4_delegation **dp) 2718567d9829SNeilBrown { 2719567d9829SNeilBrown int flags; 2720b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2721567d9829SNeilBrown 272238c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2723567d9829SNeilBrown if (*dp == NULL) 2724c44c5eebSNeilBrown goto out; 272524a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2726567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2727567d9829SNeilBrown if (status) 2728567d9829SNeilBrown *dp = NULL; 2729c44c5eebSNeilBrown out: 27308b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2731c44c5eebSNeilBrown return nfs_ok; 2732c44c5eebSNeilBrown if (status) 2733c44c5eebSNeilBrown return status; 2734dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2735c44c5eebSNeilBrown return nfs_ok; 2736567d9829SNeilBrown } 2737567d9829SNeilBrown 2738b37ad28bSAl Viro static __be32 2739dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 27401da177e4SLinus Torvalds { 2741dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2742fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 27431da177e4SLinus Torvalds 27448beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 27451da177e4SLinus Torvalds /* ignore lock owners */ 27461da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 27471da177e4SLinus Torvalds continue; 27481da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2749fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 27501da177e4SLinus Torvalds *stpp = local; 27511da177e4SLinus Torvalds /* check for conflicting share reservations */ 27521da177e4SLinus Torvalds if (!test_share(local, open)) 275377eaae8dSJ. Bruce Fields return nfserr_share_denied; 27541da177e4SLinus Torvalds } 275577eaae8dSJ. Bruce Fields return nfs_ok; 27561da177e4SLinus Torvalds } 27571da177e4SLinus Torvalds 275821fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 275921fb4016SJ. Bruce Fields { 276021fb4016SJ. Bruce Fields int flags = 0; 276121fb4016SJ. Bruce Fields 276221fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 276321fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 276421fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 276521fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 276621fb4016SJ. Bruce Fields return flags; 276721fb4016SJ. Bruce Fields } 276821fb4016SJ. Bruce Fields 27690c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27700c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2771f9d7562fSJ. Bruce Fields { 2772f9d7562fSJ. Bruce Fields __be32 status; 27730c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27740c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27750c12eaffSCasey Bodley 2776f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2777f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2778f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2779f9d7562fSJ. Bruce Fields if (status) 2780f9d7562fSJ. Bruce Fields return status; 2781f9d7562fSJ. Bruce Fields } 2782f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2783f9d7562fSJ. Bruce Fields 2784f9d7562fSJ. Bruce Fields return nfs_ok; 2785f9d7562fSJ. Bruce Fields } 2786f9d7562fSJ. Bruce Fields 2787b37ad28bSAl Viro static inline __be32 27881da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27891da177e4SLinus Torvalds struct nfsd4_open *open) 27901da177e4SLinus Torvalds { 27911da177e4SLinus Torvalds struct iattr iattr = { 27921da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27931da177e4SLinus Torvalds .ia_size = 0, 27941da177e4SLinus Torvalds }; 27951da177e4SLinus Torvalds if (!open->op_truncate) 27961da177e4SLinus Torvalds return 0; 27971da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27989246585aSAl Viro return nfserr_inval; 27991da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 28001da177e4SLinus Torvalds } 28011da177e4SLinus Torvalds 2802b37ad28bSAl Viro static __be32 2803dcef0413SJ. Bruce Fields nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) 28041da177e4SLinus Torvalds { 2805b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 28067d947842SJ. Bruce Fields bool new_access; 2807b37ad28bSAl Viro __be32 status; 28081da177e4SLinus Torvalds 280982c5ff1bSJeff Layton new_access = !test_access(op_share_access, stp); 2810f9d7562fSJ. Bruce Fields if (new_access) { 28110c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2812f9d7562fSJ. Bruce Fields if (status) 2813f9d7562fSJ. Bruce Fields return status; 28146c26d08fSJ. Bruce Fields } 28151da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 28161da177e4SLinus Torvalds if (status) { 2817f9d7562fSJ. Bruce Fields if (new_access) { 2818f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2819f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2820f9d7562fSJ. Bruce Fields } 28211da177e4SLinus Torvalds return status; 28221da177e4SLinus Torvalds } 28231da177e4SLinus Torvalds /* remember the open */ 282482c5ff1bSJeff Layton set_access(op_share_access, stp); 2825ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 28261da177e4SLinus Torvalds 28271da177e4SLinus Torvalds return nfs_ok; 28281da177e4SLinus Torvalds } 28291da177e4SLinus Torvalds 28301da177e4SLinus Torvalds 28311da177e4SLinus Torvalds static void 28321255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 28331da177e4SLinus Torvalds { 2834dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 28351da177e4SLinus Torvalds } 28361da177e4SLinus Torvalds 283714a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 283814a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 283914a24e99SJ. Bruce Fields { 284014a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 284114a24e99SJ. Bruce Fields return true; 284214a24e99SJ. Bruce Fields /* 284314a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 284414a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 284514a24e99SJ. Bruce Fields * until we hear otherwise: 284614a24e99SJ. Bruce Fields */ 284714a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 284814a24e99SJ. Bruce Fields } 284914a24e99SJ. Bruce Fields 285022d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 285122d38c4cSJ. Bruce Fields { 285222d38c4cSJ. Bruce Fields struct file_lock *fl; 285322d38c4cSJ. Bruce Fields 285422d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 285522d38c4cSJ. Bruce Fields if (!fl) 285622d38c4cSJ. Bruce Fields return NULL; 285722d38c4cSJ. Bruce Fields locks_init_lock(fl); 285822d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 285922d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 286022d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 286122d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2862acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 286322d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 286422d38c4cSJ. Bruce Fields return fl; 286522d38c4cSJ. Bruce Fields } 286622d38c4cSJ. Bruce Fields 2867edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2868edab9782SJ. Bruce Fields { 2869acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2870edab9782SJ. Bruce Fields struct file_lock *fl; 2871edab9782SJ. Bruce Fields int status; 2872edab9782SJ. Bruce Fields 2873edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2874edab9782SJ. Bruce Fields if (!fl) 2875edab9782SJ. Bruce Fields return -ENOMEM; 2876acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28772a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2878acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2879edab9782SJ. Bruce Fields if (status) { 2880acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2881edab9782SJ. Bruce Fields locks_free_lock(fl); 2882edab9782SJ. Bruce Fields return -ENOMEM; 2883edab9782SJ. Bruce Fields } 2884acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2885cb0942b8SAl Viro fp->fi_deleg_file = get_file(fl->fl_file); 2886acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2887acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2888acfdf5c3SJ. Bruce Fields return 0; 2889acfdf5c3SJ. Bruce Fields } 2890acfdf5c3SJ. Bruce Fields 2891acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2892acfdf5c3SJ. Bruce Fields { 2893acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2894acfdf5c3SJ. Bruce Fields 2895acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2896acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2897acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2898acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2899acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2900acfdf5c3SJ. Bruce Fields return -EAGAIN; 2901acfdf5c3SJ. Bruce Fields } 2902acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2903acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2904acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 29052a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2906edab9782SJ. Bruce Fields return 0; 2907edab9782SJ. Bruce Fields } 2908edab9782SJ. Bruce Fields 29094aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 29104aa8913cSBenny Halevy { 29114aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 29124aa8913cSBenny Halevy if (status == -EAGAIN) 29134aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 29144aa8913cSBenny Halevy else { 29154aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 29164aa8913cSBenny Halevy switch (open->op_deleg_want) { 29174aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 29184aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 29194aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 29204aa8913cSBenny Halevy break; 29214aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 29224aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 29234aa8913cSBenny Halevy break; 29244aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 29254aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 29264aa8913cSBenny Halevy } 29274aa8913cSBenny Halevy } 29284aa8913cSBenny Halevy } 29294aa8913cSBenny Halevy 29301da177e4SLinus Torvalds /* 29311da177e4SLinus Torvalds * Attempt to hand out a delegation. 29321da177e4SLinus Torvalds */ 29331da177e4SLinus Torvalds static void 29345ccb0066SStanislav Kinsbursky nfs4_open_delegation(struct net *net, struct svc_fh *fh, 29355ccb0066SStanislav Kinsbursky struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 29361da177e4SLinus Torvalds { 29371da177e4SLinus Torvalds struct nfs4_delegation *dp; 2938fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 293914a24e99SJ. Bruce Fields int cb_up; 2940d24433cdSBenny Halevy int status = 0, flag = 0; 29411da177e4SLinus Torvalds 2942fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 29431da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 29447b190fecSNeilBrown open->op_recall = 0; 29457b190fecSNeilBrown switch (open->op_claim_type) { 29467b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29472bf23875SJ. Bruce Fields if (!cb_up) 29487b190fecSNeilBrown open->op_recall = 1; 29497b190fecSNeilBrown flag = open->op_delegate_type; 29507b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29511da177e4SLinus Torvalds goto out; 29527b190fecSNeilBrown break; 29537b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29547b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29557b190fecSNeilBrown * had the chance to reclaim theirs.... */ 29565ccb0066SStanislav Kinsbursky if (locks_in_grace(net)) 29577b190fecSNeilBrown goto out; 2958dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29597b190fecSNeilBrown goto out; 29601da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29611da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29621da177e4SLinus Torvalds else 29631da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29647b190fecSNeilBrown break; 29657b190fecSNeilBrown default: 29667b190fecSNeilBrown goto out; 29677b190fecSNeilBrown } 29681da177e4SLinus Torvalds 2969fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2970dd239cc0SJ. Bruce Fields if (dp == NULL) 2971dd239cc0SJ. Bruce Fields goto out_no_deleg; 2972acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2973edab9782SJ. Bruce Fields if (status) 2974dd239cc0SJ. Bruce Fields goto out_free; 29751da177e4SLinus Torvalds 2976d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29771da177e4SLinus Torvalds 29788c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2979d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29801da177e4SLinus Torvalds out: 29811da177e4SLinus Torvalds open->op_delegate_type = flag; 2982d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2983d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2984d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2985d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2986d24433cdSBenny Halevy 29874aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29884aa8913cSBenny Halevy if (open->op_deleg_want) 29894aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2990d24433cdSBenny Halevy } 2991dd239cc0SJ. Bruce Fields return; 2992dd239cc0SJ. Bruce Fields out_free: 2993acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2994dd239cc0SJ. Bruce Fields out_no_deleg: 2995dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2996dd239cc0SJ. Bruce Fields goto out; 29971da177e4SLinus Torvalds } 29981da177e4SLinus Torvalds 2999e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 3000e27f49c3SBenny Halevy struct nfs4_delegation *dp) 3001e27f49c3SBenny Halevy { 3002e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 3003e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3004e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3005e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 3006e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 3007e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3008e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3009e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 3010e27f49c3SBenny Halevy } 3011e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 3012e27f49c3SBenny Halevy * it already has, therefore we don't return 3013e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 3014e27f49c3SBenny Halevy */ 3015e27f49c3SBenny Halevy } 3016e27f49c3SBenny Halevy 30171da177e4SLinus Torvalds /* 30181da177e4SLinus Torvalds * called with nfs4_lock_state() held. 30191da177e4SLinus Torvalds */ 3020b37ad28bSAl Viro __be32 30211da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 30221da177e4SLinus Torvalds { 30236668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 302438c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 30251da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 30261da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3027dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 3028567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 3029b37ad28bSAl Viro __be32 status; 30301da177e4SLinus Torvalds 30311da177e4SLinus Torvalds /* 30321da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 30331da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 30341da177e4SLinus Torvalds * If not found, create the nfs4_file struct 30351da177e4SLinus Torvalds */ 30361da177e4SLinus Torvalds fp = find_file(ino); 30371da177e4SLinus Torvalds if (fp) { 30381da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 30391da177e4SLinus Torvalds goto out; 304038c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 3041c44c5eebSNeilBrown if (status) 3042c44c5eebSNeilBrown goto out; 30431da177e4SLinus Torvalds } else { 3044c44c5eebSNeilBrown status = nfserr_bad_stateid; 30458b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3046c44c5eebSNeilBrown goto out; 30473e772463SJ. Bruce Fields status = nfserr_jukebox; 304832513b40SJ. Bruce Fields fp = open->op_file; 304932513b40SJ. Bruce Fields open->op_file = NULL; 305032513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30511da177e4SLinus Torvalds } 30521da177e4SLinus Torvalds 30531da177e4SLinus Torvalds /* 30541da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30551da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30561da177e4SLinus Torvalds */ 30571da177e4SLinus Torvalds if (stp) { 30581da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3059f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30601da177e4SLinus Torvalds if (status) 30611da177e4SLinus Torvalds goto out; 30621da177e4SLinus Torvalds } else { 30634cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3064567d9829SNeilBrown if (status) 30651da177e4SLinus Torvalds goto out; 30664af82504SJ. Bruce Fields status = nfsd4_truncate(rqstp, current_fh, open); 30674af82504SJ. Bruce Fields if (status) 30684af82504SJ. Bruce Fields goto out; 30694cdc951bSJ. Bruce Fields stp = open->op_stp; 30704cdc951bSJ. Bruce Fields open->op_stp = NULL; 3071996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30721da177e4SLinus Torvalds } 3073dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3074dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30751da177e4SLinus Torvalds 3076d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3077dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30786668958fSAndy Adamson 3079d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3080d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3081d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3082d24433cdSBenny Halevy goto nodeleg; 3083d24433cdSBenny Halevy } 3084d24433cdSBenny Halevy } 3085d24433cdSBenny Halevy 30861da177e4SLinus Torvalds /* 30871da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30881da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30891da177e4SLinus Torvalds */ 30905ccb0066SStanislav Kinsbursky nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); 3091d24433cdSBenny Halevy nodeleg: 30921da177e4SLinus Torvalds status = nfs_ok; 30931da177e4SLinus Torvalds 30948c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3095dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30961da177e4SLinus Torvalds out: 3097d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3098d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3099e27f49c3SBenny Halevy open->op_deleg_want) 3100e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3101d24433cdSBenny Halevy 310213cd2184SNeilBrown if (fp) 310313cd2184SNeilBrown put_nfs4_file(fp); 310437515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 31051255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 31061da177e4SLinus Torvalds /* 31071da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 31081da177e4SLinus Torvalds */ 31091da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3110dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 31116668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 31121da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 31131da177e4SLinus Torvalds 31141da177e4SLinus Torvalds return status; 31151da177e4SLinus Torvalds } 31161da177e4SLinus Torvalds 3117d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3118d29b20cdSJ. Bruce Fields { 3119d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3120d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3121d29b20cdSJ. Bruce Fields 3122d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3123d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3124d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3125d29b20cdSJ. Bruce Fields if (status) { 3126d29b20cdSJ. Bruce Fields release_openowner(oo); 3127d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3128d29b20cdSJ. Bruce Fields } else 3129d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3130d29b20cdSJ. Bruce Fields } 3131d29b20cdSJ. Bruce Fields } 313232513b40SJ. Bruce Fields if (open->op_file) 313332513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 31344cdc951bSJ. Bruce Fields if (open->op_stp) 3135ef79859eSJ. Bruce Fields free_generic_stateid(open->op_stp); 3136d29b20cdSJ. Bruce Fields } 3137d29b20cdSJ. Bruce Fields 3138b37ad28bSAl Viro __be32 3139b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3140b591480bSJ.Bruce Fields clientid_t *clid) 31411da177e4SLinus Torvalds { 31421da177e4SLinus Torvalds struct nfs4_client *clp; 3143b37ad28bSAl Viro __be32 status; 31447f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 31451da177e4SLinus Torvalds 31461da177e4SLinus Torvalds nfs4_lock_state(); 31471da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31481da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31491da177e4SLinus Torvalds status = nfserr_stale_clientid; 31502c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 31511da177e4SLinus Torvalds goto out; 31528daae4dcSStanislav Kinsbursky clp = find_confirmed_client(clid, cstate->minorversion, nn); 31531da177e4SLinus Torvalds status = nfserr_expired; 31541da177e4SLinus Torvalds if (clp == NULL) { 31551da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31561da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31571da177e4SLinus Torvalds goto out; 31581da177e4SLinus Torvalds } 31591da177e4SLinus Torvalds status = nfserr_cb_path_down; 3160ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 316177a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31621da177e4SLinus Torvalds goto out; 31631da177e4SLinus Torvalds status = nfs_ok; 31641da177e4SLinus Torvalds out: 31651da177e4SLinus Torvalds nfs4_unlock_state(); 31661da177e4SLinus Torvalds return status; 31671da177e4SLinus Torvalds } 31681da177e4SLinus Torvalds 3169a76b4319SNeilBrown static void 31705e1533c7SStanislav Kinsbursky nfsd4_end_grace(struct net *net) 3171a76b4319SNeilBrown { 31725e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 31735e1533c7SStanislav Kinsbursky 317433dcc481SJeff Layton /* do nothing if grace period already ended */ 3175a51c84edSStanislav Kinsbursky if (nn->grace_ended) 317633dcc481SJeff Layton return; 317733dcc481SJeff Layton 3178a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 3179a51c84edSStanislav Kinsbursky nn->grace_ended = true; 31802c142baaSStanislav Kinsbursky nfsd4_record_grace_done(net, nn->boot_time); 31815e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 3182e46b498cSJ. Bruce Fields /* 3183e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3184e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3185e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3186e46b498cSJ. Bruce Fields */ 3187e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3188a76b4319SNeilBrown } 3189a76b4319SNeilBrown 3190fd39ca9aSNeilBrown static time_t 31911da177e4SLinus Torvalds nfs4_laundromat(void) 31921da177e4SLinus Torvalds { 31931da177e4SLinus Torvalds struct nfs4_client *clp; 3194fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31951da177e4SLinus Torvalds struct nfs4_delegation *dp; 31961da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3197cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3198cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3199cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 32001da177e4SLinus Torvalds 32011da177e4SLinus Torvalds nfs4_lock_state(); 32021da177e4SLinus Torvalds 32031da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 32045e1533c7SStanislav Kinsbursky nfsd4_end_grace(&init_net); 320536acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 320636acb66bSBenny Halevy spin_lock(&client_lock); 32071da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 32081da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 32091da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 32101da177e4SLinus Torvalds t = clp->cl_time - cutoff; 32111da177e4SLinus Torvalds if (clientid_val > t) 32121da177e4SLinus Torvalds clientid_val = t; 32131da177e4SLinus Torvalds break; 32141da177e4SLinus Torvalds } 3215d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3216d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3217d7682988SBenny Halevy clp->cl_clientid.cl_id); 3218d7682988SBenny Halevy continue; 3219d7682988SBenny Halevy } 3220d7682988SBenny Halevy unhash_client_locked(clp); 3221d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 322236acb66bSBenny Halevy } 322336acb66bSBenny Halevy spin_unlock(&client_lock); 322436acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 322536acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 32261da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 32271da177e4SLinus Torvalds clp->cl_clientid.cl_id); 32281da177e4SLinus Torvalds expire_client(clp); 32291da177e4SLinus Torvalds } 32301da177e4SLinus Torvalds spin_lock(&recall_lock); 32311da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32321da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32331da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 32341da177e4SLinus Torvalds u = dp->dl_time - cutoff; 32351da177e4SLinus Torvalds if (test_val > u) 32361da177e4SLinus Torvalds test_val = u; 32371da177e4SLinus Torvalds break; 32381da177e4SLinus Torvalds } 32391da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32401da177e4SLinus Torvalds } 32411da177e4SLinus Torvalds spin_unlock(&recall_lock); 32421da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32431da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32441da177e4SLinus Torvalds unhash_delegation(dp); 32451da177e4SLinus Torvalds } 3246cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32471da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3248fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3249fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3250fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32511da177e4SLinus Torvalds if (test_val > u) 32521da177e4SLinus Torvalds test_val = u; 32531da177e4SLinus Torvalds break; 32541da177e4SLinus Torvalds } 3255fe0750e5SJ. Bruce Fields release_openowner(oo); 32561da177e4SLinus Torvalds } 32571da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32581da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32591da177e4SLinus Torvalds nfs4_unlock_state(); 32601da177e4SLinus Torvalds return clientid_val; 32611da177e4SLinus Torvalds } 32621da177e4SLinus Torvalds 3263a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3264a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3265a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3266a254b246SHarvey Harrison 3267a254b246SHarvey Harrison static void 3268c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32691da177e4SLinus Torvalds { 32701da177e4SLinus Torvalds time_t t; 32711da177e4SLinus Torvalds 32721da177e4SLinus Torvalds t = nfs4_laundromat(); 32731da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 327458da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32751da177e4SLinus Torvalds } 32761da177e4SLinus Torvalds 3277f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3278f8816512SNeilBrown { 3279f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3280f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3281f7a4d872SJ. Bruce Fields return nfs_ok; 32821da177e4SLinus Torvalds } 32831da177e4SLinus Torvalds 32841da177e4SLinus Torvalds static int 32852c142baaSStanislav Kinsbursky STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) 32861da177e4SLinus Torvalds { 32872c142baaSStanislav Kinsbursky if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) 3288e4e83ea4SJ. Bruce Fields return 0; 32898c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32908c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32911da177e4SLinus Torvalds return 1; 32921da177e4SLinus Torvalds } 32931da177e4SLinus Torvalds 32941da177e4SLinus Torvalds static inline int 329582c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 32961da177e4SLinus Torvalds { 329782c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 329882c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 329982c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 33001da177e4SLinus Torvalds } 33011da177e4SLinus Torvalds 33021da177e4SLinus Torvalds static inline int 330382c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 33041da177e4SLinus Torvalds { 330582c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 330682c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 33071da177e4SLinus Torvalds } 33081da177e4SLinus Torvalds 33091da177e4SLinus Torvalds static 3310dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 33111da177e4SLinus Torvalds { 3312b37ad28bSAl Viro __be32 status = nfserr_openmode; 33131da177e4SLinus Torvalds 331402921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 331502921914SJ. Bruce Fields if (stp->st_openstp) 331602921914SJ. Bruce Fields stp = stp->st_openstp; 331782c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 33181da177e4SLinus Torvalds goto out; 331982c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 33201da177e4SLinus Torvalds goto out; 33211da177e4SLinus Torvalds status = nfs_ok; 33221da177e4SLinus Torvalds out: 33231da177e4SLinus Torvalds return status; 33241da177e4SLinus Torvalds } 33251da177e4SLinus Torvalds 3326b37ad28bSAl Viro static inline __be32 33275ccb0066SStanislav Kinsbursky check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) 33281da177e4SLinus Torvalds { 3329203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 33301da177e4SLinus Torvalds return nfs_ok; 33315ccb0066SStanislav Kinsbursky else if (locks_in_grace(net)) { 333225985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 33331da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 33341da177e4SLinus Torvalds return nfserr_grace; 33351da177e4SLinus Torvalds } else if (flags & WR_STATE) 33361da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33371da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 33381da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 33391da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33401da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 33411da177e4SLinus Torvalds } 33421da177e4SLinus Torvalds 33431da177e4SLinus Torvalds /* 33441da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33451da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33461da177e4SLinus Torvalds */ 33471da177e4SLinus Torvalds static inline int 33485ccb0066SStanislav Kinsbursky grace_disallows_io(struct net *net, struct inode *inode) 33491da177e4SLinus Torvalds { 33505ccb0066SStanislav Kinsbursky return locks_in_grace(net) && mandatory_lock(inode); 33511da177e4SLinus Torvalds } 33521da177e4SLinus Torvalds 335381b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 335481b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 335581b82965SJ. Bruce Fields { 335681b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 335781b82965SJ. Bruce Fields } 335881b82965SJ. Bruce Fields 335957b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33600836f587SJ. Bruce Fields { 33616668958fSAndy Adamson /* 33626668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33636668958fSAndy Adamson * when it is zero. 33646668958fSAndy Adamson */ 336528dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 336681b82965SJ. Bruce Fields return nfs_ok; 336781b82965SJ. Bruce Fields 336881b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 336981b82965SJ. Bruce Fields return nfs_ok; 33706668958fSAndy Adamson 33710836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 337281b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33730836f587SJ. Bruce Fields return nfserr_bad_stateid; 33740836f587SJ. Bruce Fields /* 337581b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 337681b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 337781b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 337881b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 337981b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 338081b82965SJ. Bruce Fields * but better performance may result in retrying IO that 338181b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 338281b82965SJ. Bruce Fields * reordered in flight: 33830836f587SJ. Bruce Fields */ 33840836f587SJ. Bruce Fields return nfserr_old_stateid; 33850836f587SJ. Bruce Fields } 33860836f587SJ. Bruce Fields 33877df302f7SChuck Lever static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 338817456804SBryan Schumaker { 338997b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 339097b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 339197b7e3b6SJ. Bruce Fields __be32 status; 339217456804SBryan Schumaker 33937df302f7SChuck Lever if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 33947df302f7SChuck Lever return nfserr_bad_stateid; 33957df302f7SChuck Lever /* Client debugging aid. */ 33967df302f7SChuck Lever if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { 33977df302f7SChuck Lever char addr_str[INET6_ADDRSTRLEN]; 33987df302f7SChuck Lever rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, 33997df302f7SChuck Lever sizeof(addr_str)); 34007df302f7SChuck Lever pr_warn_ratelimited("NFSD: client %s testing state ID " 34017df302f7SChuck Lever "with incorrect client ID\n", addr_str); 34027df302f7SChuck Lever return nfserr_bad_stateid; 34037df302f7SChuck Lever } 340438c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 340597b7e3b6SJ. Bruce Fields if (!s) 34067df302f7SChuck Lever return nfserr_bad_stateid; 340736279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 340817456804SBryan Schumaker if (status) 340917456804SBryan Schumaker return status; 341097b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 341197b7e3b6SJ. Bruce Fields return nfs_ok; 341297b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 341397b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3414dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 341597b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 341697b7e3b6SJ. Bruce Fields return nfs_ok; 341717456804SBryan Schumaker } 341817456804SBryan Schumaker 3419d15c077eSJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s, bool sessions) 342038c2f4b1SJ. Bruce Fields { 342138c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 34222c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 342338c2f4b1SJ. Bruce Fields 342438c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 342538c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 34262c142baaSStanislav Kinsbursky if (STALE_STATEID(stateid, nn)) 342738c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 34288daae4dcSStanislav Kinsbursky cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions, nn); 342938c2f4b1SJ. Bruce Fields if (!cl) 343038c2f4b1SJ. Bruce Fields return nfserr_expired; 343138c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 343238c2f4b1SJ. Bruce Fields if (!*s) 343338c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 343438c2f4b1SJ. Bruce Fields return nfs_ok; 343538c2f4b1SJ. Bruce Fields 343638c2f4b1SJ. Bruce Fields } 343738c2f4b1SJ. Bruce Fields 34381da177e4SLinus Torvalds /* 34391da177e4SLinus Torvalds * Checks for stateid operations 34401da177e4SLinus Torvalds */ 3441b37ad28bSAl Viro __be32 34425ccb0066SStanislav Kinsbursky nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, 3443dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 34441da177e4SLinus Torvalds { 344569064a27SJ. Bruce Fields struct nfs4_stid *s; 3446dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34471da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3448dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34491da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3450b37ad28bSAl Viro __be32 status; 34511da177e4SLinus Torvalds 34521da177e4SLinus Torvalds if (filpp) 34531da177e4SLinus Torvalds *filpp = NULL; 34541da177e4SLinus Torvalds 34555ccb0066SStanislav Kinsbursky if (grace_disallows_io(net, ino)) 34561da177e4SLinus Torvalds return nfserr_grace; 34571da177e4SLinus Torvalds 34581da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34595ccb0066SStanislav Kinsbursky return check_special_stateids(net, current_fh, stateid, flags); 34601da177e4SLinus Torvalds 3461d15c077eSJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s, cstate->minorversion); 346238c2f4b1SJ. Bruce Fields if (status) 346338c2f4b1SJ. Bruce Fields return status; 346469064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34650c2a498fSJ. Bruce Fields if (status) 34660c2a498fSJ. Bruce Fields goto out; 3467f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3468f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 346969064a27SJ. Bruce Fields dp = delegstateid(s); 3470dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3471dc9bf700SJ. Bruce Fields if (status) 3472dc9bf700SJ. Bruce Fields goto out; 347343b0178eSDan Carpenter if (filpp) { 3474acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3475f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 347643b0178eSDan Carpenter } 3477f7a4d872SJ. Bruce Fields break; 3478f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3479f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 348069064a27SJ. Bruce Fields stp = openlockstateid(s); 3481f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3482f7a4d872SJ. Bruce Fields if (status) 34831da177e4SLinus Torvalds goto out; 3484fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3485dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34861da177e4SLinus Torvalds goto out; 3487a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3488a4455be0SJ. Bruce Fields if (status) 34891da177e4SLinus Torvalds goto out; 3490f9d7562fSJ. Bruce Fields if (filpp) { 3491f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3492f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3493f9d7562fSJ. Bruce Fields else 3494f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3495f9d7562fSJ. Bruce Fields } 3496f7a4d872SJ. Bruce Fields break; 3497f7a4d872SJ. Bruce Fields default: 3498f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 34991da177e4SLinus Torvalds } 35001da177e4SLinus Torvalds status = nfs_ok; 35011da177e4SLinus Torvalds out: 35021da177e4SLinus Torvalds return status; 35031da177e4SLinus Torvalds } 35041da177e4SLinus Torvalds 3505e1ca12dfSBryan Schumaker static __be32 3506dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3507e1ca12dfSBryan Schumaker { 3508fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3509e1ca12dfSBryan Schumaker return nfserr_locks_held; 3510e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3511e1ca12dfSBryan Schumaker return nfs_ok; 3512e1ca12dfSBryan Schumaker } 3513e1ca12dfSBryan Schumaker 3514e1ca12dfSBryan Schumaker /* 351517456804SBryan Schumaker * Test if the stateid is valid 351617456804SBryan Schumaker */ 351717456804SBryan Schumaker __be32 351817456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 351917456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 352017456804SBryan Schumaker { 352103cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 352203cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 352303cfb420SBryan Schumaker 352403cfb420SBryan Schumaker nfs4_lock_state(); 352503cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 35267df302f7SChuck Lever stateid->ts_id_status = 35277df302f7SChuck Lever nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); 352803cfb420SBryan Schumaker nfs4_unlock_state(); 352903cfb420SBryan Schumaker 353017456804SBryan Schumaker return nfs_ok; 353117456804SBryan Schumaker } 353217456804SBryan Schumaker 3533e1ca12dfSBryan Schumaker __be32 3534e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3535e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3536e1ca12dfSBryan Schumaker { 3537e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 35382da1cec7SJ. Bruce Fields struct nfs4_stid *s; 353938c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 35402da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3541e1ca12dfSBryan Schumaker 3542e1ca12dfSBryan Schumaker nfs4_lock_state(); 354338c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 35442da1cec7SJ. Bruce Fields if (!s) 3545e1ca12dfSBryan Schumaker goto out; 35462da1cec7SJ. Bruce Fields switch (s->sc_type) { 35472da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3548e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3549e1ca12dfSBryan Schumaker goto out; 35502da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35512da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35522da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35532da1cec7SJ. Bruce Fields if (ret) 3554e1ca12dfSBryan Schumaker goto out; 35552da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35562da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35572da1cec7SJ. Bruce Fields else 35582da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3559f7a4d872SJ. Bruce Fields break; 3560f7a4d872SJ. Bruce Fields default: 3561f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3562e1ca12dfSBryan Schumaker } 3563e1ca12dfSBryan Schumaker out: 3564e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3565e1ca12dfSBryan Schumaker return ret; 3566e1ca12dfSBryan Schumaker } 3567e1ca12dfSBryan Schumaker 35684c4cd222SNeilBrown static inline int 35694c4cd222SNeilBrown setlkflg (int type) 35704c4cd222SNeilBrown { 35714c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35724c4cd222SNeilBrown RD_STATE : WR_STATE; 35734c4cd222SNeilBrown } 35741da177e4SLinus Torvalds 3575dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3576c0a5d93eSJ. Bruce Fields { 3577c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3578c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3579c0a5d93eSJ. Bruce Fields __be32 status; 3580c0a5d93eSJ. Bruce Fields 3581c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3582c0a5d93eSJ. Bruce Fields if (status) 3583c0a5d93eSJ. Bruce Fields return status; 3584f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3585f7a4d872SJ. Bruce Fields /* 3586f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3587f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3588f7a4d872SJ. Bruce Fields */ 3589f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3590f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3591f7a4d872SJ. Bruce Fields if (status) 3592f7a4d872SJ. Bruce Fields return status; 3593f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3594c0a5d93eSJ. Bruce Fields } 3595c0a5d93eSJ. Bruce Fields 35961da177e4SLinus Torvalds /* 35971da177e4SLinus Torvalds * Checks for sequence id mutating operations. 35981da177e4SLinus Torvalds */ 3599b37ad28bSAl Viro static __be32 3600dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 36012288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3602dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 36031da177e4SLinus Torvalds { 36040836f587SJ. Bruce Fields __be32 status; 360538c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 36061da177e4SLinus Torvalds 36078c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 36088c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 36091da177e4SLinus Torvalds 36101da177e4SLinus Torvalds *stpp = NULL; 3611d15c077eSJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s, cstate->minorversion); 3612c0a5d93eSJ. Bruce Fields if (status) 3613c0a5d93eSJ. Bruce Fields return status; 361438c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3615c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 36161da177e4SLinus Torvalds 3617c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 36181da177e4SLinus Torvalds } 36191da177e4SLinus Torvalds 3620dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3621c0a5d93eSJ. Bruce Fields { 3622c0a5d93eSJ. Bruce Fields __be32 status; 3623c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 36241da177e4SLinus Torvalds 3625c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 36262288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 36270836f587SJ. Bruce Fields if (status) 36280836f587SJ. Bruce Fields return status; 3629c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3630dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3631c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 36323a4f98bbSNeilBrown return nfs_ok; 36331da177e4SLinus Torvalds } 36341da177e4SLinus Torvalds 3635b37ad28bSAl Viro __be32 3636ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3637a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 36381da177e4SLinus Torvalds { 3639b37ad28bSAl Viro __be32 status; 3640fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3641dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36421da177e4SLinus Torvalds 36431da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3644ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3645ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36461da177e4SLinus Torvalds 3647ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3648a8cddc5dSJ. Bruce Fields if (status) 3649a8cddc5dSJ. Bruce Fields return status; 36501da177e4SLinus Torvalds 36511da177e4SLinus Torvalds nfs4_lock_state(); 36521da177e4SLinus Torvalds 36539072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3654ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36552288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36569072d5c6SJ. Bruce Fields if (status) 36571da177e4SLinus Torvalds goto out; 3658fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 365968b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3660dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 366168b66e82SJ. Bruce Fields goto out; 3662dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3663dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3664dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36658c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3666dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3667c7b9a459SNeilBrown 36682a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 366968b66e82SJ. Bruce Fields status = nfs_ok; 36701da177e4SLinus Torvalds out: 36715ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36721da177e4SLinus Torvalds nfs4_unlock_state(); 36731da177e4SLinus Torvalds return status; 36741da177e4SLinus Torvalds } 36751da177e4SLinus Torvalds 36766409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36771da177e4SLinus Torvalds { 367882c5ff1bSJeff Layton if (!test_access(access, stp)) 36796409a5a6SJ. Bruce Fields return; 36806409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 368182c5ff1bSJeff Layton clear_access(access, stp); 3682f197c271SJ. Bruce Fields } 36836409a5a6SJ. Bruce Fields 36846409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36856409a5a6SJ. Bruce Fields { 36866409a5a6SJ. Bruce Fields switch (to_access) { 36876409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36886409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36896409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36906409a5a6SJ. Bruce Fields break; 36916409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36926409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36936409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36946409a5a6SJ. Bruce Fields break; 36956409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36966409a5a6SJ. Bruce Fields break; 36976409a5a6SJ. Bruce Fields default: 36986409a5a6SJ. Bruce Fields BUG(); 36991da177e4SLinus Torvalds } 37001da177e4SLinus Torvalds } 37011da177e4SLinus Torvalds 37021da177e4SLinus Torvalds static void 3703ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 37041da177e4SLinus Torvalds { 37051da177e4SLinus Torvalds int i; 37061da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 37071da177e4SLinus Torvalds if ((i & deny) != i) 3708ce0fc43cSJeff Layton clear_deny(i, stp); 37091da177e4SLinus Torvalds } 37101da177e4SLinus Torvalds } 37111da177e4SLinus Torvalds 3712b37ad28bSAl Viro __be32 3713ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3714ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3715a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 37161da177e4SLinus Torvalds { 3717b37ad28bSAl Viro __be32 status; 3718dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37191da177e4SLinus Torvalds 37201da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3721ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3722ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37231da177e4SLinus Torvalds 3724c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 37252c8bd7e0SBenny Halevy if (od->od_deleg_want) 37262c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 37272c8bd7e0SBenny Halevy od->od_deleg_want); 37281da177e4SLinus Torvalds 37291da177e4SLinus Torvalds nfs4_lock_state(); 3730c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3731c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 37329072d5c6SJ. Bruce Fields if (status) 37331da177e4SLinus Torvalds goto out; 37341da177e4SLinus Torvalds status = nfserr_inval; 373582c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 37361da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 37371da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 37381da177e4SLinus Torvalds goto out; 37391da177e4SLinus Torvalds } 3740ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 37411da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 37421da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 37431da177e4SLinus Torvalds goto out; 37441da177e4SLinus Torvalds } 37456409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37461da177e4SLinus Torvalds 3747ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 37481da177e4SLinus Torvalds 3749dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3750dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37511da177e4SLinus Torvalds status = nfs_ok; 37521da177e4SLinus Torvalds out: 37535ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37541da177e4SLinus Torvalds nfs4_unlock_state(); 37551da177e4SLinus Torvalds return status; 37561da177e4SLinus Torvalds } 37571da177e4SLinus Torvalds 375838c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 375938c387b5SJ. Bruce Fields { 376038c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 376138c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 376238c387b5SJ. Bruce Fields 376338c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 376438c387b5SJ. Bruce Fields return; 376538c387b5SJ. Bruce Fields oo = openowner(so); 376638c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 376738c387b5SJ. Bruce Fields if (!s) 376838c387b5SJ. Bruce Fields return; 376938c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 377038c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 377138c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 377238c387b5SJ. Bruce Fields return; 377338c387b5SJ. Bruce Fields } 377438c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3775f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3776f7a4d872SJ. Bruce Fields } 3777f7a4d872SJ. Bruce Fields 3778f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3779f7a4d872SJ. Bruce Fields { 3780f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3781f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 378238c387b5SJ. Bruce Fields } 378338c387b5SJ. Bruce Fields 37841da177e4SLinus Torvalds /* 37851da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37861da177e4SLinus Torvalds */ 3787b37ad28bSAl Viro __be32 3788ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3789a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37901da177e4SLinus Torvalds { 3791b37ad28bSAl Viro __be32 status; 3792fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3793dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37941da177e4SLinus Torvalds 37951da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3796ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3797ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37981da177e4SLinus Torvalds 37991da177e4SLinus Torvalds nfs4_lock_state(); 3800f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3801f7a4d872SJ. Bruce Fields &close->cl_stateid, 3802f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3803f7a4d872SJ. Bruce Fields &stp); 38049072d5c6SJ. Bruce Fields if (status) 38051da177e4SLinus Torvalds goto out; 3806fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 38071da177e4SLinus Torvalds status = nfs_ok; 3808dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3809dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 38101da177e4SLinus Torvalds 3811f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 3812cf9182e9SJ. Bruce Fields release_last_closed_stateid(oo); 381338c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 381404ef5954SJ. Bruce Fields 381574dbafafSJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) { 381674dbafafSJ. Bruce Fields if (cstate->minorversion) { 381774dbafafSJ. Bruce Fields release_openowner(oo); 381874dbafafSJ. Bruce Fields cstate->replay_owner = NULL; 381974dbafafSJ. Bruce Fields } else { 382074dbafafSJ. Bruce Fields /* 382174dbafafSJ. Bruce Fields * In the 4.0 case we need to keep the owners around a 382274dbafafSJ. Bruce Fields * little while to handle CLOSE replay. 382304ef5954SJ. Bruce Fields */ 3824fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3825fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 382674dbafafSJ. Bruce Fields } 382774dbafafSJ. Bruce Fields } 38281da177e4SLinus Torvalds out: 38295ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 38301da177e4SLinus Torvalds nfs4_unlock_state(); 38311da177e4SLinus Torvalds return status; 38321da177e4SLinus Torvalds } 38331da177e4SLinus Torvalds 3834b37ad28bSAl Viro __be32 3835ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3836ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 38371da177e4SLinus Torvalds { 3838203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3839203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 384038c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3841b37ad28bSAl Viro __be32 status; 38421da177e4SLinus Torvalds 3843ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3844203a8c8eSJ. Bruce Fields return status; 38451da177e4SLinus Torvalds 38461da177e4SLinus Torvalds nfs4_lock_state(); 3847d15c077eSJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion); 384838c2f4b1SJ. Bruce Fields if (status) 3849203a8c8eSJ. Bruce Fields goto out; 385038c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3851d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3852203a8c8eSJ. Bruce Fields if (status) 3853203a8c8eSJ. Bruce Fields goto out; 3854203a8c8eSJ. Bruce Fields 3855203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38561da177e4SLinus Torvalds out: 3857203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3858203a8c8eSJ. Bruce Fields 38591da177e4SLinus Torvalds return status; 38601da177e4SLinus Torvalds } 38611da177e4SLinus Torvalds 38621da177e4SLinus Torvalds 38631da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38641da177e4SLinus Torvalds 3865009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38661da177e4SLinus Torvalds 386787df4de8SBenny Halevy static inline u64 386887df4de8SBenny Halevy end_offset(u64 start, u64 len) 386987df4de8SBenny Halevy { 387087df4de8SBenny Halevy u64 end; 387187df4de8SBenny Halevy 387287df4de8SBenny Halevy end = start + len; 387387df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 387487df4de8SBenny Halevy } 387587df4de8SBenny Halevy 387687df4de8SBenny Halevy /* last octet in a range */ 387787df4de8SBenny Halevy static inline u64 387887df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 387987df4de8SBenny Halevy { 388087df4de8SBenny Halevy u64 end; 388187df4de8SBenny Halevy 388287df4de8SBenny Halevy BUG_ON(!len); 388387df4de8SBenny Halevy end = start + len; 388487df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 388587df4de8SBenny Halevy } 388687df4de8SBenny Halevy 3887009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38881da177e4SLinus Torvalds { 38891da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38901da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3891009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38921da177e4SLinus Torvalds } 38931da177e4SLinus Torvalds 38941da177e4SLinus Torvalds /* 38951da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38961da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38971da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38981da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38991da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 39001da177e4SLinus Torvalds * the VFS, but this is a very deep change! 39011da177e4SLinus Torvalds */ 39021da177e4SLinus Torvalds static inline void 39031da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 39041da177e4SLinus Torvalds { 39051da177e4SLinus Torvalds if (lock->fl_start < 0) 39061da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 39071da177e4SLinus Torvalds if (lock->fl_end < 0) 39081da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 39091da177e4SLinus Torvalds } 39101da177e4SLinus Torvalds 3911d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3912d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 39137b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3914d5b9026aSNeilBrown }; 39151da177e4SLinus Torvalds 39161da177e4SLinus Torvalds static inline void 39171da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 39181da177e4SLinus Torvalds { 3919fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39201da177e4SLinus Torvalds 3921d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3922fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3923fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3924fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 39257c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 39267c13f344SJ. Bruce Fields /* We just don't care that much */ 39277c13f344SJ. Bruce Fields goto nevermind; 3928fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3929fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3930d5b9026aSNeilBrown } else { 39317c13f344SJ. Bruce Fields nevermind: 39327c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 39337c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3934d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3935d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 39361da177e4SLinus Torvalds } 39371da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 393887df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 393987df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 39401da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39411da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39421da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39431da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39441da177e4SLinus Torvalds } 39451da177e4SLinus Torvalds 3946b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3947b93d87c1SJ. Bruce Fields { 3948b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3949b93d87c1SJ. Bruce Fields 3950b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3951b93d87c1SJ. Bruce Fields return false; 3952b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3953b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3954b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3955b93d87c1SJ. Bruce Fields } 3956b93d87c1SJ. Bruce Fields 3957fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3958fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 395920e9e2bcSStanislav Kinsbursky struct xdr_netobj *owner, struct nfsd_net *nn) 39601da177e4SLinus Torvalds { 3961009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3962b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39631da177e4SLinus Torvalds 396420e9e2bcSStanislav Kinsbursky list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3965b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3966b93d87c1SJ. Bruce Fields return lo; 39671da177e4SLinus Torvalds } 39681da177e4SLinus Torvalds return NULL; 39691da177e4SLinus Torvalds } 39701da177e4SLinus Torvalds 3971dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3972ff194bd9SJ. Bruce Fields { 3973009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3974009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3975009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 39769b531137SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 3977009673b4SJ. Bruce Fields 39789b531137SStanislav Kinsbursky list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); 397920e9e2bcSStanislav Kinsbursky list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); 3980fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3981ff194bd9SJ. Bruce Fields } 3982ff194bd9SJ. Bruce Fields 39831da177e4SLinus Torvalds /* 39841da177e4SLinus Torvalds * Alloc a lock owner structure. 39851da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 398625985edcSLucas De Marchi * occurred. 39871da177e4SLinus Torvalds * 398816bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39891da177e4SLinus Torvalds */ 39901da177e4SLinus Torvalds 3991fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3992dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3993fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39941da177e4SLinus Torvalds 3995fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3996fe0750e5SJ. Bruce Fields if (!lo) 39971da177e4SLinus Torvalds return NULL; 3998fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3999fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 4000b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 4001b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 4002fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 4003fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 4004fe0750e5SJ. Bruce Fields return lo; 40051da177e4SLinus Torvalds } 40061da177e4SLinus Torvalds 4007dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 4008dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 40091da177e4SLinus Torvalds { 4010dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 4011d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 40121da177e4SLinus Torvalds 4013996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 40145ac049acSNeilBrown if (stp == NULL) 40156136d2b4SJ. Bruce Fields return NULL; 4016996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 40178beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 4018fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 4019fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 402013cd2184SNeilBrown get_nfs4_file(fp); 40211da177e4SLinus Torvalds stp->st_file = fp; 40220997b173SJ. Bruce Fields stp->st_access_bmap = 0; 40231da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 40244c4cd222SNeilBrown stp->st_openstp = open_stp; 40251da177e4SLinus Torvalds return stp; 40261da177e4SLinus Torvalds } 40271da177e4SLinus Torvalds 4028fd39ca9aSNeilBrown static int 40291da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 40301da177e4SLinus Torvalds { 403187df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 40321da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 40331da177e4SLinus Torvalds } 40341da177e4SLinus Torvalds 4035dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 40360997b173SJ. Bruce Fields { 40370997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 40380997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 40390997b173SJ. Bruce Fields 404082c5ff1bSJeff Layton if (test_access(access, lock_stp)) 40410997b173SJ. Bruce Fields return; 40420997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 404382c5ff1bSJeff Layton set_access(access, lock_stp); 40440997b173SJ. Bruce Fields } 40450997b173SJ. Bruce Fields 40462355c596SJ. Bruce Fields static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new) 404764a284d0SJ. Bruce Fields { 404864a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 404964a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 405064a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 405164a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 405264a284d0SJ. Bruce Fields unsigned int strhashval; 405320e9e2bcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); 405464a284d0SJ. Bruce Fields 405520e9e2bcSStanislav Kinsbursky lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, 405620e9e2bcSStanislav Kinsbursky &lock->v.new.owner, nn); 405764a284d0SJ. Bruce Fields if (lo) { 405864a284d0SJ. Bruce Fields if (!cstate->minorversion) 405964a284d0SJ. Bruce Fields return nfserr_bad_seqid; 406064a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 406164a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 406264a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 406364a284d0SJ. Bruce Fields return nfs_ok; 406464a284d0SJ. Bruce Fields } 406516bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 406664a284d0SJ. Bruce Fields &lock->v.new.owner); 406764a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 406864a284d0SJ. Bruce Fields if (lo == NULL) 406964a284d0SJ. Bruce Fields return nfserr_jukebox; 407064a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 407164a284d0SJ. Bruce Fields if (*lst == NULL) { 407264a284d0SJ. Bruce Fields release_lockowner(lo); 407364a284d0SJ. Bruce Fields return nfserr_jukebox; 407464a284d0SJ. Bruce Fields } 407564a284d0SJ. Bruce Fields *new = true; 407664a284d0SJ. Bruce Fields return nfs_ok; 407764a284d0SJ. Bruce Fields } 407864a284d0SJ. Bruce Fields 40791da177e4SLinus Torvalds /* 40801da177e4SLinus Torvalds * LOCK operation 40811da177e4SLinus Torvalds */ 4082b37ad28bSAl Viro __be32 4083ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4084a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40851da177e4SLinus Torvalds { 4086fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4087fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4088dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40897d947842SJ. Bruce Fields struct file *filp = NULL; 409021179d81SJeff Layton struct file_lock *file_lock = NULL; 409121179d81SJeff Layton struct file_lock *conflock = NULL; 4092b37ad28bSAl Viro __be32 status = 0; 409364a284d0SJ. Bruce Fields bool new_state = false; 4094b34f27aaSJ. Bruce Fields int lkflg; 4095b8dd7b9aSAl Viro int err; 40967f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 40971da177e4SLinus Torvalds 40981da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40991da177e4SLinus Torvalds (long long) lock->lk_offset, 41001da177e4SLinus Torvalds (long long) lock->lk_length); 41011da177e4SLinus Torvalds 41021da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 41031da177e4SLinus Torvalds return nfserr_inval; 41041da177e4SLinus Torvalds 4105ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 41068837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4107a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4108a6f6ef2fSAndy Adamson return status; 4109a6f6ef2fSAndy Adamson } 4110a6f6ef2fSAndy Adamson 41111da177e4SLinus Torvalds nfs4_lock_state(); 41121da177e4SLinus Torvalds 41131da177e4SLinus Torvalds if (lock->lk_is_new) { 4114dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 41151da177e4SLinus Torvalds 4116684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4117684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4118684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4119684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4120684e5638SJ. Bruce Fields sizeof(clientid_t)); 4121684e5638SJ. Bruce Fields 41221da177e4SLinus Torvalds status = nfserr_stale_clientid; 41232c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) 41241da177e4SLinus Torvalds goto out; 41251da177e4SLinus Torvalds 41261da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4127c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 41281da177e4SLinus Torvalds lock->lk_new_open_seqid, 41291da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4130c0a5d93eSJ. Bruce Fields &open_stp); 413137515177SNeilBrown if (status) 41321da177e4SLinus Torvalds goto out; 4133fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4134b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4135684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4136b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4137b34f27aaSJ. Bruce Fields goto out; 413864a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 413964a284d0SJ. Bruce Fields &lock_stp, &new_state); 4140e1aaa891SJ. Bruce Fields } else 4141dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 41421da177e4SLinus Torvalds lock->lk_old_lock_seqid, 41431da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41442288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 41451da177e4SLinus Torvalds if (status) 41461da177e4SLinus Torvalds goto out; 4147fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41481da177e4SLinus Torvalds 4149b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4150b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4151b34f27aaSJ. Bruce Fields if (status) 4152b34f27aaSJ. Bruce Fields goto out; 4153b34f27aaSJ. Bruce Fields 41540dd395dcSNeilBrown status = nfserr_grace; 41555ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) 41560dd395dcSNeilBrown goto out; 41570dd395dcSNeilBrown status = nfserr_no_grace; 41585ccb0066SStanislav Kinsbursky if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) 41590dd395dcSNeilBrown goto out; 41600dd395dcSNeilBrown 416121179d81SJeff Layton file_lock = locks_alloc_lock(); 416221179d81SJeff Layton if (!file_lock) { 416321179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 416421179d81SJeff Layton status = nfserr_jukebox; 416521179d81SJeff Layton goto out; 416621179d81SJeff Layton } 416721179d81SJeff Layton 416821179d81SJeff Layton locks_init_lock(file_lock); 41691da177e4SLinus Torvalds switch (lock->lk_type) { 41701da177e4SLinus Torvalds case NFS4_READ_LT: 41711da177e4SLinus Torvalds case NFS4_READW_LT: 4172f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41730997b173SJ. Bruce Fields if (filp) 41740997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 417521179d81SJeff Layton file_lock->fl_type = F_RDLCK; 41761da177e4SLinus Torvalds break; 41771da177e4SLinus Torvalds case NFS4_WRITE_LT: 41781da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4179f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41800997b173SJ. Bruce Fields if (filp) 41810997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 418221179d81SJeff Layton file_lock->fl_type = F_WRLCK; 41831da177e4SLinus Torvalds break; 41841da177e4SLinus Torvalds default: 41851da177e4SLinus Torvalds status = nfserr_inval; 41861da177e4SLinus Torvalds goto out; 41871da177e4SLinus Torvalds } 4188f9d7562fSJ. Bruce Fields if (!filp) { 4189f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4190f9d7562fSJ. Bruce Fields goto out; 4191f9d7562fSJ. Bruce Fields } 419221179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lock_sop; 419321179d81SJeff Layton file_lock->fl_pid = current->tgid; 419421179d81SJeff Layton file_lock->fl_file = filp; 419521179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 419621179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 419721179d81SJeff Layton file_lock->fl_start = lock->lk_offset; 419821179d81SJeff Layton file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 419921179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 42001da177e4SLinus Torvalds 420121179d81SJeff Layton conflock = locks_alloc_lock(); 420221179d81SJeff Layton if (!conflock) { 420321179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 420421179d81SJeff Layton status = nfserr_jukebox; 420521179d81SJeff Layton goto out; 420621179d81SJeff Layton } 42071da177e4SLinus Torvalds 420821179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); 4209b8dd7b9aSAl Viro switch (-err) { 42101da177e4SLinus Torvalds case 0: /* success! */ 4211dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4212dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 42131da177e4SLinus Torvalds sizeof(stateid_t)); 4214b8dd7b9aSAl Viro status = 0; 4215eb76b3fdSAndy Adamson break; 4216eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4217eb76b3fdSAndy Adamson status = nfserr_denied; 4218eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 421921179d81SJeff Layton nfs4_set_lock_denied(conflock, &lock->lk_denied); 4220eb76b3fdSAndy Adamson break; 42211da177e4SLinus Torvalds case (EDEADLK): 42221da177e4SLinus Torvalds status = nfserr_deadlock; 4223eb76b3fdSAndy Adamson break; 42241da177e4SLinus Torvalds default: 4225fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 42263e772463SJ. Bruce Fields status = nfserrno(err); 4227eb76b3fdSAndy Adamson break; 42281da177e4SLinus Torvalds } 42291da177e4SLinus Torvalds out: 423064a284d0SJ. Bruce Fields if (status && new_state) 4231f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 42325ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 42331da177e4SLinus Torvalds nfs4_unlock_state(); 423421179d81SJeff Layton if (file_lock) 423521179d81SJeff Layton locks_free_lock(file_lock); 423621179d81SJeff Layton if (conflock) 423721179d81SJeff Layton locks_free_lock(conflock); 42381da177e4SLinus Torvalds return status; 42391da177e4SLinus Torvalds } 42401da177e4SLinus Torvalds 42411da177e4SLinus Torvalds /* 424255ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 424355ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 424455ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 424555ef1274SJ. Bruce Fields * inode operation.) 424655ef1274SJ. Bruce Fields */ 424704da6e9dSAl Viro static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 424855ef1274SJ. Bruce Fields { 424955ef1274SJ. Bruce Fields struct file *file; 425004da6e9dSAl Viro __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 425104da6e9dSAl Viro if (!err) { 425204da6e9dSAl Viro err = nfserrno(vfs_test_lock(file, lock)); 425355ef1274SJ. Bruce Fields nfsd_close(file); 425404da6e9dSAl Viro } 425555ef1274SJ. Bruce Fields return err; 425655ef1274SJ. Bruce Fields } 425755ef1274SJ. Bruce Fields 425855ef1274SJ. Bruce Fields /* 42591da177e4SLinus Torvalds * LOCKT operation 42601da177e4SLinus Torvalds */ 4261b37ad28bSAl Viro __be32 4262ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4263ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42641da177e4SLinus Torvalds { 42651da177e4SLinus Torvalds struct inode *inode; 426621179d81SJeff Layton struct file_lock *file_lock = NULL; 4267fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4268b37ad28bSAl Viro __be32 status; 42697f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 42701da177e4SLinus Torvalds 42715ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp))) 42721da177e4SLinus Torvalds return nfserr_grace; 42731da177e4SLinus Torvalds 42741da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42751da177e4SLinus Torvalds return nfserr_inval; 42761da177e4SLinus Torvalds 42771da177e4SLinus Torvalds nfs4_lock_state(); 42781da177e4SLinus Torvalds 42791da177e4SLinus Torvalds status = nfserr_stale_clientid; 42802c142baaSStanislav Kinsbursky if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) 42811da177e4SLinus Torvalds goto out; 42821da177e4SLinus Torvalds 428375c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42841da177e4SLinus Torvalds goto out; 42851da177e4SLinus Torvalds 4286ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 428721179d81SJeff Layton file_lock = locks_alloc_lock(); 428821179d81SJeff Layton if (!file_lock) { 428921179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 429021179d81SJeff Layton status = nfserr_jukebox; 429121179d81SJeff Layton goto out; 429221179d81SJeff Layton } 429321179d81SJeff Layton locks_init_lock(file_lock); 42941da177e4SLinus Torvalds switch (lockt->lt_type) { 42951da177e4SLinus Torvalds case NFS4_READ_LT: 42961da177e4SLinus Torvalds case NFS4_READW_LT: 429721179d81SJeff Layton file_lock->fl_type = F_RDLCK; 42981da177e4SLinus Torvalds break; 42991da177e4SLinus Torvalds case NFS4_WRITE_LT: 43001da177e4SLinus Torvalds case NFS4_WRITEW_LT: 430121179d81SJeff Layton file_lock->fl_type = F_WRLCK; 43021da177e4SLinus Torvalds break; 43031da177e4SLinus Torvalds default: 43042fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 43051da177e4SLinus Torvalds status = nfserr_inval; 43061da177e4SLinus Torvalds goto out; 43071da177e4SLinus Torvalds } 43081da177e4SLinus Torvalds 430920e9e2bcSStanislav Kinsbursky lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); 4310fe0750e5SJ. Bruce Fields if (lo) 431121179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lo; 431221179d81SJeff Layton file_lock->fl_pid = current->tgid; 431321179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 43141da177e4SLinus Torvalds 431521179d81SJeff Layton file_lock->fl_start = lockt->lt_offset; 431621179d81SJeff Layton file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 43171da177e4SLinus Torvalds 431821179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 43191da177e4SLinus Torvalds 432021179d81SJeff Layton status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); 432104da6e9dSAl Viro if (status) 4322fd85b817SMarc Eshel goto out; 432304da6e9dSAl Viro 432421179d81SJeff Layton if (file_lock->fl_type != F_UNLCK) { 43251da177e4SLinus Torvalds status = nfserr_denied; 432621179d81SJeff Layton nfs4_set_lock_denied(file_lock, &lockt->lt_denied); 43271da177e4SLinus Torvalds } 43281da177e4SLinus Torvalds out: 43291da177e4SLinus Torvalds nfs4_unlock_state(); 433021179d81SJeff Layton if (file_lock) 433121179d81SJeff Layton locks_free_lock(file_lock); 43321da177e4SLinus Torvalds return status; 43331da177e4SLinus Torvalds } 43341da177e4SLinus Torvalds 4335b37ad28bSAl Viro __be32 4336ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4337a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 43381da177e4SLinus Torvalds { 4339dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43401da177e4SLinus Torvalds struct file *filp = NULL; 434121179d81SJeff Layton struct file_lock *file_lock = NULL; 4342b37ad28bSAl Viro __be32 status; 4343b8dd7b9aSAl Viro int err; 43441da177e4SLinus Torvalds 43451da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 43461da177e4SLinus Torvalds (long long) locku->lu_offset, 43471da177e4SLinus Torvalds (long long) locku->lu_length); 43481da177e4SLinus Torvalds 43491da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 43501da177e4SLinus Torvalds return nfserr_inval; 43511da177e4SLinus Torvalds 43521da177e4SLinus Torvalds nfs4_lock_state(); 43531da177e4SLinus Torvalds 43549072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 43552288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 43569072d5c6SJ. Bruce Fields if (status) 43571da177e4SLinus Torvalds goto out; 4358f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4359f9d7562fSJ. Bruce Fields if (!filp) { 4360f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4361f9d7562fSJ. Bruce Fields goto out; 4362f9d7562fSJ. Bruce Fields } 436321179d81SJeff Layton file_lock = locks_alloc_lock(); 436421179d81SJeff Layton if (!file_lock) { 436521179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 436621179d81SJeff Layton status = nfserr_jukebox; 436721179d81SJeff Layton goto out; 436821179d81SJeff Layton } 436921179d81SJeff Layton locks_init_lock(file_lock); 437021179d81SJeff Layton file_lock->fl_type = F_UNLCK; 437121179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 437221179d81SJeff Layton file_lock->fl_pid = current->tgid; 437321179d81SJeff Layton file_lock->fl_file = filp; 437421179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 437521179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 437621179d81SJeff Layton file_lock->fl_start = locku->lu_offset; 43771da177e4SLinus Torvalds 437821179d81SJeff Layton file_lock->fl_end = last_byte_offset(locku->lu_offset, 437921179d81SJeff Layton locku->lu_length); 438021179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 43811da177e4SLinus Torvalds 43821da177e4SLinus Torvalds /* 43831da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43841da177e4SLinus Torvalds */ 438521179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); 4386b8dd7b9aSAl Viro if (err) { 4387fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43881da177e4SLinus Torvalds goto out_nfserr; 43891da177e4SLinus Torvalds } 43901da177e4SLinus Torvalds /* 43911da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43921da177e4SLinus Torvalds */ 4393dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4394dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43951da177e4SLinus Torvalds 43961da177e4SLinus Torvalds out: 439771c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43981da177e4SLinus Torvalds nfs4_unlock_state(); 439921179d81SJeff Layton if (file_lock) 440021179d81SJeff Layton locks_free_lock(file_lock); 44011da177e4SLinus Torvalds return status; 44021da177e4SLinus Torvalds 44031da177e4SLinus Torvalds out_nfserr: 4404b8dd7b9aSAl Viro status = nfserrno(err); 44051da177e4SLinus Torvalds goto out; 44061da177e4SLinus Torvalds } 44071da177e4SLinus Torvalds 44081da177e4SLinus Torvalds /* 44091da177e4SLinus Torvalds * returns 44101da177e4SLinus Torvalds * 1: locks held by lockowner 44111da177e4SLinus Torvalds * 0: no locks held by lockowner 44121da177e4SLinus Torvalds */ 44131da177e4SLinus Torvalds static int 4414fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 44151da177e4SLinus Torvalds { 44161da177e4SLinus Torvalds struct file_lock **flpp; 4417f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 44181da177e4SLinus Torvalds int status = 0; 44191da177e4SLinus Torvalds 4420b89f4321SArnd Bergmann lock_flocks(); 44211da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4422796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 44231da177e4SLinus Torvalds status = 1; 44241da177e4SLinus Torvalds goto out; 44251da177e4SLinus Torvalds } 4426796dadfdSJ. Bruce Fields } 44271da177e4SLinus Torvalds out: 4428b89f4321SArnd Bergmann unlock_flocks(); 44291da177e4SLinus Torvalds return status; 44301da177e4SLinus Torvalds } 44311da177e4SLinus Torvalds 4432b37ad28bSAl Viro __be32 4433b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4434b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4435b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 44361da177e4SLinus Torvalds { 44371da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 44383e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4439fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4440dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 44411da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 44423e9e3dbeSNeilBrown struct list_head matches; 444316bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4444b37ad28bSAl Viro __be32 status; 44457f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 44461da177e4SLinus Torvalds 44471da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 44481da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 44491da177e4SLinus Torvalds 44501da177e4SLinus Torvalds /* XXX check for lease expiration */ 44511da177e4SLinus Torvalds 44521da177e4SLinus Torvalds status = nfserr_stale_clientid; 44532c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 44541da177e4SLinus Torvalds return status; 44551da177e4SLinus Torvalds 44561da177e4SLinus Torvalds nfs4_lock_state(); 44571da177e4SLinus Torvalds 44581da177e4SLinus Torvalds status = nfserr_locks_held; 44593e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 446006f1f864SJ. Bruce Fields 44619b531137SStanislav Kinsbursky list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { 446216bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 446316bfdaafSJ. Bruce Fields continue; 4464599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 44653e9e3dbeSNeilBrown continue; 44663e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4467ea1da636SNeilBrown st_perstateowner) { 4468fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4469fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 44701da177e4SLinus Torvalds goto out; 4471fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 44721da177e4SLinus Torvalds } 44733e9e3dbeSNeilBrown } 44743e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44753e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44763e9e3dbeSNeilBrown * have been checked. */ 44771da177e4SLinus Torvalds status = nfs_ok; 44780fa822e4SNeilBrown while (!list_empty(&matches)) { 4479fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4480fe0750e5SJ. Bruce Fields lo_list); 44810fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 44820fa822e4SNeilBrown * for openowners. */ 4483fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4484fe0750e5SJ. Bruce Fields release_lockowner(lo); 44851da177e4SLinus Torvalds } 44861da177e4SLinus Torvalds out: 44871da177e4SLinus Torvalds nfs4_unlock_state(); 44881da177e4SLinus Torvalds return status; 44891da177e4SLinus Torvalds } 44901da177e4SLinus Torvalds 44911da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4492a55370a3SNeilBrown alloc_reclaim(void) 44931da177e4SLinus Torvalds { 4494a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44951da177e4SLinus Torvalds } 44961da177e4SLinus Torvalds 44970ce0c2b5SJeff Layton bool 449852e19c09SStanislav Kinsbursky nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) 4499c7b9a459SNeilBrown { 45000ce0c2b5SJeff Layton struct nfs4_client_reclaim *crp; 4501c7b9a459SNeilBrown 450252e19c09SStanislav Kinsbursky crp = nfsd4_find_reclaim_client(name, nn); 45030ce0c2b5SJeff Layton return (crp && crp->cr_clp); 4504c7b9a459SNeilBrown } 4505c7b9a459SNeilBrown 45061da177e4SLinus Torvalds /* 45071da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 45081da177e4SLinus Torvalds */ 4509772a9bbbSJeff Layton struct nfs4_client_reclaim * 451052e19c09SStanislav Kinsbursky nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) 45111da177e4SLinus Torvalds { 45121da177e4SLinus Torvalds unsigned int strhashval; 4513772a9bbbSJeff Layton struct nfs4_client_reclaim *crp; 45141da177e4SLinus Torvalds 4515a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4516a55370a3SNeilBrown crp = alloc_reclaim(); 4517772a9bbbSJeff Layton if (crp) { 4518a55370a3SNeilBrown strhashval = clientstr_hashval(name); 45191da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 452052e19c09SStanislav Kinsbursky list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); 4521a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 45220ce0c2b5SJeff Layton crp->cr_clp = NULL; 452352e19c09SStanislav Kinsbursky nn->reclaim_str_hashtbl_size++; 4524772a9bbbSJeff Layton } 4525772a9bbbSJeff Layton return crp; 45261da177e4SLinus Torvalds } 45271da177e4SLinus Torvalds 45282a4317c5SJeff Layton void 452952e19c09SStanislav Kinsbursky nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) 4530ce30e539SJeff Layton { 4531ce30e539SJeff Layton list_del(&crp->cr_strhash); 4532ce30e539SJeff Layton kfree(crp); 453352e19c09SStanislav Kinsbursky nn->reclaim_str_hashtbl_size--; 4534ce30e539SJeff Layton } 4535ce30e539SJeff Layton 4536ce30e539SJeff Layton void 453752e19c09SStanislav Kinsbursky nfs4_release_reclaim(struct nfsd_net *nn) 45381da177e4SLinus Torvalds { 45391da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45401da177e4SLinus Torvalds int i; 45411da177e4SLinus Torvalds 45421da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 454352e19c09SStanislav Kinsbursky while (!list_empty(&nn->reclaim_str_hashtbl[i])) { 454452e19c09SStanislav Kinsbursky crp = list_entry(nn->reclaim_str_hashtbl[i].next, 45451da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 454652e19c09SStanislav Kinsbursky nfs4_remove_reclaim_record(crp, nn); 45471da177e4SLinus Torvalds } 45481da177e4SLinus Torvalds } 454952e19c09SStanislav Kinsbursky BUG_ON(nn->reclaim_str_hashtbl_size); 45501da177e4SLinus Torvalds } 45511da177e4SLinus Torvalds 45521da177e4SLinus Torvalds /* 45531da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 45542a4317c5SJeff Layton struct nfs4_client_reclaim * 455552e19c09SStanislav Kinsbursky nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) 45561da177e4SLinus Torvalds { 45571da177e4SLinus Torvalds unsigned int strhashval; 45581da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45591da177e4SLinus Torvalds 4560278c931cSJeff Layton dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); 45611da177e4SLinus Torvalds 4562278c931cSJeff Layton strhashval = clientstr_hashval(recdir); 456352e19c09SStanislav Kinsbursky list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { 4564278c931cSJeff Layton if (same_name(crp->cr_recdir, recdir)) { 45651da177e4SLinus Torvalds return crp; 45661da177e4SLinus Torvalds } 45671da177e4SLinus Torvalds } 45681da177e4SLinus Torvalds return NULL; 45691da177e4SLinus Torvalds } 45701da177e4SLinus Torvalds 45711da177e4SLinus Torvalds /* 45721da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 45731da177e4SLinus Torvalds */ 4574b37ad28bSAl Viro __be32 4575d15c077eSJ. Bruce Fields nfs4_check_open_reclaim(clientid_t *clid, bool sessions) 45761da177e4SLinus Torvalds { 4577a52d726bSJeff Layton struct nfs4_client *clp; 45788daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 4579a52d726bSJeff Layton 4580a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 45818daae4dcSStanislav Kinsbursky clp = find_confirmed_client(clid, sessions, nn); 4582a52d726bSJeff Layton if (clp == NULL) 4583a52d726bSJeff Layton return nfserr_reclaim_bad; 4584a52d726bSJeff Layton 4585a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45861da177e4SLinus Torvalds } 45871da177e4SLinus Torvalds 458865178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 458965178db4SBryan Schumaker 459065178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 459165178db4SBryan Schumaker { 459265178db4SBryan Schumaker struct nfs4_client *clp, *next; 459365178db4SBryan Schumaker int count = 0; 459465178db4SBryan Schumaker 459565178db4SBryan Schumaker nfs4_lock_state(); 459665178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 459765178db4SBryan Schumaker expire_client(clp); 459865178db4SBryan Schumaker if (++count == num) 459965178db4SBryan Schumaker break; 460065178db4SBryan Schumaker } 460165178db4SBryan Schumaker nfs4_unlock_state(); 460265178db4SBryan Schumaker 460365178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 460465178db4SBryan Schumaker } 460565178db4SBryan Schumaker 460665178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 460765178db4SBryan Schumaker { 460865178db4SBryan Schumaker release_lockowner(lockowner(sop)); 460965178db4SBryan Schumaker } 461065178db4SBryan Schumaker 461165178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 461265178db4SBryan Schumaker { 461365178db4SBryan Schumaker release_openowner(openowner(sop)); 461465178db4SBryan Schumaker } 461565178db4SBryan Schumaker 4616353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 46179b531137SStanislav Kinsbursky void (*release_sop)(struct nfs4_stateowner *), 46189b531137SStanislav Kinsbursky struct nfsd_net *nn) 461965178db4SBryan Schumaker { 462065178db4SBryan Schumaker int i, count = 0; 462165178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 462265178db4SBryan Schumaker 462316bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 46249b531137SStanislav Kinsbursky list_for_each_entry_safe(sop, next, &nn->ownerstr_hashtbl[i], so_strhash) { 462516bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 462616bfdaafSJ. Bruce Fields continue; 462765178db4SBryan Schumaker release_sop(sop); 462865178db4SBryan Schumaker if (++count == num) 462965178db4SBryan Schumaker return count; 463065178db4SBryan Schumaker } 463165178db4SBryan Schumaker } 463265178db4SBryan Schumaker return count; 463365178db4SBryan Schumaker } 463465178db4SBryan Schumaker 463565178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 463665178db4SBryan Schumaker { 463765178db4SBryan Schumaker int count; 46389b531137SStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 463965178db4SBryan Schumaker 464065178db4SBryan Schumaker nfs4_lock_state(); 46419b531137SStanislav Kinsbursky count = nfsd_release_n_owners(num, false, release_lockowner_sop, nn); 464265178db4SBryan Schumaker nfs4_unlock_state(); 464365178db4SBryan Schumaker 464465178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 464565178db4SBryan Schumaker } 464665178db4SBryan Schumaker 464765178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 464865178db4SBryan Schumaker { 464965178db4SBryan Schumaker int count; 46509b531137SStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 465165178db4SBryan Schumaker 465265178db4SBryan Schumaker nfs4_lock_state(); 46539b531137SStanislav Kinsbursky count = nfsd_release_n_owners(num, true, release_openowner_sop, nn); 465465178db4SBryan Schumaker nfs4_unlock_state(); 465565178db4SBryan Schumaker 465665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 465765178db4SBryan Schumaker } 465865178db4SBryan Schumaker 4659da5c80a9SJ. Bruce Fields static int nfsd_process_n_delegations(u64 num, struct list_head *list) 466065178db4SBryan Schumaker { 466165178db4SBryan Schumaker int i, count = 0; 46622d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 46632d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 466465178db4SBryan Schumaker 466565178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 46662d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 46672d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 4668a6d88f29SStanislav Kinsbursky list_move(&dp->dl_recall_lru, list); 466965178db4SBryan Schumaker if (++count == num) 467065178db4SBryan Schumaker return count; 467165178db4SBryan Schumaker } 467265178db4SBryan Schumaker } 467365178db4SBryan Schumaker } 46742d3475c0SBryan Schumaker 467565178db4SBryan Schumaker return count; 467665178db4SBryan Schumaker } 467765178db4SBryan Schumaker 467865178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 467965178db4SBryan Schumaker { 468065178db4SBryan Schumaker unsigned int count; 4681a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4682a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 4683a6d88f29SStanislav Kinsbursky 4684a6d88f29SStanislav Kinsbursky spin_lock(&recall_lock); 4685a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4686a6d88f29SStanislav Kinsbursky spin_unlock(&recall_lock); 468765178db4SBryan Schumaker 468865178db4SBryan Schumaker nfs4_lock_state(); 4689a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) 4690a6d88f29SStanislav Kinsbursky unhash_delegation(dp); 469165178db4SBryan Schumaker nfs4_unlock_state(); 469265178db4SBryan Schumaker 469365178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 469465178db4SBryan Schumaker } 469565178db4SBryan Schumaker 469665178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 469765178db4SBryan Schumaker { 469865178db4SBryan Schumaker unsigned int count; 4699a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4700a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 470165178db4SBryan Schumaker 470265178db4SBryan Schumaker spin_lock(&recall_lock); 4703a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4704a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { 4705a6d88f29SStanislav Kinsbursky list_del(&dp->dl_recall_lru); 4706a6d88f29SStanislav Kinsbursky nfsd_break_one_deleg(dp); 4707a6d88f29SStanislav Kinsbursky } 470865178db4SBryan Schumaker spin_unlock(&recall_lock); 470965178db4SBryan Schumaker 471065178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 471165178db4SBryan Schumaker } 471265178db4SBryan Schumaker 471365178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 471465178db4SBryan Schumaker 4715ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 47161da177e4SLinus Torvalds 471772083396SBryan Schumaker void 4718ac4d8ff2SNeilBrown nfs4_state_init(void) 47191da177e4SLinus Torvalds { 472072083396SBryan Schumaker int i; 47211da177e4SLinus Torvalds 47225282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 47235282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 47241da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 47251da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 47261da177e4SLinus Torvalds } 47271da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 47281da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 47291da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4730ac4d8ff2SNeilBrown } 4731ac4d8ff2SNeilBrown 4732c2f1a551SMeelap Shah /* 4733c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4734c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4735c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4736c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4737c2f1a551SMeelap Shah * 4738c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4739c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4740c2f1a551SMeelap Shah */ 4741c2f1a551SMeelap Shah static void 4742c2f1a551SMeelap Shah set_max_delegations(void) 4743c2f1a551SMeelap Shah { 4744c2f1a551SMeelap Shah /* 4745c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4746c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4747c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4748c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4749c2f1a551SMeelap Shah */ 4750c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4751c2f1a551SMeelap Shah } 4752c2f1a551SMeelap Shah 47538daae4dcSStanislav Kinsbursky static int nfs4_state_start_net(struct net *net) 47548daae4dcSStanislav Kinsbursky { 47558daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 47568daae4dcSStanislav Kinsbursky int i; 47578daae4dcSStanislav Kinsbursky 47588daae4dcSStanislav Kinsbursky nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * 47598daae4dcSStanislav Kinsbursky CLIENT_HASH_SIZE, GFP_KERNEL); 47608daae4dcSStanislav Kinsbursky if (!nn->conf_id_hashtbl) 4761382a62e7SStanislav Kinsbursky goto err; 47620a7ec377SStanislav Kinsbursky nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * 47630a7ec377SStanislav Kinsbursky CLIENT_HASH_SIZE, GFP_KERNEL); 47640a7ec377SStanislav Kinsbursky if (!nn->unconf_id_hashtbl) 47650a7ec377SStanislav Kinsbursky goto err_unconf_id; 47669b531137SStanislav Kinsbursky nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * 47679b531137SStanislav Kinsbursky OWNER_HASH_SIZE, GFP_KERNEL); 47689b531137SStanislav Kinsbursky if (!nn->ownerstr_hashtbl) 47699b531137SStanislav Kinsbursky goto err_ownerstr; 477020e9e2bcSStanislav Kinsbursky nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * 477120e9e2bcSStanislav Kinsbursky LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); 477220e9e2bcSStanislav Kinsbursky if (!nn->lockowner_ino_hashtbl) 477320e9e2bcSStanislav Kinsbursky goto err_lockowner_ino; 47748daae4dcSStanislav Kinsbursky 4775382a62e7SStanislav Kinsbursky for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47768daae4dcSStanislav Kinsbursky INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); 47770a7ec377SStanislav Kinsbursky INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); 4778382a62e7SStanislav Kinsbursky } 47799b531137SStanislav Kinsbursky for (i = 0; i < OWNER_HASH_SIZE; i++) 47809b531137SStanislav Kinsbursky INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); 478120e9e2bcSStanislav Kinsbursky for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 478220e9e2bcSStanislav Kinsbursky INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); 4783382a62e7SStanislav Kinsbursky nn->conf_name_tree = RB_ROOT; 4784a99454aaSStanislav Kinsbursky nn->unconf_name_tree = RB_ROOT; 47858daae4dcSStanislav Kinsbursky 47868daae4dcSStanislav Kinsbursky return 0; 4787382a62e7SStanislav Kinsbursky 478820e9e2bcSStanislav Kinsbursky err_lockowner_ino: 478920e9e2bcSStanislav Kinsbursky kfree(nn->ownerstr_hashtbl); 47909b531137SStanislav Kinsbursky err_ownerstr: 47919b531137SStanislav Kinsbursky kfree(nn->unconf_id_hashtbl); 47920a7ec377SStanislav Kinsbursky err_unconf_id: 47930a7ec377SStanislav Kinsbursky kfree(nn->conf_id_hashtbl); 4794382a62e7SStanislav Kinsbursky err: 4795382a62e7SStanislav Kinsbursky return -ENOMEM; 47968daae4dcSStanislav Kinsbursky } 47978daae4dcSStanislav Kinsbursky 47988daae4dcSStanislav Kinsbursky static void 47998daae4dcSStanislav Kinsbursky __nfs4_state_shutdown_net(struct net *net) 48008daae4dcSStanislav Kinsbursky { 48018daae4dcSStanislav Kinsbursky int i; 48028daae4dcSStanislav Kinsbursky struct nfs4_client *clp = NULL; 48038daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 4804a99454aaSStanislav Kinsbursky struct rb_node *node, *tmp; 48058daae4dcSStanislav Kinsbursky 48068daae4dcSStanislav Kinsbursky for (i = 0; i < CLIENT_HASH_SIZE; i++) { 48078daae4dcSStanislav Kinsbursky while (!list_empty(&nn->conf_id_hashtbl[i])) { 48088daae4dcSStanislav Kinsbursky clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 48098daae4dcSStanislav Kinsbursky destroy_client(clp); 48108daae4dcSStanislav Kinsbursky } 48118daae4dcSStanislav Kinsbursky } 4812a99454aaSStanislav Kinsbursky 4813a99454aaSStanislav Kinsbursky node = rb_first(&nn->unconf_name_tree); 4814a99454aaSStanislav Kinsbursky while (node != NULL) { 4815a99454aaSStanislav Kinsbursky tmp = node; 4816a99454aaSStanislav Kinsbursky node = rb_next(tmp); 4817a99454aaSStanislav Kinsbursky clp = rb_entry(tmp, struct nfs4_client, cl_namenode); 4818a99454aaSStanislav Kinsbursky rb_erase(tmp, &nn->unconf_name_tree); 4819a99454aaSStanislav Kinsbursky destroy_client(clp); 4820a99454aaSStanislav Kinsbursky } 4821a99454aaSStanislav Kinsbursky 482220e9e2bcSStanislav Kinsbursky kfree(nn->lockowner_ino_hashtbl); 48239b531137SStanislav Kinsbursky kfree(nn->ownerstr_hashtbl); 48240a7ec377SStanislav Kinsbursky kfree(nn->unconf_id_hashtbl); 48258daae4dcSStanislav Kinsbursky kfree(nn->conf_id_hashtbl); 48268daae4dcSStanislav Kinsbursky } 48278daae4dcSStanislav Kinsbursky 4828ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4829ac4d8ff2SNeilBrown 4830a6d6b781SJeff Layton int 4831a6d6b781SJeff Layton nfs4_state_start(void) 4832ac4d8ff2SNeilBrown { 48335e1533c7SStanislav Kinsbursky struct net *net = &init_net; 48345e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 4835b5a1a81eSJ. Bruce Fields int ret; 4836b5a1a81eSJ. Bruce Fields 48372a4317c5SJeff Layton /* 48382a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 48392a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 48402a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 48412a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 48422a4317c5SJeff Layton * basis. 48432a4317c5SJeff Layton */ 48445e1533c7SStanislav Kinsbursky get_net(net); 48458daae4dcSStanislav Kinsbursky ret = nfs4_state_start_net(net); 48468daae4dcSStanislav Kinsbursky if (ret) 48478daae4dcSStanislav Kinsbursky return ret; 48485e1533c7SStanislav Kinsbursky nfsd4_client_tracking_init(net); 48492c142baaSStanislav Kinsbursky nn->boot_time = get_seconds(); 48505ccb0066SStanislav Kinsbursky locks_start_grace(net, &nn->nfsd4_manager); 4851a51c84edSStanislav Kinsbursky nn->grace_ended = false; 48529a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4853e46b498cSJ. Bruce Fields nfsd4_grace); 4854b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4855a6d6b781SJeff Layton if (ret) { 4856a6d6b781SJeff Layton ret = -ENOMEM; 4857a6d6b781SJeff Layton goto out_recovery; 4858a6d6b781SJeff Layton } 485958da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4860a6d6b781SJeff Layton if (laundry_wq == NULL) { 4861a6d6b781SJeff Layton ret = -ENOMEM; 4862a6d6b781SJeff Layton goto out_recovery; 4863a6d6b781SJeff Layton } 4864b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4865b5a1a81eSJ. Bruce Fields if (ret) 4866b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4867e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4868c2f1a551SMeelap Shah set_max_delegations(); 4869b5a1a81eSJ. Bruce Fields return 0; 4870b5a1a81eSJ. Bruce Fields out_free_laundry: 4871b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4872a6d6b781SJeff Layton out_recovery: 48735e1533c7SStanislav Kinsbursky nfsd4_client_tracking_exit(net); 48748daae4dcSStanislav Kinsbursky __nfs4_state_shutdown_net(net); 48755e1533c7SStanislav Kinsbursky put_net(net); 4876b5a1a81eSJ. Bruce Fields return ret; 48771da177e4SLinus Torvalds } 48781da177e4SLinus Torvalds 4879ac55fdc4SJeff Layton /* should be called with the state lock held */ 48801da177e4SLinus Torvalds static void 48818daae4dcSStanislav Kinsbursky __nfs4_state_shutdown(struct net *net) 48821da177e4SLinus Torvalds { 48831da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 48841da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 48851da177e4SLinus Torvalds 48868daae4dcSStanislav Kinsbursky __nfs4_state_shutdown_net(net); 4887ac55fdc4SJeff Layton 48881da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 48891da177e4SLinus Torvalds spin_lock(&recall_lock); 48901da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 48911da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 48921da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 48931da177e4SLinus Torvalds } 48941da177e4SLinus Torvalds spin_unlock(&recall_lock); 48951da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 48961da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 48971da177e4SLinus Torvalds unhash_delegation(dp); 48981da177e4SLinus Torvalds } 48991da177e4SLinus Torvalds 49002a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 49012a4317c5SJeff Layton put_net(&init_net); 49021da177e4SLinus Torvalds } 49031da177e4SLinus Torvalds 49041da177e4SLinus Torvalds void 49051da177e4SLinus Torvalds nfs4_state_shutdown(void) 49061da177e4SLinus Torvalds { 49075e1533c7SStanislav Kinsbursky struct net *net = &init_net; 49085e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 49095e1533c7SStanislav Kinsbursky 4910afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 49115e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 49125e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 49131da177e4SLinus Torvalds nfs4_lock_state(); 49148daae4dcSStanislav Kinsbursky __nfs4_state_shutdown(net); 49151da177e4SLinus Torvalds nfs4_unlock_state(); 4916c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 49171da177e4SLinus Torvalds } 49188b70484cSTigran Mkrtchyan 49198b70484cSTigran Mkrtchyan static void 49208b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 49218b70484cSTigran Mkrtchyan { 492237c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 492337c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 49248b70484cSTigran Mkrtchyan } 49258b70484cSTigran Mkrtchyan 49268b70484cSTigran Mkrtchyan static void 49278b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 49288b70484cSTigran Mkrtchyan { 492937c593c5STigran Mkrtchyan if (cstate->minorversion) { 493037c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 493137c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 493237c593c5STigran Mkrtchyan } 493337c593c5STigran Mkrtchyan } 493437c593c5STigran Mkrtchyan 493537c593c5STigran Mkrtchyan void 493637c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 493737c593c5STigran Mkrtchyan { 493837c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 49398b70484cSTigran Mkrtchyan } 49408b70484cSTigran Mkrtchyan 494162cd4a59STigran Mkrtchyan /* 494262cd4a59STigran Mkrtchyan * functions to set current state id 494362cd4a59STigran Mkrtchyan */ 49448b70484cSTigran Mkrtchyan void 49459428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 49469428fe1aSTigran Mkrtchyan { 49479428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 49489428fe1aSTigran Mkrtchyan } 49499428fe1aSTigran Mkrtchyan 49509428fe1aSTigran Mkrtchyan void 49518b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 49528b70484cSTigran Mkrtchyan { 49538b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 49548b70484cSTigran Mkrtchyan } 49558b70484cSTigran Mkrtchyan 49568b70484cSTigran Mkrtchyan void 495762cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 495862cd4a59STigran Mkrtchyan { 495962cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 496062cd4a59STigran Mkrtchyan } 496162cd4a59STigran Mkrtchyan 496262cd4a59STigran Mkrtchyan void 496362cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 496462cd4a59STigran Mkrtchyan { 496562cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 496662cd4a59STigran Mkrtchyan } 496762cd4a59STigran Mkrtchyan 496862cd4a59STigran Mkrtchyan /* 496962cd4a59STigran Mkrtchyan * functions to consume current state id 497062cd4a59STigran Mkrtchyan */ 49711e97b519STigran Mkrtchyan 49721e97b519STigran Mkrtchyan void 49739428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 49749428fe1aSTigran Mkrtchyan { 49759428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 49769428fe1aSTigran Mkrtchyan } 49779428fe1aSTigran Mkrtchyan 49789428fe1aSTigran Mkrtchyan void 49799428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 49809428fe1aSTigran Mkrtchyan { 49819428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 49829428fe1aSTigran Mkrtchyan } 49839428fe1aSTigran Mkrtchyan 49849428fe1aSTigran Mkrtchyan void 49851e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 49861e97b519STigran Mkrtchyan { 49871e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 49881e97b519STigran Mkrtchyan } 49891e97b519STigran Mkrtchyan 49901e97b519STigran Mkrtchyan void 49911e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 49921e97b519STigran Mkrtchyan { 49931e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 49941e97b519STigran Mkrtchyan } 49951e97b519STigran Mkrtchyan 499662cd4a59STigran Mkrtchyan void 49978b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 49988b70484cSTigran Mkrtchyan { 49998b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 50008b70484cSTigran Mkrtchyan } 50018b70484cSTigran Mkrtchyan 50028b70484cSTigran Mkrtchyan void 500362cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 50048b70484cSTigran Mkrtchyan { 500562cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 50068b70484cSTigran Mkrtchyan } 500730813e27STigran Mkrtchyan 500830813e27STigran Mkrtchyan void 500930813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 501030813e27STigran Mkrtchyan { 501130813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 501230813e27STigran Mkrtchyan } 501330813e27STigran Mkrtchyan 501430813e27STigran Mkrtchyan void 501530813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 501630813e27STigran Mkrtchyan { 501730813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 501830813e27STigran Mkrtchyan } 5019