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 17916bfdaafSJ. Bruce Fields static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 180ef0f3390SNeilBrown 181ef0f3390SNeilBrown /* hash table for nfs4_file */ 182ef0f3390SNeilBrown #define FILE_HASH_BITS 8 183ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 18435079582SShan Wei 185ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 186ddc04c41SJ. Bruce Fields { 187ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 188ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 189ddc04c41SJ. Bruce Fields } 190ddc04c41SJ. Bruce Fields 191ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 192ef0f3390SNeilBrown 193998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 194f9d7562fSJ. Bruce Fields { 195f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 196f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 197f9d7562fSJ. Bruce Fields } 198f9d7562fSJ. Bruce Fields 199998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 200998db52cSJ. Bruce Fields { 201998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 202998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 203998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 204998db52cSJ. Bruce Fields } else 205998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 206998db52cSJ. Bruce Fields } 207998db52cSJ. Bruce Fields 208998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 209f9d7562fSJ. Bruce Fields { 210f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 211f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 212f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 213f9d7562fSJ. Bruce Fields } 214f9d7562fSJ. Bruce Fields } 215f9d7562fSJ. Bruce Fields 216998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 217f9d7562fSJ. Bruce Fields { 218f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 219f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 2203d02fa29SJ. Bruce Fields /* 2213d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 2223d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 2233d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 2243d02fa29SJ. Bruce Fields */ 2253d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 2263d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 2273d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 228f9d7562fSJ. Bruce Fields } 229f9d7562fSJ. Bruce Fields } 230f9d7562fSJ. Bruce Fields 231998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 232998db52cSJ. Bruce Fields { 233998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 234998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 235998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 236998db52cSJ. Bruce Fields } else 237998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 238998db52cSJ. Bruce Fields } 239998db52cSJ. Bruce Fields 2406136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 24136d44c60SJ. Bruce Fields { 2426136d2b4SJ. Bruce Fields static int min_stateid = 0; 24338c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2446136d2b4SJ. Bruce Fields int new_stid; 2456136d2b4SJ. Bruce Fields int error; 24636d44c60SJ. Bruce Fields 24738c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2486136d2b4SJ. Bruce Fields /* 249996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 250996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 251996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 252996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2536136d2b4SJ. Bruce Fields */ 2546136d2b4SJ. Bruce Fields BUG_ON(error); 2556136d2b4SJ. Bruce Fields /* 2566136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2576136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2586136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2596136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2606136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2616136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2626136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2636136d2b4SJ. Bruce Fields */ 2646136d2b4SJ. Bruce Fields 2656136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2666136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2676136d2b4SJ. Bruce Fields min_stateid = 0; 2686136d2b4SJ. Bruce Fields return new_stid; 26936d44c60SJ. Bruce Fields } 27036d44c60SJ. Bruce Fields 271996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2722a74aba7SJ. Bruce Fields { 2732a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2746136d2b4SJ. Bruce Fields int new_id; 2752a74aba7SJ. Bruce Fields 2762a74aba7SJ. Bruce Fields stid->sc_type = type; 2772a74aba7SJ. Bruce Fields stid->sc_client = cl; 2782a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2796136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2806136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2812a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2822a74aba7SJ. Bruce Fields s->si_generation = 0; 283996e0938SJ. Bruce Fields } 284996e0938SJ. Bruce Fields 285996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 286996e0938SJ. Bruce Fields { 287996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 288996e0938SJ. Bruce Fields 289996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 290996e0938SJ. Bruce Fields return NULL; 291996e0938SJ. Bruce Fields /* 292996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 293996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 294996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 295996e0938SJ. Bruce Fields * preallocated entries. 296996e0938SJ. Bruce Fields */ 297996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2982a74aba7SJ. Bruce Fields } 2992a74aba7SJ. Bruce Fields 3004cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 3014cdc951bSJ. Bruce Fields { 3024cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 3034cdc951bSJ. Bruce Fields } 3044cdc951bSJ. Bruce Fields 3051da177e4SLinus Torvalds static struct nfs4_delegation * 306dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 3071da177e4SLinus Torvalds { 3081da177e4SLinus Torvalds struct nfs4_delegation *dp; 3091da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 312c3e48080SJ. Bruce Fields /* 313c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 314c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 315c3e48080SJ. Bruce Fields * write delegations properly. 316c3e48080SJ. Bruce Fields */ 317c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 318c3e48080SJ. Bruce Fields return NULL; 31947f9940cSMeelap Shah if (fp->fi_had_conflict) 32047f9940cSMeelap Shah return NULL; 321c2f1a551SMeelap Shah if (num_delegations > max_delegations) 322ef0f3390SNeilBrown return NULL; 323996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 3245b2d21c1SNeilBrown if (dp == NULL) 3251da177e4SLinus Torvalds return dp; 326996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 3272a74aba7SJ. Bruce Fields /* 3282a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3296136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3306136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3312a74aba7SJ. Bruce Fields */ 3322a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 333ef0f3390SNeilBrown num_delegations++; 334ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 335ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3361da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 33713cd2184SNeilBrown get_nfs4_file(fp); 3381da177e4SLinus Torvalds dp->dl_file = fp; 3391da177e4SLinus Torvalds dp->dl_type = type; 3406c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3411da177e4SLinus Torvalds dp->dl_time = 0; 3421da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 34357725155SJ. Bruce Fields nfsd4_init_callback(&dp->dl_recall); 3441da177e4SLinus Torvalds return dp; 3451da177e4SLinus Torvalds } 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds void 3481da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3491da177e4SLinus Torvalds { 3501da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3511da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 35213cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3535b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 354ef0f3390SNeilBrown num_delegations--; 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds 358acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3591da177e4SLinus Torvalds { 360acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 361acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 362acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3634ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 364acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 365acfdf5c3SJ. Bruce Fields } 3661da177e4SLinus Torvalds } 3671da177e4SLinus Torvalds 3686136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3696136d2b4SJ. Bruce Fields { 37038c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 37138c2f4b1SJ. Bruce Fields 37238c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3736136d2b4SJ. Bruce Fields } 3746136d2b4SJ. Bruce Fields 3751da177e4SLinus Torvalds /* Called under the state lock. */ 3761da177e4SLinus Torvalds static void 3771da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3781da177e4SLinus Torvalds { 3796136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 380ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3811da177e4SLinus Torvalds spin_lock(&recall_lock); 3825d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3831da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3841da177e4SLinus Torvalds spin_unlock(&recall_lock); 385acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3861da177e4SLinus Torvalds nfs4_put_delegation(dp); 3871da177e4SLinus Torvalds } 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds /* 3901da177e4SLinus Torvalds * SETCLIENTID state 3911da177e4SLinus Torvalds */ 3921da177e4SLinus Torvalds 39336acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3949089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3959089f1b4SBenny Halevy 396ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 397ddc04c41SJ. Bruce Fields { 398ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 399ddc04c41SJ. Bruce Fields } 400ddc04c41SJ. Bruce Fields 401ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 402ddc04c41SJ. Bruce Fields { 403ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 404ddc04c41SJ. Bruce Fields } 405ddc04c41SJ. Bruce Fields 4061da177e4SLinus Torvalds /* 407ac55fdc4SJeff Layton * unconf_id_hashtbl[] and unconf_name_tree hold unconfirmed 4081da177e4SLinus Torvalds * setclientid info. 4091da177e4SLinus Torvalds * 4101da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 4111da177e4SLinus Torvalds * for lease renewal. 4121da177e4SLinus Torvalds * 4131da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 4141da177e4SLinus Torvalds * for last close replay. 415ac55fdc4SJeff Layton * 416ac55fdc4SJeff Layton * All of the above fields are protected by the client_mutex. 4171da177e4SLinus Torvalds */ 4181da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 419ac55fdc4SJeff Layton static struct rb_root unconf_name_tree; 4201da177e4SLinus Torvalds static struct list_head client_lru; 4211da177e4SLinus Torvalds static struct list_head close_lru; 4221da177e4SLinus Torvalds 423f9d7562fSJ. Bruce Fields /* 424f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 425f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 426f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 427f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 428f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 429f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 430f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 431f9d7562fSJ. Bruce Fields * 432f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 433f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 434f9d7562fSJ. Bruce Fields * 435f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 436f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 437f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 438f9d7562fSJ. Bruce Fields * 439f9d7562fSJ. Bruce Fields * which we should reject. 440f9d7562fSJ. Bruce Fields */ 4415ae037e5SJeff Layton static unsigned int 4425ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 443f9d7562fSJ. Bruce Fields int i; 4445ae037e5SJeff Layton unsigned int access = 0; 445f9d7562fSJ. Bruce Fields 446f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 447f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 4485ae037e5SJeff Layton access |= i; 449f9d7562fSJ. Bruce Fields } 4505ae037e5SJeff Layton return access; 451f9d7562fSJ. Bruce Fields } 452f9d7562fSJ. Bruce Fields 4533a328614SJeff Layton static bool 454dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 455f9d7562fSJ. Bruce Fields unsigned int access, deny; 456f9d7562fSJ. Bruce Fields 4575ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 4585ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 459f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 4603a328614SJeff Layton return false; 4613a328614SJeff Layton return true; 462f9d7562fSJ. Bruce Fields } 463f9d7562fSJ. Bruce Fields 46482c5ff1bSJeff Layton /* set share access for a given stateid */ 46582c5ff1bSJeff Layton static inline void 46682c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 46782c5ff1bSJeff Layton { 46882c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 46982c5ff1bSJeff Layton } 47082c5ff1bSJeff Layton 47182c5ff1bSJeff Layton /* clear share access for a given stateid */ 47282c5ff1bSJeff Layton static inline void 47382c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 47482c5ff1bSJeff Layton { 47582c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 47682c5ff1bSJeff Layton } 47782c5ff1bSJeff Layton 47882c5ff1bSJeff Layton /* test whether a given stateid has access */ 47982c5ff1bSJeff Layton static inline bool 48082c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 48182c5ff1bSJeff Layton { 48282c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 48382c5ff1bSJeff Layton } 48482c5ff1bSJeff Layton 485ce0fc43cSJeff Layton /* set share deny for a given stateid */ 486ce0fc43cSJeff Layton static inline void 487ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 488ce0fc43cSJeff Layton { 489ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 490ce0fc43cSJeff Layton } 491ce0fc43cSJeff Layton 492ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 493ce0fc43cSJeff Layton static inline void 494ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 495ce0fc43cSJeff Layton { 496ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 497ce0fc43cSJeff Layton } 498ce0fc43cSJeff Layton 499ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 500ce0fc43cSJeff Layton static inline bool 501ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 502ce0fc43cSJeff Layton { 503ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 504f9d7562fSJ. Bruce Fields } 505f9d7562fSJ. Bruce Fields 506f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 507f9d7562fSJ. Bruce Fields { 5088f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 509f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 510f9d7562fSJ. Bruce Fields return O_RDONLY; 511f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 512f9d7562fSJ. Bruce Fields return O_WRONLY; 513f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 514f9d7562fSJ. Bruce Fields return O_RDWR; 515f9d7562fSJ. Bruce Fields } 516f9d7562fSJ. Bruce Fields BUG(); 517f9d7562fSJ. Bruce Fields } 518f9d7562fSJ. Bruce Fields 51982c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 52082c5ff1bSJeff Layton static void 52182c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 52282c5ff1bSJeff Layton { 52382c5ff1bSJeff Layton int i; 52482c5ff1bSJeff Layton 52582c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 52682c5ff1bSJeff Layton if (test_access(i, stp)) 52782c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 52882c5ff1bSJeff Layton nfs4_access_to_omode(i)); 52982c5ff1bSJeff Layton clear_access(i, stp); 53082c5ff1bSJeff Layton } 53182c5ff1bSJeff Layton } 53282c5ff1bSJeff Layton 533dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 534529d7b2aSJ. Bruce Fields { 535529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 536529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 537529d7b2aSJ. Bruce Fields } 538529d7b2aSJ. Bruce Fields 539dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 540529d7b2aSJ. Bruce Fields { 54182c5ff1bSJeff Layton release_all_access(stp); 542a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5434665e2baSJ. Bruce Fields stp->st_file = NULL; 5444665e2baSJ. Bruce Fields } 5454665e2baSJ. Bruce Fields 546dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5474665e2baSJ. Bruce Fields { 548529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 549529d7b2aSJ. Bruce Fields } 550529d7b2aSJ. Bruce Fields 551dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 552529d7b2aSJ. Bruce Fields { 553529d7b2aSJ. Bruce Fields struct file *file; 554529d7b2aSJ. Bruce Fields 555529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5566136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 557529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 558529d7b2aSJ. Bruce Fields if (file) 559fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 56038c387b5SJ. Bruce Fields close_generic_stateid(stp); 561529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 562529d7b2aSJ. Bruce Fields } 563529d7b2aSJ. Bruce Fields 564fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 565529d7b2aSJ. Bruce Fields { 566dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 567529d7b2aSJ. Bruce Fields 568fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 569fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 570009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 571fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 572fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 573dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 574529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 575529d7b2aSJ. Bruce Fields } 576529d7b2aSJ. Bruce Fields } 577529d7b2aSJ. Bruce Fields 578fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 579529d7b2aSJ. Bruce Fields { 580fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 581fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 582529d7b2aSJ. Bruce Fields } 583529d7b2aSJ. Bruce Fields 584529d7b2aSJ. Bruce Fields static void 585dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 586529d7b2aSJ. Bruce Fields { 587fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 588529d7b2aSJ. Bruce Fields 589529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 590fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 591fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 592fe0750e5SJ. Bruce Fields release_lockowner(lo); 593529d7b2aSJ. Bruce Fields } 594529d7b2aSJ. Bruce Fields } 595529d7b2aSJ. Bruce Fields 59638c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 5972283963fSJ. Bruce Fields { 5982283963fSJ. Bruce Fields unhash_generic_stateid(stp); 5992283963fSJ. Bruce Fields release_stateid_lockowners(stp); 60038c387b5SJ. Bruce Fields close_generic_stateid(stp); 60138c387b5SJ. Bruce Fields } 60238c387b5SJ. Bruce Fields 60338c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 60438c387b5SJ. Bruce Fields { 60538c387b5SJ. Bruce Fields unhash_open_stateid(stp); 6066136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 6072283963fSJ. Bruce Fields free_generic_stateid(stp); 6082283963fSJ. Bruce Fields } 6092283963fSJ. Bruce Fields 610fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 611f1d110caSJ. Bruce Fields { 612dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 613f1d110caSJ. Bruce Fields 614fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 615fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 616fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 617fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 618dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 619f1d110caSJ. Bruce Fields release_open_stateid(stp); 620f1d110caSJ. Bruce Fields } 621f1d110caSJ. Bruce Fields } 622f1d110caSJ. Bruce Fields 623f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 624f7a4d872SJ. Bruce Fields { 625f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 626f7a4d872SJ. Bruce Fields 627f7a4d872SJ. Bruce Fields if (s) { 6286136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 629f7a4d872SJ. Bruce Fields free_generic_stateid(s); 630f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 631f7a4d872SJ. Bruce Fields } 632f7a4d872SJ. Bruce Fields } 633f7a4d872SJ. Bruce Fields 634fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 635f1d110caSJ. Bruce Fields { 636fe0750e5SJ. Bruce Fields unhash_openowner(oo); 637fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 638f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 639fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 640f1d110caSJ. Bruce Fields } 641f1d110caSJ. Bruce Fields 6425282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6435282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6445282fd72SMarc Eshel 6455282fd72SMarc Eshel static inline int 6465282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6475282fd72SMarc Eshel { 6485282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6495282fd72SMarc Eshel 6505282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6515282fd72SMarc Eshel } 6525282fd72SMarc Eshel 6538f199b82STrond Myklebust #ifdef NFSD_DEBUG 6545282fd72SMarc Eshel static inline void 6555282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6565282fd72SMarc Eshel { 6575282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6585282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6595282fd72SMarc Eshel } 6608f199b82STrond Myklebust #else 6618f199b82STrond Myklebust static inline void 6628f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6638f199b82STrond Myklebust { 6648f199b82STrond Myklebust } 6658f199b82STrond Myklebust #endif 6668f199b82STrond Myklebust 6675282fd72SMarc Eshel 668ec6b5d7bSAndy Adamson static void 669ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 670ec6b5d7bSAndy Adamson { 671ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 672ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 673ec6b5d7bSAndy Adamson 674ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 675ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 676ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 677ec6b5d7bSAndy Adamson sid->reserved = 0; 678ec6b5d7bSAndy Adamson } 679ec6b5d7bSAndy Adamson 680ec6b5d7bSAndy Adamson /* 681a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 682a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 683a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 684a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 685a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 686a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 687a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 688a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 689a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 690a649637cSAndy Adamson * for the SEQUENCE op response: 691ec6b5d7bSAndy Adamson */ 692a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 693a649637cSAndy Adamson 694557ce264SAndy Adamson static void 695557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 696557ce264SAndy Adamson { 697557ce264SAndy Adamson int i; 698557ce264SAndy Adamson 699557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 700557ce264SAndy Adamson kfree(ses->se_slots[i]); 701557ce264SAndy Adamson } 702557ce264SAndy Adamson 703efe0cb6dSJ. Bruce Fields /* 704efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 705efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 706efe0cb6dSJ. Bruce Fields */ 707efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 708efe0cb6dSJ. Bruce Fields { 709efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 710efe0cb6dSJ. Bruce Fields } 711efe0cb6dSJ. Bruce Fields 7125b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 713ec6b5d7bSAndy Adamson { 7145b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 7155b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 716ec6b5d7bSAndy Adamson 7175b6feee9SJ. Bruce Fields return size; 718557ce264SAndy Adamson } 719557ce264SAndy Adamson 7205b6feee9SJ. Bruce Fields /* 7215b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 7225b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 72342b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 7245b6feee9SJ. Bruce Fields */ 7255b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 7265b6feee9SJ. Bruce Fields { 7275b6feee9SJ. Bruce Fields int avail; 7285b6feee9SJ. Bruce Fields 7295b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7305b6feee9SJ. Bruce Fields 7315b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7325b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7335b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7345b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7355b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7365b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7375b6feee9SJ. Bruce Fields 7385b6feee9SJ. Bruce Fields return num; 7395b6feee9SJ. Bruce Fields } 7405b6feee9SJ. Bruce Fields 7415b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7425b6feee9SJ. Bruce Fields { 7435b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7445b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7455b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7465b6feee9SJ. Bruce Fields } 7475b6feee9SJ. Bruce Fields 748a827bcb2SJ. Bruce Fields static struct nfsd4_session *__alloc_session(int slotsize, int numslots) 7495b6feee9SJ. Bruce Fields { 7505b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7515b6feee9SJ. Bruce Fields int mem, i; 752ec6b5d7bSAndy Adamson 753c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 754ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7555b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 756ec6b5d7bSAndy Adamson 7575b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7586c18ba9fSAlexandros Batsakis if (!new) 7595b6feee9SJ. Bruce Fields return NULL; 760ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7615b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7625b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7635b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7645b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 765ec6b5d7bSAndy Adamson goto out_free; 766ec6b5d7bSAndy Adamson } 7675b6feee9SJ. Bruce Fields return new; 7685b6feee9SJ. Bruce Fields out_free: 7695b6feee9SJ. Bruce Fields while (i--) 7705b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7715b6feee9SJ. Bruce Fields kfree(new); 7725b6feee9SJ. Bruce Fields return NULL; 7735b6feee9SJ. Bruce Fields } 7745b6feee9SJ. Bruce Fields 7755b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7765b6feee9SJ. Bruce Fields { 7775b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7785b6feee9SJ. Bruce Fields 7795b6feee9SJ. Bruce Fields new->maxreqs = numslots; 780d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 781d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7825b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7835b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7845b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7855b6feee9SJ. Bruce Fields } 7865b6feee9SJ. Bruce Fields 78719cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 78819cf5c02SJ. Bruce Fields { 78919cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 79019cf5c02SJ. Bruce Fields kfree(c); 79119cf5c02SJ. Bruce Fields } 79219cf5c02SJ. Bruce Fields 79319cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 79419cf5c02SJ. Bruce Fields { 79519cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 79619cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 79719cf5c02SJ. Bruce Fields 79819cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 79919cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 80019cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 80119cf5c02SJ. Bruce Fields free_conn(c); 80219cf5c02SJ. Bruce Fields } 80319cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 804eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 80519cf5c02SJ. Bruce Fields } 80619cf5c02SJ. Bruce Fields 807d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 808c7662518SJ. Bruce Fields { 809c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 810c7662518SJ. Bruce Fields 811c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 812c7662518SJ. Bruce Fields if (!conn) 813db90681dSJ. Bruce Fields return NULL; 814c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 815c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 816d29c374cSJ. Bruce Fields conn->cn_flags = flags; 817db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 818db90681dSJ. Bruce Fields return conn; 819db90681dSJ. Bruce Fields } 820db90681dSJ. Bruce Fields 821328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 822328ead28SJ. Bruce Fields { 823328ead28SJ. Bruce Fields conn->cn_session = ses; 824328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 825328ead28SJ. Bruce Fields } 826328ead28SJ. Bruce Fields 827db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 828db90681dSJ. Bruce Fields { 829db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 830c7662518SJ. Bruce Fields 831c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 832328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 833c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 834db90681dSJ. Bruce Fields } 835c7662518SJ. Bruce Fields 83621b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 837db90681dSJ. Bruce Fields { 83819cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 83921b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 840db90681dSJ. Bruce Fields } 841db90681dSJ. Bruce Fields 842e1ff371fSJ. Bruce Fields static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) 843db90681dSJ. Bruce Fields { 84421b75b01SJ. Bruce Fields int ret; 845db90681dSJ. Bruce Fields 846db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 84721b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 84821b75b01SJ. Bruce Fields if (ret) 84921b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 85021b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 8516a3b1563SJ. Bruce Fields if (conn->cn_flags & NFS4_CDFC4_BACK) { 85224119673SWeston Andros Adamson /* callback channel may be back up */ 85324119673SWeston Andros Adamson nfsd4_probe_callback(ses->se_client); 85424119673SWeston Andros Adamson } 855c7662518SJ. Bruce Fields } 856c7662518SJ. Bruce Fields 857e1ff371fSJ. Bruce Fields static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) 8581d1bc8f2SJ. Bruce Fields { 8591d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8601d1bc8f2SJ. Bruce Fields 861e1ff371fSJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) 8621d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 863e1ff371fSJ. Bruce Fields return alloc_conn(rqstp, dir); 8641d1bc8f2SJ. Bruce Fields } 8651d1bc8f2SJ. Bruce Fields 8661d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 86719cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 868c7662518SJ. Bruce Fields { 86919cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 87019cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 87119cf5c02SJ. Bruce Fields 87219cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 87319cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 87419cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 87519cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 87619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 87719cf5c02SJ. Bruce Fields 87819cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 87919cf5c02SJ. Bruce Fields free_conn(c); 88019cf5c02SJ. Bruce Fields 88119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 88219cf5c02SJ. Bruce Fields } 88319cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 884c7662518SJ. Bruce Fields } 885c7662518SJ. Bruce Fields 8861377b69eSJ. Bruce Fields static void __free_session(struct nfsd4_session *ses) 8871377b69eSJ. Bruce Fields { 8881377b69eSJ. Bruce Fields nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); 8891377b69eSJ. Bruce Fields free_session_slots(ses); 8901377b69eSJ. Bruce Fields kfree(ses); 8911377b69eSJ. Bruce Fields } 8921377b69eSJ. Bruce Fields 893508dc6e1SBenny Halevy static void free_session(struct kref *kref) 894c7662518SJ. Bruce Fields { 895c7662518SJ. Bruce Fields struct nfsd4_session *ses; 896c7662518SJ. Bruce Fields 897bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 898c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 89919cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 9001377b69eSJ. Bruce Fields __free_session(ses); 901c7662518SJ. Bruce Fields } 902c7662518SJ. Bruce Fields 903508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 904508dc6e1SBenny Halevy { 905508dc6e1SBenny Halevy spin_lock(&client_lock); 906508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 907508dc6e1SBenny Halevy spin_unlock(&client_lock); 908508dc6e1SBenny Halevy } 909508dc6e1SBenny Halevy 910a827bcb2SJ. Bruce Fields static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan) 9115b6feee9SJ. Bruce Fields { 9125b6feee9SJ. Bruce Fields struct nfsd4_session *new; 9135b6feee9SJ. Bruce Fields int numslots, slotsize; 9145b6feee9SJ. Bruce Fields /* 9155b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 9165b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 9175b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 9185b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 9195b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 9205b6feee9SJ. Bruce Fields */ 9215b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 9225b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 923ced6dfe9SMi Jinlong if (numslots < 1) 924ced6dfe9SMi Jinlong return NULL; 9255b6feee9SJ. Bruce Fields 926a827bcb2SJ. Bruce Fields new = __alloc_session(slotsize, numslots); 9275b6feee9SJ. Bruce Fields if (!new) { 9285b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 929ac7c46f2SJ. Bruce Fields return NULL; 9305b6feee9SJ. Bruce Fields } 9315b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 932a827bcb2SJ. Bruce Fields return new; 933a827bcb2SJ. Bruce Fields } 934ec6b5d7bSAndy Adamson 935135ae827SFengguang Wu static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) 936a827bcb2SJ. Bruce Fields { 937a827bcb2SJ. Bruce Fields int idx; 938a827bcb2SJ. Bruce Fields 939ec6b5d7bSAndy Adamson new->se_client = clp; 940ec6b5d7bSAndy Adamson gen_sessionid(new); 941ec6b5d7bSAndy Adamson 942c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 943c7662518SJ. Bruce Fields 944ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 945ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9468b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 947c6bb3ca2SJ. Bruce Fields new->se_cb_sec = cses->cb_sec; 948ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9495b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9509089f1b4SBenny Halevy spin_lock(&client_lock); 951ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9524c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 953ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9544c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9559089f1b4SBenny Halevy spin_unlock(&client_lock); 956ec6b5d7bSAndy Adamson 957dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 958edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 959dcbeaa68SJ. Bruce Fields /* 960dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 961dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 962dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 963dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 964dcbeaa68SJ. Bruce Fields * future: 965dcbeaa68SJ. Bruce Fields */ 966edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 967edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 968edd76786SJ. Bruce Fields } 969ec6b5d7bSAndy Adamson } 970ec6b5d7bSAndy Adamson 9719089f1b4SBenny Halevy /* caller must hold client_lock */ 9725282fd72SMarc Eshel static struct nfsd4_session * 9735282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9745282fd72SMarc Eshel { 9755282fd72SMarc Eshel struct nfsd4_session *elem; 9765282fd72SMarc Eshel int idx; 9775282fd72SMarc Eshel 9785282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9795282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9805282fd72SMarc Eshel /* Search in the appropriate list */ 9815282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 9825282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 9835282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 9845282fd72SMarc Eshel return elem; 9855282fd72SMarc Eshel } 9865282fd72SMarc Eshel } 9875282fd72SMarc Eshel 9885282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 9895282fd72SMarc Eshel return NULL; 9905282fd72SMarc Eshel } 9915282fd72SMarc Eshel 9929089f1b4SBenny Halevy /* caller must hold client_lock */ 9937116ed6bSAndy Adamson static void 9945282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 9957116ed6bSAndy Adamson { 9967116ed6bSAndy Adamson list_del(&ses->se_hash); 9974c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 9987116ed6bSAndy Adamson list_del(&ses->se_perclnt); 9994c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 10005282fd72SMarc Eshel } 10015282fd72SMarc Eshel 100236acb66bSBenny Halevy /* must be called under the client_lock */ 10031da177e4SLinus Torvalds static inline void 100436acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 10051da177e4SLinus Torvalds { 100607cd4909SBenny Halevy if (is_client_expired(clp)) { 10077447758bSJ. Bruce Fields WARN_ON(1); 10087447758bSJ. Bruce Fields printk("%s: client (clientid %08x/%08x) already expired\n", 100907cd4909SBenny Halevy __func__, 101007cd4909SBenny Halevy clp->cl_clientid.cl_boot, 101107cd4909SBenny Halevy clp->cl_clientid.cl_id); 101207cd4909SBenny Halevy return; 101307cd4909SBenny Halevy } 101407cd4909SBenny Halevy 10151da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 10161da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 10171da177e4SLinus Torvalds clp->cl_clientid.cl_id); 10181da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 10191da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10201da177e4SLinus Torvalds } 10211da177e4SLinus Torvalds 102236acb66bSBenny Halevy static inline void 102336acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 102436acb66bSBenny Halevy { 102536acb66bSBenny Halevy spin_lock(&client_lock); 102636acb66bSBenny Halevy renew_client_locked(clp); 102736acb66bSBenny Halevy spin_unlock(&client_lock); 102836acb66bSBenny Halevy } 102936acb66bSBenny Halevy 10301da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10311da177e4SLinus Torvalds static int 10322c142baaSStanislav Kinsbursky STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) 10331da177e4SLinus Torvalds { 10342c142baaSStanislav Kinsbursky if (clid->cl_boot == nn->boot_time) 10351da177e4SLinus Torvalds return 0; 103660adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 10372c142baaSStanislav Kinsbursky clid->cl_boot, clid->cl_id, nn->boot_time); 10381da177e4SLinus Torvalds return 1; 10391da177e4SLinus Torvalds } 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds /* 10421da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10431da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10441da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10451da177e4SLinus Torvalds */ 104635bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10471da177e4SLinus Torvalds { 10481da177e4SLinus Torvalds struct nfs4_client *clp; 10491da177e4SLinus Torvalds 105035bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 105135bba9a3SJ. Bruce Fields if (clp == NULL) 105235bba9a3SJ. Bruce Fields return NULL; 105367114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 105435bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 105535bba9a3SJ. Bruce Fields kfree(clp); 105635bba9a3SJ. Bruce Fields return NULL; 105735bba9a3SJ. Bruce Fields } 10581da177e4SLinus Torvalds clp->cl_name.len = name.len; 10591da177e4SLinus Torvalds return clp; 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds 10621da177e4SLinus Torvalds static inline void 10631da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10641da177e4SLinus Torvalds { 1065bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 1066792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1067792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1068792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1069792c95ddSJ. Bruce Fields se_perclnt); 1070792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1071508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1072792c95ddSJ. Bruce Fields } 107303a4e1f6SJ. Bruce Fields free_svc_cred(&clp->cl_cred); 10741da177e4SLinus Torvalds kfree(clp->cl_name.data); 10751da177e4SLinus Torvalds kfree(clp); 10761da177e4SLinus Torvalds } 10771da177e4SLinus Torvalds 1078d7682988SBenny Halevy void 1079d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1080d7682988SBenny Halevy { 1081d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1082d7682988SBenny Halevy 1083d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1084d7682988SBenny Halevy return; 1085d7682988SBenny Halevy if (is_client_expired(clp)) { 1086d7682988SBenny Halevy free_client(clp); 1087d7682988SBenny Halevy session->se_client = NULL; 1088d7682988SBenny Halevy } else 1089d7682988SBenny Halevy renew_client_locked(clp); 1090d7682988SBenny Halevy spin_unlock(&client_lock); 1091d7682988SBenny Halevy } 1092d7682988SBenny Halevy 109384d38ac9SBenny Halevy /* must be called under the client_lock */ 109484d38ac9SBenny Halevy static inline void 109584d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 109684d38ac9SBenny Halevy { 1097792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1098792c95ddSJ. Bruce Fields 109907cd4909SBenny Halevy mark_client_expired(clp); 110084d38ac9SBenny Halevy list_del(&clp->cl_lru); 11014c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1102792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1103792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 11044c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 110584d38ac9SBenny Halevy } 110684d38ac9SBenny Halevy 11071da177e4SLinus Torvalds static void 11080d22f68fSJ. Bruce Fields destroy_client(struct nfs4_client *clp) 11091da177e4SLinus Torvalds { 1110fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 11111da177e4SLinus Torvalds struct nfs4_delegation *dp; 11121da177e4SLinus Torvalds struct list_head reaplist; 1113*382a62e7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 11141da177e4SLinus Torvalds 11151da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 11161da177e4SLinus Torvalds spin_lock(&recall_lock); 1117ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1118ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1119ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11201da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11211da177e4SLinus Torvalds } 11221da177e4SLinus Torvalds spin_unlock(&recall_lock); 11231da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11241da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11251da177e4SLinus Torvalds unhash_delegation(dp); 11261da177e4SLinus Torvalds } 1127ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1128fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1129fe0750e5SJ. Bruce Fields release_openowner(oo); 11301da177e4SLinus Torvalds } 11316ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11322bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11332bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 113484d38ac9SBenny Halevy list_del(&clp->cl_idhash); 1135ac55fdc4SJeff Layton if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) 1136*382a62e7SStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->conf_name_tree); 1137ac55fdc4SJeff Layton else 1138ac55fdc4SJeff Layton rb_erase(&clp->cl_namenode, &unconf_name_tree); 113984d38ac9SBenny Halevy spin_lock(&client_lock); 114084d38ac9SBenny Halevy unhash_client_locked(clp); 114146583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1142b12a05cbSJ. Bruce Fields free_client(clp); 114346583e25SBenny Halevy spin_unlock(&client_lock); 11441da177e4SLinus Torvalds } 11451da177e4SLinus Torvalds 11460d22f68fSJ. Bruce Fields static void expire_client(struct nfs4_client *clp) 11470d22f68fSJ. Bruce Fields { 11480d22f68fSJ. Bruce Fields nfsd4_client_record_remove(clp); 11490d22f68fSJ. Bruce Fields destroy_client(clp); 11500d22f68fSJ. Bruce Fields } 11510d22f68fSJ. Bruce Fields 115235bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 115335bba9a3SJ. Bruce Fields { 115435bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 115535bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11561da177e4SLinus Torvalds } 11571da177e4SLinus Torvalds 115835bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 115935bba9a3SJ. Bruce Fields { 11601da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11611da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds 116403a4e1f6SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 116535bba9a3SJ. Bruce Fields { 116603a4e1f6SJ. Bruce Fields if (source->cr_principal) { 116703a4e1f6SJ. Bruce Fields target->cr_principal = 116803a4e1f6SJ. Bruce Fields kstrdup(source->cr_principal, GFP_KERNEL); 116903a4e1f6SJ. Bruce Fields if (target->cr_principal == NULL) 117003a4e1f6SJ. Bruce Fields return -ENOMEM; 117103a4e1f6SJ. Bruce Fields } else 117203a4e1f6SJ. Bruce Fields target->cr_principal = NULL; 1173d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 11741da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11751da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11761da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11771da177e4SLinus Torvalds get_group_info(target->cr_group_info); 117803a4e1f6SJ. Bruce Fields return 0; 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 1181ac55fdc4SJeff Layton static long long 1182ac55fdc4SJeff Layton compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) 1183ac55fdc4SJeff Layton { 1184ac55fdc4SJeff Layton long long res; 1185ac55fdc4SJeff Layton 1186ac55fdc4SJeff Layton res = o1->len - o2->len; 1187ac55fdc4SJeff Layton if (res) 1188ac55fdc4SJeff Layton return res; 1189ac55fdc4SJeff Layton return (long long)memcmp(o1->data, o2->data, o1->len); 1190ac55fdc4SJeff Layton } 1191ac55fdc4SJeff Layton 119235bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1193599e0a22SJ. Bruce Fields { 1194a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11951da177e4SLinus Torvalds } 11961da177e4SLinus Torvalds 11971da177e4SLinus Torvalds static int 1198599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1199599e0a22SJ. Bruce Fields { 1200599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds static int 1204599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1205599e0a22SJ. Bruce Fields { 1206599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 12071da177e4SLinus Torvalds } 12081da177e4SLinus Torvalds 12098fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 12108fbba96eSJ. Bruce Fields { 12118fbba96eSJ. Bruce Fields int i; 12128fbba96eSJ. Bruce Fields 12138fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 12148fbba96eSJ. Bruce Fields return false; 12158fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 12168fbba96eSJ. Bruce Fields if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) 12178fbba96eSJ. Bruce Fields return false; 12188fbba96eSJ. Bruce Fields return true; 12198fbba96eSJ. Bruce Fields } 12208fbba96eSJ. Bruce Fields 122168eb3508SJ. Bruce Fields /* 122268eb3508SJ. Bruce Fields * RFC 3530 language requires clid_inuse be returned when the 122368eb3508SJ. Bruce Fields * "principal" associated with a requests differs from that previously 122468eb3508SJ. Bruce Fields * used. We use uid, gid's, and gss principal string as our best 122568eb3508SJ. Bruce Fields * approximation. We also don't want to allow non-gss use of a client 122668eb3508SJ. Bruce Fields * established using gss: in theory cr_principal should catch that 122768eb3508SJ. Bruce Fields * change, but in practice cr_principal can be null even in the gss case 122868eb3508SJ. Bruce Fields * since gssd doesn't always pass down a principal string. 122968eb3508SJ. Bruce Fields */ 123068eb3508SJ. Bruce Fields static bool is_gss_cred(struct svc_cred *cr) 123168eb3508SJ. Bruce Fields { 123268eb3508SJ. Bruce Fields /* Is cr_flavor one of the gss "pseudoflavors"?: */ 123368eb3508SJ. Bruce Fields return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); 123468eb3508SJ. Bruce Fields } 123568eb3508SJ. Bruce Fields 123668eb3508SJ. Bruce Fields 12375559b50aSVivek Trivedi static bool 1238599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1239599e0a22SJ. Bruce Fields { 124068eb3508SJ. Bruce Fields if ((is_gss_cred(cr1) != is_gss_cred(cr2)) 1241d5497fc6SJ. Bruce Fields || (cr1->cr_uid != cr2->cr_uid) 12428fbba96eSJ. Bruce Fields || (cr1->cr_gid != cr2->cr_gid) 12438fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 12448fbba96eSJ. Bruce Fields return false; 12458fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 12468fbba96eSJ. Bruce Fields return true; 12478fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 12488fbba96eSJ. Bruce Fields return false; 12495559b50aSVivek Trivedi return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); 12501da177e4SLinus Torvalds } 12511da177e4SLinus Torvalds 1252c212cecfSStanislav Kinsbursky static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) 12535ec7b46cSJ. Bruce Fields { 12545ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 12555ec7b46cSJ. Bruce Fields 12562c142baaSStanislav Kinsbursky clp->cl_clientid.cl_boot = nn->boot_time; 12571da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds 1260deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1261deda2faaSJ. Bruce Fields { 1262ab4684d1SChuck Lever __be32 verf[2]; 1263deda2faaSJ. Bruce Fields static u32 i; 12641da177e4SLinus Torvalds 1265ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1266ab4684d1SChuck Lever verf[1] = (__be32)i++; 1267ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 12681da177e4SLinus Torvalds } 12691da177e4SLinus Torvalds 127038c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 12714581d140SJ. Bruce Fields { 127238c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 12734581d140SJ. Bruce Fields } 12744d71ab87SJ. Bruce Fields 127538c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1276f459e453SJ. Bruce Fields { 1277f459e453SJ. Bruce Fields struct nfs4_stid *s; 1278f459e453SJ. Bruce Fields 127938c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1280f459e453SJ. Bruce Fields if (!s) 1281f459e453SJ. Bruce Fields return NULL; 1282f459e453SJ. Bruce Fields if (typemask & s->sc_type) 12834d71ab87SJ. Bruce Fields return s; 12844581d140SJ. Bruce Fields return NULL; 12854581d140SJ. Bruce Fields } 12864581d140SJ. Bruce Fields 12872216d449SJeff Layton static struct nfs4_client *create_client(struct xdr_netobj name, 1288b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1289b09333c4SRicardo Labiaga { 1290b09333c4SRicardo Labiaga struct nfs4_client *clp; 1291b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 129203a4e1f6SJ. Bruce Fields int ret; 1293c212cecfSStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 1294b09333c4SRicardo Labiaga 1295b09333c4SRicardo Labiaga clp = alloc_client(name); 1296b09333c4SRicardo Labiaga if (clp == NULL) 1297b09333c4SRicardo Labiaga return NULL; 1298b09333c4SRicardo Labiaga 1299792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 130003a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 130103a4e1f6SJ. Bruce Fields if (ret) { 1302508dc6e1SBenny Halevy spin_lock(&client_lock); 1303b09333c4SRicardo Labiaga free_client(clp); 1304508dc6e1SBenny Halevy spin_unlock(&client_lock); 1305b09333c4SRicardo Labiaga return NULL; 1306b09333c4SRicardo Labiaga } 130738c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 130846583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 130977a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1310b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1311b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1312b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1313b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 13145ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 13156ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 131657725155SJ. Bruce Fields nfsd4_init_callback(&clp->cl_cb_null); 131707cd4909SBenny Halevy clp->cl_time = get_seconds(); 1318b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1319b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1320b09333c4SRicardo Labiaga copy_verf(clp, verf); 1321b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1322b09333c4SRicardo Labiaga gen_confirm(clp); 1323edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1324c212cecfSStanislav Kinsbursky clp->net = net; 1325b09333c4SRicardo Labiaga return clp; 1326b09333c4SRicardo Labiaga } 1327b09333c4SRicardo Labiaga 1328fd39ca9aSNeilBrown static void 1329ac55fdc4SJeff Layton add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) 1330ac55fdc4SJeff Layton { 1331ac55fdc4SJeff Layton struct rb_node **new = &(root->rb_node), *parent = NULL; 1332ac55fdc4SJeff Layton struct nfs4_client *clp; 1333ac55fdc4SJeff Layton 1334ac55fdc4SJeff Layton while (*new) { 1335ac55fdc4SJeff Layton clp = rb_entry(*new, struct nfs4_client, cl_namenode); 1336ac55fdc4SJeff Layton parent = *new; 1337ac55fdc4SJeff Layton 1338ac55fdc4SJeff Layton if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) 1339ac55fdc4SJeff Layton new = &((*new)->rb_left); 1340ac55fdc4SJeff Layton else 1341ac55fdc4SJeff Layton new = &((*new)->rb_right); 1342ac55fdc4SJeff Layton } 1343ac55fdc4SJeff Layton 1344ac55fdc4SJeff Layton rb_link_node(&new_clp->cl_namenode, parent, new); 1345ac55fdc4SJeff Layton rb_insert_color(&new_clp->cl_namenode, root); 1346ac55fdc4SJeff Layton } 1347ac55fdc4SJeff Layton 1348ac55fdc4SJeff Layton static struct nfs4_client * 1349ac55fdc4SJeff Layton find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) 1350ac55fdc4SJeff Layton { 1351ac55fdc4SJeff Layton long long cmp; 1352ac55fdc4SJeff Layton struct rb_node *node = root->rb_node; 1353ac55fdc4SJeff Layton struct nfs4_client *clp; 1354ac55fdc4SJeff Layton 1355ac55fdc4SJeff Layton while (node) { 1356ac55fdc4SJeff Layton clp = rb_entry(node, struct nfs4_client, cl_namenode); 1357ac55fdc4SJeff Layton cmp = compare_blob(&clp->cl_name, name); 1358ac55fdc4SJeff Layton if (cmp > 0) 1359ac55fdc4SJeff Layton node = node->rb_left; 1360ac55fdc4SJeff Layton else if (cmp < 0) 1361ac55fdc4SJeff Layton node = node->rb_right; 1362ac55fdc4SJeff Layton else 1363ac55fdc4SJeff Layton return clp; 1364ac55fdc4SJeff Layton } 1365ac55fdc4SJeff Layton return NULL; 1366ac55fdc4SJeff Layton } 1367ac55fdc4SJeff Layton 1368ac55fdc4SJeff Layton static void 1369ac55fdc4SJeff Layton add_to_unconfirmed(struct nfs4_client *clp) 13701da177e4SLinus Torvalds { 13711da177e4SLinus Torvalds unsigned int idhashval; 13721da177e4SLinus Torvalds 1373ac55fdc4SJeff Layton clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); 1374ac55fdc4SJeff Layton add_clp_to_name_tree(clp, &unconf_name_tree); 13751da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13761da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 137736acb66bSBenny Halevy renew_client(clp); 13781da177e4SLinus Torvalds } 13791da177e4SLinus Torvalds 1380fd39ca9aSNeilBrown static void 13811da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 13821da177e4SLinus Torvalds { 13831da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13848daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 13878daae4dcSStanislav Kinsbursky list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); 1388ac55fdc4SJeff Layton rb_erase(&clp->cl_namenode, &unconf_name_tree); 1389*382a62e7SStanislav Kinsbursky add_clp_to_name_tree(clp, &nn->conf_name_tree); 1390ac55fdc4SJeff Layton set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); 13911da177e4SLinus Torvalds renew_client(clp); 13921da177e4SLinus Torvalds } 13931da177e4SLinus Torvalds 13941da177e4SLinus Torvalds static struct nfs4_client * 13958daae4dcSStanislav Kinsbursky find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) 13961da177e4SLinus Torvalds { 13971da177e4SLinus Torvalds struct nfs4_client *clp; 13981da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13991da177e4SLinus Torvalds 14008daae4dcSStanislav Kinsbursky list_for_each_entry(clp, &nn->conf_id_hashtbl[idhashval], cl_idhash) { 1401a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1402d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 1403d15c077eSJ. Bruce Fields return NULL; 1404a50d2ad1SJ. Bruce Fields renew_client(clp); 14051da177e4SLinus Torvalds return clp; 14061da177e4SLinus Torvalds } 1407a50d2ad1SJ. Bruce Fields } 14081da177e4SLinus Torvalds return NULL; 14091da177e4SLinus Torvalds } 14101da177e4SLinus Torvalds 14111da177e4SLinus Torvalds static struct nfs4_client * 1412d15c077eSJ. Bruce Fields find_unconfirmed_client(clientid_t *clid, bool sessions) 14131da177e4SLinus Torvalds { 14141da177e4SLinus Torvalds struct nfs4_client *clp; 14151da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 14161da177e4SLinus Torvalds 14171da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1418d15c077eSJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1419d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 1420d15c077eSJ. Bruce Fields return NULL; 14211da177e4SLinus Torvalds return clp; 14221da177e4SLinus Torvalds } 1423d15c077eSJ. Bruce Fields } 14241da177e4SLinus Torvalds return NULL; 14251da177e4SLinus Torvalds } 14261da177e4SLinus Torvalds 14276e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1428a1bcecd2SAndy Adamson { 14296e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1430a1bcecd2SAndy Adamson } 1431a1bcecd2SAndy Adamson 143228ce6054SNeilBrown static struct nfs4_client * 1433*382a62e7SStanislav Kinsbursky find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) 143428ce6054SNeilBrown { 1435*382a62e7SStanislav Kinsbursky return find_clp_in_name_tree(name, &nn->conf_name_tree); 143628ce6054SNeilBrown } 143728ce6054SNeilBrown 143828ce6054SNeilBrown static struct nfs4_client * 1439ac55fdc4SJeff Layton find_unconfirmed_client_by_name(struct xdr_netobj *name) 144028ce6054SNeilBrown { 1441ac55fdc4SJeff Layton return find_clp_in_name_tree(name, &unconf_name_tree); 144228ce6054SNeilBrown } 144328ce6054SNeilBrown 1444fd39ca9aSNeilBrown static void 14456f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 14461da177e4SLinus Torvalds { 144707263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 14486f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 14496f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 14507077ecbaSJeff Layton unsigned short expected_family; 14511da177e4SLinus Torvalds 14527077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 14537077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 14547077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 14557077ecbaSJeff Layton expected_family = AF_INET; 14567077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 14577077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 14587077ecbaSJeff Layton expected_family = AF_INET6; 14597077ecbaSJeff Layton else 14601da177e4SLinus Torvalds goto out_err; 14611da177e4SLinus Torvalds 1462c212cecfSStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, 1463aa9a4ec7SJeff Layton se->se_callback_addr_len, 146407263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 146507263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1466aa9a4ec7SJeff Layton 146707263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 14681da177e4SLinus Torvalds goto out_err; 1469aa9a4ec7SJeff Layton 147007263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 147107263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1472fbf4665fSJeff Layton 147307263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 147407263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1475849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 14761da177e4SLinus Torvalds return; 14771da177e4SLinus Torvalds out_err: 147807263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 147907263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1480849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 14811da177e4SLinus Torvalds "will not receive delegations\n", 14821da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 14831da177e4SLinus Torvalds 14841da177e4SLinus Torvalds return; 14851da177e4SLinus Torvalds } 14861da177e4SLinus Torvalds 1487074fe897SAndy Adamson /* 1488557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1489074fe897SAndy Adamson */ 1490074fe897SAndy Adamson void 1491074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1492074fe897SAndy Adamson { 1493557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1494557ce264SAndy Adamson unsigned int base; 1495074fe897SAndy Adamson 1496557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1497074fe897SAndy Adamson 1498557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1499557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1500bf864a31SAndy Adamson 1501bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1502bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1503557ce264SAndy Adamson slot->sl_datalen = 0; 1504bf864a31SAndy Adamson return; 1505bf864a31SAndy Adamson } 1506557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1507557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1508557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1509557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1510557ce264SAndy Adamson slot->sl_datalen)) 1511557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1512557ce264SAndy Adamson return; 1513074fe897SAndy Adamson } 1514074fe897SAndy Adamson 1515074fe897SAndy Adamson /* 1516abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1517abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1518abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1519abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1520abfabf8cSAndy Adamson * 1521074fe897SAndy Adamson */ 1522abfabf8cSAndy Adamson static __be32 1523abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1524abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1525074fe897SAndy Adamson { 1526abfabf8cSAndy Adamson struct nfsd4_op *op; 1527abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1528074fe897SAndy Adamson 1529abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1530abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1531abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1532abfabf8cSAndy Adamson 1533abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 153473e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1535abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1536abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1537abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1538074fe897SAndy Adamson } 1539abfabf8cSAndy Adamson return op->status; 1540074fe897SAndy Adamson } 1541074fe897SAndy Adamson 1542074fe897SAndy Adamson /* 1543557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1544557ce264SAndy Adamson * session values. 1545074fe897SAndy Adamson */ 1546074fe897SAndy Adamson __be32 1547bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1548bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1549074fe897SAndy Adamson { 1550557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1551074fe897SAndy Adamson __be32 status; 1552074fe897SAndy Adamson 1553557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1554074fe897SAndy Adamson 1555abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1556abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1557abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1558abfabf8cSAndy Adamson return status; 1559074fe897SAndy Adamson 1560557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1561557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1562074fe897SAndy Adamson 1563557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1564557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1565557ce264SAndy Adamson status = slot->sl_status; 1566074fe897SAndy Adamson 1567074fe897SAndy Adamson return status; 1568074fe897SAndy Adamson } 1569074fe897SAndy Adamson 15700733d213SAndy Adamson /* 15710733d213SAndy Adamson * Set the exchange_id flags returned by the server. 15720733d213SAndy Adamson */ 15730733d213SAndy Adamson static void 15740733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 15750733d213SAndy Adamson { 15760733d213SAndy Adamson /* pNFS is not supported */ 15770733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 15780733d213SAndy Adamson 15790733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 15800733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 15810733d213SAndy Adamson 15820733d213SAndy Adamson /* set the wire flags to return to client. */ 15830733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 15840733d213SAndy Adamson } 15850733d213SAndy Adamson 1586631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 1587631fc9eaSJ. Bruce Fields { 1588631fc9eaSJ. Bruce Fields /* 1589631fc9eaSJ. Bruce Fields * Note clp->cl_openowners check isn't quite right: there's no 1590631fc9eaSJ. Bruce Fields * need to count owners without stateid's. 1591631fc9eaSJ. Bruce Fields * 1592631fc9eaSJ. Bruce Fields * Also note we should probably be using this in 4.0 case too. 1593631fc9eaSJ. Bruce Fields */ 15946eccece9SJ. Bruce Fields return !list_empty(&clp->cl_openowners) 15956eccece9SJ. Bruce Fields || !list_empty(&clp->cl_delegations) 15966eccece9SJ. Bruce Fields || !list_empty(&clp->cl_sessions); 1597631fc9eaSJ. Bruce Fields } 1598631fc9eaSJ. Bruce Fields 1599b37ad28bSAl Viro __be32 1600069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1601069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1602069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1603069b6ad4SAndy Adamson { 16040733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 160557b7b43bSJ. Bruce Fields __be32 status; 1606363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 16070733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1608363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 160983e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 1610c212cecfSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 16110733d213SAndy Adamson 1612363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 16130733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1614363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 16150733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1616363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 16170733d213SAndy Adamson 1618a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 16190733d213SAndy Adamson return nfserr_inval; 16200733d213SAndy Adamson 16210733d213SAndy Adamson /* Currently only support SP4_NONE */ 16220733d213SAndy Adamson switch (exid->spa_how) { 16230733d213SAndy Adamson case SP4_NONE: 16240733d213SAndy Adamson break; 16250733d213SAndy Adamson case SP4_SSV: 1626044bc1d4SJ. Bruce Fields return nfserr_serverfault; 16270733d213SAndy Adamson default: 16280733d213SAndy Adamson BUG(); /* checked by xdr code */ 16290733d213SAndy Adamson case SP4_MACH_CRED: 16300733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 16310733d213SAndy Adamson } 16320733d213SAndy Adamson 16332dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 16340733d213SAndy Adamson nfs4_lock_state(); 1635*382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&exid->clname, nn); 16360733d213SAndy Adamson if (conf) { 163783e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 163883e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 163983e08fd4SJ. Bruce Fields 1640136e658dSJ. Bruce Fields if (update) { 1641136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 16422dbb269dSJ. Bruce Fields status = nfserr_inval; 1643e203d506SJ. Bruce Fields goto out; 1644e203d506SJ. Bruce Fields } 16452dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 16460733d213SAndy Adamson status = nfserr_perm; 16470733d213SAndy Adamson goto out; 16480733d213SAndy Adamson } 16492dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 16500733d213SAndy Adamson status = nfserr_not_same; 16510733d213SAndy Adamson goto out; 16520733d213SAndy Adamson } 1653136e658dSJ. Bruce Fields /* case 6 */ 16540733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 16550733d213SAndy Adamson new = conf; 16560733d213SAndy Adamson goto out_copy; 16576ddbbbfeSMike Sager } 1658136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 1659631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 1660136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 1661136e658dSJ. Bruce Fields goto out; 1662136e658dSJ. Bruce Fields } 1663b9831b59SJ. Bruce Fields expire_client(conf); 1664b9831b59SJ. Bruce Fields goto out_new; 1665631fc9eaSJ. Bruce Fields } 1666136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 16670f1ba0efSJ. Bruce Fields conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 1668136e658dSJ. Bruce Fields new = conf; 1669136e658dSJ. Bruce Fields goto out_copy; 1670136e658dSJ. Bruce Fields } 16712dbb269dSJ. Bruce Fields /* case 5, client reboot */ 16720733d213SAndy Adamson goto out_new; 16730733d213SAndy Adamson } 16746ddbbbfeSMike Sager 16752dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 16760733d213SAndy Adamson status = nfserr_noent; 16770733d213SAndy Adamson goto out; 16780733d213SAndy Adamson } 16790733d213SAndy Adamson 1680ac55fdc4SJeff Layton unconf = find_unconfirmed_client_by_name(&exid->clname); 16812dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 16820733d213SAndy Adamson expire_client(unconf); 16830733d213SAndy Adamson 16842dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 16850733d213SAndy Adamson out_new: 16862216d449SJeff Layton new = create_client(exid->clname, rqstp, &verf); 16870733d213SAndy Adamson if (new == NULL) { 16884731030dSJ. Bruce Fields status = nfserr_jukebox; 16890733d213SAndy Adamson goto out; 16900733d213SAndy Adamson } 1691c116a0afSJ. Bruce Fields new->cl_minorversion = 1; 16920733d213SAndy Adamson 1693c212cecfSStanislav Kinsbursky gen_clid(new, nn); 1694ac55fdc4SJeff Layton add_to_unconfirmed(new); 16950733d213SAndy Adamson out_copy: 16960733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 16970733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 16980733d213SAndy Adamson 1699778df3f0SJ. Bruce Fields exid->seqid = new->cl_cs_slot.sl_seqid + 1; 17000733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 17010733d213SAndy Adamson 17020733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 170349557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 17040733d213SAndy Adamson status = nfs_ok; 17050733d213SAndy Adamson 17060733d213SAndy Adamson out: 17070733d213SAndy Adamson nfs4_unlock_state(); 17080733d213SAndy Adamson return status; 1709069b6ad4SAndy Adamson } 1710069b6ad4SAndy Adamson 171157b7b43bSJ. Bruce Fields static __be32 171288e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1713b85d4c01SBenny Halevy { 171488e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 171588e588d5SAndy Adamson slot_seqid); 1716b85d4c01SBenny Halevy 1717b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 171888e588d5SAndy Adamson if (slot_inuse) { 171988e588d5SAndy Adamson if (seqid == slot_seqid) 1720b85d4c01SBenny Halevy return nfserr_jukebox; 1721b85d4c01SBenny Halevy else 1722b85d4c01SBenny Halevy return nfserr_seq_misordered; 1723b85d4c01SBenny Halevy } 1724f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 172588e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1726b85d4c01SBenny Halevy return nfs_ok; 172788e588d5SAndy Adamson if (seqid == slot_seqid) 1728b85d4c01SBenny Halevy return nfserr_replay_cache; 1729b85d4c01SBenny Halevy return nfserr_seq_misordered; 1730b85d4c01SBenny Halevy } 1731b85d4c01SBenny Halevy 173249557cc7SAndy Adamson /* 173349557cc7SAndy Adamson * Cache the create session result into the create session single DRC 173449557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 173549557cc7SAndy Adamson * Do this for solo or embedded create session operations. 173649557cc7SAndy Adamson */ 173749557cc7SAndy Adamson static void 173849557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 173957b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 174049557cc7SAndy Adamson { 174149557cc7SAndy Adamson slot->sl_status = nfserr; 174249557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 174349557cc7SAndy Adamson } 174449557cc7SAndy Adamson 174549557cc7SAndy Adamson static __be32 174649557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 174749557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 174849557cc7SAndy Adamson { 174949557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 175049557cc7SAndy Adamson return slot->sl_status; 175149557cc7SAndy Adamson } 175249557cc7SAndy Adamson 17531b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 17541b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 17551b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17561b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 17571b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17581b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 17591b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 17601b74c25bSMi Jinlong 17611b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 17621b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 17631b74c25bSMi Jinlong 1 + /* status */ \ 17641b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17651b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 17661b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17671b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 17681b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 17691b74c25bSMi Jinlong 177057b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 17711b74c25bSMi Jinlong { 17721b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 17731b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 17741b74c25bSMi Jinlong } 17751b74c25bSMi Jinlong 1776069b6ad4SAndy Adamson __be32 1777069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1778069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1779069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1780069b6ad4SAndy Adamson { 1781363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1782ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1783ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 178481f0b2a4SJ. Bruce Fields struct nfsd4_conn *conn; 178549557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 178657b7b43bSJ. Bruce Fields __be32 status = 0; 17878daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1788ec6b5d7bSAndy Adamson 1789a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1790a62573dcSMi Jinlong return nfserr_inval; 179149730501SJ. Bruce Fields if (check_forechannel_attrs(cr_ses->fore_channel)) 179249730501SJ. Bruce Fields return nfserr_toosmall; 179381f0b2a4SJ. Bruce Fields new = alloc_session(&cr_ses->fore_channel); 179481f0b2a4SJ. Bruce Fields if (!new) 179581f0b2a4SJ. Bruce Fields return nfserr_jukebox; 179681f0b2a4SJ. Bruce Fields status = nfserr_jukebox; 179781f0b2a4SJ. Bruce Fields conn = alloc_conn_from_crses(rqstp, cr_ses); 179881f0b2a4SJ. Bruce Fields if (!conn) 179981f0b2a4SJ. Bruce Fields goto out_free_session; 1800a62573dcSMi Jinlong 1801ec6b5d7bSAndy Adamson nfs4_lock_state(); 1802d15c077eSJ. Bruce Fields unconf = find_unconfirmed_client(&cr_ses->clientid, true); 18038daae4dcSStanislav Kinsbursky conf = find_confirmed_client(&cr_ses->clientid, true, nn); 1804ec6b5d7bSAndy Adamson 1805ec6b5d7bSAndy Adamson if (conf) { 180649557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 180749557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 180838eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 180949557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 181081f0b2a4SJ. Bruce Fields goto out_free_conn; 181149557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1812ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 181381f0b2a4SJ. Bruce Fields goto out_free_conn; 1814ec6b5d7bSAndy Adamson } 1815ec6b5d7bSAndy Adamson } else if (unconf) { 18168f9d3d3bSJ. Bruce Fields struct nfs4_client *old; 1817ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1818363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1819ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 182081f0b2a4SJ. Bruce Fields goto out_free_conn; 1821ec6b5d7bSAndy Adamson } 182249557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 182349557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 182438eb76a5SAndy Adamson if (status) { 182538eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1826ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 182781f0b2a4SJ. Bruce Fields goto out_free_conn; 1828ec6b5d7bSAndy Adamson } 1829*382a62e7SStanislav Kinsbursky old = find_confirmed_client_by_name(&unconf->cl_name, nn); 18308f9d3d3bSJ. Bruce Fields if (old) 18318f9d3d3bSJ. Bruce Fields expire_client(old); 18328f9d3d3bSJ. Bruce Fields move_to_confirmed(unconf); 1833ec6b5d7bSAndy Adamson conf = unconf; 1834ec6b5d7bSAndy Adamson } else { 1835ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 183681f0b2a4SJ. Bruce Fields goto out_free_conn; 1837ec6b5d7bSAndy Adamson } 183881f0b2a4SJ. Bruce Fields status = nfs_ok; 18398323c3b2SJ. Bruce Fields /* 1840408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1841408b79bcSJ. Bruce Fields */ 1842408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1843408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1844408b79bcSJ. Bruce Fields 184581f0b2a4SJ. Bruce Fields init_session(rqstp, new, conf, cr_ses); 184681f0b2a4SJ. Bruce Fields nfsd4_init_conn(rqstp, conn, new); 184781f0b2a4SJ. Bruce Fields 1848ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1849ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 185012050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 185112050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 185286c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 185349557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1854ec6b5d7bSAndy Adamson 185549557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 185649557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 1857ec6b5d7bSAndy Adamson out: 1858ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1859ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1860ec6b5d7bSAndy Adamson return status; 186181f0b2a4SJ. Bruce Fields out_free_conn: 186281f0b2a4SJ. Bruce Fields free_conn(conn); 186381f0b2a4SJ. Bruce Fields out_free_session: 186481f0b2a4SJ. Bruce Fields __free_session(new); 186581f0b2a4SJ. Bruce Fields goto out; 1866069b6ad4SAndy Adamson } 1867069b6ad4SAndy Adamson 186857716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 186957716355SJ. Bruce Fields { 187057716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 187157716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 187257716355SJ. Bruce Fields 187357716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 187457716355SJ. Bruce Fields } 187557716355SJ. Bruce Fields 18761d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 18771d1bc8f2SJ. Bruce Fields { 18781d1bc8f2SJ. Bruce Fields switch (*dir) { 18791d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 18801d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 18811d1bc8f2SJ. Bruce Fields return nfs_ok; 18821d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 18831d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 18841d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 18851d1bc8f2SJ. Bruce Fields return nfs_ok; 18861d1bc8f2SJ. Bruce Fields }; 18871d1bc8f2SJ. Bruce Fields return nfserr_inval; 18881d1bc8f2SJ. Bruce Fields } 18891d1bc8f2SJ. Bruce Fields 1890cb73a9f4SJ. Bruce Fields __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) 1891cb73a9f4SJ. Bruce Fields { 1892cb73a9f4SJ. Bruce Fields struct nfsd4_session *session = cstate->session; 1893cb73a9f4SJ. Bruce Fields 1894cb73a9f4SJ. Bruce Fields spin_lock(&client_lock); 1895cb73a9f4SJ. Bruce Fields session->se_cb_prog = bc->bc_cb_program; 1896cb73a9f4SJ. Bruce Fields session->se_cb_sec = bc->bc_cb_sec; 1897cb73a9f4SJ. Bruce Fields spin_unlock(&client_lock); 1898cb73a9f4SJ. Bruce Fields 1899cb73a9f4SJ. Bruce Fields nfsd4_probe_callback(session->se_client); 1900cb73a9f4SJ. Bruce Fields 1901cb73a9f4SJ. Bruce Fields return nfs_ok; 1902cb73a9f4SJ. Bruce Fields } 1903cb73a9f4SJ. Bruce Fields 19041d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 19051d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 19061d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 19071d1bc8f2SJ. Bruce Fields { 19081d1bc8f2SJ. Bruce Fields __be32 status; 19093ba63671SJ. Bruce Fields struct nfsd4_conn *conn; 19101d1bc8f2SJ. Bruce Fields 19111d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 19121d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 19131d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 19141d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 19151d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 19161d1bc8f2SJ. Bruce Fields * client_lock iself: */ 19171d1bc8f2SJ. Bruce Fields if (cstate->session) { 19181d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 19191d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 19201d1bc8f2SJ. Bruce Fields } 19211d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 19221d1bc8f2SJ. Bruce Fields if (!cstate->session) 19231d1bc8f2SJ. Bruce Fields return nfserr_badsession; 19241d1bc8f2SJ. Bruce Fields 19251d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 19263ba63671SJ. Bruce Fields if (status) 19271db2b9ddSBryan Schumaker return status; 19283ba63671SJ. Bruce Fields conn = alloc_conn(rqstp, bcts->dir); 19293ba63671SJ. Bruce Fields if (!conn) 19303ba63671SJ. Bruce Fields return nfserr_jukebox; 1931e1ff371fSJ. Bruce Fields nfsd4_init_conn(rqstp, conn, cstate->session); 19323ba63671SJ. Bruce Fields return nfs_ok; 19331d1bc8f2SJ. Bruce Fields } 19341d1bc8f2SJ. Bruce Fields 19355d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 19365d4cec2fSJ. Bruce Fields { 19375d4cec2fSJ. Bruce Fields if (!session) 19385d4cec2fSJ. Bruce Fields return 0; 19395d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 19405d4cec2fSJ. Bruce Fields } 19415d4cec2fSJ. Bruce Fields 1942069b6ad4SAndy Adamson __be32 1943069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1944069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1945069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1946069b6ad4SAndy Adamson { 1947e10e0cfcSBenny Halevy struct nfsd4_session *ses; 194857b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1949e10e0cfcSBenny Halevy 1950e10e0cfcSBenny Halevy /* Notes: 1951e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1952e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1953e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1954e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1955e10e0cfcSBenny Halevy */ 1956e10e0cfcSBenny Halevy 19575d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 195857716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 195957716355SJ. Bruce Fields return nfserr_not_only_op; 196057716355SJ. Bruce Fields } 1961e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 19629089f1b4SBenny Halevy spin_lock(&client_lock); 1963e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1964e10e0cfcSBenny Halevy if (!ses) { 19659089f1b4SBenny Halevy spin_unlock(&client_lock); 1966e10e0cfcSBenny Halevy goto out; 1967e10e0cfcSBenny Halevy } 1968e10e0cfcSBenny Halevy 1969e10e0cfcSBenny Halevy unhash_session(ses); 19709089f1b4SBenny Halevy spin_unlock(&client_lock); 1971e10e0cfcSBenny Halevy 1972ab707e15SBenny Halevy nfs4_lock_state(); 197384f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1974ab707e15SBenny Halevy nfs4_unlock_state(); 197519cf5c02SJ. Bruce Fields 1976508dc6e1SBenny Halevy spin_lock(&client_lock); 197719cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1978508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1979508dc6e1SBenny Halevy spin_unlock(&client_lock); 1980e10e0cfcSBenny Halevy status = nfs_ok; 1981e10e0cfcSBenny Halevy out: 1982e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1983e10e0cfcSBenny Halevy return status; 1984069b6ad4SAndy Adamson } 1985069b6ad4SAndy Adamson 1986a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1987328ead28SJ. Bruce Fields { 1988328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1989328ead28SJ. Bruce Fields 1990328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1991a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1992328ead28SJ. Bruce Fields return c; 1993328ead28SJ. Bruce Fields } 1994328ead28SJ. Bruce Fields } 1995328ead28SJ. Bruce Fields return NULL; 1996328ead28SJ. Bruce Fields } 1997328ead28SJ. Bruce Fields 1998a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1999328ead28SJ. Bruce Fields { 2000328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 2001a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 200221b75b01SJ. Bruce Fields int ret; 2003328ead28SJ. Bruce Fields 2004328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 2005a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 2006328ead28SJ. Bruce Fields if (c) { 2007328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 2008328ead28SJ. Bruce Fields free_conn(new); 2009328ead28SJ. Bruce Fields return; 2010328ead28SJ. Bruce Fields } 2011328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 2012328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 201321b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 201421b75b01SJ. Bruce Fields if (ret) 201521b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 201621b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 2017328ead28SJ. Bruce Fields return; 2018328ead28SJ. Bruce Fields } 2019328ead28SJ. Bruce Fields 2020868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 2021868b89c3SMi Jinlong { 2022868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 2023868b89c3SMi Jinlong 2024868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 2025868b89c3SMi Jinlong } 2026868b89c3SMi Jinlong 2027ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 2028ae82a8d0SMi Jinlong struct nfsd4_session *session) 2029ae82a8d0SMi Jinlong { 2030ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 2031ae82a8d0SMi Jinlong 2032ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 2033ae82a8d0SMi Jinlong } 2034ae82a8d0SMi Jinlong 2035069b6ad4SAndy Adamson __be32 2036b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 2037069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 2038069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 2039069b6ad4SAndy Adamson { 2040f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 2041b85d4c01SBenny Halevy struct nfsd4_session *session; 2042b85d4c01SBenny Halevy struct nfsd4_slot *slot; 2043a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 204457b7b43bSJ. Bruce Fields __be32 status; 2045b85d4c01SBenny Halevy 2046f9bb94c4SAndy Adamson if (resp->opcnt != 1) 2047f9bb94c4SAndy Adamson return nfserr_sequence_pos; 2048f9bb94c4SAndy Adamson 2049a663bdd8SJ. Bruce Fields /* 2050a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 2051a663bdd8SJ. Bruce Fields * below. 2052a663bdd8SJ. Bruce Fields */ 2053a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 2054a663bdd8SJ. Bruce Fields if (!conn) 2055a663bdd8SJ. Bruce Fields return nfserr_jukebox; 2056a663bdd8SJ. Bruce Fields 20579089f1b4SBenny Halevy spin_lock(&client_lock); 2058b85d4c01SBenny Halevy status = nfserr_badsession; 2059b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 2060b85d4c01SBenny Halevy if (!session) 2061b85d4c01SBenny Halevy goto out; 2062b85d4c01SBenny Halevy 2063868b89c3SMi Jinlong status = nfserr_too_many_ops; 2064868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 2065868b89c3SMi Jinlong goto out; 2066868b89c3SMi Jinlong 2067ae82a8d0SMi Jinlong status = nfserr_req_too_big; 2068ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 2069ae82a8d0SMi Jinlong goto out; 2070ae82a8d0SMi Jinlong 2071b85d4c01SBenny Halevy status = nfserr_badslot; 20726c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 2073b85d4c01SBenny Halevy goto out; 2074b85d4c01SBenny Halevy 2075557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 2076b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 2077b85d4c01SBenny Halevy 2078a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 2079a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 2080a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 2081a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 2082a8dfdaebSAndy Adamson 208373e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 208473e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 2085b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 2086bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 2087bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 2088bf5c43c8SJ. Bruce Fields goto out; 2089b85d4c01SBenny Halevy cstate->slot = slot; 2090b85d4c01SBenny Halevy cstate->session = session; 2091da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 2092557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 2093bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 2094da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2095aaf84eb9SBenny Halevy goto out; 2096b85d4c01SBenny Halevy } 2097b85d4c01SBenny Halevy if (status) 2098b85d4c01SBenny Halevy goto out; 2099b85d4c01SBenny Halevy 2100a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 2101a663bdd8SJ. Bruce Fields conn = NULL; 2102328ead28SJ. Bruce Fields 2103b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2104b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2105bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 210673e79482SJ. Bruce Fields if (seq->cachethis) 210773e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2108bf5c43c8SJ. Bruce Fields else 2109bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2110b85d4c01SBenny Halevy 2111b85d4c01SBenny Halevy cstate->slot = slot; 2112b85d4c01SBenny Halevy cstate->session = session; 2113b85d4c01SBenny Halevy 2114b85d4c01SBenny Halevy out: 211526c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 2116aaf84eb9SBenny Halevy if (cstate->session) { 21170d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 21180d7bb719SJ. Bruce Fields 211936acb66bSBenny Halevy nfsd4_get_session(cstate->session); 21200d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 21215423732aSBenny Halevy switch (clp->cl_cb_state) { 21225423732aSBenny Halevy case NFSD4_CB_DOWN: 2123fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 21245423732aSBenny Halevy break; 21255423732aSBenny Halevy case NFSD4_CB_FAULT: 2126fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 21275423732aSBenny Halevy break; 2128fc0c3dd1SBenny Halevy default: 2129fc0c3dd1SBenny Halevy seq->status_flags = 0; 21305423732aSBenny Halevy } 2131aaf84eb9SBenny Halevy } 2132a663bdd8SJ. Bruce Fields kfree(conn); 213336acb66bSBenny Halevy spin_unlock(&client_lock); 2134b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2135b85d4c01SBenny Halevy return status; 2136069b6ad4SAndy Adamson } 2137069b6ad4SAndy Adamson 2138345c2842SMi Jinlong __be32 2139345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2140345c2842SMi Jinlong { 2141345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 214257b7b43bSJ. Bruce Fields __be32 status = 0; 21438daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2144345c2842SMi Jinlong 2145345c2842SMi Jinlong nfs4_lock_state(); 2146d15c077eSJ. Bruce Fields unconf = find_unconfirmed_client(&dc->clientid, true); 21478daae4dcSStanislav Kinsbursky conf = find_confirmed_client(&dc->clientid, true, nn); 2148345c2842SMi Jinlong 2149345c2842SMi Jinlong if (conf) { 2150345c2842SMi Jinlong clp = conf; 2151345c2842SMi Jinlong 21526eccece9SJ. Bruce Fields if (!is_client_expired(conf) && client_has_state(conf)) { 2153345c2842SMi Jinlong status = nfserr_clientid_busy; 2154345c2842SMi Jinlong goto out; 2155345c2842SMi Jinlong } 2156345c2842SMi Jinlong 2157345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2158345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2159345c2842SMi Jinlong status = nfserr_clientid_busy; 2160345c2842SMi Jinlong goto out; 2161345c2842SMi Jinlong } 2162345c2842SMi Jinlong } else if (unconf) 2163345c2842SMi Jinlong clp = unconf; 2164345c2842SMi Jinlong else { 2165345c2842SMi Jinlong status = nfserr_stale_clientid; 2166345c2842SMi Jinlong goto out; 2167345c2842SMi Jinlong } 2168345c2842SMi Jinlong 2169345c2842SMi Jinlong expire_client(clp); 2170345c2842SMi Jinlong out: 2171345c2842SMi Jinlong nfs4_unlock_state(); 2172345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2173345c2842SMi Jinlong return status; 2174345c2842SMi Jinlong } 2175345c2842SMi Jinlong 2176069b6ad4SAndy Adamson __be32 21774dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 21784dc6ec00SJ. Bruce Fields { 217957b7b43bSJ. Bruce Fields __be32 status = 0; 2180bcecf1ccSMi Jinlong 21814dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 21824dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 21834dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 21844dc6ec00SJ. Bruce Fields /* 21854dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 21864dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 21874dc6ec00SJ. Bruce Fields */ 21884dc6ec00SJ. Bruce Fields return nfs_ok; 21894dc6ec00SJ. Bruce Fields } 2190bcecf1ccSMi Jinlong 21914dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2192bcecf1ccSMi Jinlong status = nfserr_complete_already; 2193a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2194a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2195bcecf1ccSMi Jinlong goto out; 2196bcecf1ccSMi Jinlong 2197bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2198bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 21994dc6ec00SJ. Bruce Fields /* 22004dc6ec00SJ. Bruce Fields * The following error isn't really legal. 22014dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 22024dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 22034dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 22044dc6ec00SJ. Bruce Fields * client. 22054dc6ec00SJ. Bruce Fields */ 2206bcecf1ccSMi Jinlong goto out; 2207bcecf1ccSMi Jinlong 2208bcecf1ccSMi Jinlong status = nfs_ok; 22092a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2210bcecf1ccSMi Jinlong out: 22114dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2212bcecf1ccSMi Jinlong return status; 22134dc6ec00SJ. Bruce Fields } 22144dc6ec00SJ. Bruce Fields 22154dc6ec00SJ. Bruce Fields __be32 2216b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2217b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 22181da177e4SLinus Torvalds { 2219a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 22201da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 222128ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2222b37ad28bSAl Viro __be32 status; 2223c212cecfSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2224a55370a3SNeilBrown 222563db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 22261da177e4SLinus Torvalds nfs4_lock_state(); 2227*382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&clname, nn); 222828ce6054SNeilBrown if (conf) { 222963db4632SJ. Bruce Fields /* case 0: */ 22301da177e4SLinus Torvalds status = nfserr_clid_inuse; 2231e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2232e203d506SJ. Bruce Fields goto out; 2233026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2234363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2235363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2236363168b4SJeff Layton sizeof(addr_str)); 2237026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2238363168b4SJeff Layton "at %s\n", addr_str); 22391da177e4SLinus Torvalds goto out; 22401da177e4SLinus Torvalds } 22411da177e4SLinus Torvalds } 2242ac55fdc4SJeff Layton unconf = find_unconfirmed_client_by_name(&clname); 22431da177e4SLinus Torvalds if (unconf) 22441da177e4SLinus Torvalds expire_client(unconf); 22458f930711SJ. Bruce Fields status = nfserr_jukebox; 22462216d449SJeff Layton new = create_client(clname, rqstp, &clverifier); 2247a55370a3SNeilBrown if (new == NULL) 22481da177e4SLinus Torvalds goto out; 224934b232bbSJ. Bruce Fields if (conf && same_verf(&conf->cl_verifier, &clverifier)) 225063db4632SJ. Bruce Fields /* case 1: probable callback update */ 22511da177e4SLinus Torvalds copy_clid(new, conf); 225234b232bbSJ. Bruce Fields else /* case 4 (new client) or cases 2, 3 (client reboot): */ 2253c212cecfSStanislav Kinsbursky gen_clid(new, nn); 22548323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 22556f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2256ac55fdc4SJeff Layton add_to_unconfirmed(new); 22571da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 22581da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 22591da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22601da177e4SLinus Torvalds status = nfs_ok; 22611da177e4SLinus Torvalds out: 22621da177e4SLinus Torvalds nfs4_unlock_state(); 22631da177e4SLinus Torvalds return status; 22641da177e4SLinus Torvalds } 22651da177e4SLinus Torvalds 22661da177e4SLinus Torvalds 2267b37ad28bSAl Viro __be32 2268b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2269b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2270b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22711da177e4SLinus Torvalds { 227221ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22731da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22741da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2275b37ad28bSAl Viro __be32 status; 22767f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 22771da177e4SLinus Torvalds 22782c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 22791da177e4SLinus Torvalds return nfserr_stale_clientid; 22801da177e4SLinus Torvalds nfs4_lock_state(); 228121ab45a4SNeilBrown 22828daae4dcSStanislav Kinsbursky conf = find_confirmed_client(clid, false, nn); 2283d15c077eSJ. Bruce Fields unconf = find_unconfirmed_client(clid, false); 2284a186e767SJ. Bruce Fields /* 22858695b90aSJ. Bruce Fields * We try hard to give out unique clientid's, so if we get an 22868695b90aSJ. Bruce Fields * attempt to confirm the same clientid with a different cred, 22878695b90aSJ. Bruce Fields * there's a bug somewhere. Let's charitably assume it's our 22888695b90aSJ. Bruce Fields * bug. 2289a186e767SJ. Bruce Fields */ 22908695b90aSJ. Bruce Fields status = nfserr_serverfault; 22918695b90aSJ. Bruce Fields if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) 22928695b90aSJ. Bruce Fields goto out; 22938695b90aSJ. Bruce Fields if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22948695b90aSJ. Bruce Fields goto out; 229563db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 229690d700b7SJ. Bruce Fields if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { 229790d700b7SJ. Bruce Fields if (conf && !unconf) /* case 2: probable retransmit */ 229890d700b7SJ. Bruce Fields status = nfs_ok; 229990d700b7SJ. Bruce Fields else /* case 4: client hasn't noticed we rebooted yet? */ 230090d700b7SJ. Bruce Fields status = nfserr_stale_clientid; 230190d700b7SJ. Bruce Fields goto out; 230290d700b7SJ. Bruce Fields } 230390d700b7SJ. Bruce Fields status = nfs_ok; 230490d700b7SJ. Bruce Fields if (conf) { /* case 1: callback update */ 23055a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 23065a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 23071a69c179SNeilBrown expire_client(unconf); 230890d700b7SJ. Bruce Fields } else { /* case 3: normal case; new or rebooted client */ 2309*382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&unconf->cl_name, nn); 23100d22f68fSJ. Bruce Fields if (conf) 23111a69c179SNeilBrown expire_client(conf); 23121da177e4SLinus Torvalds move_to_confirmed(unconf); 2313f3d03b92SJ. Bruce Fields nfsd4_probe_callback(unconf); 231408e8987cSNeilBrown } 23151da177e4SLinus Torvalds out: 23161da177e4SLinus Torvalds nfs4_unlock_state(); 23171da177e4SLinus Torvalds return status; 23181da177e4SLinus Torvalds } 23191da177e4SLinus Torvalds 232032513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 23211da177e4SLinus Torvalds { 232232513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 232332513b40SJ. Bruce Fields } 232432513b40SJ. Bruce Fields 232532513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 232632513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 232732513b40SJ. Bruce Fields { 23281da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23291da177e4SLinus Torvalds 23308b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 23311da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 23328beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 23338beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 23341da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 233547f9940cSMeelap Shah fp->fi_had_conflict = false; 2336acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2337f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2338f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 233947cee541SPavel Emelyanov spin_lock(&recall_lock); 234047cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 234147cee541SPavel Emelyanov spin_unlock(&recall_lock); 23421da177e4SLinus Torvalds } 23431da177e4SLinus Torvalds 23441da177e4SLinus Torvalds static void 2345e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2346e60d4398SNeilBrown { 2347e60d4398SNeilBrown if (*slab == NULL) 2348e60d4398SNeilBrown return; 23491a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2350e60d4398SNeilBrown *slab = NULL; 2351e60d4398SNeilBrown } 2352e60d4398SNeilBrown 2353e8ff2a84SJ. Bruce Fields void 2354e60d4398SNeilBrown nfsd4_free_slabs(void) 2355e60d4398SNeilBrown { 2356fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2357fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2358e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23595ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23605b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2361e60d4398SNeilBrown } 23621da177e4SLinus Torvalds 236372083396SBryan Schumaker int 23641da177e4SLinus Torvalds nfsd4_init_slabs(void) 23651da177e4SLinus Torvalds { 2366fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2367fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2368fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2369fe0750e5SJ. Bruce Fields goto out_nomem; 2370fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 23713c40794bSYanchuan Nian sizeof(struct nfs4_lockowner), 0, 0, NULL); 2372fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2373e60d4398SNeilBrown goto out_nomem; 2374e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 237520c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2376e60d4398SNeilBrown if (file_slab == NULL) 2377e60d4398SNeilBrown goto out_nomem; 23785ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2379dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23805ac049acSNeilBrown if (stateid_slab == NULL) 23815ac049acSNeilBrown goto out_nomem; 23825b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 238320c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23845b2d21c1SNeilBrown if (deleg_slab == NULL) 23855b2d21c1SNeilBrown goto out_nomem; 2386e60d4398SNeilBrown return 0; 2387e60d4398SNeilBrown out_nomem: 2388e60d4398SNeilBrown nfsd4_free_slabs(); 23891da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23901da177e4SLinus Torvalds return -ENOMEM; 23911da177e4SLinus Torvalds } 23921da177e4SLinus Torvalds 2393fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23941da177e4SLinus Torvalds { 2395fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2396fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2397fe0750e5SJ. Bruce Fields } 2398fe0750e5SJ. Bruce Fields 2399fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2400fe0750e5SJ. Bruce Fields { 2401fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2402fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 24031da177e4SLinus Torvalds } 24041da177e4SLinus Torvalds 2405ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2406ff194bd9SJ. Bruce Fields { 2407ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2408ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2409ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2410ff194bd9SJ. Bruce Fields } 2411ff194bd9SJ. Bruce Fields 2412fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 24131da177e4SLinus Torvalds { 24141da177e4SLinus Torvalds struct nfs4_stateowner *sop; 24151da177e4SLinus Torvalds 2416fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2417ff194bd9SJ. Bruce Fields if (!sop) 2418ff194bd9SJ. Bruce Fields return NULL; 2419ff194bd9SJ. Bruce Fields 2420ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2421ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2422fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2423ff194bd9SJ. Bruce Fields return NULL; 2424ff194bd9SJ. Bruce Fields } 24251da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2426ff194bd9SJ. Bruce Fields 2427ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2428ff194bd9SJ. Bruce Fields sop->so_client = clp; 2429ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 24301da177e4SLinus Torvalds return sop; 24311da177e4SLinus Torvalds } 2432ff194bd9SJ. Bruce Fields 2433fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2434ff194bd9SJ. Bruce Fields { 243516bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2436fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 24371da177e4SLinus Torvalds } 24381da177e4SLinus Torvalds 2439fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24401da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2441fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 24421da177e4SLinus Torvalds 2443fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2444fe0750e5SJ. Bruce Fields if (!oo) 24451da177e4SLinus Torvalds return NULL; 2446fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2447fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2448d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2449fe0750e5SJ. Bruce Fields oo->oo_time = 0; 245038c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2451fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2452fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2453fe0750e5SJ. Bruce Fields return oo; 24541da177e4SLinus Torvalds } 24551da177e4SLinus Torvalds 2456996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2457fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2458d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24591da177e4SLinus Torvalds 2460996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2461ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2462fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24638beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2464fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 246513cd2184SNeilBrown get_nfs4_file(fp); 24661da177e4SLinus Torvalds stp->st_file = fp; 24671da177e4SLinus Torvalds stp->st_access_bmap = 0; 24681da177e4SLinus Torvalds stp->st_deny_bmap = 0; 246982c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2470ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 24714c4cd222SNeilBrown stp->st_openstp = NULL; 24721da177e4SLinus Torvalds } 24731da177e4SLinus Torvalds 24741da177e4SLinus Torvalds static void 2475fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24761da177e4SLinus Torvalds { 2477fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24781da177e4SLinus Torvalds 2479fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2480fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24811da177e4SLinus Torvalds } 24821da177e4SLinus Torvalds 24831da177e4SLinus Torvalds static int 2484599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2485599e0a22SJ. Bruce Fields clientid_t *clid) 2486599e0a22SJ. Bruce Fields { 2487599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2488599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2489599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24901da177e4SLinus Torvalds } 24911da177e4SLinus Torvalds 2492fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 2493d15c077eSJ. Bruce Fields find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, bool sessions) 24941da177e4SLinus Torvalds { 2495a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2496a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 2497d15c077eSJ. Bruce Fields struct nfs4_client *clp; 24981da177e4SLinus Torvalds 249916bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 250016bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 250116bfdaafSJ. Bruce Fields continue; 2502a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2503a50d2ad1SJ. Bruce Fields oo = openowner(so); 2504d15c077eSJ. Bruce Fields clp = oo->oo_owner.so_client; 2505d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 2506d15c077eSJ. Bruce Fields return NULL; 2507a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2508a50d2ad1SJ. Bruce Fields return oo; 2509a50d2ad1SJ. Bruce Fields } 25101da177e4SLinus Torvalds } 25111da177e4SLinus Torvalds return NULL; 25121da177e4SLinus Torvalds } 25131da177e4SLinus Torvalds 25141da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 25151da177e4SLinus Torvalds static struct nfs4_file * 25161da177e4SLinus Torvalds find_file(struct inode *ino) 25171da177e4SLinus Torvalds { 25181da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 25191da177e4SLinus Torvalds struct nfs4_file *fp; 25201da177e4SLinus Torvalds 25218b671b80SJ. Bruce Fields spin_lock(&recall_lock); 25221da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 252313cd2184SNeilBrown if (fp->fi_inode == ino) { 252413cd2184SNeilBrown get_nfs4_file(fp); 25258b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25261da177e4SLinus Torvalds return fp; 25271da177e4SLinus Torvalds } 252813cd2184SNeilBrown } 25298b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25301da177e4SLinus Torvalds return NULL; 25311da177e4SLinus Torvalds } 25321da177e4SLinus Torvalds 25334f83aa30SJ. Bruce Fields /* 25341da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 25351da177e4SLinus Torvalds * WRITE with all zero or all one stateid 25361da177e4SLinus Torvalds */ 2537b37ad28bSAl Viro static __be32 25381da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 25391da177e4SLinus Torvalds { 25401da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25411da177e4SLinus Torvalds struct nfs4_file *fp; 2542dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2543b37ad28bSAl Viro __be32 ret; 25441da177e4SLinus Torvalds 25451da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 25461da177e4SLinus Torvalds 25471da177e4SLinus Torvalds fp = find_file(ino); 254813cd2184SNeilBrown if (!fp) 254913cd2184SNeilBrown return nfs_ok; 2550b700949bSNeilBrown ret = nfserr_locked; 25511da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25528beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2553ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2554ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 255513cd2184SNeilBrown goto out; 25561da177e4SLinus Torvalds } 255713cd2184SNeilBrown ret = nfs_ok; 255813cd2184SNeilBrown out: 255913cd2184SNeilBrown put_nfs4_file(fp); 256013cd2184SNeilBrown return ret; 25611da177e4SLinus Torvalds } 25621da177e4SLinus Torvalds 25636b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25641da177e4SLinus Torvalds { 25651da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25661da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25671da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25681da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25691da177e4SLinus Torvalds * it's safe to take a reference: */ 25701da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25711da177e4SLinus Torvalds 25721da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25731da177e4SLinus Torvalds 2574460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25751da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25761da177e4SLinus Torvalds 25776b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25786b57d9c8SJ. Bruce Fields } 25796b57d9c8SJ. Bruce Fields 2580acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25816b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25826b57d9c8SJ. Bruce Fields { 2583acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2584acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25856b57d9c8SJ. Bruce Fields 25867fa10cd1SJ. Bruce Fields if (!fp) { 25877fa10cd1SJ. Bruce Fields WARN(1, "(%p)->fl_owner NULL\n", fl); 25887fa10cd1SJ. Bruce Fields return; 25897fa10cd1SJ. Bruce Fields } 25907fa10cd1SJ. Bruce Fields if (fp->fi_had_conflict) { 25917fa10cd1SJ. Bruce Fields WARN(1, "duplicate break on %p\n", fp); 25927fa10cd1SJ. Bruce Fields return; 25937fa10cd1SJ. Bruce Fields } 25940272e1fdSJ. Bruce Fields /* 25950272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2596acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25976b57d9c8SJ. Bruce Fields * in time: 25980272e1fdSJ. Bruce Fields */ 25990272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 26001da177e4SLinus Torvalds 26015d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2602acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2603acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 26045d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 26055d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 26061da177e4SLinus Torvalds } 26071da177e4SLinus Torvalds 26081da177e4SLinus Torvalds static 26091da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 26101da177e4SLinus Torvalds { 26111da177e4SLinus Torvalds if (arg & F_UNLCK) 26121da177e4SLinus Torvalds return lease_modify(onlist, arg); 26131da177e4SLinus Torvalds else 26141da177e4SLinus Torvalds return -EAGAIN; 26151da177e4SLinus Torvalds } 26161da177e4SLinus Torvalds 26177b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 26188fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 26198fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 26201da177e4SLinus Torvalds }; 26211da177e4SLinus Torvalds 26227a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 26237a8711c9SJ. Bruce Fields { 26247a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 26257a8711c9SJ. Bruce Fields return nfs_ok; 26267a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 26277a8711c9SJ. Bruce Fields return nfserr_replay_me; 26287a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 26297a8711c9SJ. Bruce Fields return nfs_ok; 26307a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 26317a8711c9SJ. Bruce Fields } 26321da177e4SLinus Torvalds 2633b37ad28bSAl Viro __be32 26346668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 26356668958fSAndy Adamson struct nfsd4_open *open) 26361da177e4SLinus Torvalds { 26371da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 26381da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 26391da177e4SLinus Torvalds unsigned int strhashval; 2640fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 26414cdc951bSJ. Bruce Fields __be32 status; 26422c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 26431da177e4SLinus Torvalds 26442c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&open->op_clientid, nn)) 26451da177e4SLinus Torvalds return nfserr_stale_clientid; 264632513b40SJ. Bruce Fields /* 264732513b40SJ. Bruce Fields * In case we need it later, after we've already created the 264832513b40SJ. Bruce Fields * file and don't want to risk a further failure: 264932513b40SJ. Bruce Fields */ 265032513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 265132513b40SJ. Bruce Fields if (open->op_file == NULL) 265232513b40SJ. Bruce Fields return nfserr_jukebox; 26531da177e4SLinus Torvalds 265416bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2655d15c077eSJ. Bruce Fields oo = find_openstateowner_str(strhashval, open, cstate->minorversion); 2656fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2657fe0750e5SJ. Bruce Fields if (!oo) { 26588daae4dcSStanislav Kinsbursky clp = find_confirmed_client(clientid, cstate->minorversion, 26598daae4dcSStanislav Kinsbursky nn); 26600f442aa2SJ. Bruce Fields if (clp == NULL) 26610f442aa2SJ. Bruce Fields return nfserr_expired; 2662bcf130f9SJ. Bruce Fields goto new_owner; 26630f442aa2SJ. Bruce Fields } 2664dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26650f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2666fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2667fe0750e5SJ. Bruce Fields release_openowner(oo); 2668fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2669bcf130f9SJ. Bruce Fields goto new_owner; 26700f442aa2SJ. Bruce Fields } 26714cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26724cdc951bSJ. Bruce Fields if (status) 26734cdc951bSJ. Bruce Fields return status; 26744cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26754cdc951bSJ. Bruce Fields goto alloc_stateid; 2676bcf130f9SJ. Bruce Fields new_owner: 2677fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2678fe0750e5SJ. Bruce Fields if (oo == NULL) 26793e772463SJ. Bruce Fields return nfserr_jukebox; 2680fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26814cdc951bSJ. Bruce Fields alloc_stateid: 26824cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26834cdc951bSJ. Bruce Fields if (!open->op_stp) 26844cdc951bSJ. Bruce Fields return nfserr_jukebox; 26850f442aa2SJ. Bruce Fields return nfs_ok; 26861da177e4SLinus Torvalds } 26871da177e4SLinus Torvalds 2688b37ad28bSAl Viro static inline __be32 26894a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26904a6e43e6SNeilBrown { 26914a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26924a6e43e6SNeilBrown return nfserr_openmode; 26934a6e43e6SNeilBrown else 26944a6e43e6SNeilBrown return nfs_ok; 26954a6e43e6SNeilBrown } 26964a6e43e6SNeilBrown 2697c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 269824a0111eSJ. Bruce Fields { 269924a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 270024a0111eSJ. Bruce Fields } 270124a0111eSJ. Bruce Fields 270238c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2703f459e453SJ. Bruce Fields { 2704f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2705f459e453SJ. Bruce Fields 270638c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2707f459e453SJ. Bruce Fields if (!ret) 2708f459e453SJ. Bruce Fields return NULL; 2709f459e453SJ. Bruce Fields return delegstateid(ret); 2710f459e453SJ. Bruce Fields } 2711f459e453SJ. Bruce Fields 27128b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 27138b289b2cSJ. Bruce Fields { 27148b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 27158b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 27168b289b2cSJ. Bruce Fields } 27178b289b2cSJ. Bruce Fields 2718b37ad28bSAl Viro static __be32 271938c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2720567d9829SNeilBrown struct nfs4_delegation **dp) 2721567d9829SNeilBrown { 2722567d9829SNeilBrown int flags; 2723b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2724567d9829SNeilBrown 272538c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2726567d9829SNeilBrown if (*dp == NULL) 2727c44c5eebSNeilBrown goto out; 272824a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2729567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2730567d9829SNeilBrown if (status) 2731567d9829SNeilBrown *dp = NULL; 2732c44c5eebSNeilBrown out: 27338b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2734c44c5eebSNeilBrown return nfs_ok; 2735c44c5eebSNeilBrown if (status) 2736c44c5eebSNeilBrown return status; 2737dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2738c44c5eebSNeilBrown return nfs_ok; 2739567d9829SNeilBrown } 2740567d9829SNeilBrown 2741b37ad28bSAl Viro static __be32 2742dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 27431da177e4SLinus Torvalds { 2744dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2745fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 27461da177e4SLinus Torvalds 27478beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 27481da177e4SLinus Torvalds /* ignore lock owners */ 27491da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 27501da177e4SLinus Torvalds continue; 27511da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2752fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 27531da177e4SLinus Torvalds *stpp = local; 27541da177e4SLinus Torvalds /* check for conflicting share reservations */ 27551da177e4SLinus Torvalds if (!test_share(local, open)) 275677eaae8dSJ. Bruce Fields return nfserr_share_denied; 27571da177e4SLinus Torvalds } 275877eaae8dSJ. Bruce Fields return nfs_ok; 27591da177e4SLinus Torvalds } 27601da177e4SLinus Torvalds 276121fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 276221fb4016SJ. Bruce Fields { 276321fb4016SJ. Bruce Fields int flags = 0; 276421fb4016SJ. Bruce Fields 276521fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 276621fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 276721fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 276821fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 276921fb4016SJ. Bruce Fields return flags; 277021fb4016SJ. Bruce Fields } 277121fb4016SJ. Bruce Fields 27720c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27730c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2774f9d7562fSJ. Bruce Fields { 2775f9d7562fSJ. Bruce Fields __be32 status; 27760c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27770c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27780c12eaffSCasey Bodley 2779f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2780f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2781f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2782f9d7562fSJ. Bruce Fields if (status) 2783f9d7562fSJ. Bruce Fields return status; 2784f9d7562fSJ. Bruce Fields } 2785f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2786f9d7562fSJ. Bruce Fields 2787f9d7562fSJ. Bruce Fields return nfs_ok; 2788f9d7562fSJ. Bruce Fields } 2789f9d7562fSJ. Bruce Fields 2790b37ad28bSAl Viro static inline __be32 27911da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27921da177e4SLinus Torvalds struct nfsd4_open *open) 27931da177e4SLinus Torvalds { 27941da177e4SLinus Torvalds struct iattr iattr = { 27951da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27961da177e4SLinus Torvalds .ia_size = 0, 27971da177e4SLinus Torvalds }; 27981da177e4SLinus Torvalds if (!open->op_truncate) 27991da177e4SLinus Torvalds return 0; 28001da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 28019246585aSAl Viro return nfserr_inval; 28021da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 28031da177e4SLinus Torvalds } 28041da177e4SLinus Torvalds 2805b37ad28bSAl Viro static __be32 2806dcef0413SJ. 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) 28071da177e4SLinus Torvalds { 2808b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 28097d947842SJ. Bruce Fields bool new_access; 2810b37ad28bSAl Viro __be32 status; 28111da177e4SLinus Torvalds 281282c5ff1bSJeff Layton new_access = !test_access(op_share_access, stp); 2813f9d7562fSJ. Bruce Fields if (new_access) { 28140c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2815f9d7562fSJ. Bruce Fields if (status) 2816f9d7562fSJ. Bruce Fields return status; 28176c26d08fSJ. Bruce Fields } 28181da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 28191da177e4SLinus Torvalds if (status) { 2820f9d7562fSJ. Bruce Fields if (new_access) { 2821f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2822f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2823f9d7562fSJ. Bruce Fields } 28241da177e4SLinus Torvalds return status; 28251da177e4SLinus Torvalds } 28261da177e4SLinus Torvalds /* remember the open */ 282782c5ff1bSJeff Layton set_access(op_share_access, stp); 2828ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 28291da177e4SLinus Torvalds 28301da177e4SLinus Torvalds return nfs_ok; 28311da177e4SLinus Torvalds } 28321da177e4SLinus Torvalds 28331da177e4SLinus Torvalds 28341da177e4SLinus Torvalds static void 28351255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 28361da177e4SLinus Torvalds { 2837dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 28381da177e4SLinus Torvalds } 28391da177e4SLinus Torvalds 284014a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 284114a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 284214a24e99SJ. Bruce Fields { 284314a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 284414a24e99SJ. Bruce Fields return true; 284514a24e99SJ. Bruce Fields /* 284614a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 284714a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 284814a24e99SJ. Bruce Fields * until we hear otherwise: 284914a24e99SJ. Bruce Fields */ 285014a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 285114a24e99SJ. Bruce Fields } 285214a24e99SJ. Bruce Fields 285322d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 285422d38c4cSJ. Bruce Fields { 285522d38c4cSJ. Bruce Fields struct file_lock *fl; 285622d38c4cSJ. Bruce Fields 285722d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 285822d38c4cSJ. Bruce Fields if (!fl) 285922d38c4cSJ. Bruce Fields return NULL; 286022d38c4cSJ. Bruce Fields locks_init_lock(fl); 286122d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 286222d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 286322d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 286422d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2865acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 286622d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 286722d38c4cSJ. Bruce Fields return fl; 286822d38c4cSJ. Bruce Fields } 286922d38c4cSJ. Bruce Fields 2870edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2871edab9782SJ. Bruce Fields { 2872acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2873edab9782SJ. Bruce Fields struct file_lock *fl; 2874edab9782SJ. Bruce Fields int status; 2875edab9782SJ. Bruce Fields 2876edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2877edab9782SJ. Bruce Fields if (!fl) 2878edab9782SJ. Bruce Fields return -ENOMEM; 2879acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28802a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2881acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2882edab9782SJ. Bruce Fields if (status) { 2883acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2884edab9782SJ. Bruce Fields locks_free_lock(fl); 2885edab9782SJ. Bruce Fields return -ENOMEM; 2886edab9782SJ. Bruce Fields } 2887acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2888cb0942b8SAl Viro fp->fi_deleg_file = get_file(fl->fl_file); 2889acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2890acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2891acfdf5c3SJ. Bruce Fields return 0; 2892acfdf5c3SJ. Bruce Fields } 2893acfdf5c3SJ. Bruce Fields 2894acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2895acfdf5c3SJ. Bruce Fields { 2896acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2897acfdf5c3SJ. Bruce Fields 2898acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2899acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2900acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2901acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2902acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2903acfdf5c3SJ. Bruce Fields return -EAGAIN; 2904acfdf5c3SJ. Bruce Fields } 2905acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2906acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2907acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 29082a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2909edab9782SJ. Bruce Fields return 0; 2910edab9782SJ. Bruce Fields } 2911edab9782SJ. Bruce Fields 29124aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 29134aa8913cSBenny Halevy { 29144aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 29154aa8913cSBenny Halevy if (status == -EAGAIN) 29164aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 29174aa8913cSBenny Halevy else { 29184aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 29194aa8913cSBenny Halevy switch (open->op_deleg_want) { 29204aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 29214aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 29224aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 29234aa8913cSBenny Halevy break; 29244aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 29254aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 29264aa8913cSBenny Halevy break; 29274aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 29284aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 29294aa8913cSBenny Halevy } 29304aa8913cSBenny Halevy } 29314aa8913cSBenny Halevy } 29324aa8913cSBenny Halevy 29331da177e4SLinus Torvalds /* 29341da177e4SLinus Torvalds * Attempt to hand out a delegation. 29351da177e4SLinus Torvalds */ 29361da177e4SLinus Torvalds static void 29375ccb0066SStanislav Kinsbursky nfs4_open_delegation(struct net *net, struct svc_fh *fh, 29385ccb0066SStanislav Kinsbursky struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 29391da177e4SLinus Torvalds { 29401da177e4SLinus Torvalds struct nfs4_delegation *dp; 2941fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 294214a24e99SJ. Bruce Fields int cb_up; 2943d24433cdSBenny Halevy int status = 0, flag = 0; 29441da177e4SLinus Torvalds 2945fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 29461da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 29477b190fecSNeilBrown open->op_recall = 0; 29487b190fecSNeilBrown switch (open->op_claim_type) { 29497b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29502bf23875SJ. Bruce Fields if (!cb_up) 29517b190fecSNeilBrown open->op_recall = 1; 29527b190fecSNeilBrown flag = open->op_delegate_type; 29537b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29541da177e4SLinus Torvalds goto out; 29557b190fecSNeilBrown break; 29567b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29577b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29587b190fecSNeilBrown * had the chance to reclaim theirs.... */ 29595ccb0066SStanislav Kinsbursky if (locks_in_grace(net)) 29607b190fecSNeilBrown goto out; 2961dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29627b190fecSNeilBrown goto out; 29631da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29641da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29651da177e4SLinus Torvalds else 29661da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29677b190fecSNeilBrown break; 29687b190fecSNeilBrown default: 29697b190fecSNeilBrown goto out; 29707b190fecSNeilBrown } 29711da177e4SLinus Torvalds 2972fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2973dd239cc0SJ. Bruce Fields if (dp == NULL) 2974dd239cc0SJ. Bruce Fields goto out_no_deleg; 2975acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2976edab9782SJ. Bruce Fields if (status) 2977dd239cc0SJ. Bruce Fields goto out_free; 29781da177e4SLinus Torvalds 2979d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29801da177e4SLinus Torvalds 29818c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2982d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29831da177e4SLinus Torvalds out: 29841da177e4SLinus Torvalds open->op_delegate_type = flag; 2985d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2986d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2987d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2988d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2989d24433cdSBenny Halevy 29904aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29914aa8913cSBenny Halevy if (open->op_deleg_want) 29924aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2993d24433cdSBenny Halevy } 2994dd239cc0SJ. Bruce Fields return; 2995dd239cc0SJ. Bruce Fields out_free: 2996acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2997dd239cc0SJ. Bruce Fields out_no_deleg: 2998dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2999dd239cc0SJ. Bruce Fields goto out; 30001da177e4SLinus Torvalds } 30011da177e4SLinus Torvalds 3002e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 3003e27f49c3SBenny Halevy struct nfs4_delegation *dp) 3004e27f49c3SBenny Halevy { 3005e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 3006e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3007e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3008e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 3009e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 3010e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3011e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3012e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 3013e27f49c3SBenny Halevy } 3014e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 3015e27f49c3SBenny Halevy * it already has, therefore we don't return 3016e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 3017e27f49c3SBenny Halevy */ 3018e27f49c3SBenny Halevy } 3019e27f49c3SBenny Halevy 30201da177e4SLinus Torvalds /* 30211da177e4SLinus Torvalds * called with nfs4_lock_state() held. 30221da177e4SLinus Torvalds */ 3023b37ad28bSAl Viro __be32 30241da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 30251da177e4SLinus Torvalds { 30266668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 302738c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 30281da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 30291da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3030dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 3031567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 3032b37ad28bSAl Viro __be32 status; 30331da177e4SLinus Torvalds 30341da177e4SLinus Torvalds /* 30351da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 30361da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 30371da177e4SLinus Torvalds * If not found, create the nfs4_file struct 30381da177e4SLinus Torvalds */ 30391da177e4SLinus Torvalds fp = find_file(ino); 30401da177e4SLinus Torvalds if (fp) { 30411da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 30421da177e4SLinus Torvalds goto out; 304338c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 3044c44c5eebSNeilBrown if (status) 3045c44c5eebSNeilBrown goto out; 30461da177e4SLinus Torvalds } else { 3047c44c5eebSNeilBrown status = nfserr_bad_stateid; 30488b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3049c44c5eebSNeilBrown goto out; 30503e772463SJ. Bruce Fields status = nfserr_jukebox; 305132513b40SJ. Bruce Fields fp = open->op_file; 305232513b40SJ. Bruce Fields open->op_file = NULL; 305332513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30541da177e4SLinus Torvalds } 30551da177e4SLinus Torvalds 30561da177e4SLinus Torvalds /* 30571da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30581da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30591da177e4SLinus Torvalds */ 30601da177e4SLinus Torvalds if (stp) { 30611da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3062f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30631da177e4SLinus Torvalds if (status) 30641da177e4SLinus Torvalds goto out; 30651da177e4SLinus Torvalds } else { 30664cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3067567d9829SNeilBrown if (status) 30681da177e4SLinus Torvalds goto out; 30694af82504SJ. Bruce Fields status = nfsd4_truncate(rqstp, current_fh, open); 30704af82504SJ. Bruce Fields if (status) 30714af82504SJ. Bruce Fields goto out; 30724cdc951bSJ. Bruce Fields stp = open->op_stp; 30734cdc951bSJ. Bruce Fields open->op_stp = NULL; 3074996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30751da177e4SLinus Torvalds } 3076dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3077dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30781da177e4SLinus Torvalds 3079d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3080dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30816668958fSAndy Adamson 3082d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3083d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3084d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3085d24433cdSBenny Halevy goto nodeleg; 3086d24433cdSBenny Halevy } 3087d24433cdSBenny Halevy } 3088d24433cdSBenny Halevy 30891da177e4SLinus Torvalds /* 30901da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30911da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30921da177e4SLinus Torvalds */ 30935ccb0066SStanislav Kinsbursky nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); 3094d24433cdSBenny Halevy nodeleg: 30951da177e4SLinus Torvalds status = nfs_ok; 30961da177e4SLinus Torvalds 30978c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3098dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30991da177e4SLinus Torvalds out: 3100d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3101d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3102e27f49c3SBenny Halevy open->op_deleg_want) 3103e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3104d24433cdSBenny Halevy 310513cd2184SNeilBrown if (fp) 310613cd2184SNeilBrown put_nfs4_file(fp); 310737515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 31081255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 31091da177e4SLinus Torvalds /* 31101da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 31111da177e4SLinus Torvalds */ 31121da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3113dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 31146668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 31151da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 31161da177e4SLinus Torvalds 31171da177e4SLinus Torvalds return status; 31181da177e4SLinus Torvalds } 31191da177e4SLinus Torvalds 3120d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3121d29b20cdSJ. Bruce Fields { 3122d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3123d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3124d29b20cdSJ. Bruce Fields 3125d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3126d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3127d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3128d29b20cdSJ. Bruce Fields if (status) { 3129d29b20cdSJ. Bruce Fields release_openowner(oo); 3130d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3131d29b20cdSJ. Bruce Fields } else 3132d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3133d29b20cdSJ. Bruce Fields } 3134d29b20cdSJ. Bruce Fields } 313532513b40SJ. Bruce Fields if (open->op_file) 313632513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 31374cdc951bSJ. Bruce Fields if (open->op_stp) 3138ef79859eSJ. Bruce Fields free_generic_stateid(open->op_stp); 3139d29b20cdSJ. Bruce Fields } 3140d29b20cdSJ. Bruce Fields 3141b37ad28bSAl Viro __be32 3142b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3143b591480bSJ.Bruce Fields clientid_t *clid) 31441da177e4SLinus Torvalds { 31451da177e4SLinus Torvalds struct nfs4_client *clp; 3146b37ad28bSAl Viro __be32 status; 31477f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 31481da177e4SLinus Torvalds 31491da177e4SLinus Torvalds nfs4_lock_state(); 31501da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31511da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31521da177e4SLinus Torvalds status = nfserr_stale_clientid; 31532c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 31541da177e4SLinus Torvalds goto out; 31558daae4dcSStanislav Kinsbursky clp = find_confirmed_client(clid, cstate->minorversion, nn); 31561da177e4SLinus Torvalds status = nfserr_expired; 31571da177e4SLinus Torvalds if (clp == NULL) { 31581da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31591da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31601da177e4SLinus Torvalds goto out; 31611da177e4SLinus Torvalds } 31621da177e4SLinus Torvalds status = nfserr_cb_path_down; 3163ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 316477a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31651da177e4SLinus Torvalds goto out; 31661da177e4SLinus Torvalds status = nfs_ok; 31671da177e4SLinus Torvalds out: 31681da177e4SLinus Torvalds nfs4_unlock_state(); 31691da177e4SLinus Torvalds return status; 31701da177e4SLinus Torvalds } 31711da177e4SLinus Torvalds 3172a76b4319SNeilBrown static void 31735e1533c7SStanislav Kinsbursky nfsd4_end_grace(struct net *net) 3174a76b4319SNeilBrown { 31755e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 31765e1533c7SStanislav Kinsbursky 317733dcc481SJeff Layton /* do nothing if grace period already ended */ 3178a51c84edSStanislav Kinsbursky if (nn->grace_ended) 317933dcc481SJeff Layton return; 318033dcc481SJeff Layton 3181a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 3182a51c84edSStanislav Kinsbursky nn->grace_ended = true; 31832c142baaSStanislav Kinsbursky nfsd4_record_grace_done(net, nn->boot_time); 31845e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 3185e46b498cSJ. Bruce Fields /* 3186e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3187e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3188e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3189e46b498cSJ. Bruce Fields */ 3190e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3191a76b4319SNeilBrown } 3192a76b4319SNeilBrown 3193fd39ca9aSNeilBrown static time_t 31941da177e4SLinus Torvalds nfs4_laundromat(void) 31951da177e4SLinus Torvalds { 31961da177e4SLinus Torvalds struct nfs4_client *clp; 3197fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31981da177e4SLinus Torvalds struct nfs4_delegation *dp; 31991da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3200cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3201cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3202cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 32031da177e4SLinus Torvalds 32041da177e4SLinus Torvalds nfs4_lock_state(); 32051da177e4SLinus Torvalds 32061da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 32075e1533c7SStanislav Kinsbursky nfsd4_end_grace(&init_net); 320836acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 320936acb66bSBenny Halevy spin_lock(&client_lock); 32101da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 32111da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 32121da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 32131da177e4SLinus Torvalds t = clp->cl_time - cutoff; 32141da177e4SLinus Torvalds if (clientid_val > t) 32151da177e4SLinus Torvalds clientid_val = t; 32161da177e4SLinus Torvalds break; 32171da177e4SLinus Torvalds } 3218d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3219d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3220d7682988SBenny Halevy clp->cl_clientid.cl_id); 3221d7682988SBenny Halevy continue; 3222d7682988SBenny Halevy } 3223d7682988SBenny Halevy unhash_client_locked(clp); 3224d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 322536acb66bSBenny Halevy } 322636acb66bSBenny Halevy spin_unlock(&client_lock); 322736acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 322836acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 32291da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 32301da177e4SLinus Torvalds clp->cl_clientid.cl_id); 32311da177e4SLinus Torvalds expire_client(clp); 32321da177e4SLinus Torvalds } 32331da177e4SLinus Torvalds spin_lock(&recall_lock); 32341da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32351da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32361da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 32371da177e4SLinus Torvalds u = dp->dl_time - cutoff; 32381da177e4SLinus Torvalds if (test_val > u) 32391da177e4SLinus Torvalds test_val = u; 32401da177e4SLinus Torvalds break; 32411da177e4SLinus Torvalds } 32421da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32431da177e4SLinus Torvalds } 32441da177e4SLinus Torvalds spin_unlock(&recall_lock); 32451da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32461da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32471da177e4SLinus Torvalds unhash_delegation(dp); 32481da177e4SLinus Torvalds } 3249cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32501da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3251fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3252fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3253fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32541da177e4SLinus Torvalds if (test_val > u) 32551da177e4SLinus Torvalds test_val = u; 32561da177e4SLinus Torvalds break; 32571da177e4SLinus Torvalds } 3258fe0750e5SJ. Bruce Fields release_openowner(oo); 32591da177e4SLinus Torvalds } 32601da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32611da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32621da177e4SLinus Torvalds nfs4_unlock_state(); 32631da177e4SLinus Torvalds return clientid_val; 32641da177e4SLinus Torvalds } 32651da177e4SLinus Torvalds 3266a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3267a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3268a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3269a254b246SHarvey Harrison 3270a254b246SHarvey Harrison static void 3271c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32721da177e4SLinus Torvalds { 32731da177e4SLinus Torvalds time_t t; 32741da177e4SLinus Torvalds 32751da177e4SLinus Torvalds t = nfs4_laundromat(); 32761da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 327758da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32781da177e4SLinus Torvalds } 32791da177e4SLinus Torvalds 3280f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3281f8816512SNeilBrown { 3282f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3283f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3284f7a4d872SJ. Bruce Fields return nfs_ok; 32851da177e4SLinus Torvalds } 32861da177e4SLinus Torvalds 32871da177e4SLinus Torvalds static int 32882c142baaSStanislav Kinsbursky STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) 32891da177e4SLinus Torvalds { 32902c142baaSStanislav Kinsbursky if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) 3291e4e83ea4SJ. Bruce Fields return 0; 32928c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32938c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32941da177e4SLinus Torvalds return 1; 32951da177e4SLinus Torvalds } 32961da177e4SLinus Torvalds 32971da177e4SLinus Torvalds static inline int 329882c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 32991da177e4SLinus Torvalds { 330082c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 330182c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 330282c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 33031da177e4SLinus Torvalds } 33041da177e4SLinus Torvalds 33051da177e4SLinus Torvalds static inline int 330682c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 33071da177e4SLinus Torvalds { 330882c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 330982c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 33101da177e4SLinus Torvalds } 33111da177e4SLinus Torvalds 33121da177e4SLinus Torvalds static 3313dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 33141da177e4SLinus Torvalds { 3315b37ad28bSAl Viro __be32 status = nfserr_openmode; 33161da177e4SLinus Torvalds 331702921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 331802921914SJ. Bruce Fields if (stp->st_openstp) 331902921914SJ. Bruce Fields stp = stp->st_openstp; 332082c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 33211da177e4SLinus Torvalds goto out; 332282c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 33231da177e4SLinus Torvalds goto out; 33241da177e4SLinus Torvalds status = nfs_ok; 33251da177e4SLinus Torvalds out: 33261da177e4SLinus Torvalds return status; 33271da177e4SLinus Torvalds } 33281da177e4SLinus Torvalds 3329b37ad28bSAl Viro static inline __be32 33305ccb0066SStanislav Kinsbursky check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) 33311da177e4SLinus Torvalds { 3332203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 33331da177e4SLinus Torvalds return nfs_ok; 33345ccb0066SStanislav Kinsbursky else if (locks_in_grace(net)) { 333525985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 33361da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 33371da177e4SLinus Torvalds return nfserr_grace; 33381da177e4SLinus Torvalds } else if (flags & WR_STATE) 33391da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33401da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 33411da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 33421da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33431da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 33441da177e4SLinus Torvalds } 33451da177e4SLinus Torvalds 33461da177e4SLinus Torvalds /* 33471da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33481da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33491da177e4SLinus Torvalds */ 33501da177e4SLinus Torvalds static inline int 33515ccb0066SStanislav Kinsbursky grace_disallows_io(struct net *net, struct inode *inode) 33521da177e4SLinus Torvalds { 33535ccb0066SStanislav Kinsbursky return locks_in_grace(net) && mandatory_lock(inode); 33541da177e4SLinus Torvalds } 33551da177e4SLinus Torvalds 335681b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 335781b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 335881b82965SJ. Bruce Fields { 335981b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 336081b82965SJ. Bruce Fields } 336181b82965SJ. Bruce Fields 336257b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33630836f587SJ. Bruce Fields { 33646668958fSAndy Adamson /* 33656668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33666668958fSAndy Adamson * when it is zero. 33676668958fSAndy Adamson */ 336828dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 336981b82965SJ. Bruce Fields return nfs_ok; 337081b82965SJ. Bruce Fields 337181b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 337281b82965SJ. Bruce Fields return nfs_ok; 33736668958fSAndy Adamson 33740836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 337581b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33760836f587SJ. Bruce Fields return nfserr_bad_stateid; 33770836f587SJ. Bruce Fields /* 337881b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 337981b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 338081b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 338181b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 338281b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 338381b82965SJ. Bruce Fields * but better performance may result in retrying IO that 338481b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 338581b82965SJ. Bruce Fields * reordered in flight: 33860836f587SJ. Bruce Fields */ 33870836f587SJ. Bruce Fields return nfserr_old_stateid; 33880836f587SJ. Bruce Fields } 33890836f587SJ. Bruce Fields 33907df302f7SChuck Lever static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 339117456804SBryan Schumaker { 339297b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 339397b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 339497b7e3b6SJ. Bruce Fields __be32 status; 339517456804SBryan Schumaker 33967df302f7SChuck Lever if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 33977df302f7SChuck Lever return nfserr_bad_stateid; 33987df302f7SChuck Lever /* Client debugging aid. */ 33997df302f7SChuck Lever if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { 34007df302f7SChuck Lever char addr_str[INET6_ADDRSTRLEN]; 34017df302f7SChuck Lever rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, 34027df302f7SChuck Lever sizeof(addr_str)); 34037df302f7SChuck Lever pr_warn_ratelimited("NFSD: client %s testing state ID " 34047df302f7SChuck Lever "with incorrect client ID\n", addr_str); 34057df302f7SChuck Lever return nfserr_bad_stateid; 34067df302f7SChuck Lever } 340738c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 340897b7e3b6SJ. Bruce Fields if (!s) 34097df302f7SChuck Lever return nfserr_bad_stateid; 341036279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 341117456804SBryan Schumaker if (status) 341217456804SBryan Schumaker return status; 341397b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 341497b7e3b6SJ. Bruce Fields return nfs_ok; 341597b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 341697b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3417dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 341897b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 341997b7e3b6SJ. Bruce Fields return nfs_ok; 342017456804SBryan Schumaker } 342117456804SBryan Schumaker 3422d15c077eSJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s, bool sessions) 342338c2f4b1SJ. Bruce Fields { 342438c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 34252c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 342638c2f4b1SJ. Bruce Fields 342738c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 342838c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 34292c142baaSStanislav Kinsbursky if (STALE_STATEID(stateid, nn)) 343038c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 34318daae4dcSStanislav Kinsbursky cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions, nn); 343238c2f4b1SJ. Bruce Fields if (!cl) 343338c2f4b1SJ. Bruce Fields return nfserr_expired; 343438c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 343538c2f4b1SJ. Bruce Fields if (!*s) 343638c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 343738c2f4b1SJ. Bruce Fields return nfs_ok; 343838c2f4b1SJ. Bruce Fields 343938c2f4b1SJ. Bruce Fields } 344038c2f4b1SJ. Bruce Fields 34411da177e4SLinus Torvalds /* 34421da177e4SLinus Torvalds * Checks for stateid operations 34431da177e4SLinus Torvalds */ 3444b37ad28bSAl Viro __be32 34455ccb0066SStanislav Kinsbursky nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, 3446dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 34471da177e4SLinus Torvalds { 344869064a27SJ. Bruce Fields struct nfs4_stid *s; 3449dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34501da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3451dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34521da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3453b37ad28bSAl Viro __be32 status; 34541da177e4SLinus Torvalds 34551da177e4SLinus Torvalds if (filpp) 34561da177e4SLinus Torvalds *filpp = NULL; 34571da177e4SLinus Torvalds 34585ccb0066SStanislav Kinsbursky if (grace_disallows_io(net, ino)) 34591da177e4SLinus Torvalds return nfserr_grace; 34601da177e4SLinus Torvalds 34611da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34625ccb0066SStanislav Kinsbursky return check_special_stateids(net, current_fh, stateid, flags); 34631da177e4SLinus Torvalds 3464d15c077eSJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s, cstate->minorversion); 346538c2f4b1SJ. Bruce Fields if (status) 346638c2f4b1SJ. Bruce Fields return status; 346769064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34680c2a498fSJ. Bruce Fields if (status) 34690c2a498fSJ. Bruce Fields goto out; 3470f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3471f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 347269064a27SJ. Bruce Fields dp = delegstateid(s); 3473dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3474dc9bf700SJ. Bruce Fields if (status) 3475dc9bf700SJ. Bruce Fields goto out; 347643b0178eSDan Carpenter if (filpp) { 3477acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3478f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 347943b0178eSDan Carpenter } 3480f7a4d872SJ. Bruce Fields break; 3481f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3482f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 348369064a27SJ. Bruce Fields stp = openlockstateid(s); 3484f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3485f7a4d872SJ. Bruce Fields if (status) 34861da177e4SLinus Torvalds goto out; 3487fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3488dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34891da177e4SLinus Torvalds goto out; 3490a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3491a4455be0SJ. Bruce Fields if (status) 34921da177e4SLinus Torvalds goto out; 3493f9d7562fSJ. Bruce Fields if (filpp) { 3494f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3495f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3496f9d7562fSJ. Bruce Fields else 3497f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3498f9d7562fSJ. Bruce Fields } 3499f7a4d872SJ. Bruce Fields break; 3500f7a4d872SJ. Bruce Fields default: 3501f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 35021da177e4SLinus Torvalds } 35031da177e4SLinus Torvalds status = nfs_ok; 35041da177e4SLinus Torvalds out: 35051da177e4SLinus Torvalds return status; 35061da177e4SLinus Torvalds } 35071da177e4SLinus Torvalds 3508e1ca12dfSBryan Schumaker static __be32 3509dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3510e1ca12dfSBryan Schumaker { 3511fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3512e1ca12dfSBryan Schumaker return nfserr_locks_held; 3513e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3514e1ca12dfSBryan Schumaker return nfs_ok; 3515e1ca12dfSBryan Schumaker } 3516e1ca12dfSBryan Schumaker 3517e1ca12dfSBryan Schumaker /* 351817456804SBryan Schumaker * Test if the stateid is valid 351917456804SBryan Schumaker */ 352017456804SBryan Schumaker __be32 352117456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 352217456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 352317456804SBryan Schumaker { 352403cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 352503cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 352603cfb420SBryan Schumaker 352703cfb420SBryan Schumaker nfs4_lock_state(); 352803cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 35297df302f7SChuck Lever stateid->ts_id_status = 35307df302f7SChuck Lever nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); 353103cfb420SBryan Schumaker nfs4_unlock_state(); 353203cfb420SBryan Schumaker 353317456804SBryan Schumaker return nfs_ok; 353417456804SBryan Schumaker } 353517456804SBryan Schumaker 3536e1ca12dfSBryan Schumaker __be32 3537e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3538e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3539e1ca12dfSBryan Schumaker { 3540e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 35412da1cec7SJ. Bruce Fields struct nfs4_stid *s; 354238c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 35432da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3544e1ca12dfSBryan Schumaker 3545e1ca12dfSBryan Schumaker nfs4_lock_state(); 354638c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 35472da1cec7SJ. Bruce Fields if (!s) 3548e1ca12dfSBryan Schumaker goto out; 35492da1cec7SJ. Bruce Fields switch (s->sc_type) { 35502da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3551e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3552e1ca12dfSBryan Schumaker goto out; 35532da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35542da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35552da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35562da1cec7SJ. Bruce Fields if (ret) 3557e1ca12dfSBryan Schumaker goto out; 35582da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35592da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35602da1cec7SJ. Bruce Fields else 35612da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3562f7a4d872SJ. Bruce Fields break; 3563f7a4d872SJ. Bruce Fields default: 3564f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3565e1ca12dfSBryan Schumaker } 3566e1ca12dfSBryan Schumaker out: 3567e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3568e1ca12dfSBryan Schumaker return ret; 3569e1ca12dfSBryan Schumaker } 3570e1ca12dfSBryan Schumaker 35714c4cd222SNeilBrown static inline int 35724c4cd222SNeilBrown setlkflg (int type) 35734c4cd222SNeilBrown { 35744c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35754c4cd222SNeilBrown RD_STATE : WR_STATE; 35764c4cd222SNeilBrown } 35771da177e4SLinus Torvalds 3578dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3579c0a5d93eSJ. Bruce Fields { 3580c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3581c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3582c0a5d93eSJ. Bruce Fields __be32 status; 3583c0a5d93eSJ. Bruce Fields 3584c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3585c0a5d93eSJ. Bruce Fields if (status) 3586c0a5d93eSJ. Bruce Fields return status; 3587f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3588f7a4d872SJ. Bruce Fields /* 3589f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3590f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3591f7a4d872SJ. Bruce Fields */ 3592f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3593f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3594f7a4d872SJ. Bruce Fields if (status) 3595f7a4d872SJ. Bruce Fields return status; 3596f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3597c0a5d93eSJ. Bruce Fields } 3598c0a5d93eSJ. Bruce Fields 35991da177e4SLinus Torvalds /* 36001da177e4SLinus Torvalds * Checks for sequence id mutating operations. 36011da177e4SLinus Torvalds */ 3602b37ad28bSAl Viro static __be32 3603dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 36042288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3605dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 36061da177e4SLinus Torvalds { 36070836f587SJ. Bruce Fields __be32 status; 360838c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 36091da177e4SLinus Torvalds 36108c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 36118c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 36121da177e4SLinus Torvalds 36131da177e4SLinus Torvalds *stpp = NULL; 3614d15c077eSJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s, cstate->minorversion); 3615c0a5d93eSJ. Bruce Fields if (status) 3616c0a5d93eSJ. Bruce Fields return status; 361738c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3618c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 36191da177e4SLinus Torvalds 3620c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 36211da177e4SLinus Torvalds } 36221da177e4SLinus Torvalds 3623dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3624c0a5d93eSJ. Bruce Fields { 3625c0a5d93eSJ. Bruce Fields __be32 status; 3626c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 36271da177e4SLinus Torvalds 3628c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 36292288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 36300836f587SJ. Bruce Fields if (status) 36310836f587SJ. Bruce Fields return status; 3632c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3633dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3634c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 36353a4f98bbSNeilBrown return nfs_ok; 36361da177e4SLinus Torvalds } 36371da177e4SLinus Torvalds 3638b37ad28bSAl Viro __be32 3639ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3640a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 36411da177e4SLinus Torvalds { 3642b37ad28bSAl Viro __be32 status; 3643fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3644dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36451da177e4SLinus Torvalds 36461da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3647ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3648ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36491da177e4SLinus Torvalds 3650ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3651a8cddc5dSJ. Bruce Fields if (status) 3652a8cddc5dSJ. Bruce Fields return status; 36531da177e4SLinus Torvalds 36541da177e4SLinus Torvalds nfs4_lock_state(); 36551da177e4SLinus Torvalds 36569072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3657ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36582288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36599072d5c6SJ. Bruce Fields if (status) 36601da177e4SLinus Torvalds goto out; 3661fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 366268b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3663dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 366468b66e82SJ. Bruce Fields goto out; 3665dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3666dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3667dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36688c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3669dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3670c7b9a459SNeilBrown 36712a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 367268b66e82SJ. Bruce Fields status = nfs_ok; 36731da177e4SLinus Torvalds out: 36745ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36751da177e4SLinus Torvalds nfs4_unlock_state(); 36761da177e4SLinus Torvalds return status; 36771da177e4SLinus Torvalds } 36781da177e4SLinus Torvalds 36796409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36801da177e4SLinus Torvalds { 368182c5ff1bSJeff Layton if (!test_access(access, stp)) 36826409a5a6SJ. Bruce Fields return; 36836409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 368482c5ff1bSJeff Layton clear_access(access, stp); 3685f197c271SJ. Bruce Fields } 36866409a5a6SJ. Bruce Fields 36876409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36886409a5a6SJ. Bruce Fields { 36896409a5a6SJ. Bruce Fields switch (to_access) { 36906409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36916409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36926409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36936409a5a6SJ. Bruce Fields break; 36946409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36956409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36966409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36976409a5a6SJ. Bruce Fields break; 36986409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36996409a5a6SJ. Bruce Fields break; 37006409a5a6SJ. Bruce Fields default: 37016409a5a6SJ. Bruce Fields BUG(); 37021da177e4SLinus Torvalds } 37031da177e4SLinus Torvalds } 37041da177e4SLinus Torvalds 37051da177e4SLinus Torvalds static void 3706ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 37071da177e4SLinus Torvalds { 37081da177e4SLinus Torvalds int i; 37091da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 37101da177e4SLinus Torvalds if ((i & deny) != i) 3711ce0fc43cSJeff Layton clear_deny(i, stp); 37121da177e4SLinus Torvalds } 37131da177e4SLinus Torvalds } 37141da177e4SLinus Torvalds 3715b37ad28bSAl Viro __be32 3716ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3717ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3718a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 37191da177e4SLinus Torvalds { 3720b37ad28bSAl Viro __be32 status; 3721dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37221da177e4SLinus Torvalds 37231da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3724ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3725ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37261da177e4SLinus Torvalds 3727c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 37282c8bd7e0SBenny Halevy if (od->od_deleg_want) 37292c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 37302c8bd7e0SBenny Halevy od->od_deleg_want); 37311da177e4SLinus Torvalds 37321da177e4SLinus Torvalds nfs4_lock_state(); 3733c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3734c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 37359072d5c6SJ. Bruce Fields if (status) 37361da177e4SLinus Torvalds goto out; 37371da177e4SLinus Torvalds status = nfserr_inval; 373882c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 37391da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 37401da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 37411da177e4SLinus Torvalds goto out; 37421da177e4SLinus Torvalds } 3743ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 37441da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 37451da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 37461da177e4SLinus Torvalds goto out; 37471da177e4SLinus Torvalds } 37486409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37491da177e4SLinus Torvalds 3750ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 37511da177e4SLinus Torvalds 3752dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3753dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37541da177e4SLinus Torvalds status = nfs_ok; 37551da177e4SLinus Torvalds out: 37565ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37571da177e4SLinus Torvalds nfs4_unlock_state(); 37581da177e4SLinus Torvalds return status; 37591da177e4SLinus Torvalds } 37601da177e4SLinus Torvalds 376138c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 376238c387b5SJ. Bruce Fields { 376338c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 376438c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 376538c387b5SJ. Bruce Fields 376638c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 376738c387b5SJ. Bruce Fields return; 376838c387b5SJ. Bruce Fields oo = openowner(so); 376938c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 377038c387b5SJ. Bruce Fields if (!s) 377138c387b5SJ. Bruce Fields return; 377238c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 377338c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 377438c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 377538c387b5SJ. Bruce Fields return; 377638c387b5SJ. Bruce Fields } 377738c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3778f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3779f7a4d872SJ. Bruce Fields } 3780f7a4d872SJ. Bruce Fields 3781f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3782f7a4d872SJ. Bruce Fields { 3783f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3784f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 378538c387b5SJ. Bruce Fields } 378638c387b5SJ. Bruce Fields 37871da177e4SLinus Torvalds /* 37881da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37891da177e4SLinus Torvalds */ 3790b37ad28bSAl Viro __be32 3791ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3792a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37931da177e4SLinus Torvalds { 3794b37ad28bSAl Viro __be32 status; 3795fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3796dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37971da177e4SLinus Torvalds 37981da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3799ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3800ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 38011da177e4SLinus Torvalds 38021da177e4SLinus Torvalds nfs4_lock_state(); 3803f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3804f7a4d872SJ. Bruce Fields &close->cl_stateid, 3805f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3806f7a4d872SJ. Bruce Fields &stp); 38079072d5c6SJ. Bruce Fields if (status) 38081da177e4SLinus Torvalds goto out; 3809fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 38101da177e4SLinus Torvalds status = nfs_ok; 3811dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3812dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 38131da177e4SLinus Torvalds 3814f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 3815cf9182e9SJ. Bruce Fields release_last_closed_stateid(oo); 381638c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 381704ef5954SJ. Bruce Fields 381874dbafafSJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) { 381974dbafafSJ. Bruce Fields if (cstate->minorversion) { 382074dbafafSJ. Bruce Fields release_openowner(oo); 382174dbafafSJ. Bruce Fields cstate->replay_owner = NULL; 382274dbafafSJ. Bruce Fields } else { 382374dbafafSJ. Bruce Fields /* 382474dbafafSJ. Bruce Fields * In the 4.0 case we need to keep the owners around a 382574dbafafSJ. Bruce Fields * little while to handle CLOSE replay. 382604ef5954SJ. Bruce Fields */ 3827fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3828fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 382974dbafafSJ. Bruce Fields } 383074dbafafSJ. Bruce Fields } 38311da177e4SLinus Torvalds out: 38325ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 38331da177e4SLinus Torvalds nfs4_unlock_state(); 38341da177e4SLinus Torvalds return status; 38351da177e4SLinus Torvalds } 38361da177e4SLinus Torvalds 3837b37ad28bSAl Viro __be32 3838ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3839ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 38401da177e4SLinus Torvalds { 3841203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3842203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 384338c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3844b37ad28bSAl Viro __be32 status; 38451da177e4SLinus Torvalds 3846ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3847203a8c8eSJ. Bruce Fields return status; 38481da177e4SLinus Torvalds 38491da177e4SLinus Torvalds nfs4_lock_state(); 3850d15c077eSJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion); 385138c2f4b1SJ. Bruce Fields if (status) 3852203a8c8eSJ. Bruce Fields goto out; 385338c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3854d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3855203a8c8eSJ. Bruce Fields if (status) 3856203a8c8eSJ. Bruce Fields goto out; 3857203a8c8eSJ. Bruce Fields 3858203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38591da177e4SLinus Torvalds out: 3860203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3861203a8c8eSJ. Bruce Fields 38621da177e4SLinus Torvalds return status; 38631da177e4SLinus Torvalds } 38641da177e4SLinus Torvalds 38651da177e4SLinus Torvalds 38661da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38671da177e4SLinus Torvalds 3868009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3869009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3870009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38711da177e4SLinus Torvalds 387287df4de8SBenny Halevy static inline u64 387387df4de8SBenny Halevy end_offset(u64 start, u64 len) 387487df4de8SBenny Halevy { 387587df4de8SBenny Halevy u64 end; 387687df4de8SBenny Halevy 387787df4de8SBenny Halevy end = start + len; 387887df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 387987df4de8SBenny Halevy } 388087df4de8SBenny Halevy 388187df4de8SBenny Halevy /* last octet in a range */ 388287df4de8SBenny Halevy static inline u64 388387df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 388487df4de8SBenny Halevy { 388587df4de8SBenny Halevy u64 end; 388687df4de8SBenny Halevy 388787df4de8SBenny Halevy BUG_ON(!len); 388887df4de8SBenny Halevy end = start + len; 388987df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 389087df4de8SBenny Halevy } 389187df4de8SBenny Halevy 3892009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38931da177e4SLinus Torvalds { 38941da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38951da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3896009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38971da177e4SLinus Torvalds } 38981da177e4SLinus Torvalds 3899009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 39001da177e4SLinus Torvalds 39011da177e4SLinus Torvalds /* 39021da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 39031da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 39041da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 39051da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 39061da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 39071da177e4SLinus Torvalds * the VFS, but this is a very deep change! 39081da177e4SLinus Torvalds */ 39091da177e4SLinus Torvalds static inline void 39101da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 39111da177e4SLinus Torvalds { 39121da177e4SLinus Torvalds if (lock->fl_start < 0) 39131da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 39141da177e4SLinus Torvalds if (lock->fl_end < 0) 39151da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 39161da177e4SLinus Torvalds } 39171da177e4SLinus Torvalds 3918d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3919d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 39207b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3921d5b9026aSNeilBrown }; 39221da177e4SLinus Torvalds 39231da177e4SLinus Torvalds static inline void 39241da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 39251da177e4SLinus Torvalds { 3926fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39271da177e4SLinus Torvalds 3928d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3929fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3930fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3931fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 39327c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 39337c13f344SJ. Bruce Fields /* We just don't care that much */ 39347c13f344SJ. Bruce Fields goto nevermind; 3935fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3936fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3937d5b9026aSNeilBrown } else { 39387c13f344SJ. Bruce Fields nevermind: 39397c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 39407c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3941d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3942d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 39431da177e4SLinus Torvalds } 39441da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 394587df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 394687df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 39471da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39481da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39491da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39501da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39511da177e4SLinus Torvalds } 39521da177e4SLinus Torvalds 3953b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3954b93d87c1SJ. Bruce Fields { 3955b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3956b93d87c1SJ. Bruce Fields 3957b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3958b93d87c1SJ. Bruce Fields return false; 3959b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3960b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3961b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3962b93d87c1SJ. Bruce Fields } 3963b93d87c1SJ. Bruce Fields 3964fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3965fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 39661da177e4SLinus Torvalds struct xdr_netobj *owner) 39671da177e4SLinus Torvalds { 3968009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3969b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39701da177e4SLinus Torvalds 3971009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3972b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3973b93d87c1SJ. Bruce Fields return lo; 39741da177e4SLinus Torvalds } 39751da177e4SLinus Torvalds return NULL; 39761da177e4SLinus Torvalds } 39771da177e4SLinus Torvalds 3978dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3979ff194bd9SJ. Bruce Fields { 3980009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3981009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3982009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3983009673b4SJ. Bruce Fields 398416bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3985009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3986fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3987ff194bd9SJ. Bruce Fields } 3988ff194bd9SJ. Bruce Fields 39891da177e4SLinus Torvalds /* 39901da177e4SLinus Torvalds * Alloc a lock owner structure. 39911da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 399225985edcSLucas De Marchi * occurred. 39931da177e4SLinus Torvalds * 399416bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39951da177e4SLinus Torvalds */ 39961da177e4SLinus Torvalds 3997fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3998dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3999fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 40001da177e4SLinus Torvalds 4001fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 4002fe0750e5SJ. Bruce Fields if (!lo) 40031da177e4SLinus Torvalds return NULL; 4004fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 4005fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 4006b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 4007b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 4008fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 4009fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 4010fe0750e5SJ. Bruce Fields return lo; 40111da177e4SLinus Torvalds } 40121da177e4SLinus Torvalds 4013dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 4014dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 40151da177e4SLinus Torvalds { 4016dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 4017d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 40181da177e4SLinus Torvalds 4019996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 40205ac049acSNeilBrown if (stp == NULL) 40216136d2b4SJ. Bruce Fields return NULL; 4022996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 40238beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 4024fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 4025fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 402613cd2184SNeilBrown get_nfs4_file(fp); 40271da177e4SLinus Torvalds stp->st_file = fp; 40280997b173SJ. Bruce Fields stp->st_access_bmap = 0; 40291da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 40304c4cd222SNeilBrown stp->st_openstp = open_stp; 40311da177e4SLinus Torvalds return stp; 40321da177e4SLinus Torvalds } 40331da177e4SLinus Torvalds 4034fd39ca9aSNeilBrown static int 40351da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 40361da177e4SLinus Torvalds { 403787df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 40381da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 40391da177e4SLinus Torvalds } 40401da177e4SLinus Torvalds 4041dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 40420997b173SJ. Bruce Fields { 40430997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 40440997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 40450997b173SJ. Bruce Fields 404682c5ff1bSJeff Layton if (test_access(access, lock_stp)) 40470997b173SJ. Bruce Fields return; 40480997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 404982c5ff1bSJeff Layton set_access(access, lock_stp); 40500997b173SJ. Bruce Fields } 40510997b173SJ. Bruce Fields 40522355c596SJ. 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) 405364a284d0SJ. Bruce Fields { 405464a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 405564a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 405664a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 405764a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 405864a284d0SJ. Bruce Fields unsigned int strhashval; 405964a284d0SJ. Bruce Fields 406064a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 406164a284d0SJ. Bruce Fields if (lo) { 406264a284d0SJ. Bruce Fields if (!cstate->minorversion) 406364a284d0SJ. Bruce Fields return nfserr_bad_seqid; 406464a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 406564a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 406664a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 406764a284d0SJ. Bruce Fields return nfs_ok; 406864a284d0SJ. Bruce Fields } 406916bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 407064a284d0SJ. Bruce Fields &lock->v.new.owner); 407164a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 407264a284d0SJ. Bruce Fields if (lo == NULL) 407364a284d0SJ. Bruce Fields return nfserr_jukebox; 407464a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 407564a284d0SJ. Bruce Fields if (*lst == NULL) { 407664a284d0SJ. Bruce Fields release_lockowner(lo); 407764a284d0SJ. Bruce Fields return nfserr_jukebox; 407864a284d0SJ. Bruce Fields } 407964a284d0SJ. Bruce Fields *new = true; 408064a284d0SJ. Bruce Fields return nfs_ok; 408164a284d0SJ. Bruce Fields } 408264a284d0SJ. Bruce Fields 40831da177e4SLinus Torvalds /* 40841da177e4SLinus Torvalds * LOCK operation 40851da177e4SLinus Torvalds */ 4086b37ad28bSAl Viro __be32 4087ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4088a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40891da177e4SLinus Torvalds { 4090fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4091fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4092dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40937d947842SJ. Bruce Fields struct file *filp = NULL; 409421179d81SJeff Layton struct file_lock *file_lock = NULL; 409521179d81SJeff Layton struct file_lock *conflock = NULL; 4096b37ad28bSAl Viro __be32 status = 0; 409764a284d0SJ. Bruce Fields bool new_state = false; 4098b34f27aaSJ. Bruce Fields int lkflg; 4099b8dd7b9aSAl Viro int err; 41007f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 41011da177e4SLinus Torvalds 41021da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 41031da177e4SLinus Torvalds (long long) lock->lk_offset, 41041da177e4SLinus Torvalds (long long) lock->lk_length); 41051da177e4SLinus Torvalds 41061da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 41071da177e4SLinus Torvalds return nfserr_inval; 41081da177e4SLinus Torvalds 4109ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 41108837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4111a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4112a6f6ef2fSAndy Adamson return status; 4113a6f6ef2fSAndy Adamson } 4114a6f6ef2fSAndy Adamson 41151da177e4SLinus Torvalds nfs4_lock_state(); 41161da177e4SLinus Torvalds 41171da177e4SLinus Torvalds if (lock->lk_is_new) { 4118dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 41191da177e4SLinus Torvalds 4120684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4121684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4122684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4123684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4124684e5638SJ. Bruce Fields sizeof(clientid_t)); 4125684e5638SJ. Bruce Fields 41261da177e4SLinus Torvalds status = nfserr_stale_clientid; 41272c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) 41281da177e4SLinus Torvalds goto out; 41291da177e4SLinus Torvalds 41301da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4131c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 41321da177e4SLinus Torvalds lock->lk_new_open_seqid, 41331da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4134c0a5d93eSJ. Bruce Fields &open_stp); 413537515177SNeilBrown if (status) 41361da177e4SLinus Torvalds goto out; 4137fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4138b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4139684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4140b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4141b34f27aaSJ. Bruce Fields goto out; 414264a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 414364a284d0SJ. Bruce Fields &lock_stp, &new_state); 4144e1aaa891SJ. Bruce Fields } else 4145dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 41461da177e4SLinus Torvalds lock->lk_old_lock_seqid, 41471da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41482288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 41491da177e4SLinus Torvalds if (status) 41501da177e4SLinus Torvalds goto out; 4151fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41521da177e4SLinus Torvalds 4153b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4154b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4155b34f27aaSJ. Bruce Fields if (status) 4156b34f27aaSJ. Bruce Fields goto out; 4157b34f27aaSJ. Bruce Fields 41580dd395dcSNeilBrown status = nfserr_grace; 41595ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) 41600dd395dcSNeilBrown goto out; 41610dd395dcSNeilBrown status = nfserr_no_grace; 41625ccb0066SStanislav Kinsbursky if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) 41630dd395dcSNeilBrown goto out; 41640dd395dcSNeilBrown 416521179d81SJeff Layton file_lock = locks_alloc_lock(); 416621179d81SJeff Layton if (!file_lock) { 416721179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 416821179d81SJeff Layton status = nfserr_jukebox; 416921179d81SJeff Layton goto out; 417021179d81SJeff Layton } 417121179d81SJeff Layton 417221179d81SJeff Layton locks_init_lock(file_lock); 41731da177e4SLinus Torvalds switch (lock->lk_type) { 41741da177e4SLinus Torvalds case NFS4_READ_LT: 41751da177e4SLinus Torvalds case NFS4_READW_LT: 4176f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41770997b173SJ. Bruce Fields if (filp) 41780997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 417921179d81SJeff Layton file_lock->fl_type = F_RDLCK; 41801da177e4SLinus Torvalds break; 41811da177e4SLinus Torvalds case NFS4_WRITE_LT: 41821da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4183f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41840997b173SJ. Bruce Fields if (filp) 41850997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 418621179d81SJeff Layton file_lock->fl_type = F_WRLCK; 41871da177e4SLinus Torvalds break; 41881da177e4SLinus Torvalds default: 41891da177e4SLinus Torvalds status = nfserr_inval; 41901da177e4SLinus Torvalds goto out; 41911da177e4SLinus Torvalds } 4192f9d7562fSJ. Bruce Fields if (!filp) { 4193f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4194f9d7562fSJ. Bruce Fields goto out; 4195f9d7562fSJ. Bruce Fields } 419621179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lock_sop; 419721179d81SJeff Layton file_lock->fl_pid = current->tgid; 419821179d81SJeff Layton file_lock->fl_file = filp; 419921179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 420021179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 420121179d81SJeff Layton file_lock->fl_start = lock->lk_offset; 420221179d81SJeff Layton file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 420321179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 42041da177e4SLinus Torvalds 420521179d81SJeff Layton conflock = locks_alloc_lock(); 420621179d81SJeff Layton if (!conflock) { 420721179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 420821179d81SJeff Layton status = nfserr_jukebox; 420921179d81SJeff Layton goto out; 421021179d81SJeff Layton } 42111da177e4SLinus Torvalds 421221179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); 4213b8dd7b9aSAl Viro switch (-err) { 42141da177e4SLinus Torvalds case 0: /* success! */ 4215dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4216dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 42171da177e4SLinus Torvalds sizeof(stateid_t)); 4218b8dd7b9aSAl Viro status = 0; 4219eb76b3fdSAndy Adamson break; 4220eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4221eb76b3fdSAndy Adamson status = nfserr_denied; 4222eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 422321179d81SJeff Layton nfs4_set_lock_denied(conflock, &lock->lk_denied); 4224eb76b3fdSAndy Adamson break; 42251da177e4SLinus Torvalds case (EDEADLK): 42261da177e4SLinus Torvalds status = nfserr_deadlock; 4227eb76b3fdSAndy Adamson break; 42281da177e4SLinus Torvalds default: 4229fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 42303e772463SJ. Bruce Fields status = nfserrno(err); 4231eb76b3fdSAndy Adamson break; 42321da177e4SLinus Torvalds } 42331da177e4SLinus Torvalds out: 423464a284d0SJ. Bruce Fields if (status && new_state) 4235f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 42365ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 42371da177e4SLinus Torvalds nfs4_unlock_state(); 423821179d81SJeff Layton if (file_lock) 423921179d81SJeff Layton locks_free_lock(file_lock); 424021179d81SJeff Layton if (conflock) 424121179d81SJeff Layton locks_free_lock(conflock); 42421da177e4SLinus Torvalds return status; 42431da177e4SLinus Torvalds } 42441da177e4SLinus Torvalds 42451da177e4SLinus Torvalds /* 424655ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 424755ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 424855ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 424955ef1274SJ. Bruce Fields * inode operation.) 425055ef1274SJ. Bruce Fields */ 425104da6e9dSAl Viro static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 425255ef1274SJ. Bruce Fields { 425355ef1274SJ. Bruce Fields struct file *file; 425404da6e9dSAl Viro __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 425504da6e9dSAl Viro if (!err) { 425604da6e9dSAl Viro err = nfserrno(vfs_test_lock(file, lock)); 425755ef1274SJ. Bruce Fields nfsd_close(file); 425804da6e9dSAl Viro } 425955ef1274SJ. Bruce Fields return err; 426055ef1274SJ. Bruce Fields } 426155ef1274SJ. Bruce Fields 426255ef1274SJ. Bruce Fields /* 42631da177e4SLinus Torvalds * LOCKT operation 42641da177e4SLinus Torvalds */ 4265b37ad28bSAl Viro __be32 4266ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4267ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42681da177e4SLinus Torvalds { 42691da177e4SLinus Torvalds struct inode *inode; 427021179d81SJeff Layton struct file_lock *file_lock = NULL; 4271fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4272b37ad28bSAl Viro __be32 status; 42737f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 42741da177e4SLinus Torvalds 42755ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp))) 42761da177e4SLinus Torvalds return nfserr_grace; 42771da177e4SLinus Torvalds 42781da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42791da177e4SLinus Torvalds return nfserr_inval; 42801da177e4SLinus Torvalds 42811da177e4SLinus Torvalds nfs4_lock_state(); 42821da177e4SLinus Torvalds 42831da177e4SLinus Torvalds status = nfserr_stale_clientid; 42842c142baaSStanislav Kinsbursky if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) 42851da177e4SLinus Torvalds goto out; 42861da177e4SLinus Torvalds 428775c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42881da177e4SLinus Torvalds goto out; 42891da177e4SLinus Torvalds 4290ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 429121179d81SJeff Layton file_lock = locks_alloc_lock(); 429221179d81SJeff Layton if (!file_lock) { 429321179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 429421179d81SJeff Layton status = nfserr_jukebox; 429521179d81SJeff Layton goto out; 429621179d81SJeff Layton } 429721179d81SJeff Layton locks_init_lock(file_lock); 42981da177e4SLinus Torvalds switch (lockt->lt_type) { 42991da177e4SLinus Torvalds case NFS4_READ_LT: 43001da177e4SLinus Torvalds case NFS4_READW_LT: 430121179d81SJeff Layton file_lock->fl_type = F_RDLCK; 43021da177e4SLinus Torvalds break; 43031da177e4SLinus Torvalds case NFS4_WRITE_LT: 43041da177e4SLinus Torvalds case NFS4_WRITEW_LT: 430521179d81SJeff Layton file_lock->fl_type = F_WRLCK; 43061da177e4SLinus Torvalds break; 43071da177e4SLinus Torvalds default: 43082fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 43091da177e4SLinus Torvalds status = nfserr_inval; 43101da177e4SLinus Torvalds goto out; 43111da177e4SLinus Torvalds } 43121da177e4SLinus Torvalds 4313fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4314fe0750e5SJ. Bruce Fields if (lo) 431521179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lo; 431621179d81SJeff Layton file_lock->fl_pid = current->tgid; 431721179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 43181da177e4SLinus Torvalds 431921179d81SJeff Layton file_lock->fl_start = lockt->lt_offset; 432021179d81SJeff Layton file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 43211da177e4SLinus Torvalds 432221179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 43231da177e4SLinus Torvalds 432421179d81SJeff Layton status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); 432504da6e9dSAl Viro if (status) 4326fd85b817SMarc Eshel goto out; 432704da6e9dSAl Viro 432821179d81SJeff Layton if (file_lock->fl_type != F_UNLCK) { 43291da177e4SLinus Torvalds status = nfserr_denied; 433021179d81SJeff Layton nfs4_set_lock_denied(file_lock, &lockt->lt_denied); 43311da177e4SLinus Torvalds } 43321da177e4SLinus Torvalds out: 43331da177e4SLinus Torvalds nfs4_unlock_state(); 433421179d81SJeff Layton if (file_lock) 433521179d81SJeff Layton locks_free_lock(file_lock); 43361da177e4SLinus Torvalds return status; 43371da177e4SLinus Torvalds } 43381da177e4SLinus Torvalds 4339b37ad28bSAl Viro __be32 4340ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4341a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 43421da177e4SLinus Torvalds { 4343dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43441da177e4SLinus Torvalds struct file *filp = NULL; 434521179d81SJeff Layton struct file_lock *file_lock = NULL; 4346b37ad28bSAl Viro __be32 status; 4347b8dd7b9aSAl Viro int err; 43481da177e4SLinus Torvalds 43491da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 43501da177e4SLinus Torvalds (long long) locku->lu_offset, 43511da177e4SLinus Torvalds (long long) locku->lu_length); 43521da177e4SLinus Torvalds 43531da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 43541da177e4SLinus Torvalds return nfserr_inval; 43551da177e4SLinus Torvalds 43561da177e4SLinus Torvalds nfs4_lock_state(); 43571da177e4SLinus Torvalds 43589072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 43592288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 43609072d5c6SJ. Bruce Fields if (status) 43611da177e4SLinus Torvalds goto out; 4362f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4363f9d7562fSJ. Bruce Fields if (!filp) { 4364f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4365f9d7562fSJ. Bruce Fields goto out; 4366f9d7562fSJ. Bruce Fields } 436721179d81SJeff Layton file_lock = locks_alloc_lock(); 436821179d81SJeff Layton if (!file_lock) { 436921179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 437021179d81SJeff Layton status = nfserr_jukebox; 437121179d81SJeff Layton goto out; 437221179d81SJeff Layton } 437321179d81SJeff Layton locks_init_lock(file_lock); 437421179d81SJeff Layton file_lock->fl_type = F_UNLCK; 437521179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 437621179d81SJeff Layton file_lock->fl_pid = current->tgid; 437721179d81SJeff Layton file_lock->fl_file = filp; 437821179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 437921179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 438021179d81SJeff Layton file_lock->fl_start = locku->lu_offset; 43811da177e4SLinus Torvalds 438221179d81SJeff Layton file_lock->fl_end = last_byte_offset(locku->lu_offset, 438321179d81SJeff Layton locku->lu_length); 438421179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 43851da177e4SLinus Torvalds 43861da177e4SLinus Torvalds /* 43871da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43881da177e4SLinus Torvalds */ 438921179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); 4390b8dd7b9aSAl Viro if (err) { 4391fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43921da177e4SLinus Torvalds goto out_nfserr; 43931da177e4SLinus Torvalds } 43941da177e4SLinus Torvalds /* 43951da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43961da177e4SLinus Torvalds */ 4397dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4398dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43991da177e4SLinus Torvalds 44001da177e4SLinus Torvalds out: 440171c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 44021da177e4SLinus Torvalds nfs4_unlock_state(); 440321179d81SJeff Layton if (file_lock) 440421179d81SJeff Layton locks_free_lock(file_lock); 44051da177e4SLinus Torvalds return status; 44061da177e4SLinus Torvalds 44071da177e4SLinus Torvalds out_nfserr: 4408b8dd7b9aSAl Viro status = nfserrno(err); 44091da177e4SLinus Torvalds goto out; 44101da177e4SLinus Torvalds } 44111da177e4SLinus Torvalds 44121da177e4SLinus Torvalds /* 44131da177e4SLinus Torvalds * returns 44141da177e4SLinus Torvalds * 1: locks held by lockowner 44151da177e4SLinus Torvalds * 0: no locks held by lockowner 44161da177e4SLinus Torvalds */ 44171da177e4SLinus Torvalds static int 4418fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 44191da177e4SLinus Torvalds { 44201da177e4SLinus Torvalds struct file_lock **flpp; 4421f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 44221da177e4SLinus Torvalds int status = 0; 44231da177e4SLinus Torvalds 4424b89f4321SArnd Bergmann lock_flocks(); 44251da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4426796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 44271da177e4SLinus Torvalds status = 1; 44281da177e4SLinus Torvalds goto out; 44291da177e4SLinus Torvalds } 4430796dadfdSJ. Bruce Fields } 44311da177e4SLinus Torvalds out: 4432b89f4321SArnd Bergmann unlock_flocks(); 44331da177e4SLinus Torvalds return status; 44341da177e4SLinus Torvalds } 44351da177e4SLinus Torvalds 4436b37ad28bSAl Viro __be32 4437b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4438b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4439b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 44401da177e4SLinus Torvalds { 44411da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 44423e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4443fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4444dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 44451da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 44463e9e3dbeSNeilBrown struct list_head matches; 444716bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4448b37ad28bSAl Viro __be32 status; 44497f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 44501da177e4SLinus Torvalds 44511da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 44521da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 44531da177e4SLinus Torvalds 44541da177e4SLinus Torvalds /* XXX check for lease expiration */ 44551da177e4SLinus Torvalds 44561da177e4SLinus Torvalds status = nfserr_stale_clientid; 44572c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 44581da177e4SLinus Torvalds return status; 44591da177e4SLinus Torvalds 44601da177e4SLinus Torvalds nfs4_lock_state(); 44611da177e4SLinus Torvalds 44621da177e4SLinus Torvalds status = nfserr_locks_held; 44633e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 446406f1f864SJ. Bruce Fields 446516bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 446616bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 446716bfdaafSJ. Bruce Fields continue; 4468599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 44693e9e3dbeSNeilBrown continue; 44703e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4471ea1da636SNeilBrown st_perstateowner) { 4472fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4473fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 44741da177e4SLinus Torvalds goto out; 4475fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 44761da177e4SLinus Torvalds } 44773e9e3dbeSNeilBrown } 44783e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44793e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44803e9e3dbeSNeilBrown * have been checked. */ 44811da177e4SLinus Torvalds status = nfs_ok; 44820fa822e4SNeilBrown while (!list_empty(&matches)) { 4483fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4484fe0750e5SJ. Bruce Fields lo_list); 44850fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 44860fa822e4SNeilBrown * for openowners. */ 4487fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4488fe0750e5SJ. Bruce Fields release_lockowner(lo); 44891da177e4SLinus Torvalds } 44901da177e4SLinus Torvalds out: 44911da177e4SLinus Torvalds nfs4_unlock_state(); 44921da177e4SLinus Torvalds return status; 44931da177e4SLinus Torvalds } 44941da177e4SLinus Torvalds 44951da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4496a55370a3SNeilBrown alloc_reclaim(void) 44971da177e4SLinus Torvalds { 4498a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44991da177e4SLinus Torvalds } 45001da177e4SLinus Torvalds 45010ce0c2b5SJeff Layton bool 450252e19c09SStanislav Kinsbursky nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) 4503c7b9a459SNeilBrown { 45040ce0c2b5SJeff Layton struct nfs4_client_reclaim *crp; 4505c7b9a459SNeilBrown 450652e19c09SStanislav Kinsbursky crp = nfsd4_find_reclaim_client(name, nn); 45070ce0c2b5SJeff Layton return (crp && crp->cr_clp); 4508c7b9a459SNeilBrown } 4509c7b9a459SNeilBrown 45101da177e4SLinus Torvalds /* 45111da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 45121da177e4SLinus Torvalds */ 4513772a9bbbSJeff Layton struct nfs4_client_reclaim * 451452e19c09SStanislav Kinsbursky nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) 45151da177e4SLinus Torvalds { 45161da177e4SLinus Torvalds unsigned int strhashval; 4517772a9bbbSJeff Layton struct nfs4_client_reclaim *crp; 45181da177e4SLinus Torvalds 4519a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4520a55370a3SNeilBrown crp = alloc_reclaim(); 4521772a9bbbSJeff Layton if (crp) { 4522a55370a3SNeilBrown strhashval = clientstr_hashval(name); 45231da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 452452e19c09SStanislav Kinsbursky list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); 4525a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 45260ce0c2b5SJeff Layton crp->cr_clp = NULL; 452752e19c09SStanislav Kinsbursky nn->reclaim_str_hashtbl_size++; 4528772a9bbbSJeff Layton } 4529772a9bbbSJeff Layton return crp; 45301da177e4SLinus Torvalds } 45311da177e4SLinus Torvalds 45322a4317c5SJeff Layton void 453352e19c09SStanislav Kinsbursky nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) 4534ce30e539SJeff Layton { 4535ce30e539SJeff Layton list_del(&crp->cr_strhash); 4536ce30e539SJeff Layton kfree(crp); 453752e19c09SStanislav Kinsbursky nn->reclaim_str_hashtbl_size--; 4538ce30e539SJeff Layton } 4539ce30e539SJeff Layton 4540ce30e539SJeff Layton void 454152e19c09SStanislav Kinsbursky nfs4_release_reclaim(struct nfsd_net *nn) 45421da177e4SLinus Torvalds { 45431da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45441da177e4SLinus Torvalds int i; 45451da177e4SLinus Torvalds 45461da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 454752e19c09SStanislav Kinsbursky while (!list_empty(&nn->reclaim_str_hashtbl[i])) { 454852e19c09SStanislav Kinsbursky crp = list_entry(nn->reclaim_str_hashtbl[i].next, 45491da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 455052e19c09SStanislav Kinsbursky nfs4_remove_reclaim_record(crp, nn); 45511da177e4SLinus Torvalds } 45521da177e4SLinus Torvalds } 455352e19c09SStanislav Kinsbursky BUG_ON(nn->reclaim_str_hashtbl_size); 45541da177e4SLinus Torvalds } 45551da177e4SLinus Torvalds 45561da177e4SLinus Torvalds /* 45571da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 45582a4317c5SJeff Layton struct nfs4_client_reclaim * 455952e19c09SStanislav Kinsbursky nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) 45601da177e4SLinus Torvalds { 45611da177e4SLinus Torvalds unsigned int strhashval; 45621da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45631da177e4SLinus Torvalds 4564278c931cSJeff Layton dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); 45651da177e4SLinus Torvalds 4566278c931cSJeff Layton strhashval = clientstr_hashval(recdir); 456752e19c09SStanislav Kinsbursky list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { 4568278c931cSJeff Layton if (same_name(crp->cr_recdir, recdir)) { 45691da177e4SLinus Torvalds return crp; 45701da177e4SLinus Torvalds } 45711da177e4SLinus Torvalds } 45721da177e4SLinus Torvalds return NULL; 45731da177e4SLinus Torvalds } 45741da177e4SLinus Torvalds 45751da177e4SLinus Torvalds /* 45761da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 45771da177e4SLinus Torvalds */ 4578b37ad28bSAl Viro __be32 4579d15c077eSJ. Bruce Fields nfs4_check_open_reclaim(clientid_t *clid, bool sessions) 45801da177e4SLinus Torvalds { 4581a52d726bSJeff Layton struct nfs4_client *clp; 45828daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 4583a52d726bSJeff Layton 4584a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 45858daae4dcSStanislav Kinsbursky clp = find_confirmed_client(clid, sessions, nn); 4586a52d726bSJeff Layton if (clp == NULL) 4587a52d726bSJeff Layton return nfserr_reclaim_bad; 4588a52d726bSJeff Layton 4589a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45901da177e4SLinus Torvalds } 45911da177e4SLinus Torvalds 459265178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 459365178db4SBryan Schumaker 459465178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 459565178db4SBryan Schumaker { 459665178db4SBryan Schumaker struct nfs4_client *clp, *next; 459765178db4SBryan Schumaker int count = 0; 459865178db4SBryan Schumaker 459965178db4SBryan Schumaker nfs4_lock_state(); 460065178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 460165178db4SBryan Schumaker expire_client(clp); 460265178db4SBryan Schumaker if (++count == num) 460365178db4SBryan Schumaker break; 460465178db4SBryan Schumaker } 460565178db4SBryan Schumaker nfs4_unlock_state(); 460665178db4SBryan Schumaker 460765178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 460865178db4SBryan Schumaker } 460965178db4SBryan Schumaker 461065178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 461165178db4SBryan Schumaker { 461265178db4SBryan Schumaker release_lockowner(lockowner(sop)); 461365178db4SBryan Schumaker } 461465178db4SBryan Schumaker 461565178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 461665178db4SBryan Schumaker { 461765178db4SBryan Schumaker release_openowner(openowner(sop)); 461865178db4SBryan Schumaker } 461965178db4SBryan Schumaker 4620353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 462165178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 462265178db4SBryan Schumaker { 462365178db4SBryan Schumaker int i, count = 0; 462465178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 462565178db4SBryan Schumaker 462616bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 462716bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 462816bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 462916bfdaafSJ. Bruce Fields continue; 463065178db4SBryan Schumaker release_sop(sop); 463165178db4SBryan Schumaker if (++count == num) 463265178db4SBryan Schumaker return count; 463365178db4SBryan Schumaker } 463465178db4SBryan Schumaker } 463565178db4SBryan Schumaker return count; 463665178db4SBryan Schumaker } 463765178db4SBryan Schumaker 463865178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 463965178db4SBryan Schumaker { 464065178db4SBryan Schumaker int count; 464165178db4SBryan Schumaker 464265178db4SBryan Schumaker nfs4_lock_state(); 464316bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 464465178db4SBryan Schumaker nfs4_unlock_state(); 464565178db4SBryan Schumaker 464665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 464765178db4SBryan Schumaker } 464865178db4SBryan Schumaker 464965178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 465065178db4SBryan Schumaker { 465165178db4SBryan Schumaker int count; 465265178db4SBryan Schumaker 465365178db4SBryan Schumaker nfs4_lock_state(); 465416bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 465565178db4SBryan Schumaker nfs4_unlock_state(); 465665178db4SBryan Schumaker 465765178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 465865178db4SBryan Schumaker } 465965178db4SBryan Schumaker 4660da5c80a9SJ. Bruce Fields static int nfsd_process_n_delegations(u64 num, struct list_head *list) 466165178db4SBryan Schumaker { 466265178db4SBryan Schumaker int i, count = 0; 46632d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 46642d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 466565178db4SBryan Schumaker 466665178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 46672d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 46682d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 4669a6d88f29SStanislav Kinsbursky list_move(&dp->dl_recall_lru, list); 467065178db4SBryan Schumaker if (++count == num) 467165178db4SBryan Schumaker return count; 467265178db4SBryan Schumaker } 467365178db4SBryan Schumaker } 467465178db4SBryan Schumaker } 46752d3475c0SBryan Schumaker 467665178db4SBryan Schumaker return count; 467765178db4SBryan Schumaker } 467865178db4SBryan Schumaker 467965178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 468065178db4SBryan Schumaker { 468165178db4SBryan Schumaker unsigned int count; 4682a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4683a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 4684a6d88f29SStanislav Kinsbursky 4685a6d88f29SStanislav Kinsbursky spin_lock(&recall_lock); 4686a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4687a6d88f29SStanislav Kinsbursky spin_unlock(&recall_lock); 468865178db4SBryan Schumaker 468965178db4SBryan Schumaker nfs4_lock_state(); 4690a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) 4691a6d88f29SStanislav Kinsbursky unhash_delegation(dp); 469265178db4SBryan Schumaker nfs4_unlock_state(); 469365178db4SBryan Schumaker 469465178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 469565178db4SBryan Schumaker } 469665178db4SBryan Schumaker 469765178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 469865178db4SBryan Schumaker { 469965178db4SBryan Schumaker unsigned int count; 4700a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4701a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 470265178db4SBryan Schumaker 470365178db4SBryan Schumaker spin_lock(&recall_lock); 4704a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4705a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { 4706a6d88f29SStanislav Kinsbursky list_del(&dp->dl_recall_lru); 4707a6d88f29SStanislav Kinsbursky nfsd_break_one_deleg(dp); 4708a6d88f29SStanislav Kinsbursky } 470965178db4SBryan Schumaker spin_unlock(&recall_lock); 471065178db4SBryan Schumaker 471165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 471265178db4SBryan Schumaker } 471365178db4SBryan Schumaker 471465178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 471565178db4SBryan Schumaker 4716ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 47171da177e4SLinus Torvalds 471872083396SBryan Schumaker void 4719ac4d8ff2SNeilBrown nfs4_state_init(void) 47201da177e4SLinus Torvalds { 472172083396SBryan Schumaker int i; 47221da177e4SLinus Torvalds 47231da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47241da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 47251da177e4SLinus Torvalds } 4726ac55fdc4SJeff Layton unconf_name_tree = RB_ROOT; 47275282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 47285282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 47291da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 47301da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 47311da177e4SLinus Torvalds } 473216bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 473316bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 47341da177e4SLinus Torvalds } 4735009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4736009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 47371da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 47381da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 47391da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4740ac4d8ff2SNeilBrown } 4741ac4d8ff2SNeilBrown 4742c2f1a551SMeelap Shah /* 4743c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4744c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4745c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4746c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4747c2f1a551SMeelap Shah * 4748c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4749c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4750c2f1a551SMeelap Shah */ 4751c2f1a551SMeelap Shah static void 4752c2f1a551SMeelap Shah set_max_delegations(void) 4753c2f1a551SMeelap Shah { 4754c2f1a551SMeelap Shah /* 4755c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4756c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4757c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4758c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4759c2f1a551SMeelap Shah */ 4760c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4761c2f1a551SMeelap Shah } 4762c2f1a551SMeelap Shah 47638daae4dcSStanislav Kinsbursky static int nfs4_state_start_net(struct net *net) 47648daae4dcSStanislav Kinsbursky { 47658daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 47668daae4dcSStanislav Kinsbursky int i; 47678daae4dcSStanislav Kinsbursky 47688daae4dcSStanislav Kinsbursky nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * 47698daae4dcSStanislav Kinsbursky CLIENT_HASH_SIZE, GFP_KERNEL); 47708daae4dcSStanislav Kinsbursky if (!nn->conf_id_hashtbl) 4771*382a62e7SStanislav Kinsbursky goto err; 47728daae4dcSStanislav Kinsbursky 4773*382a62e7SStanislav Kinsbursky for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47748daae4dcSStanislav Kinsbursky INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); 4775*382a62e7SStanislav Kinsbursky } 4776*382a62e7SStanislav Kinsbursky nn->conf_name_tree = RB_ROOT; 47778daae4dcSStanislav Kinsbursky 47788daae4dcSStanislav Kinsbursky return 0; 4779*382a62e7SStanislav Kinsbursky 4780*382a62e7SStanislav Kinsbursky err: 4781*382a62e7SStanislav Kinsbursky return -ENOMEM; 47828daae4dcSStanislav Kinsbursky } 47838daae4dcSStanislav Kinsbursky 47848daae4dcSStanislav Kinsbursky static void 47858daae4dcSStanislav Kinsbursky __nfs4_state_shutdown_net(struct net *net) 47868daae4dcSStanislav Kinsbursky { 47878daae4dcSStanislav Kinsbursky int i; 47888daae4dcSStanislav Kinsbursky struct nfs4_client *clp = NULL; 47898daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 47908daae4dcSStanislav Kinsbursky 47918daae4dcSStanislav Kinsbursky for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47928daae4dcSStanislav Kinsbursky while (!list_empty(&nn->conf_id_hashtbl[i])) { 47938daae4dcSStanislav Kinsbursky clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 47948daae4dcSStanislav Kinsbursky destroy_client(clp); 47958daae4dcSStanislav Kinsbursky } 47968daae4dcSStanislav Kinsbursky } 47978daae4dcSStanislav Kinsbursky kfree(nn->conf_id_hashtbl); 47988daae4dcSStanislav Kinsbursky } 47998daae4dcSStanislav Kinsbursky 4800ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4801ac4d8ff2SNeilBrown 4802a6d6b781SJeff Layton int 4803a6d6b781SJeff Layton nfs4_state_start(void) 4804ac4d8ff2SNeilBrown { 48055e1533c7SStanislav Kinsbursky struct net *net = &init_net; 48065e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 4807b5a1a81eSJ. Bruce Fields int ret; 4808b5a1a81eSJ. Bruce Fields 48092a4317c5SJeff Layton /* 48102a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 48112a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 48122a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 48132a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 48142a4317c5SJeff Layton * basis. 48152a4317c5SJeff Layton */ 48165e1533c7SStanislav Kinsbursky get_net(net); 48178daae4dcSStanislav Kinsbursky ret = nfs4_state_start_net(net); 48188daae4dcSStanislav Kinsbursky if (ret) 48198daae4dcSStanislav Kinsbursky return ret; 48205e1533c7SStanislav Kinsbursky nfsd4_client_tracking_init(net); 48212c142baaSStanislav Kinsbursky nn->boot_time = get_seconds(); 48225ccb0066SStanislav Kinsbursky locks_start_grace(net, &nn->nfsd4_manager); 4823a51c84edSStanislav Kinsbursky nn->grace_ended = false; 48249a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4825e46b498cSJ. Bruce Fields nfsd4_grace); 4826b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4827a6d6b781SJeff Layton if (ret) { 4828a6d6b781SJeff Layton ret = -ENOMEM; 4829a6d6b781SJeff Layton goto out_recovery; 4830a6d6b781SJeff Layton } 483158da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4832a6d6b781SJeff Layton if (laundry_wq == NULL) { 4833a6d6b781SJeff Layton ret = -ENOMEM; 4834a6d6b781SJeff Layton goto out_recovery; 4835a6d6b781SJeff Layton } 4836b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4837b5a1a81eSJ. Bruce Fields if (ret) 4838b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4839e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4840c2f1a551SMeelap Shah set_max_delegations(); 4841b5a1a81eSJ. Bruce Fields return 0; 4842b5a1a81eSJ. Bruce Fields out_free_laundry: 4843b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4844a6d6b781SJeff Layton out_recovery: 48455e1533c7SStanislav Kinsbursky nfsd4_client_tracking_exit(net); 48468daae4dcSStanislav Kinsbursky __nfs4_state_shutdown_net(net); 48475e1533c7SStanislav Kinsbursky put_net(net); 4848b5a1a81eSJ. Bruce Fields return ret; 48491da177e4SLinus Torvalds } 48501da177e4SLinus Torvalds 4851ac55fdc4SJeff Layton /* should be called with the state lock held */ 48521da177e4SLinus Torvalds static void 48538daae4dcSStanislav Kinsbursky __nfs4_state_shutdown(struct net *net) 48541da177e4SLinus Torvalds { 48551da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 48561da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 48571da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 4858ac55fdc4SJeff Layton struct rb_node *node, *tmp; 48591da177e4SLinus Torvalds 48608daae4dcSStanislav Kinsbursky __nfs4_state_shutdown_net(net); 4861ac55fdc4SJeff Layton 4862ac55fdc4SJeff Layton node = rb_first(&unconf_name_tree); 4863ac55fdc4SJeff Layton while (node != NULL) { 4864ac55fdc4SJeff Layton tmp = node; 4865ac55fdc4SJeff Layton node = rb_next(tmp); 4866ac55fdc4SJeff Layton clp = rb_entry(tmp, struct nfs4_client, cl_namenode); 4867ac55fdc4SJeff Layton rb_erase(tmp, &unconf_name_tree); 48680d22f68fSJ. Bruce Fields destroy_client(clp); 48691da177e4SLinus Torvalds } 4870ac55fdc4SJeff Layton 48711da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 48721da177e4SLinus Torvalds spin_lock(&recall_lock); 48731da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 48741da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 48751da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 48761da177e4SLinus Torvalds } 48771da177e4SLinus Torvalds spin_unlock(&recall_lock); 48781da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 48791da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 48801da177e4SLinus Torvalds unhash_delegation(dp); 48811da177e4SLinus Torvalds } 48821da177e4SLinus Torvalds 48832a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 48842a4317c5SJeff Layton put_net(&init_net); 48851da177e4SLinus Torvalds } 48861da177e4SLinus Torvalds 48871da177e4SLinus Torvalds void 48881da177e4SLinus Torvalds nfs4_state_shutdown(void) 48891da177e4SLinus Torvalds { 48905e1533c7SStanislav Kinsbursky struct net *net = &init_net; 48915e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 48925e1533c7SStanislav Kinsbursky 4893afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 48945e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 48955e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 48961da177e4SLinus Torvalds nfs4_lock_state(); 48978daae4dcSStanislav Kinsbursky __nfs4_state_shutdown(net); 48981da177e4SLinus Torvalds nfs4_unlock_state(); 4899c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 49001da177e4SLinus Torvalds } 49018b70484cSTigran Mkrtchyan 49028b70484cSTigran Mkrtchyan static void 49038b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 49048b70484cSTigran Mkrtchyan { 490537c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 490637c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 49078b70484cSTigran Mkrtchyan } 49088b70484cSTigran Mkrtchyan 49098b70484cSTigran Mkrtchyan static void 49108b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 49118b70484cSTigran Mkrtchyan { 491237c593c5STigran Mkrtchyan if (cstate->minorversion) { 491337c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 491437c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 491537c593c5STigran Mkrtchyan } 491637c593c5STigran Mkrtchyan } 491737c593c5STigran Mkrtchyan 491837c593c5STigran Mkrtchyan void 491937c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 492037c593c5STigran Mkrtchyan { 492137c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 49228b70484cSTigran Mkrtchyan } 49238b70484cSTigran Mkrtchyan 492462cd4a59STigran Mkrtchyan /* 492562cd4a59STigran Mkrtchyan * functions to set current state id 492662cd4a59STigran Mkrtchyan */ 49278b70484cSTigran Mkrtchyan void 49289428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 49299428fe1aSTigran Mkrtchyan { 49309428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 49319428fe1aSTigran Mkrtchyan } 49329428fe1aSTigran Mkrtchyan 49339428fe1aSTigran Mkrtchyan void 49348b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 49358b70484cSTigran Mkrtchyan { 49368b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 49378b70484cSTigran Mkrtchyan } 49388b70484cSTigran Mkrtchyan 49398b70484cSTigran Mkrtchyan void 494062cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 494162cd4a59STigran Mkrtchyan { 494262cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 494362cd4a59STigran Mkrtchyan } 494462cd4a59STigran Mkrtchyan 494562cd4a59STigran Mkrtchyan void 494662cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 494762cd4a59STigran Mkrtchyan { 494862cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 494962cd4a59STigran Mkrtchyan } 495062cd4a59STigran Mkrtchyan 495162cd4a59STigran Mkrtchyan /* 495262cd4a59STigran Mkrtchyan * functions to consume current state id 495362cd4a59STigran Mkrtchyan */ 49541e97b519STigran Mkrtchyan 49551e97b519STigran Mkrtchyan void 49569428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 49579428fe1aSTigran Mkrtchyan { 49589428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 49599428fe1aSTigran Mkrtchyan } 49609428fe1aSTigran Mkrtchyan 49619428fe1aSTigran Mkrtchyan void 49629428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 49639428fe1aSTigran Mkrtchyan { 49649428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 49659428fe1aSTigran Mkrtchyan } 49669428fe1aSTigran Mkrtchyan 49679428fe1aSTigran Mkrtchyan void 49681e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 49691e97b519STigran Mkrtchyan { 49701e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 49711e97b519STigran Mkrtchyan } 49721e97b519STigran Mkrtchyan 49731e97b519STigran Mkrtchyan void 49741e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 49751e97b519STigran Mkrtchyan { 49761e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 49771e97b519STigran Mkrtchyan } 49781e97b519STigran Mkrtchyan 497962cd4a59STigran Mkrtchyan void 49808b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 49818b70484cSTigran Mkrtchyan { 49828b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 49838b70484cSTigran Mkrtchyan } 49848b70484cSTigran Mkrtchyan 49858b70484cSTigran Mkrtchyan void 498662cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 49878b70484cSTigran Mkrtchyan { 498862cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 49898b70484cSTigran Mkrtchyan } 499030813e27STigran Mkrtchyan 499130813e27STigran Mkrtchyan void 499230813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 499330813e27STigran Mkrtchyan { 499430813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 499530813e27STigran Mkrtchyan } 499630813e27STigran Mkrtchyan 499730813e27STigran Mkrtchyan void 499830813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 499930813e27STigran Mkrtchyan { 500030813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 500130813e27STigran Mkrtchyan } 5002