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 3961da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3971da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3981da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3991da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 4001da177e4SLinus Torvalds 401ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 402ddc04c41SJ. Bruce Fields { 403ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 404ddc04c41SJ. Bruce Fields } 405ddc04c41SJ. Bruce Fields 406ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 407ddc04c41SJ. Bruce Fields { 408ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 409ddc04c41SJ. Bruce Fields } 410ddc04c41SJ. Bruce Fields 4111da177e4SLinus Torvalds /* 4121da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 4131da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 4141da177e4SLinus Torvalds * 4151da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 4161da177e4SLinus Torvalds * setclientid_confirmed info. 4171da177e4SLinus Torvalds * 4181da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 4191da177e4SLinus Torvalds * setclientid info. 4201da177e4SLinus Torvalds * 4211da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 4221da177e4SLinus Torvalds * for lease renewal. 4231da177e4SLinus Torvalds * 4241da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 4251da177e4SLinus Torvalds * for last close replay. 4261da177e4SLinus Torvalds */ 4271da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 4281da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 4291da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 4301da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 4311da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 4321da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 4331da177e4SLinus Torvalds static struct list_head client_lru; 4341da177e4SLinus Torvalds static struct list_head close_lru; 4351da177e4SLinus Torvalds 436f9d7562fSJ. Bruce Fields /* 437f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 438f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 439f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 440f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 441f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 442f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 443f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 444f9d7562fSJ. Bruce Fields * 445f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 446f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 447f9d7562fSJ. Bruce Fields * 448f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 449f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 450f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 451f9d7562fSJ. Bruce Fields * 452f9d7562fSJ. Bruce Fields * which we should reject. 453f9d7562fSJ. Bruce Fields */ 4545ae037e5SJeff Layton static unsigned int 4555ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 456f9d7562fSJ. Bruce Fields int i; 4575ae037e5SJeff Layton unsigned int access = 0; 458f9d7562fSJ. Bruce Fields 459f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 460f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 4615ae037e5SJeff Layton access |= i; 462f9d7562fSJ. Bruce Fields } 4635ae037e5SJeff Layton return access; 464f9d7562fSJ. Bruce Fields } 465f9d7562fSJ. Bruce Fields 4663a328614SJeff Layton static bool 467dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 468f9d7562fSJ. Bruce Fields unsigned int access, deny; 469f9d7562fSJ. Bruce Fields 4705ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 4715ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 472f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 4733a328614SJeff Layton return false; 4743a328614SJeff Layton return true; 475f9d7562fSJ. Bruce Fields } 476f9d7562fSJ. Bruce Fields 47782c5ff1bSJeff Layton /* set share access for a given stateid */ 47882c5ff1bSJeff Layton static inline void 47982c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 48082c5ff1bSJeff Layton { 48182c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 48282c5ff1bSJeff Layton } 48382c5ff1bSJeff Layton 48482c5ff1bSJeff Layton /* clear share access for a given stateid */ 48582c5ff1bSJeff Layton static inline void 48682c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 48782c5ff1bSJeff Layton { 48882c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 48982c5ff1bSJeff Layton } 49082c5ff1bSJeff Layton 49182c5ff1bSJeff Layton /* test whether a given stateid has access */ 49282c5ff1bSJeff Layton static inline bool 49382c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 49482c5ff1bSJeff Layton { 49582c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 49682c5ff1bSJeff Layton } 49782c5ff1bSJeff Layton 498ce0fc43cSJeff Layton /* set share deny for a given stateid */ 499ce0fc43cSJeff Layton static inline void 500ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 501ce0fc43cSJeff Layton { 502ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 503ce0fc43cSJeff Layton } 504ce0fc43cSJeff Layton 505ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 506ce0fc43cSJeff Layton static inline void 507ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 508ce0fc43cSJeff Layton { 509ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 510ce0fc43cSJeff Layton } 511ce0fc43cSJeff Layton 512ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 513ce0fc43cSJeff Layton static inline bool 514ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 515ce0fc43cSJeff Layton { 516ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 517f9d7562fSJ. Bruce Fields } 518f9d7562fSJ. Bruce Fields 519f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 520f9d7562fSJ. Bruce Fields { 5218f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 522f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 523f9d7562fSJ. Bruce Fields return O_RDONLY; 524f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 525f9d7562fSJ. Bruce Fields return O_WRONLY; 526f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 527f9d7562fSJ. Bruce Fields return O_RDWR; 528f9d7562fSJ. Bruce Fields } 529f9d7562fSJ. Bruce Fields BUG(); 530f9d7562fSJ. Bruce Fields } 531f9d7562fSJ. Bruce Fields 53282c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 53382c5ff1bSJeff Layton static void 53482c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 53582c5ff1bSJeff Layton { 53682c5ff1bSJeff Layton int i; 53782c5ff1bSJeff Layton 53882c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 53982c5ff1bSJeff Layton if (test_access(i, stp)) 54082c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 54182c5ff1bSJeff Layton nfs4_access_to_omode(i)); 54282c5ff1bSJeff Layton clear_access(i, stp); 54382c5ff1bSJeff Layton } 54482c5ff1bSJeff Layton } 54582c5ff1bSJeff Layton 546dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 547529d7b2aSJ. Bruce Fields { 548529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 549529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 550529d7b2aSJ. Bruce Fields } 551529d7b2aSJ. Bruce Fields 552dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 553529d7b2aSJ. Bruce Fields { 55482c5ff1bSJeff Layton release_all_access(stp); 555a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5564665e2baSJ. Bruce Fields stp->st_file = NULL; 5574665e2baSJ. Bruce Fields } 5584665e2baSJ. Bruce Fields 559dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5604665e2baSJ. Bruce Fields { 561529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 562529d7b2aSJ. Bruce Fields } 563529d7b2aSJ. Bruce Fields 564dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 565529d7b2aSJ. Bruce Fields { 566529d7b2aSJ. Bruce Fields struct file *file; 567529d7b2aSJ. Bruce Fields 568529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5696136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 570529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 571529d7b2aSJ. Bruce Fields if (file) 572fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 57338c387b5SJ. Bruce Fields close_generic_stateid(stp); 574529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 575529d7b2aSJ. Bruce Fields } 576529d7b2aSJ. Bruce Fields 577fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 578529d7b2aSJ. Bruce Fields { 579dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 580529d7b2aSJ. Bruce Fields 581fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 582fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 583009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 584fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 585fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 586dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 587529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 588529d7b2aSJ. Bruce Fields } 589529d7b2aSJ. Bruce Fields } 590529d7b2aSJ. Bruce Fields 591fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 592529d7b2aSJ. Bruce Fields { 593fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 594fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 595529d7b2aSJ. Bruce Fields } 596529d7b2aSJ. Bruce Fields 597529d7b2aSJ. Bruce Fields static void 598dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 599529d7b2aSJ. Bruce Fields { 600fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 601529d7b2aSJ. Bruce Fields 602529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 603fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 604fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 605fe0750e5SJ. Bruce Fields release_lockowner(lo); 606529d7b2aSJ. Bruce Fields } 607529d7b2aSJ. Bruce Fields } 608529d7b2aSJ. Bruce Fields 60938c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 6102283963fSJ. Bruce Fields { 6112283963fSJ. Bruce Fields unhash_generic_stateid(stp); 6122283963fSJ. Bruce Fields release_stateid_lockowners(stp); 61338c387b5SJ. Bruce Fields close_generic_stateid(stp); 61438c387b5SJ. Bruce Fields } 61538c387b5SJ. Bruce Fields 61638c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 61738c387b5SJ. Bruce Fields { 61838c387b5SJ. Bruce Fields unhash_open_stateid(stp); 6196136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 6202283963fSJ. Bruce Fields free_generic_stateid(stp); 6212283963fSJ. Bruce Fields } 6222283963fSJ. Bruce Fields 623fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 624f1d110caSJ. Bruce Fields { 625dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 626f1d110caSJ. Bruce Fields 627fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 628fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 629fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 630fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 631dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 632f1d110caSJ. Bruce Fields release_open_stateid(stp); 633f1d110caSJ. Bruce Fields } 634f1d110caSJ. Bruce Fields } 635f1d110caSJ. Bruce Fields 636f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 637f7a4d872SJ. Bruce Fields { 638f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 639f7a4d872SJ. Bruce Fields 640f7a4d872SJ. Bruce Fields if (s) { 6416136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 642f7a4d872SJ. Bruce Fields free_generic_stateid(s); 643f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 644f7a4d872SJ. Bruce Fields } 645f7a4d872SJ. Bruce Fields } 646f7a4d872SJ. Bruce Fields 647fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 648f1d110caSJ. Bruce Fields { 649fe0750e5SJ. Bruce Fields unhash_openowner(oo); 650fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 651f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 652fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 653f1d110caSJ. Bruce Fields } 654f1d110caSJ. Bruce Fields 6555282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6565282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6575282fd72SMarc Eshel 6585282fd72SMarc Eshel static inline int 6595282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6605282fd72SMarc Eshel { 6615282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6625282fd72SMarc Eshel 6635282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6645282fd72SMarc Eshel } 6655282fd72SMarc Eshel 6668f199b82STrond Myklebust #ifdef NFSD_DEBUG 6675282fd72SMarc Eshel static inline void 6685282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6695282fd72SMarc Eshel { 6705282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6715282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6725282fd72SMarc Eshel } 6738f199b82STrond Myklebust #else 6748f199b82STrond Myklebust static inline void 6758f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6768f199b82STrond Myklebust { 6778f199b82STrond Myklebust } 6788f199b82STrond Myklebust #endif 6798f199b82STrond Myklebust 6805282fd72SMarc Eshel 681ec6b5d7bSAndy Adamson static void 682ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 683ec6b5d7bSAndy Adamson { 684ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 685ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 686ec6b5d7bSAndy Adamson 687ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 688ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 689ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 690ec6b5d7bSAndy Adamson sid->reserved = 0; 691ec6b5d7bSAndy Adamson } 692ec6b5d7bSAndy Adamson 693ec6b5d7bSAndy Adamson /* 694a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 695a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 696a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 697a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 698a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 699a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 700a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 701a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 702a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 703a649637cSAndy Adamson * for the SEQUENCE op response: 704ec6b5d7bSAndy Adamson */ 705a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 706a649637cSAndy Adamson 707557ce264SAndy Adamson static void 708557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 709557ce264SAndy Adamson { 710557ce264SAndy Adamson int i; 711557ce264SAndy Adamson 712557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 713557ce264SAndy Adamson kfree(ses->se_slots[i]); 714557ce264SAndy Adamson } 715557ce264SAndy Adamson 716efe0cb6dSJ. Bruce Fields /* 717efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 718efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 719efe0cb6dSJ. Bruce Fields */ 720efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 721efe0cb6dSJ. Bruce Fields { 722efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 723efe0cb6dSJ. Bruce Fields } 724efe0cb6dSJ. Bruce Fields 7255b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 726ec6b5d7bSAndy Adamson { 7275b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 7285b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 729ec6b5d7bSAndy Adamson 7305b6feee9SJ. Bruce Fields return size; 731557ce264SAndy Adamson } 732557ce264SAndy Adamson 7335b6feee9SJ. Bruce Fields /* 7345b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 7355b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 73642b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 7375b6feee9SJ. Bruce Fields */ 7385b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 7395b6feee9SJ. Bruce Fields { 7405b6feee9SJ. Bruce Fields int avail; 7415b6feee9SJ. Bruce Fields 7425b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7435b6feee9SJ. Bruce Fields 7445b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7455b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7465b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7475b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7485b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7495b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7505b6feee9SJ. Bruce Fields 7515b6feee9SJ. Bruce Fields return num; 7525b6feee9SJ. Bruce Fields } 7535b6feee9SJ. Bruce Fields 7545b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7555b6feee9SJ. Bruce Fields { 7565b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7575b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7585b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7595b6feee9SJ. Bruce Fields } 7605b6feee9SJ. Bruce Fields 761a827bcb2SJ. Bruce Fields static struct nfsd4_session *__alloc_session(int slotsize, int numslots) 7625b6feee9SJ. Bruce Fields { 7635b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7645b6feee9SJ. Bruce Fields int mem, i; 765ec6b5d7bSAndy Adamson 766c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 767ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7685b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 769ec6b5d7bSAndy Adamson 7705b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7716c18ba9fSAlexandros Batsakis if (!new) 7725b6feee9SJ. Bruce Fields return NULL; 773ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7745b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7755b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7765b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7775b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 778ec6b5d7bSAndy Adamson goto out_free; 779ec6b5d7bSAndy Adamson } 7805b6feee9SJ. Bruce Fields return new; 7815b6feee9SJ. Bruce Fields out_free: 7825b6feee9SJ. Bruce Fields while (i--) 7835b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7845b6feee9SJ. Bruce Fields kfree(new); 7855b6feee9SJ. Bruce Fields return NULL; 7865b6feee9SJ. Bruce Fields } 7875b6feee9SJ. Bruce Fields 7885b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7895b6feee9SJ. Bruce Fields { 7905b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7915b6feee9SJ. Bruce Fields 7925b6feee9SJ. Bruce Fields new->maxreqs = numslots; 793d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 794d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7955b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7965b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7975b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7985b6feee9SJ. Bruce Fields } 7995b6feee9SJ. Bruce Fields 80019cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 80119cf5c02SJ. Bruce Fields { 80219cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 80319cf5c02SJ. Bruce Fields kfree(c); 80419cf5c02SJ. Bruce Fields } 80519cf5c02SJ. Bruce Fields 80619cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 80719cf5c02SJ. Bruce Fields { 80819cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 80919cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 81019cf5c02SJ. Bruce Fields 81119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 81219cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 81319cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 81419cf5c02SJ. Bruce Fields free_conn(c); 81519cf5c02SJ. Bruce Fields } 81619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 817eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 81819cf5c02SJ. Bruce Fields } 81919cf5c02SJ. Bruce Fields 820d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 821c7662518SJ. Bruce Fields { 822c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 823c7662518SJ. Bruce Fields 824c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 825c7662518SJ. Bruce Fields if (!conn) 826db90681dSJ. Bruce Fields return NULL; 827c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 828c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 829d29c374cSJ. Bruce Fields conn->cn_flags = flags; 830db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 831db90681dSJ. Bruce Fields return conn; 832db90681dSJ. Bruce Fields } 833db90681dSJ. Bruce Fields 834328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 835328ead28SJ. Bruce Fields { 836328ead28SJ. Bruce Fields conn->cn_session = ses; 837328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 838328ead28SJ. Bruce Fields } 839328ead28SJ. Bruce Fields 840db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 841db90681dSJ. Bruce Fields { 842db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 843c7662518SJ. Bruce Fields 844c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 845328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 846c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 847db90681dSJ. Bruce Fields } 848c7662518SJ. Bruce Fields 84921b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 850db90681dSJ. Bruce Fields { 85119cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 85221b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 853db90681dSJ. Bruce Fields } 854db90681dSJ. Bruce Fields 855e1ff371fSJ. Bruce Fields static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) 856db90681dSJ. Bruce Fields { 85721b75b01SJ. Bruce Fields int ret; 858db90681dSJ. Bruce Fields 859db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 86021b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 86121b75b01SJ. Bruce Fields if (ret) 86221b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 86321b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 8646a3b1563SJ. Bruce Fields if (conn->cn_flags & NFS4_CDFC4_BACK) { 86524119673SWeston Andros Adamson /* callback channel may be back up */ 86624119673SWeston Andros Adamson nfsd4_probe_callback(ses->se_client); 86724119673SWeston Andros Adamson } 868c7662518SJ. Bruce Fields } 869c7662518SJ. Bruce Fields 870e1ff371fSJ. Bruce Fields static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) 8711d1bc8f2SJ. Bruce Fields { 8721d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8731d1bc8f2SJ. Bruce Fields 874e1ff371fSJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) 8751d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 876e1ff371fSJ. Bruce Fields return alloc_conn(rqstp, dir); 8771d1bc8f2SJ. Bruce Fields } 8781d1bc8f2SJ. Bruce Fields 8791d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 88019cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 881c7662518SJ. Bruce Fields { 88219cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 88319cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 88419cf5c02SJ. Bruce Fields 88519cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 88619cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 88719cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 88819cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 88919cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 89019cf5c02SJ. Bruce Fields 89119cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 89219cf5c02SJ. Bruce Fields free_conn(c); 89319cf5c02SJ. Bruce Fields 89419cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 89519cf5c02SJ. Bruce Fields } 89619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 897c7662518SJ. Bruce Fields } 898c7662518SJ. Bruce Fields 8991377b69eSJ. Bruce Fields static void __free_session(struct nfsd4_session *ses) 9001377b69eSJ. Bruce Fields { 9011377b69eSJ. Bruce Fields nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); 9021377b69eSJ. Bruce Fields free_session_slots(ses); 9031377b69eSJ. Bruce Fields kfree(ses); 9041377b69eSJ. Bruce Fields } 9051377b69eSJ. Bruce Fields 906508dc6e1SBenny Halevy static void free_session(struct kref *kref) 907c7662518SJ. Bruce Fields { 908c7662518SJ. Bruce Fields struct nfsd4_session *ses; 909c7662518SJ. Bruce Fields 910bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 911c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 91219cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 9131377b69eSJ. Bruce Fields __free_session(ses); 914c7662518SJ. Bruce Fields } 915c7662518SJ. Bruce Fields 916508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 917508dc6e1SBenny Halevy { 918508dc6e1SBenny Halevy spin_lock(&client_lock); 919508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 920508dc6e1SBenny Halevy spin_unlock(&client_lock); 921508dc6e1SBenny Halevy } 922508dc6e1SBenny Halevy 923a827bcb2SJ. Bruce Fields static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan) 9245b6feee9SJ. Bruce Fields { 9255b6feee9SJ. Bruce Fields struct nfsd4_session *new; 9265b6feee9SJ. Bruce Fields int numslots, slotsize; 9275b6feee9SJ. Bruce Fields /* 9285b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 9295b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 9305b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 9315b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 9325b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 9335b6feee9SJ. Bruce Fields */ 9345b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 9355b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 936ced6dfe9SMi Jinlong if (numslots < 1) 937ced6dfe9SMi Jinlong return NULL; 9385b6feee9SJ. Bruce Fields 939a827bcb2SJ. Bruce Fields new = __alloc_session(slotsize, numslots); 9405b6feee9SJ. Bruce Fields if (!new) { 9415b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 942ac7c46f2SJ. Bruce Fields return NULL; 9435b6feee9SJ. Bruce Fields } 9445b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 945a827bcb2SJ. Bruce Fields return new; 946a827bcb2SJ. Bruce Fields } 947ec6b5d7bSAndy Adamson 9487c1f8b65SJ. Bruce Fields void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) 949a827bcb2SJ. Bruce Fields { 950a827bcb2SJ. Bruce Fields int idx; 951a827bcb2SJ. Bruce Fields 952ec6b5d7bSAndy Adamson new->se_client = clp; 953ec6b5d7bSAndy Adamson gen_sessionid(new); 954ec6b5d7bSAndy Adamson 955c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 956c7662518SJ. Bruce Fields 957ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 958ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9598b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 960c6bb3ca2SJ. Bruce Fields new->se_cb_sec = cses->cb_sec; 961ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9625b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9639089f1b4SBenny Halevy spin_lock(&client_lock); 964ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9654c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 966ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9674c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9689089f1b4SBenny Halevy spin_unlock(&client_lock); 969ec6b5d7bSAndy Adamson 970dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 971edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 972dcbeaa68SJ. Bruce Fields /* 973dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 974dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 975dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 976dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 977dcbeaa68SJ. Bruce Fields * future: 978dcbeaa68SJ. Bruce Fields */ 979edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 980edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 981edd76786SJ. Bruce Fields } 982ec6b5d7bSAndy Adamson } 983ec6b5d7bSAndy Adamson 9849089f1b4SBenny Halevy /* caller must hold client_lock */ 9855282fd72SMarc Eshel static struct nfsd4_session * 9865282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9875282fd72SMarc Eshel { 9885282fd72SMarc Eshel struct nfsd4_session *elem; 9895282fd72SMarc Eshel int idx; 9905282fd72SMarc Eshel 9915282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9925282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9935282fd72SMarc Eshel /* Search in the appropriate list */ 9945282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 9955282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 9965282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 9975282fd72SMarc Eshel return elem; 9985282fd72SMarc Eshel } 9995282fd72SMarc Eshel } 10005282fd72SMarc Eshel 10015282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 10025282fd72SMarc Eshel return NULL; 10035282fd72SMarc Eshel } 10045282fd72SMarc Eshel 10059089f1b4SBenny Halevy /* caller must hold client_lock */ 10067116ed6bSAndy Adamson static void 10075282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 10087116ed6bSAndy Adamson { 10097116ed6bSAndy Adamson list_del(&ses->se_hash); 10104c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 10117116ed6bSAndy Adamson list_del(&ses->se_perclnt); 10124c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 10135282fd72SMarc Eshel } 10145282fd72SMarc Eshel 101536acb66bSBenny Halevy /* must be called under the client_lock */ 10161da177e4SLinus Torvalds static inline void 101736acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 10181da177e4SLinus Torvalds { 101907cd4909SBenny Halevy if (is_client_expired(clp)) { 10207447758bSJ. Bruce Fields WARN_ON(1); 10217447758bSJ. Bruce Fields printk("%s: client (clientid %08x/%08x) already expired\n", 102207cd4909SBenny Halevy __func__, 102307cd4909SBenny Halevy clp->cl_clientid.cl_boot, 102407cd4909SBenny Halevy clp->cl_clientid.cl_id); 102507cd4909SBenny Halevy return; 102607cd4909SBenny Halevy } 102707cd4909SBenny Halevy 10281da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 10291da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 10301da177e4SLinus Torvalds clp->cl_clientid.cl_id); 10311da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 10321da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds 103536acb66bSBenny Halevy static inline void 103636acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 103736acb66bSBenny Halevy { 103836acb66bSBenny Halevy spin_lock(&client_lock); 103936acb66bSBenny Halevy renew_client_locked(clp); 104036acb66bSBenny Halevy spin_unlock(&client_lock); 104136acb66bSBenny Halevy } 104236acb66bSBenny Halevy 10431da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10441da177e4SLinus Torvalds static int 10452c142baaSStanislav Kinsbursky STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) 10461da177e4SLinus Torvalds { 10472c142baaSStanislav Kinsbursky if (clid->cl_boot == nn->boot_time) 10481da177e4SLinus Torvalds return 0; 104960adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 10502c142baaSStanislav Kinsbursky clid->cl_boot, clid->cl_id, nn->boot_time); 10511da177e4SLinus Torvalds return 1; 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds /* 10551da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10561da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10571da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10581da177e4SLinus Torvalds */ 105935bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10601da177e4SLinus Torvalds { 10611da177e4SLinus Torvalds struct nfs4_client *clp; 10621da177e4SLinus Torvalds 106335bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 106435bba9a3SJ. Bruce Fields if (clp == NULL) 106535bba9a3SJ. Bruce Fields return NULL; 106667114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 106735bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 106835bba9a3SJ. Bruce Fields kfree(clp); 106935bba9a3SJ. Bruce Fields return NULL; 107035bba9a3SJ. Bruce Fields } 10711da177e4SLinus Torvalds clp->cl_name.len = name.len; 10721da177e4SLinus Torvalds return clp; 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds static inline void 10761da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10771da177e4SLinus Torvalds { 1078bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 1079792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1080792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1081792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1082792c95ddSJ. Bruce Fields se_perclnt); 1083792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1084508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1085792c95ddSJ. Bruce Fields } 108603a4e1f6SJ. Bruce Fields free_svc_cred(&clp->cl_cred); 10871da177e4SLinus Torvalds kfree(clp->cl_name.data); 10881da177e4SLinus Torvalds kfree(clp); 10891da177e4SLinus Torvalds } 10901da177e4SLinus Torvalds 1091d7682988SBenny Halevy void 1092d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1093d7682988SBenny Halevy { 1094d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1095d7682988SBenny Halevy 1096d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1097d7682988SBenny Halevy return; 1098d7682988SBenny Halevy if (is_client_expired(clp)) { 1099d7682988SBenny Halevy free_client(clp); 1100d7682988SBenny Halevy session->se_client = NULL; 1101d7682988SBenny Halevy } else 1102d7682988SBenny Halevy renew_client_locked(clp); 1103d7682988SBenny Halevy spin_unlock(&client_lock); 1104d7682988SBenny Halevy } 1105d7682988SBenny Halevy 110684d38ac9SBenny Halevy /* must be called under the client_lock */ 110784d38ac9SBenny Halevy static inline void 110884d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 110984d38ac9SBenny Halevy { 1110792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1111792c95ddSJ. Bruce Fields 111207cd4909SBenny Halevy mark_client_expired(clp); 111384d38ac9SBenny Halevy list_del(&clp->cl_lru); 11144c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1115792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1116792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 11174c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 111884d38ac9SBenny Halevy } 111984d38ac9SBenny Halevy 11201da177e4SLinus Torvalds static void 11210d22f68fSJ. Bruce Fields destroy_client(struct nfs4_client *clp) 11221da177e4SLinus Torvalds { 1123fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 11241da177e4SLinus Torvalds struct nfs4_delegation *dp; 11251da177e4SLinus Torvalds struct list_head reaplist; 11261da177e4SLinus Torvalds 11271da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 11281da177e4SLinus Torvalds spin_lock(&recall_lock); 1129ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1130ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1131ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11321da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds spin_unlock(&recall_lock); 11351da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11361da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11371da177e4SLinus Torvalds unhash_delegation(dp); 11381da177e4SLinus Torvalds } 1139ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1140fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1141fe0750e5SJ. Bruce Fields release_openowner(oo); 11421da177e4SLinus Torvalds } 11436ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11442bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11452bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 114684d38ac9SBenny Halevy list_del(&clp->cl_idhash); 114784d38ac9SBenny Halevy list_del(&clp->cl_strhash); 114884d38ac9SBenny Halevy spin_lock(&client_lock); 114984d38ac9SBenny Halevy unhash_client_locked(clp); 115046583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1151b12a05cbSJ. Bruce Fields free_client(clp); 115246583e25SBenny Halevy spin_unlock(&client_lock); 11531da177e4SLinus Torvalds } 11541da177e4SLinus Torvalds 11550d22f68fSJ. Bruce Fields static void expire_client(struct nfs4_client *clp) 11560d22f68fSJ. Bruce Fields { 11570d22f68fSJ. Bruce Fields nfsd4_client_record_remove(clp); 11580d22f68fSJ. Bruce Fields destroy_client(clp); 11590d22f68fSJ. Bruce Fields } 11600d22f68fSJ. Bruce Fields 116135bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 116235bba9a3SJ. Bruce Fields { 116335bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 116435bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11651da177e4SLinus Torvalds } 11661da177e4SLinus Torvalds 116735bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 116835bba9a3SJ. Bruce Fields { 11691da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11701da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11711da177e4SLinus Torvalds } 11721da177e4SLinus Torvalds 117303a4e1f6SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 117435bba9a3SJ. Bruce Fields { 117503a4e1f6SJ. Bruce Fields if (source->cr_principal) { 117603a4e1f6SJ. Bruce Fields target->cr_principal = 117703a4e1f6SJ. Bruce Fields kstrdup(source->cr_principal, GFP_KERNEL); 117803a4e1f6SJ. Bruce Fields if (target->cr_principal == NULL) 117903a4e1f6SJ. Bruce Fields return -ENOMEM; 118003a4e1f6SJ. Bruce Fields } else 118103a4e1f6SJ. Bruce Fields target->cr_principal = NULL; 1182d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 11831da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11841da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11851da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11861da177e4SLinus Torvalds get_group_info(target->cr_group_info); 118703a4e1f6SJ. Bruce Fields return 0; 11881da177e4SLinus Torvalds } 11891da177e4SLinus Torvalds 119035bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1191599e0a22SJ. Bruce Fields { 1192a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11931da177e4SLinus Torvalds } 11941da177e4SLinus Torvalds 11951da177e4SLinus Torvalds static int 1196599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1197599e0a22SJ. Bruce Fields { 1198599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 11991da177e4SLinus Torvalds } 12001da177e4SLinus Torvalds 12011da177e4SLinus Torvalds static int 1202599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1203599e0a22SJ. Bruce Fields { 1204599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds 12078fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 12088fbba96eSJ. Bruce Fields { 12098fbba96eSJ. Bruce Fields int i; 12108fbba96eSJ. Bruce Fields 12118fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 12128fbba96eSJ. Bruce Fields return false; 12138fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 12148fbba96eSJ. Bruce Fields if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) 12158fbba96eSJ. Bruce Fields return false; 12168fbba96eSJ. Bruce Fields return true; 12178fbba96eSJ. Bruce Fields } 12188fbba96eSJ. Bruce Fields 121968eb3508SJ. Bruce Fields /* 122068eb3508SJ. Bruce Fields * RFC 3530 language requires clid_inuse be returned when the 122168eb3508SJ. Bruce Fields * "principal" associated with a requests differs from that previously 122268eb3508SJ. Bruce Fields * used. We use uid, gid's, and gss principal string as our best 122368eb3508SJ. Bruce Fields * approximation. We also don't want to allow non-gss use of a client 122468eb3508SJ. Bruce Fields * established using gss: in theory cr_principal should catch that 122568eb3508SJ. Bruce Fields * change, but in practice cr_principal can be null even in the gss case 122668eb3508SJ. Bruce Fields * since gssd doesn't always pass down a principal string. 122768eb3508SJ. Bruce Fields */ 122868eb3508SJ. Bruce Fields static bool is_gss_cred(struct svc_cred *cr) 122968eb3508SJ. Bruce Fields { 123068eb3508SJ. Bruce Fields /* Is cr_flavor one of the gss "pseudoflavors"?: */ 123168eb3508SJ. Bruce Fields return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); 123268eb3508SJ. Bruce Fields } 123368eb3508SJ. Bruce Fields 123468eb3508SJ. Bruce Fields 12355559b50aSVivek Trivedi static bool 1236599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1237599e0a22SJ. Bruce Fields { 123868eb3508SJ. Bruce Fields if ((is_gss_cred(cr1) != is_gss_cred(cr2)) 1239d5497fc6SJ. Bruce Fields || (cr1->cr_uid != cr2->cr_uid) 12408fbba96eSJ. Bruce Fields || (cr1->cr_gid != cr2->cr_gid) 12418fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 12428fbba96eSJ. Bruce Fields return false; 12438fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 12448fbba96eSJ. Bruce Fields return true; 12458fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 12468fbba96eSJ. Bruce Fields return false; 12475559b50aSVivek Trivedi return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 12505ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 12515ec7b46cSJ. Bruce Fields { 12525ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 12532c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 12545ec7b46cSJ. Bruce Fields 12552c142baaSStanislav Kinsbursky clp->cl_clientid.cl_boot = nn->boot_time; 12561da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 12571da177e4SLinus Torvalds } 12581da177e4SLinus Torvalds 1259deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1260deda2faaSJ. Bruce Fields { 1261ab4684d1SChuck Lever __be32 verf[2]; 1262deda2faaSJ. Bruce Fields static u32 i; 12631da177e4SLinus Torvalds 1264ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1265ab4684d1SChuck Lever verf[1] = (__be32)i++; 1266ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 12671da177e4SLinus Torvalds } 12681da177e4SLinus Torvalds 126938c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 12704581d140SJ. Bruce Fields { 127138c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 12724581d140SJ. Bruce Fields } 12734d71ab87SJ. Bruce Fields 127438c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1275f459e453SJ. Bruce Fields { 1276f459e453SJ. Bruce Fields struct nfs4_stid *s; 1277f459e453SJ. Bruce Fields 127838c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1279f459e453SJ. Bruce Fields if (!s) 1280f459e453SJ. Bruce Fields return NULL; 1281f459e453SJ. Bruce Fields if (typemask & s->sc_type) 12824d71ab87SJ. Bruce Fields return s; 12834581d140SJ. Bruce Fields return NULL; 12844581d140SJ. Bruce Fields } 12854581d140SJ. Bruce Fields 1286b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1287b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1288b09333c4SRicardo Labiaga { 1289b09333c4SRicardo Labiaga struct nfs4_client *clp; 1290b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 129103a4e1f6SJ. Bruce Fields int ret; 1292b09333c4SRicardo Labiaga 1293b09333c4SRicardo Labiaga clp = alloc_client(name); 1294b09333c4SRicardo Labiaga if (clp == NULL) 1295b09333c4SRicardo Labiaga return NULL; 1296b09333c4SRicardo Labiaga 1297792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 129803a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 129903a4e1f6SJ. Bruce Fields if (ret) { 1300508dc6e1SBenny Halevy spin_lock(&client_lock); 1301b09333c4SRicardo Labiaga free_client(clp); 1302508dc6e1SBenny Halevy spin_unlock(&client_lock); 1303b09333c4SRicardo Labiaga return NULL; 1304b09333c4SRicardo Labiaga } 130538c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1306b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 130746583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 130877a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1309b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1310b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 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; 1324b09333c4SRicardo Labiaga return clp; 1325b09333c4SRicardo Labiaga } 1326b09333c4SRicardo Labiaga 1327fd39ca9aSNeilBrown static void 13281da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 13291da177e4SLinus Torvalds { 13301da177e4SLinus Torvalds unsigned int idhashval; 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 13331da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13341da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 133536acb66bSBenny Halevy renew_client(clp); 13361da177e4SLinus Torvalds } 13371da177e4SLinus Torvalds 1338fd39ca9aSNeilBrown static void 13391da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 13401da177e4SLinus Torvalds { 13411da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13421da177e4SLinus Torvalds unsigned int strhashval; 13431da177e4SLinus Torvalds 13441da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1345f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1346a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1347328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 13481da177e4SLinus Torvalds renew_client(clp); 13491da177e4SLinus Torvalds } 13501da177e4SLinus Torvalds 13511da177e4SLinus Torvalds static struct nfs4_client * 1352d15c077eSJ. Bruce Fields find_confirmed_client(clientid_t *clid, bool sessions) 13531da177e4SLinus Torvalds { 13541da177e4SLinus Torvalds struct nfs4_client *clp; 13551da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1358a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1359d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 1360d15c077eSJ. Bruce Fields return NULL; 1361a50d2ad1SJ. Bruce Fields renew_client(clp); 13621da177e4SLinus Torvalds return clp; 13631da177e4SLinus Torvalds } 1364a50d2ad1SJ. Bruce Fields } 13651da177e4SLinus Torvalds return NULL; 13661da177e4SLinus Torvalds } 13671da177e4SLinus Torvalds 13681da177e4SLinus Torvalds static struct nfs4_client * 1369d15c077eSJ. Bruce Fields find_unconfirmed_client(clientid_t *clid, bool sessions) 13701da177e4SLinus Torvalds { 13711da177e4SLinus Torvalds struct nfs4_client *clp; 13721da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1375d15c077eSJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1376d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 1377d15c077eSJ. Bruce Fields return NULL; 13781da177e4SLinus Torvalds return clp; 13791da177e4SLinus Torvalds } 1380d15c077eSJ. Bruce Fields } 13811da177e4SLinus Torvalds return NULL; 13821da177e4SLinus Torvalds } 13831da177e4SLinus Torvalds 13846e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1385a1bcecd2SAndy Adamson { 13866e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1387a1bcecd2SAndy Adamson } 1388a1bcecd2SAndy Adamson 138928ce6054SNeilBrown static struct nfs4_client * 1390e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 139128ce6054SNeilBrown { 139228ce6054SNeilBrown struct nfs4_client *clp; 139328ce6054SNeilBrown 139428ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1395e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 139628ce6054SNeilBrown return clp; 139728ce6054SNeilBrown } 139828ce6054SNeilBrown return NULL; 139928ce6054SNeilBrown } 140028ce6054SNeilBrown 140128ce6054SNeilBrown static struct nfs4_client * 1402e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 140328ce6054SNeilBrown { 140428ce6054SNeilBrown struct nfs4_client *clp; 140528ce6054SNeilBrown 140628ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1407e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 140828ce6054SNeilBrown return clp; 140928ce6054SNeilBrown } 141028ce6054SNeilBrown return NULL; 141128ce6054SNeilBrown } 141228ce6054SNeilBrown 1413fd39ca9aSNeilBrown static void 14146f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 14151da177e4SLinus Torvalds { 141607263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 14176f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 14186f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 14197077ecbaSJeff Layton unsigned short expected_family; 14201da177e4SLinus Torvalds 14217077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 14227077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 14237077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 14247077ecbaSJeff Layton expected_family = AF_INET; 14257077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 14267077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 14277077ecbaSJeff Layton expected_family = AF_INET6; 14287077ecbaSJeff Layton else 14291da177e4SLinus Torvalds goto out_err; 14301da177e4SLinus Torvalds 1431f2ac4dc9SStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, 1432aa9a4ec7SJeff Layton se->se_callback_addr_len, 143307263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 143407263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1435aa9a4ec7SJeff Layton 143607263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 14371da177e4SLinus Torvalds goto out_err; 1438aa9a4ec7SJeff Layton 143907263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 144007263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1441fbf4665fSJeff Layton 144207263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 144307263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1444849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 14451da177e4SLinus Torvalds return; 14461da177e4SLinus Torvalds out_err: 144707263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 144807263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1449849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 14501da177e4SLinus Torvalds "will not receive delegations\n", 14511da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 14521da177e4SLinus Torvalds 14531da177e4SLinus Torvalds return; 14541da177e4SLinus Torvalds } 14551da177e4SLinus Torvalds 1456074fe897SAndy Adamson /* 1457557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1458074fe897SAndy Adamson */ 1459074fe897SAndy Adamson void 1460074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1461074fe897SAndy Adamson { 1462557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1463557ce264SAndy Adamson unsigned int base; 1464074fe897SAndy Adamson 1465557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1466074fe897SAndy Adamson 1467557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1468557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1469bf864a31SAndy Adamson 1470bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1471bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1472557ce264SAndy Adamson slot->sl_datalen = 0; 1473bf864a31SAndy Adamson return; 1474bf864a31SAndy Adamson } 1475557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1476557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1477557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1478557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1479557ce264SAndy Adamson slot->sl_datalen)) 1480557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1481557ce264SAndy Adamson return; 1482074fe897SAndy Adamson } 1483074fe897SAndy Adamson 1484074fe897SAndy Adamson /* 1485abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1486abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1487abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1488abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1489abfabf8cSAndy Adamson * 1490074fe897SAndy Adamson */ 1491abfabf8cSAndy Adamson static __be32 1492abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1493abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1494074fe897SAndy Adamson { 1495abfabf8cSAndy Adamson struct nfsd4_op *op; 1496abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1497074fe897SAndy Adamson 1498abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1499abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1500abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1501abfabf8cSAndy Adamson 1502abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 150373e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1504abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1505abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1506abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1507074fe897SAndy Adamson } 1508abfabf8cSAndy Adamson return op->status; 1509074fe897SAndy Adamson } 1510074fe897SAndy Adamson 1511074fe897SAndy Adamson /* 1512557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1513557ce264SAndy Adamson * session values. 1514074fe897SAndy Adamson */ 1515074fe897SAndy Adamson __be32 1516bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1517bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1518074fe897SAndy Adamson { 1519557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1520074fe897SAndy Adamson __be32 status; 1521074fe897SAndy Adamson 1522557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1523074fe897SAndy Adamson 1524abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1525abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1526abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1527abfabf8cSAndy Adamson return status; 1528074fe897SAndy Adamson 1529557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1530557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1531074fe897SAndy Adamson 1532557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1533557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1534557ce264SAndy Adamson status = slot->sl_status; 1535074fe897SAndy Adamson 1536074fe897SAndy Adamson return status; 1537074fe897SAndy Adamson } 1538074fe897SAndy Adamson 15390733d213SAndy Adamson /* 15400733d213SAndy Adamson * Set the exchange_id flags returned by the server. 15410733d213SAndy Adamson */ 15420733d213SAndy Adamson static void 15430733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 15440733d213SAndy Adamson { 15450733d213SAndy Adamson /* pNFS is not supported */ 15460733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 15470733d213SAndy Adamson 15480733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 15490733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 15500733d213SAndy Adamson 15510733d213SAndy Adamson /* set the wire flags to return to client. */ 15520733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 15530733d213SAndy Adamson } 15540733d213SAndy Adamson 1555631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 1556631fc9eaSJ. Bruce Fields { 1557631fc9eaSJ. Bruce Fields /* 1558631fc9eaSJ. Bruce Fields * Note clp->cl_openowners check isn't quite right: there's no 1559631fc9eaSJ. Bruce Fields * need to count owners without stateid's. 1560631fc9eaSJ. Bruce Fields * 1561631fc9eaSJ. Bruce Fields * Also note we should probably be using this in 4.0 case too. 1562631fc9eaSJ. Bruce Fields */ 15636eccece9SJ. Bruce Fields return !list_empty(&clp->cl_openowners) 15646eccece9SJ. Bruce Fields || !list_empty(&clp->cl_delegations) 15656eccece9SJ. Bruce Fields || !list_empty(&clp->cl_sessions); 1566631fc9eaSJ. Bruce Fields } 1567631fc9eaSJ. Bruce Fields 1568b37ad28bSAl Viro __be32 1569069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1570069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1571069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1572069b6ad4SAndy Adamson { 15730733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 157457b7b43bSJ. Bruce Fields __be32 status; 15750733d213SAndy Adamson unsigned int strhashval; 15760733d213SAndy Adamson char dname[HEXDIR_LEN]; 1577363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 15780733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1579363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 158083e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 15810733d213SAndy Adamson 1582363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 15830733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1584363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 15850733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1586363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 15870733d213SAndy Adamson 1588a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 15890733d213SAndy Adamson return nfserr_inval; 15900733d213SAndy Adamson 15910733d213SAndy Adamson /* Currently only support SP4_NONE */ 15920733d213SAndy Adamson switch (exid->spa_how) { 15930733d213SAndy Adamson case SP4_NONE: 15940733d213SAndy Adamson break; 15950733d213SAndy Adamson case SP4_SSV: 1596044bc1d4SJ. Bruce Fields return nfserr_serverfault; 15970733d213SAndy Adamson default: 15980733d213SAndy Adamson BUG(); /* checked by xdr code */ 15990733d213SAndy Adamson case SP4_MACH_CRED: 16000733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 16010733d213SAndy Adamson } 16020733d213SAndy Adamson 16030733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 16040733d213SAndy Adamson 16050733d213SAndy Adamson if (status) 16062786cc3aSJ. Bruce Fields return status; 16070733d213SAndy Adamson 16080733d213SAndy Adamson strhashval = clientstr_hashval(dname); 16090733d213SAndy Adamson 16102dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 16110733d213SAndy Adamson nfs4_lock_state(); 1612e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 16130733d213SAndy Adamson if (conf) { 161483e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 161583e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 161683e08fd4SJ. Bruce Fields 1617136e658dSJ. Bruce Fields if (update) { 1618136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 16192dbb269dSJ. Bruce Fields status = nfserr_inval; 1620e203d506SJ. Bruce Fields goto out; 1621e203d506SJ. Bruce Fields } 16222dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 16230733d213SAndy Adamson status = nfserr_perm; 16240733d213SAndy Adamson goto out; 16250733d213SAndy Adamson } 16262dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 16270733d213SAndy Adamson status = nfserr_not_same; 16280733d213SAndy Adamson goto out; 16290733d213SAndy Adamson } 1630136e658dSJ. Bruce Fields /* case 6 */ 16310733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 16320733d213SAndy Adamson new = conf; 16330733d213SAndy Adamson goto out_copy; 16346ddbbbfeSMike Sager } 1635136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 1636631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 1637136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 1638136e658dSJ. Bruce Fields goto out; 1639136e658dSJ. Bruce Fields } 1640b9831b59SJ. Bruce Fields expire_client(conf); 1641b9831b59SJ. Bruce Fields goto out_new; 1642631fc9eaSJ. Bruce Fields } 1643136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 16440f1ba0efSJ. Bruce Fields conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 1645136e658dSJ. Bruce Fields new = conf; 1646136e658dSJ. Bruce Fields goto out_copy; 1647136e658dSJ. Bruce Fields } 16482dbb269dSJ. Bruce Fields /* case 5, client reboot */ 16490733d213SAndy Adamson goto out_new; 16500733d213SAndy Adamson } 16516ddbbbfeSMike Sager 16522dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 16530733d213SAndy Adamson status = nfserr_noent; 16540733d213SAndy Adamson goto out; 16550733d213SAndy Adamson } 16560733d213SAndy Adamson 1657e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 16582dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 16590733d213SAndy Adamson expire_client(unconf); 16600733d213SAndy Adamson 16612dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 16620733d213SAndy Adamson out_new: 1663b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 16640733d213SAndy Adamson if (new == NULL) { 16654731030dSJ. Bruce Fields status = nfserr_jukebox; 16660733d213SAndy Adamson goto out; 16670733d213SAndy Adamson } 1668c116a0afSJ. Bruce Fields new->cl_minorversion = 1; 16690733d213SAndy Adamson 16700733d213SAndy Adamson gen_clid(new); 16710733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 16720733d213SAndy Adamson out_copy: 16730733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 16740733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 16750733d213SAndy Adamson 1676778df3f0SJ. Bruce Fields exid->seqid = new->cl_cs_slot.sl_seqid + 1; 16770733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 16780733d213SAndy Adamson 16790733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 168049557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 16810733d213SAndy Adamson status = nfs_ok; 16820733d213SAndy Adamson 16830733d213SAndy Adamson out: 16840733d213SAndy Adamson nfs4_unlock_state(); 16850733d213SAndy Adamson return status; 1686069b6ad4SAndy Adamson } 1687069b6ad4SAndy Adamson 168857b7b43bSJ. Bruce Fields static __be32 168988e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1690b85d4c01SBenny Halevy { 169188e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 169288e588d5SAndy Adamson slot_seqid); 1693b85d4c01SBenny Halevy 1694b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 169588e588d5SAndy Adamson if (slot_inuse) { 169688e588d5SAndy Adamson if (seqid == slot_seqid) 1697b85d4c01SBenny Halevy return nfserr_jukebox; 1698b85d4c01SBenny Halevy else 1699b85d4c01SBenny Halevy return nfserr_seq_misordered; 1700b85d4c01SBenny Halevy } 1701f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 170288e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1703b85d4c01SBenny Halevy return nfs_ok; 170488e588d5SAndy Adamson if (seqid == slot_seqid) 1705b85d4c01SBenny Halevy return nfserr_replay_cache; 1706b85d4c01SBenny Halevy return nfserr_seq_misordered; 1707b85d4c01SBenny Halevy } 1708b85d4c01SBenny Halevy 170949557cc7SAndy Adamson /* 171049557cc7SAndy Adamson * Cache the create session result into the create session single DRC 171149557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 171249557cc7SAndy Adamson * Do this for solo or embedded create session operations. 171349557cc7SAndy Adamson */ 171449557cc7SAndy Adamson static void 171549557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 171657b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 171749557cc7SAndy Adamson { 171849557cc7SAndy Adamson slot->sl_status = nfserr; 171949557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 172049557cc7SAndy Adamson } 172149557cc7SAndy Adamson 172249557cc7SAndy Adamson static __be32 172349557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 172449557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 172549557cc7SAndy Adamson { 172649557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 172749557cc7SAndy Adamson return slot->sl_status; 172849557cc7SAndy Adamson } 172949557cc7SAndy Adamson 17301b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 17311b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 17321b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17331b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 17341b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17351b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 17361b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 17371b74c25bSMi Jinlong 17381b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 17391b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 17401b74c25bSMi Jinlong 1 + /* status */ \ 17411b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17421b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 17431b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17441b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 17451b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 17461b74c25bSMi Jinlong 174757b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 17481b74c25bSMi Jinlong { 17491b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 17501b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 17511b74c25bSMi Jinlong } 17521b74c25bSMi Jinlong 1753069b6ad4SAndy Adamson __be32 1754069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1755069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1756069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1757069b6ad4SAndy Adamson { 1758363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1759ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1760ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 176181f0b2a4SJ. Bruce Fields struct nfsd4_conn *conn; 176249557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 176357b7b43bSJ. Bruce Fields __be32 status = 0; 1764ec6b5d7bSAndy Adamson 1765a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1766a62573dcSMi Jinlong return nfserr_inval; 176749730501SJ. Bruce Fields if (check_forechannel_attrs(cr_ses->fore_channel)) 176849730501SJ. Bruce Fields return nfserr_toosmall; 176981f0b2a4SJ. Bruce Fields new = alloc_session(&cr_ses->fore_channel); 177081f0b2a4SJ. Bruce Fields if (!new) 177181f0b2a4SJ. Bruce Fields return nfserr_jukebox; 177281f0b2a4SJ. Bruce Fields status = nfserr_jukebox; 177381f0b2a4SJ. Bruce Fields conn = alloc_conn_from_crses(rqstp, cr_ses); 177481f0b2a4SJ. Bruce Fields if (!conn) 177581f0b2a4SJ. Bruce Fields goto out_free_session; 1776a62573dcSMi Jinlong 1777ec6b5d7bSAndy Adamson nfs4_lock_state(); 1778d15c077eSJ. Bruce Fields unconf = find_unconfirmed_client(&cr_ses->clientid, true); 1779d15c077eSJ. Bruce Fields conf = find_confirmed_client(&cr_ses->clientid, true); 1780ec6b5d7bSAndy Adamson 1781ec6b5d7bSAndy Adamson if (conf) { 178249557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 178349557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 178438eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 178549557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 178681f0b2a4SJ. Bruce Fields goto out_free_conn; 178749557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1788ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 178981f0b2a4SJ. Bruce Fields goto out_free_conn; 1790ec6b5d7bSAndy Adamson } 1791ec6b5d7bSAndy Adamson } else if (unconf) { 17928f9d3d3bSJ. Bruce Fields unsigned int hash; 17938f9d3d3bSJ. Bruce Fields struct nfs4_client *old; 1794ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1795363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1796ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 179781f0b2a4SJ. Bruce Fields goto out_free_conn; 1798ec6b5d7bSAndy Adamson } 179949557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 180049557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 180138eb76a5SAndy Adamson if (status) { 180238eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1803ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 180481f0b2a4SJ. Bruce Fields goto out_free_conn; 1805ec6b5d7bSAndy Adamson } 18068f9d3d3bSJ. Bruce Fields hash = clientstr_hashval(unconf->cl_recdir); 18078f9d3d3bSJ. Bruce Fields old = find_confirmed_client_by_str(unconf->cl_recdir, hash); 18088f9d3d3bSJ. Bruce Fields if (old) 18098f9d3d3bSJ. Bruce Fields expire_client(old); 18108f9d3d3bSJ. Bruce Fields move_to_confirmed(unconf); 1811ec6b5d7bSAndy Adamson conf = unconf; 1812ec6b5d7bSAndy Adamson } else { 1813ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 181481f0b2a4SJ. Bruce Fields goto out_free_conn; 1815ec6b5d7bSAndy Adamson } 181681f0b2a4SJ. Bruce Fields status = nfs_ok; 18178323c3b2SJ. Bruce Fields /* 1818408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1819408b79bcSJ. Bruce Fields */ 1820408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1821408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1822408b79bcSJ. Bruce Fields 182381f0b2a4SJ. Bruce Fields init_session(rqstp, new, conf, cr_ses); 182481f0b2a4SJ. Bruce Fields nfsd4_init_conn(rqstp, conn, new); 182581f0b2a4SJ. Bruce Fields 1826ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1827ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 182812050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 182912050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 183086c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 183149557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1832ec6b5d7bSAndy Adamson 183349557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 183449557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 1835ec6b5d7bSAndy Adamson out: 1836ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1837ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1838ec6b5d7bSAndy Adamson return status; 183981f0b2a4SJ. Bruce Fields out_free_conn: 184081f0b2a4SJ. Bruce Fields free_conn(conn); 184181f0b2a4SJ. Bruce Fields out_free_session: 184281f0b2a4SJ. Bruce Fields __free_session(new); 184381f0b2a4SJ. Bruce Fields goto out; 1844069b6ad4SAndy Adamson } 1845069b6ad4SAndy Adamson 184657716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 184757716355SJ. Bruce Fields { 184857716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 184957716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 185057716355SJ. Bruce Fields 185157716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 185257716355SJ. Bruce Fields } 185357716355SJ. Bruce Fields 18541d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 18551d1bc8f2SJ. Bruce Fields { 18561d1bc8f2SJ. Bruce Fields switch (*dir) { 18571d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 18581d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 18591d1bc8f2SJ. Bruce Fields return nfs_ok; 18601d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 18611d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 18621d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 18631d1bc8f2SJ. Bruce Fields return nfs_ok; 18641d1bc8f2SJ. Bruce Fields }; 18651d1bc8f2SJ. Bruce Fields return nfserr_inval; 18661d1bc8f2SJ. Bruce Fields } 18671d1bc8f2SJ. Bruce Fields 1868cb73a9f4SJ. Bruce Fields __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) 1869cb73a9f4SJ. Bruce Fields { 1870cb73a9f4SJ. Bruce Fields struct nfsd4_session *session = cstate->session; 1871cb73a9f4SJ. Bruce Fields 1872cb73a9f4SJ. Bruce Fields spin_lock(&client_lock); 1873cb73a9f4SJ. Bruce Fields session->se_cb_prog = bc->bc_cb_program; 1874cb73a9f4SJ. Bruce Fields session->se_cb_sec = bc->bc_cb_sec; 1875cb73a9f4SJ. Bruce Fields spin_unlock(&client_lock); 1876cb73a9f4SJ. Bruce Fields 1877cb73a9f4SJ. Bruce Fields nfsd4_probe_callback(session->se_client); 1878cb73a9f4SJ. Bruce Fields 1879cb73a9f4SJ. Bruce Fields return nfs_ok; 1880cb73a9f4SJ. Bruce Fields } 1881cb73a9f4SJ. Bruce Fields 18821d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 18831d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 18841d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 18851d1bc8f2SJ. Bruce Fields { 18861d1bc8f2SJ. Bruce Fields __be32 status; 18873ba63671SJ. Bruce Fields struct nfsd4_conn *conn; 18881d1bc8f2SJ. Bruce Fields 18891d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 18901d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 18911d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 18921d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 18931d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 18941d1bc8f2SJ. Bruce Fields * client_lock iself: */ 18951d1bc8f2SJ. Bruce Fields if (cstate->session) { 18961d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 18971d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 18981d1bc8f2SJ. Bruce Fields } 18991d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 19001d1bc8f2SJ. Bruce Fields if (!cstate->session) 19011d1bc8f2SJ. Bruce Fields return nfserr_badsession; 19021d1bc8f2SJ. Bruce Fields 19031d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 19043ba63671SJ. Bruce Fields if (status) 19051db2b9ddSBryan Schumaker return status; 19063ba63671SJ. Bruce Fields conn = alloc_conn(rqstp, bcts->dir); 19073ba63671SJ. Bruce Fields if (!conn) 19083ba63671SJ. Bruce Fields return nfserr_jukebox; 1909e1ff371fSJ. Bruce Fields nfsd4_init_conn(rqstp, conn, cstate->session); 19103ba63671SJ. Bruce Fields return nfs_ok; 19111d1bc8f2SJ. Bruce Fields } 19121d1bc8f2SJ. Bruce Fields 19135d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 19145d4cec2fSJ. Bruce Fields { 19155d4cec2fSJ. Bruce Fields if (!session) 19165d4cec2fSJ. Bruce Fields return 0; 19175d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 19185d4cec2fSJ. Bruce Fields } 19195d4cec2fSJ. Bruce Fields 1920069b6ad4SAndy Adamson __be32 1921069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1922069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1923069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1924069b6ad4SAndy Adamson { 1925e10e0cfcSBenny Halevy struct nfsd4_session *ses; 192657b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1927e10e0cfcSBenny Halevy 1928e10e0cfcSBenny Halevy /* Notes: 1929e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1930e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1931e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1932e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1933e10e0cfcSBenny Halevy */ 1934e10e0cfcSBenny Halevy 19355d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 193657716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 193757716355SJ. Bruce Fields return nfserr_not_only_op; 193857716355SJ. Bruce Fields } 1939e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 19409089f1b4SBenny Halevy spin_lock(&client_lock); 1941e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1942e10e0cfcSBenny Halevy if (!ses) { 19439089f1b4SBenny Halevy spin_unlock(&client_lock); 1944e10e0cfcSBenny Halevy goto out; 1945e10e0cfcSBenny Halevy } 1946e10e0cfcSBenny Halevy 1947e10e0cfcSBenny Halevy unhash_session(ses); 19489089f1b4SBenny Halevy spin_unlock(&client_lock); 1949e10e0cfcSBenny Halevy 1950ab707e15SBenny Halevy nfs4_lock_state(); 195184f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1952ab707e15SBenny Halevy nfs4_unlock_state(); 195319cf5c02SJ. Bruce Fields 1954508dc6e1SBenny Halevy spin_lock(&client_lock); 195519cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1956508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1957508dc6e1SBenny Halevy spin_unlock(&client_lock); 1958e10e0cfcSBenny Halevy status = nfs_ok; 1959e10e0cfcSBenny Halevy out: 1960e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1961e10e0cfcSBenny Halevy return status; 1962069b6ad4SAndy Adamson } 1963069b6ad4SAndy Adamson 1964a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1965328ead28SJ. Bruce Fields { 1966328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1967328ead28SJ. Bruce Fields 1968328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1969a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1970328ead28SJ. Bruce Fields return c; 1971328ead28SJ. Bruce Fields } 1972328ead28SJ. Bruce Fields } 1973328ead28SJ. Bruce Fields return NULL; 1974328ead28SJ. Bruce Fields } 1975328ead28SJ. Bruce Fields 1976a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1977328ead28SJ. Bruce Fields { 1978328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1979a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 198021b75b01SJ. Bruce Fields int ret; 1981328ead28SJ. Bruce Fields 1982328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1983a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1984328ead28SJ. Bruce Fields if (c) { 1985328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1986328ead28SJ. Bruce Fields free_conn(new); 1987328ead28SJ. Bruce Fields return; 1988328ead28SJ. Bruce Fields } 1989328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1990328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 199121b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 199221b75b01SJ. Bruce Fields if (ret) 199321b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 199421b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1995328ead28SJ. Bruce Fields return; 1996328ead28SJ. Bruce Fields } 1997328ead28SJ. Bruce Fields 1998868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1999868b89c3SMi Jinlong { 2000868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 2001868b89c3SMi Jinlong 2002868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 2003868b89c3SMi Jinlong } 2004868b89c3SMi Jinlong 2005ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 2006ae82a8d0SMi Jinlong struct nfsd4_session *session) 2007ae82a8d0SMi Jinlong { 2008ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 2009ae82a8d0SMi Jinlong 2010ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 2011ae82a8d0SMi Jinlong } 2012ae82a8d0SMi Jinlong 2013069b6ad4SAndy Adamson __be32 2014b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 2015069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 2016069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 2017069b6ad4SAndy Adamson { 2018f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 2019b85d4c01SBenny Halevy struct nfsd4_session *session; 2020b85d4c01SBenny Halevy struct nfsd4_slot *slot; 2021a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 202257b7b43bSJ. Bruce Fields __be32 status; 2023b85d4c01SBenny Halevy 2024f9bb94c4SAndy Adamson if (resp->opcnt != 1) 2025f9bb94c4SAndy Adamson return nfserr_sequence_pos; 2026f9bb94c4SAndy Adamson 2027a663bdd8SJ. Bruce Fields /* 2028a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 2029a663bdd8SJ. Bruce Fields * below. 2030a663bdd8SJ. Bruce Fields */ 2031a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 2032a663bdd8SJ. Bruce Fields if (!conn) 2033a663bdd8SJ. Bruce Fields return nfserr_jukebox; 2034a663bdd8SJ. Bruce Fields 20359089f1b4SBenny Halevy spin_lock(&client_lock); 2036b85d4c01SBenny Halevy status = nfserr_badsession; 2037b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 2038b85d4c01SBenny Halevy if (!session) 2039b85d4c01SBenny Halevy goto out; 2040b85d4c01SBenny Halevy 2041868b89c3SMi Jinlong status = nfserr_too_many_ops; 2042868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 2043868b89c3SMi Jinlong goto out; 2044868b89c3SMi Jinlong 2045ae82a8d0SMi Jinlong status = nfserr_req_too_big; 2046ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 2047ae82a8d0SMi Jinlong goto out; 2048ae82a8d0SMi Jinlong 2049b85d4c01SBenny Halevy status = nfserr_badslot; 20506c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 2051b85d4c01SBenny Halevy goto out; 2052b85d4c01SBenny Halevy 2053557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 2054b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 2055b85d4c01SBenny Halevy 2056a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 2057a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 2058a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 2059a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 2060a8dfdaebSAndy Adamson 206173e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 206273e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 2063b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 2064bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 2065bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 2066bf5c43c8SJ. Bruce Fields goto out; 2067b85d4c01SBenny Halevy cstate->slot = slot; 2068b85d4c01SBenny Halevy cstate->session = session; 2069da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 2070557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 2071bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 2072da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2073aaf84eb9SBenny Halevy goto out; 2074b85d4c01SBenny Halevy } 2075b85d4c01SBenny Halevy if (status) 2076b85d4c01SBenny Halevy goto out; 2077b85d4c01SBenny Halevy 2078a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 2079a663bdd8SJ. Bruce Fields conn = NULL; 2080328ead28SJ. Bruce Fields 2081b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2082b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2083bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 208473e79482SJ. Bruce Fields if (seq->cachethis) 208573e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2086bf5c43c8SJ. Bruce Fields else 2087bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2088b85d4c01SBenny Halevy 2089b85d4c01SBenny Halevy cstate->slot = slot; 2090b85d4c01SBenny Halevy cstate->session = session; 2091b85d4c01SBenny Halevy 2092b85d4c01SBenny Halevy out: 209326c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 2094aaf84eb9SBenny Halevy if (cstate->session) { 20950d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 20960d7bb719SJ. Bruce Fields 209736acb66bSBenny Halevy nfsd4_get_session(cstate->session); 20980d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 20995423732aSBenny Halevy switch (clp->cl_cb_state) { 21005423732aSBenny Halevy case NFSD4_CB_DOWN: 2101fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 21025423732aSBenny Halevy break; 21035423732aSBenny Halevy case NFSD4_CB_FAULT: 2104fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 21055423732aSBenny Halevy break; 2106fc0c3dd1SBenny Halevy default: 2107fc0c3dd1SBenny Halevy seq->status_flags = 0; 21085423732aSBenny Halevy } 2109aaf84eb9SBenny Halevy } 2110a663bdd8SJ. Bruce Fields kfree(conn); 211136acb66bSBenny Halevy spin_unlock(&client_lock); 2112b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2113b85d4c01SBenny Halevy return status; 2114069b6ad4SAndy Adamson } 2115069b6ad4SAndy Adamson 2116345c2842SMi Jinlong __be32 2117345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2118345c2842SMi Jinlong { 2119345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 212057b7b43bSJ. Bruce Fields __be32 status = 0; 2121345c2842SMi Jinlong 2122345c2842SMi Jinlong nfs4_lock_state(); 2123d15c077eSJ. Bruce Fields unconf = find_unconfirmed_client(&dc->clientid, true); 2124d15c077eSJ. Bruce Fields conf = find_confirmed_client(&dc->clientid, true); 2125345c2842SMi Jinlong 2126345c2842SMi Jinlong if (conf) { 2127345c2842SMi Jinlong clp = conf; 2128345c2842SMi Jinlong 21296eccece9SJ. Bruce Fields if (!is_client_expired(conf) && client_has_state(conf)) { 2130345c2842SMi Jinlong status = nfserr_clientid_busy; 2131345c2842SMi Jinlong goto out; 2132345c2842SMi Jinlong } 2133345c2842SMi Jinlong 2134345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2135345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2136345c2842SMi Jinlong status = nfserr_clientid_busy; 2137345c2842SMi Jinlong goto out; 2138345c2842SMi Jinlong } 2139345c2842SMi Jinlong } else if (unconf) 2140345c2842SMi Jinlong clp = unconf; 2141345c2842SMi Jinlong else { 2142345c2842SMi Jinlong status = nfserr_stale_clientid; 2143345c2842SMi Jinlong goto out; 2144345c2842SMi Jinlong } 2145345c2842SMi Jinlong 2146345c2842SMi Jinlong expire_client(clp); 2147345c2842SMi Jinlong out: 2148345c2842SMi Jinlong nfs4_unlock_state(); 2149345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2150345c2842SMi Jinlong return status; 2151345c2842SMi Jinlong } 2152345c2842SMi Jinlong 2153069b6ad4SAndy Adamson __be32 21544dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 21554dc6ec00SJ. Bruce Fields { 215657b7b43bSJ. Bruce Fields __be32 status = 0; 2157bcecf1ccSMi Jinlong 21584dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 21594dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 21604dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 21614dc6ec00SJ. Bruce Fields /* 21624dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 21634dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 21644dc6ec00SJ. Bruce Fields */ 21654dc6ec00SJ. Bruce Fields return nfs_ok; 21664dc6ec00SJ. Bruce Fields } 2167bcecf1ccSMi Jinlong 21684dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2169bcecf1ccSMi Jinlong status = nfserr_complete_already; 2170a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2171a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2172bcecf1ccSMi Jinlong goto out; 2173bcecf1ccSMi Jinlong 2174bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2175bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 21764dc6ec00SJ. Bruce Fields /* 21774dc6ec00SJ. Bruce Fields * The following error isn't really legal. 21784dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 21794dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 21804dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 21814dc6ec00SJ. Bruce Fields * client. 21824dc6ec00SJ. Bruce Fields */ 2183bcecf1ccSMi Jinlong goto out; 2184bcecf1ccSMi Jinlong 2185bcecf1ccSMi Jinlong status = nfs_ok; 21862a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2187bcecf1ccSMi Jinlong out: 21884dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2189bcecf1ccSMi Jinlong return status; 21904dc6ec00SJ. Bruce Fields } 21914dc6ec00SJ. Bruce Fields 21924dc6ec00SJ. Bruce Fields __be32 2193b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2194b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 21951da177e4SLinus Torvalds { 2196a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 21971da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 21981da177e4SLinus Torvalds unsigned int strhashval; 219928ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2200b37ad28bSAl Viro __be32 status; 2201a55370a3SNeilBrown char dname[HEXDIR_LEN]; 22021da177e4SLinus Torvalds 2203a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2204a55370a3SNeilBrown if (status) 220573aea4ecSNeil Brown return status; 2206a55370a3SNeilBrown 2207a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 22081da177e4SLinus Torvalds 220963db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 22101da177e4SLinus Torvalds nfs4_lock_state(); 2211e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 221228ce6054SNeilBrown if (conf) { 221363db4632SJ. Bruce Fields /* case 0: */ 22141da177e4SLinus Torvalds status = nfserr_clid_inuse; 2215e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2216e203d506SJ. Bruce Fields goto out; 2217026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2218363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2219363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2220363168b4SJeff Layton sizeof(addr_str)); 2221026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2222363168b4SJeff Layton "at %s\n", addr_str); 22231da177e4SLinus Torvalds goto out; 22241da177e4SLinus Torvalds } 22251da177e4SLinus Torvalds } 2226e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 22271da177e4SLinus Torvalds if (unconf) 22281da177e4SLinus Torvalds expire_client(unconf); 22298f930711SJ. Bruce Fields status = nfserr_jukebox; 2230b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2231a55370a3SNeilBrown if (new == NULL) 22321da177e4SLinus Torvalds goto out; 223334b232bbSJ. Bruce Fields if (conf && same_verf(&conf->cl_verifier, &clverifier)) 223463db4632SJ. Bruce Fields /* case 1: probable callback update */ 22351da177e4SLinus Torvalds copy_clid(new, conf); 223634b232bbSJ. Bruce Fields else /* case 4 (new client) or cases 2, 3 (client reboot): */ 22371da177e4SLinus Torvalds gen_clid(new); 22388323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 22396f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2240c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 22411da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 22421da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 22431da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22441da177e4SLinus Torvalds status = nfs_ok; 22451da177e4SLinus Torvalds out: 22461da177e4SLinus Torvalds nfs4_unlock_state(); 22471da177e4SLinus Torvalds return status; 22481da177e4SLinus Torvalds } 22491da177e4SLinus Torvalds 22501da177e4SLinus Torvalds 2251b37ad28bSAl Viro __be32 2252b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2253b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2254b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22551da177e4SLinus Torvalds { 225621ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22571da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22581da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2259b37ad28bSAl Viro __be32 status; 22602c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 22611da177e4SLinus Torvalds 22622c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 22631da177e4SLinus Torvalds return nfserr_stale_clientid; 22641da177e4SLinus Torvalds nfs4_lock_state(); 226521ab45a4SNeilBrown 2266d15c077eSJ. Bruce Fields conf = find_confirmed_client(clid, false); 2267d15c077eSJ. Bruce Fields unconf = find_unconfirmed_client(clid, false); 2268a186e767SJ. Bruce Fields /* 22698695b90aSJ. Bruce Fields * We try hard to give out unique clientid's, so if we get an 22708695b90aSJ. Bruce Fields * attempt to confirm the same clientid with a different cred, 22718695b90aSJ. Bruce Fields * there's a bug somewhere. Let's charitably assume it's our 22728695b90aSJ. Bruce Fields * bug. 2273a186e767SJ. Bruce Fields */ 22748695b90aSJ. Bruce Fields status = nfserr_serverfault; 22758695b90aSJ. Bruce Fields if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) 22768695b90aSJ. Bruce Fields goto out; 22778695b90aSJ. Bruce Fields if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22788695b90aSJ. Bruce Fields goto out; 227963db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 228090d700b7SJ. Bruce Fields if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { 228190d700b7SJ. Bruce Fields if (conf && !unconf) /* case 2: probable retransmit */ 228290d700b7SJ. Bruce Fields status = nfs_ok; 228390d700b7SJ. Bruce Fields else /* case 4: client hasn't noticed we rebooted yet? */ 228490d700b7SJ. Bruce Fields status = nfserr_stale_clientid; 228590d700b7SJ. Bruce Fields goto out; 228690d700b7SJ. Bruce Fields } 228790d700b7SJ. Bruce Fields status = nfs_ok; 228890d700b7SJ. Bruce Fields if (conf) { /* case 1: callback update */ 22895a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22905a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22911a69c179SNeilBrown expire_client(unconf); 229290d700b7SJ. Bruce Fields } else { /* case 3: normal case; new or rebooted client */ 22938695b90aSJ. Bruce Fields unsigned int hash = clientstr_hashval(unconf->cl_recdir); 22941a69c179SNeilBrown 22958695b90aSJ. Bruce Fields conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); 22960d22f68fSJ. Bruce Fields if (conf) 22971a69c179SNeilBrown expire_client(conf); 22981da177e4SLinus Torvalds move_to_confirmed(unconf); 2299f3d03b92SJ. Bruce Fields nfsd4_probe_callback(unconf); 230008e8987cSNeilBrown } 23011da177e4SLinus Torvalds out: 23021da177e4SLinus Torvalds nfs4_unlock_state(); 23031da177e4SLinus Torvalds return status; 23041da177e4SLinus Torvalds } 23051da177e4SLinus Torvalds 230632513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 23071da177e4SLinus Torvalds { 230832513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 230932513b40SJ. Bruce Fields } 231032513b40SJ. Bruce Fields 231132513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 231232513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 231332513b40SJ. Bruce Fields { 23141da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23151da177e4SLinus Torvalds 23168b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 23171da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 23188beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 23198beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 23201da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 232147f9940cSMeelap Shah fp->fi_had_conflict = false; 2322acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2323f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2324f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 232547cee541SPavel Emelyanov spin_lock(&recall_lock); 232647cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 232747cee541SPavel Emelyanov spin_unlock(&recall_lock); 23281da177e4SLinus Torvalds } 23291da177e4SLinus Torvalds 23301da177e4SLinus Torvalds static void 2331e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2332e60d4398SNeilBrown { 2333e60d4398SNeilBrown if (*slab == NULL) 2334e60d4398SNeilBrown return; 23351a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2336e60d4398SNeilBrown *slab = NULL; 2337e60d4398SNeilBrown } 2338e60d4398SNeilBrown 2339e8ff2a84SJ. Bruce Fields void 2340e60d4398SNeilBrown nfsd4_free_slabs(void) 2341e60d4398SNeilBrown { 2342fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2343fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2344e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23455ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23465b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2347e60d4398SNeilBrown } 23481da177e4SLinus Torvalds 234972083396SBryan Schumaker int 23501da177e4SLinus Torvalds nfsd4_init_slabs(void) 23511da177e4SLinus Torvalds { 2352fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2353fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2354fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2355fe0750e5SJ. Bruce Fields goto out_nomem; 2356fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 23573c40794bSYanchuan Nian sizeof(struct nfs4_lockowner), 0, 0, NULL); 2358fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2359e60d4398SNeilBrown goto out_nomem; 2360e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 236120c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2362e60d4398SNeilBrown if (file_slab == NULL) 2363e60d4398SNeilBrown goto out_nomem; 23645ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2365dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23665ac049acSNeilBrown if (stateid_slab == NULL) 23675ac049acSNeilBrown goto out_nomem; 23685b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 236920c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23705b2d21c1SNeilBrown if (deleg_slab == NULL) 23715b2d21c1SNeilBrown goto out_nomem; 2372e60d4398SNeilBrown return 0; 2373e60d4398SNeilBrown out_nomem: 2374e60d4398SNeilBrown nfsd4_free_slabs(); 23751da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23761da177e4SLinus Torvalds return -ENOMEM; 23771da177e4SLinus Torvalds } 23781da177e4SLinus Torvalds 2379fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23801da177e4SLinus Torvalds { 2381fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2382fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2383fe0750e5SJ. Bruce Fields } 2384fe0750e5SJ. Bruce Fields 2385fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2386fe0750e5SJ. Bruce Fields { 2387fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2388fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23891da177e4SLinus Torvalds } 23901da177e4SLinus Torvalds 2391ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2392ff194bd9SJ. Bruce Fields { 2393ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2394ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2395ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2396ff194bd9SJ. Bruce Fields } 2397ff194bd9SJ. Bruce Fields 2398fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 23991da177e4SLinus Torvalds { 24001da177e4SLinus Torvalds struct nfs4_stateowner *sop; 24011da177e4SLinus Torvalds 2402fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2403ff194bd9SJ. Bruce Fields if (!sop) 2404ff194bd9SJ. Bruce Fields return NULL; 2405ff194bd9SJ. Bruce Fields 2406ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2407ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2408fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2409ff194bd9SJ. Bruce Fields return NULL; 2410ff194bd9SJ. Bruce Fields } 24111da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2412ff194bd9SJ. Bruce Fields 2413ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2414ff194bd9SJ. Bruce Fields sop->so_client = clp; 2415ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 24161da177e4SLinus Torvalds return sop; 24171da177e4SLinus Torvalds } 2418ff194bd9SJ. Bruce Fields 2419fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2420ff194bd9SJ. Bruce Fields { 242116bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2422fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 24231da177e4SLinus Torvalds } 24241da177e4SLinus Torvalds 2425fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24261da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2427fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 24281da177e4SLinus Torvalds 2429fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2430fe0750e5SJ. Bruce Fields if (!oo) 24311da177e4SLinus Torvalds return NULL; 2432fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2433fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2434d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2435fe0750e5SJ. Bruce Fields oo->oo_time = 0; 243638c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2437fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2438fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2439fe0750e5SJ. Bruce Fields return oo; 24401da177e4SLinus Torvalds } 24411da177e4SLinus Torvalds 2442996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2443fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2444d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24451da177e4SLinus Torvalds 2446996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2447ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2448fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24498beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2450fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 245113cd2184SNeilBrown get_nfs4_file(fp); 24521da177e4SLinus Torvalds stp->st_file = fp; 24531da177e4SLinus Torvalds stp->st_access_bmap = 0; 24541da177e4SLinus Torvalds stp->st_deny_bmap = 0; 245582c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2456ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 24574c4cd222SNeilBrown stp->st_openstp = NULL; 24581da177e4SLinus Torvalds } 24591da177e4SLinus Torvalds 24601da177e4SLinus Torvalds static void 2461fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24621da177e4SLinus Torvalds { 2463fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24641da177e4SLinus Torvalds 2465fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2466fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24671da177e4SLinus Torvalds } 24681da177e4SLinus Torvalds 24691da177e4SLinus Torvalds static int 2470599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2471599e0a22SJ. Bruce Fields clientid_t *clid) 2472599e0a22SJ. Bruce Fields { 2473599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2474599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2475599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24761da177e4SLinus Torvalds } 24771da177e4SLinus Torvalds 2478fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 2479d15c077eSJ. Bruce Fields find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, bool sessions) 24801da177e4SLinus Torvalds { 2481a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2482a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 2483d15c077eSJ. Bruce Fields struct nfs4_client *clp; 24841da177e4SLinus Torvalds 248516bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 248616bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 248716bfdaafSJ. Bruce Fields continue; 2488a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2489a50d2ad1SJ. Bruce Fields oo = openowner(so); 2490d15c077eSJ. Bruce Fields clp = oo->oo_owner.so_client; 2491d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 2492d15c077eSJ. Bruce Fields return NULL; 2493a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2494a50d2ad1SJ. Bruce Fields return oo; 2495a50d2ad1SJ. Bruce Fields } 24961da177e4SLinus Torvalds } 24971da177e4SLinus Torvalds return NULL; 24981da177e4SLinus Torvalds } 24991da177e4SLinus Torvalds 25001da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 25011da177e4SLinus Torvalds static struct nfs4_file * 25021da177e4SLinus Torvalds find_file(struct inode *ino) 25031da177e4SLinus Torvalds { 25041da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 25051da177e4SLinus Torvalds struct nfs4_file *fp; 25061da177e4SLinus Torvalds 25078b671b80SJ. Bruce Fields spin_lock(&recall_lock); 25081da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 250913cd2184SNeilBrown if (fp->fi_inode == ino) { 251013cd2184SNeilBrown get_nfs4_file(fp); 25118b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25121da177e4SLinus Torvalds return fp; 25131da177e4SLinus Torvalds } 251413cd2184SNeilBrown } 25158b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25161da177e4SLinus Torvalds return NULL; 25171da177e4SLinus Torvalds } 25181da177e4SLinus Torvalds 25194f83aa30SJ. Bruce Fields /* 25201da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 25211da177e4SLinus Torvalds * WRITE with all zero or all one stateid 25221da177e4SLinus Torvalds */ 2523b37ad28bSAl Viro static __be32 25241da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 25251da177e4SLinus Torvalds { 25261da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25271da177e4SLinus Torvalds struct nfs4_file *fp; 2528dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2529b37ad28bSAl Viro __be32 ret; 25301da177e4SLinus Torvalds 25311da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 25321da177e4SLinus Torvalds 25331da177e4SLinus Torvalds fp = find_file(ino); 253413cd2184SNeilBrown if (!fp) 253513cd2184SNeilBrown return nfs_ok; 2536b700949bSNeilBrown ret = nfserr_locked; 25371da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25388beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2539ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2540ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 254113cd2184SNeilBrown goto out; 25421da177e4SLinus Torvalds } 254313cd2184SNeilBrown ret = nfs_ok; 254413cd2184SNeilBrown out: 254513cd2184SNeilBrown put_nfs4_file(fp); 254613cd2184SNeilBrown return ret; 25471da177e4SLinus Torvalds } 25481da177e4SLinus Torvalds 25496b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25501da177e4SLinus Torvalds { 25511da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25521da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25531da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25541da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25551da177e4SLinus Torvalds * it's safe to take a reference: */ 25561da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25571da177e4SLinus Torvalds 25581da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25591da177e4SLinus Torvalds 2560460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25611da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25621da177e4SLinus Torvalds 25636b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25646b57d9c8SJ. Bruce Fields } 25656b57d9c8SJ. Bruce Fields 2566acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25676b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25686b57d9c8SJ. Bruce Fields { 2569acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2570acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25716b57d9c8SJ. Bruce Fields 25727fa10cd1SJ. Bruce Fields if (!fp) { 25737fa10cd1SJ. Bruce Fields WARN(1, "(%p)->fl_owner NULL\n", fl); 25747fa10cd1SJ. Bruce Fields return; 25757fa10cd1SJ. Bruce Fields } 25767fa10cd1SJ. Bruce Fields if (fp->fi_had_conflict) { 25777fa10cd1SJ. Bruce Fields WARN(1, "duplicate break on %p\n", fp); 25787fa10cd1SJ. Bruce Fields return; 25797fa10cd1SJ. Bruce Fields } 25800272e1fdSJ. Bruce Fields /* 25810272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2582acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25836b57d9c8SJ. Bruce Fields * in time: 25840272e1fdSJ. Bruce Fields */ 25850272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25861da177e4SLinus Torvalds 25875d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2588acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2589acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25905d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 25915d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 25921da177e4SLinus Torvalds } 25931da177e4SLinus Torvalds 25941da177e4SLinus Torvalds static 25951da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 25961da177e4SLinus Torvalds { 25971da177e4SLinus Torvalds if (arg & F_UNLCK) 25981da177e4SLinus Torvalds return lease_modify(onlist, arg); 25991da177e4SLinus Torvalds else 26001da177e4SLinus Torvalds return -EAGAIN; 26011da177e4SLinus Torvalds } 26021da177e4SLinus Torvalds 26037b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 26048fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 26058fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 26061da177e4SLinus Torvalds }; 26071da177e4SLinus Torvalds 26087a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 26097a8711c9SJ. Bruce Fields { 26107a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 26117a8711c9SJ. Bruce Fields return nfs_ok; 26127a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 26137a8711c9SJ. Bruce Fields return nfserr_replay_me; 26147a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 26157a8711c9SJ. Bruce Fields return nfs_ok; 26167a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 26177a8711c9SJ. Bruce Fields } 26181da177e4SLinus Torvalds 2619b37ad28bSAl Viro __be32 26206668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 26216668958fSAndy Adamson struct nfsd4_open *open) 26221da177e4SLinus Torvalds { 26231da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 26241da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 26251da177e4SLinus Torvalds unsigned int strhashval; 2626fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 26274cdc951bSJ. Bruce Fields __be32 status; 26282c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 26291da177e4SLinus Torvalds 26302c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&open->op_clientid, nn)) 26311da177e4SLinus Torvalds return nfserr_stale_clientid; 263232513b40SJ. Bruce Fields /* 263332513b40SJ. Bruce Fields * In case we need it later, after we've already created the 263432513b40SJ. Bruce Fields * file and don't want to risk a further failure: 263532513b40SJ. Bruce Fields */ 263632513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 263732513b40SJ. Bruce Fields if (open->op_file == NULL) 263832513b40SJ. Bruce Fields return nfserr_jukebox; 26391da177e4SLinus Torvalds 264016bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2641d15c077eSJ. Bruce Fields oo = find_openstateowner_str(strhashval, open, cstate->minorversion); 2642fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2643fe0750e5SJ. Bruce Fields if (!oo) { 2644d15c077eSJ. Bruce Fields clp = find_confirmed_client(clientid, cstate->minorversion); 26450f442aa2SJ. Bruce Fields if (clp == NULL) 26460f442aa2SJ. Bruce Fields return nfserr_expired; 2647bcf130f9SJ. Bruce Fields goto new_owner; 26480f442aa2SJ. Bruce Fields } 2649dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26500f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2651fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2652fe0750e5SJ. Bruce Fields release_openowner(oo); 2653fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2654bcf130f9SJ. Bruce Fields goto new_owner; 26550f442aa2SJ. Bruce Fields } 26564cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26574cdc951bSJ. Bruce Fields if (status) 26584cdc951bSJ. Bruce Fields return status; 26594cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26604cdc951bSJ. Bruce Fields goto alloc_stateid; 2661bcf130f9SJ. Bruce Fields new_owner: 2662fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2663fe0750e5SJ. Bruce Fields if (oo == NULL) 26643e772463SJ. Bruce Fields return nfserr_jukebox; 2665fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26664cdc951bSJ. Bruce Fields alloc_stateid: 26674cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26684cdc951bSJ. Bruce Fields if (!open->op_stp) 26694cdc951bSJ. Bruce Fields return nfserr_jukebox; 26700f442aa2SJ. Bruce Fields return nfs_ok; 26711da177e4SLinus Torvalds } 26721da177e4SLinus Torvalds 2673b37ad28bSAl Viro static inline __be32 26744a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26754a6e43e6SNeilBrown { 26764a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26774a6e43e6SNeilBrown return nfserr_openmode; 26784a6e43e6SNeilBrown else 26794a6e43e6SNeilBrown return nfs_ok; 26804a6e43e6SNeilBrown } 26814a6e43e6SNeilBrown 2682c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 268324a0111eSJ. Bruce Fields { 268424a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 268524a0111eSJ. Bruce Fields } 268624a0111eSJ. Bruce Fields 268738c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2688f459e453SJ. Bruce Fields { 2689f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2690f459e453SJ. Bruce Fields 269138c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2692f459e453SJ. Bruce Fields if (!ret) 2693f459e453SJ. Bruce Fields return NULL; 2694f459e453SJ. Bruce Fields return delegstateid(ret); 2695f459e453SJ. Bruce Fields } 2696f459e453SJ. Bruce Fields 26978b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26988b289b2cSJ. Bruce Fields { 26998b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 27008b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 27018b289b2cSJ. Bruce Fields } 27028b289b2cSJ. Bruce Fields 2703b37ad28bSAl Viro static __be32 270438c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2705567d9829SNeilBrown struct nfs4_delegation **dp) 2706567d9829SNeilBrown { 2707567d9829SNeilBrown int flags; 2708b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2709567d9829SNeilBrown 271038c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2711567d9829SNeilBrown if (*dp == NULL) 2712c44c5eebSNeilBrown goto out; 271324a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2714567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2715567d9829SNeilBrown if (status) 2716567d9829SNeilBrown *dp = NULL; 2717c44c5eebSNeilBrown out: 27188b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2719c44c5eebSNeilBrown return nfs_ok; 2720c44c5eebSNeilBrown if (status) 2721c44c5eebSNeilBrown return status; 2722dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2723c44c5eebSNeilBrown return nfs_ok; 2724567d9829SNeilBrown } 2725567d9829SNeilBrown 2726b37ad28bSAl Viro static __be32 2727dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 27281da177e4SLinus Torvalds { 2729dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2730fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 27311da177e4SLinus Torvalds 27328beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 27331da177e4SLinus Torvalds /* ignore lock owners */ 27341da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 27351da177e4SLinus Torvalds continue; 27361da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2737fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 27381da177e4SLinus Torvalds *stpp = local; 27391da177e4SLinus Torvalds /* check for conflicting share reservations */ 27401da177e4SLinus Torvalds if (!test_share(local, open)) 274177eaae8dSJ. Bruce Fields return nfserr_share_denied; 27421da177e4SLinus Torvalds } 274377eaae8dSJ. Bruce Fields return nfs_ok; 27441da177e4SLinus Torvalds } 27451da177e4SLinus Torvalds 274621fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 274721fb4016SJ. Bruce Fields { 274821fb4016SJ. Bruce Fields int flags = 0; 274921fb4016SJ. Bruce Fields 275021fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 275121fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 275221fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 275321fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 275421fb4016SJ. Bruce Fields return flags; 275521fb4016SJ. Bruce Fields } 275621fb4016SJ. Bruce Fields 27570c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27580c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2759f9d7562fSJ. Bruce Fields { 2760f9d7562fSJ. Bruce Fields __be32 status; 27610c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27620c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27630c12eaffSCasey Bodley 2764f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2765f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2766f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2767f9d7562fSJ. Bruce Fields if (status) 2768f9d7562fSJ. Bruce Fields return status; 2769f9d7562fSJ. Bruce Fields } 2770f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2771f9d7562fSJ. Bruce Fields 2772f9d7562fSJ. Bruce Fields return nfs_ok; 2773f9d7562fSJ. Bruce Fields } 2774f9d7562fSJ. Bruce Fields 2775b37ad28bSAl Viro static inline __be32 27761da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27771da177e4SLinus Torvalds struct nfsd4_open *open) 27781da177e4SLinus Torvalds { 27791da177e4SLinus Torvalds struct iattr iattr = { 27801da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27811da177e4SLinus Torvalds .ia_size = 0, 27821da177e4SLinus Torvalds }; 27831da177e4SLinus Torvalds if (!open->op_truncate) 27841da177e4SLinus Torvalds return 0; 27851da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27869246585aSAl Viro return nfserr_inval; 27871da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27881da177e4SLinus Torvalds } 27891da177e4SLinus Torvalds 2790b37ad28bSAl Viro static __be32 2791dcef0413SJ. 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) 27921da177e4SLinus Torvalds { 2793b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27947d947842SJ. Bruce Fields bool new_access; 2795b37ad28bSAl Viro __be32 status; 27961da177e4SLinus Torvalds 279782c5ff1bSJeff Layton new_access = !test_access(op_share_access, stp); 2798f9d7562fSJ. Bruce Fields if (new_access) { 27990c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2800f9d7562fSJ. Bruce Fields if (status) 2801f9d7562fSJ. Bruce Fields return status; 28026c26d08fSJ. Bruce Fields } 28031da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 28041da177e4SLinus Torvalds if (status) { 2805f9d7562fSJ. Bruce Fields if (new_access) { 2806f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2807f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2808f9d7562fSJ. Bruce Fields } 28091da177e4SLinus Torvalds return status; 28101da177e4SLinus Torvalds } 28111da177e4SLinus Torvalds /* remember the open */ 281282c5ff1bSJeff Layton set_access(op_share_access, stp); 2813ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 28141da177e4SLinus Torvalds 28151da177e4SLinus Torvalds return nfs_ok; 28161da177e4SLinus Torvalds } 28171da177e4SLinus Torvalds 28181da177e4SLinus Torvalds 28191da177e4SLinus Torvalds static void 28201255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 28211da177e4SLinus Torvalds { 2822dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 28231da177e4SLinus Torvalds } 28241da177e4SLinus Torvalds 282514a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 282614a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 282714a24e99SJ. Bruce Fields { 282814a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 282914a24e99SJ. Bruce Fields return true; 283014a24e99SJ. Bruce Fields /* 283114a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 283214a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 283314a24e99SJ. Bruce Fields * until we hear otherwise: 283414a24e99SJ. Bruce Fields */ 283514a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 283614a24e99SJ. Bruce Fields } 283714a24e99SJ. Bruce Fields 283822d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 283922d38c4cSJ. Bruce Fields { 284022d38c4cSJ. Bruce Fields struct file_lock *fl; 284122d38c4cSJ. Bruce Fields 284222d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 284322d38c4cSJ. Bruce Fields if (!fl) 284422d38c4cSJ. Bruce Fields return NULL; 284522d38c4cSJ. Bruce Fields locks_init_lock(fl); 284622d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 284722d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 284822d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 284922d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2850acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 285122d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 285222d38c4cSJ. Bruce Fields return fl; 285322d38c4cSJ. Bruce Fields } 285422d38c4cSJ. Bruce Fields 2855edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2856edab9782SJ. Bruce Fields { 2857acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2858edab9782SJ. Bruce Fields struct file_lock *fl; 2859edab9782SJ. Bruce Fields int status; 2860edab9782SJ. Bruce Fields 2861edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2862edab9782SJ. Bruce Fields if (!fl) 2863edab9782SJ. Bruce Fields return -ENOMEM; 2864acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28652a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2866acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2867edab9782SJ. Bruce Fields if (status) { 2868acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2869edab9782SJ. Bruce Fields locks_free_lock(fl); 2870edab9782SJ. Bruce Fields return -ENOMEM; 2871edab9782SJ. Bruce Fields } 2872acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2873cb0942b8SAl Viro fp->fi_deleg_file = get_file(fl->fl_file); 2874acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2875acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2876acfdf5c3SJ. Bruce Fields return 0; 2877acfdf5c3SJ. Bruce Fields } 2878acfdf5c3SJ. Bruce Fields 2879acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2880acfdf5c3SJ. Bruce Fields { 2881acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2882acfdf5c3SJ. Bruce Fields 2883acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2884acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2885acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2886acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2887acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2888acfdf5c3SJ. Bruce Fields return -EAGAIN; 2889acfdf5c3SJ. Bruce Fields } 2890acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2891acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2892acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28932a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2894edab9782SJ. Bruce Fields return 0; 2895edab9782SJ. Bruce Fields } 2896edab9782SJ. Bruce Fields 28974aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 28984aa8913cSBenny Halevy { 28994aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 29004aa8913cSBenny Halevy if (status == -EAGAIN) 29014aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 29024aa8913cSBenny Halevy else { 29034aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 29044aa8913cSBenny Halevy switch (open->op_deleg_want) { 29054aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 29064aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 29074aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 29084aa8913cSBenny Halevy break; 29094aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 29104aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 29114aa8913cSBenny Halevy break; 29124aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 29134aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 29144aa8913cSBenny Halevy } 29154aa8913cSBenny Halevy } 29164aa8913cSBenny Halevy } 29174aa8913cSBenny Halevy 29181da177e4SLinus Torvalds /* 29191da177e4SLinus Torvalds * Attempt to hand out a delegation. 29201da177e4SLinus Torvalds */ 29211da177e4SLinus Torvalds static void 29225ccb0066SStanislav Kinsbursky nfs4_open_delegation(struct net *net, struct svc_fh *fh, 29235ccb0066SStanislav Kinsbursky struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 29241da177e4SLinus Torvalds { 29251da177e4SLinus Torvalds struct nfs4_delegation *dp; 2926fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 292714a24e99SJ. Bruce Fields int cb_up; 2928d24433cdSBenny Halevy int status = 0, flag = 0; 29291da177e4SLinus Torvalds 2930fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 29311da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 29327b190fecSNeilBrown open->op_recall = 0; 29337b190fecSNeilBrown switch (open->op_claim_type) { 29347b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29352bf23875SJ. Bruce Fields if (!cb_up) 29367b190fecSNeilBrown open->op_recall = 1; 29377b190fecSNeilBrown flag = open->op_delegate_type; 29387b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29391da177e4SLinus Torvalds goto out; 29407b190fecSNeilBrown break; 29417b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29427b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29437b190fecSNeilBrown * had the chance to reclaim theirs.... */ 29445ccb0066SStanislav Kinsbursky if (locks_in_grace(net)) 29457b190fecSNeilBrown goto out; 2946dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29477b190fecSNeilBrown goto out; 29481da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29491da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29501da177e4SLinus Torvalds else 29511da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29527b190fecSNeilBrown break; 29537b190fecSNeilBrown default: 29547b190fecSNeilBrown goto out; 29557b190fecSNeilBrown } 29561da177e4SLinus Torvalds 2957fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2958dd239cc0SJ. Bruce Fields if (dp == NULL) 2959dd239cc0SJ. Bruce Fields goto out_no_deleg; 2960acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2961edab9782SJ. Bruce Fields if (status) 2962dd239cc0SJ. Bruce Fields goto out_free; 29631da177e4SLinus Torvalds 2964d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29651da177e4SLinus Torvalds 29668c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2967d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29681da177e4SLinus Torvalds out: 29691da177e4SLinus Torvalds open->op_delegate_type = flag; 2970d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2971d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2972d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2973d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2974d24433cdSBenny Halevy 29754aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29764aa8913cSBenny Halevy if (open->op_deleg_want) 29774aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2978d24433cdSBenny Halevy } 2979dd239cc0SJ. Bruce Fields return; 2980dd239cc0SJ. Bruce Fields out_free: 2981acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2982dd239cc0SJ. Bruce Fields out_no_deleg: 2983dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2984dd239cc0SJ. Bruce Fields goto out; 29851da177e4SLinus Torvalds } 29861da177e4SLinus Torvalds 2987e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 2988e27f49c3SBenny Halevy struct nfs4_delegation *dp) 2989e27f49c3SBenny Halevy { 2990e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 2991e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2992e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2993e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 2994e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 2995e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2996e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2997e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 2998e27f49c3SBenny Halevy } 2999e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 3000e27f49c3SBenny Halevy * it already has, therefore we don't return 3001e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 3002e27f49c3SBenny Halevy */ 3003e27f49c3SBenny Halevy } 3004e27f49c3SBenny Halevy 30051da177e4SLinus Torvalds /* 30061da177e4SLinus Torvalds * called with nfs4_lock_state() held. 30071da177e4SLinus Torvalds */ 3008b37ad28bSAl Viro __be32 30091da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 30101da177e4SLinus Torvalds { 30116668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 301238c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 30131da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 30141da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3015dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 3016567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 3017b37ad28bSAl Viro __be32 status; 30181da177e4SLinus Torvalds 30191da177e4SLinus Torvalds /* 30201da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 30211da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 30221da177e4SLinus Torvalds * If not found, create the nfs4_file struct 30231da177e4SLinus Torvalds */ 30241da177e4SLinus Torvalds fp = find_file(ino); 30251da177e4SLinus Torvalds if (fp) { 30261da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 30271da177e4SLinus Torvalds goto out; 302838c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 3029c44c5eebSNeilBrown if (status) 3030c44c5eebSNeilBrown goto out; 30311da177e4SLinus Torvalds } else { 3032c44c5eebSNeilBrown status = nfserr_bad_stateid; 30338b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3034c44c5eebSNeilBrown goto out; 30353e772463SJ. Bruce Fields status = nfserr_jukebox; 303632513b40SJ. Bruce Fields fp = open->op_file; 303732513b40SJ. Bruce Fields open->op_file = NULL; 303832513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30391da177e4SLinus Torvalds } 30401da177e4SLinus Torvalds 30411da177e4SLinus Torvalds /* 30421da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30431da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30441da177e4SLinus Torvalds */ 30451da177e4SLinus Torvalds if (stp) { 30461da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3047f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30481da177e4SLinus Torvalds if (status) 30491da177e4SLinus Torvalds goto out; 30501da177e4SLinus Torvalds } else { 30514cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3052567d9829SNeilBrown if (status) 30531da177e4SLinus Torvalds goto out; 30544af82504SJ. Bruce Fields status = nfsd4_truncate(rqstp, current_fh, open); 30554af82504SJ. Bruce Fields if (status) 30564af82504SJ. Bruce Fields goto out; 30574cdc951bSJ. Bruce Fields stp = open->op_stp; 30584cdc951bSJ. Bruce Fields open->op_stp = NULL; 3059996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30601da177e4SLinus Torvalds } 3061dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3062dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30631da177e4SLinus Torvalds 3064d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3065dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30666668958fSAndy Adamson 3067d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3068d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3069d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3070d24433cdSBenny Halevy goto nodeleg; 3071d24433cdSBenny Halevy } 3072d24433cdSBenny Halevy } 3073d24433cdSBenny Halevy 30741da177e4SLinus Torvalds /* 30751da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30761da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30771da177e4SLinus Torvalds */ 30785ccb0066SStanislav Kinsbursky nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); 3079d24433cdSBenny Halevy nodeleg: 30801da177e4SLinus Torvalds status = nfs_ok; 30811da177e4SLinus Torvalds 30828c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3083dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30841da177e4SLinus Torvalds out: 3085d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3086d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3087e27f49c3SBenny Halevy open->op_deleg_want) 3088e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3089d24433cdSBenny Halevy 309013cd2184SNeilBrown if (fp) 309113cd2184SNeilBrown put_nfs4_file(fp); 309237515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 30931255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 30941da177e4SLinus Torvalds /* 30951da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 30961da177e4SLinus Torvalds */ 30971da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3098dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 30996668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 31001da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 31011da177e4SLinus Torvalds 31021da177e4SLinus Torvalds return status; 31031da177e4SLinus Torvalds } 31041da177e4SLinus Torvalds 3105d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3106d29b20cdSJ. Bruce Fields { 3107d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3108d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3109d29b20cdSJ. Bruce Fields 3110d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3111d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3112d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3113d29b20cdSJ. Bruce Fields if (status) { 3114d29b20cdSJ. Bruce Fields release_openowner(oo); 3115d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3116d29b20cdSJ. Bruce Fields } else 3117d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3118d29b20cdSJ. Bruce Fields } 3119d29b20cdSJ. Bruce Fields } 312032513b40SJ. Bruce Fields if (open->op_file) 312132513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 31224cdc951bSJ. Bruce Fields if (open->op_stp) 3123ef79859eSJ. Bruce Fields free_generic_stateid(open->op_stp); 3124d29b20cdSJ. Bruce Fields } 3125d29b20cdSJ. Bruce Fields 3126b37ad28bSAl Viro __be32 3127b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3128b591480bSJ.Bruce Fields clientid_t *clid) 31291da177e4SLinus Torvalds { 31301da177e4SLinus Torvalds struct nfs4_client *clp; 3131b37ad28bSAl Viro __be32 status; 31322c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 31331da177e4SLinus Torvalds 31341da177e4SLinus Torvalds nfs4_lock_state(); 31351da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31361da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31371da177e4SLinus Torvalds status = nfserr_stale_clientid; 31382c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 31391da177e4SLinus Torvalds goto out; 3140d15c077eSJ. Bruce Fields clp = find_confirmed_client(clid, cstate->minorversion); 31411da177e4SLinus Torvalds status = nfserr_expired; 31421da177e4SLinus Torvalds if (clp == NULL) { 31431da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31441da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31451da177e4SLinus Torvalds goto out; 31461da177e4SLinus Torvalds } 31471da177e4SLinus Torvalds status = nfserr_cb_path_down; 3148ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 314977a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31501da177e4SLinus Torvalds goto out; 31511da177e4SLinus Torvalds status = nfs_ok; 31521da177e4SLinus Torvalds out: 31531da177e4SLinus Torvalds nfs4_unlock_state(); 31541da177e4SLinus Torvalds return status; 31551da177e4SLinus Torvalds } 31561da177e4SLinus Torvalds 3157a76b4319SNeilBrown static void 31585e1533c7SStanislav Kinsbursky nfsd4_end_grace(struct net *net) 3159a76b4319SNeilBrown { 31605e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 31615e1533c7SStanislav Kinsbursky 316233dcc481SJeff Layton /* do nothing if grace period already ended */ 3163a51c84edSStanislav Kinsbursky if (nn->grace_ended) 316433dcc481SJeff Layton return; 316533dcc481SJeff Layton 3166a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 3167a51c84edSStanislav Kinsbursky nn->grace_ended = true; 31682c142baaSStanislav Kinsbursky nfsd4_record_grace_done(net, nn->boot_time); 31695e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 3170e46b498cSJ. Bruce Fields /* 3171e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3172e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3173e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3174e46b498cSJ. Bruce Fields */ 3175e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3176a76b4319SNeilBrown } 3177a76b4319SNeilBrown 3178fd39ca9aSNeilBrown static time_t 31791da177e4SLinus Torvalds nfs4_laundromat(void) 31801da177e4SLinus Torvalds { 31811da177e4SLinus Torvalds struct nfs4_client *clp; 3182fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31831da177e4SLinus Torvalds struct nfs4_delegation *dp; 31841da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3185cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3186cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3187cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 31881da177e4SLinus Torvalds 31891da177e4SLinus Torvalds nfs4_lock_state(); 31901da177e4SLinus Torvalds 31911da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 31925e1533c7SStanislav Kinsbursky nfsd4_end_grace(&init_net); 319336acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 319436acb66bSBenny Halevy spin_lock(&client_lock); 31951da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 31961da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 31971da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 31981da177e4SLinus Torvalds t = clp->cl_time - cutoff; 31991da177e4SLinus Torvalds if (clientid_val > t) 32001da177e4SLinus Torvalds clientid_val = t; 32011da177e4SLinus Torvalds break; 32021da177e4SLinus Torvalds } 3203d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3204d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3205d7682988SBenny Halevy clp->cl_clientid.cl_id); 3206d7682988SBenny Halevy continue; 3207d7682988SBenny Halevy } 3208d7682988SBenny Halevy unhash_client_locked(clp); 3209d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 321036acb66bSBenny Halevy } 321136acb66bSBenny Halevy spin_unlock(&client_lock); 321236acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 321336acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 32141da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 32151da177e4SLinus Torvalds clp->cl_clientid.cl_id); 32161da177e4SLinus Torvalds expire_client(clp); 32171da177e4SLinus Torvalds } 32181da177e4SLinus Torvalds spin_lock(&recall_lock); 32191da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32201da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32211da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 32221da177e4SLinus Torvalds u = dp->dl_time - cutoff; 32231da177e4SLinus Torvalds if (test_val > u) 32241da177e4SLinus Torvalds test_val = u; 32251da177e4SLinus Torvalds break; 32261da177e4SLinus Torvalds } 32271da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32281da177e4SLinus Torvalds } 32291da177e4SLinus Torvalds spin_unlock(&recall_lock); 32301da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32311da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32321da177e4SLinus Torvalds unhash_delegation(dp); 32331da177e4SLinus Torvalds } 3234cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32351da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3236fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3237fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3238fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32391da177e4SLinus Torvalds if (test_val > u) 32401da177e4SLinus Torvalds test_val = u; 32411da177e4SLinus Torvalds break; 32421da177e4SLinus Torvalds } 3243fe0750e5SJ. Bruce Fields release_openowner(oo); 32441da177e4SLinus Torvalds } 32451da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32461da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32471da177e4SLinus Torvalds nfs4_unlock_state(); 32481da177e4SLinus Torvalds return clientid_val; 32491da177e4SLinus Torvalds } 32501da177e4SLinus Torvalds 3251a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3252a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3253a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3254a254b246SHarvey Harrison 3255a254b246SHarvey Harrison static void 3256c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32571da177e4SLinus Torvalds { 32581da177e4SLinus Torvalds time_t t; 32591da177e4SLinus Torvalds 32601da177e4SLinus Torvalds t = nfs4_laundromat(); 32611da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 326258da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32631da177e4SLinus Torvalds } 32641da177e4SLinus Torvalds 3265f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3266f8816512SNeilBrown { 3267f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3268f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3269f7a4d872SJ. Bruce Fields return nfs_ok; 32701da177e4SLinus Torvalds } 32711da177e4SLinus Torvalds 32721da177e4SLinus Torvalds static int 32732c142baaSStanislav Kinsbursky STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) 32741da177e4SLinus Torvalds { 32752c142baaSStanislav Kinsbursky if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) 3276e4e83ea4SJ. Bruce Fields return 0; 32778c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32788c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32791da177e4SLinus Torvalds return 1; 32801da177e4SLinus Torvalds } 32811da177e4SLinus Torvalds 32821da177e4SLinus Torvalds static inline int 328382c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 32841da177e4SLinus Torvalds { 328582c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 328682c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 328782c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 32881da177e4SLinus Torvalds } 32891da177e4SLinus Torvalds 32901da177e4SLinus Torvalds static inline int 329182c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 32921da177e4SLinus Torvalds { 329382c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 329482c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 32951da177e4SLinus Torvalds } 32961da177e4SLinus Torvalds 32971da177e4SLinus Torvalds static 3298dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 32991da177e4SLinus Torvalds { 3300b37ad28bSAl Viro __be32 status = nfserr_openmode; 33011da177e4SLinus Torvalds 330202921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 330302921914SJ. Bruce Fields if (stp->st_openstp) 330402921914SJ. Bruce Fields stp = stp->st_openstp; 330582c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 33061da177e4SLinus Torvalds goto out; 330782c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 33081da177e4SLinus Torvalds goto out; 33091da177e4SLinus Torvalds status = nfs_ok; 33101da177e4SLinus Torvalds out: 33111da177e4SLinus Torvalds return status; 33121da177e4SLinus Torvalds } 33131da177e4SLinus Torvalds 3314b37ad28bSAl Viro static inline __be32 33155ccb0066SStanislav Kinsbursky check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) 33161da177e4SLinus Torvalds { 3317203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 33181da177e4SLinus Torvalds return nfs_ok; 33195ccb0066SStanislav Kinsbursky else if (locks_in_grace(net)) { 332025985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 33211da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 33221da177e4SLinus Torvalds return nfserr_grace; 33231da177e4SLinus Torvalds } else if (flags & WR_STATE) 33241da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33251da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 33261da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 33271da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33281da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 33291da177e4SLinus Torvalds } 33301da177e4SLinus Torvalds 33311da177e4SLinus Torvalds /* 33321da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33331da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33341da177e4SLinus Torvalds */ 33351da177e4SLinus Torvalds static inline int 33365ccb0066SStanislav Kinsbursky grace_disallows_io(struct net *net, struct inode *inode) 33371da177e4SLinus Torvalds { 33385ccb0066SStanislav Kinsbursky return locks_in_grace(net) && mandatory_lock(inode); 33391da177e4SLinus Torvalds } 33401da177e4SLinus Torvalds 334181b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 334281b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 334381b82965SJ. Bruce Fields { 334481b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 334581b82965SJ. Bruce Fields } 334681b82965SJ. Bruce Fields 334757b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33480836f587SJ. Bruce Fields { 33496668958fSAndy Adamson /* 33506668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33516668958fSAndy Adamson * when it is zero. 33526668958fSAndy Adamson */ 335328dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 335481b82965SJ. Bruce Fields return nfs_ok; 335581b82965SJ. Bruce Fields 335681b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 335781b82965SJ. Bruce Fields return nfs_ok; 33586668958fSAndy Adamson 33590836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 336081b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33610836f587SJ. Bruce Fields return nfserr_bad_stateid; 33620836f587SJ. Bruce Fields /* 336381b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 336481b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 336581b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 336681b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 336781b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 336881b82965SJ. Bruce Fields * but better performance may result in retrying IO that 336981b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 337081b82965SJ. Bruce Fields * reordered in flight: 33710836f587SJ. Bruce Fields */ 33720836f587SJ. Bruce Fields return nfserr_old_stateid; 33730836f587SJ. Bruce Fields } 33740836f587SJ. Bruce Fields 33757df302f7SChuck Lever static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 337617456804SBryan Schumaker { 337797b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 337897b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 337997b7e3b6SJ. Bruce Fields __be32 status; 338017456804SBryan Schumaker 33817df302f7SChuck Lever if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 33827df302f7SChuck Lever return nfserr_bad_stateid; 33837df302f7SChuck Lever /* Client debugging aid. */ 33847df302f7SChuck Lever if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { 33857df302f7SChuck Lever char addr_str[INET6_ADDRSTRLEN]; 33867df302f7SChuck Lever rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, 33877df302f7SChuck Lever sizeof(addr_str)); 33887df302f7SChuck Lever pr_warn_ratelimited("NFSD: client %s testing state ID " 33897df302f7SChuck Lever "with incorrect client ID\n", addr_str); 33907df302f7SChuck Lever return nfserr_bad_stateid; 33917df302f7SChuck Lever } 339238c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 339397b7e3b6SJ. Bruce Fields if (!s) 33947df302f7SChuck Lever return nfserr_bad_stateid; 339536279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 339617456804SBryan Schumaker if (status) 339717456804SBryan Schumaker return status; 339897b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 339997b7e3b6SJ. Bruce Fields return nfs_ok; 340097b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 340197b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3402dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 340397b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 340497b7e3b6SJ. Bruce Fields return nfs_ok; 340517456804SBryan Schumaker } 340617456804SBryan Schumaker 3407d15c077eSJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s, bool sessions) 340838c2f4b1SJ. Bruce Fields { 340938c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 34102c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 341138c2f4b1SJ. Bruce Fields 341238c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 341338c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 34142c142baaSStanislav Kinsbursky if (STALE_STATEID(stateid, nn)) 341538c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 3416d15c077eSJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions); 341738c2f4b1SJ. Bruce Fields if (!cl) 341838c2f4b1SJ. Bruce Fields return nfserr_expired; 341938c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 342038c2f4b1SJ. Bruce Fields if (!*s) 342138c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 342238c2f4b1SJ. Bruce Fields return nfs_ok; 342338c2f4b1SJ. Bruce Fields 342438c2f4b1SJ. Bruce Fields } 342538c2f4b1SJ. Bruce Fields 34261da177e4SLinus Torvalds /* 34271da177e4SLinus Torvalds * Checks for stateid operations 34281da177e4SLinus Torvalds */ 3429b37ad28bSAl Viro __be32 34305ccb0066SStanislav Kinsbursky nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, 3431dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 34321da177e4SLinus Torvalds { 343369064a27SJ. Bruce Fields struct nfs4_stid *s; 3434dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34351da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3436dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34371da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3438b37ad28bSAl Viro __be32 status; 34391da177e4SLinus Torvalds 34401da177e4SLinus Torvalds if (filpp) 34411da177e4SLinus Torvalds *filpp = NULL; 34421da177e4SLinus Torvalds 34435ccb0066SStanislav Kinsbursky if (grace_disallows_io(net, ino)) 34441da177e4SLinus Torvalds return nfserr_grace; 34451da177e4SLinus Torvalds 34461da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34475ccb0066SStanislav Kinsbursky return check_special_stateids(net, current_fh, stateid, flags); 34481da177e4SLinus Torvalds 3449d15c077eSJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s, cstate->minorversion); 345038c2f4b1SJ. Bruce Fields if (status) 345138c2f4b1SJ. Bruce Fields return status; 345269064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34530c2a498fSJ. Bruce Fields if (status) 34540c2a498fSJ. Bruce Fields goto out; 3455f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3456f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 345769064a27SJ. Bruce Fields dp = delegstateid(s); 3458dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3459dc9bf700SJ. Bruce Fields if (status) 3460dc9bf700SJ. Bruce Fields goto out; 346143b0178eSDan Carpenter if (filpp) { 3462acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3463f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 346443b0178eSDan Carpenter } 3465f7a4d872SJ. Bruce Fields break; 3466f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3467f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 346869064a27SJ. Bruce Fields stp = openlockstateid(s); 3469f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3470f7a4d872SJ. Bruce Fields if (status) 34711da177e4SLinus Torvalds goto out; 3472fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3473dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34741da177e4SLinus Torvalds goto out; 3475a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3476a4455be0SJ. Bruce Fields if (status) 34771da177e4SLinus Torvalds goto out; 3478f9d7562fSJ. Bruce Fields if (filpp) { 3479f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3480f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3481f9d7562fSJ. Bruce Fields else 3482f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3483f9d7562fSJ. Bruce Fields } 3484f7a4d872SJ. Bruce Fields break; 3485f7a4d872SJ. Bruce Fields default: 3486f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 34871da177e4SLinus Torvalds } 34881da177e4SLinus Torvalds status = nfs_ok; 34891da177e4SLinus Torvalds out: 34901da177e4SLinus Torvalds return status; 34911da177e4SLinus Torvalds } 34921da177e4SLinus Torvalds 3493e1ca12dfSBryan Schumaker static __be32 3494dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3495e1ca12dfSBryan Schumaker { 3496fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3497e1ca12dfSBryan Schumaker return nfserr_locks_held; 3498e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3499e1ca12dfSBryan Schumaker return nfs_ok; 3500e1ca12dfSBryan Schumaker } 3501e1ca12dfSBryan Schumaker 3502e1ca12dfSBryan Schumaker /* 350317456804SBryan Schumaker * Test if the stateid is valid 350417456804SBryan Schumaker */ 350517456804SBryan Schumaker __be32 350617456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 350717456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 350817456804SBryan Schumaker { 350903cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 351003cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 351103cfb420SBryan Schumaker 351203cfb420SBryan Schumaker nfs4_lock_state(); 351303cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 35147df302f7SChuck Lever stateid->ts_id_status = 35157df302f7SChuck Lever nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); 351603cfb420SBryan Schumaker nfs4_unlock_state(); 351703cfb420SBryan Schumaker 351817456804SBryan Schumaker return nfs_ok; 351917456804SBryan Schumaker } 352017456804SBryan Schumaker 3521e1ca12dfSBryan Schumaker __be32 3522e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3523e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3524e1ca12dfSBryan Schumaker { 3525e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 35262da1cec7SJ. Bruce Fields struct nfs4_stid *s; 352738c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 35282da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3529e1ca12dfSBryan Schumaker 3530e1ca12dfSBryan Schumaker nfs4_lock_state(); 353138c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 35322da1cec7SJ. Bruce Fields if (!s) 3533e1ca12dfSBryan Schumaker goto out; 35342da1cec7SJ. Bruce Fields switch (s->sc_type) { 35352da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3536e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3537e1ca12dfSBryan Schumaker goto out; 35382da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35392da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35402da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35412da1cec7SJ. Bruce Fields if (ret) 3542e1ca12dfSBryan Schumaker goto out; 35432da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35442da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35452da1cec7SJ. Bruce Fields else 35462da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3547f7a4d872SJ. Bruce Fields break; 3548f7a4d872SJ. Bruce Fields default: 3549f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3550e1ca12dfSBryan Schumaker } 3551e1ca12dfSBryan Schumaker out: 3552e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3553e1ca12dfSBryan Schumaker return ret; 3554e1ca12dfSBryan Schumaker } 3555e1ca12dfSBryan Schumaker 35564c4cd222SNeilBrown static inline int 35574c4cd222SNeilBrown setlkflg (int type) 35584c4cd222SNeilBrown { 35594c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35604c4cd222SNeilBrown RD_STATE : WR_STATE; 35614c4cd222SNeilBrown } 35621da177e4SLinus Torvalds 3563dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3564c0a5d93eSJ. Bruce Fields { 3565c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3566c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3567c0a5d93eSJ. Bruce Fields __be32 status; 3568c0a5d93eSJ. Bruce Fields 3569c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3570c0a5d93eSJ. Bruce Fields if (status) 3571c0a5d93eSJ. Bruce Fields return status; 3572f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3573f7a4d872SJ. Bruce Fields /* 3574f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3575f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3576f7a4d872SJ. Bruce Fields */ 3577f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3578f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3579f7a4d872SJ. Bruce Fields if (status) 3580f7a4d872SJ. Bruce Fields return status; 3581f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3582c0a5d93eSJ. Bruce Fields } 3583c0a5d93eSJ. Bruce Fields 35841da177e4SLinus Torvalds /* 35851da177e4SLinus Torvalds * Checks for sequence id mutating operations. 35861da177e4SLinus Torvalds */ 3587b37ad28bSAl Viro static __be32 3588dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 35892288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3590dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 35911da177e4SLinus Torvalds { 35920836f587SJ. Bruce Fields __be32 status; 359338c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 35941da177e4SLinus Torvalds 35958c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 35968c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 35971da177e4SLinus Torvalds 35981da177e4SLinus Torvalds *stpp = NULL; 3599d15c077eSJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s, cstate->minorversion); 3600c0a5d93eSJ. Bruce Fields if (status) 3601c0a5d93eSJ. Bruce Fields return status; 360238c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3603c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 36041da177e4SLinus Torvalds 3605c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 36061da177e4SLinus Torvalds } 36071da177e4SLinus Torvalds 3608dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3609c0a5d93eSJ. Bruce Fields { 3610c0a5d93eSJ. Bruce Fields __be32 status; 3611c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 36121da177e4SLinus Torvalds 3613c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 36142288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 36150836f587SJ. Bruce Fields if (status) 36160836f587SJ. Bruce Fields return status; 3617c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3618dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3619c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 36203a4f98bbSNeilBrown return nfs_ok; 36211da177e4SLinus Torvalds } 36221da177e4SLinus Torvalds 3623b37ad28bSAl Viro __be32 3624ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3625a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 36261da177e4SLinus Torvalds { 3627b37ad28bSAl Viro __be32 status; 3628fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3629dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36301da177e4SLinus Torvalds 36311da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3632ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3633ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36341da177e4SLinus Torvalds 3635ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3636a8cddc5dSJ. Bruce Fields if (status) 3637a8cddc5dSJ. Bruce Fields return status; 36381da177e4SLinus Torvalds 36391da177e4SLinus Torvalds nfs4_lock_state(); 36401da177e4SLinus Torvalds 36419072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3642ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36432288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36449072d5c6SJ. Bruce Fields if (status) 36451da177e4SLinus Torvalds goto out; 3646fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 364768b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3648dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 364968b66e82SJ. Bruce Fields goto out; 3650dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3651dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3652dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36538c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3654dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3655c7b9a459SNeilBrown 36562a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 365768b66e82SJ. Bruce Fields status = nfs_ok; 36581da177e4SLinus Torvalds out: 36595ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36601da177e4SLinus Torvalds nfs4_unlock_state(); 36611da177e4SLinus Torvalds return status; 36621da177e4SLinus Torvalds } 36631da177e4SLinus Torvalds 36646409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36651da177e4SLinus Torvalds { 366682c5ff1bSJeff Layton if (!test_access(access, stp)) 36676409a5a6SJ. Bruce Fields return; 36686409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 366982c5ff1bSJeff Layton clear_access(access, stp); 3670f197c271SJ. Bruce Fields } 36716409a5a6SJ. Bruce Fields 36726409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36736409a5a6SJ. Bruce Fields { 36746409a5a6SJ. Bruce Fields switch (to_access) { 36756409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36766409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36776409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36786409a5a6SJ. Bruce Fields break; 36796409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36806409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36816409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36826409a5a6SJ. Bruce Fields break; 36836409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36846409a5a6SJ. Bruce Fields break; 36856409a5a6SJ. Bruce Fields default: 36866409a5a6SJ. Bruce Fields BUG(); 36871da177e4SLinus Torvalds } 36881da177e4SLinus Torvalds } 36891da177e4SLinus Torvalds 36901da177e4SLinus Torvalds static void 3691ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 36921da177e4SLinus Torvalds { 36931da177e4SLinus Torvalds int i; 36941da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 36951da177e4SLinus Torvalds if ((i & deny) != i) 3696ce0fc43cSJeff Layton clear_deny(i, stp); 36971da177e4SLinus Torvalds } 36981da177e4SLinus Torvalds } 36991da177e4SLinus Torvalds 3700b37ad28bSAl Viro __be32 3701ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3702ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3703a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 37041da177e4SLinus Torvalds { 3705b37ad28bSAl Viro __be32 status; 3706dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37071da177e4SLinus Torvalds 37081da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3709ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3710ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37111da177e4SLinus Torvalds 3712c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 37132c8bd7e0SBenny Halevy if (od->od_deleg_want) 37142c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 37152c8bd7e0SBenny Halevy od->od_deleg_want); 37161da177e4SLinus Torvalds 37171da177e4SLinus Torvalds nfs4_lock_state(); 3718c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3719c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 37209072d5c6SJ. Bruce Fields if (status) 37211da177e4SLinus Torvalds goto out; 37221da177e4SLinus Torvalds status = nfserr_inval; 372382c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 37241da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 37251da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 37261da177e4SLinus Torvalds goto out; 37271da177e4SLinus Torvalds } 3728ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 37291da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 37301da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 37311da177e4SLinus Torvalds goto out; 37321da177e4SLinus Torvalds } 37336409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37341da177e4SLinus Torvalds 3735ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 37361da177e4SLinus Torvalds 3737dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3738dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37391da177e4SLinus Torvalds status = nfs_ok; 37401da177e4SLinus Torvalds out: 37415ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37421da177e4SLinus Torvalds nfs4_unlock_state(); 37431da177e4SLinus Torvalds return status; 37441da177e4SLinus Torvalds } 37451da177e4SLinus Torvalds 374638c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 374738c387b5SJ. Bruce Fields { 374838c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 374938c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 375038c387b5SJ. Bruce Fields 375138c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 375238c387b5SJ. Bruce Fields return; 375338c387b5SJ. Bruce Fields oo = openowner(so); 375438c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 375538c387b5SJ. Bruce Fields if (!s) 375638c387b5SJ. Bruce Fields return; 375738c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 375838c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 375938c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 376038c387b5SJ. Bruce Fields return; 376138c387b5SJ. Bruce Fields } 376238c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3763f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3764f7a4d872SJ. Bruce Fields } 3765f7a4d872SJ. Bruce Fields 3766f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3767f7a4d872SJ. Bruce Fields { 3768f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3769f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 377038c387b5SJ. Bruce Fields } 377138c387b5SJ. Bruce Fields 37721da177e4SLinus Torvalds /* 37731da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37741da177e4SLinus Torvalds */ 3775b37ad28bSAl Viro __be32 3776ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3777a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37781da177e4SLinus Torvalds { 3779b37ad28bSAl Viro __be32 status; 3780fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3781dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37821da177e4SLinus Torvalds 37831da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3784ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3785ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37861da177e4SLinus Torvalds 37871da177e4SLinus Torvalds nfs4_lock_state(); 3788f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3789f7a4d872SJ. Bruce Fields &close->cl_stateid, 3790f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3791f7a4d872SJ. Bruce Fields &stp); 37929072d5c6SJ. Bruce Fields if (status) 37931da177e4SLinus Torvalds goto out; 3794fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 37951da177e4SLinus Torvalds status = nfs_ok; 3796dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3797dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37981da177e4SLinus Torvalds 3799f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 3800cf9182e9SJ. Bruce Fields release_last_closed_stateid(oo); 380138c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 380204ef5954SJ. Bruce Fields 380374dbafafSJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) { 380474dbafafSJ. Bruce Fields if (cstate->minorversion) { 380574dbafafSJ. Bruce Fields release_openowner(oo); 380674dbafafSJ. Bruce Fields cstate->replay_owner = NULL; 380774dbafafSJ. Bruce Fields } else { 380874dbafafSJ. Bruce Fields /* 380974dbafafSJ. Bruce Fields * In the 4.0 case we need to keep the owners around a 381074dbafafSJ. Bruce Fields * little while to handle CLOSE replay. 381104ef5954SJ. Bruce Fields */ 3812fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3813fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 381474dbafafSJ. Bruce Fields } 381574dbafafSJ. Bruce Fields } 38161da177e4SLinus Torvalds out: 38175ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 38181da177e4SLinus Torvalds nfs4_unlock_state(); 38191da177e4SLinus Torvalds return status; 38201da177e4SLinus Torvalds } 38211da177e4SLinus Torvalds 3822b37ad28bSAl Viro __be32 3823ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3824ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 38251da177e4SLinus Torvalds { 3826203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3827203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 382838c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3829b37ad28bSAl Viro __be32 status; 38301da177e4SLinus Torvalds 3831ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3832203a8c8eSJ. Bruce Fields return status; 38331da177e4SLinus Torvalds 38341da177e4SLinus Torvalds nfs4_lock_state(); 3835d15c077eSJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, cstate->minorversion); 383638c2f4b1SJ. Bruce Fields if (status) 3837203a8c8eSJ. Bruce Fields goto out; 383838c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3839d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3840203a8c8eSJ. Bruce Fields if (status) 3841203a8c8eSJ. Bruce Fields goto out; 3842203a8c8eSJ. Bruce Fields 3843203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38441da177e4SLinus Torvalds out: 3845203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3846203a8c8eSJ. Bruce Fields 38471da177e4SLinus Torvalds return status; 38481da177e4SLinus Torvalds } 38491da177e4SLinus Torvalds 38501da177e4SLinus Torvalds 38511da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38521da177e4SLinus Torvalds 3853009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3854009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3855009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38561da177e4SLinus Torvalds 385787df4de8SBenny Halevy static inline u64 385887df4de8SBenny Halevy end_offset(u64 start, u64 len) 385987df4de8SBenny Halevy { 386087df4de8SBenny Halevy u64 end; 386187df4de8SBenny Halevy 386287df4de8SBenny Halevy end = start + len; 386387df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 386487df4de8SBenny Halevy } 386587df4de8SBenny Halevy 386687df4de8SBenny Halevy /* last octet in a range */ 386787df4de8SBenny Halevy static inline u64 386887df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 386987df4de8SBenny Halevy { 387087df4de8SBenny Halevy u64 end; 387187df4de8SBenny Halevy 387287df4de8SBenny Halevy BUG_ON(!len); 387387df4de8SBenny Halevy end = start + len; 387487df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 387587df4de8SBenny Halevy } 387687df4de8SBenny Halevy 3877009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38781da177e4SLinus Torvalds { 38791da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38801da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3881009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38821da177e4SLinus Torvalds } 38831da177e4SLinus Torvalds 3884009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 38851da177e4SLinus Torvalds 38861da177e4SLinus Torvalds /* 38871da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38881da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38891da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38901da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38911da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 38921da177e4SLinus Torvalds * the VFS, but this is a very deep change! 38931da177e4SLinus Torvalds */ 38941da177e4SLinus Torvalds static inline void 38951da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 38961da177e4SLinus Torvalds { 38971da177e4SLinus Torvalds if (lock->fl_start < 0) 38981da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 38991da177e4SLinus Torvalds if (lock->fl_end < 0) 39001da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 39011da177e4SLinus Torvalds } 39021da177e4SLinus Torvalds 3903d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3904d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 39057b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3906d5b9026aSNeilBrown }; 39071da177e4SLinus Torvalds 39081da177e4SLinus Torvalds static inline void 39091da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 39101da177e4SLinus Torvalds { 3911fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39121da177e4SLinus Torvalds 3913d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3914fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3915fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3916fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 39177c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 39187c13f344SJ. Bruce Fields /* We just don't care that much */ 39197c13f344SJ. Bruce Fields goto nevermind; 3920fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3921fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3922d5b9026aSNeilBrown } else { 39237c13f344SJ. Bruce Fields nevermind: 39247c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 39257c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3926d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3927d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 39281da177e4SLinus Torvalds } 39291da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 393087df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 393187df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 39321da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39331da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39341da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39351da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39361da177e4SLinus Torvalds } 39371da177e4SLinus Torvalds 3938b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3939b93d87c1SJ. Bruce Fields { 3940b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3941b93d87c1SJ. Bruce Fields 3942b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3943b93d87c1SJ. Bruce Fields return false; 3944b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3945b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3946b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3947b93d87c1SJ. Bruce Fields } 3948b93d87c1SJ. Bruce Fields 3949fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3950fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 39511da177e4SLinus Torvalds struct xdr_netobj *owner) 39521da177e4SLinus Torvalds { 3953009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3954b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39551da177e4SLinus Torvalds 3956009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3957b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3958b93d87c1SJ. Bruce Fields return lo; 39591da177e4SLinus Torvalds } 39601da177e4SLinus Torvalds return NULL; 39611da177e4SLinus Torvalds } 39621da177e4SLinus Torvalds 3963dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3964ff194bd9SJ. Bruce Fields { 3965009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3966009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3967009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3968009673b4SJ. Bruce Fields 396916bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3970009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3971fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3972ff194bd9SJ. Bruce Fields } 3973ff194bd9SJ. Bruce Fields 39741da177e4SLinus Torvalds /* 39751da177e4SLinus Torvalds * Alloc a lock owner structure. 39761da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 397725985edcSLucas De Marchi * occurred. 39781da177e4SLinus Torvalds * 397916bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39801da177e4SLinus Torvalds */ 39811da177e4SLinus Torvalds 3982fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3983dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3984fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39851da177e4SLinus Torvalds 3986fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3987fe0750e5SJ. Bruce Fields if (!lo) 39881da177e4SLinus Torvalds return NULL; 3989fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3990fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3991b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3992b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3993fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3994fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3995fe0750e5SJ. Bruce Fields return lo; 39961da177e4SLinus Torvalds } 39971da177e4SLinus Torvalds 3998dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3999dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 40001da177e4SLinus Torvalds { 4001dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 4002d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 40031da177e4SLinus Torvalds 4004996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 40055ac049acSNeilBrown if (stp == NULL) 40066136d2b4SJ. Bruce Fields return NULL; 4007996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 40088beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 4009fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 4010fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 401113cd2184SNeilBrown get_nfs4_file(fp); 40121da177e4SLinus Torvalds stp->st_file = fp; 40130997b173SJ. Bruce Fields stp->st_access_bmap = 0; 40141da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 40154c4cd222SNeilBrown stp->st_openstp = open_stp; 40161da177e4SLinus Torvalds return stp; 40171da177e4SLinus Torvalds } 40181da177e4SLinus Torvalds 4019fd39ca9aSNeilBrown static int 40201da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 40211da177e4SLinus Torvalds { 402287df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 40231da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 40241da177e4SLinus Torvalds } 40251da177e4SLinus Torvalds 4026dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 40270997b173SJ. Bruce Fields { 40280997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 40290997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 40300997b173SJ. Bruce Fields 403182c5ff1bSJeff Layton if (test_access(access, lock_stp)) 40320997b173SJ. Bruce Fields return; 40330997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 403482c5ff1bSJeff Layton set_access(access, lock_stp); 40350997b173SJ. Bruce Fields } 40360997b173SJ. Bruce Fields 40372355c596SJ. 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) 403864a284d0SJ. Bruce Fields { 403964a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 404064a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 404164a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 404264a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 404364a284d0SJ. Bruce Fields unsigned int strhashval; 404464a284d0SJ. Bruce Fields 404564a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 404664a284d0SJ. Bruce Fields if (lo) { 404764a284d0SJ. Bruce Fields if (!cstate->minorversion) 404864a284d0SJ. Bruce Fields return nfserr_bad_seqid; 404964a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 405064a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 405164a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 405264a284d0SJ. Bruce Fields return nfs_ok; 405364a284d0SJ. Bruce Fields } 405416bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 405564a284d0SJ. Bruce Fields &lock->v.new.owner); 405664a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 405764a284d0SJ. Bruce Fields if (lo == NULL) 405864a284d0SJ. Bruce Fields return nfserr_jukebox; 405964a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 406064a284d0SJ. Bruce Fields if (*lst == NULL) { 406164a284d0SJ. Bruce Fields release_lockowner(lo); 406264a284d0SJ. Bruce Fields return nfserr_jukebox; 406364a284d0SJ. Bruce Fields } 406464a284d0SJ. Bruce Fields *new = true; 406564a284d0SJ. Bruce Fields return nfs_ok; 406664a284d0SJ. Bruce Fields } 406764a284d0SJ. Bruce Fields 40681da177e4SLinus Torvalds /* 40691da177e4SLinus Torvalds * LOCK operation 40701da177e4SLinus Torvalds */ 4071b37ad28bSAl Viro __be32 4072ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4073a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40741da177e4SLinus Torvalds { 4075fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4076fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4077dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40787d947842SJ. Bruce Fields struct file *filp = NULL; 407921179d81SJeff Layton struct file_lock *file_lock = NULL; 408021179d81SJeff Layton struct file_lock *conflock = NULL; 4081b37ad28bSAl Viro __be32 status = 0; 408264a284d0SJ. Bruce Fields bool new_state = false; 4083b34f27aaSJ. Bruce Fields int lkflg; 4084b8dd7b9aSAl Viro int err; 40852c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 40861da177e4SLinus Torvalds 40871da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40881da177e4SLinus Torvalds (long long) lock->lk_offset, 40891da177e4SLinus Torvalds (long long) lock->lk_length); 40901da177e4SLinus Torvalds 40911da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 40921da177e4SLinus Torvalds return nfserr_inval; 40931da177e4SLinus Torvalds 4094ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 40958837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4096a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4097a6f6ef2fSAndy Adamson return status; 4098a6f6ef2fSAndy Adamson } 4099a6f6ef2fSAndy Adamson 41001da177e4SLinus Torvalds nfs4_lock_state(); 41011da177e4SLinus Torvalds 41021da177e4SLinus Torvalds if (lock->lk_is_new) { 4103dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 41041da177e4SLinus Torvalds 4105684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4106684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4107684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4108684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4109684e5638SJ. Bruce Fields sizeof(clientid_t)); 4110684e5638SJ. Bruce Fields 41111da177e4SLinus Torvalds status = nfserr_stale_clientid; 41122c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) 41131da177e4SLinus Torvalds goto out; 41141da177e4SLinus Torvalds 41151da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4116c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 41171da177e4SLinus Torvalds lock->lk_new_open_seqid, 41181da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4119c0a5d93eSJ. Bruce Fields &open_stp); 412037515177SNeilBrown if (status) 41211da177e4SLinus Torvalds goto out; 4122fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4123b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4124684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4125b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4126b34f27aaSJ. Bruce Fields goto out; 412764a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 412864a284d0SJ. Bruce Fields &lock_stp, &new_state); 4129e1aaa891SJ. Bruce Fields } else 4130dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 41311da177e4SLinus Torvalds lock->lk_old_lock_seqid, 41321da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41332288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 41341da177e4SLinus Torvalds if (status) 41351da177e4SLinus Torvalds goto out; 4136fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41371da177e4SLinus Torvalds 4138b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4139b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4140b34f27aaSJ. Bruce Fields if (status) 4141b34f27aaSJ. Bruce Fields goto out; 4142b34f27aaSJ. Bruce Fields 41430dd395dcSNeilBrown status = nfserr_grace; 41445ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) 41450dd395dcSNeilBrown goto out; 41460dd395dcSNeilBrown status = nfserr_no_grace; 41475ccb0066SStanislav Kinsbursky if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) 41480dd395dcSNeilBrown goto out; 41490dd395dcSNeilBrown 415021179d81SJeff Layton file_lock = locks_alloc_lock(); 415121179d81SJeff Layton if (!file_lock) { 415221179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 415321179d81SJeff Layton status = nfserr_jukebox; 415421179d81SJeff Layton goto out; 415521179d81SJeff Layton } 415621179d81SJeff Layton 415721179d81SJeff Layton locks_init_lock(file_lock); 41581da177e4SLinus Torvalds switch (lock->lk_type) { 41591da177e4SLinus Torvalds case NFS4_READ_LT: 41601da177e4SLinus Torvalds case NFS4_READW_LT: 4161f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41620997b173SJ. Bruce Fields if (filp) 41630997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 416421179d81SJeff Layton file_lock->fl_type = F_RDLCK; 41651da177e4SLinus Torvalds break; 41661da177e4SLinus Torvalds case NFS4_WRITE_LT: 41671da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4168f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41690997b173SJ. Bruce Fields if (filp) 41700997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 417121179d81SJeff Layton file_lock->fl_type = F_WRLCK; 41721da177e4SLinus Torvalds break; 41731da177e4SLinus Torvalds default: 41741da177e4SLinus Torvalds status = nfserr_inval; 41751da177e4SLinus Torvalds goto out; 41761da177e4SLinus Torvalds } 4177f9d7562fSJ. Bruce Fields if (!filp) { 4178f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4179f9d7562fSJ. Bruce Fields goto out; 4180f9d7562fSJ. Bruce Fields } 418121179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lock_sop; 418221179d81SJeff Layton file_lock->fl_pid = current->tgid; 418321179d81SJeff Layton file_lock->fl_file = filp; 418421179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 418521179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 418621179d81SJeff Layton file_lock->fl_start = lock->lk_offset; 418721179d81SJeff Layton file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 418821179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 41891da177e4SLinus Torvalds 419021179d81SJeff Layton conflock = locks_alloc_lock(); 419121179d81SJeff Layton if (!conflock) { 419221179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 419321179d81SJeff Layton status = nfserr_jukebox; 419421179d81SJeff Layton goto out; 419521179d81SJeff Layton } 41961da177e4SLinus Torvalds 419721179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); 4198b8dd7b9aSAl Viro switch (-err) { 41991da177e4SLinus Torvalds case 0: /* success! */ 4200dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4201dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 42021da177e4SLinus Torvalds sizeof(stateid_t)); 4203b8dd7b9aSAl Viro status = 0; 4204eb76b3fdSAndy Adamson break; 4205eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4206eb76b3fdSAndy Adamson status = nfserr_denied; 4207eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 420821179d81SJeff Layton nfs4_set_lock_denied(conflock, &lock->lk_denied); 4209eb76b3fdSAndy Adamson break; 42101da177e4SLinus Torvalds case (EDEADLK): 42111da177e4SLinus Torvalds status = nfserr_deadlock; 4212eb76b3fdSAndy Adamson break; 42131da177e4SLinus Torvalds default: 4214fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 42153e772463SJ. Bruce Fields status = nfserrno(err); 4216eb76b3fdSAndy Adamson break; 42171da177e4SLinus Torvalds } 42181da177e4SLinus Torvalds out: 421964a284d0SJ. Bruce Fields if (status && new_state) 4220f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 42215ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 42221da177e4SLinus Torvalds nfs4_unlock_state(); 422321179d81SJeff Layton if (file_lock) 422421179d81SJeff Layton locks_free_lock(file_lock); 422521179d81SJeff Layton if (conflock) 422621179d81SJeff Layton locks_free_lock(conflock); 42271da177e4SLinus Torvalds return status; 42281da177e4SLinus Torvalds } 42291da177e4SLinus Torvalds 42301da177e4SLinus Torvalds /* 423155ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 423255ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 423355ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 423455ef1274SJ. Bruce Fields * inode operation.) 423555ef1274SJ. Bruce Fields */ 423604da6e9dSAl Viro static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 423755ef1274SJ. Bruce Fields { 423855ef1274SJ. Bruce Fields struct file *file; 423904da6e9dSAl Viro __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 424004da6e9dSAl Viro if (!err) { 424104da6e9dSAl Viro err = nfserrno(vfs_test_lock(file, lock)); 424255ef1274SJ. Bruce Fields nfsd_close(file); 424304da6e9dSAl Viro } 424455ef1274SJ. Bruce Fields return err; 424555ef1274SJ. Bruce Fields } 424655ef1274SJ. Bruce Fields 424755ef1274SJ. Bruce Fields /* 42481da177e4SLinus Torvalds * LOCKT operation 42491da177e4SLinus Torvalds */ 4250b37ad28bSAl Viro __be32 4251ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4252ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42531da177e4SLinus Torvalds { 42541da177e4SLinus Torvalds struct inode *inode; 425521179d81SJeff Layton struct file_lock *file_lock = NULL; 4256fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4257b37ad28bSAl Viro __be32 status; 42582c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 42591da177e4SLinus Torvalds 42605ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp))) 42611da177e4SLinus Torvalds return nfserr_grace; 42621da177e4SLinus Torvalds 42631da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42641da177e4SLinus Torvalds return nfserr_inval; 42651da177e4SLinus Torvalds 42661da177e4SLinus Torvalds nfs4_lock_state(); 42671da177e4SLinus Torvalds 42681da177e4SLinus Torvalds status = nfserr_stale_clientid; 42692c142baaSStanislav Kinsbursky if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) 42701da177e4SLinus Torvalds goto out; 42711da177e4SLinus Torvalds 427275c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42731da177e4SLinus Torvalds goto out; 42741da177e4SLinus Torvalds 4275ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 427621179d81SJeff Layton file_lock = locks_alloc_lock(); 427721179d81SJeff Layton if (!file_lock) { 427821179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 427921179d81SJeff Layton status = nfserr_jukebox; 428021179d81SJeff Layton goto out; 428121179d81SJeff Layton } 428221179d81SJeff Layton locks_init_lock(file_lock); 42831da177e4SLinus Torvalds switch (lockt->lt_type) { 42841da177e4SLinus Torvalds case NFS4_READ_LT: 42851da177e4SLinus Torvalds case NFS4_READW_LT: 428621179d81SJeff Layton file_lock->fl_type = F_RDLCK; 42871da177e4SLinus Torvalds break; 42881da177e4SLinus Torvalds case NFS4_WRITE_LT: 42891da177e4SLinus Torvalds case NFS4_WRITEW_LT: 429021179d81SJeff Layton file_lock->fl_type = F_WRLCK; 42911da177e4SLinus Torvalds break; 42921da177e4SLinus Torvalds default: 42932fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 42941da177e4SLinus Torvalds status = nfserr_inval; 42951da177e4SLinus Torvalds goto out; 42961da177e4SLinus Torvalds } 42971da177e4SLinus Torvalds 4298fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4299fe0750e5SJ. Bruce Fields if (lo) 430021179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lo; 430121179d81SJeff Layton file_lock->fl_pid = current->tgid; 430221179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 43031da177e4SLinus Torvalds 430421179d81SJeff Layton file_lock->fl_start = lockt->lt_offset; 430521179d81SJeff Layton file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 43061da177e4SLinus Torvalds 430721179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 43081da177e4SLinus Torvalds 430921179d81SJeff Layton status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); 431004da6e9dSAl Viro if (status) 4311fd85b817SMarc Eshel goto out; 431204da6e9dSAl Viro 431321179d81SJeff Layton if (file_lock->fl_type != F_UNLCK) { 43141da177e4SLinus Torvalds status = nfserr_denied; 431521179d81SJeff Layton nfs4_set_lock_denied(file_lock, &lockt->lt_denied); 43161da177e4SLinus Torvalds } 43171da177e4SLinus Torvalds out: 43181da177e4SLinus Torvalds nfs4_unlock_state(); 431921179d81SJeff Layton if (file_lock) 432021179d81SJeff Layton locks_free_lock(file_lock); 43211da177e4SLinus Torvalds return status; 43221da177e4SLinus Torvalds } 43231da177e4SLinus Torvalds 4324b37ad28bSAl Viro __be32 4325ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4326a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 43271da177e4SLinus Torvalds { 4328dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43291da177e4SLinus Torvalds struct file *filp = NULL; 433021179d81SJeff Layton struct file_lock *file_lock = NULL; 4331b37ad28bSAl Viro __be32 status; 4332b8dd7b9aSAl Viro int err; 43331da177e4SLinus Torvalds 43341da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 43351da177e4SLinus Torvalds (long long) locku->lu_offset, 43361da177e4SLinus Torvalds (long long) locku->lu_length); 43371da177e4SLinus Torvalds 43381da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 43391da177e4SLinus Torvalds return nfserr_inval; 43401da177e4SLinus Torvalds 43411da177e4SLinus Torvalds nfs4_lock_state(); 43421da177e4SLinus Torvalds 43439072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 43442288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 43459072d5c6SJ. Bruce Fields if (status) 43461da177e4SLinus Torvalds goto out; 4347f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4348f9d7562fSJ. Bruce Fields if (!filp) { 4349f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4350f9d7562fSJ. Bruce Fields goto out; 4351f9d7562fSJ. Bruce Fields } 435221179d81SJeff Layton file_lock = locks_alloc_lock(); 435321179d81SJeff Layton if (!file_lock) { 435421179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 435521179d81SJeff Layton status = nfserr_jukebox; 435621179d81SJeff Layton goto out; 435721179d81SJeff Layton } 435821179d81SJeff Layton locks_init_lock(file_lock); 435921179d81SJeff Layton file_lock->fl_type = F_UNLCK; 436021179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 436121179d81SJeff Layton file_lock->fl_pid = current->tgid; 436221179d81SJeff Layton file_lock->fl_file = filp; 436321179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 436421179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 436521179d81SJeff Layton file_lock->fl_start = locku->lu_offset; 43661da177e4SLinus Torvalds 436721179d81SJeff Layton file_lock->fl_end = last_byte_offset(locku->lu_offset, 436821179d81SJeff Layton locku->lu_length); 436921179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 43701da177e4SLinus Torvalds 43711da177e4SLinus Torvalds /* 43721da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43731da177e4SLinus Torvalds */ 437421179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); 4375b8dd7b9aSAl Viro if (err) { 4376fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43771da177e4SLinus Torvalds goto out_nfserr; 43781da177e4SLinus Torvalds } 43791da177e4SLinus Torvalds /* 43801da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43811da177e4SLinus Torvalds */ 4382dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4383dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43841da177e4SLinus Torvalds 43851da177e4SLinus Torvalds out: 438671c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43871da177e4SLinus Torvalds nfs4_unlock_state(); 438821179d81SJeff Layton if (file_lock) 438921179d81SJeff Layton locks_free_lock(file_lock); 43901da177e4SLinus Torvalds return status; 43911da177e4SLinus Torvalds 43921da177e4SLinus Torvalds out_nfserr: 4393b8dd7b9aSAl Viro status = nfserrno(err); 43941da177e4SLinus Torvalds goto out; 43951da177e4SLinus Torvalds } 43961da177e4SLinus Torvalds 43971da177e4SLinus Torvalds /* 43981da177e4SLinus Torvalds * returns 43991da177e4SLinus Torvalds * 1: locks held by lockowner 44001da177e4SLinus Torvalds * 0: no locks held by lockowner 44011da177e4SLinus Torvalds */ 44021da177e4SLinus Torvalds static int 4403fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 44041da177e4SLinus Torvalds { 44051da177e4SLinus Torvalds struct file_lock **flpp; 4406f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 44071da177e4SLinus Torvalds int status = 0; 44081da177e4SLinus Torvalds 4409b89f4321SArnd Bergmann lock_flocks(); 44101da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4411796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 44121da177e4SLinus Torvalds status = 1; 44131da177e4SLinus Torvalds goto out; 44141da177e4SLinus Torvalds } 4415796dadfdSJ. Bruce Fields } 44161da177e4SLinus Torvalds out: 4417b89f4321SArnd Bergmann unlock_flocks(); 44181da177e4SLinus Torvalds return status; 44191da177e4SLinus Torvalds } 44201da177e4SLinus Torvalds 4421b37ad28bSAl Viro __be32 4422b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4423b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4424b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 44251da177e4SLinus Torvalds { 44261da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 44273e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4428fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4429dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 44301da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 44313e9e3dbeSNeilBrown struct list_head matches; 443216bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4433b37ad28bSAl Viro __be32 status; 44342c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 44351da177e4SLinus Torvalds 44361da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 44371da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 44381da177e4SLinus Torvalds 44391da177e4SLinus Torvalds /* XXX check for lease expiration */ 44401da177e4SLinus Torvalds 44411da177e4SLinus Torvalds status = nfserr_stale_clientid; 44422c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 44431da177e4SLinus Torvalds return status; 44441da177e4SLinus Torvalds 44451da177e4SLinus Torvalds nfs4_lock_state(); 44461da177e4SLinus Torvalds 44471da177e4SLinus Torvalds status = nfserr_locks_held; 44483e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 444906f1f864SJ. Bruce Fields 445016bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 445116bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 445216bfdaafSJ. Bruce Fields continue; 4453599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 44543e9e3dbeSNeilBrown continue; 44553e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4456ea1da636SNeilBrown st_perstateowner) { 4457fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4458fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 44591da177e4SLinus Torvalds goto out; 4460fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 44611da177e4SLinus Torvalds } 44623e9e3dbeSNeilBrown } 44633e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44643e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44653e9e3dbeSNeilBrown * have been checked. */ 44661da177e4SLinus Torvalds status = nfs_ok; 44670fa822e4SNeilBrown while (!list_empty(&matches)) { 4468fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4469fe0750e5SJ. Bruce Fields lo_list); 44700fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 44710fa822e4SNeilBrown * for openowners. */ 4472fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4473fe0750e5SJ. Bruce Fields release_lockowner(lo); 44741da177e4SLinus Torvalds } 44751da177e4SLinus Torvalds out: 44761da177e4SLinus Torvalds nfs4_unlock_state(); 44771da177e4SLinus Torvalds return status; 44781da177e4SLinus Torvalds } 44791da177e4SLinus Torvalds 44801da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4481a55370a3SNeilBrown alloc_reclaim(void) 44821da177e4SLinus Torvalds { 4483a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44841da177e4SLinus Torvalds } 44851da177e4SLinus Torvalds 4486c7b9a459SNeilBrown int 4487a0af710aSJeff Layton nfs4_has_reclaimed_state(const char *name) 4488c7b9a459SNeilBrown { 4489c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4490c7b9a459SNeilBrown struct nfs4_client *clp; 4491c7b9a459SNeilBrown 4492e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4493393d8ed8SJ. Bruce Fields if (!clp) 4494393d8ed8SJ. Bruce Fields return 0; 4495a52d726bSJeff Layton return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); 4496c7b9a459SNeilBrown } 4497c7b9a459SNeilBrown 44981da177e4SLinus Torvalds /* 44991da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 45001da177e4SLinus Torvalds */ 4501190e4fbfSNeilBrown int 4502190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 45031da177e4SLinus Torvalds { 45041da177e4SLinus Torvalds unsigned int strhashval; 45051da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45061da177e4SLinus Torvalds 4507a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4508a55370a3SNeilBrown crp = alloc_reclaim(); 45091da177e4SLinus Torvalds if (!crp) 45101da177e4SLinus Torvalds return 0; 4511a55370a3SNeilBrown strhashval = clientstr_hashval(name); 45121da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 45131da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4514a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 45151da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 45161da177e4SLinus Torvalds return 1; 45171da177e4SLinus Torvalds } 45181da177e4SLinus Torvalds 45192a4317c5SJeff Layton void 45201da177e4SLinus Torvalds nfs4_release_reclaim(void) 45211da177e4SLinus Torvalds { 45221da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45231da177e4SLinus Torvalds int i; 45241da177e4SLinus Torvalds 45251da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 45261da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 45271da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 45281da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 45291da177e4SLinus Torvalds list_del(&crp->cr_strhash); 45301da177e4SLinus Torvalds kfree(crp); 45311da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 45321da177e4SLinus Torvalds } 45331da177e4SLinus Torvalds } 45341da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 45351da177e4SLinus Torvalds } 45361da177e4SLinus Torvalds 45371da177e4SLinus Torvalds /* 45381da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 45392a4317c5SJeff Layton struct nfs4_client_reclaim * 4540278c931cSJeff Layton nfsd4_find_reclaim_client(const char *recdir) 45411da177e4SLinus Torvalds { 45421da177e4SLinus Torvalds unsigned int strhashval; 45431da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45441da177e4SLinus Torvalds 4545278c931cSJeff Layton dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); 45461da177e4SLinus Torvalds 4547278c931cSJeff Layton strhashval = clientstr_hashval(recdir); 45481da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4549278c931cSJeff Layton if (same_name(crp->cr_recdir, recdir)) { 45501da177e4SLinus Torvalds return crp; 45511da177e4SLinus Torvalds } 45521da177e4SLinus Torvalds } 45531da177e4SLinus Torvalds return NULL; 45541da177e4SLinus Torvalds } 45551da177e4SLinus Torvalds 45561da177e4SLinus Torvalds /* 45571da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 45581da177e4SLinus Torvalds */ 4559b37ad28bSAl Viro __be32 4560d15c077eSJ. Bruce Fields nfs4_check_open_reclaim(clientid_t *clid, bool sessions) 45611da177e4SLinus Torvalds { 4562a52d726bSJeff Layton struct nfs4_client *clp; 4563a52d726bSJeff Layton 4564a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 4565d15c077eSJ. Bruce Fields clp = find_confirmed_client(clid, sessions); 4566a52d726bSJeff Layton if (clp == NULL) 4567a52d726bSJeff Layton return nfserr_reclaim_bad; 4568a52d726bSJeff Layton 4569a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45701da177e4SLinus Torvalds } 45711da177e4SLinus Torvalds 457265178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 457365178db4SBryan Schumaker 457465178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 457565178db4SBryan Schumaker { 457665178db4SBryan Schumaker struct nfs4_client *clp, *next; 457765178db4SBryan Schumaker int count = 0; 457865178db4SBryan Schumaker 457965178db4SBryan Schumaker nfs4_lock_state(); 458065178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 458165178db4SBryan Schumaker expire_client(clp); 458265178db4SBryan Schumaker if (++count == num) 458365178db4SBryan Schumaker break; 458465178db4SBryan Schumaker } 458565178db4SBryan Schumaker nfs4_unlock_state(); 458665178db4SBryan Schumaker 458765178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 458865178db4SBryan Schumaker } 458965178db4SBryan Schumaker 459065178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 459165178db4SBryan Schumaker { 459265178db4SBryan Schumaker release_lockowner(lockowner(sop)); 459365178db4SBryan Schumaker } 459465178db4SBryan Schumaker 459565178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 459665178db4SBryan Schumaker { 459765178db4SBryan Schumaker release_openowner(openowner(sop)); 459865178db4SBryan Schumaker } 459965178db4SBryan Schumaker 4600353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 460165178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 460265178db4SBryan Schumaker { 460365178db4SBryan Schumaker int i, count = 0; 460465178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 460565178db4SBryan Schumaker 460616bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 460716bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 460816bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 460916bfdaafSJ. Bruce Fields continue; 461065178db4SBryan Schumaker release_sop(sop); 461165178db4SBryan Schumaker if (++count == num) 461265178db4SBryan Schumaker return count; 461365178db4SBryan Schumaker } 461465178db4SBryan Schumaker } 461565178db4SBryan Schumaker return count; 461665178db4SBryan Schumaker } 461765178db4SBryan Schumaker 461865178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 461965178db4SBryan Schumaker { 462065178db4SBryan Schumaker int count; 462165178db4SBryan Schumaker 462265178db4SBryan Schumaker nfs4_lock_state(); 462316bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 462465178db4SBryan Schumaker nfs4_unlock_state(); 462565178db4SBryan Schumaker 462665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 462765178db4SBryan Schumaker } 462865178db4SBryan Schumaker 462965178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 463065178db4SBryan Schumaker { 463165178db4SBryan Schumaker int count; 463265178db4SBryan Schumaker 463365178db4SBryan Schumaker nfs4_lock_state(); 463416bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 463565178db4SBryan Schumaker nfs4_unlock_state(); 463665178db4SBryan Schumaker 463765178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 463865178db4SBryan Schumaker } 463965178db4SBryan Schumaker 4640da5c80a9SJ. Bruce Fields static int nfsd_process_n_delegations(u64 num, struct list_head *list) 464165178db4SBryan Schumaker { 464265178db4SBryan Schumaker int i, count = 0; 46432d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 46442d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 464565178db4SBryan Schumaker 464665178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 46472d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 46482d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 4649a6d88f29SStanislav Kinsbursky list_move(&dp->dl_recall_lru, list); 465065178db4SBryan Schumaker if (++count == num) 465165178db4SBryan Schumaker return count; 465265178db4SBryan Schumaker } 465365178db4SBryan Schumaker } 465465178db4SBryan Schumaker } 46552d3475c0SBryan Schumaker 465665178db4SBryan Schumaker return count; 465765178db4SBryan Schumaker } 465865178db4SBryan Schumaker 465965178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 466065178db4SBryan Schumaker { 466165178db4SBryan Schumaker unsigned int count; 4662a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4663a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 4664a6d88f29SStanislav Kinsbursky 4665a6d88f29SStanislav Kinsbursky spin_lock(&recall_lock); 4666a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4667a6d88f29SStanislav Kinsbursky spin_unlock(&recall_lock); 466865178db4SBryan Schumaker 466965178db4SBryan Schumaker nfs4_lock_state(); 4670a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) 4671a6d88f29SStanislav Kinsbursky unhash_delegation(dp); 467265178db4SBryan Schumaker nfs4_unlock_state(); 467365178db4SBryan Schumaker 467465178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 467565178db4SBryan Schumaker } 467665178db4SBryan Schumaker 467765178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 467865178db4SBryan Schumaker { 467965178db4SBryan Schumaker unsigned int count; 4680a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4681a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 468265178db4SBryan Schumaker 468365178db4SBryan Schumaker spin_lock(&recall_lock); 4684a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4685a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { 4686a6d88f29SStanislav Kinsbursky list_del(&dp->dl_recall_lru); 4687a6d88f29SStanislav Kinsbursky nfsd_break_one_deleg(dp); 4688a6d88f29SStanislav Kinsbursky } 468965178db4SBryan Schumaker spin_unlock(&recall_lock); 469065178db4SBryan Schumaker 469165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 469265178db4SBryan Schumaker } 469365178db4SBryan Schumaker 469465178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 469565178db4SBryan Schumaker 4696ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 46971da177e4SLinus Torvalds 469872083396SBryan Schumaker void 4699ac4d8ff2SNeilBrown nfs4_state_init(void) 47001da177e4SLinus Torvalds { 470172083396SBryan Schumaker int i; 47021da177e4SLinus Torvalds 47031da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47041da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 47051da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 47061da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 47071da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 470802cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 47091da177e4SLinus Torvalds } 47105282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 47115282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 47121da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 47131da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 47141da177e4SLinus Torvalds } 471516bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 471616bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 47171da177e4SLinus Torvalds } 4718009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4719009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 47201da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 47211da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 47221da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4723ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4724ac4d8ff2SNeilBrown } 4725ac4d8ff2SNeilBrown 4726c2f1a551SMeelap Shah /* 4727c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4728c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4729c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4730c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4731c2f1a551SMeelap Shah * 4732c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4733c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4734c2f1a551SMeelap Shah */ 4735c2f1a551SMeelap Shah static void 4736c2f1a551SMeelap Shah set_max_delegations(void) 4737c2f1a551SMeelap Shah { 4738c2f1a551SMeelap Shah /* 4739c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4740c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4741c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4742c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4743c2f1a551SMeelap Shah */ 4744c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4745c2f1a551SMeelap Shah } 4746c2f1a551SMeelap Shah 4747ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4748ac4d8ff2SNeilBrown 4749a6d6b781SJeff Layton int 4750a6d6b781SJeff Layton nfs4_state_start(void) 4751ac4d8ff2SNeilBrown { 47525e1533c7SStanislav Kinsbursky struct net *net = &init_net; 47535e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 4754b5a1a81eSJ. Bruce Fields int ret; 4755b5a1a81eSJ. Bruce Fields 47562a4317c5SJeff Layton /* 47572a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 47582a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 47592a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 47602a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 47612a4317c5SJeff Layton * basis. 47622a4317c5SJeff Layton */ 47635e1533c7SStanislav Kinsbursky get_net(net); 47645e1533c7SStanislav Kinsbursky nfsd4_client_tracking_init(net); 47652c142baaSStanislav Kinsbursky nn->boot_time = get_seconds(); 47665ccb0066SStanislav Kinsbursky locks_start_grace(net, &nn->nfsd4_manager); 4767a51c84edSStanislav Kinsbursky nn->grace_ended = false; 47689a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4769e46b498cSJ. Bruce Fields nfsd4_grace); 4770b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4771a6d6b781SJeff Layton if (ret) { 4772a6d6b781SJeff Layton ret = -ENOMEM; 4773a6d6b781SJeff Layton goto out_recovery; 4774a6d6b781SJeff Layton } 477558da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4776a6d6b781SJeff Layton if (laundry_wq == NULL) { 4777a6d6b781SJeff Layton ret = -ENOMEM; 4778a6d6b781SJeff Layton goto out_recovery; 4779a6d6b781SJeff Layton } 4780b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4781b5a1a81eSJ. Bruce Fields if (ret) 4782b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4783e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4784c2f1a551SMeelap Shah set_max_delegations(); 4785b5a1a81eSJ. Bruce Fields return 0; 4786b5a1a81eSJ. Bruce Fields out_free_laundry: 4787b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4788a6d6b781SJeff Layton out_recovery: 47895e1533c7SStanislav Kinsbursky nfsd4_client_tracking_exit(net); 47905e1533c7SStanislav Kinsbursky put_net(net); 4791b5a1a81eSJ. Bruce Fields return ret; 47921da177e4SLinus Torvalds } 47931da177e4SLinus Torvalds 47941da177e4SLinus Torvalds static void 47951da177e4SLinus Torvalds __nfs4_state_shutdown(void) 47961da177e4SLinus Torvalds { 47971da177e4SLinus Torvalds int i; 47981da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 47991da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 48001da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 48011da177e4SLinus Torvalds 48021da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 48031da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 48041da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 48050d22f68fSJ. Bruce Fields destroy_client(clp); 48061da177e4SLinus Torvalds } 48071da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 48081da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 48090d22f68fSJ. Bruce Fields destroy_client(clp); 48101da177e4SLinus Torvalds } 48111da177e4SLinus Torvalds } 48121da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 48131da177e4SLinus Torvalds spin_lock(&recall_lock); 48141da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 48151da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 48161da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 48171da177e4SLinus Torvalds } 48181da177e4SLinus Torvalds spin_unlock(&recall_lock); 48191da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 48201da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 48211da177e4SLinus Torvalds unhash_delegation(dp); 48221da177e4SLinus Torvalds } 48231da177e4SLinus Torvalds 48242a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 48252a4317c5SJeff Layton put_net(&init_net); 48261da177e4SLinus Torvalds } 48271da177e4SLinus Torvalds 48281da177e4SLinus Torvalds void 48291da177e4SLinus Torvalds nfs4_state_shutdown(void) 48301da177e4SLinus Torvalds { 48315e1533c7SStanislav Kinsbursky struct net *net = &init_net; 48325e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 48335e1533c7SStanislav Kinsbursky 4834afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 48355e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 48365e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 48371da177e4SLinus Torvalds nfs4_lock_state(); 48381da177e4SLinus Torvalds __nfs4_state_shutdown(); 48391da177e4SLinus Torvalds nfs4_unlock_state(); 4840c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 48411da177e4SLinus Torvalds } 48428b70484cSTigran Mkrtchyan 48438b70484cSTigran Mkrtchyan static void 48448b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 48458b70484cSTigran Mkrtchyan { 484637c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 484737c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 48488b70484cSTigran Mkrtchyan } 48498b70484cSTigran Mkrtchyan 48508b70484cSTigran Mkrtchyan static void 48518b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 48528b70484cSTigran Mkrtchyan { 485337c593c5STigran Mkrtchyan if (cstate->minorversion) { 485437c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 485537c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 485637c593c5STigran Mkrtchyan } 485737c593c5STigran Mkrtchyan } 485837c593c5STigran Mkrtchyan 485937c593c5STigran Mkrtchyan void 486037c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 486137c593c5STigran Mkrtchyan { 486237c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 48638b70484cSTigran Mkrtchyan } 48648b70484cSTigran Mkrtchyan 486562cd4a59STigran Mkrtchyan /* 486662cd4a59STigran Mkrtchyan * functions to set current state id 486762cd4a59STigran Mkrtchyan */ 48688b70484cSTigran Mkrtchyan void 48699428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48709428fe1aSTigran Mkrtchyan { 48719428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 48729428fe1aSTigran Mkrtchyan } 48739428fe1aSTigran Mkrtchyan 48749428fe1aSTigran Mkrtchyan void 48758b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 48768b70484cSTigran Mkrtchyan { 48778b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 48788b70484cSTigran Mkrtchyan } 48798b70484cSTigran Mkrtchyan 48808b70484cSTigran Mkrtchyan void 488162cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 488262cd4a59STigran Mkrtchyan { 488362cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 488462cd4a59STigran Mkrtchyan } 488562cd4a59STigran Mkrtchyan 488662cd4a59STigran Mkrtchyan void 488762cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 488862cd4a59STigran Mkrtchyan { 488962cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 489062cd4a59STigran Mkrtchyan } 489162cd4a59STigran Mkrtchyan 489262cd4a59STigran Mkrtchyan /* 489362cd4a59STigran Mkrtchyan * functions to consume current state id 489462cd4a59STigran Mkrtchyan */ 48951e97b519STigran Mkrtchyan 48961e97b519STigran Mkrtchyan void 48979428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48989428fe1aSTigran Mkrtchyan { 48999428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 49009428fe1aSTigran Mkrtchyan } 49019428fe1aSTigran Mkrtchyan 49029428fe1aSTigran Mkrtchyan void 49039428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 49049428fe1aSTigran Mkrtchyan { 49059428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 49069428fe1aSTigran Mkrtchyan } 49079428fe1aSTigran Mkrtchyan 49089428fe1aSTigran Mkrtchyan void 49091e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 49101e97b519STigran Mkrtchyan { 49111e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 49121e97b519STigran Mkrtchyan } 49131e97b519STigran Mkrtchyan 49141e97b519STigran Mkrtchyan void 49151e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 49161e97b519STigran Mkrtchyan { 49171e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 49181e97b519STigran Mkrtchyan } 49191e97b519STigran Mkrtchyan 492062cd4a59STigran Mkrtchyan void 49218b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 49228b70484cSTigran Mkrtchyan { 49238b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 49248b70484cSTigran Mkrtchyan } 49258b70484cSTigran Mkrtchyan 49268b70484cSTigran Mkrtchyan void 492762cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 49288b70484cSTigran Mkrtchyan { 492962cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 49308b70484cSTigran Mkrtchyan } 493130813e27STigran Mkrtchyan 493230813e27STigran Mkrtchyan void 493330813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 493430813e27STigran Mkrtchyan { 493530813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 493630813e27STigran Mkrtchyan } 493730813e27STigran Mkrtchyan 493830813e27STigran Mkrtchyan void 493930813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 494030813e27STigran Mkrtchyan { 494130813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 494230813e27STigran Mkrtchyan } 4943