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; 56fd39ca9aSNeilBrown static time_t boot_time; 57f32f3c2dSJ. Bruce Fields 58f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 59f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 60f32f3c2dSJ. Bruce Fields .si_generation = ~0, 61f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 62f32f3c2dSJ. Bruce Fields }; 63f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 64f32f3c2dSJ. Bruce Fields /* all fields zero */ 65f32f3c2dSJ. Bruce Fields }; 6619ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6719ff0f28STigran Mkrtchyan .si_generation = 1, 6819ff0f28STigran Mkrtchyan }; 69f32f3c2dSJ. Bruce Fields 70ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 71fd39ca9aSNeilBrown 72f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 73f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 7419ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds /* forward declarations */ 77fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 781da177e4SLinus Torvalds 798b671b80SJ. Bruce Fields /* Locking: */ 808b671b80SJ. Bruce Fields 818b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 82353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 831da177e4SLinus Torvalds 848b671b80SJ. Bruce Fields /* 858b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 868b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 878b671b80SJ. Bruce Fields * eventually cover more: 888b671b80SJ. Bruce Fields */ 898b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 908b671b80SJ. Bruce Fields 91fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 92fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 93e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 94e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 95e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 96e60d4398SNeilBrown 971da177e4SLinus Torvalds void 981da177e4SLinus Torvalds nfs4_lock_state(void) 991da177e4SLinus Torvalds { 100353ab6e9SIngo Molnar mutex_lock(&client_mutex); 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds 103508dc6e1SBenny Halevy static void free_session(struct kref *); 104508dc6e1SBenny Halevy 105508dc6e1SBenny Halevy /* Must be called under the client_lock */ 106508dc6e1SBenny Halevy static void nfsd4_put_session_locked(struct nfsd4_session *ses) 107508dc6e1SBenny Halevy { 108508dc6e1SBenny Halevy kref_put(&ses->se_ref, free_session); 109508dc6e1SBenny Halevy } 110508dc6e1SBenny Halevy 111508dc6e1SBenny Halevy static void nfsd4_get_session(struct nfsd4_session *ses) 112508dc6e1SBenny Halevy { 113508dc6e1SBenny Halevy kref_get(&ses->se_ref); 114508dc6e1SBenny Halevy } 115508dc6e1SBenny Halevy 1161da177e4SLinus Torvalds void 1171da177e4SLinus Torvalds nfs4_unlock_state(void) 1181da177e4SLinus Torvalds { 119353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1201da177e4SLinus Torvalds } 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds static inline u32 1231da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1241da177e4SLinus Torvalds { 1251da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds u32 x = 0; 1281da177e4SLinus Torvalds while (nbytes--) { 1291da177e4SLinus Torvalds x *= 37; 1301da177e4SLinus Torvalds x += *cptr++; 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds return x; 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds static struct list_head del_recall_lru; 1361da177e4SLinus Torvalds 13732513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 13832513b40SJ. Bruce Fields { 13932513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 14032513b40SJ. Bruce Fields } 14132513b40SJ. Bruce Fields 14213cd2184SNeilBrown static inline void 14313cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14413cd2184SNeilBrown { 1458b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1468b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1478b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1488b671b80SJ. Bruce Fields iput(fi->fi_inode); 14932513b40SJ. Bruce Fields nfsd4_free_file(fi); 1508b671b80SJ. Bruce Fields } 15113cd2184SNeilBrown } 15213cd2184SNeilBrown 15313cd2184SNeilBrown static inline void 15413cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 15513cd2184SNeilBrown { 1568b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 15713cd2184SNeilBrown } 15813cd2184SNeilBrown 159ef0f3390SNeilBrown static int num_delegations; 160c2f1a551SMeelap Shah unsigned int max_delegations; 161ef0f3390SNeilBrown 162ef0f3390SNeilBrown /* 163ef0f3390SNeilBrown * Open owner state (share locks) 164ef0f3390SNeilBrown */ 165ef0f3390SNeilBrown 16616bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 16716bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 16816bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 16916bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 170ef0f3390SNeilBrown 17116bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 172ddc04c41SJ. Bruce Fields { 173ddc04c41SJ. Bruce Fields unsigned int ret; 174ddc04c41SJ. Bruce Fields 175ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 176ddc04c41SJ. Bruce Fields ret += clientid; 17716bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 178ddc04c41SJ. Bruce Fields } 179ef0f3390SNeilBrown 18016bfdaafSJ. Bruce Fields static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 181ef0f3390SNeilBrown 182ef0f3390SNeilBrown /* hash table for nfs4_file */ 183ef0f3390SNeilBrown #define FILE_HASH_BITS 8 184ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 18535079582SShan Wei 186ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 187ddc04c41SJ. Bruce Fields { 188ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 189ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 190ddc04c41SJ. Bruce Fields } 191ddc04c41SJ. Bruce Fields 192ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 193ef0f3390SNeilBrown 194998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 195f9d7562fSJ. Bruce Fields { 196f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 197f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 198f9d7562fSJ. Bruce Fields } 199f9d7562fSJ. Bruce Fields 200998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 201998db52cSJ. Bruce Fields { 202998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 203998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 204998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 205998db52cSJ. Bruce Fields } else 206998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 207998db52cSJ. Bruce Fields } 208998db52cSJ. Bruce Fields 209998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 210f9d7562fSJ. Bruce Fields { 211f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 212f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 213f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 214f9d7562fSJ. Bruce Fields } 215f9d7562fSJ. Bruce Fields } 216f9d7562fSJ. Bruce Fields 217998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 218f9d7562fSJ. Bruce Fields { 219f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 220f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 2213d02fa29SJ. Bruce Fields /* 2223d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 2233d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 2243d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 2253d02fa29SJ. Bruce Fields */ 2263d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 2273d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 2283d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 229f9d7562fSJ. Bruce Fields } 230f9d7562fSJ. Bruce Fields } 231f9d7562fSJ. Bruce Fields 232998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 233998db52cSJ. Bruce Fields { 234998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 235998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 236998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 237998db52cSJ. Bruce Fields } else 238998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 239998db52cSJ. Bruce Fields } 240998db52cSJ. Bruce Fields 2416136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 24236d44c60SJ. Bruce Fields { 2436136d2b4SJ. Bruce Fields static int min_stateid = 0; 24438c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2456136d2b4SJ. Bruce Fields int new_stid; 2466136d2b4SJ. Bruce Fields int error; 24736d44c60SJ. Bruce Fields 24838c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2496136d2b4SJ. Bruce Fields /* 250996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 251996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 252996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 253996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2546136d2b4SJ. Bruce Fields */ 2556136d2b4SJ. Bruce Fields BUG_ON(error); 2566136d2b4SJ. Bruce Fields /* 2576136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2586136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2596136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2606136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2616136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2626136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2636136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2646136d2b4SJ. Bruce Fields */ 2656136d2b4SJ. Bruce Fields 2666136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2676136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2686136d2b4SJ. Bruce Fields min_stateid = 0; 2696136d2b4SJ. Bruce Fields return new_stid; 27036d44c60SJ. Bruce Fields } 27136d44c60SJ. Bruce Fields 272996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2732a74aba7SJ. Bruce Fields { 2742a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2756136d2b4SJ. Bruce Fields int new_id; 2762a74aba7SJ. Bruce Fields 2772a74aba7SJ. Bruce Fields stid->sc_type = type; 2782a74aba7SJ. Bruce Fields stid->sc_client = cl; 2792a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2806136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2816136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2822a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2832a74aba7SJ. Bruce Fields s->si_generation = 0; 284996e0938SJ. Bruce Fields } 285996e0938SJ. Bruce Fields 286996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 287996e0938SJ. Bruce Fields { 288996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 289996e0938SJ. Bruce Fields 290996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 291996e0938SJ. Bruce Fields return NULL; 292996e0938SJ. Bruce Fields /* 293996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 294996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 295996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 296996e0938SJ. Bruce Fields * preallocated entries. 297996e0938SJ. Bruce Fields */ 298996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2992a74aba7SJ. Bruce Fields } 3002a74aba7SJ. Bruce Fields 3014cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 3024cdc951bSJ. Bruce Fields { 3034cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 3044cdc951bSJ. Bruce Fields } 3054cdc951bSJ. Bruce Fields 3061da177e4SLinus Torvalds static struct nfs4_delegation * 307dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 3081da177e4SLinus Torvalds { 3091da177e4SLinus Torvalds struct nfs4_delegation *dp; 3101da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 313c3e48080SJ. Bruce Fields /* 314c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 315c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 316c3e48080SJ. Bruce Fields * write delegations properly. 317c3e48080SJ. Bruce Fields */ 318c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 319c3e48080SJ. Bruce Fields return NULL; 32047f9940cSMeelap Shah if (fp->fi_had_conflict) 32147f9940cSMeelap Shah return NULL; 322c2f1a551SMeelap Shah if (num_delegations > max_delegations) 323ef0f3390SNeilBrown return NULL; 324996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 3255b2d21c1SNeilBrown if (dp == NULL) 3261da177e4SLinus Torvalds return dp; 327996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 3282a74aba7SJ. Bruce Fields /* 3292a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3306136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3316136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3322a74aba7SJ. Bruce Fields */ 3332a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 334ef0f3390SNeilBrown num_delegations++; 335ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 336ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3371da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 33813cd2184SNeilBrown get_nfs4_file(fp); 3391da177e4SLinus Torvalds dp->dl_file = fp; 3401da177e4SLinus Torvalds dp->dl_type = type; 3416c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3421da177e4SLinus Torvalds dp->dl_time = 0; 3431da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 344b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 3451da177e4SLinus Torvalds return dp; 3461da177e4SLinus Torvalds } 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds void 3491da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3501da177e4SLinus Torvalds { 3511da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3521da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 35313cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3545b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 355ef0f3390SNeilBrown num_delegations--; 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds 359acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3601da177e4SLinus Torvalds { 361acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 362acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 363acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3644ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 365acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 366acfdf5c3SJ. Bruce Fields } 3671da177e4SLinus Torvalds } 3681da177e4SLinus Torvalds 3696136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3706136d2b4SJ. Bruce Fields { 37138c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 37238c2f4b1SJ. Bruce Fields 37338c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3746136d2b4SJ. Bruce Fields } 3756136d2b4SJ. Bruce Fields 3761da177e4SLinus Torvalds /* Called under the state lock. */ 3771da177e4SLinus Torvalds static void 3781da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3791da177e4SLinus Torvalds { 3806136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 381ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3821da177e4SLinus Torvalds spin_lock(&recall_lock); 3835d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3841da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3851da177e4SLinus Torvalds spin_unlock(&recall_lock); 386acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3871da177e4SLinus Torvalds nfs4_put_delegation(dp); 3881da177e4SLinus Torvalds } 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds /* 3911da177e4SLinus Torvalds * SETCLIENTID state 3921da177e4SLinus Torvalds */ 3931da177e4SLinus Torvalds 39436acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3959089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3969089f1b4SBenny Halevy 3971da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3981da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3991da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 4001da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 4011da177e4SLinus Torvalds 402ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 403ddc04c41SJ. Bruce Fields { 404ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 405ddc04c41SJ. Bruce Fields } 406ddc04c41SJ. Bruce Fields 407ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 408ddc04c41SJ. Bruce Fields { 409ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 410ddc04c41SJ. Bruce Fields } 411ddc04c41SJ. Bruce Fields 4121da177e4SLinus Torvalds /* 4131da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 4141da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 4151da177e4SLinus Torvalds * 4161da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 4171da177e4SLinus Torvalds * setclientid_confirmed info. 4181da177e4SLinus Torvalds * 4191da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 4201da177e4SLinus Torvalds * setclientid info. 4211da177e4SLinus Torvalds * 4221da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 4231da177e4SLinus Torvalds * for lease renewal. 4241da177e4SLinus Torvalds * 4251da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 4261da177e4SLinus Torvalds * for last close replay. 4271da177e4SLinus Torvalds */ 4281da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 4291da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 4301da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 4311da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 4321da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 4331da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 4341da177e4SLinus Torvalds static struct list_head client_lru; 4351da177e4SLinus Torvalds static struct list_head close_lru; 4361da177e4SLinus Torvalds 437f9d7562fSJ. Bruce Fields /* 438f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 439f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 440f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 441f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 442f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 443f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 444f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 445f9d7562fSJ. Bruce Fields * 446f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 447f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 448f9d7562fSJ. Bruce Fields * 449f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 450f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 451f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 452f9d7562fSJ. Bruce Fields * 453f9d7562fSJ. Bruce Fields * which we should reject. 454f9d7562fSJ. Bruce Fields */ 4555ae037e5SJeff Layton static unsigned int 4565ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 457f9d7562fSJ. Bruce Fields int i; 4585ae037e5SJeff Layton unsigned int access = 0; 459f9d7562fSJ. Bruce Fields 460f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 461f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 4625ae037e5SJeff Layton access |= i; 463f9d7562fSJ. Bruce Fields } 4645ae037e5SJeff Layton return access; 465f9d7562fSJ. Bruce Fields } 466f9d7562fSJ. Bruce Fields 4673a328614SJeff Layton static bool 468dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 469f9d7562fSJ. Bruce Fields unsigned int access, deny; 470f9d7562fSJ. Bruce Fields 4715ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 4725ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 473f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 4743a328614SJeff Layton return false; 4753a328614SJeff Layton return true; 476f9d7562fSJ. Bruce Fields } 477f9d7562fSJ. Bruce Fields 47882c5ff1bSJeff Layton /* set share access for a given stateid */ 47982c5ff1bSJeff Layton static inline void 48082c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 48182c5ff1bSJeff Layton { 48282c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 48382c5ff1bSJeff Layton } 48482c5ff1bSJeff Layton 48582c5ff1bSJeff Layton /* clear share access for a given stateid */ 48682c5ff1bSJeff Layton static inline void 48782c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 48882c5ff1bSJeff Layton { 48982c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 49082c5ff1bSJeff Layton } 49182c5ff1bSJeff Layton 49282c5ff1bSJeff Layton /* test whether a given stateid has access */ 49382c5ff1bSJeff Layton static inline bool 49482c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 49582c5ff1bSJeff Layton { 49682c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 49782c5ff1bSJeff Layton } 49882c5ff1bSJeff Layton 499ce0fc43cSJeff Layton /* set share deny for a given stateid */ 500ce0fc43cSJeff Layton static inline void 501ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 502ce0fc43cSJeff Layton { 503ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 504ce0fc43cSJeff Layton } 505ce0fc43cSJeff Layton 506ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 507ce0fc43cSJeff Layton static inline void 508ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 509ce0fc43cSJeff Layton { 510ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 511ce0fc43cSJeff Layton } 512ce0fc43cSJeff Layton 513ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 514ce0fc43cSJeff Layton static inline bool 515ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 516ce0fc43cSJeff Layton { 517ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 518f9d7562fSJ. Bruce Fields } 519f9d7562fSJ. Bruce Fields 520f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 521f9d7562fSJ. Bruce Fields { 5228f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 523f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 524f9d7562fSJ. Bruce Fields return O_RDONLY; 525f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 526f9d7562fSJ. Bruce Fields return O_WRONLY; 527f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 528f9d7562fSJ. Bruce Fields return O_RDWR; 529f9d7562fSJ. Bruce Fields } 530f9d7562fSJ. Bruce Fields BUG(); 531f9d7562fSJ. Bruce Fields } 532f9d7562fSJ. Bruce Fields 53382c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 53482c5ff1bSJeff Layton static void 53582c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 53682c5ff1bSJeff Layton { 53782c5ff1bSJeff Layton int i; 53882c5ff1bSJeff Layton 53982c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 54082c5ff1bSJeff Layton if (test_access(i, stp)) 54182c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 54282c5ff1bSJeff Layton nfs4_access_to_omode(i)); 54382c5ff1bSJeff Layton clear_access(i, stp); 54482c5ff1bSJeff Layton } 54582c5ff1bSJeff Layton } 54682c5ff1bSJeff Layton 547dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 548529d7b2aSJ. Bruce Fields { 549529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 550529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 551529d7b2aSJ. Bruce Fields } 552529d7b2aSJ. Bruce Fields 553dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 554529d7b2aSJ. Bruce Fields { 55582c5ff1bSJeff Layton release_all_access(stp); 556a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5574665e2baSJ. Bruce Fields stp->st_file = NULL; 5584665e2baSJ. Bruce Fields } 5594665e2baSJ. Bruce Fields 560dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5614665e2baSJ. Bruce Fields { 562529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 563529d7b2aSJ. Bruce Fields } 564529d7b2aSJ. Bruce Fields 565dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 566529d7b2aSJ. Bruce Fields { 567529d7b2aSJ. Bruce Fields struct file *file; 568529d7b2aSJ. Bruce Fields 569529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5706136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 571529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 572529d7b2aSJ. Bruce Fields if (file) 573fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 57438c387b5SJ. Bruce Fields close_generic_stateid(stp); 575529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 576529d7b2aSJ. Bruce Fields } 577529d7b2aSJ. Bruce Fields 578fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 579529d7b2aSJ. Bruce Fields { 580dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 581529d7b2aSJ. Bruce Fields 582fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 583fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 584009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 585fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 586fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 587dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 588529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 589529d7b2aSJ. Bruce Fields } 590529d7b2aSJ. Bruce Fields } 591529d7b2aSJ. Bruce Fields 592fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 593529d7b2aSJ. Bruce Fields { 594fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 595fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 596529d7b2aSJ. Bruce Fields } 597529d7b2aSJ. Bruce Fields 598529d7b2aSJ. Bruce Fields static void 599dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 600529d7b2aSJ. Bruce Fields { 601fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 602529d7b2aSJ. Bruce Fields 603529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 604fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 605fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 606fe0750e5SJ. Bruce Fields release_lockowner(lo); 607529d7b2aSJ. Bruce Fields } 608529d7b2aSJ. Bruce Fields } 609529d7b2aSJ. Bruce Fields 61038c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 6112283963fSJ. Bruce Fields { 6122283963fSJ. Bruce Fields unhash_generic_stateid(stp); 6132283963fSJ. Bruce Fields release_stateid_lockowners(stp); 61438c387b5SJ. Bruce Fields close_generic_stateid(stp); 61538c387b5SJ. Bruce Fields } 61638c387b5SJ. Bruce Fields 61738c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 61838c387b5SJ. Bruce Fields { 61938c387b5SJ. Bruce Fields unhash_open_stateid(stp); 6206136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 6212283963fSJ. Bruce Fields free_generic_stateid(stp); 6222283963fSJ. Bruce Fields } 6232283963fSJ. Bruce Fields 624fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 625f1d110caSJ. Bruce Fields { 626dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 627f1d110caSJ. Bruce Fields 628fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 629fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 630fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 631fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 632dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 633f1d110caSJ. Bruce Fields release_open_stateid(stp); 634f1d110caSJ. Bruce Fields } 635f1d110caSJ. Bruce Fields } 636f1d110caSJ. Bruce Fields 637f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 638f7a4d872SJ. Bruce Fields { 639f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 640f7a4d872SJ. Bruce Fields 641f7a4d872SJ. Bruce Fields if (s) { 6426136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 643f7a4d872SJ. Bruce Fields free_generic_stateid(s); 644f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 645f7a4d872SJ. Bruce Fields } 646f7a4d872SJ. Bruce Fields } 647f7a4d872SJ. Bruce Fields 648fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 649f1d110caSJ. Bruce Fields { 650fe0750e5SJ. Bruce Fields unhash_openowner(oo); 651fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 652f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 653fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 654f1d110caSJ. Bruce Fields } 655f1d110caSJ. Bruce Fields 6565282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6575282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6585282fd72SMarc Eshel 6595282fd72SMarc Eshel static inline int 6605282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6615282fd72SMarc Eshel { 6625282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6635282fd72SMarc Eshel 6645282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6655282fd72SMarc Eshel } 6665282fd72SMarc Eshel 6678f199b82STrond Myklebust #ifdef NFSD_DEBUG 6685282fd72SMarc Eshel static inline void 6695282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6705282fd72SMarc Eshel { 6715282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6725282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6735282fd72SMarc Eshel } 6748f199b82STrond Myklebust #else 6758f199b82STrond Myklebust static inline void 6768f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6778f199b82STrond Myklebust { 6788f199b82STrond Myklebust } 6798f199b82STrond Myklebust #endif 6808f199b82STrond Myklebust 6815282fd72SMarc Eshel 682ec6b5d7bSAndy Adamson static void 683ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 684ec6b5d7bSAndy Adamson { 685ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 686ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 687ec6b5d7bSAndy Adamson 688ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 689ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 690ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 691ec6b5d7bSAndy Adamson sid->reserved = 0; 692ec6b5d7bSAndy Adamson } 693ec6b5d7bSAndy Adamson 694ec6b5d7bSAndy Adamson /* 695a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 696a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 697a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 698a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 699a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 700a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 701a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 702a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 703a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 704a649637cSAndy Adamson * for the SEQUENCE op response: 705ec6b5d7bSAndy Adamson */ 706a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 707a649637cSAndy Adamson 708557ce264SAndy Adamson static void 709557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 710557ce264SAndy Adamson { 711557ce264SAndy Adamson int i; 712557ce264SAndy Adamson 713557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 714557ce264SAndy Adamson kfree(ses->se_slots[i]); 715557ce264SAndy Adamson } 716557ce264SAndy Adamson 717efe0cb6dSJ. Bruce Fields /* 718efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 719efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 720efe0cb6dSJ. Bruce Fields */ 721efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 722efe0cb6dSJ. Bruce Fields { 723efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 724efe0cb6dSJ. Bruce Fields } 725efe0cb6dSJ. Bruce Fields 7265b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 727ec6b5d7bSAndy Adamson { 7285b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 7295b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 730ec6b5d7bSAndy Adamson 7315b6feee9SJ. Bruce Fields return size; 732557ce264SAndy Adamson } 733557ce264SAndy Adamson 7345b6feee9SJ. Bruce Fields /* 7355b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 7365b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 73742b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 7385b6feee9SJ. Bruce Fields */ 7395b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 7405b6feee9SJ. Bruce Fields { 7415b6feee9SJ. Bruce Fields int avail; 7425b6feee9SJ. Bruce Fields 7435b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7445b6feee9SJ. Bruce Fields 7455b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7465b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7475b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7485b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7495b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7505b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7515b6feee9SJ. Bruce Fields 7525b6feee9SJ. Bruce Fields return num; 7535b6feee9SJ. Bruce Fields } 7545b6feee9SJ. Bruce Fields 7555b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7565b6feee9SJ. Bruce Fields { 7575b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7585b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7595b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7605b6feee9SJ. Bruce Fields } 7615b6feee9SJ. Bruce Fields 7625b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 7635b6feee9SJ. Bruce Fields { 7645b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7655b6feee9SJ. Bruce Fields int mem, i; 766ec6b5d7bSAndy Adamson 767c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 768ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7695b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 770ec6b5d7bSAndy Adamson 7715b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7726c18ba9fSAlexandros Batsakis if (!new) 7735b6feee9SJ. Bruce Fields return NULL; 774ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7755b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7765b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7775b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7785b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 779ec6b5d7bSAndy Adamson goto out_free; 780ec6b5d7bSAndy Adamson } 7815b6feee9SJ. Bruce Fields return new; 7825b6feee9SJ. Bruce Fields out_free: 7835b6feee9SJ. Bruce Fields while (i--) 7845b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7855b6feee9SJ. Bruce Fields kfree(new); 7865b6feee9SJ. Bruce Fields return NULL; 7875b6feee9SJ. Bruce Fields } 7885b6feee9SJ. Bruce Fields 7895b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7905b6feee9SJ. Bruce Fields { 7915b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7925b6feee9SJ. Bruce Fields 7935b6feee9SJ. Bruce Fields new->maxreqs = numslots; 794d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 795d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7965b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7975b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7985b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7995b6feee9SJ. Bruce Fields } 8005b6feee9SJ. Bruce Fields 80119cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 80219cf5c02SJ. Bruce Fields { 80319cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 80419cf5c02SJ. Bruce Fields kfree(c); 80519cf5c02SJ. Bruce Fields } 80619cf5c02SJ. Bruce Fields 80719cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 80819cf5c02SJ. Bruce Fields { 80919cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 81019cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 81119cf5c02SJ. Bruce Fields 81219cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 81319cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 81419cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 81519cf5c02SJ. Bruce Fields free_conn(c); 81619cf5c02SJ. Bruce Fields } 81719cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 818eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 81919cf5c02SJ. Bruce Fields } 82019cf5c02SJ. Bruce Fields 821d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 822c7662518SJ. Bruce Fields { 823c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 824c7662518SJ. Bruce Fields 825c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 826c7662518SJ. Bruce Fields if (!conn) 827db90681dSJ. Bruce Fields return NULL; 828c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 829c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 830d29c374cSJ. Bruce Fields conn->cn_flags = flags; 831db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 832db90681dSJ. Bruce Fields return conn; 833db90681dSJ. Bruce Fields } 834db90681dSJ. Bruce Fields 835328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 836328ead28SJ. Bruce Fields { 837328ead28SJ. Bruce Fields conn->cn_session = ses; 838328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 839328ead28SJ. Bruce Fields } 840328ead28SJ. Bruce Fields 841db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 842db90681dSJ. Bruce Fields { 843db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 844c7662518SJ. Bruce Fields 845c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 846328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 847c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 848db90681dSJ. Bruce Fields } 849c7662518SJ. Bruce Fields 85021b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 851db90681dSJ. Bruce Fields { 85219cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 85321b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 854db90681dSJ. Bruce Fields } 855db90681dSJ. Bruce Fields 8561d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 857db90681dSJ. Bruce Fields { 858db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 85921b75b01SJ. Bruce Fields int ret; 860db90681dSJ. Bruce Fields 8611d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 862db90681dSJ. Bruce Fields if (!conn) 863db90681dSJ. Bruce Fields return nfserr_jukebox; 864db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 86521b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 86621b75b01SJ. Bruce Fields if (ret) 86721b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 86821b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 86924119673SWeston Andros Adamson if (ses->se_client->cl_cb_state == NFSD4_CB_DOWN && 87024119673SWeston Andros Adamson dir & NFS4_CDFC4_BACK) { 87124119673SWeston Andros Adamson /* callback channel may be back up */ 87224119673SWeston Andros Adamson nfsd4_probe_callback(ses->se_client); 87324119673SWeston Andros Adamson } 874c7662518SJ. Bruce Fields return nfs_ok; 875c7662518SJ. Bruce Fields } 876c7662518SJ. Bruce Fields 8771d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 8781d1bc8f2SJ. Bruce Fields { 8791d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8801d1bc8f2SJ. Bruce Fields 8811d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 8821d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 8831d1bc8f2SJ. Bruce Fields 8841d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 8851d1bc8f2SJ. Bruce Fields } 8861d1bc8f2SJ. Bruce Fields 8871d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 88819cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 889c7662518SJ. Bruce Fields { 89019cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 89119cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 89219cf5c02SJ. Bruce Fields 89319cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 89419cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 89519cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 89619cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 89719cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 89819cf5c02SJ. Bruce Fields 89919cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 90019cf5c02SJ. Bruce Fields free_conn(c); 90119cf5c02SJ. Bruce Fields 90219cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 90319cf5c02SJ. Bruce Fields } 90419cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 905c7662518SJ. Bruce Fields } 906c7662518SJ. Bruce Fields 907508dc6e1SBenny Halevy static void free_session(struct kref *kref) 908c7662518SJ. Bruce Fields { 909c7662518SJ. Bruce Fields struct nfsd4_session *ses; 910c7662518SJ. Bruce Fields int mem; 911c7662518SJ. Bruce Fields 912bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 913c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 91419cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 915c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 916c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 917c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 918c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 919c7662518SJ. Bruce Fields free_session_slots(ses); 920c7662518SJ. Bruce Fields kfree(ses); 921c7662518SJ. Bruce Fields } 922c7662518SJ. Bruce Fields 923508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 924508dc6e1SBenny Halevy { 925508dc6e1SBenny Halevy spin_lock(&client_lock); 926508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 927508dc6e1SBenny Halevy spin_unlock(&client_lock); 928508dc6e1SBenny Halevy } 929508dc6e1SBenny Halevy 930ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 9315b6feee9SJ. Bruce Fields { 9325b6feee9SJ. Bruce Fields struct nfsd4_session *new; 9335b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 9345b6feee9SJ. Bruce Fields int numslots, slotsize; 93557b7b43bSJ. Bruce Fields __be32 status; 9365b6feee9SJ. Bruce Fields int idx; 9375b6feee9SJ. Bruce Fields 9385b6feee9SJ. Bruce Fields /* 9395b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 9405b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 9415b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 9425b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 9435b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 9445b6feee9SJ. Bruce Fields */ 9455b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 9465b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 947ced6dfe9SMi Jinlong if (numslots < 1) 948ced6dfe9SMi Jinlong return NULL; 9495b6feee9SJ. Bruce Fields 9505b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 9515b6feee9SJ. Bruce Fields if (!new) { 9525b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 953ac7c46f2SJ. Bruce Fields return NULL; 9545b6feee9SJ. Bruce Fields } 9555b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 956ec6b5d7bSAndy Adamson 957ec6b5d7bSAndy Adamson new->se_client = clp; 958ec6b5d7bSAndy Adamson gen_sessionid(new); 959ec6b5d7bSAndy Adamson 960c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 961c7662518SJ. Bruce Fields 962ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 963ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9648b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 965ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9665b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9679089f1b4SBenny Halevy spin_lock(&client_lock); 968ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9694c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 970ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9714c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9729089f1b4SBenny Halevy spin_unlock(&client_lock); 973ec6b5d7bSAndy Adamson 9741d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 975ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 976c7662518SJ. Bruce Fields if (status) { 977508dc6e1SBenny Halevy spin_lock(&client_lock); 978c7662518SJ. Bruce Fields free_session(&new->se_ref); 979508dc6e1SBenny Halevy spin_unlock(&client_lock); 980ac7c46f2SJ. Bruce Fields return NULL; 981c7662518SJ. Bruce Fields } 982dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 983edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 984dcbeaa68SJ. Bruce Fields /* 985dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 986dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 987dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 988dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 989dcbeaa68SJ. Bruce Fields * future: 990dcbeaa68SJ. Bruce Fields */ 991edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 992edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 993edd76786SJ. Bruce Fields } 994dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 995ac7c46f2SJ. Bruce Fields return new; 996ec6b5d7bSAndy Adamson } 997ec6b5d7bSAndy Adamson 9989089f1b4SBenny Halevy /* caller must hold client_lock */ 9995282fd72SMarc Eshel static struct nfsd4_session * 10005282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 10015282fd72SMarc Eshel { 10025282fd72SMarc Eshel struct nfsd4_session *elem; 10035282fd72SMarc Eshel int idx; 10045282fd72SMarc Eshel 10055282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 10065282fd72SMarc Eshel idx = hash_sessionid(sessionid); 10075282fd72SMarc Eshel /* Search in the appropriate list */ 10085282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 10095282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 10105282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 10115282fd72SMarc Eshel return elem; 10125282fd72SMarc Eshel } 10135282fd72SMarc Eshel } 10145282fd72SMarc Eshel 10155282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 10165282fd72SMarc Eshel return NULL; 10175282fd72SMarc Eshel } 10185282fd72SMarc Eshel 10199089f1b4SBenny Halevy /* caller must hold client_lock */ 10207116ed6bSAndy Adamson static void 10215282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 10227116ed6bSAndy Adamson { 10237116ed6bSAndy Adamson list_del(&ses->se_hash); 10244c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 10257116ed6bSAndy Adamson list_del(&ses->se_perclnt); 10264c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 10275282fd72SMarc Eshel } 10285282fd72SMarc Eshel 102936acb66bSBenny Halevy /* must be called under the client_lock */ 10301da177e4SLinus Torvalds static inline void 103136acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 10321da177e4SLinus Torvalds { 103307cd4909SBenny Halevy if (is_client_expired(clp)) { 10347447758bSJ. Bruce Fields WARN_ON(1); 10357447758bSJ. Bruce Fields printk("%s: client (clientid %08x/%08x) already expired\n", 103607cd4909SBenny Halevy __func__, 103707cd4909SBenny Halevy clp->cl_clientid.cl_boot, 103807cd4909SBenny Halevy clp->cl_clientid.cl_id); 103907cd4909SBenny Halevy return; 104007cd4909SBenny Halevy } 104107cd4909SBenny Halevy 10421da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 10431da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 10441da177e4SLinus Torvalds clp->cl_clientid.cl_id); 10451da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 10461da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10471da177e4SLinus Torvalds } 10481da177e4SLinus Torvalds 104936acb66bSBenny Halevy static inline void 105036acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 105136acb66bSBenny Halevy { 105236acb66bSBenny Halevy spin_lock(&client_lock); 105336acb66bSBenny Halevy renew_client_locked(clp); 105436acb66bSBenny Halevy spin_unlock(&client_lock); 105536acb66bSBenny Halevy } 105636acb66bSBenny Halevy 10571da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10581da177e4SLinus Torvalds static int 10591da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 10601da177e4SLinus Torvalds { 10611da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 10621da177e4SLinus Torvalds return 0; 106360adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 106460adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 10651da177e4SLinus Torvalds return 1; 10661da177e4SLinus Torvalds } 10671da177e4SLinus Torvalds 10681da177e4SLinus Torvalds /* 10691da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10701da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10711da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10721da177e4SLinus Torvalds */ 107335bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10741da177e4SLinus Torvalds { 10751da177e4SLinus Torvalds struct nfs4_client *clp; 10761da177e4SLinus Torvalds 107735bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 107835bba9a3SJ. Bruce Fields if (clp == NULL) 107935bba9a3SJ. Bruce Fields return NULL; 108067114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 108135bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 108235bba9a3SJ. Bruce Fields kfree(clp); 108335bba9a3SJ. Bruce Fields return NULL; 108435bba9a3SJ. Bruce Fields } 10851da177e4SLinus Torvalds clp->cl_name.len = name.len; 10861da177e4SLinus Torvalds return clp; 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds static inline void 10901da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10911da177e4SLinus Torvalds { 1092bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 1093792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1094792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1095792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1096792c95ddSJ. Bruce Fields se_perclnt); 1097792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1098508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1099792c95ddSJ. Bruce Fields } 110003a4e1f6SJ. Bruce Fields free_svc_cred(&clp->cl_cred); 11011da177e4SLinus Torvalds kfree(clp->cl_name.data); 11021da177e4SLinus Torvalds kfree(clp); 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 1105d7682988SBenny Halevy void 1106d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1107d7682988SBenny Halevy { 1108d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1109d7682988SBenny Halevy 1110d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1111d7682988SBenny Halevy return; 1112d7682988SBenny Halevy if (is_client_expired(clp)) { 1113d7682988SBenny Halevy free_client(clp); 1114d7682988SBenny Halevy session->se_client = NULL; 1115d7682988SBenny Halevy } else 1116d7682988SBenny Halevy renew_client_locked(clp); 1117d7682988SBenny Halevy spin_unlock(&client_lock); 1118d7682988SBenny Halevy } 1119d7682988SBenny Halevy 112084d38ac9SBenny Halevy /* must be called under the client_lock */ 112184d38ac9SBenny Halevy static inline void 112284d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 112384d38ac9SBenny Halevy { 1124792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1125792c95ddSJ. Bruce Fields 112607cd4909SBenny Halevy mark_client_expired(clp); 112784d38ac9SBenny Halevy list_del(&clp->cl_lru); 11284c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1129792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1130792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 11314c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 113284d38ac9SBenny Halevy } 113384d38ac9SBenny Halevy 11341da177e4SLinus Torvalds static void 11351da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 11361da177e4SLinus Torvalds { 1137fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 11381da177e4SLinus Torvalds struct nfs4_delegation *dp; 11391da177e4SLinus Torvalds struct list_head reaplist; 11401da177e4SLinus Torvalds 11411da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 11421da177e4SLinus Torvalds spin_lock(&recall_lock); 1143ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1144ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1145ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11461da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11471da177e4SLinus Torvalds } 11481da177e4SLinus Torvalds spin_unlock(&recall_lock); 11491da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11501da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11511da177e4SLinus Torvalds unhash_delegation(dp); 11521da177e4SLinus Torvalds } 1153ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1154fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1155fe0750e5SJ. Bruce Fields release_openowner(oo); 11561da177e4SLinus Torvalds } 11576ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11582bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11592bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 116084d38ac9SBenny Halevy list_del(&clp->cl_idhash); 116184d38ac9SBenny Halevy list_del(&clp->cl_strhash); 116284d38ac9SBenny Halevy spin_lock(&client_lock); 116384d38ac9SBenny Halevy unhash_client_locked(clp); 116446583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1165b12a05cbSJ. Bruce Fields free_client(clp); 116646583e25SBenny Halevy spin_unlock(&client_lock); 11671da177e4SLinus Torvalds } 11681da177e4SLinus Torvalds 116935bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 117035bba9a3SJ. Bruce Fields { 117135bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 117235bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11731da177e4SLinus Torvalds } 11741da177e4SLinus Torvalds 117535bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 117635bba9a3SJ. Bruce Fields { 11771da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11781da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 118103a4e1f6SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 118235bba9a3SJ. Bruce Fields { 118303a4e1f6SJ. Bruce Fields if (source->cr_principal) { 118403a4e1f6SJ. Bruce Fields target->cr_principal = 118503a4e1f6SJ. Bruce Fields kstrdup(source->cr_principal, GFP_KERNEL); 118603a4e1f6SJ. Bruce Fields if (target->cr_principal == NULL) 118703a4e1f6SJ. Bruce Fields return -ENOMEM; 118803a4e1f6SJ. Bruce Fields } else 118903a4e1f6SJ. Bruce Fields target->cr_principal = NULL; 1190d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 11911da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11921da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11931da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11941da177e4SLinus Torvalds get_group_info(target->cr_group_info); 119503a4e1f6SJ. Bruce Fields return 0; 11961da177e4SLinus Torvalds } 11971da177e4SLinus Torvalds 119835bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1199599e0a22SJ. Bruce Fields { 1200a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds 12031da177e4SLinus Torvalds static int 1204599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1205599e0a22SJ. Bruce Fields { 1206599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 12071da177e4SLinus Torvalds } 12081da177e4SLinus Torvalds 12091da177e4SLinus Torvalds static int 1210599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1211599e0a22SJ. Bruce Fields { 1212599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds 12158fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 12168fbba96eSJ. Bruce Fields { 12178fbba96eSJ. Bruce Fields int i; 12188fbba96eSJ. Bruce Fields 12198fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 12208fbba96eSJ. Bruce Fields return false; 12218fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 12228fbba96eSJ. Bruce Fields if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) 12238fbba96eSJ. Bruce Fields return false; 12248fbba96eSJ. Bruce Fields return true; 12258fbba96eSJ. Bruce Fields } 12268fbba96eSJ. Bruce Fields 12275559b50aSVivek Trivedi static bool 1228599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1229599e0a22SJ. Bruce Fields { 1230d5497fc6SJ. Bruce Fields if ((cr1->cr_flavor != cr2->cr_flavor) 1231d5497fc6SJ. Bruce Fields || (cr1->cr_uid != cr2->cr_uid) 12328fbba96eSJ. Bruce Fields || (cr1->cr_gid != cr2->cr_gid) 12338fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 12348fbba96eSJ. Bruce Fields return false; 12358fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 12368fbba96eSJ. Bruce Fields return true; 12378fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 12388fbba96eSJ. Bruce Fields return false; 12395559b50aSVivek Trivedi return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); 12401da177e4SLinus Torvalds } 12411da177e4SLinus Torvalds 12425ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 12435ec7b46cSJ. Bruce Fields { 12445ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 12455ec7b46cSJ. Bruce Fields 12461da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 12471da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 1250deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1251deda2faaSJ. Bruce Fields { 1252ab4684d1SChuck Lever __be32 verf[2]; 1253deda2faaSJ. Bruce Fields static u32 i; 12541da177e4SLinus Torvalds 1255ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1256ab4684d1SChuck Lever verf[1] = (__be32)i++; 1257ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds 126038c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 12614581d140SJ. Bruce Fields { 126238c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 12634581d140SJ. Bruce Fields } 12644d71ab87SJ. Bruce Fields 126538c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1266f459e453SJ. Bruce Fields { 1267f459e453SJ. Bruce Fields struct nfs4_stid *s; 1268f459e453SJ. Bruce Fields 126938c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1270f459e453SJ. Bruce Fields if (!s) 1271f459e453SJ. Bruce Fields return NULL; 1272f459e453SJ. Bruce Fields if (typemask & s->sc_type) 12734d71ab87SJ. Bruce Fields return s; 12744581d140SJ. Bruce Fields return NULL; 12754581d140SJ. Bruce Fields } 12764581d140SJ. Bruce Fields 1277b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1278b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1279b09333c4SRicardo Labiaga { 1280b09333c4SRicardo Labiaga struct nfs4_client *clp; 1281b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 128203a4e1f6SJ. Bruce Fields int ret; 1283b09333c4SRicardo Labiaga 1284b09333c4SRicardo Labiaga clp = alloc_client(name); 1285b09333c4SRicardo Labiaga if (clp == NULL) 1286b09333c4SRicardo Labiaga return NULL; 1287b09333c4SRicardo Labiaga 1288792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 128903a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 129003a4e1f6SJ. Bruce Fields if (ret) { 1291508dc6e1SBenny Halevy spin_lock(&client_lock); 1292b09333c4SRicardo Labiaga free_client(clp); 1293508dc6e1SBenny Halevy spin_unlock(&client_lock); 1294b09333c4SRicardo Labiaga return NULL; 1295b09333c4SRicardo Labiaga } 129638c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1297b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 129846583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 129977a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1300b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1301b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1302b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1303b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1304b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 13055ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 13066ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1307cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 130807cd4909SBenny Halevy clp->cl_time = get_seconds(); 1309b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1310b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1311b09333c4SRicardo Labiaga copy_verf(clp, verf); 1312b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1313b09333c4SRicardo Labiaga gen_confirm(clp); 1314edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1315b09333c4SRicardo Labiaga return clp; 1316b09333c4SRicardo Labiaga } 1317b09333c4SRicardo Labiaga 1318fd39ca9aSNeilBrown static void 13191da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 13201da177e4SLinus Torvalds { 13211da177e4SLinus Torvalds unsigned int idhashval; 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 13241da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13251da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 132636acb66bSBenny Halevy renew_client(clp); 13271da177e4SLinus Torvalds } 13281da177e4SLinus Torvalds 1329fd39ca9aSNeilBrown static void 13301da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 13311da177e4SLinus Torvalds { 13321da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13331da177e4SLinus Torvalds unsigned int strhashval; 13341da177e4SLinus Torvalds 13351da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1336f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1337a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1338328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 13391da177e4SLinus Torvalds renew_client(clp); 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds static struct nfs4_client * 13431da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 13441da177e4SLinus Torvalds { 13451da177e4SLinus Torvalds struct nfs4_client *clp; 13461da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1349a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1350a50d2ad1SJ. Bruce Fields renew_client(clp); 13511da177e4SLinus Torvalds return clp; 13521da177e4SLinus Torvalds } 1353a50d2ad1SJ. Bruce Fields } 13541da177e4SLinus Torvalds return NULL; 13551da177e4SLinus Torvalds } 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds static struct nfs4_client * 13581da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 13591da177e4SLinus Torvalds { 13601da177e4SLinus Torvalds struct nfs4_client *clp; 13611da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1364599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 13651da177e4SLinus Torvalds return clp; 13661da177e4SLinus Torvalds } 13671da177e4SLinus Torvalds return NULL; 13681da177e4SLinus Torvalds } 13691da177e4SLinus Torvalds 13706e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1371a1bcecd2SAndy Adamson { 13726e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1373a1bcecd2SAndy Adamson } 1374a1bcecd2SAndy Adamson 137528ce6054SNeilBrown static struct nfs4_client * 1376e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 137728ce6054SNeilBrown { 137828ce6054SNeilBrown struct nfs4_client *clp; 137928ce6054SNeilBrown 138028ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1381e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 138228ce6054SNeilBrown return clp; 138328ce6054SNeilBrown } 138428ce6054SNeilBrown return NULL; 138528ce6054SNeilBrown } 138628ce6054SNeilBrown 138728ce6054SNeilBrown static struct nfs4_client * 1388e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 138928ce6054SNeilBrown { 139028ce6054SNeilBrown struct nfs4_client *clp; 139128ce6054SNeilBrown 139228ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1393e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 139428ce6054SNeilBrown return clp; 139528ce6054SNeilBrown } 139628ce6054SNeilBrown return NULL; 139728ce6054SNeilBrown } 139828ce6054SNeilBrown 1399fd39ca9aSNeilBrown static void 14006f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 14011da177e4SLinus Torvalds { 140207263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 14036f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 14046f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 14057077ecbaSJeff Layton unsigned short expected_family; 14061da177e4SLinus Torvalds 14077077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 14087077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 14097077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 14107077ecbaSJeff Layton expected_family = AF_INET; 14117077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 14127077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 14137077ecbaSJeff Layton expected_family = AF_INET6; 14147077ecbaSJeff Layton else 14151da177e4SLinus Torvalds goto out_err; 14161da177e4SLinus Torvalds 1417f2ac4dc9SStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, 1418aa9a4ec7SJeff Layton se->se_callback_addr_len, 141907263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 142007263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1421aa9a4ec7SJeff Layton 142207263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 14231da177e4SLinus Torvalds goto out_err; 1424aa9a4ec7SJeff Layton 142507263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 142607263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1427fbf4665fSJeff Layton 142807263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 142907263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1430849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 14311da177e4SLinus Torvalds return; 14321da177e4SLinus Torvalds out_err: 143307263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 143407263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1435849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 14361da177e4SLinus Torvalds "will not receive delegations\n", 14371da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 14381da177e4SLinus Torvalds 14391da177e4SLinus Torvalds return; 14401da177e4SLinus Torvalds } 14411da177e4SLinus Torvalds 1442074fe897SAndy Adamson /* 1443557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1444074fe897SAndy Adamson */ 1445074fe897SAndy Adamson void 1446074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1447074fe897SAndy Adamson { 1448557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1449557ce264SAndy Adamson unsigned int base; 1450074fe897SAndy Adamson 1451557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1452074fe897SAndy Adamson 1453557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1454557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1455bf864a31SAndy Adamson 1456bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1457bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1458557ce264SAndy Adamson slot->sl_datalen = 0; 1459bf864a31SAndy Adamson return; 1460bf864a31SAndy Adamson } 1461557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1462557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1463557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1464557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1465557ce264SAndy Adamson slot->sl_datalen)) 1466557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1467557ce264SAndy Adamson return; 1468074fe897SAndy Adamson } 1469074fe897SAndy Adamson 1470074fe897SAndy Adamson /* 1471abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1472abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1473abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1474abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1475abfabf8cSAndy Adamson * 1476074fe897SAndy Adamson */ 1477abfabf8cSAndy Adamson static __be32 1478abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1479abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1480074fe897SAndy Adamson { 1481abfabf8cSAndy Adamson struct nfsd4_op *op; 1482abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1483074fe897SAndy Adamson 1484abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1485abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1486abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1487abfabf8cSAndy Adamson 1488abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 148973e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1490abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1491abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1492abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1493074fe897SAndy Adamson } 1494abfabf8cSAndy Adamson return op->status; 1495074fe897SAndy Adamson } 1496074fe897SAndy Adamson 1497074fe897SAndy Adamson /* 1498557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1499557ce264SAndy Adamson * session values. 1500074fe897SAndy Adamson */ 1501074fe897SAndy Adamson __be32 1502bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1503bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1504074fe897SAndy Adamson { 1505557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1506074fe897SAndy Adamson __be32 status; 1507074fe897SAndy Adamson 1508557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1509074fe897SAndy Adamson 1510abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1511abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1512abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1513abfabf8cSAndy Adamson return status; 1514074fe897SAndy Adamson 1515557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1516557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1517074fe897SAndy Adamson 1518557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1519557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1520557ce264SAndy Adamson status = slot->sl_status; 1521074fe897SAndy Adamson 1522074fe897SAndy Adamson return status; 1523074fe897SAndy Adamson } 1524074fe897SAndy Adamson 15250733d213SAndy Adamson /* 15260733d213SAndy Adamson * Set the exchange_id flags returned by the server. 15270733d213SAndy Adamson */ 15280733d213SAndy Adamson static void 15290733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 15300733d213SAndy Adamson { 15310733d213SAndy Adamson /* pNFS is not supported */ 15320733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 15330733d213SAndy Adamson 15340733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 15350733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 15360733d213SAndy Adamson 15370733d213SAndy Adamson /* set the wire flags to return to client. */ 15380733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 15390733d213SAndy Adamson } 15400733d213SAndy Adamson 1541631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 1542631fc9eaSJ. Bruce Fields { 1543631fc9eaSJ. Bruce Fields /* 1544631fc9eaSJ. Bruce Fields * Note clp->cl_openowners check isn't quite right: there's no 1545631fc9eaSJ. Bruce Fields * need to count owners without stateid's. 1546631fc9eaSJ. Bruce Fields * 1547631fc9eaSJ. Bruce Fields * Also note we should probably be using this in 4.0 case too. 1548631fc9eaSJ. Bruce Fields */ 15496eccece9SJ. Bruce Fields return !list_empty(&clp->cl_openowners) 15506eccece9SJ. Bruce Fields || !list_empty(&clp->cl_delegations) 15516eccece9SJ. Bruce Fields || !list_empty(&clp->cl_sessions); 1552631fc9eaSJ. Bruce Fields } 1553631fc9eaSJ. Bruce Fields 1554b37ad28bSAl Viro __be32 1555069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1556069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1557069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1558069b6ad4SAndy Adamson { 15590733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 156057b7b43bSJ. Bruce Fields __be32 status; 15610733d213SAndy Adamson unsigned int strhashval; 15620733d213SAndy Adamson char dname[HEXDIR_LEN]; 1563363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 15640733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1565363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 156683e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 15670733d213SAndy Adamson 1568363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 15690733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1570363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 15710733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1572363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 15730733d213SAndy Adamson 1574a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 15750733d213SAndy Adamson return nfserr_inval; 15760733d213SAndy Adamson 15770733d213SAndy Adamson /* Currently only support SP4_NONE */ 15780733d213SAndy Adamson switch (exid->spa_how) { 15790733d213SAndy Adamson case SP4_NONE: 15800733d213SAndy Adamson break; 15810733d213SAndy Adamson case SP4_SSV: 1582044bc1d4SJ. Bruce Fields return nfserr_serverfault; 15830733d213SAndy Adamson default: 15840733d213SAndy Adamson BUG(); /* checked by xdr code */ 15850733d213SAndy Adamson case SP4_MACH_CRED: 15860733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 15870733d213SAndy Adamson } 15880733d213SAndy Adamson 15890733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 15900733d213SAndy Adamson 15910733d213SAndy Adamson if (status) 15922786cc3aSJ. Bruce Fields return status; 15930733d213SAndy Adamson 15940733d213SAndy Adamson strhashval = clientstr_hashval(dname); 15950733d213SAndy Adamson 15962dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 15970733d213SAndy Adamson nfs4_lock_state(); 1598e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 15990733d213SAndy Adamson if (conf) { 160083e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 160183e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 160283e08fd4SJ. Bruce Fields 1603136e658dSJ. Bruce Fields if (update) { 1604136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 16052dbb269dSJ. Bruce Fields status = nfserr_inval; 1606e203d506SJ. Bruce Fields goto out; 1607e203d506SJ. Bruce Fields } 16082dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 16090733d213SAndy Adamson status = nfserr_perm; 16100733d213SAndy Adamson goto out; 16110733d213SAndy Adamson } 16122dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 16130733d213SAndy Adamson status = nfserr_not_same; 16140733d213SAndy Adamson goto out; 16150733d213SAndy Adamson } 1616136e658dSJ. Bruce Fields /* case 6 */ 16170733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 16180733d213SAndy Adamson new = conf; 16190733d213SAndy Adamson goto out_copy; 16206ddbbbfeSMike Sager } 1621136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 1622631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 1623136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 1624136e658dSJ. Bruce Fields goto out; 1625136e658dSJ. Bruce Fields } 1626b9831b59SJ. Bruce Fields expire_client(conf); 1627b9831b59SJ. Bruce Fields goto out_new; 1628631fc9eaSJ. Bruce Fields } 1629136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 16300f1ba0efSJ. Bruce Fields conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 1631136e658dSJ. Bruce Fields new = conf; 1632136e658dSJ. Bruce Fields goto out_copy; 1633136e658dSJ. Bruce Fields } 16342dbb269dSJ. Bruce Fields /* case 5, client reboot */ 16350733d213SAndy Adamson goto out_new; 16360733d213SAndy Adamson } 16376ddbbbfeSMike Sager 16382dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 16390733d213SAndy Adamson status = nfserr_noent; 16400733d213SAndy Adamson goto out; 16410733d213SAndy Adamson } 16420733d213SAndy Adamson 1643e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 16442dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 16450733d213SAndy Adamson expire_client(unconf); 16460733d213SAndy Adamson 16472dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 16480733d213SAndy Adamson out_new: 1649b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 16500733d213SAndy Adamson if (new == NULL) { 16514731030dSJ. Bruce Fields status = nfserr_jukebox; 16520733d213SAndy Adamson goto out; 16530733d213SAndy Adamson } 16540733d213SAndy Adamson 16550733d213SAndy Adamson gen_clid(new); 16560733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 16570733d213SAndy Adamson out_copy: 16580733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 16590733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 16600733d213SAndy Adamson 1661778df3f0SJ. Bruce Fields exid->seqid = new->cl_cs_slot.sl_seqid + 1; 16620733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 16630733d213SAndy Adamson 16640733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 166549557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 16660733d213SAndy Adamson status = nfs_ok; 16670733d213SAndy Adamson 16680733d213SAndy Adamson out: 16690733d213SAndy Adamson nfs4_unlock_state(); 16700733d213SAndy Adamson return status; 1671069b6ad4SAndy Adamson } 1672069b6ad4SAndy Adamson 167357b7b43bSJ. Bruce Fields static __be32 167488e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1675b85d4c01SBenny Halevy { 167688e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 167788e588d5SAndy Adamson slot_seqid); 1678b85d4c01SBenny Halevy 1679b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 168088e588d5SAndy Adamson if (slot_inuse) { 168188e588d5SAndy Adamson if (seqid == slot_seqid) 1682b85d4c01SBenny Halevy return nfserr_jukebox; 1683b85d4c01SBenny Halevy else 1684b85d4c01SBenny Halevy return nfserr_seq_misordered; 1685b85d4c01SBenny Halevy } 1686f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 168788e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1688b85d4c01SBenny Halevy return nfs_ok; 168988e588d5SAndy Adamson if (seqid == slot_seqid) 1690b85d4c01SBenny Halevy return nfserr_replay_cache; 1691b85d4c01SBenny Halevy return nfserr_seq_misordered; 1692b85d4c01SBenny Halevy } 1693b85d4c01SBenny Halevy 169449557cc7SAndy Adamson /* 169549557cc7SAndy Adamson * Cache the create session result into the create session single DRC 169649557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 169749557cc7SAndy Adamson * Do this for solo or embedded create session operations. 169849557cc7SAndy Adamson */ 169949557cc7SAndy Adamson static void 170049557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 170157b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 170249557cc7SAndy Adamson { 170349557cc7SAndy Adamson slot->sl_status = nfserr; 170449557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 170549557cc7SAndy Adamson } 170649557cc7SAndy Adamson 170749557cc7SAndy Adamson static __be32 170849557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 170949557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 171049557cc7SAndy Adamson { 171149557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 171249557cc7SAndy Adamson return slot->sl_status; 171349557cc7SAndy Adamson } 171449557cc7SAndy Adamson 17151b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 17161b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 17171b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17181b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 17191b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17201b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 17211b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 17221b74c25bSMi Jinlong 17231b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 17241b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 17251b74c25bSMi Jinlong 1 + /* status */ \ 17261b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17271b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 17281b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17291b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 17301b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 17311b74c25bSMi Jinlong 173257b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 17331b74c25bSMi Jinlong { 17341b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 17351b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 17361b74c25bSMi Jinlong } 17371b74c25bSMi Jinlong 1738069b6ad4SAndy Adamson __be32 1739069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1740069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1741069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1742069b6ad4SAndy Adamson { 1743363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1744ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1745ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 174649557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 174786c3e16cSJ. Bruce Fields bool confirm_me = false; 174857b7b43bSJ. Bruce Fields __be32 status = 0; 1749ec6b5d7bSAndy Adamson 1750a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1751a62573dcSMi Jinlong return nfserr_inval; 1752a62573dcSMi Jinlong 1753ec6b5d7bSAndy Adamson nfs4_lock_state(); 1754ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1755ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1756ec6b5d7bSAndy Adamson 1757ec6b5d7bSAndy Adamson if (conf) { 175849557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 175949557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 176038eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 176149557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 176238eb76a5SAndy Adamson goto out; 176349557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1764ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1765ec6b5d7bSAndy Adamson goto out; 1766ec6b5d7bSAndy Adamson } 1767ec6b5d7bSAndy Adamson } else if (unconf) { 1768ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1769363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1770ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1771ec6b5d7bSAndy Adamson goto out; 1772ec6b5d7bSAndy Adamson } 177349557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 177449557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 177538eb76a5SAndy Adamson if (status) { 177638eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1777ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1778cd5b8144SJ. Bruce Fields goto out; 1779ec6b5d7bSAndy Adamson } 178086c3e16cSJ. Bruce Fields confirm_me = true; 1781ec6b5d7bSAndy Adamson conf = unconf; 1782ec6b5d7bSAndy Adamson } else { 1783ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1784ec6b5d7bSAndy Adamson goto out; 1785ec6b5d7bSAndy Adamson } 1786ec6b5d7bSAndy Adamson 1787408b79bcSJ. Bruce Fields /* 17888323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 17898323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 17908323c3b2SJ. Bruce Fields */ 17918323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 17928323c3b2SJ. Bruce Fields /* 1793408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1794408b79bcSJ. Bruce Fields */ 1795408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1796408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1797408b79bcSJ. Bruce Fields 17981b74c25bSMi Jinlong status = nfserr_toosmall; 17991b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 18001b74c25bSMi Jinlong goto out; 18011b74c25bSMi Jinlong 1802ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1803ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1804ac7c46f2SJ. Bruce Fields if (!new) 1805ec6b5d7bSAndy Adamson goto out; 1806ac7c46f2SJ. Bruce Fields status = nfs_ok; 1807ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1808ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 180912050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 181012050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 181186c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 181249557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1813ec6b5d7bSAndy Adamson 181449557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 181549557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 1816b9831b59SJ. Bruce Fields if (confirm_me) { 1817b9831b59SJ. Bruce Fields unsigned int hash = clientstr_hashval(unconf->cl_recdir); 1818b9831b59SJ. Bruce Fields struct nfs4_client *old = 1819b9831b59SJ. Bruce Fields find_confirmed_client_by_str(conf->cl_recdir, hash); 1820b9831b59SJ. Bruce Fields if (old) 1821b9831b59SJ. Bruce Fields expire_client(old); 182286c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1823b9831b59SJ. Bruce Fields } 1824ec6b5d7bSAndy Adamson out: 1825ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1826ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1827ec6b5d7bSAndy Adamson return status; 1828069b6ad4SAndy Adamson } 1829069b6ad4SAndy Adamson 183057716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 183157716355SJ. Bruce Fields { 183257716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 183357716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 183457716355SJ. Bruce Fields 183557716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 183657716355SJ. Bruce Fields } 183757716355SJ. Bruce Fields 18381d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 18391d1bc8f2SJ. Bruce Fields { 18401d1bc8f2SJ. Bruce Fields switch (*dir) { 18411d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 18421d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 18431d1bc8f2SJ. Bruce Fields return nfs_ok; 18441d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 18451d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 18461d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 18471d1bc8f2SJ. Bruce Fields return nfs_ok; 18481d1bc8f2SJ. Bruce Fields }; 18491d1bc8f2SJ. Bruce Fields return nfserr_inval; 18501d1bc8f2SJ. Bruce Fields } 18511d1bc8f2SJ. Bruce Fields 18521d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 18531d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 18541d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 18551d1bc8f2SJ. Bruce Fields { 18561d1bc8f2SJ. Bruce Fields __be32 status; 18571d1bc8f2SJ. Bruce Fields 18581d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 18591d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 18601d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 18611d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 18621d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 18631d1bc8f2SJ. Bruce Fields * client_lock iself: */ 18641d1bc8f2SJ. Bruce Fields if (cstate->session) { 18651d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 18661d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 18671d1bc8f2SJ. Bruce Fields } 18681d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 18691d1bc8f2SJ. Bruce Fields if (!cstate->session) 18701d1bc8f2SJ. Bruce Fields return nfserr_badsession; 18711d1bc8f2SJ. Bruce Fields 18721d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 18731db2b9ddSBryan Schumaker if (!status) 18741d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 18751db2b9ddSBryan Schumaker return status; 18761d1bc8f2SJ. Bruce Fields } 18771d1bc8f2SJ. Bruce Fields 18785d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 18795d4cec2fSJ. Bruce Fields { 18805d4cec2fSJ. Bruce Fields if (!session) 18815d4cec2fSJ. Bruce Fields return 0; 18825d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 18835d4cec2fSJ. Bruce Fields } 18845d4cec2fSJ. Bruce Fields 1885069b6ad4SAndy Adamson __be32 1886069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1887069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1888069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1889069b6ad4SAndy Adamson { 1890e10e0cfcSBenny Halevy struct nfsd4_session *ses; 189157b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1892e10e0cfcSBenny Halevy 1893e10e0cfcSBenny Halevy /* Notes: 1894e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1895e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1896e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1897e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1898e10e0cfcSBenny Halevy */ 1899e10e0cfcSBenny Halevy 19005d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 190157716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 190257716355SJ. Bruce Fields return nfserr_not_only_op; 190357716355SJ. Bruce Fields } 1904e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 19059089f1b4SBenny Halevy spin_lock(&client_lock); 1906e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1907e10e0cfcSBenny Halevy if (!ses) { 19089089f1b4SBenny Halevy spin_unlock(&client_lock); 1909e10e0cfcSBenny Halevy goto out; 1910e10e0cfcSBenny Halevy } 1911e10e0cfcSBenny Halevy 1912e10e0cfcSBenny Halevy unhash_session(ses); 19139089f1b4SBenny Halevy spin_unlock(&client_lock); 1914e10e0cfcSBenny Halevy 1915ab707e15SBenny Halevy nfs4_lock_state(); 191684f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1917ab707e15SBenny Halevy nfs4_unlock_state(); 191819cf5c02SJ. Bruce Fields 1919508dc6e1SBenny Halevy spin_lock(&client_lock); 192019cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1921508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1922508dc6e1SBenny Halevy spin_unlock(&client_lock); 1923e10e0cfcSBenny Halevy status = nfs_ok; 1924e10e0cfcSBenny Halevy out: 1925e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1926e10e0cfcSBenny Halevy return status; 1927069b6ad4SAndy Adamson } 1928069b6ad4SAndy Adamson 1929a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1930328ead28SJ. Bruce Fields { 1931328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1932328ead28SJ. Bruce Fields 1933328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1934a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1935328ead28SJ. Bruce Fields return c; 1936328ead28SJ. Bruce Fields } 1937328ead28SJ. Bruce Fields } 1938328ead28SJ. Bruce Fields return NULL; 1939328ead28SJ. Bruce Fields } 1940328ead28SJ. Bruce Fields 1941a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1942328ead28SJ. Bruce Fields { 1943328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1944a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 194521b75b01SJ. Bruce Fields int ret; 1946328ead28SJ. Bruce Fields 1947328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1948a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1949328ead28SJ. Bruce Fields if (c) { 1950328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1951328ead28SJ. Bruce Fields free_conn(new); 1952328ead28SJ. Bruce Fields return; 1953328ead28SJ. Bruce Fields } 1954328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1955328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 195621b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 195721b75b01SJ. Bruce Fields if (ret) 195821b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 195921b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1960328ead28SJ. Bruce Fields return; 1961328ead28SJ. Bruce Fields } 1962328ead28SJ. Bruce Fields 1963868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1964868b89c3SMi Jinlong { 1965868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1966868b89c3SMi Jinlong 1967868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1968868b89c3SMi Jinlong } 1969868b89c3SMi Jinlong 1970ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1971ae82a8d0SMi Jinlong struct nfsd4_session *session) 1972ae82a8d0SMi Jinlong { 1973ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1974ae82a8d0SMi Jinlong 1975ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1976ae82a8d0SMi Jinlong } 1977ae82a8d0SMi Jinlong 1978069b6ad4SAndy Adamson __be32 1979b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1980069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1981069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1982069b6ad4SAndy Adamson { 1983f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1984b85d4c01SBenny Halevy struct nfsd4_session *session; 1985b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1986a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 198757b7b43bSJ. Bruce Fields __be32 status; 1988b85d4c01SBenny Halevy 1989f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1990f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1991f9bb94c4SAndy Adamson 1992a663bdd8SJ. Bruce Fields /* 1993a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1994a663bdd8SJ. Bruce Fields * below. 1995a663bdd8SJ. Bruce Fields */ 1996a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1997a663bdd8SJ. Bruce Fields if (!conn) 1998a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1999a663bdd8SJ. Bruce Fields 20009089f1b4SBenny Halevy spin_lock(&client_lock); 2001b85d4c01SBenny Halevy status = nfserr_badsession; 2002b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 2003b85d4c01SBenny Halevy if (!session) 2004b85d4c01SBenny Halevy goto out; 2005b85d4c01SBenny Halevy 2006868b89c3SMi Jinlong status = nfserr_too_many_ops; 2007868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 2008868b89c3SMi Jinlong goto out; 2009868b89c3SMi Jinlong 2010ae82a8d0SMi Jinlong status = nfserr_req_too_big; 2011ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 2012ae82a8d0SMi Jinlong goto out; 2013ae82a8d0SMi Jinlong 2014b85d4c01SBenny Halevy status = nfserr_badslot; 20156c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 2016b85d4c01SBenny Halevy goto out; 2017b85d4c01SBenny Halevy 2018557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 2019b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 2020b85d4c01SBenny Halevy 2021a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 2022a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 2023a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 2024a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 2025a8dfdaebSAndy Adamson 202673e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 202773e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 2028b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 2029bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 2030bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 2031bf5c43c8SJ. Bruce Fields goto out; 2032b85d4c01SBenny Halevy cstate->slot = slot; 2033b85d4c01SBenny Halevy cstate->session = session; 2034da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 2035557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 2036bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 2037da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2038aaf84eb9SBenny Halevy goto out; 2039b85d4c01SBenny Halevy } 2040b85d4c01SBenny Halevy if (status) 2041b85d4c01SBenny Halevy goto out; 2042b85d4c01SBenny Halevy 2043a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 2044a663bdd8SJ. Bruce Fields conn = NULL; 2045328ead28SJ. Bruce Fields 2046b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2047b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2048bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 204973e79482SJ. Bruce Fields if (seq->cachethis) 205073e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2051bf5c43c8SJ. Bruce Fields else 2052bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2053b85d4c01SBenny Halevy 2054b85d4c01SBenny Halevy cstate->slot = slot; 2055b85d4c01SBenny Halevy cstate->session = session; 2056b85d4c01SBenny Halevy 2057b85d4c01SBenny Halevy out: 205826c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 2059aaf84eb9SBenny Halevy if (cstate->session) { 20600d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 20610d7bb719SJ. Bruce Fields 206236acb66bSBenny Halevy nfsd4_get_session(cstate->session); 20630d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 20645423732aSBenny Halevy switch (clp->cl_cb_state) { 20655423732aSBenny Halevy case NFSD4_CB_DOWN: 2066fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 20675423732aSBenny Halevy break; 20685423732aSBenny Halevy case NFSD4_CB_FAULT: 2069fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 20705423732aSBenny Halevy break; 2071fc0c3dd1SBenny Halevy default: 2072fc0c3dd1SBenny Halevy seq->status_flags = 0; 20735423732aSBenny Halevy } 2074aaf84eb9SBenny Halevy } 2075a663bdd8SJ. Bruce Fields kfree(conn); 207636acb66bSBenny Halevy spin_unlock(&client_lock); 2077b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2078b85d4c01SBenny Halevy return status; 2079069b6ad4SAndy Adamson } 2080069b6ad4SAndy Adamson 2081345c2842SMi Jinlong __be32 2082345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2083345c2842SMi Jinlong { 2084345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 208557b7b43bSJ. Bruce Fields __be32 status = 0; 2086345c2842SMi Jinlong 2087345c2842SMi Jinlong nfs4_lock_state(); 2088345c2842SMi Jinlong unconf = find_unconfirmed_client(&dc->clientid); 2089345c2842SMi Jinlong conf = find_confirmed_client(&dc->clientid); 2090345c2842SMi Jinlong 2091345c2842SMi Jinlong if (conf) { 2092345c2842SMi Jinlong clp = conf; 2093345c2842SMi Jinlong 20946eccece9SJ. Bruce Fields if (!is_client_expired(conf) && client_has_state(conf)) { 2095345c2842SMi Jinlong status = nfserr_clientid_busy; 2096345c2842SMi Jinlong goto out; 2097345c2842SMi Jinlong } 2098345c2842SMi Jinlong 2099345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2100345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2101345c2842SMi Jinlong status = nfserr_clientid_busy; 2102345c2842SMi Jinlong goto out; 2103345c2842SMi Jinlong } 2104345c2842SMi Jinlong } else if (unconf) 2105345c2842SMi Jinlong clp = unconf; 2106345c2842SMi Jinlong else { 2107345c2842SMi Jinlong status = nfserr_stale_clientid; 2108345c2842SMi Jinlong goto out; 2109345c2842SMi Jinlong } 2110345c2842SMi Jinlong 2111345c2842SMi Jinlong expire_client(clp); 2112345c2842SMi Jinlong out: 2113345c2842SMi Jinlong nfs4_unlock_state(); 2114345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2115345c2842SMi Jinlong return status; 2116345c2842SMi Jinlong } 2117345c2842SMi Jinlong 2118069b6ad4SAndy Adamson __be32 21194dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 21204dc6ec00SJ. Bruce Fields { 212157b7b43bSJ. Bruce Fields __be32 status = 0; 2122bcecf1ccSMi Jinlong 21234dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 21244dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 21254dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 21264dc6ec00SJ. Bruce Fields /* 21274dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 21284dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 21294dc6ec00SJ. Bruce Fields */ 21304dc6ec00SJ. Bruce Fields return nfs_ok; 21314dc6ec00SJ. Bruce Fields } 2132bcecf1ccSMi Jinlong 21334dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2134bcecf1ccSMi Jinlong status = nfserr_complete_already; 2135a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2136a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2137bcecf1ccSMi Jinlong goto out; 2138bcecf1ccSMi Jinlong 2139bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2140bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 21414dc6ec00SJ. Bruce Fields /* 21424dc6ec00SJ. Bruce Fields * The following error isn't really legal. 21434dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 21444dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 21454dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 21464dc6ec00SJ. Bruce Fields * client. 21474dc6ec00SJ. Bruce Fields */ 2148bcecf1ccSMi Jinlong goto out; 2149bcecf1ccSMi Jinlong 2150bcecf1ccSMi Jinlong status = nfs_ok; 21512a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2152bcecf1ccSMi Jinlong out: 21534dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2154bcecf1ccSMi Jinlong return status; 21554dc6ec00SJ. Bruce Fields } 21564dc6ec00SJ. Bruce Fields 21574dc6ec00SJ. Bruce Fields __be32 2158b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2159b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 21601da177e4SLinus Torvalds { 2161a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 21621da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 21631da177e4SLinus Torvalds unsigned int strhashval; 216428ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2165b37ad28bSAl Viro __be32 status; 2166a55370a3SNeilBrown char dname[HEXDIR_LEN]; 21671da177e4SLinus Torvalds 2168a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2169a55370a3SNeilBrown if (status) 217073aea4ecSNeil Brown return status; 2171a55370a3SNeilBrown 2172a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 21731da177e4SLinus Torvalds 217463db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 21751da177e4SLinus Torvalds nfs4_lock_state(); 2176e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 217728ce6054SNeilBrown if (conf) { 217863db4632SJ. Bruce Fields /* case 0: */ 21791da177e4SLinus Torvalds status = nfserr_clid_inuse; 2180e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2181e203d506SJ. Bruce Fields goto out; 2182026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2183363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2184363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2185363168b4SJeff Layton sizeof(addr_str)); 2186026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2187363168b4SJeff Layton "at %s\n", addr_str); 21881da177e4SLinus Torvalds goto out; 21891da177e4SLinus Torvalds } 21901da177e4SLinus Torvalds } 2191e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 21921da177e4SLinus Torvalds if (unconf) 21931da177e4SLinus Torvalds expire_client(unconf); 21948f930711SJ. Bruce Fields status = nfserr_jukebox; 2195b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2196a55370a3SNeilBrown if (new == NULL) 21971da177e4SLinus Torvalds goto out; 219834b232bbSJ. Bruce Fields if (conf && same_verf(&conf->cl_verifier, &clverifier)) 219963db4632SJ. Bruce Fields /* case 1: probable callback update */ 22001da177e4SLinus Torvalds copy_clid(new, conf); 220134b232bbSJ. Bruce Fields else /* case 4 (new client) or cases 2, 3 (client reboot): */ 22021da177e4SLinus Torvalds gen_clid(new); 22038323c3b2SJ. Bruce Fields /* 22048323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 22058323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 22068323c3b2SJ. Bruce Fields */ 22078323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 22086f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2209c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 22101da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 22111da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 22121da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22131da177e4SLinus Torvalds status = nfs_ok; 22141da177e4SLinus Torvalds out: 22151da177e4SLinus Torvalds nfs4_unlock_state(); 22161da177e4SLinus Torvalds return status; 22171da177e4SLinus Torvalds } 22181da177e4SLinus Torvalds 22191da177e4SLinus Torvalds 2220b37ad28bSAl Viro __be32 2221b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2222b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2223b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22241da177e4SLinus Torvalds { 222521ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22261da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22271da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2228b37ad28bSAl Viro __be32 status; 22291da177e4SLinus Torvalds 22301da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 22311da177e4SLinus Torvalds return nfserr_stale_clientid; 22321da177e4SLinus Torvalds nfs4_lock_state(); 223321ab45a4SNeilBrown 223421ab45a4SNeilBrown conf = find_confirmed_client(clid); 223521ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 2236a186e767SJ. Bruce Fields /* 22378695b90aSJ. Bruce Fields * We try hard to give out unique clientid's, so if we get an 22388695b90aSJ. Bruce Fields * attempt to confirm the same clientid with a different cred, 22398695b90aSJ. Bruce Fields * there's a bug somewhere. Let's charitably assume it's our 22408695b90aSJ. Bruce Fields * bug. 2241a186e767SJ. Bruce Fields */ 22428695b90aSJ. Bruce Fields status = nfserr_serverfault; 22438695b90aSJ. Bruce Fields if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) 22448695b90aSJ. Bruce Fields goto out; 22458695b90aSJ. Bruce Fields if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22468695b90aSJ. Bruce Fields goto out; 224763db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 224890d700b7SJ. Bruce Fields if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { 224990d700b7SJ. Bruce Fields if (conf && !unconf) /* case 2: probable retransmit */ 225090d700b7SJ. Bruce Fields status = nfs_ok; 225190d700b7SJ. Bruce Fields else /* case 4: client hasn't noticed we rebooted yet? */ 225290d700b7SJ. Bruce Fields status = nfserr_stale_clientid; 225390d700b7SJ. Bruce Fields goto out; 225490d700b7SJ. Bruce Fields } 225590d700b7SJ. Bruce Fields status = nfs_ok; 225690d700b7SJ. Bruce Fields if (conf) { /* case 1: callback update */ 22575a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22585a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22591a69c179SNeilBrown expire_client(unconf); 226090d700b7SJ. Bruce Fields } else { /* case 3: normal case; new or rebooted client */ 22618695b90aSJ. Bruce Fields unsigned int hash = clientstr_hashval(unconf->cl_recdir); 22621a69c179SNeilBrown 22638695b90aSJ. Bruce Fields conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); 22641a69c179SNeilBrown if (conf) { 22652a4317c5SJeff Layton nfsd4_client_record_remove(conf); 22661a69c179SNeilBrown expire_client(conf); 22671a69c179SNeilBrown } 22681da177e4SLinus Torvalds move_to_confirmed(unconf); 2269f3d03b92SJ. Bruce Fields nfsd4_probe_callback(unconf); 227008e8987cSNeilBrown } 22711da177e4SLinus Torvalds out: 22721da177e4SLinus Torvalds nfs4_unlock_state(); 22731da177e4SLinus Torvalds return status; 22741da177e4SLinus Torvalds } 22751da177e4SLinus Torvalds 227632513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 22771da177e4SLinus Torvalds { 227832513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 227932513b40SJ. Bruce Fields } 228032513b40SJ. Bruce Fields 228132513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 228232513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 228332513b40SJ. Bruce Fields { 22841da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 22851da177e4SLinus Torvalds 22868b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 22871da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 22888beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 22898beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 22901da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 229147f9940cSMeelap Shah fp->fi_had_conflict = false; 2292acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2293f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2294f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 229547cee541SPavel Emelyanov spin_lock(&recall_lock); 229647cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 229747cee541SPavel Emelyanov spin_unlock(&recall_lock); 22981da177e4SLinus Torvalds } 22991da177e4SLinus Torvalds 23001da177e4SLinus Torvalds static void 2301e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2302e60d4398SNeilBrown { 2303e60d4398SNeilBrown if (*slab == NULL) 2304e60d4398SNeilBrown return; 23051a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2306e60d4398SNeilBrown *slab = NULL; 2307e60d4398SNeilBrown } 2308e60d4398SNeilBrown 2309e8ff2a84SJ. Bruce Fields void 2310e60d4398SNeilBrown nfsd4_free_slabs(void) 2311e60d4398SNeilBrown { 2312fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2313fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2314e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23155ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23165b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2317e60d4398SNeilBrown } 23181da177e4SLinus Torvalds 231972083396SBryan Schumaker int 23201da177e4SLinus Torvalds nfsd4_init_slabs(void) 23211da177e4SLinus Torvalds { 2322fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2323fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2324fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2325fe0750e5SJ. Bruce Fields goto out_nomem; 2326fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2327fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2328fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2329e60d4398SNeilBrown goto out_nomem; 2330e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 233120c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2332e60d4398SNeilBrown if (file_slab == NULL) 2333e60d4398SNeilBrown goto out_nomem; 23345ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2335dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23365ac049acSNeilBrown if (stateid_slab == NULL) 23375ac049acSNeilBrown goto out_nomem; 23385b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 233920c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23405b2d21c1SNeilBrown if (deleg_slab == NULL) 23415b2d21c1SNeilBrown goto out_nomem; 2342e60d4398SNeilBrown return 0; 2343e60d4398SNeilBrown out_nomem: 2344e60d4398SNeilBrown nfsd4_free_slabs(); 23451da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23461da177e4SLinus Torvalds return -ENOMEM; 23471da177e4SLinus Torvalds } 23481da177e4SLinus Torvalds 2349fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23501da177e4SLinus Torvalds { 2351fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2352fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2353fe0750e5SJ. Bruce Fields } 2354fe0750e5SJ. Bruce Fields 2355fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2356fe0750e5SJ. Bruce Fields { 2357fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2358fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23591da177e4SLinus Torvalds } 23601da177e4SLinus Torvalds 2361ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2362ff194bd9SJ. Bruce Fields { 2363ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2364ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2365ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2366ff194bd9SJ. Bruce Fields } 2367ff194bd9SJ. Bruce Fields 2368fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 23691da177e4SLinus Torvalds { 23701da177e4SLinus Torvalds struct nfs4_stateowner *sop; 23711da177e4SLinus Torvalds 2372fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2373ff194bd9SJ. Bruce Fields if (!sop) 2374ff194bd9SJ. Bruce Fields return NULL; 2375ff194bd9SJ. Bruce Fields 2376ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2377ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2378fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2379ff194bd9SJ. Bruce Fields return NULL; 2380ff194bd9SJ. Bruce Fields } 23811da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2382ff194bd9SJ. Bruce Fields 2383ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2384ff194bd9SJ. Bruce Fields sop->so_client = clp; 2385ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 23861da177e4SLinus Torvalds return sop; 23871da177e4SLinus Torvalds } 2388ff194bd9SJ. Bruce Fields 2389fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2390ff194bd9SJ. Bruce Fields { 239116bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2392fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 23931da177e4SLinus Torvalds } 23941da177e4SLinus Torvalds 2395fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 23961da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2397fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 23981da177e4SLinus Torvalds 2399fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2400fe0750e5SJ. Bruce Fields if (!oo) 24011da177e4SLinus Torvalds return NULL; 2402fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2403fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2404d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2405fe0750e5SJ. Bruce Fields oo->oo_time = 0; 240638c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2407fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2408fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2409fe0750e5SJ. Bruce Fields return oo; 24101da177e4SLinus Torvalds } 24111da177e4SLinus Torvalds 2412996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2413fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2414d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24151da177e4SLinus Torvalds 2416996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2417ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2418fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24198beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2420fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 242113cd2184SNeilBrown get_nfs4_file(fp); 24221da177e4SLinus Torvalds stp->st_file = fp; 24231da177e4SLinus Torvalds stp->st_access_bmap = 0; 24241da177e4SLinus Torvalds stp->st_deny_bmap = 0; 242582c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2426ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 24274c4cd222SNeilBrown stp->st_openstp = NULL; 24281da177e4SLinus Torvalds } 24291da177e4SLinus Torvalds 24301da177e4SLinus Torvalds static void 2431fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24321da177e4SLinus Torvalds { 2433fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24341da177e4SLinus Torvalds 2435fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2436fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24371da177e4SLinus Torvalds } 24381da177e4SLinus Torvalds 24391da177e4SLinus Torvalds static int 2440599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2441599e0a22SJ. Bruce Fields clientid_t *clid) 2442599e0a22SJ. Bruce Fields { 2443599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2444599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2445599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24461da177e4SLinus Torvalds } 24471da177e4SLinus Torvalds 2448fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24491da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 24501da177e4SLinus Torvalds { 2451a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2452a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 24531da177e4SLinus Torvalds 245416bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 245516bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 245616bfdaafSJ. Bruce Fields continue; 2457a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2458a50d2ad1SJ. Bruce Fields oo = openowner(so); 2459a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2460a50d2ad1SJ. Bruce Fields return oo; 2461a50d2ad1SJ. Bruce Fields } 24621da177e4SLinus Torvalds } 24631da177e4SLinus Torvalds return NULL; 24641da177e4SLinus Torvalds } 24651da177e4SLinus Torvalds 24661da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 24671da177e4SLinus Torvalds static struct nfs4_file * 24681da177e4SLinus Torvalds find_file(struct inode *ino) 24691da177e4SLinus Torvalds { 24701da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 24711da177e4SLinus Torvalds struct nfs4_file *fp; 24721da177e4SLinus Torvalds 24738b671b80SJ. Bruce Fields spin_lock(&recall_lock); 24741da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 247513cd2184SNeilBrown if (fp->fi_inode == ino) { 247613cd2184SNeilBrown get_nfs4_file(fp); 24778b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24781da177e4SLinus Torvalds return fp; 24791da177e4SLinus Torvalds } 248013cd2184SNeilBrown } 24818b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24821da177e4SLinus Torvalds return NULL; 24831da177e4SLinus Torvalds } 24841da177e4SLinus Torvalds 24854f83aa30SJ. Bruce Fields /* 24861da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 24871da177e4SLinus Torvalds * WRITE with all zero or all one stateid 24881da177e4SLinus Torvalds */ 2489b37ad28bSAl Viro static __be32 24901da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 24911da177e4SLinus Torvalds { 24921da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 24931da177e4SLinus Torvalds struct nfs4_file *fp; 2494dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2495b37ad28bSAl Viro __be32 ret; 24961da177e4SLinus Torvalds 24971da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 24981da177e4SLinus Torvalds 24991da177e4SLinus Torvalds fp = find_file(ino); 250013cd2184SNeilBrown if (!fp) 250113cd2184SNeilBrown return nfs_ok; 2502b700949bSNeilBrown ret = nfserr_locked; 25031da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25048beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2505ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2506ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 250713cd2184SNeilBrown goto out; 25081da177e4SLinus Torvalds } 250913cd2184SNeilBrown ret = nfs_ok; 251013cd2184SNeilBrown out: 251113cd2184SNeilBrown put_nfs4_file(fp); 251213cd2184SNeilBrown return ret; 25131da177e4SLinus Torvalds } 25141da177e4SLinus Torvalds 25156b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25161da177e4SLinus Torvalds { 25171da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25181da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25191da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25201da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25211da177e4SLinus Torvalds * it's safe to take a reference: */ 25221da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25231da177e4SLinus Torvalds 25241da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25251da177e4SLinus Torvalds 2526460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25271da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25281da177e4SLinus Torvalds 25296b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25306b57d9c8SJ. Bruce Fields } 25316b57d9c8SJ. Bruce Fields 2532acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25336b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25346b57d9c8SJ. Bruce Fields { 2535acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2536acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25376b57d9c8SJ. Bruce Fields 2538acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2539acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2540acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 25410272e1fdSJ. Bruce Fields /* 25420272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2543acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25446b57d9c8SJ. Bruce Fields * in time: 25450272e1fdSJ. Bruce Fields */ 25460272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25471da177e4SLinus Torvalds 25485d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2549acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2550acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25515d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 25525d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 25531da177e4SLinus Torvalds } 25541da177e4SLinus Torvalds 25551da177e4SLinus Torvalds static 25561da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 25571da177e4SLinus Torvalds { 25581da177e4SLinus Torvalds if (arg & F_UNLCK) 25591da177e4SLinus Torvalds return lease_modify(onlist, arg); 25601da177e4SLinus Torvalds else 25611da177e4SLinus Torvalds return -EAGAIN; 25621da177e4SLinus Torvalds } 25631da177e4SLinus Torvalds 25647b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 25658fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 25668fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 25671da177e4SLinus Torvalds }; 25681da177e4SLinus Torvalds 25697a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 25707a8711c9SJ. Bruce Fields { 25717a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 25727a8711c9SJ. Bruce Fields return nfs_ok; 25737a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 25747a8711c9SJ. Bruce Fields return nfserr_replay_me; 25757a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 25767a8711c9SJ. Bruce Fields return nfs_ok; 25777a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 25787a8711c9SJ. Bruce Fields } 25791da177e4SLinus Torvalds 2580b37ad28bSAl Viro __be32 25816668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 25826668958fSAndy Adamson struct nfsd4_open *open) 25831da177e4SLinus Torvalds { 25841da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 25851da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 25861da177e4SLinus Torvalds unsigned int strhashval; 2587fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 25884cdc951bSJ. Bruce Fields __be32 status; 25891da177e4SLinus Torvalds 25901da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 25911da177e4SLinus Torvalds return nfserr_stale_clientid; 259232513b40SJ. Bruce Fields /* 259332513b40SJ. Bruce Fields * In case we need it later, after we've already created the 259432513b40SJ. Bruce Fields * file and don't want to risk a further failure: 259532513b40SJ. Bruce Fields */ 259632513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 259732513b40SJ. Bruce Fields if (open->op_file == NULL) 259832513b40SJ. Bruce Fields return nfserr_jukebox; 25991da177e4SLinus Torvalds 260016bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2601fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2602fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2603fe0750e5SJ. Bruce Fields if (!oo) { 26040f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 26050f442aa2SJ. Bruce Fields if (clp == NULL) 26060f442aa2SJ. Bruce Fields return nfserr_expired; 2607bcf130f9SJ. Bruce Fields goto new_owner; 26080f442aa2SJ. Bruce Fields } 2609dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26100f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2611fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2612fe0750e5SJ. Bruce Fields release_openowner(oo); 2613fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2614bcf130f9SJ. Bruce Fields goto new_owner; 26150f442aa2SJ. Bruce Fields } 26164cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26174cdc951bSJ. Bruce Fields if (status) 26184cdc951bSJ. Bruce Fields return status; 26194cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26204cdc951bSJ. Bruce Fields goto alloc_stateid; 2621bcf130f9SJ. Bruce Fields new_owner: 2622fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2623fe0750e5SJ. Bruce Fields if (oo == NULL) 26243e772463SJ. Bruce Fields return nfserr_jukebox; 2625fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26264cdc951bSJ. Bruce Fields alloc_stateid: 26274cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26284cdc951bSJ. Bruce Fields if (!open->op_stp) 26294cdc951bSJ. Bruce Fields return nfserr_jukebox; 26300f442aa2SJ. Bruce Fields return nfs_ok; 26311da177e4SLinus Torvalds } 26321da177e4SLinus Torvalds 2633b37ad28bSAl Viro static inline __be32 26344a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26354a6e43e6SNeilBrown { 26364a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26374a6e43e6SNeilBrown return nfserr_openmode; 26384a6e43e6SNeilBrown else 26394a6e43e6SNeilBrown return nfs_ok; 26404a6e43e6SNeilBrown } 26414a6e43e6SNeilBrown 2642c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 264324a0111eSJ. Bruce Fields { 264424a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 264524a0111eSJ. Bruce Fields } 264624a0111eSJ. Bruce Fields 264738c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2648f459e453SJ. Bruce Fields { 2649f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2650f459e453SJ. Bruce Fields 265138c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2652f459e453SJ. Bruce Fields if (!ret) 2653f459e453SJ. Bruce Fields return NULL; 2654f459e453SJ. Bruce Fields return delegstateid(ret); 2655f459e453SJ. Bruce Fields } 2656f459e453SJ. Bruce Fields 26578b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26588b289b2cSJ. Bruce Fields { 26598b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 26608b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 26618b289b2cSJ. Bruce Fields } 26628b289b2cSJ. Bruce Fields 2663b37ad28bSAl Viro static __be32 266438c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2665567d9829SNeilBrown struct nfs4_delegation **dp) 2666567d9829SNeilBrown { 2667567d9829SNeilBrown int flags; 2668b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2669567d9829SNeilBrown 267038c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2671567d9829SNeilBrown if (*dp == NULL) 2672c44c5eebSNeilBrown goto out; 267324a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2674567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2675567d9829SNeilBrown if (status) 2676567d9829SNeilBrown *dp = NULL; 2677c44c5eebSNeilBrown out: 26788b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2679c44c5eebSNeilBrown return nfs_ok; 2680c44c5eebSNeilBrown if (status) 2681c44c5eebSNeilBrown return status; 2682dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2683c44c5eebSNeilBrown return nfs_ok; 2684567d9829SNeilBrown } 2685567d9829SNeilBrown 2686b37ad28bSAl Viro static __be32 2687dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 26881da177e4SLinus Torvalds { 2689dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2690fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 26911da177e4SLinus Torvalds 26928beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 26931da177e4SLinus Torvalds /* ignore lock owners */ 26941da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 26951da177e4SLinus Torvalds continue; 26961da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2697fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 26981da177e4SLinus Torvalds *stpp = local; 26991da177e4SLinus Torvalds /* check for conflicting share reservations */ 27001da177e4SLinus Torvalds if (!test_share(local, open)) 270177eaae8dSJ. Bruce Fields return nfserr_share_denied; 27021da177e4SLinus Torvalds } 270377eaae8dSJ. Bruce Fields return nfs_ok; 27041da177e4SLinus Torvalds } 27051da177e4SLinus Torvalds 2706996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2707996e0938SJ. Bruce Fields { 2708996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 27095ac049acSNeilBrown } 27105ac049acSNeilBrown 271121fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 271221fb4016SJ. Bruce Fields { 271321fb4016SJ. Bruce Fields int flags = 0; 271421fb4016SJ. Bruce Fields 271521fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 271621fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 271721fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 271821fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 271921fb4016SJ. Bruce Fields return flags; 272021fb4016SJ. Bruce Fields } 272121fb4016SJ. Bruce Fields 27220c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27230c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2724f9d7562fSJ. Bruce Fields { 2725f9d7562fSJ. Bruce Fields __be32 status; 27260c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27270c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27280c12eaffSCasey Bodley 2729f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2730f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2731f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2732f9d7562fSJ. Bruce Fields if (status) 2733f9d7562fSJ. Bruce Fields return status; 2734f9d7562fSJ. Bruce Fields } 2735f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2736f9d7562fSJ. Bruce Fields 2737f9d7562fSJ. Bruce Fields return nfs_ok; 2738f9d7562fSJ. Bruce Fields } 2739f9d7562fSJ. Bruce Fields 2740b37ad28bSAl Viro static inline __be32 27411da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27421da177e4SLinus Torvalds struct nfsd4_open *open) 27431da177e4SLinus Torvalds { 27441da177e4SLinus Torvalds struct iattr iattr = { 27451da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27461da177e4SLinus Torvalds .ia_size = 0, 27471da177e4SLinus Torvalds }; 27481da177e4SLinus Torvalds if (!open->op_truncate) 27491da177e4SLinus Torvalds return 0; 27501da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27519246585aSAl Viro return nfserr_inval; 27521da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27531da177e4SLinus Torvalds } 27541da177e4SLinus Torvalds 2755b37ad28bSAl Viro static __be32 2756dcef0413SJ. 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) 27571da177e4SLinus Torvalds { 2758b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27597d947842SJ. Bruce Fields bool new_access; 2760b37ad28bSAl Viro __be32 status; 27611da177e4SLinus Torvalds 276282c5ff1bSJeff Layton new_access = !test_access(op_share_access, stp); 2763f9d7562fSJ. Bruce Fields if (new_access) { 27640c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2765f9d7562fSJ. Bruce Fields if (status) 2766f9d7562fSJ. Bruce Fields return status; 27676c26d08fSJ. Bruce Fields } 27681da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 27691da177e4SLinus Torvalds if (status) { 2770f9d7562fSJ. Bruce Fields if (new_access) { 2771f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2772f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2773f9d7562fSJ. Bruce Fields } 27741da177e4SLinus Torvalds return status; 27751da177e4SLinus Torvalds } 27761da177e4SLinus Torvalds /* remember the open */ 277782c5ff1bSJeff Layton set_access(op_share_access, stp); 2778ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 27791da177e4SLinus Torvalds 27801da177e4SLinus Torvalds return nfs_ok; 27811da177e4SLinus Torvalds } 27821da177e4SLinus Torvalds 27831da177e4SLinus Torvalds 27841da177e4SLinus Torvalds static void 27851255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 27861da177e4SLinus Torvalds { 2787dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 27881da177e4SLinus Torvalds } 27891da177e4SLinus Torvalds 279014a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 279114a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 279214a24e99SJ. Bruce Fields { 279314a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 279414a24e99SJ. Bruce Fields return true; 279514a24e99SJ. Bruce Fields /* 279614a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 279714a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 279814a24e99SJ. Bruce Fields * until we hear otherwise: 279914a24e99SJ. Bruce Fields */ 280014a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 280114a24e99SJ. Bruce Fields } 280214a24e99SJ. Bruce Fields 280322d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 280422d38c4cSJ. Bruce Fields { 280522d38c4cSJ. Bruce Fields struct file_lock *fl; 280622d38c4cSJ. Bruce Fields 280722d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 280822d38c4cSJ. Bruce Fields if (!fl) 280922d38c4cSJ. Bruce Fields return NULL; 281022d38c4cSJ. Bruce Fields locks_init_lock(fl); 281122d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 281222d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 281322d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 281422d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2815acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 281622d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 281722d38c4cSJ. Bruce Fields return fl; 281822d38c4cSJ. Bruce Fields } 281922d38c4cSJ. Bruce Fields 2820edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2821edab9782SJ. Bruce Fields { 2822acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2823edab9782SJ. Bruce Fields struct file_lock *fl; 2824edab9782SJ. Bruce Fields int status; 2825edab9782SJ. Bruce Fields 2826edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2827edab9782SJ. Bruce Fields if (!fl) 2828edab9782SJ. Bruce Fields return -ENOMEM; 2829acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28302a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2831acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2832edab9782SJ. Bruce Fields if (status) { 2833acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2834edab9782SJ. Bruce Fields locks_free_lock(fl); 2835edab9782SJ. Bruce Fields return -ENOMEM; 2836edab9782SJ. Bruce Fields } 2837acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2838acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2839acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2840acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2841acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2842acfdf5c3SJ. Bruce Fields return 0; 2843acfdf5c3SJ. Bruce Fields } 2844acfdf5c3SJ. Bruce Fields 2845acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2846acfdf5c3SJ. Bruce Fields { 2847acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2848acfdf5c3SJ. Bruce Fields 2849acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2850acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2851acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2852acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2853acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2854acfdf5c3SJ. Bruce Fields return -EAGAIN; 2855acfdf5c3SJ. Bruce Fields } 2856acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2857acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2858acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28592a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2860edab9782SJ. Bruce Fields return 0; 2861edab9782SJ. Bruce Fields } 2862edab9782SJ. Bruce Fields 28634aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 28644aa8913cSBenny Halevy { 28654aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 28664aa8913cSBenny Halevy if (status == -EAGAIN) 28674aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 28684aa8913cSBenny Halevy else { 28694aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 28704aa8913cSBenny Halevy switch (open->op_deleg_want) { 28714aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 28724aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 28734aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 28744aa8913cSBenny Halevy break; 28754aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 28764aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 28774aa8913cSBenny Halevy break; 28784aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 28794aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 28804aa8913cSBenny Halevy } 28814aa8913cSBenny Halevy } 28824aa8913cSBenny Halevy } 28834aa8913cSBenny Halevy 28841da177e4SLinus Torvalds /* 28851da177e4SLinus Torvalds * Attempt to hand out a delegation. 28861da177e4SLinus Torvalds */ 28871da177e4SLinus Torvalds static void 2888*5ccb0066SStanislav Kinsbursky nfs4_open_delegation(struct net *net, struct svc_fh *fh, 2889*5ccb0066SStanislav Kinsbursky struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 28901da177e4SLinus Torvalds { 28911da177e4SLinus Torvalds struct nfs4_delegation *dp; 2892fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 289314a24e99SJ. Bruce Fields int cb_up; 2894d24433cdSBenny Halevy int status = 0, flag = 0; 28951da177e4SLinus Torvalds 2896fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 28971da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 28987b190fecSNeilBrown open->op_recall = 0; 28997b190fecSNeilBrown switch (open->op_claim_type) { 29007b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29012bf23875SJ. Bruce Fields if (!cb_up) 29027b190fecSNeilBrown open->op_recall = 1; 29037b190fecSNeilBrown flag = open->op_delegate_type; 29047b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29051da177e4SLinus Torvalds goto out; 29067b190fecSNeilBrown break; 29077b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29087b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29097b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2910*5ccb0066SStanislav Kinsbursky if (locks_in_grace(net)) 29117b190fecSNeilBrown goto out; 2912dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29137b190fecSNeilBrown goto out; 29141da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29151da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29161da177e4SLinus Torvalds else 29171da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29187b190fecSNeilBrown break; 29197b190fecSNeilBrown default: 29207b190fecSNeilBrown goto out; 29217b190fecSNeilBrown } 29221da177e4SLinus Torvalds 2923fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2924dd239cc0SJ. Bruce Fields if (dp == NULL) 2925dd239cc0SJ. Bruce Fields goto out_no_deleg; 2926acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2927edab9782SJ. Bruce Fields if (status) 2928dd239cc0SJ. Bruce Fields goto out_free; 29291da177e4SLinus Torvalds 2930d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29311da177e4SLinus Torvalds 29328c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2933d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29341da177e4SLinus Torvalds out: 29351da177e4SLinus Torvalds open->op_delegate_type = flag; 2936d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2937d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2938d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2939d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2940d24433cdSBenny Halevy 29414aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29424aa8913cSBenny Halevy if (open->op_deleg_want) 29434aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2944d24433cdSBenny Halevy } 2945dd239cc0SJ. Bruce Fields return; 2946dd239cc0SJ. Bruce Fields out_free: 2947acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2948dd239cc0SJ. Bruce Fields out_no_deleg: 2949dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2950dd239cc0SJ. Bruce Fields goto out; 29511da177e4SLinus Torvalds } 29521da177e4SLinus Torvalds 2953e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 2954e27f49c3SBenny Halevy struct nfs4_delegation *dp) 2955e27f49c3SBenny Halevy { 2956e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 2957e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2958e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2959e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 2960e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 2961e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2962e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2963e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 2964e27f49c3SBenny Halevy } 2965e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 2966e27f49c3SBenny Halevy * it already has, therefore we don't return 2967e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 2968e27f49c3SBenny Halevy */ 2969e27f49c3SBenny Halevy } 2970e27f49c3SBenny Halevy 29711da177e4SLinus Torvalds /* 29721da177e4SLinus Torvalds * called with nfs4_lock_state() held. 29731da177e4SLinus Torvalds */ 2974b37ad28bSAl Viro __be32 29751da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 29761da177e4SLinus Torvalds { 29776668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 297838c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 29791da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 29801da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2981dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 2982567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2983b37ad28bSAl Viro __be32 status; 29841da177e4SLinus Torvalds 29851da177e4SLinus Torvalds /* 29861da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 29871da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 29881da177e4SLinus Torvalds * If not found, create the nfs4_file struct 29891da177e4SLinus Torvalds */ 29901da177e4SLinus Torvalds fp = find_file(ino); 29911da177e4SLinus Torvalds if (fp) { 29921da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 29931da177e4SLinus Torvalds goto out; 299438c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 2995c44c5eebSNeilBrown if (status) 2996c44c5eebSNeilBrown goto out; 29971da177e4SLinus Torvalds } else { 2998c44c5eebSNeilBrown status = nfserr_bad_stateid; 29998b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3000c44c5eebSNeilBrown goto out; 30013e772463SJ. Bruce Fields status = nfserr_jukebox; 300232513b40SJ. Bruce Fields fp = open->op_file; 300332513b40SJ. Bruce Fields open->op_file = NULL; 300432513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30051da177e4SLinus Torvalds } 30061da177e4SLinus Torvalds 30071da177e4SLinus Torvalds /* 30081da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30091da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30101da177e4SLinus Torvalds */ 30111da177e4SLinus Torvalds if (stp) { 30121da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3013f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30141da177e4SLinus Torvalds if (status) 30151da177e4SLinus Torvalds goto out; 30161da177e4SLinus Torvalds } else { 30174cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3018567d9829SNeilBrown if (status) 30191da177e4SLinus Torvalds goto out; 30204af82504SJ. Bruce Fields status = nfsd4_truncate(rqstp, current_fh, open); 30214af82504SJ. Bruce Fields if (status) 30224af82504SJ. Bruce Fields goto out; 30234cdc951bSJ. Bruce Fields stp = open->op_stp; 30244cdc951bSJ. Bruce Fields open->op_stp = NULL; 3025996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30261da177e4SLinus Torvalds } 3027dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3028dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30291da177e4SLinus Torvalds 3030d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3031dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30326668958fSAndy Adamson 3033d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3034d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3035d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3036d24433cdSBenny Halevy goto nodeleg; 3037d24433cdSBenny Halevy } 3038d24433cdSBenny Halevy } 3039d24433cdSBenny Halevy 30401da177e4SLinus Torvalds /* 30411da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30421da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30431da177e4SLinus Torvalds */ 3044*5ccb0066SStanislav Kinsbursky nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); 3045d24433cdSBenny Halevy nodeleg: 30461da177e4SLinus Torvalds status = nfs_ok; 30471da177e4SLinus Torvalds 30488c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3049dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30501da177e4SLinus Torvalds out: 3051d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3052d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3053e27f49c3SBenny Halevy open->op_deleg_want) 3054e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3055d24433cdSBenny Halevy 305613cd2184SNeilBrown if (fp) 305713cd2184SNeilBrown put_nfs4_file(fp); 305837515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 30591255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 30601da177e4SLinus Torvalds /* 30611da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 30621da177e4SLinus Torvalds */ 30631da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3064dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 30656668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 30661da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 30671da177e4SLinus Torvalds 30681da177e4SLinus Torvalds return status; 30691da177e4SLinus Torvalds } 30701da177e4SLinus Torvalds 3071d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3072d29b20cdSJ. Bruce Fields { 3073d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3074d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3075d29b20cdSJ. Bruce Fields 3076d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3077d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3078d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3079d29b20cdSJ. Bruce Fields if (status) { 3080d29b20cdSJ. Bruce Fields release_openowner(oo); 3081d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3082d29b20cdSJ. Bruce Fields } else 3083d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3084d29b20cdSJ. Bruce Fields } 3085d29b20cdSJ. Bruce Fields } 308632513b40SJ. Bruce Fields if (open->op_file) 308732513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 30884cdc951bSJ. Bruce Fields if (open->op_stp) 30894cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3090d29b20cdSJ. Bruce Fields } 3091d29b20cdSJ. Bruce Fields 3092b37ad28bSAl Viro __be32 3093b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3094b591480bSJ.Bruce Fields clientid_t *clid) 30951da177e4SLinus Torvalds { 30961da177e4SLinus Torvalds struct nfs4_client *clp; 3097b37ad28bSAl Viro __be32 status; 30981da177e4SLinus Torvalds 30991da177e4SLinus Torvalds nfs4_lock_state(); 31001da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31011da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31021da177e4SLinus Torvalds status = nfserr_stale_clientid; 31031da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 31041da177e4SLinus Torvalds goto out; 31051da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31061da177e4SLinus Torvalds status = nfserr_expired; 31071da177e4SLinus Torvalds if (clp == NULL) { 31081da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31091da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31101da177e4SLinus Torvalds goto out; 31111da177e4SLinus Torvalds } 31121da177e4SLinus Torvalds status = nfserr_cb_path_down; 3113ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 311477a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31151da177e4SLinus Torvalds goto out; 31161da177e4SLinus Torvalds status = nfs_ok; 31171da177e4SLinus Torvalds out: 31181da177e4SLinus Torvalds nfs4_unlock_state(); 31191da177e4SLinus Torvalds return status; 31201da177e4SLinus Torvalds } 31211da177e4SLinus Torvalds 312233dcc481SJeff Layton static bool grace_ended; 312333dcc481SJeff Layton 3124a76b4319SNeilBrown static void 31255e1533c7SStanislav Kinsbursky nfsd4_end_grace(struct net *net) 3126a76b4319SNeilBrown { 31275e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 31285e1533c7SStanislav Kinsbursky 312933dcc481SJeff Layton /* do nothing if grace period already ended */ 313033dcc481SJeff Layton if (grace_ended) 313133dcc481SJeff Layton return; 313233dcc481SJeff Layton 3133a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 313433dcc481SJeff Layton grace_ended = true; 31355e1533c7SStanislav Kinsbursky nfsd4_record_grace_done(net, boot_time); 31365e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 3137e46b498cSJ. Bruce Fields /* 3138e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3139e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3140e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3141e46b498cSJ. Bruce Fields */ 3142e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3143a76b4319SNeilBrown } 3144a76b4319SNeilBrown 3145fd39ca9aSNeilBrown static time_t 31461da177e4SLinus Torvalds nfs4_laundromat(void) 31471da177e4SLinus Torvalds { 31481da177e4SLinus Torvalds struct nfs4_client *clp; 3149fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31501da177e4SLinus Torvalds struct nfs4_delegation *dp; 31511da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3152cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3153cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3154cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 31551da177e4SLinus Torvalds 31561da177e4SLinus Torvalds nfs4_lock_state(); 31571da177e4SLinus Torvalds 31581da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 31595e1533c7SStanislav Kinsbursky nfsd4_end_grace(&init_net); 316036acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 316136acb66bSBenny Halevy spin_lock(&client_lock); 31621da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 31631da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 31641da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 31651da177e4SLinus Torvalds t = clp->cl_time - cutoff; 31661da177e4SLinus Torvalds if (clientid_val > t) 31671da177e4SLinus Torvalds clientid_val = t; 31681da177e4SLinus Torvalds break; 31691da177e4SLinus Torvalds } 3170d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3171d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3172d7682988SBenny Halevy clp->cl_clientid.cl_id); 3173d7682988SBenny Halevy continue; 3174d7682988SBenny Halevy } 3175d7682988SBenny Halevy unhash_client_locked(clp); 3176d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 317736acb66bSBenny Halevy } 317836acb66bSBenny Halevy spin_unlock(&client_lock); 317936acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 318036acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 31811da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 31821da177e4SLinus Torvalds clp->cl_clientid.cl_id); 31832a4317c5SJeff Layton nfsd4_client_record_remove(clp); 31841da177e4SLinus Torvalds expire_client(clp); 31851da177e4SLinus Torvalds } 31861da177e4SLinus Torvalds spin_lock(&recall_lock); 31871da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 31881da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 31891da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 31901da177e4SLinus Torvalds u = dp->dl_time - cutoff; 31911da177e4SLinus Torvalds if (test_val > u) 31921da177e4SLinus Torvalds test_val = u; 31931da177e4SLinus Torvalds break; 31941da177e4SLinus Torvalds } 31951da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 31961da177e4SLinus Torvalds } 31971da177e4SLinus Torvalds spin_unlock(&recall_lock); 31981da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 31991da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32001da177e4SLinus Torvalds unhash_delegation(dp); 32011da177e4SLinus Torvalds } 3202cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32031da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3204fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3205fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3206fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32071da177e4SLinus Torvalds if (test_val > u) 32081da177e4SLinus Torvalds test_val = u; 32091da177e4SLinus Torvalds break; 32101da177e4SLinus Torvalds } 3211fe0750e5SJ. Bruce Fields release_openowner(oo); 32121da177e4SLinus Torvalds } 32131da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32141da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32151da177e4SLinus Torvalds nfs4_unlock_state(); 32161da177e4SLinus Torvalds return clientid_val; 32171da177e4SLinus Torvalds } 32181da177e4SLinus Torvalds 3219a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3220a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3221a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3222a254b246SHarvey Harrison 3223a254b246SHarvey Harrison static void 3224c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32251da177e4SLinus Torvalds { 32261da177e4SLinus Torvalds time_t t; 32271da177e4SLinus Torvalds 32281da177e4SLinus Torvalds t = nfs4_laundromat(); 32291da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 323058da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32311da177e4SLinus Torvalds } 32321da177e4SLinus Torvalds 3233f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3234f8816512SNeilBrown { 3235f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3236f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3237f7a4d872SJ. Bruce Fields return nfs_ok; 32381da177e4SLinus Torvalds } 32391da177e4SLinus Torvalds 32401da177e4SLinus Torvalds static int 32411da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 32421da177e4SLinus Torvalds { 3243d3b313a4SJ. Bruce Fields if (stateid->si_opaque.so_clid.cl_boot == boot_time) 3244e4e83ea4SJ. Bruce Fields return 0; 32458c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32468c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32471da177e4SLinus Torvalds return 1; 32481da177e4SLinus Torvalds } 32491da177e4SLinus Torvalds 32501da177e4SLinus Torvalds static inline int 325182c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 32521da177e4SLinus Torvalds { 325382c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 325482c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 325582c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 32561da177e4SLinus Torvalds } 32571da177e4SLinus Torvalds 32581da177e4SLinus Torvalds static inline int 325982c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 32601da177e4SLinus Torvalds { 326182c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 326282c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 32631da177e4SLinus Torvalds } 32641da177e4SLinus Torvalds 32651da177e4SLinus Torvalds static 3266dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 32671da177e4SLinus Torvalds { 3268b37ad28bSAl Viro __be32 status = nfserr_openmode; 32691da177e4SLinus Torvalds 327002921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 327102921914SJ. Bruce Fields if (stp->st_openstp) 327202921914SJ. Bruce Fields stp = stp->st_openstp; 327382c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 32741da177e4SLinus Torvalds goto out; 327582c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 32761da177e4SLinus Torvalds goto out; 32771da177e4SLinus Torvalds status = nfs_ok; 32781da177e4SLinus Torvalds out: 32791da177e4SLinus Torvalds return status; 32801da177e4SLinus Torvalds } 32811da177e4SLinus Torvalds 3282b37ad28bSAl Viro static inline __be32 3283*5ccb0066SStanislav Kinsbursky check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) 32841da177e4SLinus Torvalds { 3285203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 32861da177e4SLinus Torvalds return nfs_ok; 3287*5ccb0066SStanislav Kinsbursky else if (locks_in_grace(net)) { 328825985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 32891da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 32901da177e4SLinus Torvalds return nfserr_grace; 32911da177e4SLinus Torvalds } else if (flags & WR_STATE) 32921da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32931da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 32941da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 32951da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32961da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 32971da177e4SLinus Torvalds } 32981da177e4SLinus Torvalds 32991da177e4SLinus Torvalds /* 33001da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33011da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33021da177e4SLinus Torvalds */ 33031da177e4SLinus Torvalds static inline int 3304*5ccb0066SStanislav Kinsbursky grace_disallows_io(struct net *net, struct inode *inode) 33051da177e4SLinus Torvalds { 3306*5ccb0066SStanislav Kinsbursky return locks_in_grace(net) && mandatory_lock(inode); 33071da177e4SLinus Torvalds } 33081da177e4SLinus Torvalds 330981b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 331081b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 331181b82965SJ. Bruce Fields { 331281b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 331381b82965SJ. Bruce Fields } 331481b82965SJ. Bruce Fields 331557b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33160836f587SJ. Bruce Fields { 33176668958fSAndy Adamson /* 33186668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33196668958fSAndy Adamson * when it is zero. 33206668958fSAndy Adamson */ 332128dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 332281b82965SJ. Bruce Fields return nfs_ok; 332381b82965SJ. Bruce Fields 332481b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 332581b82965SJ. Bruce Fields return nfs_ok; 33266668958fSAndy Adamson 33270836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 332881b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33290836f587SJ. Bruce Fields return nfserr_bad_stateid; 33300836f587SJ. Bruce Fields /* 333181b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 333281b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 333381b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 333481b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 333581b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 333681b82965SJ. Bruce Fields * but better performance may result in retrying IO that 333781b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 333881b82965SJ. Bruce Fields * reordered in flight: 33390836f587SJ. Bruce Fields */ 33400836f587SJ. Bruce Fields return nfserr_old_stateid; 33410836f587SJ. Bruce Fields } 33420836f587SJ. Bruce Fields 33437df302f7SChuck Lever static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 334417456804SBryan Schumaker { 334597b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 334697b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 334797b7e3b6SJ. Bruce Fields __be32 status; 334817456804SBryan Schumaker 33497df302f7SChuck Lever if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 33507df302f7SChuck Lever return nfserr_bad_stateid; 33517df302f7SChuck Lever /* Client debugging aid. */ 33527df302f7SChuck Lever if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { 33537df302f7SChuck Lever char addr_str[INET6_ADDRSTRLEN]; 33547df302f7SChuck Lever rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, 33557df302f7SChuck Lever sizeof(addr_str)); 33567df302f7SChuck Lever pr_warn_ratelimited("NFSD: client %s testing state ID " 33577df302f7SChuck Lever "with incorrect client ID\n", addr_str); 33587df302f7SChuck Lever return nfserr_bad_stateid; 33597df302f7SChuck Lever } 336038c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 336197b7e3b6SJ. Bruce Fields if (!s) 33627df302f7SChuck Lever return nfserr_bad_stateid; 336336279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 336417456804SBryan Schumaker if (status) 336517456804SBryan Schumaker return status; 336697b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 336797b7e3b6SJ. Bruce Fields return nfs_ok; 336897b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 336997b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3370dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 337197b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 337297b7e3b6SJ. Bruce Fields return nfs_ok; 337317456804SBryan Schumaker } 337417456804SBryan Schumaker 337538c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 337638c2f4b1SJ. Bruce Fields { 337738c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 337838c2f4b1SJ. Bruce Fields 337938c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 338038c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 338138c2f4b1SJ. Bruce Fields if (STALE_STATEID(stateid)) 338238c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 338338c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 338438c2f4b1SJ. Bruce Fields if (!cl) 338538c2f4b1SJ. Bruce Fields return nfserr_expired; 338638c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 338738c2f4b1SJ. Bruce Fields if (!*s) 338838c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 338938c2f4b1SJ. Bruce Fields return nfs_ok; 339038c2f4b1SJ. Bruce Fields 339138c2f4b1SJ. Bruce Fields } 339238c2f4b1SJ. Bruce Fields 33931da177e4SLinus Torvalds /* 33941da177e4SLinus Torvalds * Checks for stateid operations 33951da177e4SLinus Torvalds */ 3396b37ad28bSAl Viro __be32 3397*5ccb0066SStanislav Kinsbursky nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, 3398dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 33991da177e4SLinus Torvalds { 340069064a27SJ. Bruce Fields struct nfs4_stid *s; 3401dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34021da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3403dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34041da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3405b37ad28bSAl Viro __be32 status; 34061da177e4SLinus Torvalds 34071da177e4SLinus Torvalds if (filpp) 34081da177e4SLinus Torvalds *filpp = NULL; 34091da177e4SLinus Torvalds 3410*5ccb0066SStanislav Kinsbursky if (grace_disallows_io(net, ino)) 34111da177e4SLinus Torvalds return nfserr_grace; 34121da177e4SLinus Torvalds 34131da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3414*5ccb0066SStanislav Kinsbursky return check_special_stateids(net, current_fh, stateid, flags); 34151da177e4SLinus Torvalds 341638c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 341738c2f4b1SJ. Bruce Fields if (status) 341838c2f4b1SJ. Bruce Fields return status; 341969064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34200c2a498fSJ. Bruce Fields if (status) 34210c2a498fSJ. Bruce Fields goto out; 3422f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3423f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 342469064a27SJ. Bruce Fields dp = delegstateid(s); 3425dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3426dc9bf700SJ. Bruce Fields if (status) 3427dc9bf700SJ. Bruce Fields goto out; 342843b0178eSDan Carpenter if (filpp) { 3429acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3430f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 343143b0178eSDan Carpenter } 3432f7a4d872SJ. Bruce Fields break; 3433f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3434f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 343569064a27SJ. Bruce Fields stp = openlockstateid(s); 3436f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3437f7a4d872SJ. Bruce Fields if (status) 34381da177e4SLinus Torvalds goto out; 3439fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3440dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34411da177e4SLinus Torvalds goto out; 3442a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3443a4455be0SJ. Bruce Fields if (status) 34441da177e4SLinus Torvalds goto out; 3445f9d7562fSJ. Bruce Fields if (filpp) { 3446f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3447f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3448f9d7562fSJ. Bruce Fields else 3449f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3450f9d7562fSJ. Bruce Fields } 3451f7a4d872SJ. Bruce Fields break; 3452f7a4d872SJ. Bruce Fields default: 3453f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 34541da177e4SLinus Torvalds } 34551da177e4SLinus Torvalds status = nfs_ok; 34561da177e4SLinus Torvalds out: 34571da177e4SLinus Torvalds return status; 34581da177e4SLinus Torvalds } 34591da177e4SLinus Torvalds 3460e1ca12dfSBryan Schumaker static __be32 3461dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3462e1ca12dfSBryan Schumaker { 3463fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3464e1ca12dfSBryan Schumaker return nfserr_locks_held; 3465e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3466e1ca12dfSBryan Schumaker return nfs_ok; 3467e1ca12dfSBryan Schumaker } 3468e1ca12dfSBryan Schumaker 3469e1ca12dfSBryan Schumaker /* 347017456804SBryan Schumaker * Test if the stateid is valid 347117456804SBryan Schumaker */ 347217456804SBryan Schumaker __be32 347317456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 347417456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 347517456804SBryan Schumaker { 347603cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 347703cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 347803cfb420SBryan Schumaker 347903cfb420SBryan Schumaker nfs4_lock_state(); 348003cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 34817df302f7SChuck Lever stateid->ts_id_status = 34827df302f7SChuck Lever nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); 348303cfb420SBryan Schumaker nfs4_unlock_state(); 348403cfb420SBryan Schumaker 348517456804SBryan Schumaker return nfs_ok; 348617456804SBryan Schumaker } 348717456804SBryan Schumaker 3488e1ca12dfSBryan Schumaker __be32 3489e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3490e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3491e1ca12dfSBryan Schumaker { 3492e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 34932da1cec7SJ. Bruce Fields struct nfs4_stid *s; 349438c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 34952da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3496e1ca12dfSBryan Schumaker 3497e1ca12dfSBryan Schumaker nfs4_lock_state(); 349838c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 34992da1cec7SJ. Bruce Fields if (!s) 3500e1ca12dfSBryan Schumaker goto out; 35012da1cec7SJ. Bruce Fields switch (s->sc_type) { 35022da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3503e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3504e1ca12dfSBryan Schumaker goto out; 35052da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35062da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35072da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35082da1cec7SJ. Bruce Fields if (ret) 3509e1ca12dfSBryan Schumaker goto out; 35102da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35112da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35122da1cec7SJ. Bruce Fields else 35132da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3514f7a4d872SJ. Bruce Fields break; 3515f7a4d872SJ. Bruce Fields default: 3516f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3517e1ca12dfSBryan Schumaker } 3518e1ca12dfSBryan Schumaker out: 3519e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3520e1ca12dfSBryan Schumaker return ret; 3521e1ca12dfSBryan Schumaker } 3522e1ca12dfSBryan Schumaker 35234c4cd222SNeilBrown static inline int 35244c4cd222SNeilBrown setlkflg (int type) 35254c4cd222SNeilBrown { 35264c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35274c4cd222SNeilBrown RD_STATE : WR_STATE; 35284c4cd222SNeilBrown } 35291da177e4SLinus Torvalds 3530dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3531c0a5d93eSJ. Bruce Fields { 3532c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3533c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3534c0a5d93eSJ. Bruce Fields __be32 status; 3535c0a5d93eSJ. Bruce Fields 3536c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3537c0a5d93eSJ. Bruce Fields if (status) 3538c0a5d93eSJ. Bruce Fields return status; 3539f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3540f7a4d872SJ. Bruce Fields /* 3541f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3542f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3543f7a4d872SJ. Bruce Fields */ 3544f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3545f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3546f7a4d872SJ. Bruce Fields if (status) 3547f7a4d872SJ. Bruce Fields return status; 3548f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3549c0a5d93eSJ. Bruce Fields } 3550c0a5d93eSJ. Bruce Fields 35511da177e4SLinus Torvalds /* 35521da177e4SLinus Torvalds * Checks for sequence id mutating operations. 35531da177e4SLinus Torvalds */ 3554b37ad28bSAl Viro static __be32 3555dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 35562288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3557dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 35581da177e4SLinus Torvalds { 35590836f587SJ. Bruce Fields __be32 status; 356038c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 35611da177e4SLinus Torvalds 35628c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 35638c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 35641da177e4SLinus Torvalds 35651da177e4SLinus Torvalds *stpp = NULL; 356638c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3567c0a5d93eSJ. Bruce Fields if (status) 3568c0a5d93eSJ. Bruce Fields return status; 356938c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3570c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 35711da177e4SLinus Torvalds 3572c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 35731da177e4SLinus Torvalds } 35741da177e4SLinus Torvalds 3575dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3576c0a5d93eSJ. Bruce Fields { 3577c0a5d93eSJ. Bruce Fields __be32 status; 3578c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 35791da177e4SLinus Torvalds 3580c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 35812288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 35820836f587SJ. Bruce Fields if (status) 35830836f587SJ. Bruce Fields return status; 3584c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3585dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3586c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 35873a4f98bbSNeilBrown return nfs_ok; 35881da177e4SLinus Torvalds } 35891da177e4SLinus Torvalds 3590b37ad28bSAl Viro __be32 3591ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3592a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 35931da177e4SLinus Torvalds { 3594b37ad28bSAl Viro __be32 status; 3595fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3596dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 35971da177e4SLinus Torvalds 35981da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3599ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3600ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36011da177e4SLinus Torvalds 3602ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3603a8cddc5dSJ. Bruce Fields if (status) 3604a8cddc5dSJ. Bruce Fields return status; 36051da177e4SLinus Torvalds 36061da177e4SLinus Torvalds nfs4_lock_state(); 36071da177e4SLinus Torvalds 36089072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3609ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36102288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36119072d5c6SJ. Bruce Fields if (status) 36121da177e4SLinus Torvalds goto out; 3613fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 361468b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3615dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 361668b66e82SJ. Bruce Fields goto out; 3617dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3618dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3619dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36208c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3621dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3622c7b9a459SNeilBrown 36232a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 362468b66e82SJ. Bruce Fields status = nfs_ok; 36251da177e4SLinus Torvalds out: 36265ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36271da177e4SLinus Torvalds nfs4_unlock_state(); 36281da177e4SLinus Torvalds return status; 36291da177e4SLinus Torvalds } 36301da177e4SLinus Torvalds 36316409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36321da177e4SLinus Torvalds { 363382c5ff1bSJeff Layton if (!test_access(access, stp)) 36346409a5a6SJ. Bruce Fields return; 36356409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 363682c5ff1bSJeff Layton clear_access(access, stp); 3637f197c271SJ. Bruce Fields } 36386409a5a6SJ. Bruce Fields 36396409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36406409a5a6SJ. Bruce Fields { 36416409a5a6SJ. Bruce Fields switch (to_access) { 36426409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36436409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36446409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36456409a5a6SJ. Bruce Fields break; 36466409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36476409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36486409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36496409a5a6SJ. Bruce Fields break; 36506409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36516409a5a6SJ. Bruce Fields break; 36526409a5a6SJ. Bruce Fields default: 36536409a5a6SJ. Bruce Fields BUG(); 36541da177e4SLinus Torvalds } 36551da177e4SLinus Torvalds } 36561da177e4SLinus Torvalds 36571da177e4SLinus Torvalds static void 3658ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 36591da177e4SLinus Torvalds { 36601da177e4SLinus Torvalds int i; 36611da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 36621da177e4SLinus Torvalds if ((i & deny) != i) 3663ce0fc43cSJeff Layton clear_deny(i, stp); 36641da177e4SLinus Torvalds } 36651da177e4SLinus Torvalds } 36661da177e4SLinus Torvalds 3667b37ad28bSAl Viro __be32 3668ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3669ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3670a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 36711da177e4SLinus Torvalds { 3672b37ad28bSAl Viro __be32 status; 3673dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36741da177e4SLinus Torvalds 36751da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3676ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3677ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36781da177e4SLinus Torvalds 3679c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 36802c8bd7e0SBenny Halevy if (od->od_deleg_want) 36812c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 36822c8bd7e0SBenny Halevy od->od_deleg_want); 36831da177e4SLinus Torvalds 36841da177e4SLinus Torvalds nfs4_lock_state(); 3685c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3686c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 36879072d5c6SJ. Bruce Fields if (status) 36881da177e4SLinus Torvalds goto out; 36891da177e4SLinus Torvalds status = nfserr_inval; 369082c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 36911da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 36921da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 36931da177e4SLinus Torvalds goto out; 36941da177e4SLinus Torvalds } 3695ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 36961da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 36971da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 36981da177e4SLinus Torvalds goto out; 36991da177e4SLinus Torvalds } 37006409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37011da177e4SLinus Torvalds 3702ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 37031da177e4SLinus Torvalds 3704dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3705dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37061da177e4SLinus Torvalds status = nfs_ok; 37071da177e4SLinus Torvalds out: 37085ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37091da177e4SLinus Torvalds nfs4_unlock_state(); 37101da177e4SLinus Torvalds return status; 37111da177e4SLinus Torvalds } 37121da177e4SLinus Torvalds 371338c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 371438c387b5SJ. Bruce Fields { 371538c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 371638c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 371738c387b5SJ. Bruce Fields 371838c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 371938c387b5SJ. Bruce Fields return; 372038c387b5SJ. Bruce Fields oo = openowner(so); 372138c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 372238c387b5SJ. Bruce Fields if (!s) 372338c387b5SJ. Bruce Fields return; 372438c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 372538c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 372638c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 372738c387b5SJ. Bruce Fields return; 372838c387b5SJ. Bruce Fields } 372938c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3730f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3731f7a4d872SJ. Bruce Fields } 3732f7a4d872SJ. Bruce Fields 3733f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3734f7a4d872SJ. Bruce Fields { 3735f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3736f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 373738c387b5SJ. Bruce Fields } 373838c387b5SJ. Bruce Fields 37391da177e4SLinus Torvalds /* 37401da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37411da177e4SLinus Torvalds */ 3742b37ad28bSAl Viro __be32 3743ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3744a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37451da177e4SLinus Torvalds { 3746b37ad28bSAl Viro __be32 status; 3747fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3748dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37491da177e4SLinus Torvalds 37501da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3751ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3752ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37531da177e4SLinus Torvalds 37541da177e4SLinus Torvalds nfs4_lock_state(); 3755f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3756f7a4d872SJ. Bruce Fields &close->cl_stateid, 3757f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3758f7a4d872SJ. Bruce Fields &stp); 37599072d5c6SJ. Bruce Fields if (status) 37601da177e4SLinus Torvalds goto out; 3761fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 37621da177e4SLinus Torvalds status = nfs_ok; 3763dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3764dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37651da177e4SLinus Torvalds 3766f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 376738c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 376804ef5954SJ. Bruce Fields 376974dbafafSJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) { 377074dbafafSJ. Bruce Fields if (cstate->minorversion) { 377174dbafafSJ. Bruce Fields release_openowner(oo); 377274dbafafSJ. Bruce Fields cstate->replay_owner = NULL; 377374dbafafSJ. Bruce Fields } else { 377474dbafafSJ. Bruce Fields /* 377574dbafafSJ. Bruce Fields * In the 4.0 case we need to keep the owners around a 377674dbafafSJ. Bruce Fields * little while to handle CLOSE replay. 377704ef5954SJ. Bruce Fields */ 3778fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3779fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 378074dbafafSJ. Bruce Fields } 378174dbafafSJ. Bruce Fields } 37821da177e4SLinus Torvalds out: 37835ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37841da177e4SLinus Torvalds nfs4_unlock_state(); 37851da177e4SLinus Torvalds return status; 37861da177e4SLinus Torvalds } 37871da177e4SLinus Torvalds 3788b37ad28bSAl Viro __be32 3789ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3790ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 37911da177e4SLinus Torvalds { 3792203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3793203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 379438c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3795203a8c8eSJ. Bruce Fields struct inode *inode; 3796b37ad28bSAl Viro __be32 status; 37971da177e4SLinus Torvalds 3798ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3799203a8c8eSJ. Bruce Fields return status; 3800203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 38011da177e4SLinus Torvalds 38021da177e4SLinus Torvalds nfs4_lock_state(); 380338c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 380438c2f4b1SJ. Bruce Fields if (status) 3805203a8c8eSJ. Bruce Fields goto out; 380638c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3807d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3808203a8c8eSJ. Bruce Fields if (status) 3809203a8c8eSJ. Bruce Fields goto out; 3810203a8c8eSJ. Bruce Fields 3811203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38121da177e4SLinus Torvalds out: 3813203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3814203a8c8eSJ. Bruce Fields 38151da177e4SLinus Torvalds return status; 38161da177e4SLinus Torvalds } 38171da177e4SLinus Torvalds 38181da177e4SLinus Torvalds 38191da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38201da177e4SLinus Torvalds 3821009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3822009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3823009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38241da177e4SLinus Torvalds 382587df4de8SBenny Halevy static inline u64 382687df4de8SBenny Halevy end_offset(u64 start, u64 len) 382787df4de8SBenny Halevy { 382887df4de8SBenny Halevy u64 end; 382987df4de8SBenny Halevy 383087df4de8SBenny Halevy end = start + len; 383187df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 383287df4de8SBenny Halevy } 383387df4de8SBenny Halevy 383487df4de8SBenny Halevy /* last octet in a range */ 383587df4de8SBenny Halevy static inline u64 383687df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 383787df4de8SBenny Halevy { 383887df4de8SBenny Halevy u64 end; 383987df4de8SBenny Halevy 384087df4de8SBenny Halevy BUG_ON(!len); 384187df4de8SBenny Halevy end = start + len; 384287df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 384387df4de8SBenny Halevy } 384487df4de8SBenny Halevy 3845009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38461da177e4SLinus Torvalds { 38471da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38481da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3849009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38501da177e4SLinus Torvalds } 38511da177e4SLinus Torvalds 3852009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 38531da177e4SLinus Torvalds 38541da177e4SLinus Torvalds /* 38551da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38561da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38571da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38581da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38591da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 38601da177e4SLinus Torvalds * the VFS, but this is a very deep change! 38611da177e4SLinus Torvalds */ 38621da177e4SLinus Torvalds static inline void 38631da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 38641da177e4SLinus Torvalds { 38651da177e4SLinus Torvalds if (lock->fl_start < 0) 38661da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 38671da177e4SLinus Torvalds if (lock->fl_end < 0) 38681da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 38691da177e4SLinus Torvalds } 38701da177e4SLinus Torvalds 3871d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3872d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 38737b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3874d5b9026aSNeilBrown }; 38751da177e4SLinus Torvalds 38761da177e4SLinus Torvalds static inline void 38771da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 38781da177e4SLinus Torvalds { 3879fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 38801da177e4SLinus Torvalds 3881d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3882fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3883fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3884fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 38857c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 38867c13f344SJ. Bruce Fields /* We just don't care that much */ 38877c13f344SJ. Bruce Fields goto nevermind; 3888fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3889fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3890d5b9026aSNeilBrown } else { 38917c13f344SJ. Bruce Fields nevermind: 38927c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 38937c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3894d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3895d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 38961da177e4SLinus Torvalds } 38971da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 389887df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 389987df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 39001da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39011da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39021da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39031da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39041da177e4SLinus Torvalds } 39051da177e4SLinus Torvalds 3906b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3907b93d87c1SJ. Bruce Fields { 3908b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3909b93d87c1SJ. Bruce Fields 3910b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3911b93d87c1SJ. Bruce Fields return false; 3912b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3913b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3914b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3915b93d87c1SJ. Bruce Fields } 3916b93d87c1SJ. Bruce Fields 3917fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3918fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 39191da177e4SLinus Torvalds struct xdr_netobj *owner) 39201da177e4SLinus Torvalds { 3921009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3922b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39231da177e4SLinus Torvalds 3924009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3925b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3926b93d87c1SJ. Bruce Fields return lo; 39271da177e4SLinus Torvalds } 39281da177e4SLinus Torvalds return NULL; 39291da177e4SLinus Torvalds } 39301da177e4SLinus Torvalds 3931dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3932ff194bd9SJ. Bruce Fields { 3933009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3934009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3935009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3936009673b4SJ. Bruce Fields 393716bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3938009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3939fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3940ff194bd9SJ. Bruce Fields } 3941ff194bd9SJ. Bruce Fields 39421da177e4SLinus Torvalds /* 39431da177e4SLinus Torvalds * Alloc a lock owner structure. 39441da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 394525985edcSLucas De Marchi * occurred. 39461da177e4SLinus Torvalds * 394716bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39481da177e4SLinus Torvalds */ 39491da177e4SLinus Torvalds 3950fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3951dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3952fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39531da177e4SLinus Torvalds 3954fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3955fe0750e5SJ. Bruce Fields if (!lo) 39561da177e4SLinus Torvalds return NULL; 3957fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3958fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3959b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3960b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3961fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3962fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3963fe0750e5SJ. Bruce Fields return lo; 39641da177e4SLinus Torvalds } 39651da177e4SLinus Torvalds 3966dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3967dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 39681da177e4SLinus Torvalds { 3969dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 3970d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 39711da177e4SLinus Torvalds 3972996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 39735ac049acSNeilBrown if (stp == NULL) 39746136d2b4SJ. Bruce Fields return NULL; 3975996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 39768beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3977fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3978fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 397913cd2184SNeilBrown get_nfs4_file(fp); 39801da177e4SLinus Torvalds stp->st_file = fp; 39810997b173SJ. Bruce Fields stp->st_access_bmap = 0; 39821da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 39834c4cd222SNeilBrown stp->st_openstp = open_stp; 39841da177e4SLinus Torvalds return stp; 39851da177e4SLinus Torvalds } 39861da177e4SLinus Torvalds 3987fd39ca9aSNeilBrown static int 39881da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 39891da177e4SLinus Torvalds { 399087df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 39911da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 39921da177e4SLinus Torvalds } 39931da177e4SLinus Torvalds 3994dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 39950997b173SJ. Bruce Fields { 39960997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 39970997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 39980997b173SJ. Bruce Fields 399982c5ff1bSJeff Layton if (test_access(access, lock_stp)) 40000997b173SJ. Bruce Fields return; 40010997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 400282c5ff1bSJeff Layton set_access(access, lock_stp); 40030997b173SJ. Bruce Fields } 40040997b173SJ. Bruce Fields 40052355c596SJ. 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) 400664a284d0SJ. Bruce Fields { 400764a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 400864a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 400964a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 401064a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 401164a284d0SJ. Bruce Fields unsigned int strhashval; 401264a284d0SJ. Bruce Fields 401364a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 401464a284d0SJ. Bruce Fields if (lo) { 401564a284d0SJ. Bruce Fields if (!cstate->minorversion) 401664a284d0SJ. Bruce Fields return nfserr_bad_seqid; 401764a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 401864a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 401964a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 402064a284d0SJ. Bruce Fields return nfs_ok; 402164a284d0SJ. Bruce Fields } 402216bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 402364a284d0SJ. Bruce Fields &lock->v.new.owner); 402464a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 402564a284d0SJ. Bruce Fields if (lo == NULL) 402664a284d0SJ. Bruce Fields return nfserr_jukebox; 402764a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 402864a284d0SJ. Bruce Fields if (*lst == NULL) { 402964a284d0SJ. Bruce Fields release_lockowner(lo); 403064a284d0SJ. Bruce Fields return nfserr_jukebox; 403164a284d0SJ. Bruce Fields } 403264a284d0SJ. Bruce Fields *new = true; 403364a284d0SJ. Bruce Fields return nfs_ok; 403464a284d0SJ. Bruce Fields } 403564a284d0SJ. Bruce Fields 40361da177e4SLinus Torvalds /* 40371da177e4SLinus Torvalds * LOCK operation 40381da177e4SLinus Torvalds */ 4039b37ad28bSAl Viro __be32 4040ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4041a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40421da177e4SLinus Torvalds { 4043fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4044fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4045dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40467d947842SJ. Bruce Fields struct file *filp = NULL; 40471da177e4SLinus Torvalds struct file_lock file_lock; 40488dc7c311SAndy Adamson struct file_lock conflock; 4049b37ad28bSAl Viro __be32 status = 0; 405064a284d0SJ. Bruce Fields bool new_state = false; 4051b34f27aaSJ. Bruce Fields int lkflg; 4052b8dd7b9aSAl Viro int err; 40531da177e4SLinus Torvalds 40541da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40551da177e4SLinus Torvalds (long long) lock->lk_offset, 40561da177e4SLinus Torvalds (long long) lock->lk_length); 40571da177e4SLinus Torvalds 40581da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 40591da177e4SLinus Torvalds return nfserr_inval; 40601da177e4SLinus Torvalds 4061ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 40628837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4063a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4064a6f6ef2fSAndy Adamson return status; 4065a6f6ef2fSAndy Adamson } 4066a6f6ef2fSAndy Adamson 40671da177e4SLinus Torvalds nfs4_lock_state(); 40681da177e4SLinus Torvalds 40691da177e4SLinus Torvalds if (lock->lk_is_new) { 4070dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 40711da177e4SLinus Torvalds 4072684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4073684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4074684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4075684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4076684e5638SJ. Bruce Fields sizeof(clientid_t)); 4077684e5638SJ. Bruce Fields 40781da177e4SLinus Torvalds status = nfserr_stale_clientid; 4079684e5638SJ. Bruce Fields if (STALE_CLIENTID(&lock->lk_new_clientid)) 40801da177e4SLinus Torvalds goto out; 40811da177e4SLinus Torvalds 40821da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4083c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 40841da177e4SLinus Torvalds lock->lk_new_open_seqid, 40851da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4086c0a5d93eSJ. Bruce Fields &open_stp); 408737515177SNeilBrown if (status) 40881da177e4SLinus Torvalds goto out; 4089fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4090b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4091684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4092b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4093b34f27aaSJ. Bruce Fields goto out; 409464a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 409564a284d0SJ. Bruce Fields &lock_stp, &new_state); 4096e1aaa891SJ. Bruce Fields } else 4097dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 40981da177e4SLinus Torvalds lock->lk_old_lock_seqid, 40991da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41002288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 41011da177e4SLinus Torvalds if (status) 41021da177e4SLinus Torvalds goto out; 4103fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41041da177e4SLinus Torvalds 4105b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4106b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4107b34f27aaSJ. Bruce Fields if (status) 4108b34f27aaSJ. Bruce Fields goto out; 4109b34f27aaSJ. Bruce Fields 41100dd395dcSNeilBrown status = nfserr_grace; 4111*5ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) 41120dd395dcSNeilBrown goto out; 41130dd395dcSNeilBrown status = nfserr_no_grace; 4114*5ccb0066SStanislav Kinsbursky if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) 41150dd395dcSNeilBrown goto out; 41160dd395dcSNeilBrown 41171da177e4SLinus Torvalds locks_init_lock(&file_lock); 41181da177e4SLinus Torvalds switch (lock->lk_type) { 41191da177e4SLinus Torvalds case NFS4_READ_LT: 41201da177e4SLinus Torvalds case NFS4_READW_LT: 4121f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41220997b173SJ. Bruce Fields if (filp) 41230997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 41241da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41251da177e4SLinus Torvalds break; 41261da177e4SLinus Torvalds case NFS4_WRITE_LT: 41271da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4128f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41290997b173SJ. Bruce Fields if (filp) 41300997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 41311da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41321da177e4SLinus Torvalds break; 41331da177e4SLinus Torvalds default: 41341da177e4SLinus Torvalds status = nfserr_inval; 41351da177e4SLinus Torvalds goto out; 41361da177e4SLinus Torvalds } 4137f9d7562fSJ. Bruce Fields if (!filp) { 4138f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4139f9d7562fSJ. Bruce Fields goto out; 4140f9d7562fSJ. Bruce Fields } 4141b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 41421da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41431da177e4SLinus Torvalds file_lock.fl_file = filp; 41441da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4145d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 41461da177e4SLinus Torvalds 41471da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 414887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 41491da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41501da177e4SLinus Torvalds 41511da177e4SLinus Torvalds /* 41521da177e4SLinus Torvalds * Try to lock the file in the VFS. 41531da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 41541da177e4SLinus Torvalds */ 41551da177e4SLinus Torvalds 4156529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4157b8dd7b9aSAl Viro switch (-err) { 41581da177e4SLinus Torvalds case 0: /* success! */ 4159dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4160dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 41611da177e4SLinus Torvalds sizeof(stateid_t)); 4162b8dd7b9aSAl Viro status = 0; 4163eb76b3fdSAndy Adamson break; 4164eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4165eb76b3fdSAndy Adamson status = nfserr_denied; 4166eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4167eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4168eb76b3fdSAndy Adamson break; 41691da177e4SLinus Torvalds case (EDEADLK): 41701da177e4SLinus Torvalds status = nfserr_deadlock; 4171eb76b3fdSAndy Adamson break; 41721da177e4SLinus Torvalds default: 4173fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 41743e772463SJ. Bruce Fields status = nfserrno(err); 4175eb76b3fdSAndy Adamson break; 41761da177e4SLinus Torvalds } 41771da177e4SLinus Torvalds out: 417864a284d0SJ. Bruce Fields if (status && new_state) 4179f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 41805ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 41811da177e4SLinus Torvalds nfs4_unlock_state(); 41821da177e4SLinus Torvalds return status; 41831da177e4SLinus Torvalds } 41841da177e4SLinus Torvalds 41851da177e4SLinus Torvalds /* 418655ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 418755ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 418855ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 418955ef1274SJ. Bruce Fields * inode operation.) 419055ef1274SJ. Bruce Fields */ 419104da6e9dSAl Viro static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 419255ef1274SJ. Bruce Fields { 419355ef1274SJ. Bruce Fields struct file *file; 419404da6e9dSAl Viro __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 419504da6e9dSAl Viro if (!err) { 419604da6e9dSAl Viro err = nfserrno(vfs_test_lock(file, lock)); 419755ef1274SJ. Bruce Fields nfsd_close(file); 419804da6e9dSAl Viro } 419955ef1274SJ. Bruce Fields return err; 420055ef1274SJ. Bruce Fields } 420155ef1274SJ. Bruce Fields 420255ef1274SJ. Bruce Fields /* 42031da177e4SLinus Torvalds * LOCKT operation 42041da177e4SLinus Torvalds */ 4205b37ad28bSAl Viro __be32 4206ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4207ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42081da177e4SLinus Torvalds { 42091da177e4SLinus Torvalds struct inode *inode; 42101da177e4SLinus Torvalds struct file_lock file_lock; 4211fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4212b37ad28bSAl Viro __be32 status; 42131da177e4SLinus Torvalds 4214*5ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp))) 42151da177e4SLinus Torvalds return nfserr_grace; 42161da177e4SLinus Torvalds 42171da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42181da177e4SLinus Torvalds return nfserr_inval; 42191da177e4SLinus Torvalds 42201da177e4SLinus Torvalds nfs4_lock_state(); 42211da177e4SLinus Torvalds 42221da177e4SLinus Torvalds status = nfserr_stale_clientid; 422360adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 42241da177e4SLinus Torvalds goto out; 42251da177e4SLinus Torvalds 422675c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42271da177e4SLinus Torvalds goto out; 42281da177e4SLinus Torvalds 4229ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 42301da177e4SLinus Torvalds locks_init_lock(&file_lock); 42311da177e4SLinus Torvalds switch (lockt->lt_type) { 42321da177e4SLinus Torvalds case NFS4_READ_LT: 42331da177e4SLinus Torvalds case NFS4_READW_LT: 42341da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 42351da177e4SLinus Torvalds break; 42361da177e4SLinus Torvalds case NFS4_WRITE_LT: 42371da177e4SLinus Torvalds case NFS4_WRITEW_LT: 42381da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 42391da177e4SLinus Torvalds break; 42401da177e4SLinus Torvalds default: 42412fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 42421da177e4SLinus Torvalds status = nfserr_inval; 42431da177e4SLinus Torvalds goto out; 42441da177e4SLinus Torvalds } 42451da177e4SLinus Torvalds 4246fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4247fe0750e5SJ. Bruce Fields if (lo) 4248fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 42491da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42501da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 42511da177e4SLinus Torvalds 42521da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 425387df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 42541da177e4SLinus Torvalds 42551da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42561da177e4SLinus Torvalds 425704da6e9dSAl Viro status = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 425804da6e9dSAl Viro if (status) 4259fd85b817SMarc Eshel goto out; 426004da6e9dSAl Viro 42619d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 42621da177e4SLinus Torvalds status = nfserr_denied; 42639d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 42641da177e4SLinus Torvalds } 42651da177e4SLinus Torvalds out: 42661da177e4SLinus Torvalds nfs4_unlock_state(); 42671da177e4SLinus Torvalds return status; 42681da177e4SLinus Torvalds } 42691da177e4SLinus Torvalds 4270b37ad28bSAl Viro __be32 4271ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4272a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 42731da177e4SLinus Torvalds { 4274dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 42751da177e4SLinus Torvalds struct file *filp = NULL; 42761da177e4SLinus Torvalds struct file_lock file_lock; 4277b37ad28bSAl Viro __be32 status; 4278b8dd7b9aSAl Viro int err; 42791da177e4SLinus Torvalds 42801da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 42811da177e4SLinus Torvalds (long long) locku->lu_offset, 42821da177e4SLinus Torvalds (long long) locku->lu_length); 42831da177e4SLinus Torvalds 42841da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 42851da177e4SLinus Torvalds return nfserr_inval; 42861da177e4SLinus Torvalds 42871da177e4SLinus Torvalds nfs4_lock_state(); 42881da177e4SLinus Torvalds 42899072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 42902288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 42919072d5c6SJ. Bruce Fields if (status) 42921da177e4SLinus Torvalds goto out; 4293f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4294f9d7562fSJ. Bruce Fields if (!filp) { 4295f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4296f9d7562fSJ. Bruce Fields goto out; 4297f9d7562fSJ. Bruce Fields } 42981da177e4SLinus Torvalds BUG_ON(!filp); 42991da177e4SLinus Torvalds locks_init_lock(&file_lock); 43001da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4301fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 43021da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 43031da177e4SLinus Torvalds file_lock.fl_file = filp; 43041da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4305d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 43061da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 43071da177e4SLinus Torvalds 430887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 43091da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 43101da177e4SLinus Torvalds 43111da177e4SLinus Torvalds /* 43121da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43131da177e4SLinus Torvalds */ 4314fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4315b8dd7b9aSAl Viro if (err) { 4316fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43171da177e4SLinus Torvalds goto out_nfserr; 43181da177e4SLinus Torvalds } 43191da177e4SLinus Torvalds /* 43201da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43211da177e4SLinus Torvalds */ 4322dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4323dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43241da177e4SLinus Torvalds 43251da177e4SLinus Torvalds out: 432671c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43271da177e4SLinus Torvalds nfs4_unlock_state(); 43281da177e4SLinus Torvalds return status; 43291da177e4SLinus Torvalds 43301da177e4SLinus Torvalds out_nfserr: 4331b8dd7b9aSAl Viro status = nfserrno(err); 43321da177e4SLinus Torvalds goto out; 43331da177e4SLinus Torvalds } 43341da177e4SLinus Torvalds 43351da177e4SLinus Torvalds /* 43361da177e4SLinus Torvalds * returns 43371da177e4SLinus Torvalds * 1: locks held by lockowner 43381da177e4SLinus Torvalds * 0: no locks held by lockowner 43391da177e4SLinus Torvalds */ 43401da177e4SLinus Torvalds static int 4341fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 43421da177e4SLinus Torvalds { 43431da177e4SLinus Torvalds struct file_lock **flpp; 4344f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 43451da177e4SLinus Torvalds int status = 0; 43461da177e4SLinus Torvalds 4347b89f4321SArnd Bergmann lock_flocks(); 43481da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4349796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 43501da177e4SLinus Torvalds status = 1; 43511da177e4SLinus Torvalds goto out; 43521da177e4SLinus Torvalds } 4353796dadfdSJ. Bruce Fields } 43541da177e4SLinus Torvalds out: 4355b89f4321SArnd Bergmann unlock_flocks(); 43561da177e4SLinus Torvalds return status; 43571da177e4SLinus Torvalds } 43581da177e4SLinus Torvalds 4359b37ad28bSAl Viro __be32 4360b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4361b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4362b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 43631da177e4SLinus Torvalds { 43641da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 43653e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4366fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4367dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43681da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 43693e9e3dbeSNeilBrown struct list_head matches; 437016bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4371b37ad28bSAl Viro __be32 status; 43721da177e4SLinus Torvalds 43731da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 43741da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 43751da177e4SLinus Torvalds 43761da177e4SLinus Torvalds /* XXX check for lease expiration */ 43771da177e4SLinus Torvalds 43781da177e4SLinus Torvalds status = nfserr_stale_clientid; 4379849823c5SNeil Brown if (STALE_CLIENTID(clid)) 43801da177e4SLinus Torvalds return status; 43811da177e4SLinus Torvalds 43821da177e4SLinus Torvalds nfs4_lock_state(); 43831da177e4SLinus Torvalds 43841da177e4SLinus Torvalds status = nfserr_locks_held; 43853e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 438606f1f864SJ. Bruce Fields 438716bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 438816bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 438916bfdaafSJ. Bruce Fields continue; 4390599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 43913e9e3dbeSNeilBrown continue; 43923e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4393ea1da636SNeilBrown st_perstateowner) { 4394fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4395fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 43961da177e4SLinus Torvalds goto out; 4397fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 43981da177e4SLinus Torvalds } 43993e9e3dbeSNeilBrown } 44003e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44013e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44023e9e3dbeSNeilBrown * have been checked. */ 44031da177e4SLinus Torvalds status = nfs_ok; 44040fa822e4SNeilBrown while (!list_empty(&matches)) { 4405fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4406fe0750e5SJ. Bruce Fields lo_list); 44070fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 44080fa822e4SNeilBrown * for openowners. */ 4409fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4410fe0750e5SJ. Bruce Fields release_lockowner(lo); 44111da177e4SLinus Torvalds } 44121da177e4SLinus Torvalds out: 44131da177e4SLinus Torvalds nfs4_unlock_state(); 44141da177e4SLinus Torvalds return status; 44151da177e4SLinus Torvalds } 44161da177e4SLinus Torvalds 44171da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4418a55370a3SNeilBrown alloc_reclaim(void) 44191da177e4SLinus Torvalds { 4420a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44211da177e4SLinus Torvalds } 44221da177e4SLinus Torvalds 4423c7b9a459SNeilBrown int 4424a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4425c7b9a459SNeilBrown { 4426c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4427c7b9a459SNeilBrown struct nfs4_client *clp; 4428c7b9a459SNeilBrown 4429e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4430393d8ed8SJ. Bruce Fields if (!clp) 4431393d8ed8SJ. Bruce Fields return 0; 4432a52d726bSJeff Layton return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); 4433c7b9a459SNeilBrown } 4434c7b9a459SNeilBrown 44351da177e4SLinus Torvalds /* 44361da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 44371da177e4SLinus Torvalds */ 4438190e4fbfSNeilBrown int 4439190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 44401da177e4SLinus Torvalds { 44411da177e4SLinus Torvalds unsigned int strhashval; 44421da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44431da177e4SLinus Torvalds 4444a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4445a55370a3SNeilBrown crp = alloc_reclaim(); 44461da177e4SLinus Torvalds if (!crp) 44471da177e4SLinus Torvalds return 0; 4448a55370a3SNeilBrown strhashval = clientstr_hashval(name); 44491da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 44501da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4451a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 44521da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 44531da177e4SLinus Torvalds return 1; 44541da177e4SLinus Torvalds } 44551da177e4SLinus Torvalds 44562a4317c5SJeff Layton void 44571da177e4SLinus Torvalds nfs4_release_reclaim(void) 44581da177e4SLinus Torvalds { 44591da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44601da177e4SLinus Torvalds int i; 44611da177e4SLinus Torvalds 44621da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44631da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 44641da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 44651da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 44661da177e4SLinus Torvalds list_del(&crp->cr_strhash); 44671da177e4SLinus Torvalds kfree(crp); 44681da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 44691da177e4SLinus Torvalds } 44701da177e4SLinus Torvalds } 44711da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 44721da177e4SLinus Torvalds } 44731da177e4SLinus Torvalds 44741da177e4SLinus Torvalds /* 44751da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 44762a4317c5SJeff Layton struct nfs4_client_reclaim * 4477a52d726bSJeff Layton nfsd4_find_reclaim_client(struct nfs4_client *clp) 44781da177e4SLinus Torvalds { 44791da177e4SLinus Torvalds unsigned int strhashval; 44801da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44811da177e4SLinus Torvalds 4482a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4483a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4484a55370a3SNeilBrown clp->cl_recdir); 44851da177e4SLinus Torvalds 44861da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4487a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 44881da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4489a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 44901da177e4SLinus Torvalds return crp; 44911da177e4SLinus Torvalds } 44921da177e4SLinus Torvalds } 44931da177e4SLinus Torvalds return NULL; 44941da177e4SLinus Torvalds } 44951da177e4SLinus Torvalds 44961da177e4SLinus Torvalds /* 44971da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 44981da177e4SLinus Torvalds */ 4499b37ad28bSAl Viro __be32 45001da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 45011da177e4SLinus Torvalds { 4502a52d726bSJeff Layton struct nfs4_client *clp; 4503a52d726bSJeff Layton 4504a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 4505a52d726bSJeff Layton clp = find_confirmed_client(clid); 4506a52d726bSJeff Layton if (clp == NULL) 4507a52d726bSJeff Layton return nfserr_reclaim_bad; 4508a52d726bSJeff Layton 4509a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45101da177e4SLinus Torvalds } 45111da177e4SLinus Torvalds 451265178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 451365178db4SBryan Schumaker 451465178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 451565178db4SBryan Schumaker { 451665178db4SBryan Schumaker struct nfs4_client *clp, *next; 451765178db4SBryan Schumaker int count = 0; 451865178db4SBryan Schumaker 451965178db4SBryan Schumaker nfs4_lock_state(); 452065178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 45212a4317c5SJeff Layton nfsd4_client_record_remove(clp); 452265178db4SBryan Schumaker expire_client(clp); 452365178db4SBryan Schumaker if (++count == num) 452465178db4SBryan Schumaker break; 452565178db4SBryan Schumaker } 452665178db4SBryan Schumaker nfs4_unlock_state(); 452765178db4SBryan Schumaker 452865178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 452965178db4SBryan Schumaker } 453065178db4SBryan Schumaker 453165178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 453265178db4SBryan Schumaker { 453365178db4SBryan Schumaker release_lockowner(lockowner(sop)); 453465178db4SBryan Schumaker } 453565178db4SBryan Schumaker 453665178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 453765178db4SBryan Schumaker { 453865178db4SBryan Schumaker release_openowner(openowner(sop)); 453965178db4SBryan Schumaker } 454065178db4SBryan Schumaker 4541353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 454265178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 454365178db4SBryan Schumaker { 454465178db4SBryan Schumaker int i, count = 0; 454565178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 454665178db4SBryan Schumaker 454716bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 454816bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 454916bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 455016bfdaafSJ. Bruce Fields continue; 455165178db4SBryan Schumaker release_sop(sop); 455265178db4SBryan Schumaker if (++count == num) 455365178db4SBryan Schumaker return count; 455465178db4SBryan Schumaker } 455565178db4SBryan Schumaker } 455665178db4SBryan Schumaker return count; 455765178db4SBryan Schumaker } 455865178db4SBryan Schumaker 455965178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 456065178db4SBryan Schumaker { 456165178db4SBryan Schumaker int count; 456265178db4SBryan Schumaker 456365178db4SBryan Schumaker nfs4_lock_state(); 456416bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 456565178db4SBryan Schumaker nfs4_unlock_state(); 456665178db4SBryan Schumaker 456765178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 456865178db4SBryan Schumaker } 456965178db4SBryan Schumaker 457065178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 457165178db4SBryan Schumaker { 457265178db4SBryan Schumaker int count; 457365178db4SBryan Schumaker 457465178db4SBryan Schumaker nfs4_lock_state(); 457516bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 457665178db4SBryan Schumaker nfs4_unlock_state(); 457765178db4SBryan Schumaker 457865178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 457965178db4SBryan Schumaker } 458065178db4SBryan Schumaker 4581a6d88f29SStanislav Kinsbursky int nfsd_process_n_delegations(u64 num, struct list_head *list) 458265178db4SBryan Schumaker { 458365178db4SBryan Schumaker int i, count = 0; 45842d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 45852d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 458665178db4SBryan Schumaker 458765178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 45882d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 45892d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 4590a6d88f29SStanislav Kinsbursky list_move(&dp->dl_recall_lru, list); 459165178db4SBryan Schumaker if (++count == num) 459265178db4SBryan Schumaker return count; 459365178db4SBryan Schumaker } 459465178db4SBryan Schumaker } 459565178db4SBryan Schumaker } 45962d3475c0SBryan Schumaker 459765178db4SBryan Schumaker return count; 459865178db4SBryan Schumaker } 459965178db4SBryan Schumaker 460065178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 460165178db4SBryan Schumaker { 460265178db4SBryan Schumaker unsigned int count; 4603a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4604a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 4605a6d88f29SStanislav Kinsbursky 4606a6d88f29SStanislav Kinsbursky spin_lock(&recall_lock); 4607a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4608a6d88f29SStanislav Kinsbursky spin_unlock(&recall_lock); 460965178db4SBryan Schumaker 461065178db4SBryan Schumaker nfs4_lock_state(); 4611a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) 4612a6d88f29SStanislav Kinsbursky unhash_delegation(dp); 461365178db4SBryan Schumaker nfs4_unlock_state(); 461465178db4SBryan Schumaker 461565178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 461665178db4SBryan Schumaker } 461765178db4SBryan Schumaker 461865178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 461965178db4SBryan Schumaker { 462065178db4SBryan Schumaker unsigned int count; 4621a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4622a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 462365178db4SBryan Schumaker 462465178db4SBryan Schumaker spin_lock(&recall_lock); 4625a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4626a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { 4627a6d88f29SStanislav Kinsbursky list_del(&dp->dl_recall_lru); 4628a6d88f29SStanislav Kinsbursky nfsd_break_one_deleg(dp); 4629a6d88f29SStanislav Kinsbursky } 463065178db4SBryan Schumaker spin_unlock(&recall_lock); 463165178db4SBryan Schumaker 463265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 463365178db4SBryan Schumaker } 463465178db4SBryan Schumaker 463565178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 463665178db4SBryan Schumaker 4637ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 46381da177e4SLinus Torvalds 463972083396SBryan Schumaker void 4640ac4d8ff2SNeilBrown nfs4_state_init(void) 46411da177e4SLinus Torvalds { 464272083396SBryan Schumaker int i; 46431da177e4SLinus Torvalds 46441da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46451da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 46461da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 46471da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 46481da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 464902cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 46501da177e4SLinus Torvalds } 46515282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 46525282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 46531da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 46541da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 46551da177e4SLinus Torvalds } 465616bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 465716bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 46581da177e4SLinus Torvalds } 4659009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4660009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 46611da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 46621da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 46631da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4664ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4665ac4d8ff2SNeilBrown } 4666ac4d8ff2SNeilBrown 4667c2f1a551SMeelap Shah /* 4668c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4669c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4670c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4671c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4672c2f1a551SMeelap Shah * 4673c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4674c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4675c2f1a551SMeelap Shah */ 4676c2f1a551SMeelap Shah static void 4677c2f1a551SMeelap Shah set_max_delegations(void) 4678c2f1a551SMeelap Shah { 4679c2f1a551SMeelap Shah /* 4680c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4681c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4682c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4683c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4684c2f1a551SMeelap Shah */ 4685c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4686c2f1a551SMeelap Shah } 4687c2f1a551SMeelap Shah 4688ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4689ac4d8ff2SNeilBrown 4690a6d6b781SJeff Layton int 4691a6d6b781SJeff Layton nfs4_state_start(void) 4692ac4d8ff2SNeilBrown { 46935e1533c7SStanislav Kinsbursky struct net *net = &init_net; 46945e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 4695b5a1a81eSJ. Bruce Fields int ret; 4696b5a1a81eSJ. Bruce Fields 46972a4317c5SJeff Layton /* 46982a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 46992a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 47002a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 47012a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 47022a4317c5SJeff Layton * basis. 47032a4317c5SJeff Layton */ 47045e1533c7SStanislav Kinsbursky get_net(net); 47055e1533c7SStanislav Kinsbursky nfsd4_client_tracking_init(net); 47061da177e4SLinus Torvalds boot_time = get_seconds(); 4707*5ccb0066SStanislav Kinsbursky locks_start_grace(net, &nn->nfsd4_manager); 470833dcc481SJeff Layton grace_ended = false; 47099a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4710e46b498cSJ. Bruce Fields nfsd4_grace); 4711b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4712a6d6b781SJeff Layton if (ret) { 4713a6d6b781SJeff Layton ret = -ENOMEM; 4714a6d6b781SJeff Layton goto out_recovery; 4715a6d6b781SJeff Layton } 471658da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4717a6d6b781SJeff Layton if (laundry_wq == NULL) { 4718a6d6b781SJeff Layton ret = -ENOMEM; 4719a6d6b781SJeff Layton goto out_recovery; 4720a6d6b781SJeff Layton } 4721b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4722b5a1a81eSJ. Bruce Fields if (ret) 4723b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4724e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4725c2f1a551SMeelap Shah set_max_delegations(); 4726b5a1a81eSJ. Bruce Fields return 0; 4727b5a1a81eSJ. Bruce Fields out_free_laundry: 4728b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4729a6d6b781SJeff Layton out_recovery: 47305e1533c7SStanislav Kinsbursky nfsd4_client_tracking_exit(net); 47315e1533c7SStanislav Kinsbursky put_net(net); 4732b5a1a81eSJ. Bruce Fields return ret; 47331da177e4SLinus Torvalds } 47341da177e4SLinus Torvalds 47351da177e4SLinus Torvalds static void 47361da177e4SLinus Torvalds __nfs4_state_shutdown(void) 47371da177e4SLinus Torvalds { 47381da177e4SLinus Torvalds int i; 47391da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 47401da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 47411da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 47421da177e4SLinus Torvalds 47431da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47441da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 47451da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 47461da177e4SLinus Torvalds expire_client(clp); 47471da177e4SLinus Torvalds } 47481da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 47491da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 47501da177e4SLinus Torvalds expire_client(clp); 47511da177e4SLinus Torvalds } 47521da177e4SLinus Torvalds } 47531da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 47541da177e4SLinus Torvalds spin_lock(&recall_lock); 47551da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 47561da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47571da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 47581da177e4SLinus Torvalds } 47591da177e4SLinus Torvalds spin_unlock(&recall_lock); 47601da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 47611da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47621da177e4SLinus Torvalds unhash_delegation(dp); 47631da177e4SLinus Torvalds } 47641da177e4SLinus Torvalds 47652a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47662a4317c5SJeff Layton put_net(&init_net); 47671da177e4SLinus Torvalds } 47681da177e4SLinus Torvalds 47691da177e4SLinus Torvalds void 47701da177e4SLinus Torvalds nfs4_state_shutdown(void) 47711da177e4SLinus Torvalds { 47725e1533c7SStanislav Kinsbursky struct net *net = &init_net; 47735e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 47745e1533c7SStanislav Kinsbursky 4775afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 47765e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 47775e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 47781da177e4SLinus Torvalds nfs4_lock_state(); 47791da177e4SLinus Torvalds __nfs4_state_shutdown(); 47801da177e4SLinus Torvalds nfs4_unlock_state(); 4781c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 47821da177e4SLinus Torvalds } 47838b70484cSTigran Mkrtchyan 47848b70484cSTigran Mkrtchyan static void 47858b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47868b70484cSTigran Mkrtchyan { 478737c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 478837c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 47898b70484cSTigran Mkrtchyan } 47908b70484cSTigran Mkrtchyan 47918b70484cSTigran Mkrtchyan static void 47928b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47938b70484cSTigran Mkrtchyan { 479437c593c5STigran Mkrtchyan if (cstate->minorversion) { 479537c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 479637c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 479737c593c5STigran Mkrtchyan } 479837c593c5STigran Mkrtchyan } 479937c593c5STigran Mkrtchyan 480037c593c5STigran Mkrtchyan void 480137c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 480237c593c5STigran Mkrtchyan { 480337c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 48048b70484cSTigran Mkrtchyan } 48058b70484cSTigran Mkrtchyan 480662cd4a59STigran Mkrtchyan /* 480762cd4a59STigran Mkrtchyan * functions to set current state id 480862cd4a59STigran Mkrtchyan */ 48098b70484cSTigran Mkrtchyan void 48109428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48119428fe1aSTigran Mkrtchyan { 48129428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 48139428fe1aSTigran Mkrtchyan } 48149428fe1aSTigran Mkrtchyan 48159428fe1aSTigran Mkrtchyan void 48168b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 48178b70484cSTigran Mkrtchyan { 48188b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 48198b70484cSTigran Mkrtchyan } 48208b70484cSTigran Mkrtchyan 48218b70484cSTigran Mkrtchyan void 482262cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 482362cd4a59STigran Mkrtchyan { 482462cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 482562cd4a59STigran Mkrtchyan } 482662cd4a59STigran Mkrtchyan 482762cd4a59STigran Mkrtchyan void 482862cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 482962cd4a59STigran Mkrtchyan { 483062cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 483162cd4a59STigran Mkrtchyan } 483262cd4a59STigran Mkrtchyan 483362cd4a59STigran Mkrtchyan /* 483462cd4a59STigran Mkrtchyan * functions to consume current state id 483562cd4a59STigran Mkrtchyan */ 48361e97b519STigran Mkrtchyan 48371e97b519STigran Mkrtchyan void 48389428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48399428fe1aSTigran Mkrtchyan { 48409428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 48419428fe1aSTigran Mkrtchyan } 48429428fe1aSTigran Mkrtchyan 48439428fe1aSTigran Mkrtchyan void 48449428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 48459428fe1aSTigran Mkrtchyan { 48469428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 48479428fe1aSTigran Mkrtchyan } 48489428fe1aSTigran Mkrtchyan 48499428fe1aSTigran Mkrtchyan void 48501e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 48511e97b519STigran Mkrtchyan { 48521e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 48531e97b519STigran Mkrtchyan } 48541e97b519STigran Mkrtchyan 48551e97b519STigran Mkrtchyan void 48561e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 48571e97b519STigran Mkrtchyan { 48581e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 48591e97b519STigran Mkrtchyan } 48601e97b519STigran Mkrtchyan 486162cd4a59STigran Mkrtchyan void 48628b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 48638b70484cSTigran Mkrtchyan { 48648b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 48658b70484cSTigran Mkrtchyan } 48668b70484cSTigran Mkrtchyan 48678b70484cSTigran Mkrtchyan void 486862cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 48698b70484cSTigran Mkrtchyan { 487062cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 48718b70484cSTigran Mkrtchyan } 487230813e27STigran Mkrtchyan 487330813e27STigran Mkrtchyan void 487430813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 487530813e27STigran Mkrtchyan { 487630813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 487730813e27STigran Mkrtchyan } 487830813e27STigran Mkrtchyan 487930813e27STigran Mkrtchyan void 488030813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 488130813e27STigran Mkrtchyan { 488230813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 488330813e27STigran Mkrtchyan } 4884