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> 4168e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 42363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 439a74af21SBoaz Harrosh #include "xdr4.h" 440a3adadeSJ. Bruce Fields #include "vfs.h" 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds /* Globals */ 49cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 50efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 51fd39ca9aSNeilBrown static time_t boot_time; 52fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 53fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 54ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 55fd39ca9aSNeilBrown 56fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 57fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds /* forward declarations */ 60fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 611da177e4SLinus Torvalds 628b671b80SJ. Bruce Fields /* Locking: */ 638b671b80SJ. Bruce Fields 648b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 65353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 661da177e4SLinus Torvalds 678b671b80SJ. Bruce Fields /* 688b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 698b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 708b671b80SJ. Bruce Fields * eventually cover more: 718b671b80SJ. Bruce Fields */ 728b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 738b671b80SJ. Bruce Fields 74fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 75fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 76e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 77e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 78e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 79e60d4398SNeilBrown 801da177e4SLinus Torvalds void 811da177e4SLinus Torvalds nfs4_lock_state(void) 821da177e4SLinus Torvalds { 83353ab6e9SIngo Molnar mutex_lock(&client_mutex); 841da177e4SLinus Torvalds } 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds void 871da177e4SLinus Torvalds nfs4_unlock_state(void) 881da177e4SLinus Torvalds { 89353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 901da177e4SLinus Torvalds } 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds static inline u32 931da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 941da177e4SLinus Torvalds { 951da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds u32 x = 0; 981da177e4SLinus Torvalds while (nbytes--) { 991da177e4SLinus Torvalds x *= 37; 1001da177e4SLinus Torvalds x += *cptr++; 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds return x; 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds static struct list_head del_recall_lru; 1061da177e4SLinus Torvalds 10732513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 10832513b40SJ. Bruce Fields { 10932513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 11032513b40SJ. Bruce Fields } 11132513b40SJ. Bruce Fields 11213cd2184SNeilBrown static inline void 11313cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 11413cd2184SNeilBrown { 1158b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1168b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1178b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1188b671b80SJ. Bruce Fields iput(fi->fi_inode); 11932513b40SJ. Bruce Fields nfsd4_free_file(fi); 1208b671b80SJ. Bruce Fields } 12113cd2184SNeilBrown } 12213cd2184SNeilBrown 12313cd2184SNeilBrown static inline void 12413cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 12513cd2184SNeilBrown { 1268b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 12713cd2184SNeilBrown } 12813cd2184SNeilBrown 129ef0f3390SNeilBrown static int num_delegations; 130c2f1a551SMeelap Shah unsigned int max_delegations; 131ef0f3390SNeilBrown 132ef0f3390SNeilBrown /* 133ef0f3390SNeilBrown * Open owner state (share locks) 134ef0f3390SNeilBrown */ 135ef0f3390SNeilBrown 13616bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 13716bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 13816bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 13916bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 140ef0f3390SNeilBrown 14116bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 142ddc04c41SJ. Bruce Fields { 143ddc04c41SJ. Bruce Fields unsigned int ret; 144ddc04c41SJ. Bruce Fields 145ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 146ddc04c41SJ. Bruce Fields ret += clientid; 14716bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 148ddc04c41SJ. Bruce Fields } 149ef0f3390SNeilBrown 15016bfdaafSJ. Bruce Fields static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 151ef0f3390SNeilBrown 152ef0f3390SNeilBrown /* hash table for nfs4_file */ 153ef0f3390SNeilBrown #define FILE_HASH_BITS 8 154ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 15535079582SShan Wei 156ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 157ddc04c41SJ. Bruce Fields { 158ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 159ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 160ddc04c41SJ. Bruce Fields } 161ddc04c41SJ. Bruce Fields 162ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 163ef0f3390SNeilBrown 164998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 165f9d7562fSJ. Bruce Fields { 166f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 167f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 168f9d7562fSJ. Bruce Fields } 169f9d7562fSJ. Bruce Fields 170998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 171998db52cSJ. Bruce Fields { 172998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 173998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 174998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 175998db52cSJ. Bruce Fields } else 176998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 177998db52cSJ. Bruce Fields } 178998db52cSJ. Bruce Fields 179998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 180f9d7562fSJ. Bruce Fields { 181f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 182f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 183f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 184f9d7562fSJ. Bruce Fields } 185f9d7562fSJ. Bruce Fields } 186f9d7562fSJ. Bruce Fields 187998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 188f9d7562fSJ. Bruce Fields { 189f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 190f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 1913d02fa29SJ. Bruce Fields /* 1923d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 1933d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 1943d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 1953d02fa29SJ. Bruce Fields */ 1963d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 1973d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 1983d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 199f9d7562fSJ. Bruce Fields } 200f9d7562fSJ. Bruce Fields } 201f9d7562fSJ. Bruce Fields 202998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 203998db52cSJ. Bruce Fields { 204998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 205998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 206998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 207998db52cSJ. Bruce Fields } else 208998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 209998db52cSJ. Bruce Fields } 210998db52cSJ. Bruce Fields 2116136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 21236d44c60SJ. Bruce Fields { 2136136d2b4SJ. Bruce Fields static int min_stateid = 0; 21438c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2156136d2b4SJ. Bruce Fields int new_stid; 2166136d2b4SJ. Bruce Fields int error; 21736d44c60SJ. Bruce Fields 21838c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2196136d2b4SJ. Bruce Fields /* 220996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 221996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 222996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 223996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2246136d2b4SJ. Bruce Fields */ 2256136d2b4SJ. Bruce Fields BUG_ON(error); 2266136d2b4SJ. Bruce Fields /* 2276136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2286136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2296136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2306136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2316136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2326136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2336136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2346136d2b4SJ. Bruce Fields */ 2356136d2b4SJ. Bruce Fields 2366136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2376136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2386136d2b4SJ. Bruce Fields min_stateid = 0; 2396136d2b4SJ. Bruce Fields return new_stid; 24036d44c60SJ. Bruce Fields } 24136d44c60SJ. Bruce Fields 242996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2432a74aba7SJ. Bruce Fields { 2442a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2456136d2b4SJ. Bruce Fields int new_id; 2462a74aba7SJ. Bruce Fields 2472a74aba7SJ. Bruce Fields stid->sc_type = type; 2482a74aba7SJ. Bruce Fields stid->sc_client = cl; 2492a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2506136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2516136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2522a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2532a74aba7SJ. Bruce Fields s->si_generation = 0; 254996e0938SJ. Bruce Fields } 255996e0938SJ. Bruce Fields 256996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 257996e0938SJ. Bruce Fields { 258996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 259996e0938SJ. Bruce Fields 260996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 261996e0938SJ. Bruce Fields return NULL; 262996e0938SJ. Bruce Fields /* 263996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 264996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 265996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 266996e0938SJ. Bruce Fields * preallocated entries. 267996e0938SJ. Bruce Fields */ 268996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2692a74aba7SJ. Bruce Fields } 2702a74aba7SJ. Bruce Fields 2714cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 2724cdc951bSJ. Bruce Fields { 2734cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 2744cdc951bSJ. Bruce Fields } 2754cdc951bSJ. Bruce Fields 2761da177e4SLinus Torvalds static struct nfs4_delegation * 277dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 2781da177e4SLinus Torvalds { 2791da177e4SLinus Torvalds struct nfs4_delegation *dp; 2801da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 283c3e48080SJ. Bruce Fields /* 284c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 285c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 286c3e48080SJ. Bruce Fields * write delegations properly. 287c3e48080SJ. Bruce Fields */ 288c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 289c3e48080SJ. Bruce Fields return NULL; 29047f9940cSMeelap Shah if (fp->fi_had_conflict) 29147f9940cSMeelap Shah return NULL; 292c2f1a551SMeelap Shah if (num_delegations > max_delegations) 293ef0f3390SNeilBrown return NULL; 294996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 2955b2d21c1SNeilBrown if (dp == NULL) 2961da177e4SLinus Torvalds return dp; 297996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 2982a74aba7SJ. Bruce Fields /* 2992a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3006136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3016136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3022a74aba7SJ. Bruce Fields */ 3032a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 304ef0f3390SNeilBrown num_delegations++; 305ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 306ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3071da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 30813cd2184SNeilBrown get_nfs4_file(fp); 3091da177e4SLinus Torvalds dp->dl_file = fp; 3101da177e4SLinus Torvalds dp->dl_type = type; 3116c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3121da177e4SLinus Torvalds dp->dl_time = 0; 3131da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 314b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 3151da177e4SLinus Torvalds return dp; 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds void 3191da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3201da177e4SLinus Torvalds { 3211da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3221da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 32313cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3245b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 325ef0f3390SNeilBrown num_delegations--; 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds } 3281da177e4SLinus Torvalds 329acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3301da177e4SLinus Torvalds { 331acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 332acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 333acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3344ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 335acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 336acfdf5c3SJ. Bruce Fields } 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds 3396136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3406136d2b4SJ. Bruce Fields { 34138c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 34238c2f4b1SJ. Bruce Fields 34338c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3446136d2b4SJ. Bruce Fields } 3456136d2b4SJ. Bruce Fields 3461da177e4SLinus Torvalds /* Called under the state lock. */ 3471da177e4SLinus Torvalds static void 3481da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3491da177e4SLinus Torvalds { 3506136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 351ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3521da177e4SLinus Torvalds spin_lock(&recall_lock); 3535d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3541da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3551da177e4SLinus Torvalds spin_unlock(&recall_lock); 356acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3571da177e4SLinus Torvalds nfs4_put_delegation(dp); 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds /* 3611da177e4SLinus Torvalds * SETCLIENTID state 3621da177e4SLinus Torvalds */ 3631da177e4SLinus Torvalds 36436acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3659089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3669089f1b4SBenny Halevy 3671da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3681da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3691da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3701da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 3711da177e4SLinus Torvalds 372ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 373ddc04c41SJ. Bruce Fields { 374ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 375ddc04c41SJ. Bruce Fields } 376ddc04c41SJ. Bruce Fields 377ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 378ddc04c41SJ. Bruce Fields { 379ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 380ddc04c41SJ. Bruce Fields } 381ddc04c41SJ. Bruce Fields 3821da177e4SLinus Torvalds /* 3831da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 3841da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 3851da177e4SLinus Torvalds * 3861da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 3871da177e4SLinus Torvalds * setclientid_confirmed info. 3881da177e4SLinus Torvalds * 3891da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 3901da177e4SLinus Torvalds * setclientid info. 3911da177e4SLinus Torvalds * 3921da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 3931da177e4SLinus Torvalds * for lease renewal. 3941da177e4SLinus Torvalds * 3951da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 3961da177e4SLinus Torvalds * for last close replay. 3971da177e4SLinus Torvalds */ 3981da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 3991da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 4001da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 4011da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 4021da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 4031da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 4041da177e4SLinus Torvalds static struct list_head client_lru; 4051da177e4SLinus Torvalds static struct list_head close_lru; 4061da177e4SLinus Torvalds 407f9d7562fSJ. Bruce Fields /* 408f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 409f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 410f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 411f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 412f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 413f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 414f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 415f9d7562fSJ. Bruce Fields * 416f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 417f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 418f9d7562fSJ. Bruce Fields * 419f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 420f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 421f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 422f9d7562fSJ. Bruce Fields * 423f9d7562fSJ. Bruce Fields * which we should reject. 424f9d7562fSJ. Bruce Fields */ 425f9d7562fSJ. Bruce Fields static void 426f9d7562fSJ. Bruce Fields set_access(unsigned int *access, unsigned long bmap) { 427f9d7562fSJ. Bruce Fields int i; 428f9d7562fSJ. Bruce Fields 429f9d7562fSJ. Bruce Fields *access = 0; 430f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 431f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 432f9d7562fSJ. Bruce Fields *access |= i; 433f9d7562fSJ. Bruce Fields } 434f9d7562fSJ. Bruce Fields } 435f9d7562fSJ. Bruce Fields 436f9d7562fSJ. Bruce Fields static void 437f9d7562fSJ. Bruce Fields set_deny(unsigned int *deny, unsigned long bmap) { 438f9d7562fSJ. Bruce Fields int i; 439f9d7562fSJ. Bruce Fields 440f9d7562fSJ. Bruce Fields *deny = 0; 441f9d7562fSJ. Bruce Fields for (i = 0; i < 4; i++) { 442f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 443f9d7562fSJ. Bruce Fields *deny |= i ; 444f9d7562fSJ. Bruce Fields } 445f9d7562fSJ. Bruce Fields } 446f9d7562fSJ. Bruce Fields 447f9d7562fSJ. Bruce Fields static int 448dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 449f9d7562fSJ. Bruce Fields unsigned int access, deny; 450f9d7562fSJ. Bruce Fields 451f9d7562fSJ. Bruce Fields set_access(&access, stp->st_access_bmap); 452f9d7562fSJ. Bruce Fields set_deny(&deny, stp->st_deny_bmap); 453f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 454f9d7562fSJ. Bruce Fields return 0; 455f9d7562fSJ. Bruce Fields return 1; 456f9d7562fSJ. Bruce Fields } 457f9d7562fSJ. Bruce Fields 458f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 459f9d7562fSJ. Bruce Fields { 4608f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 461f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 462f9d7562fSJ. Bruce Fields return O_RDONLY; 463f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 464f9d7562fSJ. Bruce Fields return O_WRONLY; 465f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 466f9d7562fSJ. Bruce Fields return O_RDWR; 467f9d7562fSJ. Bruce Fields } 468f9d7562fSJ. Bruce Fields BUG(); 469f9d7562fSJ. Bruce Fields } 470f9d7562fSJ. Bruce Fields 471dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 472529d7b2aSJ. Bruce Fields { 473529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 474529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 475529d7b2aSJ. Bruce Fields } 476529d7b2aSJ. Bruce Fields 477dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 478529d7b2aSJ. Bruce Fields { 479499f3edcSJ. Bruce Fields int i; 4800997b173SJ. Bruce Fields 48123fcf2ecSJ. Bruce Fields if (stp->st_access_bmap) { 482499f3edcSJ. Bruce Fields for (i = 1; i < 4; i++) { 483499f3edcSJ. Bruce Fields if (test_bit(i, &stp->st_access_bmap)) 484499f3edcSJ. Bruce Fields nfs4_file_put_access(stp->st_file, 485499f3edcSJ. Bruce Fields nfs4_access_to_omode(i)); 4864665e2baSJ. Bruce Fields __clear_bit(i, &stp->st_access_bmap); 487499f3edcSJ. Bruce Fields } 48823fcf2ecSJ. Bruce Fields } 489a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 4904665e2baSJ. Bruce Fields stp->st_file = NULL; 4914665e2baSJ. Bruce Fields } 4924665e2baSJ. Bruce Fields 493dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 4944665e2baSJ. Bruce Fields { 495529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 496529d7b2aSJ. Bruce Fields } 497529d7b2aSJ. Bruce Fields 498dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 499529d7b2aSJ. Bruce Fields { 500529d7b2aSJ. Bruce Fields struct file *file; 501529d7b2aSJ. Bruce Fields 502529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5036136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 504529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 505529d7b2aSJ. Bruce Fields if (file) 506fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 50738c387b5SJ. Bruce Fields close_generic_stateid(stp); 508529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 509529d7b2aSJ. Bruce Fields } 510529d7b2aSJ. Bruce Fields 511fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 512529d7b2aSJ. Bruce Fields { 513dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 514529d7b2aSJ. Bruce Fields 515fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 516fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 517fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 518fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 519dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 520529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 521529d7b2aSJ. Bruce Fields } 522529d7b2aSJ. Bruce Fields } 523529d7b2aSJ. Bruce Fields 524fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 525529d7b2aSJ. Bruce Fields { 526fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 527fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 528529d7b2aSJ. Bruce Fields } 529529d7b2aSJ. Bruce Fields 530529d7b2aSJ. Bruce Fields static void 531dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 532529d7b2aSJ. Bruce Fields { 533fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 534529d7b2aSJ. Bruce Fields 535529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 536fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 537fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 538fe0750e5SJ. Bruce Fields release_lockowner(lo); 539529d7b2aSJ. Bruce Fields } 540529d7b2aSJ. Bruce Fields } 541529d7b2aSJ. Bruce Fields 54238c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 5432283963fSJ. Bruce Fields { 5442283963fSJ. Bruce Fields unhash_generic_stateid(stp); 5452283963fSJ. Bruce Fields release_stateid_lockowners(stp); 54638c387b5SJ. Bruce Fields close_generic_stateid(stp); 54738c387b5SJ. Bruce Fields } 54838c387b5SJ. Bruce Fields 54938c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 55038c387b5SJ. Bruce Fields { 55138c387b5SJ. Bruce Fields unhash_open_stateid(stp); 5526136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 5532283963fSJ. Bruce Fields free_generic_stateid(stp); 5542283963fSJ. Bruce Fields } 5552283963fSJ. Bruce Fields 556fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 557f1d110caSJ. Bruce Fields { 558dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 559f1d110caSJ. Bruce Fields 560fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 561fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 562fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 563fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 564dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 565f1d110caSJ. Bruce Fields release_open_stateid(stp); 566f1d110caSJ. Bruce Fields } 567f1d110caSJ. Bruce Fields } 568f1d110caSJ. Bruce Fields 569f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 570f7a4d872SJ. Bruce Fields { 571f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 572f7a4d872SJ. Bruce Fields 573f7a4d872SJ. Bruce Fields if (s) { 5746136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 575f7a4d872SJ. Bruce Fields free_generic_stateid(s); 576f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 577f7a4d872SJ. Bruce Fields } 578f7a4d872SJ. Bruce Fields } 579f7a4d872SJ. Bruce Fields 580fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 581f1d110caSJ. Bruce Fields { 582fe0750e5SJ. Bruce Fields unhash_openowner(oo); 583fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 584f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 585fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 586f1d110caSJ. Bruce Fields } 587f1d110caSJ. Bruce Fields 5885282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 5895282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 5905282fd72SMarc Eshel 5915282fd72SMarc Eshel static inline int 5925282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 5935282fd72SMarc Eshel { 5945282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 5955282fd72SMarc Eshel 5965282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 5975282fd72SMarc Eshel } 5985282fd72SMarc Eshel 5995282fd72SMarc Eshel static inline void 6005282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6015282fd72SMarc Eshel { 6025282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6035282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6045282fd72SMarc Eshel } 6055282fd72SMarc Eshel 606ec6b5d7bSAndy Adamson static void 607ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 608ec6b5d7bSAndy Adamson { 609ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 610ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 611ec6b5d7bSAndy Adamson 612ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 613ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 614ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 615ec6b5d7bSAndy Adamson sid->reserved = 0; 616ec6b5d7bSAndy Adamson } 617ec6b5d7bSAndy Adamson 618ec6b5d7bSAndy Adamson /* 619a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 620a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 621a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 622a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 623a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 624a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 625a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 626a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 627a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 628a649637cSAndy Adamson * for the SEQUENCE op response: 629ec6b5d7bSAndy Adamson */ 630a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 631a649637cSAndy Adamson 632557ce264SAndy Adamson static void 633557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 634557ce264SAndy Adamson { 635557ce264SAndy Adamson int i; 636557ce264SAndy Adamson 637557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 638557ce264SAndy Adamson kfree(ses->se_slots[i]); 639557ce264SAndy Adamson } 640557ce264SAndy Adamson 641efe0cb6dSJ. Bruce Fields /* 642efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 643efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 644efe0cb6dSJ. Bruce Fields */ 645efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 646efe0cb6dSJ. Bruce Fields { 647efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 648efe0cb6dSJ. Bruce Fields } 649efe0cb6dSJ. Bruce Fields 6505b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 651ec6b5d7bSAndy Adamson { 6525b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 6535b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 654ec6b5d7bSAndy Adamson 6555b6feee9SJ. Bruce Fields return size; 656557ce264SAndy Adamson } 657557ce264SAndy Adamson 6585b6feee9SJ. Bruce Fields /* 6595b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 6605b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 6615b6feee9SJ. Bruce Fields * rooom for new connections. For now we just fail the create session. 6625b6feee9SJ. Bruce Fields */ 6635b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 6645b6feee9SJ. Bruce Fields { 6655b6feee9SJ. Bruce Fields int avail; 6665b6feee9SJ. Bruce Fields 6675b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 6685b6feee9SJ. Bruce Fields 6695b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 6705b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 6715b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 6725b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 6735b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 6745b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 6755b6feee9SJ. Bruce Fields 6765b6feee9SJ. Bruce Fields return num; 6775b6feee9SJ. Bruce Fields } 6785b6feee9SJ. Bruce Fields 6795b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 6805b6feee9SJ. Bruce Fields { 6815b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 6825b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 6835b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 6845b6feee9SJ. Bruce Fields } 6855b6feee9SJ. Bruce Fields 6865b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 6875b6feee9SJ. Bruce Fields { 6885b6feee9SJ. Bruce Fields struct nfsd4_session *new; 6895b6feee9SJ. Bruce Fields int mem, i; 690ec6b5d7bSAndy Adamson 691c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 692ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 6935b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 694ec6b5d7bSAndy Adamson 6955b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 6966c18ba9fSAlexandros Batsakis if (!new) 6975b6feee9SJ. Bruce Fields return NULL; 698ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 6995b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7005b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7015b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7025b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 703ec6b5d7bSAndy Adamson goto out_free; 704ec6b5d7bSAndy Adamson } 7055b6feee9SJ. Bruce Fields return new; 7065b6feee9SJ. Bruce Fields out_free: 7075b6feee9SJ. Bruce Fields while (i--) 7085b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7095b6feee9SJ. Bruce Fields kfree(new); 7105b6feee9SJ. Bruce Fields return NULL; 7115b6feee9SJ. Bruce Fields } 7125b6feee9SJ. Bruce Fields 7135b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7145b6feee9SJ. Bruce Fields { 7155b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7165b6feee9SJ. Bruce Fields 7175b6feee9SJ. Bruce Fields new->maxreqs = numslots; 718d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 719d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7205b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7215b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7225b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7235b6feee9SJ. Bruce Fields } 7245b6feee9SJ. Bruce Fields 72519cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 72619cf5c02SJ. Bruce Fields { 72719cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 72819cf5c02SJ. Bruce Fields kfree(c); 72919cf5c02SJ. Bruce Fields } 73019cf5c02SJ. Bruce Fields 73119cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 73219cf5c02SJ. Bruce Fields { 73319cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 73419cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 73519cf5c02SJ. Bruce Fields 73619cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 73719cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 73819cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 73919cf5c02SJ. Bruce Fields free_conn(c); 74019cf5c02SJ. Bruce Fields } 74119cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 742eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 74319cf5c02SJ. Bruce Fields } 74419cf5c02SJ. Bruce Fields 745d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 746c7662518SJ. Bruce Fields { 747c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 748c7662518SJ. Bruce Fields 749c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 750c7662518SJ. Bruce Fields if (!conn) 751db90681dSJ. Bruce Fields return NULL; 752c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 753c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 754d29c374cSJ. Bruce Fields conn->cn_flags = flags; 755db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 756db90681dSJ. Bruce Fields return conn; 757db90681dSJ. Bruce Fields } 758db90681dSJ. Bruce Fields 759328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 760328ead28SJ. Bruce Fields { 761328ead28SJ. Bruce Fields conn->cn_session = ses; 762328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 763328ead28SJ. Bruce Fields } 764328ead28SJ. Bruce Fields 765db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 766db90681dSJ. Bruce Fields { 767db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 768c7662518SJ. Bruce Fields 769c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 770328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 771c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 772db90681dSJ. Bruce Fields } 773c7662518SJ. Bruce Fields 77421b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 775db90681dSJ. Bruce Fields { 77619cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 77721b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 778db90681dSJ. Bruce Fields } 779db90681dSJ. Bruce Fields 7801d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 781db90681dSJ. Bruce Fields { 782db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 78321b75b01SJ. Bruce Fields int ret; 784db90681dSJ. Bruce Fields 7851d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 786db90681dSJ. Bruce Fields if (!conn) 787db90681dSJ. Bruce Fields return nfserr_jukebox; 788db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 78921b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 79021b75b01SJ. Bruce Fields if (ret) 79121b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 79221b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 793c7662518SJ. Bruce Fields return nfs_ok; 794c7662518SJ. Bruce Fields } 795c7662518SJ. Bruce Fields 7961d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 7971d1bc8f2SJ. Bruce Fields { 7981d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 7991d1bc8f2SJ. Bruce Fields 8001d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 8011d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 8021d1bc8f2SJ. Bruce Fields 8031d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 8041d1bc8f2SJ. Bruce Fields } 8051d1bc8f2SJ. Bruce Fields 8061d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 80719cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 808c7662518SJ. Bruce Fields { 80919cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 81019cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 81119cf5c02SJ. Bruce Fields 81219cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 81319cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 81419cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 81519cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 81619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 81719cf5c02SJ. Bruce Fields 81819cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 81919cf5c02SJ. Bruce Fields free_conn(c); 82019cf5c02SJ. Bruce Fields 82119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 82219cf5c02SJ. Bruce Fields } 82319cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 824c7662518SJ. Bruce Fields } 825c7662518SJ. Bruce Fields 826c7662518SJ. Bruce Fields void free_session(struct kref *kref) 827c7662518SJ. Bruce Fields { 828c7662518SJ. Bruce Fields struct nfsd4_session *ses; 829c7662518SJ. Bruce Fields int mem; 830c7662518SJ. Bruce Fields 831c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 83219cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 833c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 834c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 835c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 836c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 837c7662518SJ. Bruce Fields free_session_slots(ses); 838c7662518SJ. Bruce Fields kfree(ses); 839c7662518SJ. Bruce Fields } 840c7662518SJ. Bruce Fields 841ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 8425b6feee9SJ. Bruce Fields { 8435b6feee9SJ. Bruce Fields struct nfsd4_session *new; 8445b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 8455b6feee9SJ. Bruce Fields int numslots, slotsize; 846c7662518SJ. Bruce Fields int status; 8475b6feee9SJ. Bruce Fields int idx; 8485b6feee9SJ. Bruce Fields 8495b6feee9SJ. Bruce Fields /* 8505b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 8515b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 8525b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 8535b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 8545b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 8555b6feee9SJ. Bruce Fields */ 8565b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 8575b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 858ced6dfe9SMi Jinlong if (numslots < 1) 859ced6dfe9SMi Jinlong return NULL; 8605b6feee9SJ. Bruce Fields 8615b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 8625b6feee9SJ. Bruce Fields if (!new) { 8635b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 864ac7c46f2SJ. Bruce Fields return NULL; 8655b6feee9SJ. Bruce Fields } 8665b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 867ec6b5d7bSAndy Adamson 868ec6b5d7bSAndy Adamson new->se_client = clp; 869ec6b5d7bSAndy Adamson gen_sessionid(new); 870ec6b5d7bSAndy Adamson 871c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 872c7662518SJ. Bruce Fields 873ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 874ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 8758b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 876ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 8775b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 8789089f1b4SBenny Halevy spin_lock(&client_lock); 879ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 8804c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 881ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 8824c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 8839089f1b4SBenny Halevy spin_unlock(&client_lock); 884ec6b5d7bSAndy Adamson 8851d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 886ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 887c7662518SJ. Bruce Fields if (status) { 888c7662518SJ. Bruce Fields free_session(&new->se_ref); 889ac7c46f2SJ. Bruce Fields return NULL; 890c7662518SJ. Bruce Fields } 891dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 892edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 893dcbeaa68SJ. Bruce Fields /* 894dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 895dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 896dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 897dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 898dcbeaa68SJ. Bruce Fields * future: 899dcbeaa68SJ. Bruce Fields */ 900edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 901edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 902edd76786SJ. Bruce Fields } 903dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 904ac7c46f2SJ. Bruce Fields return new; 905ec6b5d7bSAndy Adamson } 906ec6b5d7bSAndy Adamson 9079089f1b4SBenny Halevy /* caller must hold client_lock */ 9085282fd72SMarc Eshel static struct nfsd4_session * 9095282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9105282fd72SMarc Eshel { 9115282fd72SMarc Eshel struct nfsd4_session *elem; 9125282fd72SMarc Eshel int idx; 9135282fd72SMarc Eshel 9145282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9155282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9165282fd72SMarc Eshel /* Search in the appropriate list */ 9175282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 9185282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 9195282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 9205282fd72SMarc Eshel return elem; 9215282fd72SMarc Eshel } 9225282fd72SMarc Eshel } 9235282fd72SMarc Eshel 9245282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 9255282fd72SMarc Eshel return NULL; 9265282fd72SMarc Eshel } 9275282fd72SMarc Eshel 9289089f1b4SBenny Halevy /* caller must hold client_lock */ 9297116ed6bSAndy Adamson static void 9305282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 9317116ed6bSAndy Adamson { 9327116ed6bSAndy Adamson list_del(&ses->se_hash); 9334c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 9347116ed6bSAndy Adamson list_del(&ses->se_perclnt); 9354c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 9365282fd72SMarc Eshel } 9375282fd72SMarc Eshel 93836acb66bSBenny Halevy /* must be called under the client_lock */ 9391da177e4SLinus Torvalds static inline void 94036acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 9411da177e4SLinus Torvalds { 94207cd4909SBenny Halevy if (is_client_expired(clp)) { 94307cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 94407cd4909SBenny Halevy __func__, 94507cd4909SBenny Halevy clp->cl_clientid.cl_boot, 94607cd4909SBenny Halevy clp->cl_clientid.cl_id); 94707cd4909SBenny Halevy return; 94807cd4909SBenny Halevy } 94907cd4909SBenny Halevy 9501da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 9511da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 9521da177e4SLinus Torvalds clp->cl_clientid.cl_id); 9531da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 9541da177e4SLinus Torvalds clp->cl_time = get_seconds(); 9551da177e4SLinus Torvalds } 9561da177e4SLinus Torvalds 95736acb66bSBenny Halevy static inline void 95836acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 95936acb66bSBenny Halevy { 96036acb66bSBenny Halevy spin_lock(&client_lock); 96136acb66bSBenny Halevy renew_client_locked(clp); 96236acb66bSBenny Halevy spin_unlock(&client_lock); 96336acb66bSBenny Halevy } 96436acb66bSBenny Halevy 9651da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 9661da177e4SLinus Torvalds static int 9671da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 9681da177e4SLinus Torvalds { 9691da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 9701da177e4SLinus Torvalds return 0; 97160adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 97260adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 9731da177e4SLinus Torvalds return 1; 9741da177e4SLinus Torvalds } 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds /* 9771da177e4SLinus Torvalds * XXX Should we use a slab cache ? 9781da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 9791da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 9801da177e4SLinus Torvalds */ 98135bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 9821da177e4SLinus Torvalds { 9831da177e4SLinus Torvalds struct nfs4_client *clp; 9841da177e4SLinus Torvalds 98535bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 98635bba9a3SJ. Bruce Fields if (clp == NULL) 98735bba9a3SJ. Bruce Fields return NULL; 98835bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 98935bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 99035bba9a3SJ. Bruce Fields kfree(clp); 99135bba9a3SJ. Bruce Fields return NULL; 99235bba9a3SJ. Bruce Fields } 9931da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 9941da177e4SLinus Torvalds clp->cl_name.len = name.len; 9951da177e4SLinus Torvalds return clp; 9961da177e4SLinus Torvalds } 9971da177e4SLinus Torvalds 9981da177e4SLinus Torvalds static inline void 9991da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10001da177e4SLinus Torvalds { 1001792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1002792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1003792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1004792c95ddSJ. Bruce Fields se_perclnt); 1005792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1006792c95ddSJ. Bruce Fields nfsd4_put_session(ses); 1007792c95ddSJ. Bruce Fields } 10081da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 10091da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 101068e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 10111da177e4SLinus Torvalds kfree(clp->cl_name.data); 10121da177e4SLinus Torvalds kfree(clp); 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds 1015d7682988SBenny Halevy void 1016d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1017d7682988SBenny Halevy { 1018d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1019d7682988SBenny Halevy 1020d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1021d7682988SBenny Halevy return; 1022d7682988SBenny Halevy if (is_client_expired(clp)) { 1023d7682988SBenny Halevy free_client(clp); 1024d7682988SBenny Halevy session->se_client = NULL; 1025d7682988SBenny Halevy } else 1026d7682988SBenny Halevy renew_client_locked(clp); 1027d7682988SBenny Halevy spin_unlock(&client_lock); 1028d7682988SBenny Halevy } 1029d7682988SBenny Halevy 103084d38ac9SBenny Halevy /* must be called under the client_lock */ 103184d38ac9SBenny Halevy static inline void 103284d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 103384d38ac9SBenny Halevy { 1034792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1035792c95ddSJ. Bruce Fields 103607cd4909SBenny Halevy mark_client_expired(clp); 103784d38ac9SBenny Halevy list_del(&clp->cl_lru); 10384c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1039792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1040792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 10414c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 104284d38ac9SBenny Halevy } 104384d38ac9SBenny Halevy 10441da177e4SLinus Torvalds static void 10451da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 10461da177e4SLinus Torvalds { 1047fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 10481da177e4SLinus Torvalds struct nfs4_delegation *dp; 10491da177e4SLinus Torvalds struct list_head reaplist; 10501da177e4SLinus Torvalds 10511da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 10521da177e4SLinus Torvalds spin_lock(&recall_lock); 1053ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1054ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1055ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 10561da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds spin_unlock(&recall_lock); 10591da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 10601da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 10611da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 10621da177e4SLinus Torvalds unhash_delegation(dp); 10631da177e4SLinus Torvalds } 1064ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1065fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1066fe0750e5SJ. Bruce Fields release_openowner(oo); 10671da177e4SLinus Torvalds } 10686ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 10692bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 10702bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 107184d38ac9SBenny Halevy list_del(&clp->cl_idhash); 107284d38ac9SBenny Halevy list_del(&clp->cl_strhash); 107384d38ac9SBenny Halevy spin_lock(&client_lock); 107484d38ac9SBenny Halevy unhash_client_locked(clp); 107546583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1076b12a05cbSJ. Bruce Fields free_client(clp); 107746583e25SBenny Halevy spin_unlock(&client_lock); 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds 108035bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 108135bba9a3SJ. Bruce Fields { 108235bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 108335bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 10841da177e4SLinus Torvalds } 10851da177e4SLinus Torvalds 108635bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 108735bba9a3SJ. Bruce Fields { 10881da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 10891da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds 109235bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 109335bba9a3SJ. Bruce Fields { 10941da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 10951da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 10961da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 10971da177e4SLinus Torvalds get_group_info(target->cr_group_info); 10981da177e4SLinus Torvalds } 10991da177e4SLinus Torvalds 110035bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1101599e0a22SJ. Bruce Fields { 1102a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds static int 1106599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1107599e0a22SJ. Bruce Fields { 1108599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 11091da177e4SLinus Torvalds } 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds static int 1112599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1113599e0a22SJ. Bruce Fields { 1114599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 11151da177e4SLinus Torvalds } 11161da177e4SLinus Torvalds 11171da177e4SLinus Torvalds /* XXX what about NGROUP */ 11181da177e4SLinus Torvalds static int 1119599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1120599e0a22SJ. Bruce Fields { 1121599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 11221da177e4SLinus Torvalds } 11231da177e4SLinus Torvalds 11245ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 11255ec7b46cSJ. Bruce Fields { 11265ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 11275ec7b46cSJ. Bruce Fields 11281da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 11291da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds 1132deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1133deda2faaSJ. Bruce Fields { 1134deda2faaSJ. Bruce Fields static u32 i; 11351da177e4SLinus Torvalds u32 *p; 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 1138deda2faaSJ. Bruce Fields *p++ = get_seconds(); 1139deda2faaSJ. Bruce Fields *p++ = i++; 11401da177e4SLinus Torvalds } 11411da177e4SLinus Torvalds 114238c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 11434581d140SJ. Bruce Fields { 114438c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 11454581d140SJ. Bruce Fields } 11464d71ab87SJ. Bruce Fields 114738c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1148f459e453SJ. Bruce Fields { 1149f459e453SJ. Bruce Fields struct nfs4_stid *s; 1150f459e453SJ. Bruce Fields 115138c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1152f459e453SJ. Bruce Fields if (!s) 1153f459e453SJ. Bruce Fields return NULL; 1154f459e453SJ. Bruce Fields if (typemask & s->sc_type) 11554d71ab87SJ. Bruce Fields return s; 11564581d140SJ. Bruce Fields return NULL; 11574581d140SJ. Bruce Fields } 11584581d140SJ. Bruce Fields 1159b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1160b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1161b09333c4SRicardo Labiaga { 1162b09333c4SRicardo Labiaga struct nfs4_client *clp; 1163b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1164b09333c4SRicardo Labiaga char *princ; 1165b09333c4SRicardo Labiaga 1166b09333c4SRicardo Labiaga clp = alloc_client(name); 1167b09333c4SRicardo Labiaga if (clp == NULL) 1168b09333c4SRicardo Labiaga return NULL; 1169b09333c4SRicardo Labiaga 1170792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1171792c95ddSJ. Bruce Fields 1172b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1173b09333c4SRicardo Labiaga if (princ) { 1174b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1175b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1176b09333c4SRicardo Labiaga free_client(clp); 1177b09333c4SRicardo Labiaga return NULL; 1178b09333c4SRicardo Labiaga } 1179b09333c4SRicardo Labiaga } 1180b09333c4SRicardo Labiaga 118138c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1182b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 118346583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 118477a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1185b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1186b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1187b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1188b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1189b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 11905ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 11916ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1192cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 119307cd4909SBenny Halevy clp->cl_time = get_seconds(); 1194b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1195b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1196b09333c4SRicardo Labiaga copy_verf(clp, verf); 1197b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1198b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1199b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1200b09333c4SRicardo Labiaga gen_confirm(clp); 1201edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1202b09333c4SRicardo Labiaga return clp; 1203b09333c4SRicardo Labiaga } 1204b09333c4SRicardo Labiaga 1205fd39ca9aSNeilBrown static void 12061da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 12071da177e4SLinus Torvalds { 12081da177e4SLinus Torvalds unsigned int idhashval; 12091da177e4SLinus Torvalds 12101da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 12111da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 12121da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 121336acb66bSBenny Halevy renew_client(clp); 12141da177e4SLinus Torvalds } 12151da177e4SLinus Torvalds 1216fd39ca9aSNeilBrown static void 12171da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 12181da177e4SLinus Torvalds { 12191da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 12201da177e4SLinus Torvalds unsigned int strhashval; 12211da177e4SLinus Torvalds 12221da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1223f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1224a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1225328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 12261da177e4SLinus Torvalds renew_client(clp); 12271da177e4SLinus Torvalds } 12281da177e4SLinus Torvalds 12291da177e4SLinus Torvalds static struct nfs4_client * 12301da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 12311da177e4SLinus Torvalds { 12321da177e4SLinus Torvalds struct nfs4_client *clp; 12331da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 12341da177e4SLinus Torvalds 12351da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1236a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1237a50d2ad1SJ. Bruce Fields renew_client(clp); 12381da177e4SLinus Torvalds return clp; 12391da177e4SLinus Torvalds } 1240a50d2ad1SJ. Bruce Fields } 12411da177e4SLinus Torvalds return NULL; 12421da177e4SLinus Torvalds } 12431da177e4SLinus Torvalds 12441da177e4SLinus Torvalds static struct nfs4_client * 12451da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 12461da177e4SLinus Torvalds { 12471da177e4SLinus Torvalds struct nfs4_client *clp; 12481da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 12491da177e4SLinus Torvalds 12501da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1251599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 12521da177e4SLinus Torvalds return clp; 12531da177e4SLinus Torvalds } 12541da177e4SLinus Torvalds return NULL; 12551da177e4SLinus Torvalds } 12561da177e4SLinus Torvalds 12576e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1258a1bcecd2SAndy Adamson { 12596e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1260a1bcecd2SAndy Adamson } 1261a1bcecd2SAndy Adamson 126228ce6054SNeilBrown static struct nfs4_client * 1263e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 126428ce6054SNeilBrown { 126528ce6054SNeilBrown struct nfs4_client *clp; 126628ce6054SNeilBrown 126728ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1268e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 126928ce6054SNeilBrown return clp; 127028ce6054SNeilBrown } 127128ce6054SNeilBrown return NULL; 127228ce6054SNeilBrown } 127328ce6054SNeilBrown 127428ce6054SNeilBrown static struct nfs4_client * 1275e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 127628ce6054SNeilBrown { 127728ce6054SNeilBrown struct nfs4_client *clp; 127828ce6054SNeilBrown 127928ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1280e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 128128ce6054SNeilBrown return clp; 128228ce6054SNeilBrown } 128328ce6054SNeilBrown return NULL; 128428ce6054SNeilBrown } 128528ce6054SNeilBrown 1286fd39ca9aSNeilBrown static void 12876f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 12881da177e4SLinus Torvalds { 128907263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 12906f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 12916f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 12927077ecbaSJeff Layton unsigned short expected_family; 12931da177e4SLinus Torvalds 12947077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 12957077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 12967077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 12977077ecbaSJeff Layton expected_family = AF_INET; 12987077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 12997077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 13007077ecbaSJeff Layton expected_family = AF_INET6; 13017077ecbaSJeff Layton else 13021da177e4SLinus Torvalds goto out_err; 13031da177e4SLinus Torvalds 130407263f1eSJ. Bruce Fields conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, 1305aa9a4ec7SJeff Layton se->se_callback_addr_len, 130607263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 130707263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1308aa9a4ec7SJeff Layton 130907263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 13101da177e4SLinus Torvalds goto out_err; 1311aa9a4ec7SJeff Layton 131207263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 131307263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1314fbf4665fSJeff Layton 131507263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 131607263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1317849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 13181da177e4SLinus Torvalds return; 13191da177e4SLinus Torvalds out_err: 132007263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 132107263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1322849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 13231da177e4SLinus Torvalds "will not receive delegations\n", 13241da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvalds return; 13271da177e4SLinus Torvalds } 13281da177e4SLinus Torvalds 1329074fe897SAndy Adamson /* 1330557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1331074fe897SAndy Adamson */ 1332074fe897SAndy Adamson void 1333074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1334074fe897SAndy Adamson { 1335557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1336557ce264SAndy Adamson unsigned int base; 1337074fe897SAndy Adamson 1338557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1339074fe897SAndy Adamson 1340557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1341557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1342bf864a31SAndy Adamson 1343bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1344557ce264SAndy Adamson slot->sl_datalen = 0; 1345bf864a31SAndy Adamson return; 1346bf864a31SAndy Adamson } 1347557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1348557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1349557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1350557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1351557ce264SAndy Adamson slot->sl_datalen)) 1352557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1353557ce264SAndy Adamson return; 1354074fe897SAndy Adamson } 1355074fe897SAndy Adamson 1356074fe897SAndy Adamson /* 1357abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1358abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1359abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1360abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1361abfabf8cSAndy Adamson * 1362074fe897SAndy Adamson */ 1363abfabf8cSAndy Adamson static __be32 1364abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1365abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1366074fe897SAndy Adamson { 1367abfabf8cSAndy Adamson struct nfsd4_op *op; 1368abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1369074fe897SAndy Adamson 1370abfabf8cSAndy Adamson dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, 1371557ce264SAndy Adamson resp->opcnt, resp->cstate.slot->sl_cachethis); 1372abfabf8cSAndy Adamson 1373abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1374abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1375abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1376abfabf8cSAndy Adamson 1377abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 1378557ce264SAndy Adamson if (args->opcnt > 1 && slot->sl_cachethis == 0) { 1379abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1380abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1381abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1382074fe897SAndy Adamson } 1383abfabf8cSAndy Adamson return op->status; 1384074fe897SAndy Adamson } 1385074fe897SAndy Adamson 1386074fe897SAndy Adamson /* 1387557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1388557ce264SAndy Adamson * session values. 1389074fe897SAndy Adamson */ 1390074fe897SAndy Adamson __be32 1391bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1392bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1393074fe897SAndy Adamson { 1394557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1395074fe897SAndy Adamson __be32 status; 1396074fe897SAndy Adamson 1397557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1398074fe897SAndy Adamson 1399abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1400abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1401abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1402abfabf8cSAndy Adamson return status; 1403074fe897SAndy Adamson 1404557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1405557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1406074fe897SAndy Adamson 1407557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1408557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1409557ce264SAndy Adamson status = slot->sl_status; 1410074fe897SAndy Adamson 1411074fe897SAndy Adamson return status; 1412074fe897SAndy Adamson } 1413074fe897SAndy Adamson 14140733d213SAndy Adamson /* 14150733d213SAndy Adamson * Set the exchange_id flags returned by the server. 14160733d213SAndy Adamson */ 14170733d213SAndy Adamson static void 14180733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 14190733d213SAndy Adamson { 14200733d213SAndy Adamson /* pNFS is not supported */ 14210733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 14220733d213SAndy Adamson 14230733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 14240733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 14250733d213SAndy Adamson 14260733d213SAndy Adamson /* set the wire flags to return to client. */ 14270733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 14280733d213SAndy Adamson } 14290733d213SAndy Adamson 1430b37ad28bSAl Viro __be32 1431069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1432069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1433069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1434069b6ad4SAndy Adamson { 14350733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 14360733d213SAndy Adamson int status; 14370733d213SAndy Adamson unsigned int strhashval; 14380733d213SAndy Adamson char dname[HEXDIR_LEN]; 1439363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 14400733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1441363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 14420733d213SAndy Adamson 1443363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 14440733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1445363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 14460733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1447363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 14480733d213SAndy Adamson 1449a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 14500733d213SAndy Adamson return nfserr_inval; 14510733d213SAndy Adamson 14520733d213SAndy Adamson /* Currently only support SP4_NONE */ 14530733d213SAndy Adamson switch (exid->spa_how) { 14540733d213SAndy Adamson case SP4_NONE: 14550733d213SAndy Adamson break; 14560733d213SAndy Adamson case SP4_SSV: 1457044bc1d4SJ. Bruce Fields return nfserr_serverfault; 14580733d213SAndy Adamson default: 14590733d213SAndy Adamson BUG(); /* checked by xdr code */ 14600733d213SAndy Adamson case SP4_MACH_CRED: 14610733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 14620733d213SAndy Adamson } 14630733d213SAndy Adamson 14640733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 14650733d213SAndy Adamson 14660733d213SAndy Adamson if (status) 14670733d213SAndy Adamson goto error; 14680733d213SAndy Adamson 14690733d213SAndy Adamson strhashval = clientstr_hashval(dname); 14700733d213SAndy Adamson 14710733d213SAndy Adamson nfs4_lock_state(); 14720733d213SAndy Adamson status = nfs_ok; 14730733d213SAndy Adamson 1474e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 14750733d213SAndy Adamson if (conf) { 1476e203d506SJ. Bruce Fields if (!clp_used_exchangeid(conf)) { 1477e203d506SJ. Bruce Fields status = nfserr_clid_inuse; /* XXX: ? */ 1478e203d506SJ. Bruce Fields goto out; 1479e203d506SJ. Bruce Fields } 14800733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 14810733d213SAndy Adamson /* 18.35.4 case 8 */ 14820733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14830733d213SAndy Adamson status = nfserr_not_same; 14840733d213SAndy Adamson goto out; 14850733d213SAndy Adamson } 14860733d213SAndy Adamson /* Client reboot: destroy old state */ 14870733d213SAndy Adamson expire_client(conf); 14880733d213SAndy Adamson goto out_new; 14890733d213SAndy Adamson } 14900733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 14910733d213SAndy Adamson /* 18.35.4 case 9 */ 14920733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14930733d213SAndy Adamson status = nfserr_perm; 14940733d213SAndy Adamson goto out; 14950733d213SAndy Adamson } 14960733d213SAndy Adamson expire_client(conf); 14970733d213SAndy Adamson goto out_new; 14980733d213SAndy Adamson } 14990733d213SAndy Adamson /* 15000733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 15010733d213SAndy Adamson * confirmed client id (18.35.3). 15020733d213SAndy Adamson */ 15030733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 15040733d213SAndy Adamson 15050733d213SAndy Adamson /* 15060733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 15070733d213SAndy Adamson * Leave confirmed record intact and return same result. 15080733d213SAndy Adamson */ 15090733d213SAndy Adamson copy_verf(conf, &verf); 15100733d213SAndy Adamson new = conf; 15110733d213SAndy Adamson goto out_copy; 15126ddbbbfeSMike Sager } 15136ddbbbfeSMike Sager 15140733d213SAndy Adamson /* 18.35.4 case 7 */ 15150733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15160733d213SAndy Adamson status = nfserr_noent; 15170733d213SAndy Adamson goto out; 15180733d213SAndy Adamson } 15190733d213SAndy Adamson 1520e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 15210733d213SAndy Adamson if (unconf) { 15220733d213SAndy Adamson /* 15230733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 15240733d213SAndy Adamson * a new unconfirmed record should be generated regardless 15250733d213SAndy Adamson * of whether any properties have changed. 15260733d213SAndy Adamson */ 15270733d213SAndy Adamson expire_client(unconf); 15280733d213SAndy Adamson } 15290733d213SAndy Adamson 15300733d213SAndy Adamson out_new: 15310733d213SAndy Adamson /* Normal case */ 1532b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 15330733d213SAndy Adamson if (new == NULL) { 15344731030dSJ. Bruce Fields status = nfserr_jukebox; 15350733d213SAndy Adamson goto out; 15360733d213SAndy Adamson } 15370733d213SAndy Adamson 15380733d213SAndy Adamson gen_clid(new); 15390733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 15400733d213SAndy Adamson out_copy: 15410733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 15420733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 15430733d213SAndy Adamson 154438eb76a5SAndy Adamson exid->seqid = 1; 15450733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 15460733d213SAndy Adamson 15470733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 154849557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 15490733d213SAndy Adamson status = nfs_ok; 15500733d213SAndy Adamson 15510733d213SAndy Adamson out: 15520733d213SAndy Adamson nfs4_unlock_state(); 15530733d213SAndy Adamson error: 15540733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 15550733d213SAndy Adamson return status; 1556069b6ad4SAndy Adamson } 1557069b6ad4SAndy Adamson 1558b85d4c01SBenny Halevy static int 155988e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1560b85d4c01SBenny Halevy { 156188e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 156288e588d5SAndy Adamson slot_seqid); 1563b85d4c01SBenny Halevy 1564b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 156588e588d5SAndy Adamson if (slot_inuse) { 156688e588d5SAndy Adamson if (seqid == slot_seqid) 1567b85d4c01SBenny Halevy return nfserr_jukebox; 1568b85d4c01SBenny Halevy else 1569b85d4c01SBenny Halevy return nfserr_seq_misordered; 1570b85d4c01SBenny Halevy } 1571b85d4c01SBenny Halevy /* Normal */ 157288e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1573b85d4c01SBenny Halevy return nfs_ok; 1574b85d4c01SBenny Halevy /* Replay */ 157588e588d5SAndy Adamson if (seqid == slot_seqid) 1576b85d4c01SBenny Halevy return nfserr_replay_cache; 1577b85d4c01SBenny Halevy /* Wraparound */ 157888e588d5SAndy Adamson if (seqid == 1 && (slot_seqid + 1) == 0) 1579b85d4c01SBenny Halevy return nfs_ok; 1580b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1581b85d4c01SBenny Halevy return nfserr_seq_misordered; 1582b85d4c01SBenny Halevy } 1583b85d4c01SBenny Halevy 158449557cc7SAndy Adamson /* 158549557cc7SAndy Adamson * Cache the create session result into the create session single DRC 158649557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 158749557cc7SAndy Adamson * Do this for solo or embedded create session operations. 158849557cc7SAndy Adamson */ 158949557cc7SAndy Adamson static void 159049557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 159149557cc7SAndy Adamson struct nfsd4_clid_slot *slot, int nfserr) 159249557cc7SAndy Adamson { 159349557cc7SAndy Adamson slot->sl_status = nfserr; 159449557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 159549557cc7SAndy Adamson } 159649557cc7SAndy Adamson 159749557cc7SAndy Adamson static __be32 159849557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 159949557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 160049557cc7SAndy Adamson { 160149557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 160249557cc7SAndy Adamson return slot->sl_status; 160349557cc7SAndy Adamson } 160449557cc7SAndy Adamson 16051b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 16061b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 16071b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 16081b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 16091b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 16101b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 16111b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 16121b74c25bSMi Jinlong 16131b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 16141b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 16151b74c25bSMi Jinlong 1 + /* status */ \ 16161b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 16171b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 16181b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 16191b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 16201b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 16211b74c25bSMi Jinlong 16221b74c25bSMi Jinlong static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 16231b74c25bSMi Jinlong { 16241b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 16251b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 16261b74c25bSMi Jinlong } 16271b74c25bSMi Jinlong 1628069b6ad4SAndy Adamson __be32 1629069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1630069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1631069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1632069b6ad4SAndy Adamson { 1633363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1634ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1635ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 163649557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 163786c3e16cSJ. Bruce Fields bool confirm_me = false; 1638ec6b5d7bSAndy Adamson int status = 0; 1639ec6b5d7bSAndy Adamson 1640a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1641a62573dcSMi Jinlong return nfserr_inval; 1642a62573dcSMi Jinlong 1643ec6b5d7bSAndy Adamson nfs4_lock_state(); 1644ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1645ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1646ec6b5d7bSAndy Adamson 1647ec6b5d7bSAndy Adamson if (conf) { 164849557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 164949557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 165038eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1651ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 165249557cc7SAndy Adamson cs_slot->sl_seqid); 165338eb76a5SAndy Adamson /* Return the cached reply status */ 165449557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 165538eb76a5SAndy Adamson goto out; 165649557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1657ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1658ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1659ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 166049557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1661ec6b5d7bSAndy Adamson goto out; 1662ec6b5d7bSAndy Adamson } 1663ec6b5d7bSAndy Adamson } else if (unconf) { 1664ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1665363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1666ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1667ec6b5d7bSAndy Adamson goto out; 1668ec6b5d7bSAndy Adamson } 1669ec6b5d7bSAndy Adamson 167049557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 167149557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 167238eb76a5SAndy Adamson if (status) { 167338eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1674ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1675cd5b8144SJ. Bruce Fields goto out; 1676ec6b5d7bSAndy Adamson } 1677ec6b5d7bSAndy Adamson 167886c3e16cSJ. Bruce Fields confirm_me = true; 1679ec6b5d7bSAndy Adamson conf = unconf; 1680ec6b5d7bSAndy Adamson } else { 1681ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1682ec6b5d7bSAndy Adamson goto out; 1683ec6b5d7bSAndy Adamson } 1684ec6b5d7bSAndy Adamson 1685408b79bcSJ. Bruce Fields /* 16868323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 16878323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 16888323c3b2SJ. Bruce Fields */ 16898323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 16908323c3b2SJ. Bruce Fields /* 1691408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1692408b79bcSJ. Bruce Fields */ 1693408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1694408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1695408b79bcSJ. Bruce Fields 16961b74c25bSMi Jinlong status = nfserr_toosmall; 16971b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 16981b74c25bSMi Jinlong goto out; 16991b74c25bSMi Jinlong 1700ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1701ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1702ac7c46f2SJ. Bruce Fields if (!new) 1703ec6b5d7bSAndy Adamson goto out; 1704ac7c46f2SJ. Bruce Fields status = nfs_ok; 1705ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1706ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 170712050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 170812050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 170986c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 171049557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1711ec6b5d7bSAndy Adamson 171249557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 171349557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 171486c3e16cSJ. Bruce Fields if (confirm_me) 171586c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1716ec6b5d7bSAndy Adamson out: 1717ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1718ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1719ec6b5d7bSAndy Adamson return status; 1720069b6ad4SAndy Adamson } 1721069b6ad4SAndy Adamson 172257716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 172357716355SJ. Bruce Fields { 172457716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 172557716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 172657716355SJ. Bruce Fields 172757716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 172857716355SJ. Bruce Fields } 172957716355SJ. Bruce Fields 17301d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 17311d1bc8f2SJ. Bruce Fields { 17321d1bc8f2SJ. Bruce Fields switch (*dir) { 17331d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 17341d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 17351d1bc8f2SJ. Bruce Fields return nfs_ok; 17361d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 17371d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 17381d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 17391d1bc8f2SJ. Bruce Fields return nfs_ok; 17401d1bc8f2SJ. Bruce Fields }; 17411d1bc8f2SJ. Bruce Fields return nfserr_inval; 17421d1bc8f2SJ. Bruce Fields } 17431d1bc8f2SJ. Bruce Fields 17441d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 17451d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 17461d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 17471d1bc8f2SJ. Bruce Fields { 17481d1bc8f2SJ. Bruce Fields __be32 status; 17491d1bc8f2SJ. Bruce Fields 17501d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 17511d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 17521d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 17531d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 17541d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 17551d1bc8f2SJ. Bruce Fields * client_lock iself: */ 17561d1bc8f2SJ. Bruce Fields if (cstate->session) { 17571d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 17581d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 17591d1bc8f2SJ. Bruce Fields } 17601d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 17611d1bc8f2SJ. Bruce Fields if (!cstate->session) 17621d1bc8f2SJ. Bruce Fields return nfserr_badsession; 17631d1bc8f2SJ. Bruce Fields 17641d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 17651db2b9ddSBryan Schumaker if (!status) 17661d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 17671db2b9ddSBryan Schumaker return status; 17681d1bc8f2SJ. Bruce Fields } 17691d1bc8f2SJ. Bruce Fields 17705d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 17715d4cec2fSJ. Bruce Fields { 17725d4cec2fSJ. Bruce Fields if (!session) 17735d4cec2fSJ. Bruce Fields return 0; 17745d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 17755d4cec2fSJ. Bruce Fields } 17765d4cec2fSJ. Bruce Fields 1777069b6ad4SAndy Adamson __be32 1778069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1779069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1780069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1781069b6ad4SAndy Adamson { 1782e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1783e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1784e10e0cfcSBenny Halevy 1785e10e0cfcSBenny Halevy /* Notes: 1786e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1787e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1788e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1789e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1790e10e0cfcSBenny Halevy */ 1791e10e0cfcSBenny Halevy 17925d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 179357716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 179457716355SJ. Bruce Fields return nfserr_not_only_op; 179557716355SJ. Bruce Fields } 1796e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 17979089f1b4SBenny Halevy spin_lock(&client_lock); 1798e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1799e10e0cfcSBenny Halevy if (!ses) { 18009089f1b4SBenny Halevy spin_unlock(&client_lock); 1801e10e0cfcSBenny Halevy goto out; 1802e10e0cfcSBenny Halevy } 1803e10e0cfcSBenny Halevy 1804e10e0cfcSBenny Halevy unhash_session(ses); 18059089f1b4SBenny Halevy spin_unlock(&client_lock); 1806e10e0cfcSBenny Halevy 1807ab707e15SBenny Halevy nfs4_lock_state(); 180884f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1809ab707e15SBenny Halevy nfs4_unlock_state(); 181019cf5c02SJ. Bruce Fields 181119cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 181219cf5c02SJ. Bruce Fields 1813e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1814e10e0cfcSBenny Halevy status = nfs_ok; 1815e10e0cfcSBenny Halevy out: 1816e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1817e10e0cfcSBenny Halevy return status; 1818069b6ad4SAndy Adamson } 1819069b6ad4SAndy Adamson 1820a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1821328ead28SJ. Bruce Fields { 1822328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1823328ead28SJ. Bruce Fields 1824328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1825a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1826328ead28SJ. Bruce Fields return c; 1827328ead28SJ. Bruce Fields } 1828328ead28SJ. Bruce Fields } 1829328ead28SJ. Bruce Fields return NULL; 1830328ead28SJ. Bruce Fields } 1831328ead28SJ. Bruce Fields 1832a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1833328ead28SJ. Bruce Fields { 1834328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1835a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 183621b75b01SJ. Bruce Fields int ret; 1837328ead28SJ. Bruce Fields 1838328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1839a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1840328ead28SJ. Bruce Fields if (c) { 1841328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1842328ead28SJ. Bruce Fields free_conn(new); 1843328ead28SJ. Bruce Fields return; 1844328ead28SJ. Bruce Fields } 1845328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1846328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 184721b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 184821b75b01SJ. Bruce Fields if (ret) 184921b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 185021b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1851328ead28SJ. Bruce Fields return; 1852328ead28SJ. Bruce Fields } 1853328ead28SJ. Bruce Fields 1854868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1855868b89c3SMi Jinlong { 1856868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1857868b89c3SMi Jinlong 1858868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1859868b89c3SMi Jinlong } 1860868b89c3SMi Jinlong 1861ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1862ae82a8d0SMi Jinlong struct nfsd4_session *session) 1863ae82a8d0SMi Jinlong { 1864ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1865ae82a8d0SMi Jinlong 1866ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1867ae82a8d0SMi Jinlong } 1868ae82a8d0SMi Jinlong 1869069b6ad4SAndy Adamson __be32 1870b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1871069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1872069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1873069b6ad4SAndy Adamson { 1874f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1875b85d4c01SBenny Halevy struct nfsd4_session *session; 1876b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1877a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 1878b85d4c01SBenny Halevy int status; 1879b85d4c01SBenny Halevy 1880f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1881f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1882f9bb94c4SAndy Adamson 1883a663bdd8SJ. Bruce Fields /* 1884a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1885a663bdd8SJ. Bruce Fields * below. 1886a663bdd8SJ. Bruce Fields */ 1887a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1888a663bdd8SJ. Bruce Fields if (!conn) 1889a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1890a663bdd8SJ. Bruce Fields 18919089f1b4SBenny Halevy spin_lock(&client_lock); 1892b85d4c01SBenny Halevy status = nfserr_badsession; 1893b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1894b85d4c01SBenny Halevy if (!session) 1895b85d4c01SBenny Halevy goto out; 1896b85d4c01SBenny Halevy 1897868b89c3SMi Jinlong status = nfserr_too_many_ops; 1898868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 1899868b89c3SMi Jinlong goto out; 1900868b89c3SMi Jinlong 1901ae82a8d0SMi Jinlong status = nfserr_req_too_big; 1902ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 1903ae82a8d0SMi Jinlong goto out; 1904ae82a8d0SMi Jinlong 1905b85d4c01SBenny Halevy status = nfserr_badslot; 19066c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1907b85d4c01SBenny Halevy goto out; 1908b85d4c01SBenny Halevy 1909557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1910b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1911b85d4c01SBenny Halevy 1912a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1913a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1914a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1915a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1916a8dfdaebSAndy Adamson 191788e588d5SAndy Adamson status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); 1918b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1919b85d4c01SBenny Halevy cstate->slot = slot; 1920b85d4c01SBenny Halevy cstate->session = session; 1921da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1922557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1923bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1924da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1925aaf84eb9SBenny Halevy goto out; 1926b85d4c01SBenny Halevy } 1927b85d4c01SBenny Halevy if (status) 1928b85d4c01SBenny Halevy goto out; 1929b85d4c01SBenny Halevy 1930a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 1931a663bdd8SJ. Bruce Fields conn = NULL; 1932328ead28SJ. Bruce Fields 1933b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1934b85d4c01SBenny Halevy slot->sl_inuse = true; 1935b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1936557ce264SAndy Adamson slot->sl_cachethis = seq->cachethis; 1937b85d4c01SBenny Halevy 1938b85d4c01SBenny Halevy cstate->slot = slot; 1939b85d4c01SBenny Halevy cstate->session = session; 1940b85d4c01SBenny Halevy 1941b85d4c01SBenny Halevy out: 194226c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 1943aaf84eb9SBenny Halevy if (cstate->session) { 19440d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 19450d7bb719SJ. Bruce Fields 194636acb66bSBenny Halevy nfsd4_get_session(cstate->session); 19470d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 19485423732aSBenny Halevy switch (clp->cl_cb_state) { 19495423732aSBenny Halevy case NFSD4_CB_DOWN: 1950fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 19515423732aSBenny Halevy break; 19525423732aSBenny Halevy case NFSD4_CB_FAULT: 1953fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 19545423732aSBenny Halevy break; 1955fc0c3dd1SBenny Halevy default: 1956fc0c3dd1SBenny Halevy seq->status_flags = 0; 19575423732aSBenny Halevy } 1958aaf84eb9SBenny Halevy } 1959a663bdd8SJ. Bruce Fields kfree(conn); 196036acb66bSBenny Halevy spin_unlock(&client_lock); 1961b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1962b85d4c01SBenny Halevy return status; 1963069b6ad4SAndy Adamson } 1964069b6ad4SAndy Adamson 1965345c2842SMi Jinlong static inline bool has_resources(struct nfs4_client *clp) 1966345c2842SMi Jinlong { 1967345c2842SMi Jinlong return !list_empty(&clp->cl_openowners) 1968345c2842SMi Jinlong || !list_empty(&clp->cl_delegations) 1969345c2842SMi Jinlong || !list_empty(&clp->cl_sessions); 1970345c2842SMi Jinlong } 1971345c2842SMi Jinlong 1972345c2842SMi Jinlong __be32 1973345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 1974345c2842SMi Jinlong { 1975345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 1976345c2842SMi Jinlong int status = 0; 1977345c2842SMi Jinlong 1978345c2842SMi Jinlong nfs4_lock_state(); 1979345c2842SMi Jinlong unconf = find_unconfirmed_client(&dc->clientid); 1980345c2842SMi Jinlong conf = find_confirmed_client(&dc->clientid); 1981345c2842SMi Jinlong 1982345c2842SMi Jinlong if (conf) { 1983345c2842SMi Jinlong clp = conf; 1984345c2842SMi Jinlong 1985345c2842SMi Jinlong if (!is_client_expired(conf) && has_resources(conf)) { 1986345c2842SMi Jinlong status = nfserr_clientid_busy; 1987345c2842SMi Jinlong goto out; 1988345c2842SMi Jinlong } 1989345c2842SMi Jinlong 1990345c2842SMi Jinlong /* rfc5661 18.50.3 */ 1991345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 1992345c2842SMi Jinlong status = nfserr_clientid_busy; 1993345c2842SMi Jinlong goto out; 1994345c2842SMi Jinlong } 1995345c2842SMi Jinlong } else if (unconf) 1996345c2842SMi Jinlong clp = unconf; 1997345c2842SMi Jinlong else { 1998345c2842SMi Jinlong status = nfserr_stale_clientid; 1999345c2842SMi Jinlong goto out; 2000345c2842SMi Jinlong } 2001345c2842SMi Jinlong 2002345c2842SMi Jinlong expire_client(clp); 2003345c2842SMi Jinlong out: 2004345c2842SMi Jinlong nfs4_unlock_state(); 2005345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2006345c2842SMi Jinlong return status; 2007345c2842SMi Jinlong } 2008345c2842SMi Jinlong 2009069b6ad4SAndy Adamson __be32 20104dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 20114dc6ec00SJ. Bruce Fields { 2012bcecf1ccSMi Jinlong int status = 0; 2013bcecf1ccSMi Jinlong 20144dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 20154dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 20164dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 20174dc6ec00SJ. Bruce Fields /* 20184dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 20194dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 20204dc6ec00SJ. Bruce Fields */ 20214dc6ec00SJ. Bruce Fields return nfs_ok; 20224dc6ec00SJ. Bruce Fields } 2023bcecf1ccSMi Jinlong 20244dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2025bcecf1ccSMi Jinlong status = nfserr_complete_already; 2026bcecf1ccSMi Jinlong if (cstate->session->se_client->cl_firststate) 2027bcecf1ccSMi Jinlong goto out; 2028bcecf1ccSMi Jinlong 2029bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2030bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 20314dc6ec00SJ. Bruce Fields /* 20324dc6ec00SJ. Bruce Fields * The following error isn't really legal. 20334dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 20344dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 20354dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 20364dc6ec00SJ. Bruce Fields * client. 20374dc6ec00SJ. Bruce Fields */ 2038bcecf1ccSMi Jinlong goto out; 2039bcecf1ccSMi Jinlong 2040bcecf1ccSMi Jinlong status = nfs_ok; 20414dc6ec00SJ. Bruce Fields nfsd4_create_clid_dir(cstate->session->se_client); 2042bcecf1ccSMi Jinlong out: 20434dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2044bcecf1ccSMi Jinlong return status; 20454dc6ec00SJ. Bruce Fields } 20464dc6ec00SJ. Bruce Fields 20474dc6ec00SJ. Bruce Fields __be32 2048b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2049b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 20501da177e4SLinus Torvalds { 2051a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 20521da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 20531da177e4SLinus Torvalds unsigned int strhashval; 205428ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2055b37ad28bSAl Viro __be32 status; 2056a55370a3SNeilBrown char dname[HEXDIR_LEN]; 20571da177e4SLinus Torvalds 2058a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2059a55370a3SNeilBrown if (status) 206073aea4ecSNeil Brown return status; 2061a55370a3SNeilBrown 20621da177e4SLinus Torvalds /* 20631da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 20641da177e4SLinus Torvalds * We get here on a DRC miss. 20651da177e4SLinus Torvalds */ 20661da177e4SLinus Torvalds 2067a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 20681da177e4SLinus Torvalds 20691da177e4SLinus Torvalds nfs4_lock_state(); 2070e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 207128ce6054SNeilBrown if (conf) { 2072a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 20731da177e4SLinus Torvalds status = nfserr_clid_inuse; 2074e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2075e203d506SJ. Bruce Fields goto out; 2076026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2077363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2078363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2079363168b4SJeff Layton sizeof(addr_str)); 2080026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2081363168b4SJeff Layton "at %s\n", addr_str); 20821da177e4SLinus Torvalds goto out; 20831da177e4SLinus Torvalds } 20841da177e4SLinus Torvalds } 2085a186e767SJ. Bruce Fields /* 2086a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 2087a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 2088a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 2089a186e767SJ. Bruce Fields */ 2090e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 20913e772463SJ. Bruce Fields status = nfserr_jukebox; 20921da177e4SLinus Torvalds if (!conf) { 20931da177e4SLinus Torvalds /* 2094a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 2095a186e767SJ. Bruce Fields * placed first, because it is the normal case 20961da177e4SLinus Torvalds */ 20971da177e4SLinus Torvalds if (unconf) 20981da177e4SLinus Torvalds expire_client(unconf); 2099b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2100a55370a3SNeilBrown if (new == NULL) 21011da177e4SLinus Torvalds goto out; 21021da177e4SLinus Torvalds gen_clid(new); 2103599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 21041da177e4SLinus Torvalds /* 2105a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 2106a186e767SJ. Bruce Fields * probable callback update 21071da177e4SLinus Torvalds */ 210831f4a6c1SNeilBrown if (unconf) { 210931f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 211031f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 211131f4a6c1SNeilBrown * This has the advantage that there is at most 211231f4a6c1SNeilBrown * one {*x***} in either list at any time. 211331f4a6c1SNeilBrown */ 21141da177e4SLinus Torvalds expire_client(unconf); 21151da177e4SLinus Torvalds } 2116b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2117a55370a3SNeilBrown if (new == NULL) 21181da177e4SLinus Torvalds goto out; 21191da177e4SLinus Torvalds copy_clid(new, conf); 21201da177e4SLinus Torvalds } else if (!unconf) { 21211da177e4SLinus Torvalds /* 2122a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 2123a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2124a186e767SJ. Bruce Fields * confirmed. 21251da177e4SLinus Torvalds */ 2126b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2127a55370a3SNeilBrown if (new == NULL) 21281da177e4SLinus Torvalds goto out; 21291da177e4SLinus Torvalds gen_clid(new); 213049ba8781SJ. Bruce Fields } else { 21311da177e4SLinus Torvalds /* 2132a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 2133a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2134a186e767SJ. Bruce Fields * confirmed. 21351da177e4SLinus Torvalds */ 21361da177e4SLinus Torvalds expire_client(unconf); 2137b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2138a55370a3SNeilBrown if (new == NULL) 21391da177e4SLinus Torvalds goto out; 21401da177e4SLinus Torvalds gen_clid(new); 21411da177e4SLinus Torvalds } 21428323c3b2SJ. Bruce Fields /* 21438323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 21448323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 21458323c3b2SJ. Bruce Fields */ 21468323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 21476f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2148c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 21491da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 21501da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 21511da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 21521da177e4SLinus Torvalds status = nfs_ok; 21531da177e4SLinus Torvalds out: 21541da177e4SLinus Torvalds nfs4_unlock_state(); 21551da177e4SLinus Torvalds return status; 21561da177e4SLinus Torvalds } 21571da177e4SLinus Torvalds 21581da177e4SLinus Torvalds 21591da177e4SLinus Torvalds /* 2160a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 2161a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 2162a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 21631da177e4SLinus Torvalds */ 2164b37ad28bSAl Viro __be32 2165b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2166b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2167b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 21681da177e4SLinus Torvalds { 2169363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 217021ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 21711da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 21721da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2173b37ad28bSAl Viro __be32 status; 21741da177e4SLinus Torvalds 21751da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 21761da177e4SLinus Torvalds return nfserr_stale_clientid; 21771da177e4SLinus Torvalds /* 21781da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 21791da177e4SLinus Torvalds * We get here on a DRC miss. 21801da177e4SLinus Torvalds */ 21811da177e4SLinus Torvalds 21821da177e4SLinus Torvalds nfs4_lock_state(); 218321ab45a4SNeilBrown 218421ab45a4SNeilBrown conf = find_confirmed_client(clid); 218521ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 218621ab45a4SNeilBrown 218722de4d83SNeilBrown status = nfserr_clid_inuse; 2188363168b4SJeff Layton if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) 21891da177e4SLinus Torvalds goto out; 2190363168b4SJeff Layton if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) 21911da177e4SLinus Torvalds goto out; 219221ab45a4SNeilBrown 2193a186e767SJ. Bruce Fields /* 2194a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 2195a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 2196a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 2197a186e767SJ. Bruce Fields */ 2198366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 2199a186e767SJ. Bruce Fields /* 2200a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 2201a186e767SJ. Bruce Fields * callback update 22027c79f737SNeilBrown */ 2203599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 22041da177e4SLinus Torvalds status = nfserr_clid_inuse; 22051da177e4SLinus Torvalds else { 22065a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22075a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22081a69c179SNeilBrown expire_client(unconf); 22091da177e4SLinus Torvalds status = nfs_ok; 22101a69c179SNeilBrown 22111da177e4SLinus Torvalds } 2212f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 2213a186e767SJ. Bruce Fields /* 2214a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 2215a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 2216a186e767SJ. Bruce Fields * do nothing. 22177c79f737SNeilBrown */ 2218599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22191da177e4SLinus Torvalds status = nfserr_clid_inuse; 222021ab45a4SNeilBrown else 22211da177e4SLinus Torvalds status = nfs_ok; 22227c79f737SNeilBrown } else if (!conf && unconf 2223599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 2224a186e767SJ. Bruce Fields /* 2225a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 2226a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 22271da177e4SLinus Torvalds */ 2228599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 22291da177e4SLinus Torvalds status = nfserr_clid_inuse; 22301da177e4SLinus Torvalds } else { 22311a69c179SNeilBrown unsigned int hash = 22321a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 22331a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2234e203d506SJ. Bruce Fields hash); 22351a69c179SNeilBrown if (conf) { 2236c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 22371a69c179SNeilBrown expire_client(conf); 22381a69c179SNeilBrown } 22391da177e4SLinus Torvalds move_to_confirmed(unconf); 224021ab45a4SNeilBrown conf = unconf; 22415a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22421a69c179SNeilBrown status = nfs_ok; 22431da177e4SLinus Torvalds } 2244599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 2245599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 22467c79f737SNeilBrown &confirm)))) { 2247a186e767SJ. Bruce Fields /* 2248a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 2249a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 22501da177e4SLinus Torvalds */ 22511da177e4SLinus Torvalds status = nfserr_stale_clientid; 22527c79f737SNeilBrown } else { 22531da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 225422de4d83SNeilBrown status = nfserr_clid_inuse; 225508e8987cSNeilBrown } 22561da177e4SLinus Torvalds out: 22571da177e4SLinus Torvalds nfs4_unlock_state(); 22581da177e4SLinus Torvalds return status; 22591da177e4SLinus Torvalds } 22601da177e4SLinus Torvalds 226132513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 22621da177e4SLinus Torvalds { 226332513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 226432513b40SJ. Bruce Fields } 226532513b40SJ. Bruce Fields 226632513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 226732513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 226832513b40SJ. Bruce Fields { 22691da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 22701da177e4SLinus Torvalds 22718b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 22721da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 22738beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 22748beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 22751da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 227647f9940cSMeelap Shah fp->fi_had_conflict = false; 2277acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2278f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2279f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 228047cee541SPavel Emelyanov spin_lock(&recall_lock); 228147cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 228247cee541SPavel Emelyanov spin_unlock(&recall_lock); 22831da177e4SLinus Torvalds } 22841da177e4SLinus Torvalds 22851da177e4SLinus Torvalds static void 2286e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2287e60d4398SNeilBrown { 2288e60d4398SNeilBrown if (*slab == NULL) 2289e60d4398SNeilBrown return; 22901a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2291e60d4398SNeilBrown *slab = NULL; 2292e60d4398SNeilBrown } 2293e60d4398SNeilBrown 2294e8ff2a84SJ. Bruce Fields void 2295e60d4398SNeilBrown nfsd4_free_slabs(void) 2296e60d4398SNeilBrown { 2297fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2298fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2299e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23005ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23015b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2302e60d4398SNeilBrown } 23031da177e4SLinus Torvalds 230472083396SBryan Schumaker int 23051da177e4SLinus Torvalds nfsd4_init_slabs(void) 23061da177e4SLinus Torvalds { 2307fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2308fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2309fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2310fe0750e5SJ. Bruce Fields goto out_nomem; 2311fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2312fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2313fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2314e60d4398SNeilBrown goto out_nomem; 2315e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 231620c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2317e60d4398SNeilBrown if (file_slab == NULL) 2318e60d4398SNeilBrown goto out_nomem; 23195ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2320dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23215ac049acSNeilBrown if (stateid_slab == NULL) 23225ac049acSNeilBrown goto out_nomem; 23235b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 232420c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23255b2d21c1SNeilBrown if (deleg_slab == NULL) 23265b2d21c1SNeilBrown goto out_nomem; 2327e60d4398SNeilBrown return 0; 2328e60d4398SNeilBrown out_nomem: 2329e60d4398SNeilBrown nfsd4_free_slabs(); 23301da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23311da177e4SLinus Torvalds return -ENOMEM; 23321da177e4SLinus Torvalds } 23331da177e4SLinus Torvalds 2334fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23351da177e4SLinus Torvalds { 2336fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2337fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2338fe0750e5SJ. Bruce Fields } 2339fe0750e5SJ. Bruce Fields 2340fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2341fe0750e5SJ. Bruce Fields { 2342fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2343fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23441da177e4SLinus Torvalds } 23451da177e4SLinus Torvalds 2346ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2347ff194bd9SJ. Bruce Fields { 2348ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2349ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2350ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2351ff194bd9SJ. Bruce Fields } 2352ff194bd9SJ. Bruce Fields 2353fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 23541da177e4SLinus Torvalds { 23551da177e4SLinus Torvalds struct nfs4_stateowner *sop; 23561da177e4SLinus Torvalds 2357fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2358ff194bd9SJ. Bruce Fields if (!sop) 2359ff194bd9SJ. Bruce Fields return NULL; 2360ff194bd9SJ. Bruce Fields 2361ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2362ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2363fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2364ff194bd9SJ. Bruce Fields return NULL; 2365ff194bd9SJ. Bruce Fields } 23661da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2367ff194bd9SJ. Bruce Fields 2368ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2369ff194bd9SJ. Bruce Fields sop->so_client = clp; 2370ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 23711da177e4SLinus Torvalds return sop; 23721da177e4SLinus Torvalds } 2373ff194bd9SJ. Bruce Fields 2374fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2375ff194bd9SJ. Bruce Fields { 237616bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2377fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 23781da177e4SLinus Torvalds } 23791da177e4SLinus Torvalds 2380fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 23811da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2382fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 23831da177e4SLinus Torvalds 2384fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2385fe0750e5SJ. Bruce Fields if (!oo) 23861da177e4SLinus Torvalds return NULL; 2387fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2388fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2389d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2390fe0750e5SJ. Bruce Fields oo->oo_time = 0; 239138c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2392fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2393fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2394fe0750e5SJ. Bruce Fields return oo; 23951da177e4SLinus Torvalds } 23961da177e4SLinus Torvalds 2397996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2398fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2399d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24001da177e4SLinus Torvalds 2401996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2402ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2403fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24048beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2405fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 240613cd2184SNeilBrown get_nfs4_file(fp); 24071da177e4SLinus Torvalds stp->st_file = fp; 24081da177e4SLinus Torvalds stp->st_access_bmap = 0; 24091da177e4SLinus Torvalds stp->st_deny_bmap = 0; 2410b6d2f1caSJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 24111da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 24124c4cd222SNeilBrown stp->st_openstp = NULL; 24131da177e4SLinus Torvalds } 24141da177e4SLinus Torvalds 24151da177e4SLinus Torvalds static void 2416fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24171da177e4SLinus Torvalds { 2418fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24191da177e4SLinus Torvalds 2420fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2421fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24221da177e4SLinus Torvalds } 24231da177e4SLinus Torvalds 24241da177e4SLinus Torvalds static int 2425599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2426599e0a22SJ. Bruce Fields clientid_t *clid) 2427599e0a22SJ. Bruce Fields { 2428599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2429599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2430599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24311da177e4SLinus Torvalds } 24321da177e4SLinus Torvalds 2433fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24341da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 24351da177e4SLinus Torvalds { 2436a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2437a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 24381da177e4SLinus Torvalds 243916bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 244016bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 244116bfdaafSJ. Bruce Fields continue; 2442a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2443a50d2ad1SJ. Bruce Fields oo = openowner(so); 2444a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2445a50d2ad1SJ. Bruce Fields return oo; 2446a50d2ad1SJ. Bruce Fields } 24471da177e4SLinus Torvalds } 24481da177e4SLinus Torvalds return NULL; 24491da177e4SLinus Torvalds } 24501da177e4SLinus Torvalds 24511da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 24521da177e4SLinus Torvalds static struct nfs4_file * 24531da177e4SLinus Torvalds find_file(struct inode *ino) 24541da177e4SLinus Torvalds { 24551da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 24561da177e4SLinus Torvalds struct nfs4_file *fp; 24571da177e4SLinus Torvalds 24588b671b80SJ. Bruce Fields spin_lock(&recall_lock); 24591da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 246013cd2184SNeilBrown if (fp->fi_inode == ino) { 246113cd2184SNeilBrown get_nfs4_file(fp); 24628b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24631da177e4SLinus Torvalds return fp; 24641da177e4SLinus Torvalds } 246513cd2184SNeilBrown } 24668b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24671da177e4SLinus Torvalds return NULL; 24681da177e4SLinus Torvalds } 24691da177e4SLinus Torvalds 24704f83aa30SJ. Bruce Fields /* 24711da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 24721da177e4SLinus Torvalds * WRITE with all zero or all one stateid 24731da177e4SLinus Torvalds */ 2474b37ad28bSAl Viro static __be32 24751da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 24761da177e4SLinus Torvalds { 24771da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 24781da177e4SLinus Torvalds struct nfs4_file *fp; 2479dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2480b37ad28bSAl Viro __be32 ret; 24811da177e4SLinus Torvalds 24821da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 24831da177e4SLinus Torvalds 24841da177e4SLinus Torvalds fp = find_file(ino); 248513cd2184SNeilBrown if (!fp) 248613cd2184SNeilBrown return nfs_ok; 2487b700949bSNeilBrown ret = nfserr_locked; 24881da177e4SLinus Torvalds /* Search for conflicting share reservations */ 24898beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 24901da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 24911da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 249213cd2184SNeilBrown goto out; 24931da177e4SLinus Torvalds } 249413cd2184SNeilBrown ret = nfs_ok; 249513cd2184SNeilBrown out: 249613cd2184SNeilBrown put_nfs4_file(fp); 249713cd2184SNeilBrown return ret; 24981da177e4SLinus Torvalds } 24991da177e4SLinus Torvalds 25006b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25011da177e4SLinus Torvalds { 25021da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25031da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25041da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25051da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25061da177e4SLinus Torvalds * it's safe to take a reference: */ 25071da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25081da177e4SLinus Torvalds 25091da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25101da177e4SLinus Torvalds 2511460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25121da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25131da177e4SLinus Torvalds 25146b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25156b57d9c8SJ. Bruce Fields } 25166b57d9c8SJ. Bruce Fields 2517acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25186b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25196b57d9c8SJ. Bruce Fields { 2520acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2521acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25226b57d9c8SJ. Bruce Fields 2523acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2524acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2525acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 25260272e1fdSJ. Bruce Fields /* 25270272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2528acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25296b57d9c8SJ. Bruce Fields * in time: 25300272e1fdSJ. Bruce Fields */ 25310272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25321da177e4SLinus Torvalds 25335d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2534acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2535acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25365d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 25375d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 25381da177e4SLinus Torvalds } 25391da177e4SLinus Torvalds 25401da177e4SLinus Torvalds static 25411da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 25421da177e4SLinus Torvalds { 25431da177e4SLinus Torvalds if (arg & F_UNLCK) 25441da177e4SLinus Torvalds return lease_modify(onlist, arg); 25451da177e4SLinus Torvalds else 25461da177e4SLinus Torvalds return -EAGAIN; 25471da177e4SLinus Torvalds } 25481da177e4SLinus Torvalds 25497b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 25508fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 25518fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 25521da177e4SLinus Torvalds }; 25531da177e4SLinus Torvalds 25547a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 25557a8711c9SJ. Bruce Fields { 25567a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 25577a8711c9SJ. Bruce Fields return nfs_ok; 25587a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 25597a8711c9SJ. Bruce Fields return nfserr_replay_me; 25607a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 25617a8711c9SJ. Bruce Fields return nfs_ok; 25627a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 25637a8711c9SJ. Bruce Fields } 25641da177e4SLinus Torvalds 2565b37ad28bSAl Viro __be32 25666668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 25676668958fSAndy Adamson struct nfsd4_open *open) 25681da177e4SLinus Torvalds { 25691da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 25701da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 25711da177e4SLinus Torvalds unsigned int strhashval; 2572fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 25734cdc951bSJ. Bruce Fields __be32 status; 25741da177e4SLinus Torvalds 25751da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 25761da177e4SLinus Torvalds return nfserr_stale_clientid; 257732513b40SJ. Bruce Fields /* 257832513b40SJ. Bruce Fields * In case we need it later, after we've already created the 257932513b40SJ. Bruce Fields * file and don't want to risk a further failure: 258032513b40SJ. Bruce Fields */ 258132513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 258232513b40SJ. Bruce Fields if (open->op_file == NULL) 258332513b40SJ. Bruce Fields return nfserr_jukebox; 25841da177e4SLinus Torvalds 258516bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2586fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2587fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2588fe0750e5SJ. Bruce Fields if (!oo) { 25890f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 25900f442aa2SJ. Bruce Fields if (clp == NULL) 25910f442aa2SJ. Bruce Fields return nfserr_expired; 2592bcf130f9SJ. Bruce Fields goto new_owner; 25930f442aa2SJ. Bruce Fields } 2594dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 25950f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2596fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2597fe0750e5SJ. Bruce Fields release_openowner(oo); 2598fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2599bcf130f9SJ. Bruce Fields goto new_owner; 26000f442aa2SJ. Bruce Fields } 26014cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26024cdc951bSJ. Bruce Fields if (status) 26034cdc951bSJ. Bruce Fields return status; 26044cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26054cdc951bSJ. Bruce Fields goto alloc_stateid; 2606bcf130f9SJ. Bruce Fields new_owner: 2607fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2608fe0750e5SJ. Bruce Fields if (oo == NULL) 26093e772463SJ. Bruce Fields return nfserr_jukebox; 2610fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26114cdc951bSJ. Bruce Fields alloc_stateid: 26124cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26134cdc951bSJ. Bruce Fields if (!open->op_stp) 26144cdc951bSJ. Bruce Fields return nfserr_jukebox; 26150f442aa2SJ. Bruce Fields return nfs_ok; 26161da177e4SLinus Torvalds } 26171da177e4SLinus Torvalds 2618b37ad28bSAl Viro static inline __be32 26194a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26204a6e43e6SNeilBrown { 26214a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26224a6e43e6SNeilBrown return nfserr_openmode; 26234a6e43e6SNeilBrown else 26244a6e43e6SNeilBrown return nfs_ok; 26254a6e43e6SNeilBrown } 26264a6e43e6SNeilBrown 2627c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 262824a0111eSJ. Bruce Fields { 262924a0111eSJ. Bruce Fields share_access &= ~NFS4_SHARE_WANT_MASK; 263024a0111eSJ. Bruce Fields 263124a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 263224a0111eSJ. Bruce Fields } 263324a0111eSJ. Bruce Fields 263438c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2635f459e453SJ. Bruce Fields { 2636f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2637f459e453SJ. Bruce Fields 263838c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2639f459e453SJ. Bruce Fields if (!ret) 2640f459e453SJ. Bruce Fields return NULL; 2641f459e453SJ. Bruce Fields return delegstateid(ret); 2642f459e453SJ. Bruce Fields } 2643f459e453SJ. Bruce Fields 26448b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26458b289b2cSJ. Bruce Fields { 26468b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 26478b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 26488b289b2cSJ. Bruce Fields } 26498b289b2cSJ. Bruce Fields 2650b37ad28bSAl Viro static __be32 265138c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2652567d9829SNeilBrown struct nfs4_delegation **dp) 2653567d9829SNeilBrown { 2654567d9829SNeilBrown int flags; 2655b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2656567d9829SNeilBrown 265738c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2658567d9829SNeilBrown if (*dp == NULL) 2659c44c5eebSNeilBrown goto out; 266024a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2661567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2662567d9829SNeilBrown if (status) 2663567d9829SNeilBrown *dp = NULL; 2664c44c5eebSNeilBrown out: 26658b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2666c44c5eebSNeilBrown return nfs_ok; 2667c44c5eebSNeilBrown if (status) 2668c44c5eebSNeilBrown return status; 2669dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2670c44c5eebSNeilBrown return nfs_ok; 2671567d9829SNeilBrown } 2672567d9829SNeilBrown 2673b37ad28bSAl Viro static __be32 2674dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 26751da177e4SLinus Torvalds { 2676dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2677fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 26781da177e4SLinus Torvalds 26798beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 26801da177e4SLinus Torvalds /* ignore lock owners */ 26811da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 26821da177e4SLinus Torvalds continue; 26831da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2684fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 26851da177e4SLinus Torvalds *stpp = local; 26861da177e4SLinus Torvalds /* check for conflicting share reservations */ 26871da177e4SLinus Torvalds if (!test_share(local, open)) 268877eaae8dSJ. Bruce Fields return nfserr_share_denied; 26891da177e4SLinus Torvalds } 269077eaae8dSJ. Bruce Fields return nfs_ok; 26911da177e4SLinus Torvalds } 26921da177e4SLinus Torvalds 2693996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2694996e0938SJ. Bruce Fields { 2695996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 26965ac049acSNeilBrown } 26975ac049acSNeilBrown 269821fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 269921fb4016SJ. Bruce Fields { 270021fb4016SJ. Bruce Fields int flags = 0; 270121fb4016SJ. Bruce Fields 270221fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 270321fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 270421fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 270521fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 270621fb4016SJ. Bruce Fields return flags; 270721fb4016SJ. Bruce Fields } 270821fb4016SJ. Bruce Fields 27090c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27100c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2711f9d7562fSJ. Bruce Fields { 2712f9d7562fSJ. Bruce Fields __be32 status; 27130c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27140c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27150c12eaffSCasey Bodley 2716f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2717f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2718f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2719f9d7562fSJ. Bruce Fields if (status) 2720f9d7562fSJ. Bruce Fields return status; 2721f9d7562fSJ. Bruce Fields } 2722f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2723f9d7562fSJ. Bruce Fields 2724f9d7562fSJ. Bruce Fields return nfs_ok; 2725f9d7562fSJ. Bruce Fields } 2726f9d7562fSJ. Bruce Fields 2727b37ad28bSAl Viro static inline __be32 27281da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27291da177e4SLinus Torvalds struct nfsd4_open *open) 27301da177e4SLinus Torvalds { 27311da177e4SLinus Torvalds struct iattr iattr = { 27321da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27331da177e4SLinus Torvalds .ia_size = 0, 27341da177e4SLinus Torvalds }; 27351da177e4SLinus Torvalds if (!open->op_truncate) 27361da177e4SLinus Torvalds return 0; 27371da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27389246585aSAl Viro return nfserr_inval; 27391da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27401da177e4SLinus Torvalds } 27411da177e4SLinus Torvalds 2742b37ad28bSAl Viro static __be32 2743dcef0413SJ. 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) 27441da177e4SLinus Torvalds { 2745b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27467d947842SJ. Bruce Fields bool new_access; 2747b37ad28bSAl Viro __be32 status; 27481da177e4SLinus Torvalds 27497d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2750f9d7562fSJ. Bruce Fields if (new_access) { 27510c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2752f9d7562fSJ. Bruce Fields if (status) 2753f9d7562fSJ. Bruce Fields return status; 27546c26d08fSJ. Bruce Fields } 27551da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 27561da177e4SLinus Torvalds if (status) { 2757f9d7562fSJ. Bruce Fields if (new_access) { 2758f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2759f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2760f9d7562fSJ. Bruce Fields } 27611da177e4SLinus Torvalds return status; 27621da177e4SLinus Torvalds } 27631da177e4SLinus Torvalds /* remember the open */ 276424a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2765b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 27661da177e4SLinus Torvalds 27671da177e4SLinus Torvalds return nfs_ok; 27681da177e4SLinus Torvalds } 27691da177e4SLinus Torvalds 27701da177e4SLinus Torvalds 27711da177e4SLinus Torvalds static void 277237515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 27731da177e4SLinus Torvalds { 2774dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2775fe0750e5SJ. Bruce Fields open->op_openowner->oo_owner.so_client->cl_firststate = 1; 27761da177e4SLinus Torvalds } 27771da177e4SLinus Torvalds 277814a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 277914a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 278014a24e99SJ. Bruce Fields { 278114a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 278214a24e99SJ. Bruce Fields return true; 278314a24e99SJ. Bruce Fields /* 278414a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 278514a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 278614a24e99SJ. Bruce Fields * until we hear otherwise: 278714a24e99SJ. Bruce Fields */ 278814a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 278914a24e99SJ. Bruce Fields } 279014a24e99SJ. Bruce Fields 279122d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 279222d38c4cSJ. Bruce Fields { 279322d38c4cSJ. Bruce Fields struct file_lock *fl; 279422d38c4cSJ. Bruce Fields 279522d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 279622d38c4cSJ. Bruce Fields if (!fl) 279722d38c4cSJ. Bruce Fields return NULL; 279822d38c4cSJ. Bruce Fields locks_init_lock(fl); 279922d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 280022d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 280122d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 280222d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2803acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 280422d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 280522d38c4cSJ. Bruce Fields return fl; 280622d38c4cSJ. Bruce Fields } 280722d38c4cSJ. Bruce Fields 2808edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2809edab9782SJ. Bruce Fields { 2810acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2811edab9782SJ. Bruce Fields struct file_lock *fl; 2812edab9782SJ. Bruce Fields int status; 2813edab9782SJ. Bruce Fields 2814edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2815edab9782SJ. Bruce Fields if (!fl) 2816edab9782SJ. Bruce Fields return -ENOMEM; 2817acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28182a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2819acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2820edab9782SJ. Bruce Fields if (status) { 2821acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2822edab9782SJ. Bruce Fields locks_free_lock(fl); 2823edab9782SJ. Bruce Fields return -ENOMEM; 2824edab9782SJ. Bruce Fields } 2825acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2826acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2827acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2828acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2829acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2830acfdf5c3SJ. Bruce Fields return 0; 2831acfdf5c3SJ. Bruce Fields } 2832acfdf5c3SJ. Bruce Fields 2833acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2834acfdf5c3SJ. Bruce Fields { 2835acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2836acfdf5c3SJ. Bruce Fields 2837acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2838acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2839acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2840acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2841acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2842acfdf5c3SJ. Bruce Fields return -EAGAIN; 2843acfdf5c3SJ. Bruce Fields } 2844acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2845acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2846acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28472a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2848edab9782SJ. Bruce Fields return 0; 2849edab9782SJ. Bruce Fields } 2850edab9782SJ. Bruce Fields 28511da177e4SLinus Torvalds /* 28521da177e4SLinus Torvalds * Attempt to hand out a delegation. 28531da177e4SLinus Torvalds */ 28541da177e4SLinus Torvalds static void 2855dcef0413SJ. Bruce Fields nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 28561da177e4SLinus Torvalds { 28571da177e4SLinus Torvalds struct nfs4_delegation *dp; 2858fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 285914a24e99SJ. Bruce Fields int cb_up; 28601da177e4SLinus Torvalds int status, flag = 0; 28611da177e4SLinus Torvalds 2862fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 28631da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 28647b190fecSNeilBrown open->op_recall = 0; 28657b190fecSNeilBrown switch (open->op_claim_type) { 28667b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 28672bf23875SJ. Bruce Fields if (!cb_up) 28687b190fecSNeilBrown open->op_recall = 1; 28697b190fecSNeilBrown flag = open->op_delegate_type; 28707b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 28711da177e4SLinus Torvalds goto out; 28727b190fecSNeilBrown break; 28737b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 28747b190fecSNeilBrown /* Let's not give out any delegations till everyone's 28757b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2876af558e33SJ. Bruce Fields if (locks_in_grace()) 28777b190fecSNeilBrown goto out; 2878dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 28797b190fecSNeilBrown goto out; 28801da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 28811da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 28821da177e4SLinus Torvalds else 28831da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 28847b190fecSNeilBrown break; 28857b190fecSNeilBrown default: 28867b190fecSNeilBrown goto out; 28877b190fecSNeilBrown } 28881da177e4SLinus Torvalds 2889fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2890dd239cc0SJ. Bruce Fields if (dp == NULL) 2891dd239cc0SJ. Bruce Fields goto out_no_deleg; 2892acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2893edab9782SJ. Bruce Fields if (status) 2894dd239cc0SJ. Bruce Fields goto out_free; 28951da177e4SLinus Torvalds 2896d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 28971da177e4SLinus Torvalds 28988c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2899d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29001da177e4SLinus Torvalds out: 29017b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 29027b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 29037b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 29042fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 29051da177e4SLinus Torvalds open->op_delegate_type = flag; 2906dd239cc0SJ. Bruce Fields return; 2907dd239cc0SJ. Bruce Fields out_free: 2908acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2909dd239cc0SJ. Bruce Fields out_no_deleg: 2910dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2911dd239cc0SJ. Bruce Fields goto out; 29121da177e4SLinus Torvalds } 29131da177e4SLinus Torvalds 29141da177e4SLinus Torvalds /* 29151da177e4SLinus Torvalds * called with nfs4_lock_state() held. 29161da177e4SLinus Torvalds */ 2917b37ad28bSAl Viro __be32 29181da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 29191da177e4SLinus Torvalds { 29206668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 292138c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 29221da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 29231da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2924dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 2925567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2926b37ad28bSAl Viro __be32 status; 29271da177e4SLinus Torvalds 29281da177e4SLinus Torvalds /* 29291da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 29301da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 29311da177e4SLinus Torvalds * If not found, create the nfs4_file struct 29321da177e4SLinus Torvalds */ 29331da177e4SLinus Torvalds fp = find_file(ino); 29341da177e4SLinus Torvalds if (fp) { 29351da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 29361da177e4SLinus Torvalds goto out; 293738c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 2938c44c5eebSNeilBrown if (status) 2939c44c5eebSNeilBrown goto out; 29401da177e4SLinus Torvalds } else { 2941c44c5eebSNeilBrown status = nfserr_bad_stateid; 29428b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 2943c44c5eebSNeilBrown goto out; 29443e772463SJ. Bruce Fields status = nfserr_jukebox; 294532513b40SJ. Bruce Fields fp = open->op_file; 294632513b40SJ. Bruce Fields open->op_file = NULL; 294732513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 29481da177e4SLinus Torvalds } 29491da177e4SLinus Torvalds 29501da177e4SLinus Torvalds /* 29511da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 29521da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 29531da177e4SLinus Torvalds */ 29541da177e4SLinus Torvalds if (stp) { 29551da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 2956f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 29571da177e4SLinus Torvalds if (status) 29581da177e4SLinus Torvalds goto out; 29591da177e4SLinus Torvalds } else { 29604cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 2961567d9829SNeilBrown if (status) 29621da177e4SLinus Torvalds goto out; 29634cdc951bSJ. Bruce Fields stp = open->op_stp; 29644cdc951bSJ. Bruce Fields open->op_stp = NULL; 2965996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 29661da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 29671da177e4SLinus Torvalds if (status) { 29682283963fSJ. Bruce Fields release_open_stateid(stp); 29691da177e4SLinus Torvalds goto out; 29701da177e4SLinus Torvalds } 29711da177e4SLinus Torvalds } 2972dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 2973dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 29741da177e4SLinus Torvalds 29754dc6ec00SJ. Bruce Fields if (nfsd4_has_session(&resp->cstate)) 2976dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 29776668958fSAndy Adamson 29781da177e4SLinus Torvalds /* 29791da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 29801da177e4SLinus Torvalds * OPEN succeeds even if we fail. 29811da177e4SLinus Torvalds */ 29821da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 29831da177e4SLinus Torvalds 29841da177e4SLinus Torvalds status = nfs_ok; 29851da177e4SLinus Torvalds 29868c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 2987dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 29881da177e4SLinus Torvalds out: 298913cd2184SNeilBrown if (fp) 299013cd2184SNeilBrown put_nfs4_file(fp); 299137515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 299237515177SNeilBrown nfs4_set_claim_prev(open); 29931da177e4SLinus Torvalds /* 29941da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 29951da177e4SLinus Torvalds */ 29961da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 2997dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 29986668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 29991da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 30001da177e4SLinus Torvalds 30011da177e4SLinus Torvalds return status; 30021da177e4SLinus Torvalds } 30031da177e4SLinus Torvalds 3004d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3005d29b20cdSJ. Bruce Fields { 3006d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3007d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3008d29b20cdSJ. Bruce Fields 3009d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3010d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3011d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3012d29b20cdSJ. Bruce Fields if (status) { 3013d29b20cdSJ. Bruce Fields release_openowner(oo); 3014d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3015d29b20cdSJ. Bruce Fields } else 3016d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3017d29b20cdSJ. Bruce Fields } 3018d29b20cdSJ. Bruce Fields } 301932513b40SJ. Bruce Fields if (open->op_file) 302032513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 30214cdc951bSJ. Bruce Fields if (open->op_stp) 30224cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3023d29b20cdSJ. Bruce Fields } 3024d29b20cdSJ. Bruce Fields 3025b37ad28bSAl Viro __be32 3026b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3027b591480bSJ.Bruce Fields clientid_t *clid) 30281da177e4SLinus Torvalds { 30291da177e4SLinus Torvalds struct nfs4_client *clp; 3030b37ad28bSAl Viro __be32 status; 30311da177e4SLinus Torvalds 30321da177e4SLinus Torvalds nfs4_lock_state(); 30331da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 30341da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 30351da177e4SLinus Torvalds status = nfserr_stale_clientid; 30361da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 30371da177e4SLinus Torvalds goto out; 30381da177e4SLinus Torvalds clp = find_confirmed_client(clid); 30391da177e4SLinus Torvalds status = nfserr_expired; 30401da177e4SLinus Torvalds if (clp == NULL) { 30411da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 30421da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 30431da177e4SLinus Torvalds goto out; 30441da177e4SLinus Torvalds } 30451da177e4SLinus Torvalds status = nfserr_cb_path_down; 3046ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 304777a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 30481da177e4SLinus Torvalds goto out; 30491da177e4SLinus Torvalds status = nfs_ok; 30501da177e4SLinus Torvalds out: 30511da177e4SLinus Torvalds nfs4_unlock_state(); 30521da177e4SLinus Torvalds return status; 30531da177e4SLinus Torvalds } 30541da177e4SLinus Torvalds 3055c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 3056af558e33SJ. Bruce Fields }; 3057af558e33SJ. Bruce Fields 3058a76b4319SNeilBrown static void 3059af558e33SJ. Bruce Fields nfsd4_end_grace(void) 3060a76b4319SNeilBrown { 3061a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 3062c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 3063af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 3064e46b498cSJ. Bruce Fields /* 3065e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3066e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3067e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3068e46b498cSJ. Bruce Fields */ 3069e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3070a76b4319SNeilBrown } 3071a76b4319SNeilBrown 3072fd39ca9aSNeilBrown static time_t 30731da177e4SLinus Torvalds nfs4_laundromat(void) 30741da177e4SLinus Torvalds { 30751da177e4SLinus Torvalds struct nfs4_client *clp; 3076fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 30771da177e4SLinus Torvalds struct nfs4_delegation *dp; 30781da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3079cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3080cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3081cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 30821da177e4SLinus Torvalds 30831da177e4SLinus Torvalds nfs4_lock_state(); 30841da177e4SLinus Torvalds 30851da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3086af558e33SJ. Bruce Fields if (locks_in_grace()) 3087af558e33SJ. Bruce Fields nfsd4_end_grace(); 308836acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 308936acb66bSBenny Halevy spin_lock(&client_lock); 30901da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 30911da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 30921da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 30931da177e4SLinus Torvalds t = clp->cl_time - cutoff; 30941da177e4SLinus Torvalds if (clientid_val > t) 30951da177e4SLinus Torvalds clientid_val = t; 30961da177e4SLinus Torvalds break; 30971da177e4SLinus Torvalds } 3098d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3099d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3100d7682988SBenny Halevy clp->cl_clientid.cl_id); 3101d7682988SBenny Halevy continue; 3102d7682988SBenny Halevy } 3103d7682988SBenny Halevy unhash_client_locked(clp); 3104d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 310536acb66bSBenny Halevy } 310636acb66bSBenny Halevy spin_unlock(&client_lock); 310736acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 310836acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 31091da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 31101da177e4SLinus Torvalds clp->cl_clientid.cl_id); 3111c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 31121da177e4SLinus Torvalds expire_client(clp); 31131da177e4SLinus Torvalds } 31141da177e4SLinus Torvalds spin_lock(&recall_lock); 31151da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 31161da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 31171da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 31181da177e4SLinus Torvalds u = dp->dl_time - cutoff; 31191da177e4SLinus Torvalds if (test_val > u) 31201da177e4SLinus Torvalds test_val = u; 31211da177e4SLinus Torvalds break; 31221da177e4SLinus Torvalds } 31231da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 31241da177e4SLinus Torvalds } 31251da177e4SLinus Torvalds spin_unlock(&recall_lock); 31261da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 31271da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 31281da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 31291da177e4SLinus Torvalds unhash_delegation(dp); 31301da177e4SLinus Torvalds } 3131cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 31321da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3133fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3134fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3135fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 31361da177e4SLinus Torvalds if (test_val > u) 31371da177e4SLinus Torvalds test_val = u; 31381da177e4SLinus Torvalds break; 31391da177e4SLinus Torvalds } 3140fe0750e5SJ. Bruce Fields release_openowner(oo); 31411da177e4SLinus Torvalds } 31421da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 31431da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 31441da177e4SLinus Torvalds nfs4_unlock_state(); 31451da177e4SLinus Torvalds return clientid_val; 31461da177e4SLinus Torvalds } 31471da177e4SLinus Torvalds 3148a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3149a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3150a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3151a254b246SHarvey Harrison 3152a254b246SHarvey Harrison static void 3153c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 31541da177e4SLinus Torvalds { 31551da177e4SLinus Torvalds time_t t; 31561da177e4SLinus Torvalds 31571da177e4SLinus Torvalds t = nfs4_laundromat(); 31581da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 315958da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 31601da177e4SLinus Torvalds } 31611da177e4SLinus Torvalds 3162f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3163f8816512SNeilBrown { 3164f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3165f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3166f7a4d872SJ. Bruce Fields return nfs_ok; 31671da177e4SLinus Torvalds } 31681da177e4SLinus Torvalds 31691da177e4SLinus Torvalds static int 31701da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 31711da177e4SLinus Torvalds { 3172d3b313a4SJ. Bruce Fields if (stateid->si_opaque.so_clid.cl_boot == boot_time) 3173e4e83ea4SJ. Bruce Fields return 0; 31748c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 31758c10cbdbSBenny Halevy STATEID_VAL(stateid)); 31761da177e4SLinus Torvalds return 1; 31771da177e4SLinus Torvalds } 31781da177e4SLinus Torvalds 31791da177e4SLinus Torvalds static inline int 31801da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 31811da177e4SLinus Torvalds { 31821da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 31831da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 31841da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 31851da177e4SLinus Torvalds } 31861da177e4SLinus Torvalds 31871da177e4SLinus Torvalds static inline int 31881da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 31891da177e4SLinus Torvalds { 31901da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 31911da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 31921da177e4SLinus Torvalds } 31931da177e4SLinus Torvalds 31941da177e4SLinus Torvalds static 3195dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 31961da177e4SLinus Torvalds { 3197b37ad28bSAl Viro __be32 status = nfserr_openmode; 31981da177e4SLinus Torvalds 319902921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 320002921914SJ. Bruce Fields if (stp->st_openstp) 320102921914SJ. Bruce Fields stp = stp->st_openstp; 32021da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 32031da177e4SLinus Torvalds goto out; 32041da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 32051da177e4SLinus Torvalds goto out; 32061da177e4SLinus Torvalds status = nfs_ok; 32071da177e4SLinus Torvalds out: 32081da177e4SLinus Torvalds return status; 32091da177e4SLinus Torvalds } 32101da177e4SLinus Torvalds 3211b37ad28bSAl Viro static inline __be32 32121da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 32131da177e4SLinus Torvalds { 3214203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 32151da177e4SLinus Torvalds return nfs_ok; 3216af558e33SJ. Bruce Fields else if (locks_in_grace()) { 321725985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 32181da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 32191da177e4SLinus Torvalds return nfserr_grace; 32201da177e4SLinus Torvalds } else if (flags & WR_STATE) 32211da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32221da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 32231da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 32241da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32251da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 32261da177e4SLinus Torvalds } 32271da177e4SLinus Torvalds 32281da177e4SLinus Torvalds /* 32291da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 32301da177e4SLinus Torvalds * that are not able to provide mandatory locking. 32311da177e4SLinus Torvalds */ 32321da177e4SLinus Torvalds static inline int 323318f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 32341da177e4SLinus Torvalds { 3235203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 32361da177e4SLinus Torvalds } 32371da177e4SLinus Torvalds 323881b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 323981b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 324081b82965SJ. Bruce Fields { 324181b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 324281b82965SJ. Bruce Fields } 324381b82965SJ. Bruce Fields 324428dde241SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 32450836f587SJ. Bruce Fields { 32466668958fSAndy Adamson /* 32476668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 32486668958fSAndy Adamson * when it is zero. 32496668958fSAndy Adamson */ 325028dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 325181b82965SJ. Bruce Fields return nfs_ok; 325281b82965SJ. Bruce Fields 325381b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 325481b82965SJ. Bruce Fields return nfs_ok; 32556668958fSAndy Adamson 32560836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 325781b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 32580836f587SJ. Bruce Fields return nfserr_bad_stateid; 32590836f587SJ. Bruce Fields /* 326081b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 326181b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 326281b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 326381b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 326481b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 326581b82965SJ. Bruce Fields * but better performance may result in retrying IO that 326681b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 326781b82965SJ. Bruce Fields * reordered in flight: 32680836f587SJ. Bruce Fields */ 32690836f587SJ. Bruce Fields return nfserr_old_stateid; 32700836f587SJ. Bruce Fields } 32710836f587SJ. Bruce Fields 327238c2f4b1SJ. Bruce Fields __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 327317456804SBryan Schumaker { 327497b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 327597b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 327697b7e3b6SJ. Bruce Fields __be32 status; 327717456804SBryan Schumaker 327817456804SBryan Schumaker if (STALE_STATEID(stateid)) 327997b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 328017456804SBryan Schumaker 328138c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 328297b7e3b6SJ. Bruce Fields if (!s) 328397b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 328436279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 328517456804SBryan Schumaker if (status) 328617456804SBryan Schumaker return status; 328797b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 328897b7e3b6SJ. Bruce Fields return nfs_ok; 328997b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 329097b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3291dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 329297b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 329397b7e3b6SJ. Bruce Fields return nfs_ok; 329417456804SBryan Schumaker } 329517456804SBryan Schumaker 329638c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 329738c2f4b1SJ. Bruce Fields { 329838c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 329938c2f4b1SJ. Bruce Fields 330038c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 330138c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 330238c2f4b1SJ. Bruce Fields if (STALE_STATEID(stateid)) 330338c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 330438c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 330538c2f4b1SJ. Bruce Fields if (!cl) 330638c2f4b1SJ. Bruce Fields return nfserr_expired; 330738c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 330838c2f4b1SJ. Bruce Fields if (!*s) 330938c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 331038c2f4b1SJ. Bruce Fields return nfs_ok; 331138c2f4b1SJ. Bruce Fields 331238c2f4b1SJ. Bruce Fields } 331338c2f4b1SJ. Bruce Fields 33141da177e4SLinus Torvalds /* 33151da177e4SLinus Torvalds * Checks for stateid operations 33161da177e4SLinus Torvalds */ 3317b37ad28bSAl Viro __be32 3318dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3319dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 33201da177e4SLinus Torvalds { 332169064a27SJ. Bruce Fields struct nfs4_stid *s; 3322dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 33231da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3324dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 33251da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3326b37ad28bSAl Viro __be32 status; 33271da177e4SLinus Torvalds 33281da177e4SLinus Torvalds if (filpp) 33291da177e4SLinus Torvalds *filpp = NULL; 33301da177e4SLinus Torvalds 333118f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 33321da177e4SLinus Torvalds return nfserr_grace; 33331da177e4SLinus Torvalds 33341da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 33351da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 33361da177e4SLinus Torvalds 333738c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 333838c2f4b1SJ. Bruce Fields if (status) 333938c2f4b1SJ. Bruce Fields return status; 334069064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 33410c2a498fSJ. Bruce Fields if (status) 33420c2a498fSJ. Bruce Fields goto out; 3343f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3344f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 334569064a27SJ. Bruce Fields dp = delegstateid(s); 3346dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3347dc9bf700SJ. Bruce Fields if (status) 3348dc9bf700SJ. Bruce Fields goto out; 334943b0178eSDan Carpenter if (filpp) { 3350acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3351f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 335243b0178eSDan Carpenter } 3353f7a4d872SJ. Bruce Fields break; 3354f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3355f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 335669064a27SJ. Bruce Fields stp = openlockstateid(s); 3357f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3358f7a4d872SJ. Bruce Fields if (status) 33591da177e4SLinus Torvalds goto out; 3360fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3361dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 33621da177e4SLinus Torvalds goto out; 3363a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3364a4455be0SJ. Bruce Fields if (status) 33651da177e4SLinus Torvalds goto out; 3366f9d7562fSJ. Bruce Fields if (filpp) { 3367f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3368f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3369f9d7562fSJ. Bruce Fields else 3370f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3371f9d7562fSJ. Bruce Fields } 3372f7a4d872SJ. Bruce Fields break; 3373f7a4d872SJ. Bruce Fields default: 3374f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 33751da177e4SLinus Torvalds } 33761da177e4SLinus Torvalds status = nfs_ok; 33771da177e4SLinus Torvalds out: 33781da177e4SLinus Torvalds return status; 33791da177e4SLinus Torvalds } 33801da177e4SLinus Torvalds 3381e1ca12dfSBryan Schumaker static __be32 3382dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3383e1ca12dfSBryan Schumaker { 3384fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3385e1ca12dfSBryan Schumaker return nfserr_locks_held; 3386e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3387e1ca12dfSBryan Schumaker return nfs_ok; 3388e1ca12dfSBryan Schumaker } 3389e1ca12dfSBryan Schumaker 3390e1ca12dfSBryan Schumaker /* 339117456804SBryan Schumaker * Test if the stateid is valid 339217456804SBryan Schumaker */ 339317456804SBryan Schumaker __be32 339417456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 339517456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 339617456804SBryan Schumaker { 339736279ac1SJ. Bruce Fields /* real work is done during encoding */ 339817456804SBryan Schumaker return nfs_ok; 339917456804SBryan Schumaker } 340017456804SBryan Schumaker 3401e1ca12dfSBryan Schumaker __be32 3402e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3403e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3404e1ca12dfSBryan Schumaker { 3405e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 34062da1cec7SJ. Bruce Fields struct nfs4_stid *s; 340738c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 34082da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3409e1ca12dfSBryan Schumaker 3410e1ca12dfSBryan Schumaker nfs4_lock_state(); 341138c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 34122da1cec7SJ. Bruce Fields if (!s) 3413e1ca12dfSBryan Schumaker goto out; 34142da1cec7SJ. Bruce Fields switch (s->sc_type) { 34152da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3416e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3417e1ca12dfSBryan Schumaker goto out; 34182da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 34192da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 34202da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 34212da1cec7SJ. Bruce Fields if (ret) 3422e1ca12dfSBryan Schumaker goto out; 34232da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 34242da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 34252da1cec7SJ. Bruce Fields else 34262da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3427f7a4d872SJ. Bruce Fields break; 3428f7a4d872SJ. Bruce Fields default: 3429f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3430e1ca12dfSBryan Schumaker } 3431e1ca12dfSBryan Schumaker out: 3432e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3433e1ca12dfSBryan Schumaker return ret; 3434e1ca12dfSBryan Schumaker } 3435e1ca12dfSBryan Schumaker 34364c4cd222SNeilBrown static inline int 34374c4cd222SNeilBrown setlkflg (int type) 34384c4cd222SNeilBrown { 34394c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 34404c4cd222SNeilBrown RD_STATE : WR_STATE; 34414c4cd222SNeilBrown } 34421da177e4SLinus Torvalds 3443dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3444c0a5d93eSJ. Bruce Fields { 3445c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3446c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3447c0a5d93eSJ. Bruce Fields __be32 status; 3448c0a5d93eSJ. Bruce Fields 3449c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3450c0a5d93eSJ. Bruce Fields if (status) 3451c0a5d93eSJ. Bruce Fields return status; 3452f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3453f7a4d872SJ. Bruce Fields /* 3454f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3455f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3456f7a4d872SJ. Bruce Fields */ 3457f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3458f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3459f7a4d872SJ. Bruce Fields if (status) 3460f7a4d872SJ. Bruce Fields return status; 3461f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3462c0a5d93eSJ. Bruce Fields } 3463c0a5d93eSJ. Bruce Fields 34641da177e4SLinus Torvalds /* 34651da177e4SLinus Torvalds * Checks for sequence id mutating operations. 34661da177e4SLinus Torvalds */ 3467b37ad28bSAl Viro static __be32 3468dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 34692288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3470dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 34711da177e4SLinus Torvalds { 34720836f587SJ. Bruce Fields __be32 status; 347338c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 34741da177e4SLinus Torvalds 34758c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 34768c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 34771da177e4SLinus Torvalds 34781da177e4SLinus Torvalds *stpp = NULL; 347938c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3480c0a5d93eSJ. Bruce Fields if (status) 3481c0a5d93eSJ. Bruce Fields return status; 348238c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3483c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 34841da177e4SLinus Torvalds 3485c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 34861da177e4SLinus Torvalds } 34871da177e4SLinus Torvalds 3488dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3489c0a5d93eSJ. Bruce Fields { 3490c0a5d93eSJ. Bruce Fields __be32 status; 3491c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 34921da177e4SLinus Torvalds 3493c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 34942288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 34950836f587SJ. Bruce Fields if (status) 34960836f587SJ. Bruce Fields return status; 3497c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3498dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3499c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 35003a4f98bbSNeilBrown return nfs_ok; 35011da177e4SLinus Torvalds } 35021da177e4SLinus Torvalds 3503b37ad28bSAl Viro __be32 3504ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3505a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 35061da177e4SLinus Torvalds { 3507b37ad28bSAl Viro __be32 status; 3508fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3509dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 35101da177e4SLinus Torvalds 35111da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3512ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3513ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 35141da177e4SLinus Torvalds 3515ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3516a8cddc5dSJ. Bruce Fields if (status) 3517a8cddc5dSJ. Bruce Fields return status; 35181da177e4SLinus Torvalds 35191da177e4SLinus Torvalds nfs4_lock_state(); 35201da177e4SLinus Torvalds 35219072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3522ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 35232288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 35249072d5c6SJ. Bruce Fields if (status) 35251da177e4SLinus Torvalds goto out; 3526fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 352768b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3528dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 352968b66e82SJ. Bruce Fields goto out; 3530dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3531dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3532dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 35338c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3534dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3535c7b9a459SNeilBrown 3536fe0750e5SJ. Bruce Fields nfsd4_create_clid_dir(oo->oo_owner.so_client); 353768b66e82SJ. Bruce Fields status = nfs_ok; 35381da177e4SLinus Torvalds out: 35395ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 35401da177e4SLinus Torvalds nfs4_unlock_state(); 35411da177e4SLinus Torvalds return status; 35421da177e4SLinus Torvalds } 35431da177e4SLinus Torvalds 35446409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 35451da177e4SLinus Torvalds { 35466409a5a6SJ. Bruce Fields if (!test_bit(access, &stp->st_access_bmap)) 35476409a5a6SJ. Bruce Fields return; 35486409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 35496409a5a6SJ. Bruce Fields __clear_bit(access, &stp->st_access_bmap); 3550f197c271SJ. Bruce Fields } 35516409a5a6SJ. Bruce Fields 35526409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 35536409a5a6SJ. Bruce Fields { 35546409a5a6SJ. Bruce Fields switch (to_access) { 35556409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 35566409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 35576409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 35586409a5a6SJ. Bruce Fields break; 35596409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 35606409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 35616409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 35626409a5a6SJ. Bruce Fields break; 35636409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 35646409a5a6SJ. Bruce Fields break; 35656409a5a6SJ. Bruce Fields default: 35666409a5a6SJ. Bruce Fields BUG(); 35671da177e4SLinus Torvalds } 35681da177e4SLinus Torvalds } 35691da177e4SLinus Torvalds 35701da177e4SLinus Torvalds static void 35711da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 35721da177e4SLinus Torvalds { 35731da177e4SLinus Torvalds int i; 35741da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 35751da177e4SLinus Torvalds if ((i & deny) != i) 35761da177e4SLinus Torvalds __clear_bit(i, bmap); 35771da177e4SLinus Torvalds } 35781da177e4SLinus Torvalds } 35791da177e4SLinus Torvalds 3580b37ad28bSAl Viro __be32 3581ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3582ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3583a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 35841da177e4SLinus Torvalds { 3585b37ad28bSAl Viro __be32 status; 3586dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 35871da177e4SLinus Torvalds 35881da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3589ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3590ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 35911da177e4SLinus Torvalds 3592c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 3593c30e92dfSJ. Bruce Fields od->od_share_access &= NFS4_SHARE_ACCESS_MASK; 35941da177e4SLinus Torvalds 35951da177e4SLinus Torvalds nfs4_lock_state(); 3596c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3597c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 35989072d5c6SJ. Bruce Fields if (status) 35991da177e4SLinus Torvalds goto out; 36001da177e4SLinus Torvalds status = nfserr_inval; 36011da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 36021da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 36031da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 36041da177e4SLinus Torvalds goto out; 36051da177e4SLinus Torvalds } 36061da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 36071da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 36081da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 36091da177e4SLinus Torvalds goto out; 36101da177e4SLinus Torvalds } 36116409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 36121da177e4SLinus Torvalds 36131da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 36141da177e4SLinus Torvalds 3615dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3616dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36171da177e4SLinus Torvalds status = nfs_ok; 36181da177e4SLinus Torvalds out: 36195ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36201da177e4SLinus Torvalds nfs4_unlock_state(); 36211da177e4SLinus Torvalds return status; 36221da177e4SLinus Torvalds } 36231da177e4SLinus Torvalds 362438c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 362538c387b5SJ. Bruce Fields { 362638c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 362738c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 362838c387b5SJ. Bruce Fields 362938c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 363038c387b5SJ. Bruce Fields return; 363138c387b5SJ. Bruce Fields oo = openowner(so); 363238c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 363338c387b5SJ. Bruce Fields if (!s) 363438c387b5SJ. Bruce Fields return; 363538c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 363638c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 363738c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 363838c387b5SJ. Bruce Fields return; 363938c387b5SJ. Bruce Fields } 364038c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3641f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3642f7a4d872SJ. Bruce Fields } 3643f7a4d872SJ. Bruce Fields 3644f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3645f7a4d872SJ. Bruce Fields { 3646f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3647f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 364838c387b5SJ. Bruce Fields } 364938c387b5SJ. Bruce Fields 36501da177e4SLinus Torvalds /* 36511da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 36521da177e4SLinus Torvalds */ 3653b37ad28bSAl Viro __be32 3654ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3655a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 36561da177e4SLinus Torvalds { 3657b37ad28bSAl Viro __be32 status; 3658fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3659dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36601da177e4SLinus Torvalds 36611da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3662ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3663ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36641da177e4SLinus Torvalds 36651da177e4SLinus Torvalds nfs4_lock_state(); 3666f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3667f7a4d872SJ. Bruce Fields &close->cl_stateid, 3668f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3669f7a4d872SJ. Bruce Fields &stp); 36709072d5c6SJ. Bruce Fields if (status) 36711da177e4SLinus Torvalds goto out; 3672fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 36731da177e4SLinus Torvalds status = nfs_ok; 3674dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3675dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36761da177e4SLinus Torvalds 3677f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 367838c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 367904ef5954SJ. Bruce Fields 368004ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 368104ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 368204ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 368304ef5954SJ. Bruce Fields */ 3684fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3685fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 36861da177e4SLinus Torvalds out: 36875ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36881da177e4SLinus Torvalds nfs4_unlock_state(); 36891da177e4SLinus Torvalds return status; 36901da177e4SLinus Torvalds } 36911da177e4SLinus Torvalds 3692b37ad28bSAl Viro __be32 3693ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3694ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 36951da177e4SLinus Torvalds { 3696203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3697203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 369838c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3699203a8c8eSJ. Bruce Fields struct inode *inode; 3700b37ad28bSAl Viro __be32 status; 37011da177e4SLinus Torvalds 3702ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3703203a8c8eSJ. Bruce Fields return status; 3704203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 37051da177e4SLinus Torvalds 37061da177e4SLinus Torvalds nfs4_lock_state(); 370738c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 370838c2f4b1SJ. Bruce Fields if (status) 3709203a8c8eSJ. Bruce Fields goto out; 371038c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3711d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3712203a8c8eSJ. Bruce Fields if (status) 3713203a8c8eSJ. Bruce Fields goto out; 3714203a8c8eSJ. Bruce Fields 3715203a8c8eSJ. Bruce Fields unhash_delegation(dp); 37161da177e4SLinus Torvalds out: 3717203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3718203a8c8eSJ. Bruce Fields 37191da177e4SLinus Torvalds return status; 37201da177e4SLinus Torvalds } 37211da177e4SLinus Torvalds 37221da177e4SLinus Torvalds 37231da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 37241da177e4SLinus Torvalds 372587df4de8SBenny Halevy static inline u64 372687df4de8SBenny Halevy end_offset(u64 start, u64 len) 372787df4de8SBenny Halevy { 372887df4de8SBenny Halevy u64 end; 372987df4de8SBenny Halevy 373087df4de8SBenny Halevy end = start + len; 373187df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 373287df4de8SBenny Halevy } 373387df4de8SBenny Halevy 373487df4de8SBenny Halevy /* last octet in a range */ 373587df4de8SBenny Halevy static inline u64 373687df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 373787df4de8SBenny Halevy { 373887df4de8SBenny Halevy u64 end; 373987df4de8SBenny Halevy 374087df4de8SBenny Halevy BUG_ON(!len); 374187df4de8SBenny Halevy end = start + len; 374287df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 374387df4de8SBenny Halevy } 374487df4de8SBenny Halevy 37451da177e4SLinus Torvalds /* 37461da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 37471da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 37481da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 37491da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 37501da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 37511da177e4SLinus Torvalds * the VFS, but this is a very deep change! 37521da177e4SLinus Torvalds */ 37531da177e4SLinus Torvalds static inline void 37541da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 37551da177e4SLinus Torvalds { 37561da177e4SLinus Torvalds if (lock->fl_start < 0) 37571da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 37581da177e4SLinus Torvalds if (lock->fl_end < 0) 37591da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 37601da177e4SLinus Torvalds } 37611da177e4SLinus Torvalds 3762d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3763d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 37647b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3765d5b9026aSNeilBrown }; 37661da177e4SLinus Torvalds 37671da177e4SLinus Torvalds static inline void 37681da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 37691da177e4SLinus Torvalds { 3770fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 37711da177e4SLinus Torvalds 3772d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3773fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3774fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3775fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 37767c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 37777c13f344SJ. Bruce Fields /* We just don't care that much */ 37787c13f344SJ. Bruce Fields goto nevermind; 3779fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3780fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3781d5b9026aSNeilBrown } else { 37827c13f344SJ. Bruce Fields nevermind: 37837c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 37847c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3785d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3786d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 37871da177e4SLinus Torvalds } 37881da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 378987df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 379087df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 37911da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 37921da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 37931da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 37941da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 37951da177e4SLinus Torvalds } 37961da177e4SLinus Torvalds 3797b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3798b93d87c1SJ. Bruce Fields { 3799b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3800b93d87c1SJ. Bruce Fields 3801b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3802b93d87c1SJ. Bruce Fields return false; 3803b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3804b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3805b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3806b93d87c1SJ. Bruce Fields } 3807b93d87c1SJ. Bruce Fields 3808fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3809fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 38101da177e4SLinus Torvalds struct xdr_netobj *owner) 38111da177e4SLinus Torvalds { 381216bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 3813b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 38141da177e4SLinus Torvalds struct nfs4_stateowner *op; 38151da177e4SLinus Torvalds 381616bfdaafSJ. Bruce Fields list_for_each_entry(op, &ownerstr_hashtbl[hashval], so_strhash) { 381716bfdaafSJ. Bruce Fields if (op->so_is_open_owner) 381816bfdaafSJ. Bruce Fields continue; 3819b93d87c1SJ. Bruce Fields lo = lockowner(op); 3820b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3821b93d87c1SJ. Bruce Fields return lo; 38221da177e4SLinus Torvalds } 38231da177e4SLinus Torvalds return NULL; 38241da177e4SLinus Torvalds } 38251da177e4SLinus Torvalds 3826dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3827ff194bd9SJ. Bruce Fields { 382816bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3829fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3830ff194bd9SJ. Bruce Fields } 3831ff194bd9SJ. Bruce Fields 38321da177e4SLinus Torvalds /* 38331da177e4SLinus Torvalds * Alloc a lock owner structure. 38341da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 383525985edcSLucas De Marchi * occurred. 38361da177e4SLinus Torvalds * 383716bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 38381da177e4SLinus Torvalds */ 38391da177e4SLinus Torvalds 3840fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3841dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3842fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 38431da177e4SLinus Torvalds 3844fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3845fe0750e5SJ. Bruce Fields if (!lo) 38461da177e4SLinus Torvalds return NULL; 3847fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3848fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3849b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3850b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3851fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3852fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3853fe0750e5SJ. Bruce Fields return lo; 38541da177e4SLinus Torvalds } 38551da177e4SLinus Torvalds 3856dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3857dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 38581da177e4SLinus Torvalds { 3859dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 3860d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 38611da177e4SLinus Torvalds 3862996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 38635ac049acSNeilBrown if (stp == NULL) 38646136d2b4SJ. Bruce Fields return NULL; 3865996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 38668beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3867fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3868fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 386913cd2184SNeilBrown get_nfs4_file(fp); 38701da177e4SLinus Torvalds stp->st_file = fp; 38710997b173SJ. Bruce Fields stp->st_access_bmap = 0; 38721da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 38734c4cd222SNeilBrown stp->st_openstp = open_stp; 38741da177e4SLinus Torvalds return stp; 38751da177e4SLinus Torvalds } 38761da177e4SLinus Torvalds 3877fd39ca9aSNeilBrown static int 38781da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 38791da177e4SLinus Torvalds { 388087df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 38811da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 38821da177e4SLinus Torvalds } 38831da177e4SLinus Torvalds 3884dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 38850997b173SJ. Bruce Fields { 38860997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 38870997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 38880997b173SJ. Bruce Fields 38890997b173SJ. Bruce Fields if (test_bit(access, &lock_stp->st_access_bmap)) 38900997b173SJ. Bruce Fields return; 38910997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 38920997b173SJ. Bruce Fields __set_bit(access, &lock_stp->st_access_bmap); 38930997b173SJ. Bruce Fields } 38940997b173SJ. Bruce Fields 389564a284d0SJ. Bruce Fields __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) 389664a284d0SJ. Bruce Fields { 389764a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 389864a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 389964a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 390064a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 390164a284d0SJ. Bruce Fields unsigned int strhashval; 390264a284d0SJ. Bruce Fields 390364a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 390464a284d0SJ. Bruce Fields if (lo) { 390564a284d0SJ. Bruce Fields if (!cstate->minorversion) 390664a284d0SJ. Bruce Fields return nfserr_bad_seqid; 390764a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 390864a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 390964a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 391064a284d0SJ. Bruce Fields return nfs_ok; 391164a284d0SJ. Bruce Fields } 391216bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 391364a284d0SJ. Bruce Fields &lock->v.new.owner); 391464a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 391564a284d0SJ. Bruce Fields if (lo == NULL) 391664a284d0SJ. Bruce Fields return nfserr_jukebox; 391764a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 391864a284d0SJ. Bruce Fields if (*lst == NULL) { 391964a284d0SJ. Bruce Fields release_lockowner(lo); 392064a284d0SJ. Bruce Fields return nfserr_jukebox; 392164a284d0SJ. Bruce Fields } 392264a284d0SJ. Bruce Fields *new = true; 392364a284d0SJ. Bruce Fields return nfs_ok; 392464a284d0SJ. Bruce Fields } 392564a284d0SJ. Bruce Fields 39261da177e4SLinus Torvalds /* 39271da177e4SLinus Torvalds * LOCK operation 39281da177e4SLinus Torvalds */ 3929b37ad28bSAl Viro __be32 3930ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3931a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 39321da177e4SLinus Torvalds { 3933fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 3934fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 3935dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 39367d947842SJ. Bruce Fields struct nfs4_file *fp; 39377d947842SJ. Bruce Fields struct file *filp = NULL; 39381da177e4SLinus Torvalds struct file_lock file_lock; 39398dc7c311SAndy Adamson struct file_lock conflock; 3940b37ad28bSAl Viro __be32 status = 0; 394164a284d0SJ. Bruce Fields bool new_state = false; 3942b34f27aaSJ. Bruce Fields int lkflg; 3943b8dd7b9aSAl Viro int err; 39441da177e4SLinus Torvalds 39451da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 39461da177e4SLinus Torvalds (long long) lock->lk_offset, 39471da177e4SLinus Torvalds (long long) lock->lk_length); 39481da177e4SLinus Torvalds 39491da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 39501da177e4SLinus Torvalds return nfserr_inval; 39511da177e4SLinus Torvalds 3952ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 39538837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3954a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3955a6f6ef2fSAndy Adamson return status; 3956a6f6ef2fSAndy Adamson } 3957a6f6ef2fSAndy Adamson 39581da177e4SLinus Torvalds nfs4_lock_state(); 39591da177e4SLinus Torvalds 39601da177e4SLinus Torvalds if (lock->lk_is_new) { 39611da177e4SLinus Torvalds /* 39621da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3963893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3964893f8770SNeilBrown * lock stateid. 39651da177e4SLinus Torvalds */ 3966dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 39671da177e4SLinus Torvalds 3968684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 3969684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 3970684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 3971684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 3972684e5638SJ. Bruce Fields sizeof(clientid_t)); 3973684e5638SJ. Bruce Fields 39741da177e4SLinus Torvalds status = nfserr_stale_clientid; 3975684e5638SJ. Bruce Fields if (STALE_CLIENTID(&lock->lk_new_clientid)) 39761da177e4SLinus Torvalds goto out; 39771da177e4SLinus Torvalds 39781da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3979c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 39801da177e4SLinus Torvalds lock->lk_new_open_seqid, 39811da177e4SLinus Torvalds &lock->lk_new_open_stateid, 3982c0a5d93eSJ. Bruce Fields &open_stp); 398337515177SNeilBrown if (status) 39841da177e4SLinus Torvalds goto out; 3985fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 3986b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 3987684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 3988b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 3989b34f27aaSJ. Bruce Fields goto out; 399064a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 399164a284d0SJ. Bruce Fields &lock_stp, &new_state); 399264a284d0SJ. Bruce Fields if (status) 39931da177e4SLinus Torvalds goto out; 39941da177e4SLinus Torvalds } else { 39951da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 3996dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 39971da177e4SLinus Torvalds lock->lk_old_lock_seqid, 39981da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 39992288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 40001da177e4SLinus Torvalds if (status) 40011da177e4SLinus Torvalds goto out; 400264a284d0SJ. Bruce Fields } 4003fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 40047d947842SJ. Bruce Fields fp = lock_stp->st_file; 40051da177e4SLinus Torvalds 4006b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4007b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4008b34f27aaSJ. Bruce Fields if (status) 4009b34f27aaSJ. Bruce Fields goto out; 4010b34f27aaSJ. Bruce Fields 40110dd395dcSNeilBrown status = nfserr_grace; 4012af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 40130dd395dcSNeilBrown goto out; 40140dd395dcSNeilBrown status = nfserr_no_grace; 4015af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 40160dd395dcSNeilBrown goto out; 40170dd395dcSNeilBrown 40181da177e4SLinus Torvalds locks_init_lock(&file_lock); 40191da177e4SLinus Torvalds switch (lock->lk_type) { 40201da177e4SLinus Torvalds case NFS4_READ_LT: 40211da177e4SLinus Torvalds case NFS4_READW_LT: 4022f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 40230997b173SJ. Bruce Fields if (filp) 40240997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 40251da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 40261da177e4SLinus Torvalds break; 40271da177e4SLinus Torvalds case NFS4_WRITE_LT: 40281da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4029f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 40300997b173SJ. Bruce Fields if (filp) 40310997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 40321da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 40331da177e4SLinus Torvalds break; 40341da177e4SLinus Torvalds default: 40351da177e4SLinus Torvalds status = nfserr_inval; 40361da177e4SLinus Torvalds goto out; 40371da177e4SLinus Torvalds } 4038f9d7562fSJ. Bruce Fields if (!filp) { 4039f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4040f9d7562fSJ. Bruce Fields goto out; 4041f9d7562fSJ. Bruce Fields } 4042b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 40431da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 40441da177e4SLinus Torvalds file_lock.fl_file = filp; 40451da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4046d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 40471da177e4SLinus Torvalds 40481da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 404987df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 40501da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 40511da177e4SLinus Torvalds 40521da177e4SLinus Torvalds /* 40531da177e4SLinus Torvalds * Try to lock the file in the VFS. 40541da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 40551da177e4SLinus Torvalds */ 40561da177e4SLinus Torvalds 4057529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4058b8dd7b9aSAl Viro switch (-err) { 40591da177e4SLinus Torvalds case 0: /* success! */ 4060dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4061dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 40621da177e4SLinus Torvalds sizeof(stateid_t)); 4063b8dd7b9aSAl Viro status = 0; 4064eb76b3fdSAndy Adamson break; 4065eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4066eb76b3fdSAndy Adamson status = nfserr_denied; 4067eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4068eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4069eb76b3fdSAndy Adamson break; 40701da177e4SLinus Torvalds case (EDEADLK): 40711da177e4SLinus Torvalds status = nfserr_deadlock; 4072eb76b3fdSAndy Adamson break; 40731da177e4SLinus Torvalds default: 4074fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 40753e772463SJ. Bruce Fields status = nfserrno(err); 4076eb76b3fdSAndy Adamson break; 40771da177e4SLinus Torvalds } 40781da177e4SLinus Torvalds out: 407964a284d0SJ. Bruce Fields if (status && new_state) 4080f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 40815ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 40821da177e4SLinus Torvalds nfs4_unlock_state(); 40831da177e4SLinus Torvalds return status; 40841da177e4SLinus Torvalds } 40851da177e4SLinus Torvalds 40861da177e4SLinus Torvalds /* 408755ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 408855ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 408955ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 409055ef1274SJ. Bruce Fields * inode operation.) 409155ef1274SJ. Bruce Fields */ 409255ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 409355ef1274SJ. Bruce Fields { 409455ef1274SJ. Bruce Fields struct file *file; 409555ef1274SJ. Bruce Fields int err; 409655ef1274SJ. Bruce Fields 409755ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 409855ef1274SJ. Bruce Fields if (err) 409955ef1274SJ. Bruce Fields return err; 410055ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 410155ef1274SJ. Bruce Fields nfsd_close(file); 410255ef1274SJ. Bruce Fields return err; 410355ef1274SJ. Bruce Fields } 410455ef1274SJ. Bruce Fields 410555ef1274SJ. Bruce Fields /* 41061da177e4SLinus Torvalds * LOCKT operation 41071da177e4SLinus Torvalds */ 4108b37ad28bSAl Viro __be32 4109ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4110ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 41111da177e4SLinus Torvalds { 41121da177e4SLinus Torvalds struct inode *inode; 41131da177e4SLinus Torvalds struct file_lock file_lock; 4114fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4115fd85b817SMarc Eshel int error; 4116b37ad28bSAl Viro __be32 status; 41171da177e4SLinus Torvalds 4118af558e33SJ. Bruce Fields if (locks_in_grace()) 41191da177e4SLinus Torvalds return nfserr_grace; 41201da177e4SLinus Torvalds 41211da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 41221da177e4SLinus Torvalds return nfserr_inval; 41231da177e4SLinus Torvalds 41241da177e4SLinus Torvalds nfs4_lock_state(); 41251da177e4SLinus Torvalds 41261da177e4SLinus Torvalds status = nfserr_stale_clientid; 412760adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 41281da177e4SLinus Torvalds goto out; 41291da177e4SLinus Torvalds 413075c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 41311da177e4SLinus Torvalds goto out; 41321da177e4SLinus Torvalds 4133ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 41341da177e4SLinus Torvalds locks_init_lock(&file_lock); 41351da177e4SLinus Torvalds switch (lockt->lt_type) { 41361da177e4SLinus Torvalds case NFS4_READ_LT: 41371da177e4SLinus Torvalds case NFS4_READW_LT: 41381da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41391da177e4SLinus Torvalds break; 41401da177e4SLinus Torvalds case NFS4_WRITE_LT: 41411da177e4SLinus Torvalds case NFS4_WRITEW_LT: 41421da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41431da177e4SLinus Torvalds break; 41441da177e4SLinus Torvalds default: 41452fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 41461da177e4SLinus Torvalds status = nfserr_inval; 41471da177e4SLinus Torvalds goto out; 41481da177e4SLinus Torvalds } 41491da177e4SLinus Torvalds 4150fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4151fe0750e5SJ. Bruce Fields if (lo) 4152fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 41531da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41541da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 41551da177e4SLinus Torvalds 41561da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 415787df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 41581da177e4SLinus Torvalds 41591da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41601da177e4SLinus Torvalds 41611da177e4SLinus Torvalds status = nfs_ok; 416255ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4163fd85b817SMarc Eshel if (error) { 4164fd85b817SMarc Eshel status = nfserrno(error); 4165fd85b817SMarc Eshel goto out; 4166fd85b817SMarc Eshel } 41679d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 41681da177e4SLinus Torvalds status = nfserr_denied; 41699d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 41701da177e4SLinus Torvalds } 41711da177e4SLinus Torvalds out: 41721da177e4SLinus Torvalds nfs4_unlock_state(); 41731da177e4SLinus Torvalds return status; 41741da177e4SLinus Torvalds } 41751da177e4SLinus Torvalds 4176b37ad28bSAl Viro __be32 4177ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4178a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 41791da177e4SLinus Torvalds { 4180dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 41811da177e4SLinus Torvalds struct file *filp = NULL; 41821da177e4SLinus Torvalds struct file_lock file_lock; 4183b37ad28bSAl Viro __be32 status; 4184b8dd7b9aSAl Viro int err; 41851da177e4SLinus Torvalds 41861da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 41871da177e4SLinus Torvalds (long long) locku->lu_offset, 41881da177e4SLinus Torvalds (long long) locku->lu_length); 41891da177e4SLinus Torvalds 41901da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 41911da177e4SLinus Torvalds return nfserr_inval; 41921da177e4SLinus Torvalds 41931da177e4SLinus Torvalds nfs4_lock_state(); 41941da177e4SLinus Torvalds 41959072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 41962288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 41979072d5c6SJ. Bruce Fields if (status) 41981da177e4SLinus Torvalds goto out; 4199f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4200f9d7562fSJ. Bruce Fields if (!filp) { 4201f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4202f9d7562fSJ. Bruce Fields goto out; 4203f9d7562fSJ. Bruce Fields } 42041da177e4SLinus Torvalds BUG_ON(!filp); 42051da177e4SLinus Torvalds locks_init_lock(&file_lock); 42061da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4207fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 42081da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42091da177e4SLinus Torvalds file_lock.fl_file = filp; 42101da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4211d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 42121da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 42131da177e4SLinus Torvalds 421487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 42151da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42161da177e4SLinus Torvalds 42171da177e4SLinus Torvalds /* 42181da177e4SLinus Torvalds * Try to unlock the file in the VFS. 42191da177e4SLinus Torvalds */ 4220fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4221b8dd7b9aSAl Viro if (err) { 4222fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 42231da177e4SLinus Torvalds goto out_nfserr; 42241da177e4SLinus Torvalds } 42251da177e4SLinus Torvalds /* 42261da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 42271da177e4SLinus Torvalds */ 4228dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4229dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 42301da177e4SLinus Torvalds 42311da177e4SLinus Torvalds out: 423271c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 42331da177e4SLinus Torvalds nfs4_unlock_state(); 42341da177e4SLinus Torvalds return status; 42351da177e4SLinus Torvalds 42361da177e4SLinus Torvalds out_nfserr: 4237b8dd7b9aSAl Viro status = nfserrno(err); 42381da177e4SLinus Torvalds goto out; 42391da177e4SLinus Torvalds } 42401da177e4SLinus Torvalds 42411da177e4SLinus Torvalds /* 42421da177e4SLinus Torvalds * returns 42431da177e4SLinus Torvalds * 1: locks held by lockowner 42441da177e4SLinus Torvalds * 0: no locks held by lockowner 42451da177e4SLinus Torvalds */ 42461da177e4SLinus Torvalds static int 4247fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 42481da177e4SLinus Torvalds { 42491da177e4SLinus Torvalds struct file_lock **flpp; 4250f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 42511da177e4SLinus Torvalds int status = 0; 42521da177e4SLinus Torvalds 4253b89f4321SArnd Bergmann lock_flocks(); 42541da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4255796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 42561da177e4SLinus Torvalds status = 1; 42571da177e4SLinus Torvalds goto out; 42581da177e4SLinus Torvalds } 4259796dadfdSJ. Bruce Fields } 42601da177e4SLinus Torvalds out: 4261b89f4321SArnd Bergmann unlock_flocks(); 42621da177e4SLinus Torvalds return status; 42631da177e4SLinus Torvalds } 42641da177e4SLinus Torvalds 4265b37ad28bSAl Viro __be32 4266b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4267b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4268b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 42691da177e4SLinus Torvalds { 42701da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 42713e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4272fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4273dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 42741da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 42753e9e3dbeSNeilBrown struct list_head matches; 427616bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4277b37ad28bSAl Viro __be32 status; 42781da177e4SLinus Torvalds 42791da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 42801da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 42811da177e4SLinus Torvalds 42821da177e4SLinus Torvalds /* XXX check for lease expiration */ 42831da177e4SLinus Torvalds 42841da177e4SLinus Torvalds status = nfserr_stale_clientid; 4285849823c5SNeil Brown if (STALE_CLIENTID(clid)) 42861da177e4SLinus Torvalds return status; 42871da177e4SLinus Torvalds 42881da177e4SLinus Torvalds nfs4_lock_state(); 42891da177e4SLinus Torvalds 42901da177e4SLinus Torvalds status = nfserr_locks_held; 42913e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 429206f1f864SJ. Bruce Fields 429316bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 429416bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 429516bfdaafSJ. Bruce Fields continue; 4296599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 42973e9e3dbeSNeilBrown continue; 42983e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4299ea1da636SNeilBrown st_perstateowner) { 4300fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4301fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 43021da177e4SLinus Torvalds goto out; 4303fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 43041da177e4SLinus Torvalds } 43053e9e3dbeSNeilBrown } 43063e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 43073e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 43083e9e3dbeSNeilBrown * have been checked. */ 43091da177e4SLinus Torvalds status = nfs_ok; 43100fa822e4SNeilBrown while (!list_empty(&matches)) { 4311fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4312fe0750e5SJ. Bruce Fields lo_list); 43130fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 43140fa822e4SNeilBrown * for openowners. */ 4315fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4316fe0750e5SJ. Bruce Fields release_lockowner(lo); 43171da177e4SLinus Torvalds } 43181da177e4SLinus Torvalds out: 43191da177e4SLinus Torvalds nfs4_unlock_state(); 43201da177e4SLinus Torvalds return status; 43211da177e4SLinus Torvalds } 43221da177e4SLinus Torvalds 43231da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4324a55370a3SNeilBrown alloc_reclaim(void) 43251da177e4SLinus Torvalds { 4326a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 43271da177e4SLinus Torvalds } 43281da177e4SLinus Torvalds 4329c7b9a459SNeilBrown int 4330a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4331c7b9a459SNeilBrown { 4332c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4333c7b9a459SNeilBrown struct nfs4_client *clp; 4334c7b9a459SNeilBrown 4335e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4336c7b9a459SNeilBrown return clp ? 1 : 0; 4337c7b9a459SNeilBrown } 4338c7b9a459SNeilBrown 43391da177e4SLinus Torvalds /* 43401da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 43411da177e4SLinus Torvalds */ 4342190e4fbfSNeilBrown int 4343190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 43441da177e4SLinus Torvalds { 43451da177e4SLinus Torvalds unsigned int strhashval; 43461da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 43471da177e4SLinus Torvalds 4348a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4349a55370a3SNeilBrown crp = alloc_reclaim(); 43501da177e4SLinus Torvalds if (!crp) 43511da177e4SLinus Torvalds return 0; 4352a55370a3SNeilBrown strhashval = clientstr_hashval(name); 43531da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 43541da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4355a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 43561da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 43571da177e4SLinus Torvalds return 1; 43581da177e4SLinus Torvalds } 43591da177e4SLinus Torvalds 43601da177e4SLinus Torvalds static void 43611da177e4SLinus Torvalds nfs4_release_reclaim(void) 43621da177e4SLinus Torvalds { 43631da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 43641da177e4SLinus Torvalds int i; 43651da177e4SLinus Torvalds 43661da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 43671da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 43681da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 43691da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 43701da177e4SLinus Torvalds list_del(&crp->cr_strhash); 43711da177e4SLinus Torvalds kfree(crp); 43721da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 43731da177e4SLinus Torvalds } 43741da177e4SLinus Torvalds } 43751da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 43761da177e4SLinus Torvalds } 43771da177e4SLinus Torvalds 43781da177e4SLinus Torvalds /* 43791da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 4380fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 43811da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 43821da177e4SLinus Torvalds { 43831da177e4SLinus Torvalds unsigned int strhashval; 43841da177e4SLinus Torvalds struct nfs4_client *clp; 43851da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 43861da177e4SLinus Torvalds 43871da177e4SLinus Torvalds 43881da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 43891da177e4SLinus Torvalds clp = find_confirmed_client(clid); 43901da177e4SLinus Torvalds if (clp == NULL) 43911da177e4SLinus Torvalds return NULL; 43921da177e4SLinus Torvalds 4393a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4394a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4395a55370a3SNeilBrown clp->cl_recdir); 43961da177e4SLinus Torvalds 43971da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4398a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 43991da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4400a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 44011da177e4SLinus Torvalds return crp; 44021da177e4SLinus Torvalds } 44031da177e4SLinus Torvalds } 44041da177e4SLinus Torvalds return NULL; 44051da177e4SLinus Torvalds } 44061da177e4SLinus Torvalds 44071da177e4SLinus Torvalds /* 44081da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 44091da177e4SLinus Torvalds */ 4410b37ad28bSAl Viro __be32 44111da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 44121da177e4SLinus Torvalds { 4413dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 44141da177e4SLinus Torvalds } 44151da177e4SLinus Torvalds 441665178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 441765178db4SBryan Schumaker 441865178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 441965178db4SBryan Schumaker { 442065178db4SBryan Schumaker struct nfs4_client *clp, *next; 442165178db4SBryan Schumaker int count = 0; 442265178db4SBryan Schumaker 442365178db4SBryan Schumaker nfs4_lock_state(); 442465178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 442565178db4SBryan Schumaker nfsd4_remove_clid_dir(clp); 442665178db4SBryan Schumaker expire_client(clp); 442765178db4SBryan Schumaker if (++count == num) 442865178db4SBryan Schumaker break; 442965178db4SBryan Schumaker } 443065178db4SBryan Schumaker nfs4_unlock_state(); 443165178db4SBryan Schumaker 443265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 443365178db4SBryan Schumaker } 443465178db4SBryan Schumaker 443565178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 443665178db4SBryan Schumaker { 443765178db4SBryan Schumaker release_lockowner(lockowner(sop)); 443865178db4SBryan Schumaker } 443965178db4SBryan Schumaker 444065178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 444165178db4SBryan Schumaker { 444265178db4SBryan Schumaker release_openowner(openowner(sop)); 444365178db4SBryan Schumaker } 444465178db4SBryan Schumaker 4445353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 444665178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 444765178db4SBryan Schumaker { 444865178db4SBryan Schumaker int i, count = 0; 444965178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 445065178db4SBryan Schumaker 445116bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 445216bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 445316bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 445416bfdaafSJ. Bruce Fields continue; 445565178db4SBryan Schumaker release_sop(sop); 445665178db4SBryan Schumaker if (++count == num) 445765178db4SBryan Schumaker return count; 445865178db4SBryan Schumaker } 445965178db4SBryan Schumaker } 446065178db4SBryan Schumaker return count; 446165178db4SBryan Schumaker } 446265178db4SBryan Schumaker 446365178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 446465178db4SBryan Schumaker { 446565178db4SBryan Schumaker int count; 446665178db4SBryan Schumaker 446765178db4SBryan Schumaker nfs4_lock_state(); 446816bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 446965178db4SBryan Schumaker nfs4_unlock_state(); 447065178db4SBryan Schumaker 447165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 447265178db4SBryan Schumaker } 447365178db4SBryan Schumaker 447465178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 447565178db4SBryan Schumaker { 447665178db4SBryan Schumaker int count; 447765178db4SBryan Schumaker 447865178db4SBryan Schumaker nfs4_lock_state(); 447916bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 448065178db4SBryan Schumaker nfs4_unlock_state(); 448165178db4SBryan Schumaker 448265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 448365178db4SBryan Schumaker } 448465178db4SBryan Schumaker 448565178db4SBryan Schumaker int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) 448665178db4SBryan Schumaker { 448765178db4SBryan Schumaker int i, count = 0; 448865178db4SBryan Schumaker struct nfs4_file *fp; 448965178db4SBryan Schumaker struct nfs4_delegation *dp, *next; 449065178db4SBryan Schumaker 449165178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 449265178db4SBryan Schumaker list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { 449365178db4SBryan Schumaker list_for_each_entry_safe(dp, next, &fp->fi_delegations, dl_perfile) { 449465178db4SBryan Schumaker deleg_func(dp); 449565178db4SBryan Schumaker if (++count == num) 449665178db4SBryan Schumaker return count; 449765178db4SBryan Schumaker } 449865178db4SBryan Schumaker } 449965178db4SBryan Schumaker } 450065178db4SBryan Schumaker return count; 450165178db4SBryan Schumaker } 450265178db4SBryan Schumaker 450365178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 450465178db4SBryan Schumaker { 450565178db4SBryan Schumaker unsigned int count; 450665178db4SBryan Schumaker 450765178db4SBryan Schumaker nfs4_lock_state(); 450865178db4SBryan Schumaker count = nfsd_process_n_delegations(num, unhash_delegation); 450965178db4SBryan Schumaker nfs4_unlock_state(); 451065178db4SBryan Schumaker 451165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 451265178db4SBryan Schumaker } 451365178db4SBryan Schumaker 451465178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 451565178db4SBryan Schumaker { 451665178db4SBryan Schumaker unsigned int count; 451765178db4SBryan Schumaker 451865178db4SBryan Schumaker nfs4_lock_state(); 451965178db4SBryan Schumaker spin_lock(&recall_lock); 452065178db4SBryan Schumaker count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); 452165178db4SBryan Schumaker spin_unlock(&recall_lock); 452265178db4SBryan Schumaker nfs4_unlock_state(); 452365178db4SBryan Schumaker 452465178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 452565178db4SBryan Schumaker } 452665178db4SBryan Schumaker 452765178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 452865178db4SBryan Schumaker 4529ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 45301da177e4SLinus Torvalds 453172083396SBryan Schumaker void 4532ac4d8ff2SNeilBrown nfs4_state_init(void) 45331da177e4SLinus Torvalds { 453472083396SBryan Schumaker int i; 45351da177e4SLinus Torvalds 45361da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 45371da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 45381da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 45391da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 45401da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 454102cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 45421da177e4SLinus Torvalds } 45435282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 45445282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 45451da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 45461da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 45471da177e4SLinus Torvalds } 454816bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 454916bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 45501da177e4SLinus Torvalds } 45511da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 45521da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 45531da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 45541da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4555ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4556ac4d8ff2SNeilBrown } 4557ac4d8ff2SNeilBrown 4558190e4fbfSNeilBrown static void 4559190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4560190e4fbfSNeilBrown { 4561190e4fbfSNeilBrown int status; 4562190e4fbfSNeilBrown 45630964a3d3SNeilBrown nfs4_lock_state(); 456448483bf2SJ. Bruce Fields nfsd4_init_recdir(); 4565190e4fbfSNeilBrown status = nfsd4_recdir_load(); 45660964a3d3SNeilBrown nfs4_unlock_state(); 4567190e4fbfSNeilBrown if (status) 4568190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4569190e4fbfSNeilBrown } 4570190e4fbfSNeilBrown 4571c2f1a551SMeelap Shah /* 4572c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4573c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4574c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4575c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4576c2f1a551SMeelap Shah * 4577c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4578c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4579c2f1a551SMeelap Shah */ 4580c2f1a551SMeelap Shah static void 4581c2f1a551SMeelap Shah set_max_delegations(void) 4582c2f1a551SMeelap Shah { 4583c2f1a551SMeelap Shah /* 4584c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4585c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4586c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4587c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4588c2f1a551SMeelap Shah */ 4589c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4590c2f1a551SMeelap Shah } 4591c2f1a551SMeelap Shah 4592ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4593ac4d8ff2SNeilBrown 459429ab23ccSJ. Bruce Fields static int 4595ac4d8ff2SNeilBrown __nfs4_state_start(void) 4596ac4d8ff2SNeilBrown { 4597b5a1a81eSJ. Bruce Fields int ret; 4598b5a1a81eSJ. Bruce Fields 45991da177e4SLinus Torvalds boot_time = get_seconds(); 4600af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 46019a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4602e46b498cSJ. Bruce Fields nfsd4_grace); 4603b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4604b5a1a81eSJ. Bruce Fields if (ret) 4605b5a1a81eSJ. Bruce Fields return -ENOMEM; 460658da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 460729ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 460829ab23ccSJ. Bruce Fields return -ENOMEM; 4609b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4610b5a1a81eSJ. Bruce Fields if (ret) 4611b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4612e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4613c2f1a551SMeelap Shah set_max_delegations(); 4614b5a1a81eSJ. Bruce Fields return 0; 4615b5a1a81eSJ. Bruce Fields out_free_laundry: 4616b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4617b5a1a81eSJ. Bruce Fields return ret; 46181da177e4SLinus Torvalds } 46191da177e4SLinus Torvalds 462029ab23ccSJ. Bruce Fields int 462176a3550eSNeilBrown nfs4_state_start(void) 46221da177e4SLinus Torvalds { 4623190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 46244ad9a344SJeff Layton return __nfs4_state_start(); 46251da177e4SLinus Torvalds } 46261da177e4SLinus Torvalds 46271da177e4SLinus Torvalds static void 46281da177e4SLinus Torvalds __nfs4_state_shutdown(void) 46291da177e4SLinus Torvalds { 46301da177e4SLinus Torvalds int i; 46311da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 46321da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 46331da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 46341da177e4SLinus Torvalds 46351da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46361da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 46371da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 46381da177e4SLinus Torvalds expire_client(clp); 46391da177e4SLinus Torvalds } 46401da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 46411da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 46421da177e4SLinus Torvalds expire_client(clp); 46431da177e4SLinus Torvalds } 46441da177e4SLinus Torvalds } 46451da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 46461da177e4SLinus Torvalds spin_lock(&recall_lock); 46471da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 46481da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 46491da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 46501da177e4SLinus Torvalds } 46511da177e4SLinus Torvalds spin_unlock(&recall_lock); 46521da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 46531da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 46541da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 46551da177e4SLinus Torvalds unhash_delegation(dp); 46561da177e4SLinus Torvalds } 46571da177e4SLinus Torvalds 4658190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 46591da177e4SLinus Torvalds } 46601da177e4SLinus Torvalds 46611da177e4SLinus Torvalds void 46621da177e4SLinus Torvalds nfs4_state_shutdown(void) 46631da177e4SLinus Torvalds { 4664afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 46655e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 46662c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 46671da177e4SLinus Torvalds nfs4_lock_state(); 46681da177e4SLinus Torvalds nfs4_release_reclaim(); 46691da177e4SLinus Torvalds __nfs4_state_shutdown(); 46701da177e4SLinus Torvalds nfs4_unlock_state(); 4671c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 46721da177e4SLinus Torvalds } 4673