11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 61da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 91da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 101da177e4SLinus Torvalds * are met: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 131da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 141da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 161da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 171da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 181da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 191da177e4SLinus Torvalds * from this software without specific prior written permission. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 221da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 231da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 241da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 261da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 271da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 281da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 291da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 301da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 311da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 321da177e4SLinus Torvalds * 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 35aceaf78dSDave Hansen #include <linux/file.h> 36b89f4321SArnd Bergmann #include <linux/fs.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4017456804SBryan Schumaker #include <linux/pagemap.h> 417df302f7SChuck Lever #include <linux/ratelimit.h> 4268e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 43363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 449a74af21SBoaz Harrosh #include "xdr4.h" 450a3adadeSJ. Bruce Fields #include "vfs.h" 46bfa4b365SJ. Bruce Fields #include "current_stateid.h" 4799dbb8feSJ. Bruce Fields #include "fault_inject.h" 481da177e4SLinus Torvalds 495e1533c7SStanislav Kinsbursky #include "netns.h" 505e1533c7SStanislav Kinsbursky 511da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds /* Globals */ 54cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 55efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 56f32f3c2dSJ. Bruce Fields 57f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 58f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 59f32f3c2dSJ. Bruce Fields .si_generation = ~0, 60f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 61f32f3c2dSJ. Bruce Fields }; 62f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 63f32f3c2dSJ. Bruce Fields /* all fields zero */ 64f32f3c2dSJ. Bruce Fields }; 6519ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6619ff0f28STigran Mkrtchyan .si_generation = 1, 6719ff0f28STigran Mkrtchyan }; 68f32f3c2dSJ. Bruce Fields 69ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 70fd39ca9aSNeilBrown 71f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 72f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 7319ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds /* forward declarations */ 76fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 771da177e4SLinus Torvalds 788b671b80SJ. Bruce Fields /* Locking: */ 798b671b80SJ. Bruce Fields 808b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 81353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 821da177e4SLinus Torvalds 838b671b80SJ. Bruce Fields /* 848b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 858b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 868b671b80SJ. Bruce Fields * eventually cover more: 878b671b80SJ. Bruce Fields */ 888b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 898b671b80SJ. Bruce Fields 90fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 91fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 92e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 93e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 94e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 95e60d4398SNeilBrown 961da177e4SLinus Torvalds void 971da177e4SLinus Torvalds nfs4_lock_state(void) 981da177e4SLinus Torvalds { 99353ab6e9SIngo Molnar mutex_lock(&client_mutex); 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds 102508dc6e1SBenny Halevy static void free_session(struct kref *); 103508dc6e1SBenny Halevy 104508dc6e1SBenny Halevy /* Must be called under the client_lock */ 105508dc6e1SBenny Halevy static void nfsd4_put_session_locked(struct nfsd4_session *ses) 106508dc6e1SBenny Halevy { 107508dc6e1SBenny Halevy kref_put(&ses->se_ref, free_session); 108508dc6e1SBenny Halevy } 109508dc6e1SBenny Halevy 110508dc6e1SBenny Halevy static void nfsd4_get_session(struct nfsd4_session *ses) 111508dc6e1SBenny Halevy { 112508dc6e1SBenny Halevy kref_get(&ses->se_ref); 113508dc6e1SBenny Halevy } 114508dc6e1SBenny Halevy 1151da177e4SLinus Torvalds void 1161da177e4SLinus Torvalds nfs4_unlock_state(void) 1171da177e4SLinus Torvalds { 118353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds static inline u32 1221da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds u32 x = 0; 1271da177e4SLinus Torvalds while (nbytes--) { 1281da177e4SLinus Torvalds x *= 37; 1291da177e4SLinus Torvalds x += *cptr++; 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds return x; 1321da177e4SLinus Torvalds } 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds static struct list_head del_recall_lru; 1351da177e4SLinus Torvalds 13632513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 13732513b40SJ. Bruce Fields { 13832513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 13932513b40SJ. Bruce Fields } 14032513b40SJ. Bruce Fields 14113cd2184SNeilBrown static inline void 14213cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14313cd2184SNeilBrown { 1448b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1458b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1468b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1478b671b80SJ. Bruce Fields iput(fi->fi_inode); 14832513b40SJ. Bruce Fields nfsd4_free_file(fi); 1498b671b80SJ. Bruce Fields } 15013cd2184SNeilBrown } 15113cd2184SNeilBrown 15213cd2184SNeilBrown static inline void 15313cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 15413cd2184SNeilBrown { 1558b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 15613cd2184SNeilBrown } 15713cd2184SNeilBrown 158ef0f3390SNeilBrown static int num_delegations; 159c2f1a551SMeelap Shah unsigned int max_delegations; 160ef0f3390SNeilBrown 161ef0f3390SNeilBrown /* 162ef0f3390SNeilBrown * Open owner state (share locks) 163ef0f3390SNeilBrown */ 164ef0f3390SNeilBrown 16516bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 16616bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 16716bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 16816bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 169ef0f3390SNeilBrown 17016bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 171ddc04c41SJ. Bruce Fields { 172ddc04c41SJ. Bruce Fields unsigned int ret; 173ddc04c41SJ. Bruce Fields 174ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 175ddc04c41SJ. Bruce Fields ret += clientid; 17616bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 177ddc04c41SJ. Bruce Fields } 178ef0f3390SNeilBrown 17916bfdaafSJ. Bruce Fields static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 180ef0f3390SNeilBrown 181ef0f3390SNeilBrown /* hash table for nfs4_file */ 182ef0f3390SNeilBrown #define FILE_HASH_BITS 8 183ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 18435079582SShan Wei 185ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 186ddc04c41SJ. Bruce Fields { 187ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 188ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 189ddc04c41SJ. Bruce Fields } 190ddc04c41SJ. Bruce Fields 191ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 192ef0f3390SNeilBrown 193998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 194f9d7562fSJ. Bruce Fields { 195f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 196f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 197f9d7562fSJ. Bruce Fields } 198f9d7562fSJ. Bruce Fields 199998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 200998db52cSJ. Bruce Fields { 201998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 202998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 203998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 204998db52cSJ. Bruce Fields } else 205998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 206998db52cSJ. Bruce Fields } 207998db52cSJ. Bruce Fields 208998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 209f9d7562fSJ. Bruce Fields { 210f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 211f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 212f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 213f9d7562fSJ. Bruce Fields } 214f9d7562fSJ. Bruce Fields } 215f9d7562fSJ. Bruce Fields 216998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 217f9d7562fSJ. Bruce Fields { 218f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 219f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 2203d02fa29SJ. Bruce Fields /* 2213d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 2223d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 2233d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 2243d02fa29SJ. Bruce Fields */ 2253d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 2263d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 2273d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 228f9d7562fSJ. Bruce Fields } 229f9d7562fSJ. Bruce Fields } 230f9d7562fSJ. Bruce Fields 231998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 232998db52cSJ. Bruce Fields { 233998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 234998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 235998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 236998db52cSJ. Bruce Fields } else 237998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 238998db52cSJ. Bruce Fields } 239998db52cSJ. Bruce Fields 2406136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 24136d44c60SJ. Bruce Fields { 2426136d2b4SJ. Bruce Fields static int min_stateid = 0; 24338c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2446136d2b4SJ. Bruce Fields int new_stid; 2456136d2b4SJ. Bruce Fields int error; 24636d44c60SJ. Bruce Fields 24738c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2486136d2b4SJ. Bruce Fields /* 249996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 250996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 251996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 252996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2536136d2b4SJ. Bruce Fields */ 2546136d2b4SJ. Bruce Fields BUG_ON(error); 2556136d2b4SJ. Bruce Fields /* 2566136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2576136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2586136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2596136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2606136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2616136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2626136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2636136d2b4SJ. Bruce Fields */ 2646136d2b4SJ. Bruce Fields 2656136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2666136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2676136d2b4SJ. Bruce Fields min_stateid = 0; 2686136d2b4SJ. Bruce Fields return new_stid; 26936d44c60SJ. Bruce Fields } 27036d44c60SJ. Bruce Fields 271996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2722a74aba7SJ. Bruce Fields { 2732a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2746136d2b4SJ. Bruce Fields int new_id; 2752a74aba7SJ. Bruce Fields 2762a74aba7SJ. Bruce Fields stid->sc_type = type; 2772a74aba7SJ. Bruce Fields stid->sc_client = cl; 2782a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2796136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2806136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2812a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2822a74aba7SJ. Bruce Fields s->si_generation = 0; 283996e0938SJ. Bruce Fields } 284996e0938SJ. Bruce Fields 285996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 286996e0938SJ. Bruce Fields { 287996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 288996e0938SJ. Bruce Fields 289996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 290996e0938SJ. Bruce Fields return NULL; 291996e0938SJ. Bruce Fields /* 292996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 293996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 294996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 295996e0938SJ. Bruce Fields * preallocated entries. 296996e0938SJ. Bruce Fields */ 297996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2982a74aba7SJ. Bruce Fields } 2992a74aba7SJ. Bruce Fields 3004cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 3014cdc951bSJ. Bruce Fields { 3024cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 3034cdc951bSJ. Bruce Fields } 3044cdc951bSJ. Bruce Fields 3051da177e4SLinus Torvalds static struct nfs4_delegation * 306dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 3071da177e4SLinus Torvalds { 3081da177e4SLinus Torvalds struct nfs4_delegation *dp; 3091da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 312c3e48080SJ. Bruce Fields /* 313c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 314c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 315c3e48080SJ. Bruce Fields * write delegations properly. 316c3e48080SJ. Bruce Fields */ 317c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 318c3e48080SJ. Bruce Fields return NULL; 31947f9940cSMeelap Shah if (fp->fi_had_conflict) 32047f9940cSMeelap Shah return NULL; 321c2f1a551SMeelap Shah if (num_delegations > max_delegations) 322ef0f3390SNeilBrown return NULL; 323996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 3245b2d21c1SNeilBrown if (dp == NULL) 3251da177e4SLinus Torvalds return dp; 326996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 3272a74aba7SJ. Bruce Fields /* 3282a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3296136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3306136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3312a74aba7SJ. Bruce Fields */ 3322a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 333ef0f3390SNeilBrown num_delegations++; 334ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 335ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3361da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 33713cd2184SNeilBrown get_nfs4_file(fp); 3381da177e4SLinus Torvalds dp->dl_file = fp; 3391da177e4SLinus Torvalds dp->dl_type = type; 3406c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3411da177e4SLinus Torvalds dp->dl_time = 0; 3421da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 343b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 3441da177e4SLinus Torvalds return dp; 3451da177e4SLinus Torvalds } 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds void 3481da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3491da177e4SLinus Torvalds { 3501da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3511da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 35213cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3535b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 354ef0f3390SNeilBrown num_delegations--; 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds 358acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3591da177e4SLinus Torvalds { 360acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 361acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 362acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3634ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 364acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 365acfdf5c3SJ. Bruce Fields } 3661da177e4SLinus Torvalds } 3671da177e4SLinus Torvalds 3686136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3696136d2b4SJ. Bruce Fields { 37038c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 37138c2f4b1SJ. Bruce Fields 37238c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3736136d2b4SJ. Bruce Fields } 3746136d2b4SJ. Bruce Fields 3751da177e4SLinus Torvalds /* Called under the state lock. */ 3761da177e4SLinus Torvalds static void 3771da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3781da177e4SLinus Torvalds { 3796136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 380ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3811da177e4SLinus Torvalds spin_lock(&recall_lock); 3825d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3831da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3841da177e4SLinus Torvalds spin_unlock(&recall_lock); 385acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3861da177e4SLinus Torvalds nfs4_put_delegation(dp); 3871da177e4SLinus Torvalds } 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvalds /* 3901da177e4SLinus Torvalds * SETCLIENTID state 3911da177e4SLinus Torvalds */ 3921da177e4SLinus Torvalds 39336acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3949089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3959089f1b4SBenny Halevy 3961da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3971da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3981da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3991da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 4001da177e4SLinus Torvalds 401ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 402ddc04c41SJ. Bruce Fields { 403ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 404ddc04c41SJ. Bruce Fields } 405ddc04c41SJ. Bruce Fields 406ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 407ddc04c41SJ. Bruce Fields { 408ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 409ddc04c41SJ. Bruce Fields } 410ddc04c41SJ. Bruce Fields 4111da177e4SLinus Torvalds /* 4121da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 4131da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 4141da177e4SLinus Torvalds * 4151da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 4161da177e4SLinus Torvalds * setclientid_confirmed info. 4171da177e4SLinus Torvalds * 4181da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 4191da177e4SLinus Torvalds * setclientid info. 4201da177e4SLinus Torvalds * 4211da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 4221da177e4SLinus Torvalds * for lease renewal. 4231da177e4SLinus Torvalds * 4241da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 4251da177e4SLinus Torvalds * for last close replay. 4261da177e4SLinus Torvalds */ 4271da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 4281da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 4291da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 4301da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 4311da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 4321da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 4331da177e4SLinus Torvalds static struct list_head client_lru; 4341da177e4SLinus Torvalds static struct list_head close_lru; 4351da177e4SLinus Torvalds 436f9d7562fSJ. Bruce Fields /* 437f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 438f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 439f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 440f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 441f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 442f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 443f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 444f9d7562fSJ. Bruce Fields * 445f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 446f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 447f9d7562fSJ. Bruce Fields * 448f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 449f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 450f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 451f9d7562fSJ. Bruce Fields * 452f9d7562fSJ. Bruce Fields * which we should reject. 453f9d7562fSJ. Bruce Fields */ 4545ae037e5SJeff Layton static unsigned int 4555ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 456f9d7562fSJ. Bruce Fields int i; 4575ae037e5SJeff Layton unsigned int access = 0; 458f9d7562fSJ. Bruce Fields 459f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 460f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 4615ae037e5SJeff Layton access |= i; 462f9d7562fSJ. Bruce Fields } 4635ae037e5SJeff Layton return access; 464f9d7562fSJ. Bruce Fields } 465f9d7562fSJ. Bruce Fields 4663a328614SJeff Layton static bool 467dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 468f9d7562fSJ. Bruce Fields unsigned int access, deny; 469f9d7562fSJ. Bruce Fields 4705ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 4715ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 472f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 4733a328614SJeff Layton return false; 4743a328614SJeff Layton return true; 475f9d7562fSJ. Bruce Fields } 476f9d7562fSJ. Bruce Fields 47782c5ff1bSJeff Layton /* set share access for a given stateid */ 47882c5ff1bSJeff Layton static inline void 47982c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 48082c5ff1bSJeff Layton { 48182c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 48282c5ff1bSJeff Layton } 48382c5ff1bSJeff Layton 48482c5ff1bSJeff Layton /* clear share access for a given stateid */ 48582c5ff1bSJeff Layton static inline void 48682c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 48782c5ff1bSJeff Layton { 48882c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 48982c5ff1bSJeff Layton } 49082c5ff1bSJeff Layton 49182c5ff1bSJeff Layton /* test whether a given stateid has access */ 49282c5ff1bSJeff Layton static inline bool 49382c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 49482c5ff1bSJeff Layton { 49582c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 49682c5ff1bSJeff Layton } 49782c5ff1bSJeff Layton 498ce0fc43cSJeff Layton /* set share deny for a given stateid */ 499ce0fc43cSJeff Layton static inline void 500ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 501ce0fc43cSJeff Layton { 502ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 503ce0fc43cSJeff Layton } 504ce0fc43cSJeff Layton 505ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 506ce0fc43cSJeff Layton static inline void 507ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 508ce0fc43cSJeff Layton { 509ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 510ce0fc43cSJeff Layton } 511ce0fc43cSJeff Layton 512ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 513ce0fc43cSJeff Layton static inline bool 514ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 515ce0fc43cSJeff Layton { 516ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 517f9d7562fSJ. Bruce Fields } 518f9d7562fSJ. Bruce Fields 519f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 520f9d7562fSJ. Bruce Fields { 5218f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 522f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 523f9d7562fSJ. Bruce Fields return O_RDONLY; 524f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 525f9d7562fSJ. Bruce Fields return O_WRONLY; 526f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 527f9d7562fSJ. Bruce Fields return O_RDWR; 528f9d7562fSJ. Bruce Fields } 529f9d7562fSJ. Bruce Fields BUG(); 530f9d7562fSJ. Bruce Fields } 531f9d7562fSJ. Bruce Fields 53282c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 53382c5ff1bSJeff Layton static void 53482c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 53582c5ff1bSJeff Layton { 53682c5ff1bSJeff Layton int i; 53782c5ff1bSJeff Layton 53882c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 53982c5ff1bSJeff Layton if (test_access(i, stp)) 54082c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 54182c5ff1bSJeff Layton nfs4_access_to_omode(i)); 54282c5ff1bSJeff Layton clear_access(i, stp); 54382c5ff1bSJeff Layton } 54482c5ff1bSJeff Layton } 54582c5ff1bSJeff Layton 546dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 547529d7b2aSJ. Bruce Fields { 548529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 549529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 550529d7b2aSJ. Bruce Fields } 551529d7b2aSJ. Bruce Fields 552dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 553529d7b2aSJ. Bruce Fields { 55482c5ff1bSJeff Layton release_all_access(stp); 555a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5564665e2baSJ. Bruce Fields stp->st_file = NULL; 5574665e2baSJ. Bruce Fields } 5584665e2baSJ. Bruce Fields 559dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5604665e2baSJ. Bruce Fields { 561529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 562529d7b2aSJ. Bruce Fields } 563529d7b2aSJ. Bruce Fields 564dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 565529d7b2aSJ. Bruce Fields { 566529d7b2aSJ. Bruce Fields struct file *file; 567529d7b2aSJ. Bruce Fields 568529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5696136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 570529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 571529d7b2aSJ. Bruce Fields if (file) 572fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 57338c387b5SJ. Bruce Fields close_generic_stateid(stp); 574529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 575529d7b2aSJ. Bruce Fields } 576529d7b2aSJ. Bruce Fields 577fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 578529d7b2aSJ. Bruce Fields { 579dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 580529d7b2aSJ. Bruce Fields 581fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 582fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 583009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 584fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 585fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 586dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 587529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 588529d7b2aSJ. Bruce Fields } 589529d7b2aSJ. Bruce Fields } 590529d7b2aSJ. Bruce Fields 591fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 592529d7b2aSJ. Bruce Fields { 593fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 594fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 595529d7b2aSJ. Bruce Fields } 596529d7b2aSJ. Bruce Fields 597529d7b2aSJ. Bruce Fields static void 598dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 599529d7b2aSJ. Bruce Fields { 600fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 601529d7b2aSJ. Bruce Fields 602529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 603fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 604fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 605fe0750e5SJ. Bruce Fields release_lockowner(lo); 606529d7b2aSJ. Bruce Fields } 607529d7b2aSJ. Bruce Fields } 608529d7b2aSJ. Bruce Fields 60938c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 6102283963fSJ. Bruce Fields { 6112283963fSJ. Bruce Fields unhash_generic_stateid(stp); 6122283963fSJ. Bruce Fields release_stateid_lockowners(stp); 61338c387b5SJ. Bruce Fields close_generic_stateid(stp); 61438c387b5SJ. Bruce Fields } 61538c387b5SJ. Bruce Fields 61638c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 61738c387b5SJ. Bruce Fields { 61838c387b5SJ. Bruce Fields unhash_open_stateid(stp); 6196136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 6202283963fSJ. Bruce Fields free_generic_stateid(stp); 6212283963fSJ. Bruce Fields } 6222283963fSJ. Bruce Fields 623fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 624f1d110caSJ. Bruce Fields { 625dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 626f1d110caSJ. Bruce Fields 627fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 628fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 629fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 630fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 631dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 632f1d110caSJ. Bruce Fields release_open_stateid(stp); 633f1d110caSJ. Bruce Fields } 634f1d110caSJ. Bruce Fields } 635f1d110caSJ. Bruce Fields 636f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 637f7a4d872SJ. Bruce Fields { 638f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 639f7a4d872SJ. Bruce Fields 640f7a4d872SJ. Bruce Fields if (s) { 6416136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 642f7a4d872SJ. Bruce Fields free_generic_stateid(s); 643f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 644f7a4d872SJ. Bruce Fields } 645f7a4d872SJ. Bruce Fields } 646f7a4d872SJ. Bruce Fields 647fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 648f1d110caSJ. Bruce Fields { 649fe0750e5SJ. Bruce Fields unhash_openowner(oo); 650fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 651f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 652fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 653f1d110caSJ. Bruce Fields } 654f1d110caSJ. Bruce Fields 6555282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6565282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6575282fd72SMarc Eshel 6585282fd72SMarc Eshel static inline int 6595282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6605282fd72SMarc Eshel { 6615282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6625282fd72SMarc Eshel 6635282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6645282fd72SMarc Eshel } 6655282fd72SMarc Eshel 6668f199b82STrond Myklebust #ifdef NFSD_DEBUG 6675282fd72SMarc Eshel static inline void 6685282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6695282fd72SMarc Eshel { 6705282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6715282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6725282fd72SMarc Eshel } 6738f199b82STrond Myklebust #else 6748f199b82STrond Myklebust static inline void 6758f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6768f199b82STrond Myklebust { 6778f199b82STrond Myklebust } 6788f199b82STrond Myklebust #endif 6798f199b82STrond Myklebust 6805282fd72SMarc Eshel 681ec6b5d7bSAndy Adamson static void 682ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 683ec6b5d7bSAndy Adamson { 684ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 685ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 686ec6b5d7bSAndy Adamson 687ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 688ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 689ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 690ec6b5d7bSAndy Adamson sid->reserved = 0; 691ec6b5d7bSAndy Adamson } 692ec6b5d7bSAndy Adamson 693ec6b5d7bSAndy Adamson /* 694a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 695a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 696a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 697a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 698a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 699a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 700a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 701a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 702a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 703a649637cSAndy Adamson * for the SEQUENCE op response: 704ec6b5d7bSAndy Adamson */ 705a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 706a649637cSAndy Adamson 707557ce264SAndy Adamson static void 708557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 709557ce264SAndy Adamson { 710557ce264SAndy Adamson int i; 711557ce264SAndy Adamson 712557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 713557ce264SAndy Adamson kfree(ses->se_slots[i]); 714557ce264SAndy Adamson } 715557ce264SAndy Adamson 716efe0cb6dSJ. Bruce Fields /* 717efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 718efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 719efe0cb6dSJ. Bruce Fields */ 720efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 721efe0cb6dSJ. Bruce Fields { 722efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 723efe0cb6dSJ. Bruce Fields } 724efe0cb6dSJ. Bruce Fields 7255b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 726ec6b5d7bSAndy Adamson { 7275b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 7285b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 729ec6b5d7bSAndy Adamson 7305b6feee9SJ. Bruce Fields return size; 731557ce264SAndy Adamson } 732557ce264SAndy Adamson 7335b6feee9SJ. Bruce Fields /* 7345b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 7355b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 73642b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 7375b6feee9SJ. Bruce Fields */ 7385b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 7395b6feee9SJ. Bruce Fields { 7405b6feee9SJ. Bruce Fields int avail; 7415b6feee9SJ. Bruce Fields 7425b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7435b6feee9SJ. Bruce Fields 7445b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7455b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7465b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7475b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7485b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7495b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7505b6feee9SJ. Bruce Fields 7515b6feee9SJ. Bruce Fields return num; 7525b6feee9SJ. Bruce Fields } 7535b6feee9SJ. Bruce Fields 7545b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7555b6feee9SJ. Bruce Fields { 7565b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7575b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7585b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7595b6feee9SJ. Bruce Fields } 7605b6feee9SJ. Bruce Fields 7615b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 7625b6feee9SJ. Bruce Fields { 7635b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7645b6feee9SJ. Bruce Fields int mem, i; 765ec6b5d7bSAndy Adamson 766c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 767ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7685b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 769ec6b5d7bSAndy Adamson 7705b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7716c18ba9fSAlexandros Batsakis if (!new) 7725b6feee9SJ. Bruce Fields return NULL; 773ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7745b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7755b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7765b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7775b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 778ec6b5d7bSAndy Adamson goto out_free; 779ec6b5d7bSAndy Adamson } 7805b6feee9SJ. Bruce Fields return new; 7815b6feee9SJ. Bruce Fields out_free: 7825b6feee9SJ. Bruce Fields while (i--) 7835b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7845b6feee9SJ. Bruce Fields kfree(new); 7855b6feee9SJ. Bruce Fields return NULL; 7865b6feee9SJ. Bruce Fields } 7875b6feee9SJ. Bruce Fields 7885b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7895b6feee9SJ. Bruce Fields { 7905b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7915b6feee9SJ. Bruce Fields 7925b6feee9SJ. Bruce Fields new->maxreqs = numslots; 793d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 794d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7955b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7965b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7975b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7985b6feee9SJ. Bruce Fields } 7995b6feee9SJ. Bruce Fields 80019cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 80119cf5c02SJ. Bruce Fields { 80219cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 80319cf5c02SJ. Bruce Fields kfree(c); 80419cf5c02SJ. Bruce Fields } 80519cf5c02SJ. Bruce Fields 80619cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 80719cf5c02SJ. Bruce Fields { 80819cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 80919cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 81019cf5c02SJ. Bruce Fields 81119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 81219cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 81319cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 81419cf5c02SJ. Bruce Fields free_conn(c); 81519cf5c02SJ. Bruce Fields } 81619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 817eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 81819cf5c02SJ. Bruce Fields } 81919cf5c02SJ. Bruce Fields 820d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 821c7662518SJ. Bruce Fields { 822c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 823c7662518SJ. Bruce Fields 824c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 825c7662518SJ. Bruce Fields if (!conn) 826db90681dSJ. Bruce Fields return NULL; 827c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 828c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 829d29c374cSJ. Bruce Fields conn->cn_flags = flags; 830db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 831db90681dSJ. Bruce Fields return conn; 832db90681dSJ. Bruce Fields } 833db90681dSJ. Bruce Fields 834328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 835328ead28SJ. Bruce Fields { 836328ead28SJ. Bruce Fields conn->cn_session = ses; 837328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 838328ead28SJ. Bruce Fields } 839328ead28SJ. Bruce Fields 840db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 841db90681dSJ. Bruce Fields { 842db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 843c7662518SJ. Bruce Fields 844c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 845328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 846c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 847db90681dSJ. Bruce Fields } 848c7662518SJ. Bruce Fields 84921b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 850db90681dSJ. Bruce Fields { 85119cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 85221b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 853db90681dSJ. Bruce Fields } 854db90681dSJ. Bruce Fields 8551d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 856db90681dSJ. Bruce Fields { 857db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 85821b75b01SJ. Bruce Fields int ret; 859db90681dSJ. Bruce Fields 8601d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 861db90681dSJ. Bruce Fields if (!conn) 862db90681dSJ. Bruce Fields return nfserr_jukebox; 863db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 86421b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 86521b75b01SJ. Bruce Fields if (ret) 86621b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 86721b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 86824119673SWeston Andros Adamson if (ses->se_client->cl_cb_state == NFSD4_CB_DOWN && 86924119673SWeston Andros Adamson dir & NFS4_CDFC4_BACK) { 87024119673SWeston Andros Adamson /* callback channel may be back up */ 87124119673SWeston Andros Adamson nfsd4_probe_callback(ses->se_client); 87224119673SWeston Andros Adamson } 873c7662518SJ. Bruce Fields return nfs_ok; 874c7662518SJ. Bruce Fields } 875c7662518SJ. Bruce Fields 8761d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 8771d1bc8f2SJ. Bruce Fields { 8781d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8791d1bc8f2SJ. Bruce Fields 8801d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 8811d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 8821d1bc8f2SJ. Bruce Fields 8831d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 8841d1bc8f2SJ. Bruce Fields } 8851d1bc8f2SJ. Bruce Fields 8861d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 88719cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 888c7662518SJ. Bruce Fields { 88919cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 89019cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 89119cf5c02SJ. Bruce Fields 89219cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 89319cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 89419cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 89519cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 89619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 89719cf5c02SJ. Bruce Fields 89819cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 89919cf5c02SJ. Bruce Fields free_conn(c); 90019cf5c02SJ. Bruce Fields 90119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 90219cf5c02SJ. Bruce Fields } 90319cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 904c7662518SJ. Bruce Fields } 905c7662518SJ. Bruce Fields 906508dc6e1SBenny Halevy static void free_session(struct kref *kref) 907c7662518SJ. Bruce Fields { 908c7662518SJ. Bruce Fields struct nfsd4_session *ses; 909c7662518SJ. Bruce Fields int mem; 910c7662518SJ. Bruce Fields 911bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 912c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 91319cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 914c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 915c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 916c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 917c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 918c7662518SJ. Bruce Fields free_session_slots(ses); 919c7662518SJ. Bruce Fields kfree(ses); 920c7662518SJ. Bruce Fields } 921c7662518SJ. Bruce Fields 922508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 923508dc6e1SBenny Halevy { 924508dc6e1SBenny Halevy spin_lock(&client_lock); 925508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 926508dc6e1SBenny Halevy spin_unlock(&client_lock); 927508dc6e1SBenny Halevy } 928508dc6e1SBenny Halevy 929ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 9305b6feee9SJ. Bruce Fields { 9315b6feee9SJ. Bruce Fields struct nfsd4_session *new; 9325b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 9335b6feee9SJ. Bruce Fields int numslots, slotsize; 93457b7b43bSJ. Bruce Fields __be32 status; 9355b6feee9SJ. Bruce Fields int idx; 9365b6feee9SJ. Bruce Fields 9375b6feee9SJ. Bruce Fields /* 9385b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 9395b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 9405b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 9415b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 9425b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 9435b6feee9SJ. Bruce Fields */ 9445b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 9455b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 946ced6dfe9SMi Jinlong if (numslots < 1) 947ced6dfe9SMi Jinlong return NULL; 9485b6feee9SJ. Bruce Fields 9495b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 9505b6feee9SJ. Bruce Fields if (!new) { 9515b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 952ac7c46f2SJ. Bruce Fields return NULL; 9535b6feee9SJ. Bruce Fields } 9545b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 955ec6b5d7bSAndy Adamson 956ec6b5d7bSAndy Adamson new->se_client = clp; 957ec6b5d7bSAndy Adamson gen_sessionid(new); 958ec6b5d7bSAndy Adamson 959c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 960c7662518SJ. Bruce Fields 961ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 962ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9638b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 964ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9655b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9669089f1b4SBenny Halevy spin_lock(&client_lock); 967ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9684c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 969ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9704c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9719089f1b4SBenny Halevy spin_unlock(&client_lock); 972ec6b5d7bSAndy Adamson 9731d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 974ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 975c7662518SJ. Bruce Fields if (status) { 976508dc6e1SBenny Halevy spin_lock(&client_lock); 977c7662518SJ. Bruce Fields free_session(&new->se_ref); 978508dc6e1SBenny Halevy spin_unlock(&client_lock); 979ac7c46f2SJ. Bruce Fields return NULL; 980c7662518SJ. Bruce Fields } 981dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 982edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 983dcbeaa68SJ. Bruce Fields /* 984dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 985dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 986dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 987dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 988dcbeaa68SJ. Bruce Fields * future: 989dcbeaa68SJ. Bruce Fields */ 990edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 991edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 992edd76786SJ. Bruce Fields } 993dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 994ac7c46f2SJ. Bruce Fields return new; 995ec6b5d7bSAndy Adamson } 996ec6b5d7bSAndy Adamson 9979089f1b4SBenny Halevy /* caller must hold client_lock */ 9985282fd72SMarc Eshel static struct nfsd4_session * 9995282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 10005282fd72SMarc Eshel { 10015282fd72SMarc Eshel struct nfsd4_session *elem; 10025282fd72SMarc Eshel int idx; 10035282fd72SMarc Eshel 10045282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 10055282fd72SMarc Eshel idx = hash_sessionid(sessionid); 10065282fd72SMarc Eshel /* Search in the appropriate list */ 10075282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 10085282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 10095282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 10105282fd72SMarc Eshel return elem; 10115282fd72SMarc Eshel } 10125282fd72SMarc Eshel } 10135282fd72SMarc Eshel 10145282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 10155282fd72SMarc Eshel return NULL; 10165282fd72SMarc Eshel } 10175282fd72SMarc Eshel 10189089f1b4SBenny Halevy /* caller must hold client_lock */ 10197116ed6bSAndy Adamson static void 10205282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 10217116ed6bSAndy Adamson { 10227116ed6bSAndy Adamson list_del(&ses->se_hash); 10234c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 10247116ed6bSAndy Adamson list_del(&ses->se_perclnt); 10254c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 10265282fd72SMarc Eshel } 10275282fd72SMarc Eshel 102836acb66bSBenny Halevy /* must be called under the client_lock */ 10291da177e4SLinus Torvalds static inline void 103036acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 10311da177e4SLinus Torvalds { 103207cd4909SBenny Halevy if (is_client_expired(clp)) { 10337447758bSJ. Bruce Fields WARN_ON(1); 10347447758bSJ. Bruce Fields printk("%s: client (clientid %08x/%08x) already expired\n", 103507cd4909SBenny Halevy __func__, 103607cd4909SBenny Halevy clp->cl_clientid.cl_boot, 103707cd4909SBenny Halevy clp->cl_clientid.cl_id); 103807cd4909SBenny Halevy return; 103907cd4909SBenny Halevy } 104007cd4909SBenny Halevy 10411da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 10421da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 10431da177e4SLinus Torvalds clp->cl_clientid.cl_id); 10441da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 10451da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10461da177e4SLinus Torvalds } 10471da177e4SLinus Torvalds 104836acb66bSBenny Halevy static inline void 104936acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 105036acb66bSBenny Halevy { 105136acb66bSBenny Halevy spin_lock(&client_lock); 105236acb66bSBenny Halevy renew_client_locked(clp); 105336acb66bSBenny Halevy spin_unlock(&client_lock); 105436acb66bSBenny Halevy } 105536acb66bSBenny Halevy 10561da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10571da177e4SLinus Torvalds static int 10582c142baaSStanislav Kinsbursky STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) 10591da177e4SLinus Torvalds { 10602c142baaSStanislav Kinsbursky if (clid->cl_boot == nn->boot_time) 10611da177e4SLinus Torvalds return 0; 106260adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 10632c142baaSStanislav Kinsbursky clid->cl_boot, clid->cl_id, nn->boot_time); 10641da177e4SLinus Torvalds return 1; 10651da177e4SLinus Torvalds } 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds /* 10681da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10691da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10701da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10711da177e4SLinus Torvalds */ 107235bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10731da177e4SLinus Torvalds { 10741da177e4SLinus Torvalds struct nfs4_client *clp; 10751da177e4SLinus Torvalds 107635bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 107735bba9a3SJ. Bruce Fields if (clp == NULL) 107835bba9a3SJ. Bruce Fields return NULL; 107967114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 108035bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 108135bba9a3SJ. Bruce Fields kfree(clp); 108235bba9a3SJ. Bruce Fields return NULL; 108335bba9a3SJ. Bruce Fields } 10841da177e4SLinus Torvalds clp->cl_name.len = name.len; 10851da177e4SLinus Torvalds return clp; 10861da177e4SLinus Torvalds } 10871da177e4SLinus Torvalds 10881da177e4SLinus Torvalds static inline void 10891da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10901da177e4SLinus Torvalds { 1091bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 1092792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1093792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1094792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1095792c95ddSJ. Bruce Fields se_perclnt); 1096792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1097508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1098792c95ddSJ. Bruce Fields } 109903a4e1f6SJ. Bruce Fields free_svc_cred(&clp->cl_cred); 11001da177e4SLinus Torvalds kfree(clp->cl_name.data); 11011da177e4SLinus Torvalds kfree(clp); 11021da177e4SLinus Torvalds } 11031da177e4SLinus Torvalds 1104d7682988SBenny Halevy void 1105d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1106d7682988SBenny Halevy { 1107d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1108d7682988SBenny Halevy 1109d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1110d7682988SBenny Halevy return; 1111d7682988SBenny Halevy if (is_client_expired(clp)) { 1112d7682988SBenny Halevy free_client(clp); 1113d7682988SBenny Halevy session->se_client = NULL; 1114d7682988SBenny Halevy } else 1115d7682988SBenny Halevy renew_client_locked(clp); 1116d7682988SBenny Halevy spin_unlock(&client_lock); 1117d7682988SBenny Halevy } 1118d7682988SBenny Halevy 111984d38ac9SBenny Halevy /* must be called under the client_lock */ 112084d38ac9SBenny Halevy static inline void 112184d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 112284d38ac9SBenny Halevy { 1123792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1124792c95ddSJ. Bruce Fields 112507cd4909SBenny Halevy mark_client_expired(clp); 112684d38ac9SBenny Halevy list_del(&clp->cl_lru); 11274c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1128792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1129792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 11304c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 113184d38ac9SBenny Halevy } 113284d38ac9SBenny Halevy 11331da177e4SLinus Torvalds static void 11341da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 11351da177e4SLinus Torvalds { 1136fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 11371da177e4SLinus Torvalds struct nfs4_delegation *dp; 11381da177e4SLinus Torvalds struct list_head reaplist; 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 11411da177e4SLinus Torvalds spin_lock(&recall_lock); 1142ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1143ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1144ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11451da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11461da177e4SLinus Torvalds } 11471da177e4SLinus Torvalds spin_unlock(&recall_lock); 11481da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11491da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11501da177e4SLinus Torvalds unhash_delegation(dp); 11511da177e4SLinus Torvalds } 1152ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1153fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1154fe0750e5SJ. Bruce Fields release_openowner(oo); 11551da177e4SLinus Torvalds } 11566ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11572bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11582bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 115984d38ac9SBenny Halevy list_del(&clp->cl_idhash); 116084d38ac9SBenny Halevy list_del(&clp->cl_strhash); 116184d38ac9SBenny Halevy spin_lock(&client_lock); 116284d38ac9SBenny Halevy unhash_client_locked(clp); 116346583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1164b12a05cbSJ. Bruce Fields free_client(clp); 116546583e25SBenny Halevy spin_unlock(&client_lock); 11661da177e4SLinus Torvalds } 11671da177e4SLinus Torvalds 116835bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 116935bba9a3SJ. Bruce Fields { 117035bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 117135bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11721da177e4SLinus Torvalds } 11731da177e4SLinus Torvalds 117435bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 117535bba9a3SJ. Bruce Fields { 11761da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11771da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11781da177e4SLinus Torvalds } 11791da177e4SLinus Torvalds 118003a4e1f6SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 118135bba9a3SJ. Bruce Fields { 118203a4e1f6SJ. Bruce Fields if (source->cr_principal) { 118303a4e1f6SJ. Bruce Fields target->cr_principal = 118403a4e1f6SJ. Bruce Fields kstrdup(source->cr_principal, GFP_KERNEL); 118503a4e1f6SJ. Bruce Fields if (target->cr_principal == NULL) 118603a4e1f6SJ. Bruce Fields return -ENOMEM; 118703a4e1f6SJ. Bruce Fields } else 118803a4e1f6SJ. Bruce Fields target->cr_principal = NULL; 1189d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 11901da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11911da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11921da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11931da177e4SLinus Torvalds get_group_info(target->cr_group_info); 119403a4e1f6SJ. Bruce Fields return 0; 11951da177e4SLinus Torvalds } 11961da177e4SLinus Torvalds 119735bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1198599e0a22SJ. Bruce Fields { 1199a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 12001da177e4SLinus Torvalds } 12011da177e4SLinus Torvalds 12021da177e4SLinus Torvalds static int 1203599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1204599e0a22SJ. Bruce Fields { 1205599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 12061da177e4SLinus Torvalds } 12071da177e4SLinus Torvalds 12081da177e4SLinus Torvalds static int 1209599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1210599e0a22SJ. Bruce Fields { 1211599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 12121da177e4SLinus Torvalds } 12131da177e4SLinus Torvalds 12148fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 12158fbba96eSJ. Bruce Fields { 12168fbba96eSJ. Bruce Fields int i; 12178fbba96eSJ. Bruce Fields 12188fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 12198fbba96eSJ. Bruce Fields return false; 12208fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 12218fbba96eSJ. Bruce Fields if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) 12228fbba96eSJ. Bruce Fields return false; 12238fbba96eSJ. Bruce Fields return true; 12248fbba96eSJ. Bruce Fields } 12258fbba96eSJ. Bruce Fields 12265559b50aSVivek Trivedi static bool 1227599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1228599e0a22SJ. Bruce Fields { 1229d5497fc6SJ. Bruce Fields if ((cr1->cr_flavor != cr2->cr_flavor) 1230d5497fc6SJ. Bruce Fields || (cr1->cr_uid != cr2->cr_uid) 12318fbba96eSJ. Bruce Fields || (cr1->cr_gid != cr2->cr_gid) 12328fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 12338fbba96eSJ. Bruce Fields return false; 12348fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 12358fbba96eSJ. Bruce Fields return true; 12368fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 12378fbba96eSJ. Bruce Fields return false; 12385559b50aSVivek Trivedi return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); 12391da177e4SLinus Torvalds } 12401da177e4SLinus Torvalds 12415ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 12425ec7b46cSJ. Bruce Fields { 12435ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 12442c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 12455ec7b46cSJ. Bruce Fields 12462c142baaSStanislav Kinsbursky clp->cl_clientid.cl_boot = nn->boot_time; 12471da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 1250deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1251deda2faaSJ. Bruce Fields { 1252ab4684d1SChuck Lever __be32 verf[2]; 1253deda2faaSJ. Bruce Fields static u32 i; 12541da177e4SLinus Torvalds 1255ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1256ab4684d1SChuck Lever verf[1] = (__be32)i++; 1257ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds 126038c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 12614581d140SJ. Bruce Fields { 126238c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 12634581d140SJ. Bruce Fields } 12644d71ab87SJ. Bruce Fields 126538c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1266f459e453SJ. Bruce Fields { 1267f459e453SJ. Bruce Fields struct nfs4_stid *s; 1268f459e453SJ. Bruce Fields 126938c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1270f459e453SJ. Bruce Fields if (!s) 1271f459e453SJ. Bruce Fields return NULL; 1272f459e453SJ. Bruce Fields if (typemask & s->sc_type) 12734d71ab87SJ. Bruce Fields return s; 12744581d140SJ. Bruce Fields return NULL; 12754581d140SJ. Bruce Fields } 12764581d140SJ. Bruce Fields 1277b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1278b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1279b09333c4SRicardo Labiaga { 1280b09333c4SRicardo Labiaga struct nfs4_client *clp; 1281b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 128203a4e1f6SJ. Bruce Fields int ret; 1283b09333c4SRicardo Labiaga 1284b09333c4SRicardo Labiaga clp = alloc_client(name); 1285b09333c4SRicardo Labiaga if (clp == NULL) 1286b09333c4SRicardo Labiaga return NULL; 1287b09333c4SRicardo Labiaga 1288792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 128903a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 129003a4e1f6SJ. Bruce Fields if (ret) { 1291508dc6e1SBenny Halevy spin_lock(&client_lock); 1292b09333c4SRicardo Labiaga free_client(clp); 1293508dc6e1SBenny Halevy spin_unlock(&client_lock); 1294b09333c4SRicardo Labiaga return NULL; 1295b09333c4SRicardo Labiaga } 129638c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1297b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 129846583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 129977a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1300b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1301b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1302b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1303b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1304b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 13055ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 13066ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1307cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 130807cd4909SBenny Halevy clp->cl_time = get_seconds(); 1309b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1310b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1311b09333c4SRicardo Labiaga copy_verf(clp, verf); 1312b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1313b09333c4SRicardo Labiaga gen_confirm(clp); 1314edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1315b09333c4SRicardo Labiaga return clp; 1316b09333c4SRicardo Labiaga } 1317b09333c4SRicardo Labiaga 1318fd39ca9aSNeilBrown static void 13191da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 13201da177e4SLinus Torvalds { 13211da177e4SLinus Torvalds unsigned int idhashval; 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 13241da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13251da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 132636acb66bSBenny Halevy renew_client(clp); 13271da177e4SLinus Torvalds } 13281da177e4SLinus Torvalds 1329fd39ca9aSNeilBrown static void 13301da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 13311da177e4SLinus Torvalds { 13321da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13331da177e4SLinus Torvalds unsigned int strhashval; 13341da177e4SLinus Torvalds 13351da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1336f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1337a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1338328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 13391da177e4SLinus Torvalds renew_client(clp); 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds static struct nfs4_client * 13431da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 13441da177e4SLinus Torvalds { 13451da177e4SLinus Torvalds struct nfs4_client *clp; 13461da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1349a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1350a50d2ad1SJ. Bruce Fields renew_client(clp); 13511da177e4SLinus Torvalds return clp; 13521da177e4SLinus Torvalds } 1353a50d2ad1SJ. Bruce Fields } 13541da177e4SLinus Torvalds return NULL; 13551da177e4SLinus Torvalds } 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds static struct nfs4_client * 13581da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 13591da177e4SLinus Torvalds { 13601da177e4SLinus Torvalds struct nfs4_client *clp; 13611da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1364599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 13651da177e4SLinus Torvalds return clp; 13661da177e4SLinus Torvalds } 13671da177e4SLinus Torvalds return NULL; 13681da177e4SLinus Torvalds } 13691da177e4SLinus Torvalds 13706e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1371a1bcecd2SAndy Adamson { 13726e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1373a1bcecd2SAndy Adamson } 1374a1bcecd2SAndy Adamson 137528ce6054SNeilBrown static struct nfs4_client * 1376e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 137728ce6054SNeilBrown { 137828ce6054SNeilBrown struct nfs4_client *clp; 137928ce6054SNeilBrown 138028ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1381e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 138228ce6054SNeilBrown return clp; 138328ce6054SNeilBrown } 138428ce6054SNeilBrown return NULL; 138528ce6054SNeilBrown } 138628ce6054SNeilBrown 138728ce6054SNeilBrown static struct nfs4_client * 1388e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 138928ce6054SNeilBrown { 139028ce6054SNeilBrown struct nfs4_client *clp; 139128ce6054SNeilBrown 139228ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1393e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 139428ce6054SNeilBrown return clp; 139528ce6054SNeilBrown } 139628ce6054SNeilBrown return NULL; 139728ce6054SNeilBrown } 139828ce6054SNeilBrown 1399fd39ca9aSNeilBrown static void 14006f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 14011da177e4SLinus Torvalds { 140207263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 14036f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 14046f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 14057077ecbaSJeff Layton unsigned short expected_family; 14061da177e4SLinus Torvalds 14077077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 14087077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 14097077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 14107077ecbaSJeff Layton expected_family = AF_INET; 14117077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 14127077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 14137077ecbaSJeff Layton expected_family = AF_INET6; 14147077ecbaSJeff Layton else 14151da177e4SLinus Torvalds goto out_err; 14161da177e4SLinus Torvalds 1417f2ac4dc9SStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, 1418aa9a4ec7SJeff Layton se->se_callback_addr_len, 141907263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 142007263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1421aa9a4ec7SJeff Layton 142207263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 14231da177e4SLinus Torvalds goto out_err; 1424aa9a4ec7SJeff Layton 142507263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 142607263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1427fbf4665fSJeff Layton 142807263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 142907263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1430849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 14311da177e4SLinus Torvalds return; 14321da177e4SLinus Torvalds out_err: 143307263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 143407263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1435849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 14361da177e4SLinus Torvalds "will not receive delegations\n", 14371da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 14381da177e4SLinus Torvalds 14391da177e4SLinus Torvalds return; 14401da177e4SLinus Torvalds } 14411da177e4SLinus Torvalds 1442074fe897SAndy Adamson /* 1443557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1444074fe897SAndy Adamson */ 1445074fe897SAndy Adamson void 1446074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1447074fe897SAndy Adamson { 1448557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1449557ce264SAndy Adamson unsigned int base; 1450074fe897SAndy Adamson 1451557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1452074fe897SAndy Adamson 1453557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1454557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1455bf864a31SAndy Adamson 1456bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1457bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1458557ce264SAndy Adamson slot->sl_datalen = 0; 1459bf864a31SAndy Adamson return; 1460bf864a31SAndy Adamson } 1461557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1462557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1463557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1464557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1465557ce264SAndy Adamson slot->sl_datalen)) 1466557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1467557ce264SAndy Adamson return; 1468074fe897SAndy Adamson } 1469074fe897SAndy Adamson 1470074fe897SAndy Adamson /* 1471abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1472abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1473abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1474abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1475abfabf8cSAndy Adamson * 1476074fe897SAndy Adamson */ 1477abfabf8cSAndy Adamson static __be32 1478abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1479abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1480074fe897SAndy Adamson { 1481abfabf8cSAndy Adamson struct nfsd4_op *op; 1482abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1483074fe897SAndy Adamson 1484abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1485abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1486abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1487abfabf8cSAndy Adamson 1488abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 148973e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1490abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1491abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1492abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1493074fe897SAndy Adamson } 1494abfabf8cSAndy Adamson return op->status; 1495074fe897SAndy Adamson } 1496074fe897SAndy Adamson 1497074fe897SAndy Adamson /* 1498557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1499557ce264SAndy Adamson * session values. 1500074fe897SAndy Adamson */ 1501074fe897SAndy Adamson __be32 1502bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1503bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1504074fe897SAndy Adamson { 1505557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1506074fe897SAndy Adamson __be32 status; 1507074fe897SAndy Adamson 1508557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1509074fe897SAndy Adamson 1510abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1511abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1512abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1513abfabf8cSAndy Adamson return status; 1514074fe897SAndy Adamson 1515557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1516557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1517074fe897SAndy Adamson 1518557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1519557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1520557ce264SAndy Adamson status = slot->sl_status; 1521074fe897SAndy Adamson 1522074fe897SAndy Adamson return status; 1523074fe897SAndy Adamson } 1524074fe897SAndy Adamson 15250733d213SAndy Adamson /* 15260733d213SAndy Adamson * Set the exchange_id flags returned by the server. 15270733d213SAndy Adamson */ 15280733d213SAndy Adamson static void 15290733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 15300733d213SAndy Adamson { 15310733d213SAndy Adamson /* pNFS is not supported */ 15320733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 15330733d213SAndy Adamson 15340733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 15350733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 15360733d213SAndy Adamson 15370733d213SAndy Adamson /* set the wire flags to return to client. */ 15380733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 15390733d213SAndy Adamson } 15400733d213SAndy Adamson 1541631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 1542631fc9eaSJ. Bruce Fields { 1543631fc9eaSJ. Bruce Fields /* 1544631fc9eaSJ. Bruce Fields * Note clp->cl_openowners check isn't quite right: there's no 1545631fc9eaSJ. Bruce Fields * need to count owners without stateid's. 1546631fc9eaSJ. Bruce Fields * 1547631fc9eaSJ. Bruce Fields * Also note we should probably be using this in 4.0 case too. 1548631fc9eaSJ. Bruce Fields */ 15496eccece9SJ. Bruce Fields return !list_empty(&clp->cl_openowners) 15506eccece9SJ. Bruce Fields || !list_empty(&clp->cl_delegations) 15516eccece9SJ. Bruce Fields || !list_empty(&clp->cl_sessions); 1552631fc9eaSJ. Bruce Fields } 1553631fc9eaSJ. Bruce Fields 1554b37ad28bSAl Viro __be32 1555069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1556069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1557069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1558069b6ad4SAndy Adamson { 15590733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 156057b7b43bSJ. Bruce Fields __be32 status; 15610733d213SAndy Adamson unsigned int strhashval; 15620733d213SAndy Adamson char dname[HEXDIR_LEN]; 1563363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 15640733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1565363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 156683e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 15670733d213SAndy Adamson 1568363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 15690733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1570363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 15710733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1572363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 15730733d213SAndy Adamson 1574a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 15750733d213SAndy Adamson return nfserr_inval; 15760733d213SAndy Adamson 15770733d213SAndy Adamson /* Currently only support SP4_NONE */ 15780733d213SAndy Adamson switch (exid->spa_how) { 15790733d213SAndy Adamson case SP4_NONE: 15800733d213SAndy Adamson break; 15810733d213SAndy Adamson case SP4_SSV: 1582044bc1d4SJ. Bruce Fields return nfserr_serverfault; 15830733d213SAndy Adamson default: 15840733d213SAndy Adamson BUG(); /* checked by xdr code */ 15850733d213SAndy Adamson case SP4_MACH_CRED: 15860733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 15870733d213SAndy Adamson } 15880733d213SAndy Adamson 15890733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 15900733d213SAndy Adamson 15910733d213SAndy Adamson if (status) 15922786cc3aSJ. Bruce Fields return status; 15930733d213SAndy Adamson 15940733d213SAndy Adamson strhashval = clientstr_hashval(dname); 15950733d213SAndy Adamson 15962dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 15970733d213SAndy Adamson nfs4_lock_state(); 1598e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 15990733d213SAndy Adamson if (conf) { 160083e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 160183e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 160283e08fd4SJ. Bruce Fields 1603136e658dSJ. Bruce Fields if (update) { 1604136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 16052dbb269dSJ. Bruce Fields status = nfserr_inval; 1606e203d506SJ. Bruce Fields goto out; 1607e203d506SJ. Bruce Fields } 16082dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 16090733d213SAndy Adamson status = nfserr_perm; 16100733d213SAndy Adamson goto out; 16110733d213SAndy Adamson } 16122dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 16130733d213SAndy Adamson status = nfserr_not_same; 16140733d213SAndy Adamson goto out; 16150733d213SAndy Adamson } 1616136e658dSJ. Bruce Fields /* case 6 */ 16170733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 16180733d213SAndy Adamson new = conf; 16190733d213SAndy Adamson goto out_copy; 16206ddbbbfeSMike Sager } 1621136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 1622631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 1623136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 1624136e658dSJ. Bruce Fields goto out; 1625136e658dSJ. Bruce Fields } 1626b9831b59SJ. Bruce Fields expire_client(conf); 1627b9831b59SJ. Bruce Fields goto out_new; 1628631fc9eaSJ. Bruce Fields } 1629136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 16300f1ba0efSJ. Bruce Fields conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 1631136e658dSJ. Bruce Fields new = conf; 1632136e658dSJ. Bruce Fields goto out_copy; 1633136e658dSJ. Bruce Fields } 16342dbb269dSJ. Bruce Fields /* case 5, client reboot */ 16350733d213SAndy Adamson goto out_new; 16360733d213SAndy Adamson } 16376ddbbbfeSMike Sager 16382dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 16390733d213SAndy Adamson status = nfserr_noent; 16400733d213SAndy Adamson goto out; 16410733d213SAndy Adamson } 16420733d213SAndy Adamson 1643e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 16442dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 16450733d213SAndy Adamson expire_client(unconf); 16460733d213SAndy Adamson 16472dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 16480733d213SAndy Adamson out_new: 1649b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 16500733d213SAndy Adamson if (new == NULL) { 16514731030dSJ. Bruce Fields status = nfserr_jukebox; 16520733d213SAndy Adamson goto out; 16530733d213SAndy Adamson } 16540733d213SAndy Adamson 16550733d213SAndy Adamson gen_clid(new); 16560733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 16570733d213SAndy Adamson out_copy: 16580733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 16590733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 16600733d213SAndy Adamson 1661778df3f0SJ. Bruce Fields exid->seqid = new->cl_cs_slot.sl_seqid + 1; 16620733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 16630733d213SAndy Adamson 16640733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 166549557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 16660733d213SAndy Adamson status = nfs_ok; 16670733d213SAndy Adamson 16680733d213SAndy Adamson out: 16690733d213SAndy Adamson nfs4_unlock_state(); 16700733d213SAndy Adamson return status; 1671069b6ad4SAndy Adamson } 1672069b6ad4SAndy Adamson 167357b7b43bSJ. Bruce Fields static __be32 167488e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1675b85d4c01SBenny Halevy { 167688e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 167788e588d5SAndy Adamson slot_seqid); 1678b85d4c01SBenny Halevy 1679b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 168088e588d5SAndy Adamson if (slot_inuse) { 168188e588d5SAndy Adamson if (seqid == slot_seqid) 1682b85d4c01SBenny Halevy return nfserr_jukebox; 1683b85d4c01SBenny Halevy else 1684b85d4c01SBenny Halevy return nfserr_seq_misordered; 1685b85d4c01SBenny Halevy } 1686f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 168788e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1688b85d4c01SBenny Halevy return nfs_ok; 168988e588d5SAndy Adamson if (seqid == slot_seqid) 1690b85d4c01SBenny Halevy return nfserr_replay_cache; 1691b85d4c01SBenny Halevy return nfserr_seq_misordered; 1692b85d4c01SBenny Halevy } 1693b85d4c01SBenny Halevy 169449557cc7SAndy Adamson /* 169549557cc7SAndy Adamson * Cache the create session result into the create session single DRC 169649557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 169749557cc7SAndy Adamson * Do this for solo or embedded create session operations. 169849557cc7SAndy Adamson */ 169949557cc7SAndy Adamson static void 170049557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 170157b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 170249557cc7SAndy Adamson { 170349557cc7SAndy Adamson slot->sl_status = nfserr; 170449557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 170549557cc7SAndy Adamson } 170649557cc7SAndy Adamson 170749557cc7SAndy Adamson static __be32 170849557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 170949557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 171049557cc7SAndy Adamson { 171149557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 171249557cc7SAndy Adamson return slot->sl_status; 171349557cc7SAndy Adamson } 171449557cc7SAndy Adamson 17151b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 17161b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 17171b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17181b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 17191b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17201b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 17211b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 17221b74c25bSMi Jinlong 17231b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 17241b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 17251b74c25bSMi Jinlong 1 + /* status */ \ 17261b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17271b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 17281b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17291b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 17301b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 17311b74c25bSMi Jinlong 173257b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 17331b74c25bSMi Jinlong { 17341b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 17351b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 17361b74c25bSMi Jinlong } 17371b74c25bSMi Jinlong 1738069b6ad4SAndy Adamson __be32 1739069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1740069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1741069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1742069b6ad4SAndy Adamson { 1743363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1744ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1745ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 174649557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 174786c3e16cSJ. Bruce Fields bool confirm_me = false; 174857b7b43bSJ. Bruce Fields __be32 status = 0; 1749ec6b5d7bSAndy Adamson 1750a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1751a62573dcSMi Jinlong return nfserr_inval; 1752a62573dcSMi Jinlong 1753ec6b5d7bSAndy Adamson nfs4_lock_state(); 1754ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1755ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1756ec6b5d7bSAndy Adamson 1757ec6b5d7bSAndy Adamson if (conf) { 175849557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 175949557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 176038eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 176149557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 176238eb76a5SAndy Adamson goto out; 176349557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1764ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1765ec6b5d7bSAndy Adamson goto out; 1766ec6b5d7bSAndy Adamson } 1767ec6b5d7bSAndy Adamson } else if (unconf) { 1768ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1769363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1770ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1771ec6b5d7bSAndy Adamson goto out; 1772ec6b5d7bSAndy Adamson } 177349557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 177449557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 177538eb76a5SAndy Adamson if (status) { 177638eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1777ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1778cd5b8144SJ. Bruce Fields goto out; 1779ec6b5d7bSAndy Adamson } 178086c3e16cSJ. Bruce Fields confirm_me = true; 1781ec6b5d7bSAndy Adamson conf = unconf; 1782ec6b5d7bSAndy Adamson } else { 1783ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1784ec6b5d7bSAndy Adamson goto out; 1785ec6b5d7bSAndy Adamson } 1786ec6b5d7bSAndy Adamson 1787408b79bcSJ. Bruce Fields /* 17888323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 17898323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 17908323c3b2SJ. Bruce Fields */ 17918323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 17928323c3b2SJ. Bruce Fields /* 1793408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1794408b79bcSJ. Bruce Fields */ 1795408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1796408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1797408b79bcSJ. Bruce Fields 17981b74c25bSMi Jinlong status = nfserr_toosmall; 17991b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 18001b74c25bSMi Jinlong goto out; 18011b74c25bSMi Jinlong 1802ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1803ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1804ac7c46f2SJ. Bruce Fields if (!new) 1805ec6b5d7bSAndy Adamson goto out; 1806ac7c46f2SJ. Bruce Fields status = nfs_ok; 1807ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1808ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 180912050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 181012050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 181186c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 181249557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1813ec6b5d7bSAndy Adamson 181449557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 181549557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 1816b9831b59SJ. Bruce Fields if (confirm_me) { 1817b9831b59SJ. Bruce Fields unsigned int hash = clientstr_hashval(unconf->cl_recdir); 1818b9831b59SJ. Bruce Fields struct nfs4_client *old = 1819b9831b59SJ. Bruce Fields find_confirmed_client_by_str(conf->cl_recdir, hash); 1820b9831b59SJ. Bruce Fields if (old) 1821b9831b59SJ. Bruce Fields expire_client(old); 182286c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1823b9831b59SJ. Bruce Fields } 1824ec6b5d7bSAndy Adamson out: 1825ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1826ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1827ec6b5d7bSAndy Adamson return status; 1828069b6ad4SAndy Adamson } 1829069b6ad4SAndy Adamson 183057716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 183157716355SJ. Bruce Fields { 183257716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 183357716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 183457716355SJ. Bruce Fields 183557716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 183657716355SJ. Bruce Fields } 183757716355SJ. Bruce Fields 18381d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 18391d1bc8f2SJ. Bruce Fields { 18401d1bc8f2SJ. Bruce Fields switch (*dir) { 18411d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 18421d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 18431d1bc8f2SJ. Bruce Fields return nfs_ok; 18441d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 18451d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 18461d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 18471d1bc8f2SJ. Bruce Fields return nfs_ok; 18481d1bc8f2SJ. Bruce Fields }; 18491d1bc8f2SJ. Bruce Fields return nfserr_inval; 18501d1bc8f2SJ. Bruce Fields } 18511d1bc8f2SJ. Bruce Fields 18521d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 18531d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 18541d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 18551d1bc8f2SJ. Bruce Fields { 18561d1bc8f2SJ. Bruce Fields __be32 status; 18571d1bc8f2SJ. Bruce Fields 18581d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 18591d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 18601d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 18611d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 18621d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 18631d1bc8f2SJ. Bruce Fields * client_lock iself: */ 18641d1bc8f2SJ. Bruce Fields if (cstate->session) { 18651d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 18661d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 18671d1bc8f2SJ. Bruce Fields } 18681d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 18691d1bc8f2SJ. Bruce Fields if (!cstate->session) 18701d1bc8f2SJ. Bruce Fields return nfserr_badsession; 18711d1bc8f2SJ. Bruce Fields 18721d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 18731db2b9ddSBryan Schumaker if (!status) 18741d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 18751db2b9ddSBryan Schumaker return status; 18761d1bc8f2SJ. Bruce Fields } 18771d1bc8f2SJ. Bruce Fields 18785d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 18795d4cec2fSJ. Bruce Fields { 18805d4cec2fSJ. Bruce Fields if (!session) 18815d4cec2fSJ. Bruce Fields return 0; 18825d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 18835d4cec2fSJ. Bruce Fields } 18845d4cec2fSJ. Bruce Fields 1885069b6ad4SAndy Adamson __be32 1886069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1887069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1888069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1889069b6ad4SAndy Adamson { 1890e10e0cfcSBenny Halevy struct nfsd4_session *ses; 189157b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1892e10e0cfcSBenny Halevy 1893e10e0cfcSBenny Halevy /* Notes: 1894e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1895e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1896e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1897e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1898e10e0cfcSBenny Halevy */ 1899e10e0cfcSBenny Halevy 19005d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 190157716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 190257716355SJ. Bruce Fields return nfserr_not_only_op; 190357716355SJ. Bruce Fields } 1904e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 19059089f1b4SBenny Halevy spin_lock(&client_lock); 1906e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1907e10e0cfcSBenny Halevy if (!ses) { 19089089f1b4SBenny Halevy spin_unlock(&client_lock); 1909e10e0cfcSBenny Halevy goto out; 1910e10e0cfcSBenny Halevy } 1911e10e0cfcSBenny Halevy 1912e10e0cfcSBenny Halevy unhash_session(ses); 19139089f1b4SBenny Halevy spin_unlock(&client_lock); 1914e10e0cfcSBenny Halevy 1915ab707e15SBenny Halevy nfs4_lock_state(); 191684f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1917ab707e15SBenny Halevy nfs4_unlock_state(); 191819cf5c02SJ. Bruce Fields 1919508dc6e1SBenny Halevy spin_lock(&client_lock); 192019cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1921508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1922508dc6e1SBenny Halevy spin_unlock(&client_lock); 1923e10e0cfcSBenny Halevy status = nfs_ok; 1924e10e0cfcSBenny Halevy out: 1925e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1926e10e0cfcSBenny Halevy return status; 1927069b6ad4SAndy Adamson } 1928069b6ad4SAndy Adamson 1929a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1930328ead28SJ. Bruce Fields { 1931328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1932328ead28SJ. Bruce Fields 1933328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1934a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1935328ead28SJ. Bruce Fields return c; 1936328ead28SJ. Bruce Fields } 1937328ead28SJ. Bruce Fields } 1938328ead28SJ. Bruce Fields return NULL; 1939328ead28SJ. Bruce Fields } 1940328ead28SJ. Bruce Fields 1941a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1942328ead28SJ. Bruce Fields { 1943328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1944a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 194521b75b01SJ. Bruce Fields int ret; 1946328ead28SJ. Bruce Fields 1947328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1948a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1949328ead28SJ. Bruce Fields if (c) { 1950328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1951328ead28SJ. Bruce Fields free_conn(new); 1952328ead28SJ. Bruce Fields return; 1953328ead28SJ. Bruce Fields } 1954328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1955328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 195621b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 195721b75b01SJ. Bruce Fields if (ret) 195821b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 195921b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1960328ead28SJ. Bruce Fields return; 1961328ead28SJ. Bruce Fields } 1962328ead28SJ. Bruce Fields 1963868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1964868b89c3SMi Jinlong { 1965868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1966868b89c3SMi Jinlong 1967868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1968868b89c3SMi Jinlong } 1969868b89c3SMi Jinlong 1970ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1971ae82a8d0SMi Jinlong struct nfsd4_session *session) 1972ae82a8d0SMi Jinlong { 1973ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1974ae82a8d0SMi Jinlong 1975ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1976ae82a8d0SMi Jinlong } 1977ae82a8d0SMi Jinlong 1978069b6ad4SAndy Adamson __be32 1979b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1980069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1981069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1982069b6ad4SAndy Adamson { 1983f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1984b85d4c01SBenny Halevy struct nfsd4_session *session; 1985b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1986a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 198757b7b43bSJ. Bruce Fields __be32 status; 1988b85d4c01SBenny Halevy 1989f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1990f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1991f9bb94c4SAndy Adamson 1992a663bdd8SJ. Bruce Fields /* 1993a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1994a663bdd8SJ. Bruce Fields * below. 1995a663bdd8SJ. Bruce Fields */ 1996a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1997a663bdd8SJ. Bruce Fields if (!conn) 1998a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1999a663bdd8SJ. Bruce Fields 20009089f1b4SBenny Halevy spin_lock(&client_lock); 2001b85d4c01SBenny Halevy status = nfserr_badsession; 2002b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 2003b85d4c01SBenny Halevy if (!session) 2004b85d4c01SBenny Halevy goto out; 2005b85d4c01SBenny Halevy 2006868b89c3SMi Jinlong status = nfserr_too_many_ops; 2007868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 2008868b89c3SMi Jinlong goto out; 2009868b89c3SMi Jinlong 2010ae82a8d0SMi Jinlong status = nfserr_req_too_big; 2011ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 2012ae82a8d0SMi Jinlong goto out; 2013ae82a8d0SMi Jinlong 2014b85d4c01SBenny Halevy status = nfserr_badslot; 20156c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 2016b85d4c01SBenny Halevy goto out; 2017b85d4c01SBenny Halevy 2018557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 2019b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 2020b85d4c01SBenny Halevy 2021a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 2022a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 2023a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 2024a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 2025a8dfdaebSAndy Adamson 202673e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 202773e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 2028b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 2029bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 2030bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 2031bf5c43c8SJ. Bruce Fields goto out; 2032b85d4c01SBenny Halevy cstate->slot = slot; 2033b85d4c01SBenny Halevy cstate->session = session; 2034da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 2035557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 2036bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 2037da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2038aaf84eb9SBenny Halevy goto out; 2039b85d4c01SBenny Halevy } 2040b85d4c01SBenny Halevy if (status) 2041b85d4c01SBenny Halevy goto out; 2042b85d4c01SBenny Halevy 2043a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 2044a663bdd8SJ. Bruce Fields conn = NULL; 2045328ead28SJ. Bruce Fields 2046b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2047b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2048bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 204973e79482SJ. Bruce Fields if (seq->cachethis) 205073e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2051bf5c43c8SJ. Bruce Fields else 2052bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2053b85d4c01SBenny Halevy 2054b85d4c01SBenny Halevy cstate->slot = slot; 2055b85d4c01SBenny Halevy cstate->session = session; 2056b85d4c01SBenny Halevy 2057b85d4c01SBenny Halevy out: 205826c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 2059aaf84eb9SBenny Halevy if (cstate->session) { 20600d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 20610d7bb719SJ. Bruce Fields 206236acb66bSBenny Halevy nfsd4_get_session(cstate->session); 20630d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 20645423732aSBenny Halevy switch (clp->cl_cb_state) { 20655423732aSBenny Halevy case NFSD4_CB_DOWN: 2066fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 20675423732aSBenny Halevy break; 20685423732aSBenny Halevy case NFSD4_CB_FAULT: 2069fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 20705423732aSBenny Halevy break; 2071fc0c3dd1SBenny Halevy default: 2072fc0c3dd1SBenny Halevy seq->status_flags = 0; 20735423732aSBenny Halevy } 2074aaf84eb9SBenny Halevy } 2075a663bdd8SJ. Bruce Fields kfree(conn); 207636acb66bSBenny Halevy spin_unlock(&client_lock); 2077b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2078b85d4c01SBenny Halevy return status; 2079069b6ad4SAndy Adamson } 2080069b6ad4SAndy Adamson 2081345c2842SMi Jinlong __be32 2082345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2083345c2842SMi Jinlong { 2084345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 208557b7b43bSJ. Bruce Fields __be32 status = 0; 2086345c2842SMi Jinlong 2087345c2842SMi Jinlong nfs4_lock_state(); 2088345c2842SMi Jinlong unconf = find_unconfirmed_client(&dc->clientid); 2089345c2842SMi Jinlong conf = find_confirmed_client(&dc->clientid); 2090345c2842SMi Jinlong 2091345c2842SMi Jinlong if (conf) { 2092345c2842SMi Jinlong clp = conf; 2093345c2842SMi Jinlong 20946eccece9SJ. Bruce Fields if (!is_client_expired(conf) && client_has_state(conf)) { 2095345c2842SMi Jinlong status = nfserr_clientid_busy; 2096345c2842SMi Jinlong goto out; 2097345c2842SMi Jinlong } 2098345c2842SMi Jinlong 2099345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2100345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2101345c2842SMi Jinlong status = nfserr_clientid_busy; 2102345c2842SMi Jinlong goto out; 2103345c2842SMi Jinlong } 2104345c2842SMi Jinlong } else if (unconf) 2105345c2842SMi Jinlong clp = unconf; 2106345c2842SMi Jinlong else { 2107345c2842SMi Jinlong status = nfserr_stale_clientid; 2108345c2842SMi Jinlong goto out; 2109345c2842SMi Jinlong } 2110345c2842SMi Jinlong 2111345c2842SMi Jinlong expire_client(clp); 2112345c2842SMi Jinlong out: 2113345c2842SMi Jinlong nfs4_unlock_state(); 2114345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2115345c2842SMi Jinlong return status; 2116345c2842SMi Jinlong } 2117345c2842SMi Jinlong 2118069b6ad4SAndy Adamson __be32 21194dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 21204dc6ec00SJ. Bruce Fields { 212157b7b43bSJ. Bruce Fields __be32 status = 0; 2122bcecf1ccSMi Jinlong 21234dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 21244dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 21254dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 21264dc6ec00SJ. Bruce Fields /* 21274dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 21284dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 21294dc6ec00SJ. Bruce Fields */ 21304dc6ec00SJ. Bruce Fields return nfs_ok; 21314dc6ec00SJ. Bruce Fields } 2132bcecf1ccSMi Jinlong 21334dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2134bcecf1ccSMi Jinlong status = nfserr_complete_already; 2135a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2136a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2137bcecf1ccSMi Jinlong goto out; 2138bcecf1ccSMi Jinlong 2139bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2140bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 21414dc6ec00SJ. Bruce Fields /* 21424dc6ec00SJ. Bruce Fields * The following error isn't really legal. 21434dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 21444dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 21454dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 21464dc6ec00SJ. Bruce Fields * client. 21474dc6ec00SJ. Bruce Fields */ 2148bcecf1ccSMi Jinlong goto out; 2149bcecf1ccSMi Jinlong 2150bcecf1ccSMi Jinlong status = nfs_ok; 21512a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2152bcecf1ccSMi Jinlong out: 21534dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2154bcecf1ccSMi Jinlong return status; 21554dc6ec00SJ. Bruce Fields } 21564dc6ec00SJ. Bruce Fields 21574dc6ec00SJ. Bruce Fields __be32 2158b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2159b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 21601da177e4SLinus Torvalds { 2161a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 21621da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 21631da177e4SLinus Torvalds unsigned int strhashval; 216428ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2165b37ad28bSAl Viro __be32 status; 2166a55370a3SNeilBrown char dname[HEXDIR_LEN]; 21671da177e4SLinus Torvalds 2168a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2169a55370a3SNeilBrown if (status) 217073aea4ecSNeil Brown return status; 2171a55370a3SNeilBrown 2172a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 21731da177e4SLinus Torvalds 217463db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 21751da177e4SLinus Torvalds nfs4_lock_state(); 2176e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 217728ce6054SNeilBrown if (conf) { 217863db4632SJ. Bruce Fields /* case 0: */ 21791da177e4SLinus Torvalds status = nfserr_clid_inuse; 2180e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2181e203d506SJ. Bruce Fields goto out; 2182026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2183363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2184363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2185363168b4SJeff Layton sizeof(addr_str)); 2186026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2187363168b4SJeff Layton "at %s\n", addr_str); 21881da177e4SLinus Torvalds goto out; 21891da177e4SLinus Torvalds } 21901da177e4SLinus Torvalds } 2191e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 21921da177e4SLinus Torvalds if (unconf) 21931da177e4SLinus Torvalds expire_client(unconf); 21948f930711SJ. Bruce Fields status = nfserr_jukebox; 2195b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2196a55370a3SNeilBrown if (new == NULL) 21971da177e4SLinus Torvalds goto out; 219834b232bbSJ. Bruce Fields if (conf && same_verf(&conf->cl_verifier, &clverifier)) 219963db4632SJ. Bruce Fields /* case 1: probable callback update */ 22001da177e4SLinus Torvalds copy_clid(new, conf); 220134b232bbSJ. Bruce Fields else /* case 4 (new client) or cases 2, 3 (client reboot): */ 22021da177e4SLinus Torvalds gen_clid(new); 22038323c3b2SJ. Bruce Fields /* 22048323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 22058323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 22068323c3b2SJ. Bruce Fields */ 22078323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 22086f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2209c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 22101da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 22111da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 22121da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22131da177e4SLinus Torvalds status = nfs_ok; 22141da177e4SLinus Torvalds out: 22151da177e4SLinus Torvalds nfs4_unlock_state(); 22161da177e4SLinus Torvalds return status; 22171da177e4SLinus Torvalds } 22181da177e4SLinus Torvalds 22191da177e4SLinus Torvalds 2220b37ad28bSAl Viro __be32 2221b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2222b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2223b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22241da177e4SLinus Torvalds { 222521ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22261da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22271da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2228b37ad28bSAl Viro __be32 status; 22292c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 22301da177e4SLinus Torvalds 22312c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 22321da177e4SLinus Torvalds return nfserr_stale_clientid; 22331da177e4SLinus Torvalds nfs4_lock_state(); 223421ab45a4SNeilBrown 223521ab45a4SNeilBrown conf = find_confirmed_client(clid); 223621ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 2237a186e767SJ. Bruce Fields /* 22388695b90aSJ. Bruce Fields * We try hard to give out unique clientid's, so if we get an 22398695b90aSJ. Bruce Fields * attempt to confirm the same clientid with a different cred, 22408695b90aSJ. Bruce Fields * there's a bug somewhere. Let's charitably assume it's our 22418695b90aSJ. Bruce Fields * bug. 2242a186e767SJ. Bruce Fields */ 22438695b90aSJ. Bruce Fields status = nfserr_serverfault; 22448695b90aSJ. Bruce Fields if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) 22458695b90aSJ. Bruce Fields goto out; 22468695b90aSJ. Bruce Fields if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22478695b90aSJ. Bruce Fields goto out; 224863db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 224990d700b7SJ. Bruce Fields if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { 225090d700b7SJ. Bruce Fields if (conf && !unconf) /* case 2: probable retransmit */ 225190d700b7SJ. Bruce Fields status = nfs_ok; 225290d700b7SJ. Bruce Fields else /* case 4: client hasn't noticed we rebooted yet? */ 225390d700b7SJ. Bruce Fields status = nfserr_stale_clientid; 225490d700b7SJ. Bruce Fields goto out; 225590d700b7SJ. Bruce Fields } 225690d700b7SJ. Bruce Fields status = nfs_ok; 225790d700b7SJ. Bruce Fields if (conf) { /* case 1: callback update */ 22585a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22595a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22601a69c179SNeilBrown expire_client(unconf); 226190d700b7SJ. Bruce Fields } else { /* case 3: normal case; new or rebooted client */ 22628695b90aSJ. Bruce Fields unsigned int hash = clientstr_hashval(unconf->cl_recdir); 22631a69c179SNeilBrown 22648695b90aSJ. Bruce Fields conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); 22651a69c179SNeilBrown if (conf) { 22662a4317c5SJeff Layton nfsd4_client_record_remove(conf); 22671a69c179SNeilBrown expire_client(conf); 22681a69c179SNeilBrown } 22691da177e4SLinus Torvalds move_to_confirmed(unconf); 2270f3d03b92SJ. Bruce Fields nfsd4_probe_callback(unconf); 227108e8987cSNeilBrown } 22721da177e4SLinus Torvalds out: 22731da177e4SLinus Torvalds nfs4_unlock_state(); 22741da177e4SLinus Torvalds return status; 22751da177e4SLinus Torvalds } 22761da177e4SLinus Torvalds 227732513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 22781da177e4SLinus Torvalds { 227932513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 228032513b40SJ. Bruce Fields } 228132513b40SJ. Bruce Fields 228232513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 228332513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 228432513b40SJ. Bruce Fields { 22851da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 22861da177e4SLinus Torvalds 22878b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 22881da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 22898beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 22908beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 22911da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 229247f9940cSMeelap Shah fp->fi_had_conflict = false; 2293acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2294f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2295f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 229647cee541SPavel Emelyanov spin_lock(&recall_lock); 229747cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 229847cee541SPavel Emelyanov spin_unlock(&recall_lock); 22991da177e4SLinus Torvalds } 23001da177e4SLinus Torvalds 23011da177e4SLinus Torvalds static void 2302e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2303e60d4398SNeilBrown { 2304e60d4398SNeilBrown if (*slab == NULL) 2305e60d4398SNeilBrown return; 23061a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2307e60d4398SNeilBrown *slab = NULL; 2308e60d4398SNeilBrown } 2309e60d4398SNeilBrown 2310e8ff2a84SJ. Bruce Fields void 2311e60d4398SNeilBrown nfsd4_free_slabs(void) 2312e60d4398SNeilBrown { 2313fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2314fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2315e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23165ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23175b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2318e60d4398SNeilBrown } 23191da177e4SLinus Torvalds 232072083396SBryan Schumaker int 23211da177e4SLinus Torvalds nfsd4_init_slabs(void) 23221da177e4SLinus Torvalds { 2323fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2324fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2325fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2326fe0750e5SJ. Bruce Fields goto out_nomem; 2327fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2328fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2329fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2330e60d4398SNeilBrown goto out_nomem; 2331e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 233220c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2333e60d4398SNeilBrown if (file_slab == NULL) 2334e60d4398SNeilBrown goto out_nomem; 23355ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2336dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23375ac049acSNeilBrown if (stateid_slab == NULL) 23385ac049acSNeilBrown goto out_nomem; 23395b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 234020c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23415b2d21c1SNeilBrown if (deleg_slab == NULL) 23425b2d21c1SNeilBrown goto out_nomem; 2343e60d4398SNeilBrown return 0; 2344e60d4398SNeilBrown out_nomem: 2345e60d4398SNeilBrown nfsd4_free_slabs(); 23461da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23471da177e4SLinus Torvalds return -ENOMEM; 23481da177e4SLinus Torvalds } 23491da177e4SLinus Torvalds 2350fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23511da177e4SLinus Torvalds { 2352fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2353fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2354fe0750e5SJ. Bruce Fields } 2355fe0750e5SJ. Bruce Fields 2356fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2357fe0750e5SJ. Bruce Fields { 2358fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2359fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23601da177e4SLinus Torvalds } 23611da177e4SLinus Torvalds 2362ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2363ff194bd9SJ. Bruce Fields { 2364ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2365ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2366ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2367ff194bd9SJ. Bruce Fields } 2368ff194bd9SJ. Bruce Fields 2369fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 23701da177e4SLinus Torvalds { 23711da177e4SLinus Torvalds struct nfs4_stateowner *sop; 23721da177e4SLinus Torvalds 2373fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2374ff194bd9SJ. Bruce Fields if (!sop) 2375ff194bd9SJ. Bruce Fields return NULL; 2376ff194bd9SJ. Bruce Fields 2377ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2378ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2379fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2380ff194bd9SJ. Bruce Fields return NULL; 2381ff194bd9SJ. Bruce Fields } 23821da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2383ff194bd9SJ. Bruce Fields 2384ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2385ff194bd9SJ. Bruce Fields sop->so_client = clp; 2386ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 23871da177e4SLinus Torvalds return sop; 23881da177e4SLinus Torvalds } 2389ff194bd9SJ. Bruce Fields 2390fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2391ff194bd9SJ. Bruce Fields { 239216bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2393fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 23941da177e4SLinus Torvalds } 23951da177e4SLinus Torvalds 2396fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 23971da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2398fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 23991da177e4SLinus Torvalds 2400fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2401fe0750e5SJ. Bruce Fields if (!oo) 24021da177e4SLinus Torvalds return NULL; 2403fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2404fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2405d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2406fe0750e5SJ. Bruce Fields oo->oo_time = 0; 240738c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2408fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2409fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2410fe0750e5SJ. Bruce Fields return oo; 24111da177e4SLinus Torvalds } 24121da177e4SLinus Torvalds 2413996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2414fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2415d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24161da177e4SLinus Torvalds 2417996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2418ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2419fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24208beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2421fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 242213cd2184SNeilBrown get_nfs4_file(fp); 24231da177e4SLinus Torvalds stp->st_file = fp; 24241da177e4SLinus Torvalds stp->st_access_bmap = 0; 24251da177e4SLinus Torvalds stp->st_deny_bmap = 0; 242682c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2427ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 24284c4cd222SNeilBrown stp->st_openstp = NULL; 24291da177e4SLinus Torvalds } 24301da177e4SLinus Torvalds 24311da177e4SLinus Torvalds static void 2432fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24331da177e4SLinus Torvalds { 2434fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24351da177e4SLinus Torvalds 2436fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2437fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24381da177e4SLinus Torvalds } 24391da177e4SLinus Torvalds 24401da177e4SLinus Torvalds static int 2441599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2442599e0a22SJ. Bruce Fields clientid_t *clid) 2443599e0a22SJ. Bruce Fields { 2444599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2445599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2446599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24471da177e4SLinus Torvalds } 24481da177e4SLinus Torvalds 2449fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24501da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 24511da177e4SLinus Torvalds { 2452a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2453a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 24541da177e4SLinus Torvalds 245516bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 245616bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 245716bfdaafSJ. Bruce Fields continue; 2458a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2459a50d2ad1SJ. Bruce Fields oo = openowner(so); 2460a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2461a50d2ad1SJ. Bruce Fields return oo; 2462a50d2ad1SJ. Bruce Fields } 24631da177e4SLinus Torvalds } 24641da177e4SLinus Torvalds return NULL; 24651da177e4SLinus Torvalds } 24661da177e4SLinus Torvalds 24671da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 24681da177e4SLinus Torvalds static struct nfs4_file * 24691da177e4SLinus Torvalds find_file(struct inode *ino) 24701da177e4SLinus Torvalds { 24711da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 24721da177e4SLinus Torvalds struct nfs4_file *fp; 24731da177e4SLinus Torvalds 24748b671b80SJ. Bruce Fields spin_lock(&recall_lock); 24751da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 247613cd2184SNeilBrown if (fp->fi_inode == ino) { 247713cd2184SNeilBrown get_nfs4_file(fp); 24788b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24791da177e4SLinus Torvalds return fp; 24801da177e4SLinus Torvalds } 248113cd2184SNeilBrown } 24828b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24831da177e4SLinus Torvalds return NULL; 24841da177e4SLinus Torvalds } 24851da177e4SLinus Torvalds 24864f83aa30SJ. Bruce Fields /* 24871da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 24881da177e4SLinus Torvalds * WRITE with all zero or all one stateid 24891da177e4SLinus Torvalds */ 2490b37ad28bSAl Viro static __be32 24911da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 24921da177e4SLinus Torvalds { 24931da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 24941da177e4SLinus Torvalds struct nfs4_file *fp; 2495dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2496b37ad28bSAl Viro __be32 ret; 24971da177e4SLinus Torvalds 24981da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 24991da177e4SLinus Torvalds 25001da177e4SLinus Torvalds fp = find_file(ino); 250113cd2184SNeilBrown if (!fp) 250213cd2184SNeilBrown return nfs_ok; 2503b700949bSNeilBrown ret = nfserr_locked; 25041da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25058beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2506ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2507ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 250813cd2184SNeilBrown goto out; 25091da177e4SLinus Torvalds } 251013cd2184SNeilBrown ret = nfs_ok; 251113cd2184SNeilBrown out: 251213cd2184SNeilBrown put_nfs4_file(fp); 251313cd2184SNeilBrown return ret; 25141da177e4SLinus Torvalds } 25151da177e4SLinus Torvalds 25166b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25171da177e4SLinus Torvalds { 25181da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25191da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25201da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25211da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25221da177e4SLinus Torvalds * it's safe to take a reference: */ 25231da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25241da177e4SLinus Torvalds 25251da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25261da177e4SLinus Torvalds 2527460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25281da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25291da177e4SLinus Torvalds 25306b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25316b57d9c8SJ. Bruce Fields } 25326b57d9c8SJ. Bruce Fields 2533acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25346b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25356b57d9c8SJ. Bruce Fields { 2536acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2537acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25386b57d9c8SJ. Bruce Fields 2539acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2540acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2541acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 25420272e1fdSJ. Bruce Fields /* 25430272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2544acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25456b57d9c8SJ. Bruce Fields * in time: 25460272e1fdSJ. Bruce Fields */ 25470272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25481da177e4SLinus Torvalds 25495d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2550acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2551acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25525d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 25535d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 25541da177e4SLinus Torvalds } 25551da177e4SLinus Torvalds 25561da177e4SLinus Torvalds static 25571da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 25581da177e4SLinus Torvalds { 25591da177e4SLinus Torvalds if (arg & F_UNLCK) 25601da177e4SLinus Torvalds return lease_modify(onlist, arg); 25611da177e4SLinus Torvalds else 25621da177e4SLinus Torvalds return -EAGAIN; 25631da177e4SLinus Torvalds } 25641da177e4SLinus Torvalds 25657b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 25668fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 25678fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 25681da177e4SLinus Torvalds }; 25691da177e4SLinus Torvalds 25707a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 25717a8711c9SJ. Bruce Fields { 25727a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 25737a8711c9SJ. Bruce Fields return nfs_ok; 25747a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 25757a8711c9SJ. Bruce Fields return nfserr_replay_me; 25767a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 25777a8711c9SJ. Bruce Fields return nfs_ok; 25787a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 25797a8711c9SJ. Bruce Fields } 25801da177e4SLinus Torvalds 2581b37ad28bSAl Viro __be32 25826668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 25836668958fSAndy Adamson struct nfsd4_open *open) 25841da177e4SLinus Torvalds { 25851da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 25861da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 25871da177e4SLinus Torvalds unsigned int strhashval; 2588fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 25894cdc951bSJ. Bruce Fields __be32 status; 25902c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 25911da177e4SLinus Torvalds 25922c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&open->op_clientid, nn)) 25931da177e4SLinus Torvalds return nfserr_stale_clientid; 259432513b40SJ. Bruce Fields /* 259532513b40SJ. Bruce Fields * In case we need it later, after we've already created the 259632513b40SJ. Bruce Fields * file and don't want to risk a further failure: 259732513b40SJ. Bruce Fields */ 259832513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 259932513b40SJ. Bruce Fields if (open->op_file == NULL) 260032513b40SJ. Bruce Fields return nfserr_jukebox; 26011da177e4SLinus Torvalds 260216bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2603fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2604fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2605fe0750e5SJ. Bruce Fields if (!oo) { 26060f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 26070f442aa2SJ. Bruce Fields if (clp == NULL) 26080f442aa2SJ. Bruce Fields return nfserr_expired; 2609bcf130f9SJ. Bruce Fields goto new_owner; 26100f442aa2SJ. Bruce Fields } 2611dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26120f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2613fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2614fe0750e5SJ. Bruce Fields release_openowner(oo); 2615fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2616bcf130f9SJ. Bruce Fields goto new_owner; 26170f442aa2SJ. Bruce Fields } 26184cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26194cdc951bSJ. Bruce Fields if (status) 26204cdc951bSJ. Bruce Fields return status; 26214cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26224cdc951bSJ. Bruce Fields goto alloc_stateid; 2623bcf130f9SJ. Bruce Fields new_owner: 2624fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2625fe0750e5SJ. Bruce Fields if (oo == NULL) 26263e772463SJ. Bruce Fields return nfserr_jukebox; 2627fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26284cdc951bSJ. Bruce Fields alloc_stateid: 26294cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26304cdc951bSJ. Bruce Fields if (!open->op_stp) 26314cdc951bSJ. Bruce Fields return nfserr_jukebox; 26320f442aa2SJ. Bruce Fields return nfs_ok; 26331da177e4SLinus Torvalds } 26341da177e4SLinus Torvalds 2635b37ad28bSAl Viro static inline __be32 26364a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26374a6e43e6SNeilBrown { 26384a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26394a6e43e6SNeilBrown return nfserr_openmode; 26404a6e43e6SNeilBrown else 26414a6e43e6SNeilBrown return nfs_ok; 26424a6e43e6SNeilBrown } 26434a6e43e6SNeilBrown 2644c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 264524a0111eSJ. Bruce Fields { 264624a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 264724a0111eSJ. Bruce Fields } 264824a0111eSJ. Bruce Fields 264938c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2650f459e453SJ. Bruce Fields { 2651f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2652f459e453SJ. Bruce Fields 265338c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2654f459e453SJ. Bruce Fields if (!ret) 2655f459e453SJ. Bruce Fields return NULL; 2656f459e453SJ. Bruce Fields return delegstateid(ret); 2657f459e453SJ. Bruce Fields } 2658f459e453SJ. Bruce Fields 26598b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26608b289b2cSJ. Bruce Fields { 26618b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 26628b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 26638b289b2cSJ. Bruce Fields } 26648b289b2cSJ. Bruce Fields 2665b37ad28bSAl Viro static __be32 266638c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2667567d9829SNeilBrown struct nfs4_delegation **dp) 2668567d9829SNeilBrown { 2669567d9829SNeilBrown int flags; 2670b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2671567d9829SNeilBrown 267238c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2673567d9829SNeilBrown if (*dp == NULL) 2674c44c5eebSNeilBrown goto out; 267524a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2676567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2677567d9829SNeilBrown if (status) 2678567d9829SNeilBrown *dp = NULL; 2679c44c5eebSNeilBrown out: 26808b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2681c44c5eebSNeilBrown return nfs_ok; 2682c44c5eebSNeilBrown if (status) 2683c44c5eebSNeilBrown return status; 2684dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2685c44c5eebSNeilBrown return nfs_ok; 2686567d9829SNeilBrown } 2687567d9829SNeilBrown 2688b37ad28bSAl Viro static __be32 2689dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 26901da177e4SLinus Torvalds { 2691dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2692fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 26931da177e4SLinus Torvalds 26948beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 26951da177e4SLinus Torvalds /* ignore lock owners */ 26961da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 26971da177e4SLinus Torvalds continue; 26981da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2699fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 27001da177e4SLinus Torvalds *stpp = local; 27011da177e4SLinus Torvalds /* check for conflicting share reservations */ 27021da177e4SLinus Torvalds if (!test_share(local, open)) 270377eaae8dSJ. Bruce Fields return nfserr_share_denied; 27041da177e4SLinus Torvalds } 270577eaae8dSJ. Bruce Fields return nfs_ok; 27061da177e4SLinus Torvalds } 27071da177e4SLinus Torvalds 2708996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2709996e0938SJ. Bruce Fields { 2710996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 27115ac049acSNeilBrown } 27125ac049acSNeilBrown 271321fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 271421fb4016SJ. Bruce Fields { 271521fb4016SJ. Bruce Fields int flags = 0; 271621fb4016SJ. Bruce Fields 271721fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 271821fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 271921fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 272021fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 272121fb4016SJ. Bruce Fields return flags; 272221fb4016SJ. Bruce Fields } 272321fb4016SJ. Bruce Fields 27240c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27250c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2726f9d7562fSJ. Bruce Fields { 2727f9d7562fSJ. Bruce Fields __be32 status; 27280c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27290c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27300c12eaffSCasey Bodley 2731f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2732f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2733f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2734f9d7562fSJ. Bruce Fields if (status) 2735f9d7562fSJ. Bruce Fields return status; 2736f9d7562fSJ. Bruce Fields } 2737f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2738f9d7562fSJ. Bruce Fields 2739f9d7562fSJ. Bruce Fields return nfs_ok; 2740f9d7562fSJ. Bruce Fields } 2741f9d7562fSJ. Bruce Fields 2742b37ad28bSAl Viro static inline __be32 27431da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27441da177e4SLinus Torvalds struct nfsd4_open *open) 27451da177e4SLinus Torvalds { 27461da177e4SLinus Torvalds struct iattr iattr = { 27471da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27481da177e4SLinus Torvalds .ia_size = 0, 27491da177e4SLinus Torvalds }; 27501da177e4SLinus Torvalds if (!open->op_truncate) 27511da177e4SLinus Torvalds return 0; 27521da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27539246585aSAl Viro return nfserr_inval; 27541da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27551da177e4SLinus Torvalds } 27561da177e4SLinus Torvalds 2757b37ad28bSAl Viro static __be32 2758dcef0413SJ. 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) 27591da177e4SLinus Torvalds { 2760b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27617d947842SJ. Bruce Fields bool new_access; 2762b37ad28bSAl Viro __be32 status; 27631da177e4SLinus Torvalds 276482c5ff1bSJeff Layton new_access = !test_access(op_share_access, stp); 2765f9d7562fSJ. Bruce Fields if (new_access) { 27660c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2767f9d7562fSJ. Bruce Fields if (status) 2768f9d7562fSJ. Bruce Fields return status; 27696c26d08fSJ. Bruce Fields } 27701da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 27711da177e4SLinus Torvalds if (status) { 2772f9d7562fSJ. Bruce Fields if (new_access) { 2773f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2774f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2775f9d7562fSJ. Bruce Fields } 27761da177e4SLinus Torvalds return status; 27771da177e4SLinus Torvalds } 27781da177e4SLinus Torvalds /* remember the open */ 277982c5ff1bSJeff Layton set_access(op_share_access, stp); 2780ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 27811da177e4SLinus Torvalds 27821da177e4SLinus Torvalds return nfs_ok; 27831da177e4SLinus Torvalds } 27841da177e4SLinus Torvalds 27851da177e4SLinus Torvalds 27861da177e4SLinus Torvalds static void 27871255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 27881da177e4SLinus Torvalds { 2789dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 27901da177e4SLinus Torvalds } 27911da177e4SLinus Torvalds 279214a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 279314a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 279414a24e99SJ. Bruce Fields { 279514a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 279614a24e99SJ. Bruce Fields return true; 279714a24e99SJ. Bruce Fields /* 279814a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 279914a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 280014a24e99SJ. Bruce Fields * until we hear otherwise: 280114a24e99SJ. Bruce Fields */ 280214a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 280314a24e99SJ. Bruce Fields } 280414a24e99SJ. Bruce Fields 280522d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 280622d38c4cSJ. Bruce Fields { 280722d38c4cSJ. Bruce Fields struct file_lock *fl; 280822d38c4cSJ. Bruce Fields 280922d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 281022d38c4cSJ. Bruce Fields if (!fl) 281122d38c4cSJ. Bruce Fields return NULL; 281222d38c4cSJ. Bruce Fields locks_init_lock(fl); 281322d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 281422d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 281522d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 281622d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2817acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 281822d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 281922d38c4cSJ. Bruce Fields return fl; 282022d38c4cSJ. Bruce Fields } 282122d38c4cSJ. Bruce Fields 2822edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2823edab9782SJ. Bruce Fields { 2824acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2825edab9782SJ. Bruce Fields struct file_lock *fl; 2826edab9782SJ. Bruce Fields int status; 2827edab9782SJ. Bruce Fields 2828edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2829edab9782SJ. Bruce Fields if (!fl) 2830edab9782SJ. Bruce Fields return -ENOMEM; 2831acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28322a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2833acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2834edab9782SJ. Bruce Fields if (status) { 2835acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2836edab9782SJ. Bruce Fields locks_free_lock(fl); 2837edab9782SJ. Bruce Fields return -ENOMEM; 2838edab9782SJ. Bruce Fields } 2839acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2840acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2841acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2842acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2843acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2844acfdf5c3SJ. Bruce Fields return 0; 2845acfdf5c3SJ. Bruce Fields } 2846acfdf5c3SJ. Bruce Fields 2847acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2848acfdf5c3SJ. Bruce Fields { 2849acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2850acfdf5c3SJ. Bruce Fields 2851acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2852acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2853acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2854acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2855acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2856acfdf5c3SJ. Bruce Fields return -EAGAIN; 2857acfdf5c3SJ. Bruce Fields } 2858acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2859acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2860acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28612a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2862edab9782SJ. Bruce Fields return 0; 2863edab9782SJ. Bruce Fields } 2864edab9782SJ. Bruce Fields 28654aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 28664aa8913cSBenny Halevy { 28674aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 28684aa8913cSBenny Halevy if (status == -EAGAIN) 28694aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 28704aa8913cSBenny Halevy else { 28714aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 28724aa8913cSBenny Halevy switch (open->op_deleg_want) { 28734aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 28744aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 28754aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 28764aa8913cSBenny Halevy break; 28774aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 28784aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 28794aa8913cSBenny Halevy break; 28804aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 28814aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 28824aa8913cSBenny Halevy } 28834aa8913cSBenny Halevy } 28844aa8913cSBenny Halevy } 28854aa8913cSBenny Halevy 28861da177e4SLinus Torvalds /* 28871da177e4SLinus Torvalds * Attempt to hand out a delegation. 28881da177e4SLinus Torvalds */ 28891da177e4SLinus Torvalds static void 28905ccb0066SStanislav Kinsbursky nfs4_open_delegation(struct net *net, struct svc_fh *fh, 28915ccb0066SStanislav Kinsbursky struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 28921da177e4SLinus Torvalds { 28931da177e4SLinus Torvalds struct nfs4_delegation *dp; 2894fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 289514a24e99SJ. Bruce Fields int cb_up; 2896d24433cdSBenny Halevy int status = 0, flag = 0; 28971da177e4SLinus Torvalds 2898fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 28991da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 29007b190fecSNeilBrown open->op_recall = 0; 29017b190fecSNeilBrown switch (open->op_claim_type) { 29027b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29032bf23875SJ. Bruce Fields if (!cb_up) 29047b190fecSNeilBrown open->op_recall = 1; 29057b190fecSNeilBrown flag = open->op_delegate_type; 29067b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29071da177e4SLinus Torvalds goto out; 29087b190fecSNeilBrown break; 29097b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29107b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29117b190fecSNeilBrown * had the chance to reclaim theirs.... */ 29125ccb0066SStanislav Kinsbursky if (locks_in_grace(net)) 29137b190fecSNeilBrown goto out; 2914dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29157b190fecSNeilBrown goto out; 29161da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29171da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29181da177e4SLinus Torvalds else 29191da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29207b190fecSNeilBrown break; 29217b190fecSNeilBrown default: 29227b190fecSNeilBrown goto out; 29237b190fecSNeilBrown } 29241da177e4SLinus Torvalds 2925fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2926dd239cc0SJ. Bruce Fields if (dp == NULL) 2927dd239cc0SJ. Bruce Fields goto out_no_deleg; 2928acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2929edab9782SJ. Bruce Fields if (status) 2930dd239cc0SJ. Bruce Fields goto out_free; 29311da177e4SLinus Torvalds 2932d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29331da177e4SLinus Torvalds 29348c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2935d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29361da177e4SLinus Torvalds out: 29371da177e4SLinus Torvalds open->op_delegate_type = flag; 2938d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2939d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2940d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2941d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2942d24433cdSBenny Halevy 29434aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29444aa8913cSBenny Halevy if (open->op_deleg_want) 29454aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2946d24433cdSBenny Halevy } 2947dd239cc0SJ. Bruce Fields return; 2948dd239cc0SJ. Bruce Fields out_free: 2949acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2950dd239cc0SJ. Bruce Fields out_no_deleg: 2951dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2952dd239cc0SJ. Bruce Fields goto out; 29531da177e4SLinus Torvalds } 29541da177e4SLinus Torvalds 2955e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 2956e27f49c3SBenny Halevy struct nfs4_delegation *dp) 2957e27f49c3SBenny Halevy { 2958e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 2959e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2960e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2961e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 2962e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 2963e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2964e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2965e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 2966e27f49c3SBenny Halevy } 2967e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 2968e27f49c3SBenny Halevy * it already has, therefore we don't return 2969e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 2970e27f49c3SBenny Halevy */ 2971e27f49c3SBenny Halevy } 2972e27f49c3SBenny Halevy 29731da177e4SLinus Torvalds /* 29741da177e4SLinus Torvalds * called with nfs4_lock_state() held. 29751da177e4SLinus Torvalds */ 2976b37ad28bSAl Viro __be32 29771da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 29781da177e4SLinus Torvalds { 29796668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 298038c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 29811da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 29821da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2983dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 2984567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2985b37ad28bSAl Viro __be32 status; 29861da177e4SLinus Torvalds 29871da177e4SLinus Torvalds /* 29881da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 29891da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 29901da177e4SLinus Torvalds * If not found, create the nfs4_file struct 29911da177e4SLinus Torvalds */ 29921da177e4SLinus Torvalds fp = find_file(ino); 29931da177e4SLinus Torvalds if (fp) { 29941da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 29951da177e4SLinus Torvalds goto out; 299638c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 2997c44c5eebSNeilBrown if (status) 2998c44c5eebSNeilBrown goto out; 29991da177e4SLinus Torvalds } else { 3000c44c5eebSNeilBrown status = nfserr_bad_stateid; 30018b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3002c44c5eebSNeilBrown goto out; 30033e772463SJ. Bruce Fields status = nfserr_jukebox; 300432513b40SJ. Bruce Fields fp = open->op_file; 300532513b40SJ. Bruce Fields open->op_file = NULL; 300632513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30071da177e4SLinus Torvalds } 30081da177e4SLinus Torvalds 30091da177e4SLinus Torvalds /* 30101da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30111da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30121da177e4SLinus Torvalds */ 30131da177e4SLinus Torvalds if (stp) { 30141da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3015f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30161da177e4SLinus Torvalds if (status) 30171da177e4SLinus Torvalds goto out; 30181da177e4SLinus Torvalds } else { 30194cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3020567d9829SNeilBrown if (status) 30211da177e4SLinus Torvalds goto out; 30224af82504SJ. Bruce Fields status = nfsd4_truncate(rqstp, current_fh, open); 30234af82504SJ. Bruce Fields if (status) 30244af82504SJ. Bruce Fields goto out; 30254cdc951bSJ. Bruce Fields stp = open->op_stp; 30264cdc951bSJ. Bruce Fields open->op_stp = NULL; 3027996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30281da177e4SLinus Torvalds } 3029dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3030dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30311da177e4SLinus Torvalds 3032d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3033dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30346668958fSAndy Adamson 3035d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3036d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3037d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3038d24433cdSBenny Halevy goto nodeleg; 3039d24433cdSBenny Halevy } 3040d24433cdSBenny Halevy } 3041d24433cdSBenny Halevy 30421da177e4SLinus Torvalds /* 30431da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30441da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30451da177e4SLinus Torvalds */ 30465ccb0066SStanislav Kinsbursky nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); 3047d24433cdSBenny Halevy nodeleg: 30481da177e4SLinus Torvalds status = nfs_ok; 30491da177e4SLinus Torvalds 30508c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3051dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30521da177e4SLinus Torvalds out: 3053d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3054d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3055e27f49c3SBenny Halevy open->op_deleg_want) 3056e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3057d24433cdSBenny Halevy 305813cd2184SNeilBrown if (fp) 305913cd2184SNeilBrown put_nfs4_file(fp); 306037515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 30611255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 30621da177e4SLinus Torvalds /* 30631da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 30641da177e4SLinus Torvalds */ 30651da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3066dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 30676668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 30681da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 30691da177e4SLinus Torvalds 30701da177e4SLinus Torvalds return status; 30711da177e4SLinus Torvalds } 30721da177e4SLinus Torvalds 3073d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3074d29b20cdSJ. Bruce Fields { 3075d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3076d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3077d29b20cdSJ. Bruce Fields 3078d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3079d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3080d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3081d29b20cdSJ. Bruce Fields if (status) { 3082d29b20cdSJ. Bruce Fields release_openowner(oo); 3083d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3084d29b20cdSJ. Bruce Fields } else 3085d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3086d29b20cdSJ. Bruce Fields } 3087d29b20cdSJ. Bruce Fields } 308832513b40SJ. Bruce Fields if (open->op_file) 308932513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 30904cdc951bSJ. Bruce Fields if (open->op_stp) 30914cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3092d29b20cdSJ. Bruce Fields } 3093d29b20cdSJ. Bruce Fields 3094b37ad28bSAl Viro __be32 3095b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3096b591480bSJ.Bruce Fields clientid_t *clid) 30971da177e4SLinus Torvalds { 30981da177e4SLinus Torvalds struct nfs4_client *clp; 3099b37ad28bSAl Viro __be32 status; 31002c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 31011da177e4SLinus Torvalds 31021da177e4SLinus Torvalds nfs4_lock_state(); 31031da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31041da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31051da177e4SLinus Torvalds status = nfserr_stale_clientid; 31062c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 31071da177e4SLinus Torvalds goto out; 31081da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31091da177e4SLinus Torvalds status = nfserr_expired; 31101da177e4SLinus Torvalds if (clp == NULL) { 31111da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31121da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31131da177e4SLinus Torvalds goto out; 31141da177e4SLinus Torvalds } 31151da177e4SLinus Torvalds status = nfserr_cb_path_down; 3116ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 311777a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31181da177e4SLinus Torvalds goto out; 31191da177e4SLinus Torvalds status = nfs_ok; 31201da177e4SLinus Torvalds out: 31211da177e4SLinus Torvalds nfs4_unlock_state(); 31221da177e4SLinus Torvalds return status; 31231da177e4SLinus Torvalds } 31241da177e4SLinus Torvalds 3125a76b4319SNeilBrown static void 31265e1533c7SStanislav Kinsbursky nfsd4_end_grace(struct net *net) 3127a76b4319SNeilBrown { 31285e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 31295e1533c7SStanislav Kinsbursky 313033dcc481SJeff Layton /* do nothing if grace period already ended */ 3131a51c84edSStanislav Kinsbursky if (nn->grace_ended) 313233dcc481SJeff Layton return; 313333dcc481SJeff Layton 3134a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 3135a51c84edSStanislav Kinsbursky nn->grace_ended = true; 31362c142baaSStanislav Kinsbursky nfsd4_record_grace_done(net, nn->boot_time); 31375e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 3138e46b498cSJ. Bruce Fields /* 3139e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3140e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3141e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3142e46b498cSJ. Bruce Fields */ 3143e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3144a76b4319SNeilBrown } 3145a76b4319SNeilBrown 3146fd39ca9aSNeilBrown static time_t 31471da177e4SLinus Torvalds nfs4_laundromat(void) 31481da177e4SLinus Torvalds { 31491da177e4SLinus Torvalds struct nfs4_client *clp; 3150fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31511da177e4SLinus Torvalds struct nfs4_delegation *dp; 31521da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3153cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3154cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3155cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 31561da177e4SLinus Torvalds 31571da177e4SLinus Torvalds nfs4_lock_state(); 31581da177e4SLinus Torvalds 31591da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 31605e1533c7SStanislav Kinsbursky nfsd4_end_grace(&init_net); 316136acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 316236acb66bSBenny Halevy spin_lock(&client_lock); 31631da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 31641da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 31651da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 31661da177e4SLinus Torvalds t = clp->cl_time - cutoff; 31671da177e4SLinus Torvalds if (clientid_val > t) 31681da177e4SLinus Torvalds clientid_val = t; 31691da177e4SLinus Torvalds break; 31701da177e4SLinus Torvalds } 3171d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3172d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3173d7682988SBenny Halevy clp->cl_clientid.cl_id); 3174d7682988SBenny Halevy continue; 3175d7682988SBenny Halevy } 3176d7682988SBenny Halevy unhash_client_locked(clp); 3177d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 317836acb66bSBenny Halevy } 317936acb66bSBenny Halevy spin_unlock(&client_lock); 318036acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 318136acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 31821da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 31831da177e4SLinus Torvalds clp->cl_clientid.cl_id); 31842a4317c5SJeff Layton nfsd4_client_record_remove(clp); 31851da177e4SLinus Torvalds expire_client(clp); 31861da177e4SLinus Torvalds } 31871da177e4SLinus Torvalds spin_lock(&recall_lock); 31881da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 31891da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 31901da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 31911da177e4SLinus Torvalds u = dp->dl_time - cutoff; 31921da177e4SLinus Torvalds if (test_val > u) 31931da177e4SLinus Torvalds test_val = u; 31941da177e4SLinus Torvalds break; 31951da177e4SLinus Torvalds } 31961da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 31971da177e4SLinus Torvalds } 31981da177e4SLinus Torvalds spin_unlock(&recall_lock); 31991da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32001da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32011da177e4SLinus Torvalds unhash_delegation(dp); 32021da177e4SLinus Torvalds } 3203cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32041da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3205fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3206fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3207fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32081da177e4SLinus Torvalds if (test_val > u) 32091da177e4SLinus Torvalds test_val = u; 32101da177e4SLinus Torvalds break; 32111da177e4SLinus Torvalds } 3212fe0750e5SJ. Bruce Fields release_openowner(oo); 32131da177e4SLinus Torvalds } 32141da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32151da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32161da177e4SLinus Torvalds nfs4_unlock_state(); 32171da177e4SLinus Torvalds return clientid_val; 32181da177e4SLinus Torvalds } 32191da177e4SLinus Torvalds 3220a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3221a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3222a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3223a254b246SHarvey Harrison 3224a254b246SHarvey Harrison static void 3225c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32261da177e4SLinus Torvalds { 32271da177e4SLinus Torvalds time_t t; 32281da177e4SLinus Torvalds 32291da177e4SLinus Torvalds t = nfs4_laundromat(); 32301da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 323158da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32321da177e4SLinus Torvalds } 32331da177e4SLinus Torvalds 3234f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3235f8816512SNeilBrown { 3236f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3237f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3238f7a4d872SJ. Bruce Fields return nfs_ok; 32391da177e4SLinus Torvalds } 32401da177e4SLinus Torvalds 32411da177e4SLinus Torvalds static int 32422c142baaSStanislav Kinsbursky STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) 32431da177e4SLinus Torvalds { 32442c142baaSStanislav Kinsbursky if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) 3245e4e83ea4SJ. Bruce Fields return 0; 32468c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32478c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32481da177e4SLinus Torvalds return 1; 32491da177e4SLinus Torvalds } 32501da177e4SLinus Torvalds 32511da177e4SLinus Torvalds static inline int 325282c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 32531da177e4SLinus Torvalds { 325482c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 325582c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 325682c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 32571da177e4SLinus Torvalds } 32581da177e4SLinus Torvalds 32591da177e4SLinus Torvalds static inline int 326082c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 32611da177e4SLinus Torvalds { 326282c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 326382c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 32641da177e4SLinus Torvalds } 32651da177e4SLinus Torvalds 32661da177e4SLinus Torvalds static 3267dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 32681da177e4SLinus Torvalds { 3269b37ad28bSAl Viro __be32 status = nfserr_openmode; 32701da177e4SLinus Torvalds 327102921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 327202921914SJ. Bruce Fields if (stp->st_openstp) 327302921914SJ. Bruce Fields stp = stp->st_openstp; 327482c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 32751da177e4SLinus Torvalds goto out; 327682c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 32771da177e4SLinus Torvalds goto out; 32781da177e4SLinus Torvalds status = nfs_ok; 32791da177e4SLinus Torvalds out: 32801da177e4SLinus Torvalds return status; 32811da177e4SLinus Torvalds } 32821da177e4SLinus Torvalds 3283b37ad28bSAl Viro static inline __be32 32845ccb0066SStanislav Kinsbursky check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) 32851da177e4SLinus Torvalds { 3286203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 32871da177e4SLinus Torvalds return nfs_ok; 32885ccb0066SStanislav Kinsbursky else if (locks_in_grace(net)) { 328925985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 32901da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 32911da177e4SLinus Torvalds return nfserr_grace; 32921da177e4SLinus Torvalds } else if (flags & WR_STATE) 32931da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32941da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 32951da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 32961da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32971da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 32981da177e4SLinus Torvalds } 32991da177e4SLinus Torvalds 33001da177e4SLinus Torvalds /* 33011da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33021da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33031da177e4SLinus Torvalds */ 33041da177e4SLinus Torvalds static inline int 33055ccb0066SStanislav Kinsbursky grace_disallows_io(struct net *net, struct inode *inode) 33061da177e4SLinus Torvalds { 33075ccb0066SStanislav Kinsbursky return locks_in_grace(net) && mandatory_lock(inode); 33081da177e4SLinus Torvalds } 33091da177e4SLinus Torvalds 331081b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 331181b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 331281b82965SJ. Bruce Fields { 331381b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 331481b82965SJ. Bruce Fields } 331581b82965SJ. Bruce Fields 331657b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33170836f587SJ. Bruce Fields { 33186668958fSAndy Adamson /* 33196668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33206668958fSAndy Adamson * when it is zero. 33216668958fSAndy Adamson */ 332228dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 332381b82965SJ. Bruce Fields return nfs_ok; 332481b82965SJ. Bruce Fields 332581b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 332681b82965SJ. Bruce Fields return nfs_ok; 33276668958fSAndy Adamson 33280836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 332981b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33300836f587SJ. Bruce Fields return nfserr_bad_stateid; 33310836f587SJ. Bruce Fields /* 333281b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 333381b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 333481b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 333581b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 333681b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 333781b82965SJ. Bruce Fields * but better performance may result in retrying IO that 333881b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 333981b82965SJ. Bruce Fields * reordered in flight: 33400836f587SJ. Bruce Fields */ 33410836f587SJ. Bruce Fields return nfserr_old_stateid; 33420836f587SJ. Bruce Fields } 33430836f587SJ. Bruce Fields 33447df302f7SChuck Lever static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 334517456804SBryan Schumaker { 334697b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 334797b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 334897b7e3b6SJ. Bruce Fields __be32 status; 334917456804SBryan Schumaker 33507df302f7SChuck Lever if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 33517df302f7SChuck Lever return nfserr_bad_stateid; 33527df302f7SChuck Lever /* Client debugging aid. */ 33537df302f7SChuck Lever if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { 33547df302f7SChuck Lever char addr_str[INET6_ADDRSTRLEN]; 33557df302f7SChuck Lever rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, 33567df302f7SChuck Lever sizeof(addr_str)); 33577df302f7SChuck Lever pr_warn_ratelimited("NFSD: client %s testing state ID " 33587df302f7SChuck Lever "with incorrect client ID\n", addr_str); 33597df302f7SChuck Lever return nfserr_bad_stateid; 33607df302f7SChuck Lever } 336138c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 336297b7e3b6SJ. Bruce Fields if (!s) 33637df302f7SChuck Lever return nfserr_bad_stateid; 336436279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 336517456804SBryan Schumaker if (status) 336617456804SBryan Schumaker return status; 336797b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 336897b7e3b6SJ. Bruce Fields return nfs_ok; 336997b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 337097b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3371dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 337297b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 337397b7e3b6SJ. Bruce Fields return nfs_ok; 337417456804SBryan Schumaker } 337517456804SBryan Schumaker 337638c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 337738c2f4b1SJ. Bruce Fields { 337838c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 33792c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 338038c2f4b1SJ. Bruce Fields 338138c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 338238c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 33832c142baaSStanislav Kinsbursky if (STALE_STATEID(stateid, nn)) 338438c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 338538c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 338638c2f4b1SJ. Bruce Fields if (!cl) 338738c2f4b1SJ. Bruce Fields return nfserr_expired; 338838c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 338938c2f4b1SJ. Bruce Fields if (!*s) 339038c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 339138c2f4b1SJ. Bruce Fields return nfs_ok; 339238c2f4b1SJ. Bruce Fields 339338c2f4b1SJ. Bruce Fields } 339438c2f4b1SJ. Bruce Fields 33951da177e4SLinus Torvalds /* 33961da177e4SLinus Torvalds * Checks for stateid operations 33971da177e4SLinus Torvalds */ 3398b37ad28bSAl Viro __be32 33995ccb0066SStanislav Kinsbursky nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, 3400dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 34011da177e4SLinus Torvalds { 340269064a27SJ. Bruce Fields struct nfs4_stid *s; 3403dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34041da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3405dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34061da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3407b37ad28bSAl Viro __be32 status; 34081da177e4SLinus Torvalds 34091da177e4SLinus Torvalds if (filpp) 34101da177e4SLinus Torvalds *filpp = NULL; 34111da177e4SLinus Torvalds 34125ccb0066SStanislav Kinsbursky if (grace_disallows_io(net, ino)) 34131da177e4SLinus Torvalds return nfserr_grace; 34141da177e4SLinus Torvalds 34151da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34165ccb0066SStanislav Kinsbursky return check_special_stateids(net, current_fh, stateid, flags); 34171da177e4SLinus Torvalds 341838c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 341938c2f4b1SJ. Bruce Fields if (status) 342038c2f4b1SJ. Bruce Fields return status; 342169064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34220c2a498fSJ. Bruce Fields if (status) 34230c2a498fSJ. Bruce Fields goto out; 3424f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3425f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 342669064a27SJ. Bruce Fields dp = delegstateid(s); 3427dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3428dc9bf700SJ. Bruce Fields if (status) 3429dc9bf700SJ. Bruce Fields goto out; 343043b0178eSDan Carpenter if (filpp) { 3431acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3432f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 343343b0178eSDan Carpenter } 3434f7a4d872SJ. Bruce Fields break; 3435f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3436f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 343769064a27SJ. Bruce Fields stp = openlockstateid(s); 3438f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3439f7a4d872SJ. Bruce Fields if (status) 34401da177e4SLinus Torvalds goto out; 3441fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3442dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34431da177e4SLinus Torvalds goto out; 3444a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3445a4455be0SJ. Bruce Fields if (status) 34461da177e4SLinus Torvalds goto out; 3447f9d7562fSJ. Bruce Fields if (filpp) { 3448f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3449f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3450f9d7562fSJ. Bruce Fields else 3451f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3452f9d7562fSJ. Bruce Fields } 3453f7a4d872SJ. Bruce Fields break; 3454f7a4d872SJ. Bruce Fields default: 3455f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 34561da177e4SLinus Torvalds } 34571da177e4SLinus Torvalds status = nfs_ok; 34581da177e4SLinus Torvalds out: 34591da177e4SLinus Torvalds return status; 34601da177e4SLinus Torvalds } 34611da177e4SLinus Torvalds 3462e1ca12dfSBryan Schumaker static __be32 3463dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3464e1ca12dfSBryan Schumaker { 3465fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3466e1ca12dfSBryan Schumaker return nfserr_locks_held; 3467e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3468e1ca12dfSBryan Schumaker return nfs_ok; 3469e1ca12dfSBryan Schumaker } 3470e1ca12dfSBryan Schumaker 3471e1ca12dfSBryan Schumaker /* 347217456804SBryan Schumaker * Test if the stateid is valid 347317456804SBryan Schumaker */ 347417456804SBryan Schumaker __be32 347517456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 347617456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 347717456804SBryan Schumaker { 347803cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 347903cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 348003cfb420SBryan Schumaker 348103cfb420SBryan Schumaker nfs4_lock_state(); 348203cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 34837df302f7SChuck Lever stateid->ts_id_status = 34847df302f7SChuck Lever nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); 348503cfb420SBryan Schumaker nfs4_unlock_state(); 348603cfb420SBryan Schumaker 348717456804SBryan Schumaker return nfs_ok; 348817456804SBryan Schumaker } 348917456804SBryan Schumaker 3490e1ca12dfSBryan Schumaker __be32 3491e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3492e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3493e1ca12dfSBryan Schumaker { 3494e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 34952da1cec7SJ. Bruce Fields struct nfs4_stid *s; 349638c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 34972da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3498e1ca12dfSBryan Schumaker 3499e1ca12dfSBryan Schumaker nfs4_lock_state(); 350038c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 35012da1cec7SJ. Bruce Fields if (!s) 3502e1ca12dfSBryan Schumaker goto out; 35032da1cec7SJ. Bruce Fields switch (s->sc_type) { 35042da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3505e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3506e1ca12dfSBryan Schumaker goto out; 35072da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35082da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35092da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35102da1cec7SJ. Bruce Fields if (ret) 3511e1ca12dfSBryan Schumaker goto out; 35122da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35132da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35142da1cec7SJ. Bruce Fields else 35152da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3516f7a4d872SJ. Bruce Fields break; 3517f7a4d872SJ. Bruce Fields default: 3518f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3519e1ca12dfSBryan Schumaker } 3520e1ca12dfSBryan Schumaker out: 3521e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3522e1ca12dfSBryan Schumaker return ret; 3523e1ca12dfSBryan Schumaker } 3524e1ca12dfSBryan Schumaker 35254c4cd222SNeilBrown static inline int 35264c4cd222SNeilBrown setlkflg (int type) 35274c4cd222SNeilBrown { 35284c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35294c4cd222SNeilBrown RD_STATE : WR_STATE; 35304c4cd222SNeilBrown } 35311da177e4SLinus Torvalds 3532dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3533c0a5d93eSJ. Bruce Fields { 3534c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3535c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3536c0a5d93eSJ. Bruce Fields __be32 status; 3537c0a5d93eSJ. Bruce Fields 3538c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3539c0a5d93eSJ. Bruce Fields if (status) 3540c0a5d93eSJ. Bruce Fields return status; 3541f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3542f7a4d872SJ. Bruce Fields /* 3543f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3544f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3545f7a4d872SJ. Bruce Fields */ 3546f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3547f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3548f7a4d872SJ. Bruce Fields if (status) 3549f7a4d872SJ. Bruce Fields return status; 3550f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3551c0a5d93eSJ. Bruce Fields } 3552c0a5d93eSJ. Bruce Fields 35531da177e4SLinus Torvalds /* 35541da177e4SLinus Torvalds * Checks for sequence id mutating operations. 35551da177e4SLinus Torvalds */ 3556b37ad28bSAl Viro static __be32 3557dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 35582288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3559dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 35601da177e4SLinus Torvalds { 35610836f587SJ. Bruce Fields __be32 status; 356238c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 35631da177e4SLinus Torvalds 35648c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 35658c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 35661da177e4SLinus Torvalds 35671da177e4SLinus Torvalds *stpp = NULL; 356838c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3569c0a5d93eSJ. Bruce Fields if (status) 3570c0a5d93eSJ. Bruce Fields return status; 357138c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3572c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 35731da177e4SLinus Torvalds 3574c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 35751da177e4SLinus Torvalds } 35761da177e4SLinus Torvalds 3577dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3578c0a5d93eSJ. Bruce Fields { 3579c0a5d93eSJ. Bruce Fields __be32 status; 3580c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 35811da177e4SLinus Torvalds 3582c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 35832288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 35840836f587SJ. Bruce Fields if (status) 35850836f587SJ. Bruce Fields return status; 3586c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3587dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3588c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 35893a4f98bbSNeilBrown return nfs_ok; 35901da177e4SLinus Torvalds } 35911da177e4SLinus Torvalds 3592b37ad28bSAl Viro __be32 3593ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3594a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 35951da177e4SLinus Torvalds { 3596b37ad28bSAl Viro __be32 status; 3597fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3598dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 35991da177e4SLinus Torvalds 36001da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3601ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3602ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36031da177e4SLinus Torvalds 3604ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3605a8cddc5dSJ. Bruce Fields if (status) 3606a8cddc5dSJ. Bruce Fields return status; 36071da177e4SLinus Torvalds 36081da177e4SLinus Torvalds nfs4_lock_state(); 36091da177e4SLinus Torvalds 36109072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3611ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36122288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36139072d5c6SJ. Bruce Fields if (status) 36141da177e4SLinus Torvalds goto out; 3615fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 361668b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3617dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 361868b66e82SJ. Bruce Fields goto out; 3619dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3620dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3621dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36228c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3623dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3624c7b9a459SNeilBrown 36252a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 362668b66e82SJ. Bruce Fields status = nfs_ok; 36271da177e4SLinus Torvalds out: 36285ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36291da177e4SLinus Torvalds nfs4_unlock_state(); 36301da177e4SLinus Torvalds return status; 36311da177e4SLinus Torvalds } 36321da177e4SLinus Torvalds 36336409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36341da177e4SLinus Torvalds { 363582c5ff1bSJeff Layton if (!test_access(access, stp)) 36366409a5a6SJ. Bruce Fields return; 36376409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 363882c5ff1bSJeff Layton clear_access(access, stp); 3639f197c271SJ. Bruce Fields } 36406409a5a6SJ. Bruce Fields 36416409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36426409a5a6SJ. Bruce Fields { 36436409a5a6SJ. Bruce Fields switch (to_access) { 36446409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36456409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36466409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36476409a5a6SJ. Bruce Fields break; 36486409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36496409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36506409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36516409a5a6SJ. Bruce Fields break; 36526409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36536409a5a6SJ. Bruce Fields break; 36546409a5a6SJ. Bruce Fields default: 36556409a5a6SJ. Bruce Fields BUG(); 36561da177e4SLinus Torvalds } 36571da177e4SLinus Torvalds } 36581da177e4SLinus Torvalds 36591da177e4SLinus Torvalds static void 3660ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 36611da177e4SLinus Torvalds { 36621da177e4SLinus Torvalds int i; 36631da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 36641da177e4SLinus Torvalds if ((i & deny) != i) 3665ce0fc43cSJeff Layton clear_deny(i, stp); 36661da177e4SLinus Torvalds } 36671da177e4SLinus Torvalds } 36681da177e4SLinus Torvalds 3669b37ad28bSAl Viro __be32 3670ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3671ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3672a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 36731da177e4SLinus Torvalds { 3674b37ad28bSAl Viro __be32 status; 3675dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36761da177e4SLinus Torvalds 36771da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3678ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3679ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36801da177e4SLinus Torvalds 3681c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 36822c8bd7e0SBenny Halevy if (od->od_deleg_want) 36832c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 36842c8bd7e0SBenny Halevy od->od_deleg_want); 36851da177e4SLinus Torvalds 36861da177e4SLinus Torvalds nfs4_lock_state(); 3687c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3688c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 36899072d5c6SJ. Bruce Fields if (status) 36901da177e4SLinus Torvalds goto out; 36911da177e4SLinus Torvalds status = nfserr_inval; 369282c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 36931da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 36941da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 36951da177e4SLinus Torvalds goto out; 36961da177e4SLinus Torvalds } 3697ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 36981da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 36991da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 37001da177e4SLinus Torvalds goto out; 37011da177e4SLinus Torvalds } 37026409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37031da177e4SLinus Torvalds 3704ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 37051da177e4SLinus Torvalds 3706dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3707dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37081da177e4SLinus Torvalds status = nfs_ok; 37091da177e4SLinus Torvalds out: 37105ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37111da177e4SLinus Torvalds nfs4_unlock_state(); 37121da177e4SLinus Torvalds return status; 37131da177e4SLinus Torvalds } 37141da177e4SLinus Torvalds 371538c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 371638c387b5SJ. Bruce Fields { 371738c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 371838c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 371938c387b5SJ. Bruce Fields 372038c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 372138c387b5SJ. Bruce Fields return; 372238c387b5SJ. Bruce Fields oo = openowner(so); 372338c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 372438c387b5SJ. Bruce Fields if (!s) 372538c387b5SJ. Bruce Fields return; 372638c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 372738c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 372838c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 372938c387b5SJ. Bruce Fields return; 373038c387b5SJ. Bruce Fields } 373138c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3732f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3733f7a4d872SJ. Bruce Fields } 3734f7a4d872SJ. Bruce Fields 3735f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3736f7a4d872SJ. Bruce Fields { 3737f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3738f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 373938c387b5SJ. Bruce Fields } 374038c387b5SJ. Bruce Fields 37411da177e4SLinus Torvalds /* 37421da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37431da177e4SLinus Torvalds */ 3744b37ad28bSAl Viro __be32 3745ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3746a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37471da177e4SLinus Torvalds { 3748b37ad28bSAl Viro __be32 status; 3749fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3750dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37511da177e4SLinus Torvalds 37521da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3753ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3754ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37551da177e4SLinus Torvalds 37561da177e4SLinus Torvalds nfs4_lock_state(); 3757f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3758f7a4d872SJ. Bruce Fields &close->cl_stateid, 3759f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3760f7a4d872SJ. Bruce Fields &stp); 37619072d5c6SJ. Bruce Fields if (status) 37621da177e4SLinus Torvalds goto out; 3763fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 37641da177e4SLinus Torvalds status = nfs_ok; 3765dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3766dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37671da177e4SLinus Torvalds 3768f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 3769cf9182e9SJ. Bruce Fields release_last_closed_stateid(oo); 377038c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 377104ef5954SJ. Bruce Fields 377274dbafafSJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) { 377374dbafafSJ. Bruce Fields if (cstate->minorversion) { 377474dbafafSJ. Bruce Fields release_openowner(oo); 377574dbafafSJ. Bruce Fields cstate->replay_owner = NULL; 377674dbafafSJ. Bruce Fields } else { 377774dbafafSJ. Bruce Fields /* 377874dbafafSJ. Bruce Fields * In the 4.0 case we need to keep the owners around a 377974dbafafSJ. Bruce Fields * little while to handle CLOSE replay. 378004ef5954SJ. Bruce Fields */ 3781fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3782fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 378374dbafafSJ. Bruce Fields } 378474dbafafSJ. Bruce Fields } 37851da177e4SLinus Torvalds out: 37865ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37871da177e4SLinus Torvalds nfs4_unlock_state(); 37881da177e4SLinus Torvalds return status; 37891da177e4SLinus Torvalds } 37901da177e4SLinus Torvalds 3791b37ad28bSAl Viro __be32 3792ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3793ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 37941da177e4SLinus Torvalds { 3795203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3796203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 379738c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3798203a8c8eSJ. Bruce Fields struct inode *inode; 3799b37ad28bSAl Viro __be32 status; 38001da177e4SLinus Torvalds 3801ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3802203a8c8eSJ. Bruce Fields return status; 3803203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 38041da177e4SLinus Torvalds 38051da177e4SLinus Torvalds nfs4_lock_state(); 380638c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 380738c2f4b1SJ. Bruce Fields if (status) 3808203a8c8eSJ. Bruce Fields goto out; 380938c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3810d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3811203a8c8eSJ. Bruce Fields if (status) 3812203a8c8eSJ. Bruce Fields goto out; 3813203a8c8eSJ. Bruce Fields 3814203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38151da177e4SLinus Torvalds out: 3816203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3817203a8c8eSJ. Bruce Fields 38181da177e4SLinus Torvalds return status; 38191da177e4SLinus Torvalds } 38201da177e4SLinus Torvalds 38211da177e4SLinus Torvalds 38221da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38231da177e4SLinus Torvalds 3824009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3825009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3826009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38271da177e4SLinus Torvalds 382887df4de8SBenny Halevy static inline u64 382987df4de8SBenny Halevy end_offset(u64 start, u64 len) 383087df4de8SBenny Halevy { 383187df4de8SBenny Halevy u64 end; 383287df4de8SBenny Halevy 383387df4de8SBenny Halevy end = start + len; 383487df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 383587df4de8SBenny Halevy } 383687df4de8SBenny Halevy 383787df4de8SBenny Halevy /* last octet in a range */ 383887df4de8SBenny Halevy static inline u64 383987df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 384087df4de8SBenny Halevy { 384187df4de8SBenny Halevy u64 end; 384287df4de8SBenny Halevy 384387df4de8SBenny Halevy BUG_ON(!len); 384487df4de8SBenny Halevy end = start + len; 384587df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 384687df4de8SBenny Halevy } 384787df4de8SBenny Halevy 3848009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38491da177e4SLinus Torvalds { 38501da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38511da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3852009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38531da177e4SLinus Torvalds } 38541da177e4SLinus Torvalds 3855009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 38561da177e4SLinus Torvalds 38571da177e4SLinus Torvalds /* 38581da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38591da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38601da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38611da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38621da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 38631da177e4SLinus Torvalds * the VFS, but this is a very deep change! 38641da177e4SLinus Torvalds */ 38651da177e4SLinus Torvalds static inline void 38661da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 38671da177e4SLinus Torvalds { 38681da177e4SLinus Torvalds if (lock->fl_start < 0) 38691da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 38701da177e4SLinus Torvalds if (lock->fl_end < 0) 38711da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 38721da177e4SLinus Torvalds } 38731da177e4SLinus Torvalds 3874d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3875d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 38767b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3877d5b9026aSNeilBrown }; 38781da177e4SLinus Torvalds 38791da177e4SLinus Torvalds static inline void 38801da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 38811da177e4SLinus Torvalds { 3882fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 38831da177e4SLinus Torvalds 3884d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3885fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3886fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3887fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 38887c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 38897c13f344SJ. Bruce Fields /* We just don't care that much */ 38907c13f344SJ. Bruce Fields goto nevermind; 3891fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3892fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3893d5b9026aSNeilBrown } else { 38947c13f344SJ. Bruce Fields nevermind: 38957c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 38967c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3897d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3898d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 38991da177e4SLinus Torvalds } 39001da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 390187df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 390287df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 39031da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39041da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39051da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39061da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39071da177e4SLinus Torvalds } 39081da177e4SLinus Torvalds 3909b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3910b93d87c1SJ. Bruce Fields { 3911b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3912b93d87c1SJ. Bruce Fields 3913b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3914b93d87c1SJ. Bruce Fields return false; 3915b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3916b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3917b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3918b93d87c1SJ. Bruce Fields } 3919b93d87c1SJ. Bruce Fields 3920fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3921fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 39221da177e4SLinus Torvalds struct xdr_netobj *owner) 39231da177e4SLinus Torvalds { 3924009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3925b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39261da177e4SLinus Torvalds 3927009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3928b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3929b93d87c1SJ. Bruce Fields return lo; 39301da177e4SLinus Torvalds } 39311da177e4SLinus Torvalds return NULL; 39321da177e4SLinus Torvalds } 39331da177e4SLinus Torvalds 3934dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3935ff194bd9SJ. Bruce Fields { 3936009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3937009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3938009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3939009673b4SJ. Bruce Fields 394016bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3941009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3942fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3943ff194bd9SJ. Bruce Fields } 3944ff194bd9SJ. Bruce Fields 39451da177e4SLinus Torvalds /* 39461da177e4SLinus Torvalds * Alloc a lock owner structure. 39471da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 394825985edcSLucas De Marchi * occurred. 39491da177e4SLinus Torvalds * 395016bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39511da177e4SLinus Torvalds */ 39521da177e4SLinus Torvalds 3953fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3954dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3955fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39561da177e4SLinus Torvalds 3957fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3958fe0750e5SJ. Bruce Fields if (!lo) 39591da177e4SLinus Torvalds return NULL; 3960fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3961fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3962b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3963b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3964fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3965fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3966fe0750e5SJ. Bruce Fields return lo; 39671da177e4SLinus Torvalds } 39681da177e4SLinus Torvalds 3969dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3970dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 39711da177e4SLinus Torvalds { 3972dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 3973d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 39741da177e4SLinus Torvalds 3975996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 39765ac049acSNeilBrown if (stp == NULL) 39776136d2b4SJ. Bruce Fields return NULL; 3978996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 39798beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3980fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3981fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 398213cd2184SNeilBrown get_nfs4_file(fp); 39831da177e4SLinus Torvalds stp->st_file = fp; 39840997b173SJ. Bruce Fields stp->st_access_bmap = 0; 39851da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 39864c4cd222SNeilBrown stp->st_openstp = open_stp; 39871da177e4SLinus Torvalds return stp; 39881da177e4SLinus Torvalds } 39891da177e4SLinus Torvalds 3990fd39ca9aSNeilBrown static int 39911da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 39921da177e4SLinus Torvalds { 399387df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 39941da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 39951da177e4SLinus Torvalds } 39961da177e4SLinus Torvalds 3997dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 39980997b173SJ. Bruce Fields { 39990997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 40000997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 40010997b173SJ. Bruce Fields 400282c5ff1bSJeff Layton if (test_access(access, lock_stp)) 40030997b173SJ. Bruce Fields return; 40040997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 400582c5ff1bSJeff Layton set_access(access, lock_stp); 40060997b173SJ. Bruce Fields } 40070997b173SJ. Bruce Fields 40082355c596SJ. Bruce Fields static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new) 400964a284d0SJ. Bruce Fields { 401064a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 401164a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 401264a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 401364a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 401464a284d0SJ. Bruce Fields unsigned int strhashval; 401564a284d0SJ. Bruce Fields 401664a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 401764a284d0SJ. Bruce Fields if (lo) { 401864a284d0SJ. Bruce Fields if (!cstate->minorversion) 401964a284d0SJ. Bruce Fields return nfserr_bad_seqid; 402064a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 402164a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 402264a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 402364a284d0SJ. Bruce Fields return nfs_ok; 402464a284d0SJ. Bruce Fields } 402516bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 402664a284d0SJ. Bruce Fields &lock->v.new.owner); 402764a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 402864a284d0SJ. Bruce Fields if (lo == NULL) 402964a284d0SJ. Bruce Fields return nfserr_jukebox; 403064a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 403164a284d0SJ. Bruce Fields if (*lst == NULL) { 403264a284d0SJ. Bruce Fields release_lockowner(lo); 403364a284d0SJ. Bruce Fields return nfserr_jukebox; 403464a284d0SJ. Bruce Fields } 403564a284d0SJ. Bruce Fields *new = true; 403664a284d0SJ. Bruce Fields return nfs_ok; 403764a284d0SJ. Bruce Fields } 403864a284d0SJ. Bruce Fields 40391da177e4SLinus Torvalds /* 40401da177e4SLinus Torvalds * LOCK operation 40411da177e4SLinus Torvalds */ 4042b37ad28bSAl Viro __be32 4043ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4044a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40451da177e4SLinus Torvalds { 4046fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4047fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4048dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40497d947842SJ. Bruce Fields struct file *filp = NULL; 405021179d81SJeff Layton struct file_lock *file_lock = NULL; 405121179d81SJeff Layton struct file_lock *conflock = NULL; 4052b37ad28bSAl Viro __be32 status = 0; 405364a284d0SJ. Bruce Fields bool new_state = false; 4054b34f27aaSJ. Bruce Fields int lkflg; 4055b8dd7b9aSAl Viro int err; 40562c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 40571da177e4SLinus Torvalds 40581da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40591da177e4SLinus Torvalds (long long) lock->lk_offset, 40601da177e4SLinus Torvalds (long long) lock->lk_length); 40611da177e4SLinus Torvalds 40621da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 40631da177e4SLinus Torvalds return nfserr_inval; 40641da177e4SLinus Torvalds 4065ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 40668837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4067a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4068a6f6ef2fSAndy Adamson return status; 4069a6f6ef2fSAndy Adamson } 4070a6f6ef2fSAndy Adamson 40711da177e4SLinus Torvalds nfs4_lock_state(); 40721da177e4SLinus Torvalds 40731da177e4SLinus Torvalds if (lock->lk_is_new) { 4074dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 40751da177e4SLinus Torvalds 4076684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4077684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4078684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4079684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4080684e5638SJ. Bruce Fields sizeof(clientid_t)); 4081684e5638SJ. Bruce Fields 40821da177e4SLinus Torvalds status = nfserr_stale_clientid; 40832c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) 40841da177e4SLinus Torvalds goto out; 40851da177e4SLinus Torvalds 40861da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4087c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 40881da177e4SLinus Torvalds lock->lk_new_open_seqid, 40891da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4090c0a5d93eSJ. Bruce Fields &open_stp); 409137515177SNeilBrown if (status) 40921da177e4SLinus Torvalds goto out; 4093fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4094b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4095684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4096b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4097b34f27aaSJ. Bruce Fields goto out; 409864a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 409964a284d0SJ. Bruce Fields &lock_stp, &new_state); 4100e1aaa891SJ. Bruce Fields } else 4101dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 41021da177e4SLinus Torvalds lock->lk_old_lock_seqid, 41031da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41042288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 41051da177e4SLinus Torvalds if (status) 41061da177e4SLinus Torvalds goto out; 4107fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41081da177e4SLinus Torvalds 4109b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4110b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4111b34f27aaSJ. Bruce Fields if (status) 4112b34f27aaSJ. Bruce Fields goto out; 4113b34f27aaSJ. Bruce Fields 41140dd395dcSNeilBrown status = nfserr_grace; 41155ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp)) && !lock->lk_reclaim) 41160dd395dcSNeilBrown goto out; 41170dd395dcSNeilBrown status = nfserr_no_grace; 41185ccb0066SStanislav Kinsbursky if (!locks_in_grace(SVC_NET(rqstp)) && lock->lk_reclaim) 41190dd395dcSNeilBrown goto out; 41200dd395dcSNeilBrown 412121179d81SJeff Layton file_lock = locks_alloc_lock(); 412221179d81SJeff Layton if (!file_lock) { 412321179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 412421179d81SJeff Layton status = nfserr_jukebox; 412521179d81SJeff Layton goto out; 412621179d81SJeff Layton } 412721179d81SJeff Layton 412821179d81SJeff Layton locks_init_lock(file_lock); 41291da177e4SLinus Torvalds switch (lock->lk_type) { 41301da177e4SLinus Torvalds case NFS4_READ_LT: 41311da177e4SLinus Torvalds case NFS4_READW_LT: 4132f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41330997b173SJ. Bruce Fields if (filp) 41340997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 413521179d81SJeff Layton file_lock->fl_type = F_RDLCK; 41361da177e4SLinus Torvalds break; 41371da177e4SLinus Torvalds case NFS4_WRITE_LT: 41381da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4139f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41400997b173SJ. Bruce Fields if (filp) 41410997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 414221179d81SJeff Layton file_lock->fl_type = F_WRLCK; 41431da177e4SLinus Torvalds break; 41441da177e4SLinus Torvalds default: 41451da177e4SLinus Torvalds status = nfserr_inval; 41461da177e4SLinus Torvalds goto out; 41471da177e4SLinus Torvalds } 4148f9d7562fSJ. Bruce Fields if (!filp) { 4149f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4150f9d7562fSJ. Bruce Fields goto out; 4151f9d7562fSJ. Bruce Fields } 415221179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lock_sop; 415321179d81SJeff Layton file_lock->fl_pid = current->tgid; 415421179d81SJeff Layton file_lock->fl_file = filp; 415521179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 415621179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 415721179d81SJeff Layton file_lock->fl_start = lock->lk_offset; 415821179d81SJeff Layton file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 415921179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 41601da177e4SLinus Torvalds 416121179d81SJeff Layton conflock = locks_alloc_lock(); 416221179d81SJeff Layton if (!conflock) { 416321179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 416421179d81SJeff Layton status = nfserr_jukebox; 416521179d81SJeff Layton goto out; 416621179d81SJeff Layton } 41671da177e4SLinus Torvalds 416821179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); 4169b8dd7b9aSAl Viro switch (-err) { 41701da177e4SLinus Torvalds case 0: /* success! */ 4171dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4172dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 41731da177e4SLinus Torvalds sizeof(stateid_t)); 4174b8dd7b9aSAl Viro status = 0; 4175eb76b3fdSAndy Adamson break; 4176eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4177eb76b3fdSAndy Adamson status = nfserr_denied; 4178eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 417921179d81SJeff Layton nfs4_set_lock_denied(conflock, &lock->lk_denied); 4180eb76b3fdSAndy Adamson break; 41811da177e4SLinus Torvalds case (EDEADLK): 41821da177e4SLinus Torvalds status = nfserr_deadlock; 4183eb76b3fdSAndy Adamson break; 41841da177e4SLinus Torvalds default: 4185fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 41863e772463SJ. Bruce Fields status = nfserrno(err); 4187eb76b3fdSAndy Adamson break; 41881da177e4SLinus Torvalds } 41891da177e4SLinus Torvalds out: 419064a284d0SJ. Bruce Fields if (status && new_state) 4191f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 41925ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 41931da177e4SLinus Torvalds nfs4_unlock_state(); 419421179d81SJeff Layton if (file_lock) 419521179d81SJeff Layton locks_free_lock(file_lock); 419621179d81SJeff Layton if (conflock) 419721179d81SJeff Layton locks_free_lock(conflock); 41981da177e4SLinus Torvalds return status; 41991da177e4SLinus Torvalds } 42001da177e4SLinus Torvalds 42011da177e4SLinus Torvalds /* 420255ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 420355ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 420455ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 420555ef1274SJ. Bruce Fields * inode operation.) 420655ef1274SJ. Bruce Fields */ 420704da6e9dSAl Viro static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 420855ef1274SJ. Bruce Fields { 420955ef1274SJ. Bruce Fields struct file *file; 421004da6e9dSAl Viro __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 421104da6e9dSAl Viro if (!err) { 421204da6e9dSAl Viro err = nfserrno(vfs_test_lock(file, lock)); 421355ef1274SJ. Bruce Fields nfsd_close(file); 421404da6e9dSAl Viro } 421555ef1274SJ. Bruce Fields return err; 421655ef1274SJ. Bruce Fields } 421755ef1274SJ. Bruce Fields 421855ef1274SJ. Bruce Fields /* 42191da177e4SLinus Torvalds * LOCKT operation 42201da177e4SLinus Torvalds */ 4221b37ad28bSAl Viro __be32 4222ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4223ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42241da177e4SLinus Torvalds { 42251da177e4SLinus Torvalds struct inode *inode; 422621179d81SJeff Layton struct file_lock *file_lock = NULL; 4227fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4228b37ad28bSAl Viro __be32 status; 42292c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 42301da177e4SLinus Torvalds 42315ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp))) 42321da177e4SLinus Torvalds return nfserr_grace; 42331da177e4SLinus Torvalds 42341da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42351da177e4SLinus Torvalds return nfserr_inval; 42361da177e4SLinus Torvalds 42371da177e4SLinus Torvalds nfs4_lock_state(); 42381da177e4SLinus Torvalds 42391da177e4SLinus Torvalds status = nfserr_stale_clientid; 42402c142baaSStanislav Kinsbursky if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) 42411da177e4SLinus Torvalds goto out; 42421da177e4SLinus Torvalds 424375c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42441da177e4SLinus Torvalds goto out; 42451da177e4SLinus Torvalds 4246ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 424721179d81SJeff Layton file_lock = locks_alloc_lock(); 424821179d81SJeff Layton if (!file_lock) { 424921179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 425021179d81SJeff Layton status = nfserr_jukebox; 425121179d81SJeff Layton goto out; 425221179d81SJeff Layton } 425321179d81SJeff Layton locks_init_lock(file_lock); 42541da177e4SLinus Torvalds switch (lockt->lt_type) { 42551da177e4SLinus Torvalds case NFS4_READ_LT: 42561da177e4SLinus Torvalds case NFS4_READW_LT: 425721179d81SJeff Layton file_lock->fl_type = F_RDLCK; 42581da177e4SLinus Torvalds break; 42591da177e4SLinus Torvalds case NFS4_WRITE_LT: 42601da177e4SLinus Torvalds case NFS4_WRITEW_LT: 426121179d81SJeff Layton file_lock->fl_type = F_WRLCK; 42621da177e4SLinus Torvalds break; 42631da177e4SLinus Torvalds default: 42642fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 42651da177e4SLinus Torvalds status = nfserr_inval; 42661da177e4SLinus Torvalds goto out; 42671da177e4SLinus Torvalds } 42681da177e4SLinus Torvalds 4269fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4270fe0750e5SJ. Bruce Fields if (lo) 427121179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lo; 427221179d81SJeff Layton file_lock->fl_pid = current->tgid; 427321179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 42741da177e4SLinus Torvalds 427521179d81SJeff Layton file_lock->fl_start = lockt->lt_offset; 427621179d81SJeff Layton file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 42771da177e4SLinus Torvalds 427821179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 42791da177e4SLinus Torvalds 428021179d81SJeff Layton status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); 428104da6e9dSAl Viro if (status) 4282fd85b817SMarc Eshel goto out; 428304da6e9dSAl Viro 428421179d81SJeff Layton if (file_lock->fl_type != F_UNLCK) { 42851da177e4SLinus Torvalds status = nfserr_denied; 428621179d81SJeff Layton nfs4_set_lock_denied(file_lock, &lockt->lt_denied); 42871da177e4SLinus Torvalds } 42881da177e4SLinus Torvalds out: 42891da177e4SLinus Torvalds nfs4_unlock_state(); 429021179d81SJeff Layton if (file_lock) 429121179d81SJeff Layton locks_free_lock(file_lock); 42921da177e4SLinus Torvalds return status; 42931da177e4SLinus Torvalds } 42941da177e4SLinus Torvalds 4295b37ad28bSAl Viro __be32 4296ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4297a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 42981da177e4SLinus Torvalds { 4299dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43001da177e4SLinus Torvalds struct file *filp = NULL; 430121179d81SJeff Layton struct file_lock *file_lock = NULL; 4302b37ad28bSAl Viro __be32 status; 4303b8dd7b9aSAl Viro int err; 43041da177e4SLinus Torvalds 43051da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 43061da177e4SLinus Torvalds (long long) locku->lu_offset, 43071da177e4SLinus Torvalds (long long) locku->lu_length); 43081da177e4SLinus Torvalds 43091da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 43101da177e4SLinus Torvalds return nfserr_inval; 43111da177e4SLinus Torvalds 43121da177e4SLinus Torvalds nfs4_lock_state(); 43131da177e4SLinus Torvalds 43149072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 43152288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 43169072d5c6SJ. Bruce Fields if (status) 43171da177e4SLinus Torvalds goto out; 4318f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4319f9d7562fSJ. Bruce Fields if (!filp) { 4320f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4321f9d7562fSJ. Bruce Fields goto out; 4322f9d7562fSJ. Bruce Fields } 432321179d81SJeff Layton file_lock = locks_alloc_lock(); 432421179d81SJeff Layton if (!file_lock) { 432521179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 432621179d81SJeff Layton status = nfserr_jukebox; 432721179d81SJeff Layton goto out; 432821179d81SJeff Layton } 432921179d81SJeff Layton locks_init_lock(file_lock); 433021179d81SJeff Layton file_lock->fl_type = F_UNLCK; 433121179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 433221179d81SJeff Layton file_lock->fl_pid = current->tgid; 433321179d81SJeff Layton file_lock->fl_file = filp; 433421179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 433521179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 433621179d81SJeff Layton file_lock->fl_start = locku->lu_offset; 43371da177e4SLinus Torvalds 433821179d81SJeff Layton file_lock->fl_end = last_byte_offset(locku->lu_offset, 433921179d81SJeff Layton locku->lu_length); 434021179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 43411da177e4SLinus Torvalds 43421da177e4SLinus Torvalds /* 43431da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43441da177e4SLinus Torvalds */ 434521179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); 4346b8dd7b9aSAl Viro if (err) { 4347fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43481da177e4SLinus Torvalds goto out_nfserr; 43491da177e4SLinus Torvalds } 43501da177e4SLinus Torvalds /* 43511da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43521da177e4SLinus Torvalds */ 4353dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4354dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43551da177e4SLinus Torvalds 43561da177e4SLinus Torvalds out: 435771c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43581da177e4SLinus Torvalds nfs4_unlock_state(); 435921179d81SJeff Layton if (file_lock) 436021179d81SJeff Layton locks_free_lock(file_lock); 43611da177e4SLinus Torvalds return status; 43621da177e4SLinus Torvalds 43631da177e4SLinus Torvalds out_nfserr: 4364b8dd7b9aSAl Viro status = nfserrno(err); 43651da177e4SLinus Torvalds goto out; 43661da177e4SLinus Torvalds } 43671da177e4SLinus Torvalds 43681da177e4SLinus Torvalds /* 43691da177e4SLinus Torvalds * returns 43701da177e4SLinus Torvalds * 1: locks held by lockowner 43711da177e4SLinus Torvalds * 0: no locks held by lockowner 43721da177e4SLinus Torvalds */ 43731da177e4SLinus Torvalds static int 4374fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 43751da177e4SLinus Torvalds { 43761da177e4SLinus Torvalds struct file_lock **flpp; 4377f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 43781da177e4SLinus Torvalds int status = 0; 43791da177e4SLinus Torvalds 4380b89f4321SArnd Bergmann lock_flocks(); 43811da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4382796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 43831da177e4SLinus Torvalds status = 1; 43841da177e4SLinus Torvalds goto out; 43851da177e4SLinus Torvalds } 4386796dadfdSJ. Bruce Fields } 43871da177e4SLinus Torvalds out: 4388b89f4321SArnd Bergmann unlock_flocks(); 43891da177e4SLinus Torvalds return status; 43901da177e4SLinus Torvalds } 43911da177e4SLinus Torvalds 4392b37ad28bSAl Viro __be32 4393b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4394b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4395b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 43961da177e4SLinus Torvalds { 43971da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 43983e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4399fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4400dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 44011da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 44023e9e3dbeSNeilBrown struct list_head matches; 440316bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4404b37ad28bSAl Viro __be32 status; 44052c142baaSStanislav Kinsbursky struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id); 44061da177e4SLinus Torvalds 44071da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 44081da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 44091da177e4SLinus Torvalds 44101da177e4SLinus Torvalds /* XXX check for lease expiration */ 44111da177e4SLinus Torvalds 44121da177e4SLinus Torvalds status = nfserr_stale_clientid; 44132c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 44141da177e4SLinus Torvalds return status; 44151da177e4SLinus Torvalds 44161da177e4SLinus Torvalds nfs4_lock_state(); 44171da177e4SLinus Torvalds 44181da177e4SLinus Torvalds status = nfserr_locks_held; 44193e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 442006f1f864SJ. Bruce Fields 442116bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 442216bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 442316bfdaafSJ. Bruce Fields continue; 4424599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 44253e9e3dbeSNeilBrown continue; 44263e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4427ea1da636SNeilBrown st_perstateowner) { 4428fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4429fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 44301da177e4SLinus Torvalds goto out; 4431fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 44321da177e4SLinus Torvalds } 44333e9e3dbeSNeilBrown } 44343e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44353e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44363e9e3dbeSNeilBrown * have been checked. */ 44371da177e4SLinus Torvalds status = nfs_ok; 44380fa822e4SNeilBrown while (!list_empty(&matches)) { 4439fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4440fe0750e5SJ. Bruce Fields lo_list); 44410fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 44420fa822e4SNeilBrown * for openowners. */ 4443fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4444fe0750e5SJ. Bruce Fields release_lockowner(lo); 44451da177e4SLinus Torvalds } 44461da177e4SLinus Torvalds out: 44471da177e4SLinus Torvalds nfs4_unlock_state(); 44481da177e4SLinus Torvalds return status; 44491da177e4SLinus Torvalds } 44501da177e4SLinus Torvalds 44511da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4452a55370a3SNeilBrown alloc_reclaim(void) 44531da177e4SLinus Torvalds { 4454a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44551da177e4SLinus Torvalds } 44561da177e4SLinus Torvalds 4457c7b9a459SNeilBrown int 4458a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4459c7b9a459SNeilBrown { 4460c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4461c7b9a459SNeilBrown struct nfs4_client *clp; 4462c7b9a459SNeilBrown 4463e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4464393d8ed8SJ. Bruce Fields if (!clp) 4465393d8ed8SJ. Bruce Fields return 0; 4466a52d726bSJeff Layton return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); 4467c7b9a459SNeilBrown } 4468c7b9a459SNeilBrown 44691da177e4SLinus Torvalds /* 44701da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 44711da177e4SLinus Torvalds */ 4472190e4fbfSNeilBrown int 4473190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 44741da177e4SLinus Torvalds { 44751da177e4SLinus Torvalds unsigned int strhashval; 44761da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44771da177e4SLinus Torvalds 4478a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4479a55370a3SNeilBrown crp = alloc_reclaim(); 44801da177e4SLinus Torvalds if (!crp) 44811da177e4SLinus Torvalds return 0; 4482a55370a3SNeilBrown strhashval = clientstr_hashval(name); 44831da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 44841da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4485a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 44861da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 44871da177e4SLinus Torvalds return 1; 44881da177e4SLinus Torvalds } 44891da177e4SLinus Torvalds 44902a4317c5SJeff Layton void 44911da177e4SLinus Torvalds nfs4_release_reclaim(void) 44921da177e4SLinus Torvalds { 44931da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44941da177e4SLinus Torvalds int i; 44951da177e4SLinus Torvalds 44961da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44971da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 44981da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 44991da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 45001da177e4SLinus Torvalds list_del(&crp->cr_strhash); 45011da177e4SLinus Torvalds kfree(crp); 45021da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 45031da177e4SLinus Torvalds } 45041da177e4SLinus Torvalds } 45051da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 45061da177e4SLinus Torvalds } 45071da177e4SLinus Torvalds 45081da177e4SLinus Torvalds /* 45091da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 45102a4317c5SJeff Layton struct nfs4_client_reclaim * 4511a52d726bSJeff Layton nfsd4_find_reclaim_client(struct nfs4_client *clp) 45121da177e4SLinus Torvalds { 45131da177e4SLinus Torvalds unsigned int strhashval; 45141da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45151da177e4SLinus Torvalds 4516a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4517a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4518a55370a3SNeilBrown clp->cl_recdir); 45191da177e4SLinus Torvalds 45201da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4521a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 45221da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4523a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 45241da177e4SLinus Torvalds return crp; 45251da177e4SLinus Torvalds } 45261da177e4SLinus Torvalds } 45271da177e4SLinus Torvalds return NULL; 45281da177e4SLinus Torvalds } 45291da177e4SLinus Torvalds 45301da177e4SLinus Torvalds /* 45311da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 45321da177e4SLinus Torvalds */ 4533b37ad28bSAl Viro __be32 45341da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 45351da177e4SLinus Torvalds { 4536a52d726bSJeff Layton struct nfs4_client *clp; 4537a52d726bSJeff Layton 4538a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 4539a52d726bSJeff Layton clp = find_confirmed_client(clid); 4540a52d726bSJeff Layton if (clp == NULL) 4541a52d726bSJeff Layton return nfserr_reclaim_bad; 4542a52d726bSJeff Layton 4543a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45441da177e4SLinus Torvalds } 45451da177e4SLinus Torvalds 454665178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 454765178db4SBryan Schumaker 454865178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 454965178db4SBryan Schumaker { 455065178db4SBryan Schumaker struct nfs4_client *clp, *next; 455165178db4SBryan Schumaker int count = 0; 455265178db4SBryan Schumaker 455365178db4SBryan Schumaker nfs4_lock_state(); 455465178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 45552a4317c5SJeff Layton nfsd4_client_record_remove(clp); 455665178db4SBryan Schumaker expire_client(clp); 455765178db4SBryan Schumaker if (++count == num) 455865178db4SBryan Schumaker break; 455965178db4SBryan Schumaker } 456065178db4SBryan Schumaker nfs4_unlock_state(); 456165178db4SBryan Schumaker 456265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 456365178db4SBryan Schumaker } 456465178db4SBryan Schumaker 456565178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 456665178db4SBryan Schumaker { 456765178db4SBryan Schumaker release_lockowner(lockowner(sop)); 456865178db4SBryan Schumaker } 456965178db4SBryan Schumaker 457065178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 457165178db4SBryan Schumaker { 457265178db4SBryan Schumaker release_openowner(openowner(sop)); 457365178db4SBryan Schumaker } 457465178db4SBryan Schumaker 4575353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 457665178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 457765178db4SBryan Schumaker { 457865178db4SBryan Schumaker int i, count = 0; 457965178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 458065178db4SBryan Schumaker 458116bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 458216bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 458316bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 458416bfdaafSJ. Bruce Fields continue; 458565178db4SBryan Schumaker release_sop(sop); 458665178db4SBryan Schumaker if (++count == num) 458765178db4SBryan Schumaker return count; 458865178db4SBryan Schumaker } 458965178db4SBryan Schumaker } 459065178db4SBryan Schumaker return count; 459165178db4SBryan Schumaker } 459265178db4SBryan Schumaker 459365178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 459465178db4SBryan Schumaker { 459565178db4SBryan Schumaker int count; 459665178db4SBryan Schumaker 459765178db4SBryan Schumaker nfs4_lock_state(); 459816bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 459965178db4SBryan Schumaker nfs4_unlock_state(); 460065178db4SBryan Schumaker 460165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 460265178db4SBryan Schumaker } 460365178db4SBryan Schumaker 460465178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 460565178db4SBryan Schumaker { 460665178db4SBryan Schumaker int count; 460765178db4SBryan Schumaker 460865178db4SBryan Schumaker nfs4_lock_state(); 460916bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 461065178db4SBryan Schumaker nfs4_unlock_state(); 461165178db4SBryan Schumaker 461265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 461365178db4SBryan Schumaker } 461465178db4SBryan Schumaker 4615da5c80a9SJ. Bruce Fields static int nfsd_process_n_delegations(u64 num, struct list_head *list) 461665178db4SBryan Schumaker { 461765178db4SBryan Schumaker int i, count = 0; 46182d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 46192d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 462065178db4SBryan Schumaker 462165178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 46222d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 46232d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 4624a6d88f29SStanislav Kinsbursky list_move(&dp->dl_recall_lru, list); 462565178db4SBryan Schumaker if (++count == num) 462665178db4SBryan Schumaker return count; 462765178db4SBryan Schumaker } 462865178db4SBryan Schumaker } 462965178db4SBryan Schumaker } 46302d3475c0SBryan Schumaker 463165178db4SBryan Schumaker return count; 463265178db4SBryan Schumaker } 463365178db4SBryan Schumaker 463465178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 463565178db4SBryan Schumaker { 463665178db4SBryan Schumaker unsigned int count; 4637a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4638a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 4639a6d88f29SStanislav Kinsbursky 4640a6d88f29SStanislav Kinsbursky spin_lock(&recall_lock); 4641a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4642a6d88f29SStanislav Kinsbursky spin_unlock(&recall_lock); 464365178db4SBryan Schumaker 464465178db4SBryan Schumaker nfs4_lock_state(); 4645a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) 4646a6d88f29SStanislav Kinsbursky unhash_delegation(dp); 464765178db4SBryan Schumaker nfs4_unlock_state(); 464865178db4SBryan Schumaker 464965178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 465065178db4SBryan Schumaker } 465165178db4SBryan Schumaker 465265178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 465365178db4SBryan Schumaker { 465465178db4SBryan Schumaker unsigned int count; 4655a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4656a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 465765178db4SBryan Schumaker 465865178db4SBryan Schumaker spin_lock(&recall_lock); 4659a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4660a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { 4661a6d88f29SStanislav Kinsbursky list_del(&dp->dl_recall_lru); 4662a6d88f29SStanislav Kinsbursky nfsd_break_one_deleg(dp); 4663a6d88f29SStanislav Kinsbursky } 466465178db4SBryan Schumaker spin_unlock(&recall_lock); 466565178db4SBryan Schumaker 466665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 466765178db4SBryan Schumaker } 466865178db4SBryan Schumaker 466965178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 467065178db4SBryan Schumaker 4671ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 46721da177e4SLinus Torvalds 467372083396SBryan Schumaker void 4674ac4d8ff2SNeilBrown nfs4_state_init(void) 46751da177e4SLinus Torvalds { 467672083396SBryan Schumaker int i; 46771da177e4SLinus Torvalds 46781da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46791da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 46801da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 46811da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 46821da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 468302cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 46841da177e4SLinus Torvalds } 46855282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 46865282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 46871da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 46881da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 46891da177e4SLinus Torvalds } 469016bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 469116bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 46921da177e4SLinus Torvalds } 4693009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4694009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 46951da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 46961da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 46971da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4698ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4699ac4d8ff2SNeilBrown } 4700ac4d8ff2SNeilBrown 4701c2f1a551SMeelap Shah /* 4702c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4703c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4704c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4705c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4706c2f1a551SMeelap Shah * 4707c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4708c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4709c2f1a551SMeelap Shah */ 4710c2f1a551SMeelap Shah static void 4711c2f1a551SMeelap Shah set_max_delegations(void) 4712c2f1a551SMeelap Shah { 4713c2f1a551SMeelap Shah /* 4714c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4715c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4716c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4717c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4718c2f1a551SMeelap Shah */ 4719c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4720c2f1a551SMeelap Shah } 4721c2f1a551SMeelap Shah 4722ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4723ac4d8ff2SNeilBrown 4724a6d6b781SJeff Layton int 4725a6d6b781SJeff Layton nfs4_state_start(void) 4726ac4d8ff2SNeilBrown { 47275e1533c7SStanislav Kinsbursky struct net *net = &init_net; 47285e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 4729b5a1a81eSJ. Bruce Fields int ret; 4730b5a1a81eSJ. Bruce Fields 47312a4317c5SJeff Layton /* 47322a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 47332a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 47342a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 47352a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 47362a4317c5SJeff Layton * basis. 47372a4317c5SJeff Layton */ 47385e1533c7SStanislav Kinsbursky get_net(net); 47395e1533c7SStanislav Kinsbursky nfsd4_client_tracking_init(net); 47402c142baaSStanislav Kinsbursky nn->boot_time = get_seconds(); 47415ccb0066SStanislav Kinsbursky locks_start_grace(net, &nn->nfsd4_manager); 4742a51c84edSStanislav Kinsbursky nn->grace_ended = false; 47439a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4744e46b498cSJ. Bruce Fields nfsd4_grace); 4745b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4746a6d6b781SJeff Layton if (ret) { 4747a6d6b781SJeff Layton ret = -ENOMEM; 4748a6d6b781SJeff Layton goto out_recovery; 4749a6d6b781SJeff Layton } 475058da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4751a6d6b781SJeff Layton if (laundry_wq == NULL) { 4752a6d6b781SJeff Layton ret = -ENOMEM; 4753a6d6b781SJeff Layton goto out_recovery; 4754a6d6b781SJeff Layton } 4755b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4756b5a1a81eSJ. Bruce Fields if (ret) 4757b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4758e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4759c2f1a551SMeelap Shah set_max_delegations(); 4760b5a1a81eSJ. Bruce Fields return 0; 4761b5a1a81eSJ. Bruce Fields out_free_laundry: 4762b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4763a6d6b781SJeff Layton out_recovery: 47645e1533c7SStanislav Kinsbursky nfsd4_client_tracking_exit(net); 47655e1533c7SStanislav Kinsbursky put_net(net); 4766b5a1a81eSJ. Bruce Fields return ret; 47671da177e4SLinus Torvalds } 47681da177e4SLinus Torvalds 47691da177e4SLinus Torvalds static void 47701da177e4SLinus Torvalds __nfs4_state_shutdown(void) 47711da177e4SLinus Torvalds { 47721da177e4SLinus Torvalds int i; 47731da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 47741da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 47751da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 47761da177e4SLinus Torvalds 47771da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47781da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 47791da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 47801da177e4SLinus Torvalds expire_client(clp); 47811da177e4SLinus Torvalds } 47821da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 47831da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 47841da177e4SLinus Torvalds expire_client(clp); 47851da177e4SLinus Torvalds } 47861da177e4SLinus Torvalds } 47871da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 47881da177e4SLinus Torvalds spin_lock(&recall_lock); 47891da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 47901da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47911da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 47921da177e4SLinus Torvalds } 47931da177e4SLinus Torvalds spin_unlock(&recall_lock); 47941da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 47951da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47961da177e4SLinus Torvalds unhash_delegation(dp); 47971da177e4SLinus Torvalds } 47981da177e4SLinus Torvalds 47992a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 48002a4317c5SJeff Layton put_net(&init_net); 48011da177e4SLinus Torvalds } 48021da177e4SLinus Torvalds 48031da177e4SLinus Torvalds void 48041da177e4SLinus Torvalds nfs4_state_shutdown(void) 48051da177e4SLinus Torvalds { 48065e1533c7SStanislav Kinsbursky struct net *net = &init_net; 48075e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 48085e1533c7SStanislav Kinsbursky 4809afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 48105e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 48115e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 48121da177e4SLinus Torvalds nfs4_lock_state(); 48131da177e4SLinus Torvalds __nfs4_state_shutdown(); 48141da177e4SLinus Torvalds nfs4_unlock_state(); 4815c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 48161da177e4SLinus Torvalds } 48178b70484cSTigran Mkrtchyan 48188b70484cSTigran Mkrtchyan static void 48198b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 48208b70484cSTigran Mkrtchyan { 482137c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 482237c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 48238b70484cSTigran Mkrtchyan } 48248b70484cSTigran Mkrtchyan 48258b70484cSTigran Mkrtchyan static void 48268b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 48278b70484cSTigran Mkrtchyan { 482837c593c5STigran Mkrtchyan if (cstate->minorversion) { 482937c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 483037c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 483137c593c5STigran Mkrtchyan } 483237c593c5STigran Mkrtchyan } 483337c593c5STigran Mkrtchyan 483437c593c5STigran Mkrtchyan void 483537c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 483637c593c5STigran Mkrtchyan { 483737c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 48388b70484cSTigran Mkrtchyan } 48398b70484cSTigran Mkrtchyan 484062cd4a59STigran Mkrtchyan /* 484162cd4a59STigran Mkrtchyan * functions to set current state id 484262cd4a59STigran Mkrtchyan */ 48438b70484cSTigran Mkrtchyan void 48449428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48459428fe1aSTigran Mkrtchyan { 48469428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 48479428fe1aSTigran Mkrtchyan } 48489428fe1aSTigran Mkrtchyan 48499428fe1aSTigran Mkrtchyan void 48508b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 48518b70484cSTigran Mkrtchyan { 48528b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 48538b70484cSTigran Mkrtchyan } 48548b70484cSTigran Mkrtchyan 48558b70484cSTigran Mkrtchyan void 485662cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 485762cd4a59STigran Mkrtchyan { 485862cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 485962cd4a59STigran Mkrtchyan } 486062cd4a59STigran Mkrtchyan 486162cd4a59STigran Mkrtchyan void 486262cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 486362cd4a59STigran Mkrtchyan { 486462cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 486562cd4a59STigran Mkrtchyan } 486662cd4a59STigran Mkrtchyan 486762cd4a59STigran Mkrtchyan /* 486862cd4a59STigran Mkrtchyan * functions to consume current state id 486962cd4a59STigran Mkrtchyan */ 48701e97b519STigran Mkrtchyan 48711e97b519STigran Mkrtchyan void 48729428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48739428fe1aSTigran Mkrtchyan { 48749428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 48759428fe1aSTigran Mkrtchyan } 48769428fe1aSTigran Mkrtchyan 48779428fe1aSTigran Mkrtchyan void 48789428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 48799428fe1aSTigran Mkrtchyan { 48809428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 48819428fe1aSTigran Mkrtchyan } 48829428fe1aSTigran Mkrtchyan 48839428fe1aSTigran Mkrtchyan void 48841e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 48851e97b519STigran Mkrtchyan { 48861e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 48871e97b519STigran Mkrtchyan } 48881e97b519STigran Mkrtchyan 48891e97b519STigran Mkrtchyan void 48901e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 48911e97b519STigran Mkrtchyan { 48921e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 48931e97b519STigran Mkrtchyan } 48941e97b519STigran Mkrtchyan 489562cd4a59STigran Mkrtchyan void 48968b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 48978b70484cSTigran Mkrtchyan { 48988b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 48998b70484cSTigran Mkrtchyan } 49008b70484cSTigran Mkrtchyan 49018b70484cSTigran Mkrtchyan void 490262cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 49038b70484cSTigran Mkrtchyan { 490462cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 49058b70484cSTigran Mkrtchyan } 490630813e27STigran Mkrtchyan 490730813e27STigran Mkrtchyan void 490830813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 490930813e27STigran Mkrtchyan { 491030813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 491130813e27STigran Mkrtchyan } 491230813e27STigran Mkrtchyan 491330813e27STigran Mkrtchyan void 491430813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 491530813e27STigran Mkrtchyan { 491630813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 491730813e27STigran Mkrtchyan } 4918