11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 61da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 91da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 101da177e4SLinus Torvalds * are met: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 131da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 141da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 161da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 171da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 181da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 191da177e4SLinus Torvalds * from this software without specific prior written permission. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 221da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 231da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 241da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 261da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 271da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 281da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 291da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 301da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 311da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 321da177e4SLinus Torvalds * 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 35aceaf78dSDave Hansen #include <linux/file.h> 36b89f4321SArnd Bergmann #include <linux/fs.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4017456804SBryan Schumaker #include <linux/pagemap.h> 4168e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 42363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 439a74af21SBoaz Harrosh #include "xdr4.h" 440a3adadeSJ. Bruce Fields #include "vfs.h" 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds /* Globals */ 49cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 50efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 51fd39ca9aSNeilBrown static time_t boot_time; 521da177e4SLinus Torvalds static u32 current_ownerid = 1; 531da177e4SLinus Torvalds static u32 current_fileid = 1; 541da177e4SLinus Torvalds static u32 current_delegid = 1; 55fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 56fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 57ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 58fd39ca9aSNeilBrown 59fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 60fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds /* forward declarations */ 63fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 64e1ca12dfSBryan Schumaker static struct nfs4_stateid * search_for_stateid(stateid_t *stid); 65e1ca12dfSBryan Schumaker static struct nfs4_delegation * search_for_delegation(stateid_t *stid); 661da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 67e1ca12dfSBryan Schumaker static int check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner); 681da177e4SLinus Torvalds 698b671b80SJ. Bruce Fields /* Locking: */ 708b671b80SJ. Bruce Fields 718b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 72353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 731da177e4SLinus Torvalds 748b671b80SJ. Bruce Fields /* 758b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 768b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 778b671b80SJ. Bruce Fields * eventually cover more: 788b671b80SJ. Bruce Fields */ 798b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 808b671b80SJ. Bruce Fields 81e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 82e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 83e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 84e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 85e60d4398SNeilBrown 861da177e4SLinus Torvalds void 871da177e4SLinus Torvalds nfs4_lock_state(void) 881da177e4SLinus Torvalds { 89353ab6e9SIngo Molnar mutex_lock(&client_mutex); 901da177e4SLinus Torvalds } 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds void 931da177e4SLinus Torvalds nfs4_unlock_state(void) 941da177e4SLinus Torvalds { 95353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 961da177e4SLinus Torvalds } 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds static inline u32 991da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1001da177e4SLinus Torvalds { 1011da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds u32 x = 0; 1041da177e4SLinus Torvalds while (nbytes--) { 1051da177e4SLinus Torvalds x *= 37; 1061da177e4SLinus Torvalds x += *cptr++; 1071da177e4SLinus Torvalds } 1081da177e4SLinus Torvalds return x; 1091da177e4SLinus Torvalds } 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds static struct list_head del_recall_lru; 1121da177e4SLinus Torvalds 11313cd2184SNeilBrown static inline void 11413cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 11513cd2184SNeilBrown { 1168b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1178b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1188b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1198b671b80SJ. Bruce Fields iput(fi->fi_inode); 1208b671b80SJ. Bruce Fields kmem_cache_free(file_slab, fi); 1218b671b80SJ. Bruce Fields } 12213cd2184SNeilBrown } 12313cd2184SNeilBrown 12413cd2184SNeilBrown static inline void 12513cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 12613cd2184SNeilBrown { 1278b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 12813cd2184SNeilBrown } 12913cd2184SNeilBrown 130ef0f3390SNeilBrown static int num_delegations; 131c2f1a551SMeelap Shah unsigned int max_delegations; 132ef0f3390SNeilBrown 133ef0f3390SNeilBrown /* 134ef0f3390SNeilBrown * Open owner state (share locks) 135ef0f3390SNeilBrown */ 136ef0f3390SNeilBrown 137506f275fSJ. Bruce Fields /* hash tables for open owners */ 138506f275fSJ. Bruce Fields #define OPEN_OWNER_HASH_BITS 8 139506f275fSJ. Bruce Fields #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS) 140506f275fSJ. Bruce Fields #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1) 141ef0f3390SNeilBrown 142506f275fSJ. Bruce Fields static unsigned int open_ownerid_hashval(const u32 id) 143ddc04c41SJ. Bruce Fields { 144506f275fSJ. Bruce Fields return id & OPEN_OWNER_HASH_MASK; 145ddc04c41SJ. Bruce Fields } 146ddc04c41SJ. Bruce Fields 147506f275fSJ. Bruce Fields static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 148ddc04c41SJ. Bruce Fields { 149ddc04c41SJ. Bruce Fields unsigned int ret; 150ddc04c41SJ. Bruce Fields 151ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 152ddc04c41SJ. Bruce Fields ret += clientid; 153506f275fSJ. Bruce Fields return ret & OPEN_OWNER_HASH_MASK; 154ddc04c41SJ. Bruce Fields } 155ef0f3390SNeilBrown 156506f275fSJ. Bruce Fields static struct list_head open_ownerid_hashtbl[OPEN_OWNER_HASH_SIZE]; 157506f275fSJ. Bruce Fields static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE]; 158ef0f3390SNeilBrown 159ef0f3390SNeilBrown /* hash table for nfs4_file */ 160ef0f3390SNeilBrown #define FILE_HASH_BITS 8 161ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 16235079582SShan Wei 163ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 164ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 165ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 166ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 167ef0f3390SNeilBrown 168ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 169ddc04c41SJ. Bruce Fields { 170ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 171ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 172ddc04c41SJ. Bruce Fields } 173ddc04c41SJ. Bruce Fields 174ddc04c41SJ. Bruce Fields static unsigned int stateid_hashval(u32 owner_id, u32 file_id) 175ddc04c41SJ. Bruce Fields { 176ddc04c41SJ. Bruce Fields return (owner_id + file_id) & STATEID_HASH_MASK; 177ddc04c41SJ. Bruce Fields } 178ef0f3390SNeilBrown 179ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 180ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 181ef0f3390SNeilBrown 182998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 183f9d7562fSJ. Bruce Fields { 184f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 185f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 186f9d7562fSJ. Bruce Fields } 187f9d7562fSJ. Bruce Fields 188998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 189998db52cSJ. Bruce Fields { 190998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 191998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 192998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 193998db52cSJ. Bruce Fields } else 194998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 195998db52cSJ. Bruce Fields } 196998db52cSJ. Bruce Fields 197998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 198f9d7562fSJ. Bruce Fields { 199f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 200f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 201f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 202f9d7562fSJ. Bruce Fields } 203f9d7562fSJ. Bruce Fields } 204f9d7562fSJ. Bruce Fields 205998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 206f9d7562fSJ. Bruce Fields { 207f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 208f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 209f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 210f9d7562fSJ. Bruce Fields } 211f9d7562fSJ. Bruce Fields } 212f9d7562fSJ. Bruce Fields 213998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 214998db52cSJ. Bruce Fields { 215998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 216998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 217998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 218998db52cSJ. Bruce Fields } else 219998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 220998db52cSJ. Bruce Fields } 221998db52cSJ. Bruce Fields 2221da177e4SLinus Torvalds static struct nfs4_delegation * 2231da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 2241da177e4SLinus Torvalds { 2251da177e4SLinus Torvalds struct nfs4_delegation *dp; 2261da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 229c3e48080SJ. Bruce Fields /* 230c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 231c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 232c3e48080SJ. Bruce Fields * write delegations properly. 233c3e48080SJ. Bruce Fields */ 234c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 235c3e48080SJ. Bruce Fields return NULL; 23647f9940cSMeelap Shah if (fp->fi_had_conflict) 23747f9940cSMeelap Shah return NULL; 238c2f1a551SMeelap Shah if (num_delegations > max_delegations) 239ef0f3390SNeilBrown return NULL; 2405b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 2415b2d21c1SNeilBrown if (dp == NULL) 2421da177e4SLinus Torvalds return dp; 243ef0f3390SNeilBrown num_delegations++; 244ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 245ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 2461da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 2471da177e4SLinus Torvalds dp->dl_client = clp; 24813cd2184SNeilBrown get_nfs4_file(fp); 2491da177e4SLinus Torvalds dp->dl_file = fp; 2501da177e4SLinus Torvalds dp->dl_type = type; 251e4e83ea4SJ. Bruce Fields dp->dl_stateid.si_boot = boot_time; 2521da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2531da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2541da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2556c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 2561da177e4SLinus Torvalds dp->dl_time = 0; 2571da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 258b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 2591da177e4SLinus Torvalds return dp; 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds void 2631da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2641da177e4SLinus Torvalds { 2651da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2661da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 26713cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2685b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 269ef0f3390SNeilBrown num_delegations--; 2701da177e4SLinus Torvalds } 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 273acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 2741da177e4SLinus Torvalds { 275acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 276acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 277acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2784ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 279acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 280acfdf5c3SJ. Bruce Fields } 2811da177e4SLinus Torvalds } 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds /* Called under the state lock. */ 2841da177e4SLinus Torvalds static void 2851da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2861da177e4SLinus Torvalds { 287ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2881da177e4SLinus Torvalds spin_lock(&recall_lock); 2895d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 2901da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2911da177e4SLinus Torvalds spin_unlock(&recall_lock); 292acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 2931da177e4SLinus Torvalds nfs4_put_delegation(dp); 2941da177e4SLinus Torvalds } 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds /* 2971da177e4SLinus Torvalds * SETCLIENTID state 2981da177e4SLinus Torvalds */ 2991da177e4SLinus Torvalds 30036acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3019089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3029089f1b4SBenny Halevy 3031da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3041da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3051da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3061da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 3071da177e4SLinus Torvalds 308ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 309ddc04c41SJ. Bruce Fields { 310ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 311ddc04c41SJ. Bruce Fields } 312ddc04c41SJ. Bruce Fields 313ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 314ddc04c41SJ. Bruce Fields { 315ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 316ddc04c41SJ. Bruce Fields } 317ddc04c41SJ. Bruce Fields 3181da177e4SLinus Torvalds /* 3191da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 3201da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 3211da177e4SLinus Torvalds * 3221da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 3231da177e4SLinus Torvalds * setclientid_confirmed info. 3241da177e4SLinus Torvalds * 3251da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 3261da177e4SLinus Torvalds * setclientid info. 3271da177e4SLinus Torvalds * 3281da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 3291da177e4SLinus Torvalds * for lease renewal. 3301da177e4SLinus Torvalds * 3311da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 3321da177e4SLinus Torvalds * for last close replay. 3331da177e4SLinus Torvalds */ 3341da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 3351da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 3361da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 3371da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 3381da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 3391da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 3401da177e4SLinus Torvalds static struct list_head client_lru; 3411da177e4SLinus Torvalds static struct list_head close_lru; 3421da177e4SLinus Torvalds 343f9d7562fSJ. Bruce Fields /* 344f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 345f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 346f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 347f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 348f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 349f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 350f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 351f9d7562fSJ. Bruce Fields * 352f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 353f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 354f9d7562fSJ. Bruce Fields * 355f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 356f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 357f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 358f9d7562fSJ. Bruce Fields * 359f9d7562fSJ. Bruce Fields * which we should reject. 360f9d7562fSJ. Bruce Fields */ 361f9d7562fSJ. Bruce Fields static void 362f9d7562fSJ. Bruce Fields set_access(unsigned int *access, unsigned long bmap) { 363f9d7562fSJ. Bruce Fields int i; 364f9d7562fSJ. Bruce Fields 365f9d7562fSJ. Bruce Fields *access = 0; 366f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 367f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 368f9d7562fSJ. Bruce Fields *access |= i; 369f9d7562fSJ. Bruce Fields } 370f9d7562fSJ. Bruce Fields } 371f9d7562fSJ. Bruce Fields 372f9d7562fSJ. Bruce Fields static void 373f9d7562fSJ. Bruce Fields set_deny(unsigned int *deny, unsigned long bmap) { 374f9d7562fSJ. Bruce Fields int i; 375f9d7562fSJ. Bruce Fields 376f9d7562fSJ. Bruce Fields *deny = 0; 377f9d7562fSJ. Bruce Fields for (i = 0; i < 4; i++) { 378f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 379f9d7562fSJ. Bruce Fields *deny |= i ; 380f9d7562fSJ. Bruce Fields } 381f9d7562fSJ. Bruce Fields } 382f9d7562fSJ. Bruce Fields 383f9d7562fSJ. Bruce Fields static int 384f9d7562fSJ. Bruce Fields test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 385f9d7562fSJ. Bruce Fields unsigned int access, deny; 386f9d7562fSJ. Bruce Fields 387f9d7562fSJ. Bruce Fields set_access(&access, stp->st_access_bmap); 388f9d7562fSJ. Bruce Fields set_deny(&deny, stp->st_deny_bmap); 389f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 390f9d7562fSJ. Bruce Fields return 0; 391f9d7562fSJ. Bruce Fields return 1; 392f9d7562fSJ. Bruce Fields } 393f9d7562fSJ. Bruce Fields 394f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 395f9d7562fSJ. Bruce Fields { 3968f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 397f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 398f9d7562fSJ. Bruce Fields return O_RDONLY; 399f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 400f9d7562fSJ. Bruce Fields return O_WRONLY; 401f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 402f9d7562fSJ. Bruce Fields return O_RDWR; 403f9d7562fSJ. Bruce Fields } 404f9d7562fSJ. Bruce Fields BUG(); 405f9d7562fSJ. Bruce Fields } 406f9d7562fSJ. Bruce Fields 407529d7b2aSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 408529d7b2aSJ. Bruce Fields { 409529d7b2aSJ. Bruce Fields list_del(&stp->st_hash); 410529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 411529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 412529d7b2aSJ. Bruce Fields } 413529d7b2aSJ. Bruce Fields 414529d7b2aSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 415529d7b2aSJ. Bruce Fields { 416499f3edcSJ. Bruce Fields int i; 4170997b173SJ. Bruce Fields 41823fcf2ecSJ. Bruce Fields if (stp->st_access_bmap) { 419499f3edcSJ. Bruce Fields for (i = 1; i < 4; i++) { 420499f3edcSJ. Bruce Fields if (test_bit(i, &stp->st_access_bmap)) 421499f3edcSJ. Bruce Fields nfs4_file_put_access(stp->st_file, 422499f3edcSJ. Bruce Fields nfs4_access_to_omode(i)); 423499f3edcSJ. Bruce Fields } 42423fcf2ecSJ. Bruce Fields } 425a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 426529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 427529d7b2aSJ. Bruce Fields } 428529d7b2aSJ. Bruce Fields 429529d7b2aSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 430529d7b2aSJ. Bruce Fields { 431529d7b2aSJ. Bruce Fields struct file *file; 432529d7b2aSJ. Bruce Fields 433529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 434529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 435529d7b2aSJ. Bruce Fields if (file) 436529d7b2aSJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); 437529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 438529d7b2aSJ. Bruce Fields } 439529d7b2aSJ. Bruce Fields 440529d7b2aSJ. Bruce Fields static void unhash_lockowner(struct nfs4_stateowner *sop) 441529d7b2aSJ. Bruce Fields { 442529d7b2aSJ. Bruce Fields struct nfs4_stateid *stp; 443529d7b2aSJ. Bruce Fields 444529d7b2aSJ. Bruce Fields list_del(&sop->so_idhash); 445529d7b2aSJ. Bruce Fields list_del(&sop->so_strhash); 446529d7b2aSJ. Bruce Fields list_del(&sop->so_perstateid); 447529d7b2aSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 448529d7b2aSJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 449529d7b2aSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 450529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 451529d7b2aSJ. Bruce Fields } 452529d7b2aSJ. Bruce Fields } 453529d7b2aSJ. Bruce Fields 454529d7b2aSJ. Bruce Fields static void release_lockowner(struct nfs4_stateowner *sop) 455529d7b2aSJ. Bruce Fields { 456529d7b2aSJ. Bruce Fields unhash_lockowner(sop); 457529d7b2aSJ. Bruce Fields nfs4_put_stateowner(sop); 458529d7b2aSJ. Bruce Fields } 459529d7b2aSJ. Bruce Fields 460529d7b2aSJ. Bruce Fields static void 461529d7b2aSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 462529d7b2aSJ. Bruce Fields { 463529d7b2aSJ. Bruce Fields struct nfs4_stateowner *lock_sop; 464529d7b2aSJ. Bruce Fields 465529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 466529d7b2aSJ. Bruce Fields lock_sop = list_entry(open_stp->st_lockowners.next, 467529d7b2aSJ. Bruce Fields struct nfs4_stateowner, so_perstateid); 468529d7b2aSJ. Bruce Fields /* list_del(&open_stp->st_lockowners); */ 469529d7b2aSJ. Bruce Fields BUG_ON(lock_sop->so_is_open_owner); 470529d7b2aSJ. Bruce Fields release_lockowner(lock_sop); 471529d7b2aSJ. Bruce Fields } 472529d7b2aSJ. Bruce Fields } 473529d7b2aSJ. Bruce Fields 4742283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 4752283963fSJ. Bruce Fields { 4762283963fSJ. Bruce Fields unhash_generic_stateid(stp); 4772283963fSJ. Bruce Fields release_stateid_lockowners(stp); 4782283963fSJ. Bruce Fields free_generic_stateid(stp); 4792283963fSJ. Bruce Fields } 4802283963fSJ. Bruce Fields 481f044ff83SJ. Bruce Fields static void unhash_openowner(struct nfs4_stateowner *sop) 482f1d110caSJ. Bruce Fields { 483f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 484f1d110caSJ. Bruce Fields 485f1d110caSJ. Bruce Fields list_del(&sop->so_idhash); 486f1d110caSJ. Bruce Fields list_del(&sop->so_strhash); 487f1d110caSJ. Bruce Fields list_del(&sop->so_perclient); 488f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); /* XXX: necessary? */ 489f1d110caSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 490f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 491f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 492f1d110caSJ. Bruce Fields release_open_stateid(stp); 493f1d110caSJ. Bruce Fields } 494f1d110caSJ. Bruce Fields } 495f1d110caSJ. Bruce Fields 496f044ff83SJ. Bruce Fields static void release_openowner(struct nfs4_stateowner *sop) 497f1d110caSJ. Bruce Fields { 498f044ff83SJ. Bruce Fields unhash_openowner(sop); 499f1d110caSJ. Bruce Fields list_del(&sop->so_close_lru); 500f1d110caSJ. Bruce Fields nfs4_put_stateowner(sop); 501f1d110caSJ. Bruce Fields } 502f1d110caSJ. Bruce Fields 5035282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 5045282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 5055282fd72SMarc Eshel 5065282fd72SMarc Eshel static inline int 5075282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 5085282fd72SMarc Eshel { 5095282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 5105282fd72SMarc Eshel 5115282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 5125282fd72SMarc Eshel } 5135282fd72SMarc Eshel 5145282fd72SMarc Eshel static inline void 5155282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 5165282fd72SMarc Eshel { 5175282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 5185282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 5195282fd72SMarc Eshel } 5205282fd72SMarc Eshel 521ec6b5d7bSAndy Adamson static void 522ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 523ec6b5d7bSAndy Adamson { 524ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 525ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 526ec6b5d7bSAndy Adamson 527ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 528ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 529ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 530ec6b5d7bSAndy Adamson sid->reserved = 0; 531ec6b5d7bSAndy Adamson } 532ec6b5d7bSAndy Adamson 533ec6b5d7bSAndy Adamson /* 534a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 535a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 536a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 537a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 538a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 539a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 540a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 541a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 542a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 543a649637cSAndy Adamson * for the SEQUENCE op response: 544ec6b5d7bSAndy Adamson */ 545a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 546a649637cSAndy Adamson 547557ce264SAndy Adamson static void 548557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 549557ce264SAndy Adamson { 550557ce264SAndy Adamson int i; 551557ce264SAndy Adamson 552557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 553557ce264SAndy Adamson kfree(ses->se_slots[i]); 554557ce264SAndy Adamson } 555557ce264SAndy Adamson 556efe0cb6dSJ. Bruce Fields /* 557efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 558efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 559efe0cb6dSJ. Bruce Fields */ 560efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 561efe0cb6dSJ. Bruce Fields { 562efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 563efe0cb6dSJ. Bruce Fields } 564efe0cb6dSJ. Bruce Fields 5655b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 566ec6b5d7bSAndy Adamson { 5675b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 5685b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 569ec6b5d7bSAndy Adamson 5705b6feee9SJ. Bruce Fields return size; 571557ce264SAndy Adamson } 572557ce264SAndy Adamson 5735b6feee9SJ. Bruce Fields /* 5745b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 5755b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 5765b6feee9SJ. Bruce Fields * rooom for new connections. For now we just fail the create session. 5775b6feee9SJ. Bruce Fields */ 5785b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 5795b6feee9SJ. Bruce Fields { 5805b6feee9SJ. Bruce Fields int avail; 5815b6feee9SJ. Bruce Fields 5825b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 5835b6feee9SJ. Bruce Fields 5845b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 5855b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 5865b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 5875b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 5885b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 5895b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 5905b6feee9SJ. Bruce Fields 5915b6feee9SJ. Bruce Fields return num; 5925b6feee9SJ. Bruce Fields } 5935b6feee9SJ. Bruce Fields 5945b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 5955b6feee9SJ. Bruce Fields { 5965b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 5975b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 5985b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 5995b6feee9SJ. Bruce Fields } 6005b6feee9SJ. Bruce Fields 6015b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 6025b6feee9SJ. Bruce Fields { 6035b6feee9SJ. Bruce Fields struct nfsd4_session *new; 6045b6feee9SJ. Bruce Fields int mem, i; 605ec6b5d7bSAndy Adamson 606c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 607ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 6085b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 609ec6b5d7bSAndy Adamson 6105b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 6116c18ba9fSAlexandros Batsakis if (!new) 6125b6feee9SJ. Bruce Fields return NULL; 613ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 6145b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 6155b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 6165b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 6175b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 618ec6b5d7bSAndy Adamson goto out_free; 619ec6b5d7bSAndy Adamson } 6205b6feee9SJ. Bruce Fields return new; 6215b6feee9SJ. Bruce Fields out_free: 6225b6feee9SJ. Bruce Fields while (i--) 6235b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 6245b6feee9SJ. Bruce Fields kfree(new); 6255b6feee9SJ. Bruce Fields return NULL; 6265b6feee9SJ. Bruce Fields } 6275b6feee9SJ. Bruce Fields 6285b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 6295b6feee9SJ. Bruce Fields { 6305b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 6315b6feee9SJ. Bruce Fields 6325b6feee9SJ. Bruce Fields new->maxreqs = numslots; 633d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 634d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 6355b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 6365b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 6375b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 6385b6feee9SJ. Bruce Fields } 6395b6feee9SJ. Bruce Fields 64019cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 64119cf5c02SJ. Bruce Fields { 64219cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 64319cf5c02SJ. Bruce Fields kfree(c); 64419cf5c02SJ. Bruce Fields } 64519cf5c02SJ. Bruce Fields 64619cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 64719cf5c02SJ. Bruce Fields { 64819cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 64919cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 65019cf5c02SJ. Bruce Fields 65119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 65219cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 65319cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 65419cf5c02SJ. Bruce Fields free_conn(c); 65519cf5c02SJ. Bruce Fields } 65619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 657eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 65819cf5c02SJ. Bruce Fields } 65919cf5c02SJ. Bruce Fields 660d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 661c7662518SJ. Bruce Fields { 662c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 663c7662518SJ. Bruce Fields 664c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 665c7662518SJ. Bruce Fields if (!conn) 666db90681dSJ. Bruce Fields return NULL; 667c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 668c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 669d29c374cSJ. Bruce Fields conn->cn_flags = flags; 670db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 671db90681dSJ. Bruce Fields return conn; 672db90681dSJ. Bruce Fields } 673db90681dSJ. Bruce Fields 674328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 675328ead28SJ. Bruce Fields { 676328ead28SJ. Bruce Fields conn->cn_session = ses; 677328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 678328ead28SJ. Bruce Fields } 679328ead28SJ. Bruce Fields 680db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 681db90681dSJ. Bruce Fields { 682db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 683c7662518SJ. Bruce Fields 684c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 685328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 686c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 687db90681dSJ. Bruce Fields } 688c7662518SJ. Bruce Fields 68921b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 690db90681dSJ. Bruce Fields { 69119cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 69221b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 693db90681dSJ. Bruce Fields } 694db90681dSJ. Bruce Fields 6951d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 696db90681dSJ. Bruce Fields { 697db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 69821b75b01SJ. Bruce Fields int ret; 699db90681dSJ. Bruce Fields 7001d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 701db90681dSJ. Bruce Fields if (!conn) 702db90681dSJ. Bruce Fields return nfserr_jukebox; 703db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 70421b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 70521b75b01SJ. Bruce Fields if (ret) 70621b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 70721b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 708c7662518SJ. Bruce Fields return nfs_ok; 709c7662518SJ. Bruce Fields } 710c7662518SJ. Bruce Fields 7111d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 7121d1bc8f2SJ. Bruce Fields { 7131d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 7141d1bc8f2SJ. Bruce Fields 7151d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 7161d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 7171d1bc8f2SJ. Bruce Fields 7181d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 7191d1bc8f2SJ. Bruce Fields } 7201d1bc8f2SJ. Bruce Fields 7211d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 72219cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 723c7662518SJ. Bruce Fields { 72419cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 72519cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 72619cf5c02SJ. Bruce Fields 72719cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 72819cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 72919cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 73019cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 73119cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 73219cf5c02SJ. Bruce Fields 73319cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 73419cf5c02SJ. Bruce Fields free_conn(c); 73519cf5c02SJ. Bruce Fields 73619cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 73719cf5c02SJ. Bruce Fields } 73819cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 739c7662518SJ. Bruce Fields } 740c7662518SJ. Bruce Fields 741c7662518SJ. Bruce Fields void free_session(struct kref *kref) 742c7662518SJ. Bruce Fields { 743c7662518SJ. Bruce Fields struct nfsd4_session *ses; 744c7662518SJ. Bruce Fields int mem; 745c7662518SJ. Bruce Fields 746c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 74719cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 748c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 749c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 750c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 751c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 752c7662518SJ. Bruce Fields free_session_slots(ses); 753c7662518SJ. Bruce Fields kfree(ses); 754c7662518SJ. Bruce Fields } 755c7662518SJ. Bruce Fields 756ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 7575b6feee9SJ. Bruce Fields { 7585b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7595b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 7605b6feee9SJ. Bruce Fields int numslots, slotsize; 761c7662518SJ. Bruce Fields int status; 7625b6feee9SJ. Bruce Fields int idx; 7635b6feee9SJ. Bruce Fields 7645b6feee9SJ. Bruce Fields /* 7655b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 7665b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 7675b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 7685b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 7695b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 7705b6feee9SJ. Bruce Fields */ 7715b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 7725b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 773ced6dfe9SMi Jinlong if (numslots < 1) 774ced6dfe9SMi Jinlong return NULL; 7755b6feee9SJ. Bruce Fields 7765b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 7775b6feee9SJ. Bruce Fields if (!new) { 7785b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 779ac7c46f2SJ. Bruce Fields return NULL; 7805b6feee9SJ. Bruce Fields } 7815b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 782ec6b5d7bSAndy Adamson 783ec6b5d7bSAndy Adamson new->se_client = clp; 784ec6b5d7bSAndy Adamson gen_sessionid(new); 785ec6b5d7bSAndy Adamson 786c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 787c7662518SJ. Bruce Fields 788ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 789ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 7908b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 791ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 7925b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 7939089f1b4SBenny Halevy spin_lock(&client_lock); 794ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 7954c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 796ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 7974c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 7989089f1b4SBenny Halevy spin_unlock(&client_lock); 799ec6b5d7bSAndy Adamson 8001d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 801ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 802c7662518SJ. Bruce Fields if (status) { 803c7662518SJ. Bruce Fields free_session(&new->se_ref); 804ac7c46f2SJ. Bruce Fields return NULL; 805c7662518SJ. Bruce Fields } 806dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 807edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 808dcbeaa68SJ. Bruce Fields /* 809dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 810dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 811dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 812dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 813dcbeaa68SJ. Bruce Fields * future: 814dcbeaa68SJ. Bruce Fields */ 815edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 816edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 817edd76786SJ. Bruce Fields } 818dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 819ac7c46f2SJ. Bruce Fields return new; 820ec6b5d7bSAndy Adamson } 821ec6b5d7bSAndy Adamson 8229089f1b4SBenny Halevy /* caller must hold client_lock */ 8235282fd72SMarc Eshel static struct nfsd4_session * 8245282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 8255282fd72SMarc Eshel { 8265282fd72SMarc Eshel struct nfsd4_session *elem; 8275282fd72SMarc Eshel int idx; 8285282fd72SMarc Eshel 8295282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 8305282fd72SMarc Eshel idx = hash_sessionid(sessionid); 8315282fd72SMarc Eshel /* Search in the appropriate list */ 8325282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 8335282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 8345282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 8355282fd72SMarc Eshel return elem; 8365282fd72SMarc Eshel } 8375282fd72SMarc Eshel } 8385282fd72SMarc Eshel 8395282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 8405282fd72SMarc Eshel return NULL; 8415282fd72SMarc Eshel } 8425282fd72SMarc Eshel 8439089f1b4SBenny Halevy /* caller must hold client_lock */ 8447116ed6bSAndy Adamson static void 8455282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 8467116ed6bSAndy Adamson { 8477116ed6bSAndy Adamson list_del(&ses->se_hash); 8484c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 8497116ed6bSAndy Adamson list_del(&ses->se_perclnt); 8504c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 8515282fd72SMarc Eshel } 8525282fd72SMarc Eshel 85336acb66bSBenny Halevy /* must be called under the client_lock */ 8541da177e4SLinus Torvalds static inline void 85536acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 8561da177e4SLinus Torvalds { 85707cd4909SBenny Halevy if (is_client_expired(clp)) { 85807cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 85907cd4909SBenny Halevy __func__, 86007cd4909SBenny Halevy clp->cl_clientid.cl_boot, 86107cd4909SBenny Halevy clp->cl_clientid.cl_id); 86207cd4909SBenny Halevy return; 86307cd4909SBenny Halevy } 86407cd4909SBenny Halevy 8651da177e4SLinus Torvalds /* 8661da177e4SLinus Torvalds * Move client to the end to the LRU list. 8671da177e4SLinus Torvalds */ 8681da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 8691da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 8701da177e4SLinus Torvalds clp->cl_clientid.cl_id); 8711da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 8721da177e4SLinus Torvalds clp->cl_time = get_seconds(); 8731da177e4SLinus Torvalds } 8741da177e4SLinus Torvalds 87536acb66bSBenny Halevy static inline void 87636acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 87736acb66bSBenny Halevy { 87836acb66bSBenny Halevy spin_lock(&client_lock); 87936acb66bSBenny Halevy renew_client_locked(clp); 88036acb66bSBenny Halevy spin_unlock(&client_lock); 88136acb66bSBenny Halevy } 88236acb66bSBenny Halevy 8831da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 8841da177e4SLinus Torvalds static int 8851da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 8861da177e4SLinus Torvalds { 8871da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 8881da177e4SLinus Torvalds return 0; 88960adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 89060adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 8911da177e4SLinus Torvalds return 1; 8921da177e4SLinus Torvalds } 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds /* 8951da177e4SLinus Torvalds * XXX Should we use a slab cache ? 8961da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 8971da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 8981da177e4SLinus Torvalds */ 89935bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 9001da177e4SLinus Torvalds { 9011da177e4SLinus Torvalds struct nfs4_client *clp; 9021da177e4SLinus Torvalds 90335bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 90435bba9a3SJ. Bruce Fields if (clp == NULL) 90535bba9a3SJ. Bruce Fields return NULL; 90635bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 90735bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 90835bba9a3SJ. Bruce Fields kfree(clp); 90935bba9a3SJ. Bruce Fields return NULL; 91035bba9a3SJ. Bruce Fields } 9111da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 9121da177e4SLinus Torvalds clp->cl_name.len = name.len; 9131da177e4SLinus Torvalds return clp; 9141da177e4SLinus Torvalds } 9151da177e4SLinus Torvalds 9161da177e4SLinus Torvalds static inline void 9171da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 9181da177e4SLinus Torvalds { 919792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 920792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 921792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 922792c95ddSJ. Bruce Fields se_perclnt); 923792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 924792c95ddSJ. Bruce Fields nfsd4_put_session(ses); 925792c95ddSJ. Bruce Fields } 9261da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 9271da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 92868e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 9291da177e4SLinus Torvalds kfree(clp->cl_name.data); 9301da177e4SLinus Torvalds kfree(clp); 9311da177e4SLinus Torvalds } 9321da177e4SLinus Torvalds 933d7682988SBenny Halevy void 934d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 935d7682988SBenny Halevy { 936d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 937d7682988SBenny Halevy 938d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 939d7682988SBenny Halevy return; 940d7682988SBenny Halevy if (is_client_expired(clp)) { 941d7682988SBenny Halevy free_client(clp); 942d7682988SBenny Halevy session->se_client = NULL; 943d7682988SBenny Halevy } else 944d7682988SBenny Halevy renew_client_locked(clp); 945d7682988SBenny Halevy spin_unlock(&client_lock); 946d7682988SBenny Halevy } 947d7682988SBenny Halevy 94884d38ac9SBenny Halevy /* must be called under the client_lock */ 94984d38ac9SBenny Halevy static inline void 95084d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 95184d38ac9SBenny Halevy { 952792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 953792c95ddSJ. Bruce Fields 95407cd4909SBenny Halevy mark_client_expired(clp); 95584d38ac9SBenny Halevy list_del(&clp->cl_lru); 9564c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 957792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 958792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 9594c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 96084d38ac9SBenny Halevy } 96184d38ac9SBenny Halevy 9621da177e4SLinus Torvalds static void 9631da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 9641da177e4SLinus Torvalds { 9651da177e4SLinus Torvalds struct nfs4_stateowner *sop; 9661da177e4SLinus Torvalds struct nfs4_delegation *dp; 9671da177e4SLinus Torvalds struct list_head reaplist; 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 9701da177e4SLinus Torvalds spin_lock(&recall_lock); 971ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 972ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 973ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 9741da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds spin_unlock(&recall_lock); 9771da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 9781da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 9791da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 9801da177e4SLinus Torvalds unhash_delegation(dp); 9811da177e4SLinus Torvalds } 982ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 983ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 984f044ff83SJ. Bruce Fields release_openowner(sop); 9851da177e4SLinus Torvalds } 9866ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 9872bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 9882bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 98984d38ac9SBenny Halevy list_del(&clp->cl_idhash); 99084d38ac9SBenny Halevy list_del(&clp->cl_strhash); 99184d38ac9SBenny Halevy spin_lock(&client_lock); 99284d38ac9SBenny Halevy unhash_client_locked(clp); 99346583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 994b12a05cbSJ. Bruce Fields free_client(clp); 99546583e25SBenny Halevy spin_unlock(&client_lock); 9961da177e4SLinus Torvalds } 9971da177e4SLinus Torvalds 99835bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 99935bba9a3SJ. Bruce Fields { 100035bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 100135bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 10021da177e4SLinus Torvalds } 10031da177e4SLinus Torvalds 100435bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 100535bba9a3SJ. Bruce Fields { 10061da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 10071da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds 101035bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 101135bba9a3SJ. Bruce Fields { 10121da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 10131da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 10141da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 10151da177e4SLinus Torvalds get_group_info(target->cr_group_info); 10161da177e4SLinus Torvalds } 10171da177e4SLinus Torvalds 101835bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1019599e0a22SJ. Bruce Fields { 1020a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds static int 1024599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1025599e0a22SJ. Bruce Fields { 1026599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 10271da177e4SLinus Torvalds } 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds static int 1030599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1031599e0a22SJ. Bruce Fields { 1032599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds 10351da177e4SLinus Torvalds /* XXX what about NGROUP */ 10361da177e4SLinus Torvalds static int 1037599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1038599e0a22SJ. Bruce Fields { 1039599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 10401da177e4SLinus Torvalds } 10411da177e4SLinus Torvalds 10425ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 10435ec7b46cSJ. Bruce Fields { 10445ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 10455ec7b46cSJ. Bruce Fields 10461da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 10471da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 10481da177e4SLinus Torvalds } 10491da177e4SLinus Torvalds 1050deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1051deda2faaSJ. Bruce Fields { 1052deda2faaSJ. Bruce Fields static u32 i; 10531da177e4SLinus Torvalds u32 *p; 10541da177e4SLinus Torvalds 10551da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 1056deda2faaSJ. Bruce Fields *p++ = get_seconds(); 1057deda2faaSJ. Bruce Fields *p++ = i++; 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds 1060b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1061b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1062b09333c4SRicardo Labiaga { 1063b09333c4SRicardo Labiaga struct nfs4_client *clp; 1064b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1065b09333c4SRicardo Labiaga char *princ; 1066b09333c4SRicardo Labiaga 1067b09333c4SRicardo Labiaga clp = alloc_client(name); 1068b09333c4SRicardo Labiaga if (clp == NULL) 1069b09333c4SRicardo Labiaga return NULL; 1070b09333c4SRicardo Labiaga 1071792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1072792c95ddSJ. Bruce Fields 1073b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1074b09333c4SRicardo Labiaga if (princ) { 1075b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1076b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1077b09333c4SRicardo Labiaga free_client(clp); 1078b09333c4SRicardo Labiaga return NULL; 1079b09333c4SRicardo Labiaga } 1080b09333c4SRicardo Labiaga } 1081b09333c4SRicardo Labiaga 1082b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 108346583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 108477a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1085b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1086b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1087b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1088b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1089b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 10905ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 10916ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1092cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 109307cd4909SBenny Halevy clp->cl_time = get_seconds(); 1094b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1095b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1096b09333c4SRicardo Labiaga copy_verf(clp, verf); 1097b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1098b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1099b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1100b09333c4SRicardo Labiaga gen_confirm(clp); 1101edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1102b09333c4SRicardo Labiaga return clp; 1103b09333c4SRicardo Labiaga } 1104b09333c4SRicardo Labiaga 110535bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 110635bba9a3SJ. Bruce Fields { 11071da177e4SLinus Torvalds if (name.len == 0) 11081da177e4SLinus Torvalds return 0; 11091da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 11102fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 11111da177e4SLinus Torvalds return 0; 11121da177e4SLinus Torvalds } 11131da177e4SLinus Torvalds return 1; 11141da177e4SLinus Torvalds } 11151da177e4SLinus Torvalds 1116fd39ca9aSNeilBrown static void 11171da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 11181da177e4SLinus Torvalds { 11191da177e4SLinus Torvalds unsigned int idhashval; 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 11221da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 11231da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 112436acb66bSBenny Halevy renew_client(clp); 11251da177e4SLinus Torvalds } 11261da177e4SLinus Torvalds 1127fd39ca9aSNeilBrown static void 11281da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 11291da177e4SLinus Torvalds { 11301da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 11311da177e4SLinus Torvalds unsigned int strhashval; 11321da177e4SLinus Torvalds 11331da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1134f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1135a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1136328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 11371da177e4SLinus Torvalds renew_client(clp); 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static struct nfs4_client * 11411da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 11421da177e4SLinus Torvalds { 11431da177e4SLinus Torvalds struct nfs4_client *clp; 11441da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1147599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11481da177e4SLinus Torvalds return clp; 11491da177e4SLinus Torvalds } 11501da177e4SLinus Torvalds return NULL; 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds 11531da177e4SLinus Torvalds static struct nfs4_client * 11541da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 11551da177e4SLinus Torvalds { 11561da177e4SLinus Torvalds struct nfs4_client *clp; 11571da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11581da177e4SLinus Torvalds 11591da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1160599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11611da177e4SLinus Torvalds return clp; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds return NULL; 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 11666e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1167a1bcecd2SAndy Adamson { 11686e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1169a1bcecd2SAndy Adamson } 1170a1bcecd2SAndy Adamson 117128ce6054SNeilBrown static struct nfs4_client * 1172e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 117328ce6054SNeilBrown { 117428ce6054SNeilBrown struct nfs4_client *clp; 117528ce6054SNeilBrown 117628ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1177e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 117828ce6054SNeilBrown return clp; 117928ce6054SNeilBrown } 118028ce6054SNeilBrown return NULL; 118128ce6054SNeilBrown } 118228ce6054SNeilBrown 118328ce6054SNeilBrown static struct nfs4_client * 1184e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 118528ce6054SNeilBrown { 118628ce6054SNeilBrown struct nfs4_client *clp; 118728ce6054SNeilBrown 118828ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1189e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 119028ce6054SNeilBrown return clp; 119128ce6054SNeilBrown } 119228ce6054SNeilBrown return NULL; 119328ce6054SNeilBrown } 119428ce6054SNeilBrown 11956f3d772fSTakuma Umeya static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) 11966f3d772fSTakuma Umeya { 11976f3d772fSTakuma Umeya switch (family) { 11986f3d772fSTakuma Umeya case AF_INET: 11996f3d772fSTakuma Umeya ((struct sockaddr_in *)sa)->sin_family = AF_INET; 12006f3d772fSTakuma Umeya ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; 12016f3d772fSTakuma Umeya return; 12026f3d772fSTakuma Umeya case AF_INET6: 12036f3d772fSTakuma Umeya ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; 12046f3d772fSTakuma Umeya ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; 12056f3d772fSTakuma Umeya return; 12066f3d772fSTakuma Umeya } 12076f3d772fSTakuma Umeya } 12086f3d772fSTakuma Umeya 1209fd39ca9aSNeilBrown static void 12106f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 12111da177e4SLinus Torvalds { 121207263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 12136f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 12146f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 12157077ecbaSJeff Layton unsigned short expected_family; 12161da177e4SLinus Torvalds 12177077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 12187077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 12197077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 12207077ecbaSJeff Layton expected_family = AF_INET; 12217077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 12227077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 12237077ecbaSJeff Layton expected_family = AF_INET6; 12247077ecbaSJeff Layton else 12251da177e4SLinus Torvalds goto out_err; 12261da177e4SLinus Torvalds 122707263f1eSJ. Bruce Fields conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, 1228aa9a4ec7SJeff Layton se->se_callback_addr_len, 122907263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 123007263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1231aa9a4ec7SJeff Layton 123207263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 12331da177e4SLinus Torvalds goto out_err; 1234aa9a4ec7SJeff Layton 123507263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 123607263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1237fbf4665fSJeff Layton 123807263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 123907263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 12406f3d772fSTakuma Umeya rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); 12411da177e4SLinus Torvalds return; 12421da177e4SLinus Torvalds out_err: 124307263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 124407263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1245849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 12461da177e4SLinus Torvalds "will not receive delegations\n", 12471da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 12481da177e4SLinus Torvalds 12491da177e4SLinus Torvalds return; 12501da177e4SLinus Torvalds } 12511da177e4SLinus Torvalds 1252074fe897SAndy Adamson /* 1253557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1254074fe897SAndy Adamson */ 1255074fe897SAndy Adamson void 1256074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1257074fe897SAndy Adamson { 1258557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1259557ce264SAndy Adamson unsigned int base; 1260074fe897SAndy Adamson 1261557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1262074fe897SAndy Adamson 1263557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1264557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1265bf864a31SAndy Adamson 1266bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1267557ce264SAndy Adamson slot->sl_datalen = 0; 1268bf864a31SAndy Adamson return; 1269bf864a31SAndy Adamson } 1270557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1271557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1272557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1273557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1274557ce264SAndy Adamson slot->sl_datalen)) 1275557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1276557ce264SAndy Adamson return; 1277074fe897SAndy Adamson } 1278074fe897SAndy Adamson 1279074fe897SAndy Adamson /* 1280abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1281abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1282abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1283abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1284abfabf8cSAndy Adamson * 1285074fe897SAndy Adamson */ 1286abfabf8cSAndy Adamson static __be32 1287abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1288abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1289074fe897SAndy Adamson { 1290abfabf8cSAndy Adamson struct nfsd4_op *op; 1291abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1292074fe897SAndy Adamson 1293abfabf8cSAndy Adamson dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, 1294557ce264SAndy Adamson resp->opcnt, resp->cstate.slot->sl_cachethis); 1295abfabf8cSAndy Adamson 1296abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1297abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1298abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1299abfabf8cSAndy Adamson 1300abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 1301557ce264SAndy Adamson if (args->opcnt > 1 && slot->sl_cachethis == 0) { 1302abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1303abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1304abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1305074fe897SAndy Adamson } 1306abfabf8cSAndy Adamson return op->status; 1307074fe897SAndy Adamson } 1308074fe897SAndy Adamson 1309074fe897SAndy Adamson /* 1310557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1311557ce264SAndy Adamson * session values. 1312074fe897SAndy Adamson */ 1313074fe897SAndy Adamson __be32 1314bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1315bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1316074fe897SAndy Adamson { 1317557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1318074fe897SAndy Adamson __be32 status; 1319074fe897SAndy Adamson 1320557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1321074fe897SAndy Adamson 1322abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1323abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1324abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1325abfabf8cSAndy Adamson return status; 1326074fe897SAndy Adamson 1327557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1328557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1329074fe897SAndy Adamson 1330557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1331557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1332557ce264SAndy Adamson status = slot->sl_status; 1333074fe897SAndy Adamson 1334074fe897SAndy Adamson return status; 1335074fe897SAndy Adamson } 1336074fe897SAndy Adamson 13370733d213SAndy Adamson /* 13380733d213SAndy Adamson * Set the exchange_id flags returned by the server. 13390733d213SAndy Adamson */ 13400733d213SAndy Adamson static void 13410733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 13420733d213SAndy Adamson { 13430733d213SAndy Adamson /* pNFS is not supported */ 13440733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 13450733d213SAndy Adamson 13460733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 13470733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 13480733d213SAndy Adamson 13490733d213SAndy Adamson /* set the wire flags to return to client. */ 13500733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 13510733d213SAndy Adamson } 13520733d213SAndy Adamson 1353b37ad28bSAl Viro __be32 1354069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1355069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1356069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1357069b6ad4SAndy Adamson { 13580733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 13590733d213SAndy Adamson int status; 13600733d213SAndy Adamson unsigned int strhashval; 13610733d213SAndy Adamson char dname[HEXDIR_LEN]; 1362363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 13630733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1364363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 13650733d213SAndy Adamson 1366363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 13670733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1368363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 13690733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1370363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 13710733d213SAndy Adamson 13720733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 13730733d213SAndy Adamson return nfserr_inval; 13740733d213SAndy Adamson 13750733d213SAndy Adamson /* Currently only support SP4_NONE */ 13760733d213SAndy Adamson switch (exid->spa_how) { 13770733d213SAndy Adamson case SP4_NONE: 13780733d213SAndy Adamson break; 13790733d213SAndy Adamson case SP4_SSV: 1380044bc1d4SJ. Bruce Fields return nfserr_serverfault; 13810733d213SAndy Adamson default: 13820733d213SAndy Adamson BUG(); /* checked by xdr code */ 13830733d213SAndy Adamson case SP4_MACH_CRED: 13840733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 13850733d213SAndy Adamson } 13860733d213SAndy Adamson 13870733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 13880733d213SAndy Adamson 13890733d213SAndy Adamson if (status) 13900733d213SAndy Adamson goto error; 13910733d213SAndy Adamson 13920733d213SAndy Adamson strhashval = clientstr_hashval(dname); 13930733d213SAndy Adamson 13940733d213SAndy Adamson nfs4_lock_state(); 13950733d213SAndy Adamson status = nfs_ok; 13960733d213SAndy Adamson 1397e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 13980733d213SAndy Adamson if (conf) { 1399e203d506SJ. Bruce Fields if (!clp_used_exchangeid(conf)) { 1400e203d506SJ. Bruce Fields status = nfserr_clid_inuse; /* XXX: ? */ 1401e203d506SJ. Bruce Fields goto out; 1402e203d506SJ. Bruce Fields } 14030733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 14040733d213SAndy Adamson /* 18.35.4 case 8 */ 14050733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14060733d213SAndy Adamson status = nfserr_not_same; 14070733d213SAndy Adamson goto out; 14080733d213SAndy Adamson } 14090733d213SAndy Adamson /* Client reboot: destroy old state */ 14100733d213SAndy Adamson expire_client(conf); 14110733d213SAndy Adamson goto out_new; 14120733d213SAndy Adamson } 14130733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 14140733d213SAndy Adamson /* 18.35.4 case 9 */ 14150733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14160733d213SAndy Adamson status = nfserr_perm; 14170733d213SAndy Adamson goto out; 14180733d213SAndy Adamson } 14190733d213SAndy Adamson expire_client(conf); 14200733d213SAndy Adamson goto out_new; 14210733d213SAndy Adamson } 14220733d213SAndy Adamson /* 14230733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 14240733d213SAndy Adamson * confirmed client id (18.35.3). 14250733d213SAndy Adamson */ 14260733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 14270733d213SAndy Adamson 14280733d213SAndy Adamson /* 14290733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 14300733d213SAndy Adamson * Leave confirmed record intact and return same result. 14310733d213SAndy Adamson */ 14320733d213SAndy Adamson copy_verf(conf, &verf); 14330733d213SAndy Adamson new = conf; 14340733d213SAndy Adamson goto out_copy; 14356ddbbbfeSMike Sager } 14366ddbbbfeSMike Sager 14370733d213SAndy Adamson /* 18.35.4 case 7 */ 14380733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14390733d213SAndy Adamson status = nfserr_noent; 14400733d213SAndy Adamson goto out; 14410733d213SAndy Adamson } 14420733d213SAndy Adamson 1443e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 14440733d213SAndy Adamson if (unconf) { 14450733d213SAndy Adamson /* 14460733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 14470733d213SAndy Adamson * a new unconfirmed record should be generated regardless 14480733d213SAndy Adamson * of whether any properties have changed. 14490733d213SAndy Adamson */ 14500733d213SAndy Adamson expire_client(unconf); 14510733d213SAndy Adamson } 14520733d213SAndy Adamson 14530733d213SAndy Adamson out_new: 14540733d213SAndy Adamson /* Normal case */ 1455b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 14560733d213SAndy Adamson if (new == NULL) { 14574731030dSJ. Bruce Fields status = nfserr_jukebox; 14580733d213SAndy Adamson goto out; 14590733d213SAndy Adamson } 14600733d213SAndy Adamson 14610733d213SAndy Adamson gen_clid(new); 14620733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 14630733d213SAndy Adamson out_copy: 14640733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 14650733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 14660733d213SAndy Adamson 146738eb76a5SAndy Adamson exid->seqid = 1; 14680733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 14690733d213SAndy Adamson 14700733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 147149557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 14720733d213SAndy Adamson status = nfs_ok; 14730733d213SAndy Adamson 14740733d213SAndy Adamson out: 14750733d213SAndy Adamson nfs4_unlock_state(); 14760733d213SAndy Adamson error: 14770733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 14780733d213SAndy Adamson return status; 1479069b6ad4SAndy Adamson } 1480069b6ad4SAndy Adamson 1481b85d4c01SBenny Halevy static int 148288e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1483b85d4c01SBenny Halevy { 148488e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 148588e588d5SAndy Adamson slot_seqid); 1486b85d4c01SBenny Halevy 1487b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 148888e588d5SAndy Adamson if (slot_inuse) { 148988e588d5SAndy Adamson if (seqid == slot_seqid) 1490b85d4c01SBenny Halevy return nfserr_jukebox; 1491b85d4c01SBenny Halevy else 1492b85d4c01SBenny Halevy return nfserr_seq_misordered; 1493b85d4c01SBenny Halevy } 1494b85d4c01SBenny Halevy /* Normal */ 149588e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1496b85d4c01SBenny Halevy return nfs_ok; 1497b85d4c01SBenny Halevy /* Replay */ 149888e588d5SAndy Adamson if (seqid == slot_seqid) 1499b85d4c01SBenny Halevy return nfserr_replay_cache; 1500b85d4c01SBenny Halevy /* Wraparound */ 150188e588d5SAndy Adamson if (seqid == 1 && (slot_seqid + 1) == 0) 1502b85d4c01SBenny Halevy return nfs_ok; 1503b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1504b85d4c01SBenny Halevy return nfserr_seq_misordered; 1505b85d4c01SBenny Halevy } 1506b85d4c01SBenny Halevy 150749557cc7SAndy Adamson /* 150849557cc7SAndy Adamson * Cache the create session result into the create session single DRC 150949557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 151049557cc7SAndy Adamson * Do this for solo or embedded create session operations. 151149557cc7SAndy Adamson */ 151249557cc7SAndy Adamson static void 151349557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 151449557cc7SAndy Adamson struct nfsd4_clid_slot *slot, int nfserr) 151549557cc7SAndy Adamson { 151649557cc7SAndy Adamson slot->sl_status = nfserr; 151749557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 151849557cc7SAndy Adamson } 151949557cc7SAndy Adamson 152049557cc7SAndy Adamson static __be32 152149557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 152249557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 152349557cc7SAndy Adamson { 152449557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 152549557cc7SAndy Adamson return slot->sl_status; 152649557cc7SAndy Adamson } 152749557cc7SAndy Adamson 15281b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 15291b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 15301b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 15311b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 15321b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 15331b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 15341b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 15351b74c25bSMi Jinlong 15361b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 15371b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 15381b74c25bSMi Jinlong 1 + /* status */ \ 15391b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 15401b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 15411b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 15421b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 15431b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 15441b74c25bSMi Jinlong 15451b74c25bSMi Jinlong static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 15461b74c25bSMi Jinlong { 15471b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 15481b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 15491b74c25bSMi Jinlong } 15501b74c25bSMi Jinlong 1551069b6ad4SAndy Adamson __be32 1552069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1553069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1554069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1555069b6ad4SAndy Adamson { 1556363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1557ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1558ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 155949557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 156086c3e16cSJ. Bruce Fields bool confirm_me = false; 1561ec6b5d7bSAndy Adamson int status = 0; 1562ec6b5d7bSAndy Adamson 1563a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1564a62573dcSMi Jinlong return nfserr_inval; 1565a62573dcSMi Jinlong 1566ec6b5d7bSAndy Adamson nfs4_lock_state(); 1567ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1568ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1569ec6b5d7bSAndy Adamson 1570ec6b5d7bSAndy Adamson if (conf) { 157149557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 157249557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 157338eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1574ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 157549557cc7SAndy Adamson cs_slot->sl_seqid); 157638eb76a5SAndy Adamson /* Return the cached reply status */ 157749557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 157838eb76a5SAndy Adamson goto out; 157949557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1580ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1581ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1582ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 158349557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1584ec6b5d7bSAndy Adamson goto out; 1585ec6b5d7bSAndy Adamson } 1586ec6b5d7bSAndy Adamson } else if (unconf) { 1587ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1588363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1589ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1590ec6b5d7bSAndy Adamson goto out; 1591ec6b5d7bSAndy Adamson } 1592ec6b5d7bSAndy Adamson 159349557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 159449557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 159538eb76a5SAndy Adamson if (status) { 159638eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1597ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1598cd5b8144SJ. Bruce Fields goto out; 1599ec6b5d7bSAndy Adamson } 1600ec6b5d7bSAndy Adamson 160186c3e16cSJ. Bruce Fields confirm_me = true; 1602ec6b5d7bSAndy Adamson conf = unconf; 1603ec6b5d7bSAndy Adamson } else { 1604ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1605ec6b5d7bSAndy Adamson goto out; 1606ec6b5d7bSAndy Adamson } 1607ec6b5d7bSAndy Adamson 1608408b79bcSJ. Bruce Fields /* 16098323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 16108323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 16118323c3b2SJ. Bruce Fields */ 16128323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 16138323c3b2SJ. Bruce Fields /* 1614408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1615408b79bcSJ. Bruce Fields */ 1616408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1617408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1618408b79bcSJ. Bruce Fields 16191b74c25bSMi Jinlong status = nfserr_toosmall; 16201b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 16211b74c25bSMi Jinlong goto out; 16221b74c25bSMi Jinlong 1623ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1624ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1625ac7c46f2SJ. Bruce Fields if (!new) 1626ec6b5d7bSAndy Adamson goto out; 1627ac7c46f2SJ. Bruce Fields status = nfs_ok; 1628ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1629ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 163012050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 163112050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 163286c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 163349557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1634ec6b5d7bSAndy Adamson 163549557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 163649557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 163786c3e16cSJ. Bruce Fields if (confirm_me) 163886c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1639ec6b5d7bSAndy Adamson out: 1640ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1641ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1642ec6b5d7bSAndy Adamson return status; 1643069b6ad4SAndy Adamson } 1644069b6ad4SAndy Adamson 164557716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 164657716355SJ. Bruce Fields { 164757716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 164857716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 164957716355SJ. Bruce Fields 165057716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 165157716355SJ. Bruce Fields } 165257716355SJ. Bruce Fields 16531d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 16541d1bc8f2SJ. Bruce Fields { 16551d1bc8f2SJ. Bruce Fields switch (*dir) { 16561d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 16571d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 16581d1bc8f2SJ. Bruce Fields return nfs_ok; 16591d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 16601d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 16611d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 16621d1bc8f2SJ. Bruce Fields return nfs_ok; 16631d1bc8f2SJ. Bruce Fields }; 16641d1bc8f2SJ. Bruce Fields return nfserr_inval; 16651d1bc8f2SJ. Bruce Fields } 16661d1bc8f2SJ. Bruce Fields 16671d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 16681d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 16691d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 16701d1bc8f2SJ. Bruce Fields { 16711d1bc8f2SJ. Bruce Fields __be32 status; 16721d1bc8f2SJ. Bruce Fields 16731d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 16741d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 16751d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 16761d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 16771d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 16781d1bc8f2SJ. Bruce Fields * client_lock iself: */ 16791d1bc8f2SJ. Bruce Fields if (cstate->session) { 16801d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 16811d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 16821d1bc8f2SJ. Bruce Fields } 16831d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 16841d1bc8f2SJ. Bruce Fields if (!cstate->session) 16851d1bc8f2SJ. Bruce Fields return nfserr_badsession; 16861d1bc8f2SJ. Bruce Fields 16871d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 16881db2b9ddSBryan Schumaker if (!status) 16891d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 16901db2b9ddSBryan Schumaker return status; 16911d1bc8f2SJ. Bruce Fields } 16921d1bc8f2SJ. Bruce Fields 16935d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 16945d4cec2fSJ. Bruce Fields { 16955d4cec2fSJ. Bruce Fields if (!session) 16965d4cec2fSJ. Bruce Fields return 0; 16975d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 16985d4cec2fSJ. Bruce Fields } 16995d4cec2fSJ. Bruce Fields 1700069b6ad4SAndy Adamson __be32 1701069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1702069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1703069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1704069b6ad4SAndy Adamson { 1705e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1706e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1707e10e0cfcSBenny Halevy 1708e10e0cfcSBenny Halevy /* Notes: 1709e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1710e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1711e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1712e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1713e10e0cfcSBenny Halevy */ 1714e10e0cfcSBenny Halevy 17155d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 171657716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 171757716355SJ. Bruce Fields return nfserr_not_only_op; 171857716355SJ. Bruce Fields } 1719e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 17209089f1b4SBenny Halevy spin_lock(&client_lock); 1721e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1722e10e0cfcSBenny Halevy if (!ses) { 17239089f1b4SBenny Halevy spin_unlock(&client_lock); 1724e10e0cfcSBenny Halevy goto out; 1725e10e0cfcSBenny Halevy } 1726e10e0cfcSBenny Halevy 1727e10e0cfcSBenny Halevy unhash_session(ses); 17289089f1b4SBenny Halevy spin_unlock(&client_lock); 1729e10e0cfcSBenny Halevy 1730ab707e15SBenny Halevy nfs4_lock_state(); 173184f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1732ab707e15SBenny Halevy nfs4_unlock_state(); 173319cf5c02SJ. Bruce Fields 173419cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 173519cf5c02SJ. Bruce Fields 1736e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1737e10e0cfcSBenny Halevy status = nfs_ok; 1738e10e0cfcSBenny Halevy out: 1739e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1740e10e0cfcSBenny Halevy return status; 1741069b6ad4SAndy Adamson } 1742069b6ad4SAndy Adamson 1743a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1744328ead28SJ. Bruce Fields { 1745328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1746328ead28SJ. Bruce Fields 1747328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1748a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1749328ead28SJ. Bruce Fields return c; 1750328ead28SJ. Bruce Fields } 1751328ead28SJ. Bruce Fields } 1752328ead28SJ. Bruce Fields return NULL; 1753328ead28SJ. Bruce Fields } 1754328ead28SJ. Bruce Fields 1755a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1756328ead28SJ. Bruce Fields { 1757328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1758a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 175921b75b01SJ. Bruce Fields int ret; 1760328ead28SJ. Bruce Fields 1761328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1762a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1763328ead28SJ. Bruce Fields if (c) { 1764328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1765328ead28SJ. Bruce Fields free_conn(new); 1766328ead28SJ. Bruce Fields return; 1767328ead28SJ. Bruce Fields } 1768328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1769328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 177021b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 177121b75b01SJ. Bruce Fields if (ret) 177221b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 177321b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1774328ead28SJ. Bruce Fields return; 1775328ead28SJ. Bruce Fields } 1776328ead28SJ. Bruce Fields 1777868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1778868b89c3SMi Jinlong { 1779868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1780868b89c3SMi Jinlong 1781868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1782868b89c3SMi Jinlong } 1783868b89c3SMi Jinlong 1784ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1785ae82a8d0SMi Jinlong struct nfsd4_session *session) 1786ae82a8d0SMi Jinlong { 1787ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1788ae82a8d0SMi Jinlong 1789ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1790ae82a8d0SMi Jinlong } 1791ae82a8d0SMi Jinlong 1792069b6ad4SAndy Adamson __be32 1793b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1794069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1795069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1796069b6ad4SAndy Adamson { 1797f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1798b85d4c01SBenny Halevy struct nfsd4_session *session; 1799b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1800a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 1801b85d4c01SBenny Halevy int status; 1802b85d4c01SBenny Halevy 1803f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1804f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1805f9bb94c4SAndy Adamson 1806a663bdd8SJ. Bruce Fields /* 1807a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1808a663bdd8SJ. Bruce Fields * below. 1809a663bdd8SJ. Bruce Fields */ 1810a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1811a663bdd8SJ. Bruce Fields if (!conn) 1812a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1813a663bdd8SJ. Bruce Fields 18149089f1b4SBenny Halevy spin_lock(&client_lock); 1815b85d4c01SBenny Halevy status = nfserr_badsession; 1816b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1817b85d4c01SBenny Halevy if (!session) 1818b85d4c01SBenny Halevy goto out; 1819b85d4c01SBenny Halevy 1820868b89c3SMi Jinlong status = nfserr_too_many_ops; 1821868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 1822868b89c3SMi Jinlong goto out; 1823868b89c3SMi Jinlong 1824ae82a8d0SMi Jinlong status = nfserr_req_too_big; 1825ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 1826ae82a8d0SMi Jinlong goto out; 1827ae82a8d0SMi Jinlong 1828b85d4c01SBenny Halevy status = nfserr_badslot; 18296c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1830b85d4c01SBenny Halevy goto out; 1831b85d4c01SBenny Halevy 1832557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1833b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1834b85d4c01SBenny Halevy 1835a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1836a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1837a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1838a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1839a8dfdaebSAndy Adamson 184088e588d5SAndy Adamson status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); 1841b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1842b85d4c01SBenny Halevy cstate->slot = slot; 1843b85d4c01SBenny Halevy cstate->session = session; 1844da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1845557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1846bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1847da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1848aaf84eb9SBenny Halevy goto out; 1849b85d4c01SBenny Halevy } 1850b85d4c01SBenny Halevy if (status) 1851b85d4c01SBenny Halevy goto out; 1852b85d4c01SBenny Halevy 1853a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 1854a663bdd8SJ. Bruce Fields conn = NULL; 1855328ead28SJ. Bruce Fields 1856b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1857b85d4c01SBenny Halevy slot->sl_inuse = true; 1858b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1859557ce264SAndy Adamson slot->sl_cachethis = seq->cachethis; 1860b85d4c01SBenny Halevy 1861b85d4c01SBenny Halevy cstate->slot = slot; 1862b85d4c01SBenny Halevy cstate->session = session; 1863b85d4c01SBenny Halevy 1864b85d4c01SBenny Halevy out: 186526c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 1866aaf84eb9SBenny Halevy if (cstate->session) { 18670d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 18680d7bb719SJ. Bruce Fields 186936acb66bSBenny Halevy nfsd4_get_session(cstate->session); 18700d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 18710d7bb719SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_DOWN) 18720d7bb719SJ. Bruce Fields seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; 1873aaf84eb9SBenny Halevy } 1874a663bdd8SJ. Bruce Fields kfree(conn); 187536acb66bSBenny Halevy spin_unlock(&client_lock); 1876b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1877b85d4c01SBenny Halevy return status; 1878069b6ad4SAndy Adamson } 1879069b6ad4SAndy Adamson 1880069b6ad4SAndy Adamson __be32 18814dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 18824dc6ec00SJ. Bruce Fields { 1883bcecf1ccSMi Jinlong int status = 0; 1884bcecf1ccSMi Jinlong 18854dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 18864dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 18874dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 18884dc6ec00SJ. Bruce Fields /* 18894dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 18904dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 18914dc6ec00SJ. Bruce Fields */ 18924dc6ec00SJ. Bruce Fields return nfs_ok; 18934dc6ec00SJ. Bruce Fields } 1894bcecf1ccSMi Jinlong 18954dc6ec00SJ. Bruce Fields nfs4_lock_state(); 1896bcecf1ccSMi Jinlong status = nfserr_complete_already; 1897bcecf1ccSMi Jinlong if (cstate->session->se_client->cl_firststate) 1898bcecf1ccSMi Jinlong goto out; 1899bcecf1ccSMi Jinlong 1900bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 1901bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 19024dc6ec00SJ. Bruce Fields /* 19034dc6ec00SJ. Bruce Fields * The following error isn't really legal. 19044dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 19054dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 19064dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 19074dc6ec00SJ. Bruce Fields * client. 19084dc6ec00SJ. Bruce Fields */ 1909bcecf1ccSMi Jinlong goto out; 1910bcecf1ccSMi Jinlong 1911bcecf1ccSMi Jinlong status = nfs_ok; 19124dc6ec00SJ. Bruce Fields nfsd4_create_clid_dir(cstate->session->se_client); 1913bcecf1ccSMi Jinlong out: 19144dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 1915bcecf1ccSMi Jinlong return status; 19164dc6ec00SJ. Bruce Fields } 19174dc6ec00SJ. Bruce Fields 19184dc6ec00SJ. Bruce Fields __be32 1919b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1920b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 19211da177e4SLinus Torvalds { 19221da177e4SLinus Torvalds struct xdr_netobj clname = { 19231da177e4SLinus Torvalds .len = setclid->se_namelen, 19241da177e4SLinus Torvalds .data = setclid->se_name, 19251da177e4SLinus Torvalds }; 19261da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 19271da177e4SLinus Torvalds unsigned int strhashval; 192828ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1929b37ad28bSAl Viro __be32 status; 1930a55370a3SNeilBrown char dname[HEXDIR_LEN]; 19311da177e4SLinus Torvalds 19321da177e4SLinus Torvalds if (!check_name(clname)) 193373aea4ecSNeil Brown return nfserr_inval; 19341da177e4SLinus Torvalds 1935a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1936a55370a3SNeilBrown if (status) 193773aea4ecSNeil Brown return status; 1938a55370a3SNeilBrown 19391da177e4SLinus Torvalds /* 19401da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 19411da177e4SLinus Torvalds * We get here on a DRC miss. 19421da177e4SLinus Torvalds */ 19431da177e4SLinus Torvalds 1944a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 19451da177e4SLinus Torvalds 19461da177e4SLinus Torvalds nfs4_lock_state(); 1947e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 194828ce6054SNeilBrown if (conf) { 1949a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 19501da177e4SLinus Torvalds status = nfserr_clid_inuse; 1951e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 1952e203d506SJ. Bruce Fields goto out; 1953026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1954363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 1955363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 1956363168b4SJeff Layton sizeof(addr_str)); 1957026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 1958363168b4SJeff Layton "at %s\n", addr_str); 19591da177e4SLinus Torvalds goto out; 19601da177e4SLinus Torvalds } 19611da177e4SLinus Torvalds } 1962a186e767SJ. Bruce Fields /* 1963a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1964a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1965a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1966a186e767SJ. Bruce Fields */ 1967e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 19683e772463SJ. Bruce Fields status = nfserr_jukebox; 19691da177e4SLinus Torvalds if (!conf) { 19701da177e4SLinus Torvalds /* 1971a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1972a186e767SJ. Bruce Fields * placed first, because it is the normal case 19731da177e4SLinus Torvalds */ 19741da177e4SLinus Torvalds if (unconf) 19751da177e4SLinus Torvalds expire_client(unconf); 1976b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1977a55370a3SNeilBrown if (new == NULL) 19781da177e4SLinus Torvalds goto out; 19791da177e4SLinus Torvalds gen_clid(new); 1980599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 19811da177e4SLinus Torvalds /* 1982a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1983a186e767SJ. Bruce Fields * probable callback update 19841da177e4SLinus Torvalds */ 198531f4a6c1SNeilBrown if (unconf) { 198631f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 198731f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 198831f4a6c1SNeilBrown * This has the advantage that there is at most 198931f4a6c1SNeilBrown * one {*x***} in either list at any time. 199031f4a6c1SNeilBrown */ 19911da177e4SLinus Torvalds expire_client(unconf); 19921da177e4SLinus Torvalds } 1993b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1994a55370a3SNeilBrown if (new == NULL) 19951da177e4SLinus Torvalds goto out; 19961da177e4SLinus Torvalds copy_clid(new, conf); 19971da177e4SLinus Torvalds } else if (!unconf) { 19981da177e4SLinus Torvalds /* 1999a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 2000a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2001a186e767SJ. Bruce Fields * confirmed. 20021da177e4SLinus Torvalds */ 2003b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2004a55370a3SNeilBrown if (new == NULL) 20051da177e4SLinus Torvalds goto out; 20061da177e4SLinus Torvalds gen_clid(new); 200749ba8781SJ. Bruce Fields } else { 20081da177e4SLinus Torvalds /* 2009a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 2010a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2011a186e767SJ. Bruce Fields * confirmed. 20121da177e4SLinus Torvalds */ 20131da177e4SLinus Torvalds expire_client(unconf); 2014b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2015a55370a3SNeilBrown if (new == NULL) 20161da177e4SLinus Torvalds goto out; 20171da177e4SLinus Torvalds gen_clid(new); 20181da177e4SLinus Torvalds } 20198323c3b2SJ. Bruce Fields /* 20208323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 20218323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 20228323c3b2SJ. Bruce Fields */ 20238323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 20246f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2025c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 20261da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 20271da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 20281da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 20291da177e4SLinus Torvalds status = nfs_ok; 20301da177e4SLinus Torvalds out: 20311da177e4SLinus Torvalds nfs4_unlock_state(); 20321da177e4SLinus Torvalds return status; 20331da177e4SLinus Torvalds } 20341da177e4SLinus Torvalds 20351da177e4SLinus Torvalds 20361da177e4SLinus Torvalds /* 2037a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 2038a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 2039a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 20401da177e4SLinus Torvalds */ 2041b37ad28bSAl Viro __be32 2042b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2043b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2044b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 20451da177e4SLinus Torvalds { 2046363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 204721ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 20481da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 20491da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2050b37ad28bSAl Viro __be32 status; 20511da177e4SLinus Torvalds 20521da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 20531da177e4SLinus Torvalds return nfserr_stale_clientid; 20541da177e4SLinus Torvalds /* 20551da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 20561da177e4SLinus Torvalds * We get here on a DRC miss. 20571da177e4SLinus Torvalds */ 20581da177e4SLinus Torvalds 20591da177e4SLinus Torvalds nfs4_lock_state(); 206021ab45a4SNeilBrown 206121ab45a4SNeilBrown conf = find_confirmed_client(clid); 206221ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 206321ab45a4SNeilBrown 206422de4d83SNeilBrown status = nfserr_clid_inuse; 2065363168b4SJeff Layton if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) 20661da177e4SLinus Torvalds goto out; 2067363168b4SJeff Layton if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) 20681da177e4SLinus Torvalds goto out; 206921ab45a4SNeilBrown 2070a186e767SJ. Bruce Fields /* 2071a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 2072a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 2073a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 2074a186e767SJ. Bruce Fields */ 2075366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 2076a186e767SJ. Bruce Fields /* 2077a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 2078a186e767SJ. Bruce Fields * callback update 20797c79f737SNeilBrown */ 2080599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 20811da177e4SLinus Torvalds status = nfserr_clid_inuse; 20821da177e4SLinus Torvalds else { 20835a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 20845a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 20851a69c179SNeilBrown expire_client(unconf); 20861da177e4SLinus Torvalds status = nfs_ok; 20871a69c179SNeilBrown 20881da177e4SLinus Torvalds } 2089f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 2090a186e767SJ. Bruce Fields /* 2091a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 2092a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 2093a186e767SJ. Bruce Fields * do nothing. 20947c79f737SNeilBrown */ 2095599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 20961da177e4SLinus Torvalds status = nfserr_clid_inuse; 209721ab45a4SNeilBrown else 20981da177e4SLinus Torvalds status = nfs_ok; 20997c79f737SNeilBrown } else if (!conf && unconf 2100599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 2101a186e767SJ. Bruce Fields /* 2102a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 2103a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 21041da177e4SLinus Torvalds */ 2105599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 21061da177e4SLinus Torvalds status = nfserr_clid_inuse; 21071da177e4SLinus Torvalds } else { 21081a69c179SNeilBrown unsigned int hash = 21091a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 21101a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2111e203d506SJ. Bruce Fields hash); 21121a69c179SNeilBrown if (conf) { 2113c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 21141a69c179SNeilBrown expire_client(conf); 21151a69c179SNeilBrown } 21161da177e4SLinus Torvalds move_to_confirmed(unconf); 211721ab45a4SNeilBrown conf = unconf; 21185a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 21191a69c179SNeilBrown status = nfs_ok; 21201da177e4SLinus Torvalds } 2121599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 2122599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 21237c79f737SNeilBrown &confirm)))) { 2124a186e767SJ. Bruce Fields /* 2125a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 2126a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 21271da177e4SLinus Torvalds */ 21281da177e4SLinus Torvalds status = nfserr_stale_clientid; 21297c79f737SNeilBrown } else { 21301da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 213122de4d83SNeilBrown status = nfserr_clid_inuse; 213208e8987cSNeilBrown } 21331da177e4SLinus Torvalds out: 21341da177e4SLinus Torvalds nfs4_unlock_state(); 21351da177e4SLinus Torvalds return status; 21361da177e4SLinus Torvalds } 21371da177e4SLinus Torvalds 21381da177e4SLinus Torvalds /* OPEN Share state helper functions */ 21391da177e4SLinus Torvalds static inline struct nfs4_file * 21401da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 21411da177e4SLinus Torvalds { 21421da177e4SLinus Torvalds struct nfs4_file *fp; 21431da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 21441da177e4SLinus Torvalds 2145e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 2146e60d4398SNeilBrown if (fp) { 21478b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 21481da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 21498beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 21508beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 21511da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 21521da177e4SLinus Torvalds fp->fi_id = current_fileid++; 215347f9940cSMeelap Shah fp->fi_had_conflict = false; 2154acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2155f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2156f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 215747cee541SPavel Emelyanov spin_lock(&recall_lock); 215847cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 215947cee541SPavel Emelyanov spin_unlock(&recall_lock); 21601da177e4SLinus Torvalds return fp; 21611da177e4SLinus Torvalds } 21621da177e4SLinus Torvalds return NULL; 21631da177e4SLinus Torvalds } 21641da177e4SLinus Torvalds 21651da177e4SLinus Torvalds static void 2166e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2167e60d4398SNeilBrown { 2168e60d4398SNeilBrown if (*slab == NULL) 2169e60d4398SNeilBrown return; 21701a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2171e60d4398SNeilBrown *slab = NULL; 2172e60d4398SNeilBrown } 2173e60d4398SNeilBrown 2174e8ff2a84SJ. Bruce Fields void 2175e60d4398SNeilBrown nfsd4_free_slabs(void) 2176e60d4398SNeilBrown { 2177e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 2178e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 21795ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 21805b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2181e60d4398SNeilBrown } 21821da177e4SLinus Torvalds 21831da177e4SLinus Torvalds static int 21841da177e4SLinus Torvalds nfsd4_init_slabs(void) 21851da177e4SLinus Torvalds { 21861da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 218720c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 2188e60d4398SNeilBrown if (stateowner_slab == NULL) 2189e60d4398SNeilBrown goto out_nomem; 2190e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 219120c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2192e60d4398SNeilBrown if (file_slab == NULL) 2193e60d4398SNeilBrown goto out_nomem; 21945ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 219520c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 21965ac049acSNeilBrown if (stateid_slab == NULL) 21975ac049acSNeilBrown goto out_nomem; 21985b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 219920c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 22005b2d21c1SNeilBrown if (deleg_slab == NULL) 22015b2d21c1SNeilBrown goto out_nomem; 2202e60d4398SNeilBrown return 0; 2203e60d4398SNeilBrown out_nomem: 2204e60d4398SNeilBrown nfsd4_free_slabs(); 22051da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 22061da177e4SLinus Torvalds return -ENOMEM; 22071da177e4SLinus Torvalds } 22081da177e4SLinus Torvalds 22091da177e4SLinus Torvalds void 22101da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 22111da177e4SLinus Torvalds { 22121da177e4SLinus Torvalds struct nfs4_stateowner *sop = 22131da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 22141da177e4SLinus Torvalds kfree(sop->so_owner.data); 22151da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 22161da177e4SLinus Torvalds } 22171da177e4SLinus Torvalds 2218ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2219ff194bd9SJ. Bruce Fields { 2220ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2221ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2222ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2223ff194bd9SJ. Bruce Fields } 2224ff194bd9SJ. Bruce Fields 2225ff194bd9SJ. Bruce Fields static inline struct nfs4_stateowner *alloc_stateowner(struct xdr_netobj *owner, struct nfs4_client *clp) 22261da177e4SLinus Torvalds { 22271da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22281da177e4SLinus Torvalds 2229ff194bd9SJ. Bruce Fields sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL); 2230ff194bd9SJ. Bruce Fields if (!sop) 2231ff194bd9SJ. Bruce Fields return NULL; 2232ff194bd9SJ. Bruce Fields 2233ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2234ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2235ff194bd9SJ. Bruce Fields kmem_cache_free(stateowner_slab, sop); 2236ff194bd9SJ. Bruce Fields return NULL; 2237ff194bd9SJ. Bruce Fields } 22381da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2239ff194bd9SJ. Bruce Fields 22401da177e4SLinus Torvalds kref_init(&sop->so_ref); 2241ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_perclient); 2242ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2243ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_perstateid); 2244ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_close_lru); 2245ff194bd9SJ. Bruce Fields sop->so_id = current_ownerid++; 2246ff194bd9SJ. Bruce Fields sop->so_time = 0; 2247ff194bd9SJ. Bruce Fields sop->so_client = clp; 2248ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 22491da177e4SLinus Torvalds return sop; 22501da177e4SLinus Torvalds } 2251ff194bd9SJ. Bruce Fields 2252ff194bd9SJ. Bruce Fields static void hash_openowner(struct nfs4_stateowner *sop, struct nfs4_client *clp, unsigned int strhashval) 2253ff194bd9SJ. Bruce Fields { 2254ff194bd9SJ. Bruce Fields unsigned int idhashval; 2255ff194bd9SJ. Bruce Fields 2256ff194bd9SJ. Bruce Fields idhashval = open_ownerid_hashval(sop->so_id); 2257ff194bd9SJ. Bruce Fields list_add(&sop->so_idhash, &open_ownerid_hashtbl[idhashval]); 2258ff194bd9SJ. Bruce Fields list_add(&sop->so_strhash, &open_ownerstr_hashtbl[strhashval]); 2259ff194bd9SJ. Bruce Fields list_add(&sop->so_perclient, &clp->cl_openowners); 22601da177e4SLinus Torvalds } 22611da177e4SLinus Torvalds 22621da177e4SLinus Torvalds static struct nfs4_stateowner * 22631da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 22641da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22651da177e4SLinus Torvalds 2266ff194bd9SJ. Bruce Fields sop = alloc_stateowner(&open->op_owner, clp); 2267ff194bd9SJ. Bruce Fields if (!sop) 22681da177e4SLinus Torvalds return NULL; 22691da177e4SLinus Torvalds sop->so_is_open_owner = 1; 22701da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 22711da177e4SLinus Torvalds sop->so_confirmed = 0; 2272ff194bd9SJ. Bruce Fields hash_openowner(sop, clp, strhashval); 22731da177e4SLinus Torvalds return sop; 22741da177e4SLinus Torvalds } 22751da177e4SLinus Torvalds 22761da177e4SLinus Torvalds static inline void 22771da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 22781da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 22791da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 22801da177e4SLinus Torvalds 22811da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 2282ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2283ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 22841da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 22851da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 2286ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 22878beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 22885fa0bbb4SJ. Bruce Fields stp->st_type = NFS4_OPEN_STID; 22891da177e4SLinus Torvalds stp->st_stateowner = sop; 229013cd2184SNeilBrown get_nfs4_file(fp); 22911da177e4SLinus Torvalds stp->st_file = fp; 2292e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 22931da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 22941da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 22951da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 22961da177e4SLinus Torvalds stp->st_access_bmap = 0; 22971da177e4SLinus Torvalds stp->st_deny_bmap = 0; 229884459a11SAndy Adamson __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, 229984459a11SAndy Adamson &stp->st_access_bmap); 23001da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 23014c4cd222SNeilBrown stp->st_openstp = NULL; 23021da177e4SLinus Torvalds } 23031da177e4SLinus Torvalds 23041da177e4SLinus Torvalds static void 23051da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 23061da177e4SLinus Torvalds { 23071da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 23081da177e4SLinus Torvalds 2309358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 23101da177e4SLinus Torvalds sop->so_time = get_seconds(); 23111da177e4SLinus Torvalds } 23121da177e4SLinus Torvalds 23131da177e4SLinus Torvalds static int 2314599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2315599e0a22SJ. Bruce Fields clientid_t *clid) 2316599e0a22SJ. Bruce Fields { 2317599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2318599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2319599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 23201da177e4SLinus Torvalds } 23211da177e4SLinus Torvalds 23221da177e4SLinus Torvalds static struct nfs4_stateowner * 23231da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 23241da177e4SLinus Torvalds { 23251da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 23261da177e4SLinus Torvalds 2327506f275fSJ. Bruce Fields list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { 2328599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 23291da177e4SLinus Torvalds return so; 23301da177e4SLinus Torvalds } 23311da177e4SLinus Torvalds return NULL; 23321da177e4SLinus Torvalds } 23331da177e4SLinus Torvalds 23341da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 23351da177e4SLinus Torvalds static struct nfs4_file * 23361da177e4SLinus Torvalds find_file(struct inode *ino) 23371da177e4SLinus Torvalds { 23381da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23391da177e4SLinus Torvalds struct nfs4_file *fp; 23401da177e4SLinus Torvalds 23418b671b80SJ. Bruce Fields spin_lock(&recall_lock); 23421da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 234313cd2184SNeilBrown if (fp->fi_inode == ino) { 234413cd2184SNeilBrown get_nfs4_file(fp); 23458b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 23461da177e4SLinus Torvalds return fp; 23471da177e4SLinus Torvalds } 234813cd2184SNeilBrown } 23498b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 23501da177e4SLinus Torvalds return NULL; 23511da177e4SLinus Torvalds } 23521da177e4SLinus Torvalds 2353d87a8adeSAndy Adamson static inline int access_valid(u32 x, u32 minorversion) 2354ba5a6a19SJ. Bruce Fields { 2355d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) 23568838dc43SJ. Bruce Fields return 0; 2357d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) 2358d87a8adeSAndy Adamson return 0; 2359d87a8adeSAndy Adamson x &= ~NFS4_SHARE_ACCESS_MASK; 2360d87a8adeSAndy Adamson if (minorversion && x) { 2361d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) 2362d87a8adeSAndy Adamson return 0; 2363d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) 2364d87a8adeSAndy Adamson return 0; 2365d87a8adeSAndy Adamson x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); 2366d87a8adeSAndy Adamson } 2367d87a8adeSAndy Adamson if (x) 23688838dc43SJ. Bruce Fields return 0; 23698838dc43SJ. Bruce Fields return 1; 2370ba5a6a19SJ. Bruce Fields } 2371ba5a6a19SJ. Bruce Fields 23728838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 2373ba5a6a19SJ. Bruce Fields { 23748838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 23758838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 2376ba5a6a19SJ. Bruce Fields } 23771da177e4SLinus Torvalds 23784f83aa30SJ. Bruce Fields /* 23791da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 23801da177e4SLinus Torvalds * WRITE with all zero or all one stateid 23811da177e4SLinus Torvalds */ 2382b37ad28bSAl Viro static __be32 23831da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 23841da177e4SLinus Torvalds { 23851da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 23861da177e4SLinus Torvalds struct nfs4_file *fp; 23871da177e4SLinus Torvalds struct nfs4_stateid *stp; 2388b37ad28bSAl Viro __be32 ret; 23891da177e4SLinus Torvalds 23901da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 23911da177e4SLinus Torvalds 23921da177e4SLinus Torvalds fp = find_file(ino); 239313cd2184SNeilBrown if (!fp) 239413cd2184SNeilBrown return nfs_ok; 2395b700949bSNeilBrown ret = nfserr_locked; 23961da177e4SLinus Torvalds /* Search for conflicting share reservations */ 23978beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 23981da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 23991da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 240013cd2184SNeilBrown goto out; 24011da177e4SLinus Torvalds } 240213cd2184SNeilBrown ret = nfs_ok; 240313cd2184SNeilBrown out: 240413cd2184SNeilBrown put_nfs4_file(fp); 240513cd2184SNeilBrown return ret; 24061da177e4SLinus Torvalds } 24071da177e4SLinus Torvalds 24086b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 24091da177e4SLinus Torvalds { 24101da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 24111da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 24121da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 24131da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 24141da177e4SLinus Torvalds * it's safe to take a reference: */ 24151da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 24161da177e4SLinus Torvalds 24171da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 24181da177e4SLinus Torvalds 2419460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 24201da177e4SLinus Torvalds dp->dl_time = get_seconds(); 24211da177e4SLinus Torvalds 24226b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 24236b57d9c8SJ. Bruce Fields } 24246b57d9c8SJ. Bruce Fields 2425acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 24266b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 24276b57d9c8SJ. Bruce Fields { 2428acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2429acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 24306b57d9c8SJ. Bruce Fields 2431acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2432acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2433acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 24340272e1fdSJ. Bruce Fields /* 24350272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2436acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 24376b57d9c8SJ. Bruce Fields * in time: 24380272e1fdSJ. Bruce Fields */ 24390272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 24401da177e4SLinus Torvalds 24415d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2442acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2443acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 24445d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 24455d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 24461da177e4SLinus Torvalds } 24471da177e4SLinus Torvalds 24481da177e4SLinus Torvalds static 24491da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 24501da177e4SLinus Torvalds { 24511da177e4SLinus Torvalds if (arg & F_UNLCK) 24521da177e4SLinus Torvalds return lease_modify(onlist, arg); 24531da177e4SLinus Torvalds else 24541da177e4SLinus Torvalds return -EAGAIN; 24551da177e4SLinus Torvalds } 24561da177e4SLinus Torvalds 24577b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 24588fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 24598fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 24601da177e4SLinus Torvalds }; 24611da177e4SLinus Torvalds 24621da177e4SLinus Torvalds 2463b37ad28bSAl Viro __be32 24646668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 24656668958fSAndy Adamson struct nfsd4_open *open) 24661da177e4SLinus Torvalds { 24671da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 24681da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 24691da177e4SLinus Torvalds unsigned int strhashval; 24701da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 24711da177e4SLinus Torvalds 24721da177e4SLinus Torvalds if (!check_name(open->op_owner)) 24730f442aa2SJ. Bruce Fields return nfserr_inval; 24741da177e4SLinus Torvalds 24751da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 24761da177e4SLinus Torvalds return nfserr_stale_clientid; 24771da177e4SLinus Torvalds 2478506f275fSJ. Bruce Fields strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); 24791da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 24801da177e4SLinus Torvalds open->op_stateowner = sop; 24810f442aa2SJ. Bruce Fields if (!sop) { 24820f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 24830f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 24840f442aa2SJ. Bruce Fields if (clp == NULL) 24850f442aa2SJ. Bruce Fields return nfserr_expired; 24860f442aa2SJ. Bruce Fields goto renew; 24870f442aa2SJ. Bruce Fields } 24886668958fSAndy Adamson /* When sessions are used, skip open sequenceid processing */ 24896668958fSAndy Adamson if (nfsd4_has_session(cstate)) 24906668958fSAndy Adamson goto renew; 2491ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 24920f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2493ae8b6253SJ. Bruce Fields clp = sop->so_client; 2494f044ff83SJ. Bruce Fields release_openowner(sop); 24950f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 2496ae8b6253SJ. Bruce Fields goto renew; 24970f442aa2SJ. Bruce Fields } 24980f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 24991da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 2500a90b061cSAl Viro return nfserr_replay_me; 25011da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 25021da177e4SLinus Torvalds * that we don't even have replay data saved! 25031da177e4SLinus Torvalds * Therefore, we have no choice but to continue 25041da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 25051da177e4SLinus Torvalds * fail again for the same reason. 25061da177e4SLinus Torvalds */ 25070f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 25081da177e4SLinus Torvalds goto renew; 25091da177e4SLinus Torvalds } 25100f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 25110f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 25120f442aa2SJ. Bruce Fields renew: 25130f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 25141da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 25151da177e4SLinus Torvalds if (sop == NULL) 25163e772463SJ. Bruce Fields return nfserr_jukebox; 25171da177e4SLinus Torvalds open->op_stateowner = sop; 25180f442aa2SJ. Bruce Fields } 25190f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 25201da177e4SLinus Torvalds renew_client(sop->so_client); 25210f442aa2SJ. Bruce Fields return nfs_ok; 25221da177e4SLinus Torvalds } 25231da177e4SLinus Torvalds 2524b37ad28bSAl Viro static inline __be32 25254a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 25264a6e43e6SNeilBrown { 25274a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 25284a6e43e6SNeilBrown return nfserr_openmode; 25294a6e43e6SNeilBrown else 25304a6e43e6SNeilBrown return nfs_ok; 25314a6e43e6SNeilBrown } 25324a6e43e6SNeilBrown 253352f4fb43SNeilBrown static struct nfs4_delegation * 253452f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 253552f4fb43SNeilBrown { 253632b007b4SJ. Bruce Fields struct nfs4_delegation *dp; 253752f4fb43SNeilBrown 2538acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 253932b007b4SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 254032b007b4SJ. Bruce Fields if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { 2541acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2542acfdf5c3SJ. Bruce Fields return dp; 254352f4fb43SNeilBrown } 254432b007b4SJ. Bruce Fields spin_unlock(&recall_lock); 254532b007b4SJ. Bruce Fields return NULL; 254632b007b4SJ. Bruce Fields } 254752f4fb43SNeilBrown 2548c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 254924a0111eSJ. Bruce Fields { 255024a0111eSJ. Bruce Fields share_access &= ~NFS4_SHARE_WANT_MASK; 255124a0111eSJ. Bruce Fields 255224a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 255324a0111eSJ. Bruce Fields } 255424a0111eSJ. Bruce Fields 2555b37ad28bSAl Viro static __be32 2556567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2557567d9829SNeilBrown struct nfs4_delegation **dp) 2558567d9829SNeilBrown { 2559567d9829SNeilBrown int flags; 2560b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2561567d9829SNeilBrown 2562567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2563567d9829SNeilBrown if (*dp == NULL) 2564c44c5eebSNeilBrown goto out; 256524a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2566567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2567567d9829SNeilBrown if (status) 2568567d9829SNeilBrown *dp = NULL; 2569c44c5eebSNeilBrown out: 2570c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2571c44c5eebSNeilBrown return nfs_ok; 2572c44c5eebSNeilBrown if (status) 2573c44c5eebSNeilBrown return status; 2574c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 2575c44c5eebSNeilBrown return nfs_ok; 2576567d9829SNeilBrown } 2577567d9829SNeilBrown 2578b37ad28bSAl Viro static __be32 25791da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 25801da177e4SLinus Torvalds { 25811da177e4SLinus Torvalds struct nfs4_stateid *local; 2582b37ad28bSAl Viro __be32 status = nfserr_share_denied; 25831da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 25841da177e4SLinus Torvalds 25858beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 25861da177e4SLinus Torvalds /* ignore lock owners */ 25871da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 25881da177e4SLinus Torvalds continue; 25891da177e4SLinus Torvalds /* remember if we have seen this open owner */ 25901da177e4SLinus Torvalds if (local->st_stateowner == sop) 25911da177e4SLinus Torvalds *stpp = local; 25921da177e4SLinus Torvalds /* check for conflicting share reservations */ 25931da177e4SLinus Torvalds if (!test_share(local, open)) 25941da177e4SLinus Torvalds goto out; 25951da177e4SLinus Torvalds } 25961da177e4SLinus Torvalds status = 0; 25971da177e4SLinus Torvalds out: 25981da177e4SLinus Torvalds return status; 25991da177e4SLinus Torvalds } 26001da177e4SLinus Torvalds 26015ac049acSNeilBrown static inline struct nfs4_stateid * 26025ac049acSNeilBrown nfs4_alloc_stateid(void) 26035ac049acSNeilBrown { 26045ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 26055ac049acSNeilBrown } 26065ac049acSNeilBrown 260721fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 260821fb4016SJ. Bruce Fields { 260921fb4016SJ. Bruce Fields int flags = 0; 261021fb4016SJ. Bruce Fields 261121fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 261221fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 261321fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 261421fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 261521fb4016SJ. Bruce Fields return flags; 261621fb4016SJ. Bruce Fields } 261721fb4016SJ. Bruce Fields 26180c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 26190c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2620f9d7562fSJ. Bruce Fields { 2621f9d7562fSJ. Bruce Fields __be32 status; 26220c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 26230c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 26240c12eaffSCasey Bodley 26250c12eaffSCasey Bodley /* CLAIM_DELEGATE_CUR is used in response to a broken lease; 26260c12eaffSCasey Bodley * allowing it to break the lease and return EAGAIN leaves the 26270c12eaffSCasey Bodley * client unable to make progress in returning the delegation */ 26280c12eaffSCasey Bodley if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 26290c12eaffSCasey Bodley access |= NFSD_MAY_NOT_BREAK_LEASE; 2630f9d7562fSJ. Bruce Fields 2631f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2632f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2633f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2634f9d7562fSJ. Bruce Fields if (status) 2635f9d7562fSJ. Bruce Fields return status; 2636f9d7562fSJ. Bruce Fields } 2637f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2638f9d7562fSJ. Bruce Fields 2639f9d7562fSJ. Bruce Fields return nfs_ok; 2640f9d7562fSJ. Bruce Fields } 2641f9d7562fSJ. Bruce Fields 2642b37ad28bSAl Viro static __be32 26431da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2644f9d7562fSJ. Bruce Fields struct nfs4_file *fp, struct svc_fh *cur_fh, 2645f9d7562fSJ. Bruce Fields struct nfsd4_open *open) 26461da177e4SLinus Torvalds { 26471da177e4SLinus Torvalds struct nfs4_stateid *stp; 2648f9d7562fSJ. Bruce Fields __be32 status; 26491da177e4SLinus Torvalds 26505ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26511da177e4SLinus Torvalds if (stp == NULL) 26523e772463SJ. Bruce Fields return nfserr_jukebox; 26531da177e4SLinus Torvalds 26540c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 26551da177e4SLinus Torvalds if (status) { 26565ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 26571da177e4SLinus Torvalds return status; 26581da177e4SLinus Torvalds } 26591da177e4SLinus Torvalds *stpp = stp; 26601da177e4SLinus Torvalds return 0; 26611da177e4SLinus Torvalds } 26621da177e4SLinus Torvalds 2663b37ad28bSAl Viro static inline __be32 26641da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 26651da177e4SLinus Torvalds struct nfsd4_open *open) 26661da177e4SLinus Torvalds { 26671da177e4SLinus Torvalds struct iattr iattr = { 26681da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 26691da177e4SLinus Torvalds .ia_size = 0, 26701da177e4SLinus Torvalds }; 26711da177e4SLinus Torvalds if (!open->op_truncate) 26721da177e4SLinus Torvalds return 0; 26731da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 26749246585aSAl Viro return nfserr_inval; 26751da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 26761da177e4SLinus Torvalds } 26771da177e4SLinus Torvalds 2678b37ad28bSAl Viro static __be32 2679f9d7562fSJ. Bruce Fields nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 26801da177e4SLinus Torvalds { 26817d947842SJ. Bruce Fields u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; 26827d947842SJ. Bruce Fields bool new_access; 2683b37ad28bSAl Viro __be32 status; 26841da177e4SLinus Torvalds 26857d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2686f9d7562fSJ. Bruce Fields if (new_access) { 26870c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2688f9d7562fSJ. Bruce Fields if (status) 2689f9d7562fSJ. Bruce Fields return status; 26906c26d08fSJ. Bruce Fields } 26911da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 26921da177e4SLinus Torvalds if (status) { 2693f9d7562fSJ. Bruce Fields if (new_access) { 2694f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2695f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2696f9d7562fSJ. Bruce Fields } 26971da177e4SLinus Torvalds return status; 26981da177e4SLinus Torvalds } 26991da177e4SLinus Torvalds /* remember the open */ 270024a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2701b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 27021da177e4SLinus Torvalds 27031da177e4SLinus Torvalds return nfs_ok; 27041da177e4SLinus Torvalds } 27051da177e4SLinus Torvalds 27061da177e4SLinus Torvalds 27071da177e4SLinus Torvalds static void 270837515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 27091da177e4SLinus Torvalds { 27101da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 2711c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 27121da177e4SLinus Torvalds } 27131da177e4SLinus Torvalds 271414a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 271514a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 271614a24e99SJ. Bruce Fields { 271714a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 271814a24e99SJ. Bruce Fields return true; 271914a24e99SJ. Bruce Fields /* 272014a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 272114a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 272214a24e99SJ. Bruce Fields * until we hear otherwise: 272314a24e99SJ. Bruce Fields */ 272414a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 272514a24e99SJ. Bruce Fields } 272614a24e99SJ. Bruce Fields 272722d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 272822d38c4cSJ. Bruce Fields { 272922d38c4cSJ. Bruce Fields struct file_lock *fl; 273022d38c4cSJ. Bruce Fields 273122d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 273222d38c4cSJ. Bruce Fields if (!fl) 273322d38c4cSJ. Bruce Fields return NULL; 273422d38c4cSJ. Bruce Fields locks_init_lock(fl); 273522d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 273622d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 273722d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 273822d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2739acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 274022d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 274122d38c4cSJ. Bruce Fields return fl; 274222d38c4cSJ. Bruce Fields } 274322d38c4cSJ. Bruce Fields 2744edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2745edab9782SJ. Bruce Fields { 2746acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2747edab9782SJ. Bruce Fields struct file_lock *fl; 2748edab9782SJ. Bruce Fields int status; 2749edab9782SJ. Bruce Fields 2750edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2751edab9782SJ. Bruce Fields if (!fl) 2752edab9782SJ. Bruce Fields return -ENOMEM; 2753acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 2754acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); 2755acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2756edab9782SJ. Bruce Fields if (status) { 2757acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2758edab9782SJ. Bruce Fields locks_free_lock(fl); 2759edab9782SJ. Bruce Fields return -ENOMEM; 2760edab9782SJ. Bruce Fields } 2761acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2762acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2763acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2764acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2765acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2766acfdf5c3SJ. Bruce Fields return 0; 2767acfdf5c3SJ. Bruce Fields } 2768acfdf5c3SJ. Bruce Fields 2769acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2770acfdf5c3SJ. Bruce Fields { 2771acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2772acfdf5c3SJ. Bruce Fields 2773acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2774acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2775acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2776acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2777acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2778acfdf5c3SJ. Bruce Fields return -EAGAIN; 2779acfdf5c3SJ. Bruce Fields } 2780acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2781acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2782acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2783acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); 2784edab9782SJ. Bruce Fields return 0; 2785edab9782SJ. Bruce Fields } 2786edab9782SJ. Bruce Fields 27871da177e4SLinus Torvalds /* 27881da177e4SLinus Torvalds * Attempt to hand out a delegation. 27891da177e4SLinus Torvalds */ 27901da177e4SLinus Torvalds static void 27911da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 27921da177e4SLinus Torvalds { 27931da177e4SLinus Torvalds struct nfs4_delegation *dp; 27941da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 279514a24e99SJ. Bruce Fields int cb_up; 27961da177e4SLinus Torvalds int status, flag = 0; 27971da177e4SLinus Torvalds 279814a24e99SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(sop->so_client); 27991da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 28007b190fecSNeilBrown open->op_recall = 0; 28017b190fecSNeilBrown switch (open->op_claim_type) { 28027b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 28032bf23875SJ. Bruce Fields if (!cb_up) 28047b190fecSNeilBrown open->op_recall = 1; 28057b190fecSNeilBrown flag = open->op_delegate_type; 28067b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 28071da177e4SLinus Torvalds goto out; 28087b190fecSNeilBrown break; 28097b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 28107b190fecSNeilBrown /* Let's not give out any delegations till everyone's 28117b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2812af558e33SJ. Bruce Fields if (locks_in_grace()) 28137b190fecSNeilBrown goto out; 28142bf23875SJ. Bruce Fields if (!cb_up || !sop->so_confirmed) 28157b190fecSNeilBrown goto out; 28161da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 28171da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 28181da177e4SLinus Torvalds else 28191da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 28207b190fecSNeilBrown break; 28217b190fecSNeilBrown default: 28227b190fecSNeilBrown goto out; 28237b190fecSNeilBrown } 28241da177e4SLinus Torvalds 28251da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 2826dd239cc0SJ. Bruce Fields if (dp == NULL) 2827dd239cc0SJ. Bruce Fields goto out_no_deleg; 2828acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2829edab9782SJ. Bruce Fields if (status) 2830dd239cc0SJ. Bruce Fields goto out_free; 28311da177e4SLinus Torvalds 28321da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 28331da177e4SLinus Torvalds 28348c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 28358c10cbdbSBenny Halevy STATEID_VAL(&dp->dl_stateid)); 28361da177e4SLinus Torvalds out: 28377b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 28387b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 28397b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 28402fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 28411da177e4SLinus Torvalds open->op_delegate_type = flag; 2842dd239cc0SJ. Bruce Fields return; 2843dd239cc0SJ. Bruce Fields out_free: 2844acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2845dd239cc0SJ. Bruce Fields out_no_deleg: 2846dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2847dd239cc0SJ. Bruce Fields goto out; 28481da177e4SLinus Torvalds } 28491da177e4SLinus Torvalds 28501da177e4SLinus Torvalds /* 28511da177e4SLinus Torvalds * called with nfs4_lock_state() held. 28521da177e4SLinus Torvalds */ 2853b37ad28bSAl Viro __be32 28541da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 28551da177e4SLinus Torvalds { 28566668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 28571da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 28581da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 28591da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2860567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2861b37ad28bSAl Viro __be32 status; 28621da177e4SLinus Torvalds 28631da177e4SLinus Torvalds status = nfserr_inval; 2864d87a8adeSAndy Adamson if (!access_valid(open->op_share_access, resp->cstate.minorversion) 2865ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 28661da177e4SLinus Torvalds goto out; 28671da177e4SLinus Torvalds /* 28681da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 28691da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 28701da177e4SLinus Torvalds * If not found, create the nfs4_file struct 28711da177e4SLinus Torvalds */ 28721da177e4SLinus Torvalds fp = find_file(ino); 28731da177e4SLinus Torvalds if (fp) { 28741da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 28751da177e4SLinus Torvalds goto out; 2876c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2877c44c5eebSNeilBrown if (status) 2878c44c5eebSNeilBrown goto out; 28791da177e4SLinus Torvalds } else { 2880c44c5eebSNeilBrown status = nfserr_bad_stateid; 2881c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2882c44c5eebSNeilBrown goto out; 28833e772463SJ. Bruce Fields status = nfserr_jukebox; 28841da177e4SLinus Torvalds fp = alloc_init_file(ino); 28851da177e4SLinus Torvalds if (fp == NULL) 28861da177e4SLinus Torvalds goto out; 28871da177e4SLinus Torvalds } 28881da177e4SLinus Torvalds 28891da177e4SLinus Torvalds /* 28901da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 28911da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 28921da177e4SLinus Torvalds */ 28931da177e4SLinus Torvalds if (stp) { 28941da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 2895f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 28961da177e4SLinus Torvalds if (status) 28971da177e4SLinus Torvalds goto out; 2898444c2c07SNeilBrown update_stateid(&stp->st_stateid); 28991da177e4SLinus Torvalds } else { 2900f9d7562fSJ. Bruce Fields status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); 2901567d9829SNeilBrown if (status) 29021da177e4SLinus Torvalds goto out; 29031da177e4SLinus Torvalds init_stateid(stp, fp, open); 29041da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 29051da177e4SLinus Torvalds if (status) { 29062283963fSJ. Bruce Fields release_open_stateid(stp); 29071da177e4SLinus Torvalds goto out; 29081da177e4SLinus Torvalds } 29096668958fSAndy Adamson if (nfsd4_has_session(&resp->cstate)) 29106668958fSAndy Adamson update_stateid(&stp->st_stateid); 29111da177e4SLinus Torvalds } 29121da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 29131da177e4SLinus Torvalds 29144dc6ec00SJ. Bruce Fields if (nfsd4_has_session(&resp->cstate)) 29156668958fSAndy Adamson open->op_stateowner->so_confirmed = 1; 29166668958fSAndy Adamson 29171da177e4SLinus Torvalds /* 29181da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 29191da177e4SLinus Torvalds * OPEN succeeds even if we fail. 29201da177e4SLinus Torvalds */ 29211da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 29221da177e4SLinus Torvalds 29231da177e4SLinus Torvalds status = nfs_ok; 29241da177e4SLinus Torvalds 29258c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 29268c10cbdbSBenny Halevy STATEID_VAL(&stp->st_stateid)); 29271da177e4SLinus Torvalds out: 292813cd2184SNeilBrown if (fp) 292913cd2184SNeilBrown put_nfs4_file(fp); 293037515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 293137515177SNeilBrown nfs4_set_claim_prev(open); 29321da177e4SLinus Torvalds /* 29331da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 29341da177e4SLinus Torvalds */ 29351da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 29366668958fSAndy Adamson if (!open->op_stateowner->so_confirmed && 29376668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 29381da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 29391da177e4SLinus Torvalds 29401da177e4SLinus Torvalds return status; 29411da177e4SLinus Torvalds } 29421da177e4SLinus Torvalds 2943b37ad28bSAl Viro __be32 2944b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2945b591480bSJ.Bruce Fields clientid_t *clid) 29461da177e4SLinus Torvalds { 29471da177e4SLinus Torvalds struct nfs4_client *clp; 2948b37ad28bSAl Viro __be32 status; 29491da177e4SLinus Torvalds 29501da177e4SLinus Torvalds nfs4_lock_state(); 29511da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 29521da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 29531da177e4SLinus Torvalds status = nfserr_stale_clientid; 29541da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 29551da177e4SLinus Torvalds goto out; 29561da177e4SLinus Torvalds clp = find_confirmed_client(clid); 29571da177e4SLinus Torvalds status = nfserr_expired; 29581da177e4SLinus Torvalds if (clp == NULL) { 29591da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 29601da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 29611da177e4SLinus Torvalds goto out; 29621da177e4SLinus Torvalds } 29631da177e4SLinus Torvalds renew_client(clp); 29641da177e4SLinus Torvalds status = nfserr_cb_path_down; 2965ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 296677a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 29671da177e4SLinus Torvalds goto out; 29681da177e4SLinus Torvalds status = nfs_ok; 29691da177e4SLinus Torvalds out: 29701da177e4SLinus Torvalds nfs4_unlock_state(); 29711da177e4SLinus Torvalds return status; 29721da177e4SLinus Torvalds } 29731da177e4SLinus Torvalds 2974c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 2975af558e33SJ. Bruce Fields }; 2976af558e33SJ. Bruce Fields 2977a76b4319SNeilBrown static void 2978af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2979a76b4319SNeilBrown { 2980a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2981c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2982af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2983e46b498cSJ. Bruce Fields /* 2984e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 2985e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 2986e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 2987e46b498cSJ. Bruce Fields */ 2988e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 2989a76b4319SNeilBrown } 2990a76b4319SNeilBrown 2991fd39ca9aSNeilBrown static time_t 29921da177e4SLinus Torvalds nfs4_laundromat(void) 29931da177e4SLinus Torvalds { 29941da177e4SLinus Torvalds struct nfs4_client *clp; 29951da177e4SLinus Torvalds struct nfs4_stateowner *sop; 29961da177e4SLinus Torvalds struct nfs4_delegation *dp; 29971da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 2998cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 2999cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3000cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 30011da177e4SLinus Torvalds 30021da177e4SLinus Torvalds nfs4_lock_state(); 30031da177e4SLinus Torvalds 30041da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3005af558e33SJ. Bruce Fields if (locks_in_grace()) 3006af558e33SJ. Bruce Fields nfsd4_end_grace(); 300736acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 300836acb66bSBenny Halevy spin_lock(&client_lock); 30091da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 30101da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 30111da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 30121da177e4SLinus Torvalds t = clp->cl_time - cutoff; 30131da177e4SLinus Torvalds if (clientid_val > t) 30141da177e4SLinus Torvalds clientid_val = t; 30151da177e4SLinus Torvalds break; 30161da177e4SLinus Torvalds } 3017d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3018d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3019d7682988SBenny Halevy clp->cl_clientid.cl_id); 3020d7682988SBenny Halevy continue; 3021d7682988SBenny Halevy } 3022d7682988SBenny Halevy unhash_client_locked(clp); 3023d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 302436acb66bSBenny Halevy } 302536acb66bSBenny Halevy spin_unlock(&client_lock); 302636acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 302736acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 30281da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 30291da177e4SLinus Torvalds clp->cl_clientid.cl_id); 3030c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 30311da177e4SLinus Torvalds expire_client(clp); 30321da177e4SLinus Torvalds } 30331da177e4SLinus Torvalds spin_lock(&recall_lock); 30341da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 30351da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 30361da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 30371da177e4SLinus Torvalds u = dp->dl_time - cutoff; 30381da177e4SLinus Torvalds if (test_val > u) 30391da177e4SLinus Torvalds test_val = u; 30401da177e4SLinus Torvalds break; 30411da177e4SLinus Torvalds } 30421da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 30431da177e4SLinus Torvalds } 30441da177e4SLinus Torvalds spin_unlock(&recall_lock); 30451da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 30461da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 30471da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 30481da177e4SLinus Torvalds unhash_delegation(dp); 30491da177e4SLinus Torvalds } 3050cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 30511da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 30521da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 30531da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 30541da177e4SLinus Torvalds u = sop->so_time - cutoff; 30551da177e4SLinus Torvalds if (test_val > u) 30561da177e4SLinus Torvalds test_val = u; 30571da177e4SLinus Torvalds break; 30581da177e4SLinus Torvalds } 30591da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 30601da177e4SLinus Torvalds sop->so_id); 3061f044ff83SJ. Bruce Fields release_openowner(sop); 30621da177e4SLinus Torvalds } 30631da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 30641da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 30651da177e4SLinus Torvalds nfs4_unlock_state(); 30661da177e4SLinus Torvalds return clientid_val; 30671da177e4SLinus Torvalds } 30681da177e4SLinus Torvalds 3069a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3070a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3071a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3072a254b246SHarvey Harrison 3073a254b246SHarvey Harrison static void 3074c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 30751da177e4SLinus Torvalds { 30761da177e4SLinus Torvalds time_t t; 30771da177e4SLinus Torvalds 30781da177e4SLinus Torvalds t = nfs4_laundromat(); 30791da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 308058da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 30811da177e4SLinus Torvalds } 30821da177e4SLinus Torvalds 3083fd39ca9aSNeilBrown static struct nfs4_stateowner * 3084f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 3085f8816512SNeilBrown { 30861da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 30871da177e4SLinus Torvalds 30881da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 30891da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 30901da177e4SLinus Torvalds if (local->so_id == st_id) 30911da177e4SLinus Torvalds return local; 30921da177e4SLinus Torvalds } 30931da177e4SLinus Torvalds } 30941da177e4SLinus Torvalds return NULL; 30951da177e4SLinus Torvalds } 30961da177e4SLinus Torvalds 30971da177e4SLinus Torvalds static inline int 30981da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 30991da177e4SLinus Torvalds { 3100f9d7562fSJ. Bruce Fields return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; 31011da177e4SLinus Torvalds } 31021da177e4SLinus Torvalds 31031da177e4SLinus Torvalds static int 31041da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 31051da177e4SLinus Torvalds { 3106e4e83ea4SJ. Bruce Fields if (stateid->si_boot == boot_time) 3107e4e83ea4SJ. Bruce Fields return 0; 31088c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 31098c10cbdbSBenny Halevy STATEID_VAL(stateid)); 31101da177e4SLinus Torvalds return 1; 31111da177e4SLinus Torvalds } 31121da177e4SLinus Torvalds 31131da177e4SLinus Torvalds static inline int 31141da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 31151da177e4SLinus Torvalds { 31161da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 31171da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 31181da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 31191da177e4SLinus Torvalds } 31201da177e4SLinus Torvalds 31211da177e4SLinus Torvalds static inline int 31221da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 31231da177e4SLinus Torvalds { 31241da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 31251da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 31261da177e4SLinus Torvalds } 31271da177e4SLinus Torvalds 31281da177e4SLinus Torvalds static 3129b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 31301da177e4SLinus Torvalds { 3131b37ad28bSAl Viro __be32 status = nfserr_openmode; 31321da177e4SLinus Torvalds 313302921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 313402921914SJ. Bruce Fields if (stp->st_openstp) 313502921914SJ. Bruce Fields stp = stp->st_openstp; 31361da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 31371da177e4SLinus Torvalds goto out; 31381da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 31391da177e4SLinus Torvalds goto out; 31401da177e4SLinus Torvalds status = nfs_ok; 31411da177e4SLinus Torvalds out: 31421da177e4SLinus Torvalds return status; 31431da177e4SLinus Torvalds } 31441da177e4SLinus Torvalds 3145b37ad28bSAl Viro static inline __be32 31461da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 31471da177e4SLinus Torvalds { 3148203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 31491da177e4SLinus Torvalds return nfs_ok; 3150af558e33SJ. Bruce Fields else if (locks_in_grace()) { 315125985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 31521da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 31531da177e4SLinus Torvalds return nfserr_grace; 31541da177e4SLinus Torvalds } else if (flags & WR_STATE) 31551da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 31561da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 31571da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 31581da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 31591da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 31601da177e4SLinus Torvalds } 31611da177e4SLinus Torvalds 31621da177e4SLinus Torvalds /* 31631da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 31641da177e4SLinus Torvalds * that are not able to provide mandatory locking. 31651da177e4SLinus Torvalds */ 31661da177e4SLinus Torvalds static inline int 316718f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 31681da177e4SLinus Torvalds { 3169203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 31701da177e4SLinus Torvalds } 31711da177e4SLinus Torvalds 317228dde241SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 31730836f587SJ. Bruce Fields { 31746668958fSAndy Adamson /* 31756668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 31766668958fSAndy Adamson * when it is zero. 31776668958fSAndy Adamson */ 317828dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 31796668958fSAndy Adamson goto out; 31806668958fSAndy Adamson 31810836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 31820836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 31830836f587SJ. Bruce Fields return nfserr_bad_stateid; 31840836f587SJ. Bruce Fields /* 31850836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 31860836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 31870836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 31880836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 31890836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 31900836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 31910836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 31920836f587SJ. Bruce Fields * will just have to retry the IO: 31930836f587SJ. Bruce Fields */ 31940836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 31950836f587SJ. Bruce Fields return nfserr_old_stateid; 31966668958fSAndy Adamson out: 31970836f587SJ. Bruce Fields return nfs_ok; 31980836f587SJ. Bruce Fields } 31990836f587SJ. Bruce Fields 32003e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 32013e633079SJ. Bruce Fields { 32023e633079SJ. Bruce Fields return stateid->si_fileid == 0; 32033e633079SJ. Bruce Fields } 32043e633079SJ. Bruce Fields 320528dde241SJ. Bruce Fields __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) 320617456804SBryan Schumaker { 320717456804SBryan Schumaker struct nfs4_stateid *stp = NULL; 320817456804SBryan Schumaker __be32 status = nfserr_stale_stateid; 320917456804SBryan Schumaker 321017456804SBryan Schumaker if (STALE_STATEID(stateid)) 321117456804SBryan Schumaker goto out; 321217456804SBryan Schumaker 321317456804SBryan Schumaker status = nfserr_expired; 321417456804SBryan Schumaker stp = search_for_stateid(stateid); 321517456804SBryan Schumaker if (!stp) 321617456804SBryan Schumaker goto out; 321717456804SBryan Schumaker status = nfserr_bad_stateid; 321817456804SBryan Schumaker 321917456804SBryan Schumaker if (!stp->st_stateowner->so_confirmed) 322017456804SBryan Schumaker goto out; 322117456804SBryan Schumaker 322228dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid, has_session); 322317456804SBryan Schumaker if (status) 322417456804SBryan Schumaker goto out; 322517456804SBryan Schumaker 322617456804SBryan Schumaker status = nfs_ok; 322717456804SBryan Schumaker out: 322817456804SBryan Schumaker return status; 322917456804SBryan Schumaker } 323017456804SBryan Schumaker 32311da177e4SLinus Torvalds /* 32321da177e4SLinus Torvalds * Checks for stateid operations 32331da177e4SLinus Torvalds */ 3234b37ad28bSAl Viro __be32 3235dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3236dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 32371da177e4SLinus Torvalds { 32381da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 32391da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3240dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 32411da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3242b37ad28bSAl Viro __be32 status; 32431da177e4SLinus Torvalds 32441da177e4SLinus Torvalds if (filpp) 32451da177e4SLinus Torvalds *filpp = NULL; 32461da177e4SLinus Torvalds 324718f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 32481da177e4SLinus Torvalds return nfserr_grace; 32491da177e4SLinus Torvalds 32501da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 32511da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 32521da177e4SLinus Torvalds 32531da177e4SLinus Torvalds status = nfserr_stale_stateid; 32541da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 32551da177e4SLinus Torvalds goto out; 32561da177e4SLinus Torvalds 325733515142SJ. Bruce Fields /* 325833515142SJ. Bruce Fields * We assume that any stateid that has the current boot time, 325933515142SJ. Bruce Fields * but that we can't find, is expired: 326033515142SJ. Bruce Fields */ 326133515142SJ. Bruce Fields status = nfserr_expired; 32623e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 3263a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 3264e4e83ea4SJ. Bruce Fields if (!dp) 32651da177e4SLinus Torvalds goto out; 326628dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); 32670c2a498fSJ. Bruce Fields if (status) 32680c2a498fSJ. Bruce Fields goto out; 3269dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3270dc9bf700SJ. Bruce Fields if (status) 3271dc9bf700SJ. Bruce Fields goto out; 3272dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 327343b0178eSDan Carpenter if (filpp) { 3274acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3275f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 327643b0178eSDan Carpenter } 32771da177e4SLinus Torvalds } else { /* open or lock stateid */ 3278a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 3279e4e83ea4SJ. Bruce Fields if (!stp) 32801da177e4SLinus Torvalds goto out; 328133515142SJ. Bruce Fields status = nfserr_bad_stateid; 32826150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 32831da177e4SLinus Torvalds goto out; 32841da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 32851da177e4SLinus Torvalds goto out; 32866668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, 328728dde241SJ. Bruce Fields nfsd4_has_session(cstate)); 32880836f587SJ. Bruce Fields if (status) 32891da177e4SLinus Torvalds goto out; 3290a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3291a4455be0SJ. Bruce Fields if (status) 32921da177e4SLinus Torvalds goto out; 32931da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 3294f9d7562fSJ. Bruce Fields if (filpp) { 3295f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3296f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3297f9d7562fSJ. Bruce Fields else 3298f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3299f9d7562fSJ. Bruce Fields } 33001da177e4SLinus Torvalds } 33011da177e4SLinus Torvalds status = nfs_ok; 33021da177e4SLinus Torvalds out: 33031da177e4SLinus Torvalds return status; 33041da177e4SLinus Torvalds } 33051da177e4SLinus Torvalds 3306e1ca12dfSBryan Schumaker static __be32 3307e1ca12dfSBryan Schumaker nfsd4_free_delegation_stateid(stateid_t *stateid) 3308e1ca12dfSBryan Schumaker { 3309e1ca12dfSBryan Schumaker struct nfs4_delegation *dp = search_for_delegation(stateid); 3310e1ca12dfSBryan Schumaker if (dp) 3311e1ca12dfSBryan Schumaker return nfserr_locks_held; 3312e1ca12dfSBryan Schumaker return nfserr_bad_stateid; 3313e1ca12dfSBryan Schumaker } 3314e1ca12dfSBryan Schumaker 3315e1ca12dfSBryan Schumaker static __be32 3316e1ca12dfSBryan Schumaker nfsd4_free_lock_stateid(struct nfs4_stateid *stp) 3317e1ca12dfSBryan Schumaker { 3318e1ca12dfSBryan Schumaker if (check_for_locks(stp->st_file, stp->st_stateowner)) 3319e1ca12dfSBryan Schumaker return nfserr_locks_held; 3320e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3321e1ca12dfSBryan Schumaker return nfs_ok; 3322e1ca12dfSBryan Schumaker } 3323e1ca12dfSBryan Schumaker 3324e1ca12dfSBryan Schumaker /* 332517456804SBryan Schumaker * Test if the stateid is valid 332617456804SBryan Schumaker */ 332717456804SBryan Schumaker __be32 332817456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 332917456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 333017456804SBryan Schumaker { 333117456804SBryan Schumaker test_stateid->ts_has_session = nfsd4_has_session(cstate); 333217456804SBryan Schumaker return nfs_ok; 333317456804SBryan Schumaker } 333417456804SBryan Schumaker 333517456804SBryan Schumaker /* 3336e1ca12dfSBryan Schumaker * Free a state id 3337e1ca12dfSBryan Schumaker */ 3338e1ca12dfSBryan Schumaker __be32 3339e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3340e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3341e1ca12dfSBryan Schumaker { 3342e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 3343e1ca12dfSBryan Schumaker struct nfs4_stateid *stp; 3344e1ca12dfSBryan Schumaker __be32 ret; 3345e1ca12dfSBryan Schumaker 3346e1ca12dfSBryan Schumaker nfs4_lock_state(); 3347e1ca12dfSBryan Schumaker if (is_delegation_stateid(stateid)) { 3348e1ca12dfSBryan Schumaker ret = nfsd4_free_delegation_stateid(stateid); 3349e1ca12dfSBryan Schumaker goto out; 3350e1ca12dfSBryan Schumaker } 3351e1ca12dfSBryan Schumaker 3352e1ca12dfSBryan Schumaker stp = search_for_stateid(stateid); 3353e1ca12dfSBryan Schumaker if (!stp) { 3354e1ca12dfSBryan Schumaker ret = nfserr_bad_stateid; 3355e1ca12dfSBryan Schumaker goto out; 3356e1ca12dfSBryan Schumaker } 3357e1ca12dfSBryan Schumaker if (stateid->si_generation != 0) { 3358e1ca12dfSBryan Schumaker if (stateid->si_generation < stp->st_stateid.si_generation) { 3359e1ca12dfSBryan Schumaker ret = nfserr_old_stateid; 3360e1ca12dfSBryan Schumaker goto out; 3361e1ca12dfSBryan Schumaker } 3362e1ca12dfSBryan Schumaker if (stateid->si_generation > stp->st_stateid.si_generation) { 3363e1ca12dfSBryan Schumaker ret = nfserr_bad_stateid; 3364e1ca12dfSBryan Schumaker goto out; 3365e1ca12dfSBryan Schumaker } 3366e1ca12dfSBryan Schumaker } 3367e1ca12dfSBryan Schumaker 33685fa0bbb4SJ. Bruce Fields if (stp->st_type == NFS4_OPEN_STID) { 3369e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3370e1ca12dfSBryan Schumaker goto out; 3371e1ca12dfSBryan Schumaker } else { 3372e1ca12dfSBryan Schumaker ret = nfsd4_free_lock_stateid(stp); 3373e1ca12dfSBryan Schumaker goto out; 3374e1ca12dfSBryan Schumaker } 3375e1ca12dfSBryan Schumaker 3376e1ca12dfSBryan Schumaker out: 3377e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3378e1ca12dfSBryan Schumaker return ret; 3379e1ca12dfSBryan Schumaker } 3380e1ca12dfSBryan Schumaker 33814c4cd222SNeilBrown static inline int 33824c4cd222SNeilBrown setlkflg (int type) 33834c4cd222SNeilBrown { 33844c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 33854c4cd222SNeilBrown RD_STATE : WR_STATE; 33864c4cd222SNeilBrown } 33871da177e4SLinus Torvalds 33881da177e4SLinus Torvalds /* 33891da177e4SLinus Torvalds * Checks for sequence id mutating operations. 33901da177e4SLinus Torvalds */ 3391b37ad28bSAl Viro static __be32 3392dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 3393dd453dfdSBenny Halevy stateid_t *stateid, int flags, 3394dd453dfdSBenny Halevy struct nfs4_stateowner **sopp, 3395b34f27aaSJ. Bruce Fields struct nfs4_stateid **stpp) 33961da177e4SLinus Torvalds { 33971da177e4SLinus Torvalds struct nfs4_stateid *stp; 33981da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3399dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34000836f587SJ. Bruce Fields __be32 status; 34011da177e4SLinus Torvalds 34028c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 34038c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 34041da177e4SLinus Torvalds 34051da177e4SLinus Torvalds *stpp = NULL; 34061da177e4SLinus Torvalds *sopp = NULL; 34071da177e4SLinus Torvalds 34081da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 34092fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 34103a4f98bbSNeilBrown return nfserr_bad_stateid; 34111da177e4SLinus Torvalds } 34121da177e4SLinus Torvalds 34131da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 34143a4f98bbSNeilBrown return nfserr_stale_stateid; 34156668958fSAndy Adamson 34161da177e4SLinus Torvalds /* 34171da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 34181da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 34191da177e4SLinus Torvalds * number is incorrect. 34201da177e4SLinus Torvalds */ 3421f8816512SNeilBrown stp = find_stateid(stateid, flags); 3422f8816512SNeilBrown if (stp == NULL) { 3423f8816512SNeilBrown /* 3424f8816512SNeilBrown * Also, we should make sure this isn't just the result of 3425f8816512SNeilBrown * a replayed close: 3426f8816512SNeilBrown */ 3427f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 342833515142SJ. Bruce Fields /* It's not stale; let's assume it's expired: */ 3429f8816512SNeilBrown if (sop == NULL) 343033515142SJ. Bruce Fields return nfserr_expired; 3431f8816512SNeilBrown *sopp = sop; 3432f8816512SNeilBrown goto check_replay; 3433f8816512SNeilBrown } 34341da177e4SLinus Torvalds 343539325bd0SJ. Bruce Fields *stpp = stp; 343639325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 343739325bd0SJ. Bruce Fields 3438f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 34392fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 34403a4f98bbSNeilBrown return nfserr_bad_stateid; 34411da177e4SLinus Torvalds } 34421da177e4SLinus Torvalds 34431da177e4SLinus Torvalds /* 34441da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 34451da177e4SLinus Torvalds * For the moment, we ignore the possibility of 34461da177e4SLinus Torvalds * generation number wraparound. 34471da177e4SLinus Torvalds */ 344828dde241SJ. Bruce Fields if (!nfsd4_has_session(cstate) && seqid != sop->so_seqid) 34491da177e4SLinus Torvalds goto check_replay; 34501da177e4SLinus Torvalds 34513a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 34522fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 34533a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 34543a4f98bbSNeilBrown return nfserr_bad_stateid; 34551da177e4SLinus Torvalds } 34563a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 34572fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 34583a4f98bbSNeilBrown " confirmed yet!\n"); 34593a4f98bbSNeilBrown return nfserr_bad_stateid; 34601da177e4SLinus Torvalds } 346128dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid, nfsd4_has_session(cstate)); 34620836f587SJ. Bruce Fields if (status) 34630836f587SJ. Bruce Fields return status; 346452fd004eSNeilBrown renew_client(sop->so_client); 34653a4f98bbSNeilBrown return nfs_ok; 34661da177e4SLinus Torvalds 34671da177e4SLinus Torvalds check_replay: 3468bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 3469849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 34701da177e4SLinus Torvalds /* indicate replay to calling function */ 3471a90b061cSAl Viro return nfserr_replay_me; 34721da177e4SLinus Torvalds } 34732fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 34743a4f98bbSNeilBrown sop->so_seqid, seqid); 34753a4f98bbSNeilBrown *sopp = NULL; 34763a4f98bbSNeilBrown return nfserr_bad_seqid; 34771da177e4SLinus Torvalds } 34781da177e4SLinus Torvalds 3479b37ad28bSAl Viro __be32 3480ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3481a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 34821da177e4SLinus Torvalds { 3483b37ad28bSAl Viro __be32 status; 34841da177e4SLinus Torvalds struct nfs4_stateowner *sop; 34851da177e4SLinus Torvalds struct nfs4_stateid *stp; 34861da177e4SLinus Torvalds 34871da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3488ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3489ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 34901da177e4SLinus Torvalds 3491ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3492a8cddc5dSJ. Bruce Fields if (status) 3493a8cddc5dSJ. Bruce Fields return status; 34941da177e4SLinus Torvalds 34951da177e4SLinus Torvalds nfs4_lock_state(); 34961da177e4SLinus Torvalds 3497dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3498ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 3499f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 3500b34f27aaSJ. Bruce Fields &oc->oc_stateowner, &stp))) 35011da177e4SLinus Torvalds goto out; 35021da177e4SLinus Torvalds 35031da177e4SLinus Torvalds sop = oc->oc_stateowner; 35041da177e4SLinus Torvalds sop->so_confirmed = 1; 35051da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 35061da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 35078c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 35088c10cbdbSBenny Halevy __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); 3509c7b9a459SNeilBrown 3510c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 35111da177e4SLinus Torvalds out: 3512f2327d9aSNeil Brown if (oc->oc_stateowner) { 35131da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 3514a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 3515f2327d9aSNeil Brown } 35161da177e4SLinus Torvalds nfs4_unlock_state(); 35171da177e4SLinus Torvalds return status; 35181da177e4SLinus Torvalds } 35191da177e4SLinus Torvalds 3520f197c271SJ. Bruce Fields static inline void nfs4_file_downgrade(struct nfs4_stateid *stp, unsigned int to_access) 35211da177e4SLinus Torvalds { 35221da177e4SLinus Torvalds int i; 3523f197c271SJ. Bruce Fields 35241da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 3525f197c271SJ. Bruce Fields if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { 3526f197c271SJ. Bruce Fields nfs4_file_put_access(stp->st_file, i); 3527f197c271SJ. Bruce Fields __clear_bit(i, &stp->st_access_bmap); 3528f197c271SJ. Bruce Fields } 35291da177e4SLinus Torvalds } 35301da177e4SLinus Torvalds } 35311da177e4SLinus Torvalds 35321da177e4SLinus Torvalds static void 35331da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 35341da177e4SLinus Torvalds { 35351da177e4SLinus Torvalds int i; 35361da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 35371da177e4SLinus Torvalds if ((i & deny) != i) 35381da177e4SLinus Torvalds __clear_bit(i, bmap); 35391da177e4SLinus Torvalds } 35401da177e4SLinus Torvalds } 35411da177e4SLinus Torvalds 3542b37ad28bSAl Viro __be32 3543ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3544ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3545a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 35461da177e4SLinus Torvalds { 3547b37ad28bSAl Viro __be32 status; 35481da177e4SLinus Torvalds struct nfs4_stateid *stp; 35491da177e4SLinus Torvalds 35501da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3551ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3552ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 35531da177e4SLinus Torvalds 3554d87a8adeSAndy Adamson if (!access_valid(od->od_share_access, cstate->minorversion) 3555ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 35561da177e4SLinus Torvalds return nfserr_inval; 35571da177e4SLinus Torvalds 35581da177e4SLinus Torvalds nfs4_lock_state(); 3559dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3560ca364317SJ.Bruce Fields od->od_seqid, 35611da177e4SLinus Torvalds &od->od_stateid, 3562f3362737SJ. Bruce Fields OPEN_STATE, 3563b34f27aaSJ. Bruce Fields &od->od_stateowner, &stp))) 35641da177e4SLinus Torvalds goto out; 35651da177e4SLinus Torvalds 35661da177e4SLinus Torvalds status = nfserr_inval; 35671da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 35681da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 35691da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 35701da177e4SLinus Torvalds goto out; 35711da177e4SLinus Torvalds } 35721da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 35731da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 35741da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 35751da177e4SLinus Torvalds goto out; 35761da177e4SLinus Torvalds } 3577f197c271SJ. Bruce Fields nfs4_file_downgrade(stp, od->od_share_access); 35781da177e4SLinus Torvalds 35791da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 35801da177e4SLinus Torvalds 35811da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 35821da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 35831da177e4SLinus Torvalds status = nfs_ok; 35841da177e4SLinus Torvalds out: 3585f2327d9aSNeil Brown if (od->od_stateowner) { 35861da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 3587a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 3588f2327d9aSNeil Brown } 35891da177e4SLinus Torvalds nfs4_unlock_state(); 35901da177e4SLinus Torvalds return status; 35911da177e4SLinus Torvalds } 35921da177e4SLinus Torvalds 35931da177e4SLinus Torvalds /* 35941da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 35951da177e4SLinus Torvalds */ 3596b37ad28bSAl Viro __be32 3597ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3598a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 35991da177e4SLinus Torvalds { 3600b37ad28bSAl Viro __be32 status; 36011da177e4SLinus Torvalds struct nfs4_stateid *stp; 36021da177e4SLinus Torvalds 36031da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3604ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3605ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36061da177e4SLinus Torvalds 36071da177e4SLinus Torvalds nfs4_lock_state(); 36081da177e4SLinus Torvalds /* check close_lru for replay */ 3609dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3610ca364317SJ.Bruce Fields close->cl_seqid, 36111da177e4SLinus Torvalds &close->cl_stateid, 3612f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 3613b34f27aaSJ. Bruce Fields &close->cl_stateowner, &stp))) 36141da177e4SLinus Torvalds goto out; 36151da177e4SLinus Torvalds status = nfs_ok; 36161da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 36171da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 36181da177e4SLinus Torvalds 361904ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 36202283963fSJ. Bruce Fields release_open_stateid(stp); 362104ef5954SJ. Bruce Fields 362204ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 362304ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 362404ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 362504ef5954SJ. Bruce Fields */ 362604ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 362704ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 36281da177e4SLinus Torvalds out: 3629f2327d9aSNeil Brown if (close->cl_stateowner) { 36301da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 3631a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 3632f2327d9aSNeil Brown } 36331da177e4SLinus Torvalds nfs4_unlock_state(); 36341da177e4SLinus Torvalds return status; 36351da177e4SLinus Torvalds } 36361da177e4SLinus Torvalds 3637b37ad28bSAl Viro __be32 3638ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3639ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 36401da177e4SLinus Torvalds { 3641203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3642203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 3643203a8c8eSJ. Bruce Fields struct inode *inode; 3644b37ad28bSAl Viro __be32 status; 36451da177e4SLinus Torvalds 3646ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3647203a8c8eSJ. Bruce Fields return status; 3648203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 36491da177e4SLinus Torvalds 36501da177e4SLinus Torvalds nfs4_lock_state(); 3651203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 3652203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3653203a8c8eSJ. Bruce Fields goto out; 3654203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 3655203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 3656203a8c8eSJ. Bruce Fields goto out; 36577e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 3658203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 3659203a8c8eSJ. Bruce Fields goto out; 366033515142SJ. Bruce Fields status = nfserr_expired; 3661203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 3662e4e83ea4SJ. Bruce Fields if (!dp) 3663203a8c8eSJ. Bruce Fields goto out; 366428dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); 3665203a8c8eSJ. Bruce Fields if (status) 3666203a8c8eSJ. Bruce Fields goto out; 3667203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 3668203a8c8eSJ. Bruce Fields 3669203a8c8eSJ. Bruce Fields unhash_delegation(dp); 36701da177e4SLinus Torvalds out: 3671203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3672203a8c8eSJ. Bruce Fields 36731da177e4SLinus Torvalds return status; 36741da177e4SLinus Torvalds } 36751da177e4SLinus Torvalds 36761da177e4SLinus Torvalds 36771da177e4SLinus Torvalds /* 36781da177e4SLinus Torvalds * Lock owner state (byte-range locks) 36791da177e4SLinus Torvalds */ 36801da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 36811da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 36821da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 36831da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 36841da177e4SLinus Torvalds 368587df4de8SBenny Halevy static inline u64 368687df4de8SBenny Halevy end_offset(u64 start, u64 len) 368787df4de8SBenny Halevy { 368887df4de8SBenny Halevy u64 end; 368987df4de8SBenny Halevy 369087df4de8SBenny Halevy end = start + len; 369187df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 369287df4de8SBenny Halevy } 369387df4de8SBenny Halevy 369487df4de8SBenny Halevy /* last octet in a range */ 369587df4de8SBenny Halevy static inline u64 369687df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 369787df4de8SBenny Halevy { 369887df4de8SBenny Halevy u64 end; 369987df4de8SBenny Halevy 370087df4de8SBenny Halevy BUG_ON(!len); 370187df4de8SBenny Halevy end = start + len; 370287df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 370387df4de8SBenny Halevy } 370487df4de8SBenny Halevy 3705ddc04c41SJ. Bruce Fields static unsigned int lockownerid_hashval(u32 id) 3706ddc04c41SJ. Bruce Fields { 3707ddc04c41SJ. Bruce Fields return id & LOCK_HASH_MASK; 3708ddc04c41SJ. Bruce Fields } 37091da177e4SLinus Torvalds 37101da177e4SLinus Torvalds static inline unsigned int 37111da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 37121da177e4SLinus Torvalds struct xdr_netobj *ownername) 37131da177e4SLinus Torvalds { 37141da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 37151da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 37161da177e4SLinus Torvalds & LOCK_HASH_MASK; 37171da177e4SLinus Torvalds } 37181da177e4SLinus Torvalds 37191da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 37201da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 37211da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 37221da177e4SLinus Torvalds 3723e1ca12dfSBryan Schumaker static int 3724e1ca12dfSBryan Schumaker same_stateid(stateid_t *id_one, stateid_t *id_two) 3725e1ca12dfSBryan Schumaker { 3726e1ca12dfSBryan Schumaker if (id_one->si_stateownerid != id_two->si_stateownerid) 3727e1ca12dfSBryan Schumaker return 0; 3728e1ca12dfSBryan Schumaker return id_one->si_fileid == id_two->si_fileid; 3729e1ca12dfSBryan Schumaker } 3730e1ca12dfSBryan Schumaker 3731fd39ca9aSNeilBrown static struct nfs4_stateid * 37321da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 37331da177e4SLinus Torvalds { 37349346eff0SKrishna Kumar struct nfs4_stateid *local; 37351da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 37361da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 37371da177e4SLinus Torvalds unsigned int hashval; 37381da177e4SLinus Torvalds 37391da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 37409346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 37411da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 37421da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 37431da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 37441da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 37451da177e4SLinus Torvalds return local; 37461da177e4SLinus Torvalds } 37471da177e4SLinus Torvalds } 37489346eff0SKrishna Kumar 37499346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 37501da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 37511da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 37521da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 37531da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 37541da177e4SLinus Torvalds return local; 37551da177e4SLinus Torvalds } 3756849823c5SNeil Brown } 37571da177e4SLinus Torvalds return NULL; 37581da177e4SLinus Torvalds } 37591da177e4SLinus Torvalds 3760e1ca12dfSBryan Schumaker static struct nfs4_stateid * 3761e1ca12dfSBryan Schumaker search_for_stateid(stateid_t *stid) 3762e1ca12dfSBryan Schumaker { 3763e1ca12dfSBryan Schumaker struct nfs4_stateid *local; 3764e1ca12dfSBryan Schumaker unsigned int hashval = stateid_hashval(stid->si_stateownerid, stid->si_fileid); 3765e1ca12dfSBryan Schumaker 3766e1ca12dfSBryan Schumaker list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 3767e1ca12dfSBryan Schumaker if (same_stateid(&local->st_stateid, stid)) 3768e1ca12dfSBryan Schumaker return local; 3769e1ca12dfSBryan Schumaker } 3770e1ca12dfSBryan Schumaker 3771e1ca12dfSBryan Schumaker list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 3772e1ca12dfSBryan Schumaker if (same_stateid(&local->st_stateid, stid)) 3773e1ca12dfSBryan Schumaker return local; 3774e1ca12dfSBryan Schumaker } 3775e1ca12dfSBryan Schumaker return NULL; 3776e1ca12dfSBryan Schumaker } 3777e1ca12dfSBryan Schumaker 3778e1ca12dfSBryan Schumaker static struct nfs4_delegation * 3779e1ca12dfSBryan Schumaker search_for_delegation(stateid_t *stid) 3780e1ca12dfSBryan Schumaker { 3781e1ca12dfSBryan Schumaker struct nfs4_file *fp; 3782e1ca12dfSBryan Schumaker struct nfs4_delegation *dp; 3783e1ca12dfSBryan Schumaker struct list_head *pos; 3784e1ca12dfSBryan Schumaker int i; 3785e1ca12dfSBryan Schumaker 3786e1ca12dfSBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 3787e1ca12dfSBryan Schumaker list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { 3788e1ca12dfSBryan Schumaker list_for_each(pos, &fp->fi_delegations) { 3789e1ca12dfSBryan Schumaker dp = list_entry(pos, struct nfs4_delegation, dl_perfile); 3790e1ca12dfSBryan Schumaker if (same_stateid(&dp->dl_stateid, stid)) 3791e1ca12dfSBryan Schumaker return dp; 3792e1ca12dfSBryan Schumaker } 3793e1ca12dfSBryan Schumaker } 3794e1ca12dfSBryan Schumaker } 3795e1ca12dfSBryan Schumaker return NULL; 3796e1ca12dfSBryan Schumaker } 3797e1ca12dfSBryan Schumaker 37981da177e4SLinus Torvalds static struct nfs4_delegation * 37991da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 38001da177e4SLinus Torvalds { 380113cd2184SNeilBrown struct nfs4_file *fp; 380213cd2184SNeilBrown struct nfs4_delegation *dl; 38031da177e4SLinus Torvalds 38048c10cbdbSBenny Halevy dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, 38058c10cbdbSBenny Halevy STATEID_VAL(stid)); 38061da177e4SLinus Torvalds 38071da177e4SLinus Torvalds fp = find_file(ino); 380813cd2184SNeilBrown if (!fp) 38091da177e4SLinus Torvalds return NULL; 381013cd2184SNeilBrown dl = find_delegation_file(fp, stid); 381113cd2184SNeilBrown put_nfs4_file(fp); 381213cd2184SNeilBrown return dl; 38131da177e4SLinus Torvalds } 38141da177e4SLinus Torvalds 38151da177e4SLinus Torvalds /* 38161da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38171da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38181da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38191da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38201da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 38211da177e4SLinus Torvalds * the VFS, but this is a very deep change! 38221da177e4SLinus Torvalds */ 38231da177e4SLinus Torvalds static inline void 38241da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 38251da177e4SLinus Torvalds { 38261da177e4SLinus Torvalds if (lock->fl_start < 0) 38271da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 38281da177e4SLinus Torvalds if (lock->fl_end < 0) 38291da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 38301da177e4SLinus Torvalds } 38311da177e4SLinus Torvalds 3832d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3833d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 38347b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3835d5b9026aSNeilBrown }; 38361da177e4SLinus Torvalds 38371da177e4SLinus Torvalds static inline void 38381da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 38391da177e4SLinus Torvalds { 3840d5b9026aSNeilBrown struct nfs4_stateowner *sop; 38411da177e4SLinus Torvalds 3842d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3843d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 38441da177e4SLinus Torvalds kref_get(&sop->so_ref); 38451da177e4SLinus Torvalds deny->ld_sop = sop; 38461da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 3847d5b9026aSNeilBrown } else { 3848d5b9026aSNeilBrown deny->ld_sop = NULL; 3849d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3850d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 38511da177e4SLinus Torvalds } 38521da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 385387df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 385487df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 38551da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 38561da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 38571da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 38581da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 38591da177e4SLinus Torvalds } 38601da177e4SLinus Torvalds 38611da177e4SLinus Torvalds static struct nfs4_stateowner * 38621da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 38631da177e4SLinus Torvalds struct xdr_netobj *owner) 38641da177e4SLinus Torvalds { 38651da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 38661da177e4SLinus Torvalds struct nfs4_stateowner *op; 38671da177e4SLinus Torvalds 38681da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3869599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 38701da177e4SLinus Torvalds return op; 38711da177e4SLinus Torvalds } 38721da177e4SLinus Torvalds return NULL; 38731da177e4SLinus Torvalds } 38741da177e4SLinus Torvalds 3875ff194bd9SJ. Bruce Fields static void hash_lockowner(struct nfs4_stateowner *sop, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp) 3876ff194bd9SJ. Bruce Fields { 3877ff194bd9SJ. Bruce Fields unsigned int idhashval; 3878ff194bd9SJ. Bruce Fields 3879ff194bd9SJ. Bruce Fields idhashval = lockownerid_hashval(sop->so_id); 3880ff194bd9SJ. Bruce Fields list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 3881ff194bd9SJ. Bruce Fields list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3882ff194bd9SJ. Bruce Fields list_add(&sop->so_perstateid, &open_stp->st_lockowners); 3883ff194bd9SJ. Bruce Fields } 3884ff194bd9SJ. Bruce Fields 38851da177e4SLinus Torvalds /* 38861da177e4SLinus Torvalds * Alloc a lock owner structure. 38871da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 388825985edcSLucas De Marchi * occurred. 38891da177e4SLinus Torvalds * 38901da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 38911da177e4SLinus Torvalds */ 38921da177e4SLinus Torvalds 38931da177e4SLinus Torvalds static struct nfs4_stateowner * 38941da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 38951da177e4SLinus Torvalds struct nfs4_stateowner *sop; 38961da177e4SLinus Torvalds 3897ff194bd9SJ. Bruce Fields sop = alloc_stateowner(&lock->lk_new_owner, clp); 3898ff194bd9SJ. Bruce Fields if (!sop) 38991da177e4SLinus Torvalds return NULL; 3900ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 39011da177e4SLinus Torvalds sop->so_is_open_owner = 0; 3902b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3903b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3904b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 39051da177e4SLinus Torvalds sop->so_confirmed = 1; 3906ff194bd9SJ. Bruce Fields hash_lockowner(sop, strhashval, clp, open_stp); 39071da177e4SLinus Torvalds return sop; 39081da177e4SLinus Torvalds } 39091da177e4SLinus Torvalds 3910fd39ca9aSNeilBrown static struct nfs4_stateid * 39111da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 39121da177e4SLinus Torvalds { 39131da177e4SLinus Torvalds struct nfs4_stateid *stp; 39141da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 39151da177e4SLinus Torvalds 39165ac049acSNeilBrown stp = nfs4_alloc_stateid(); 39175ac049acSNeilBrown if (stp == NULL) 39181da177e4SLinus Torvalds goto out; 39191da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 39201da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3921ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3922ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 39231da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 39248beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3925ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 39261da177e4SLinus Torvalds stp->st_stateowner = sop; 39275fa0bbb4SJ. Bruce Fields stp->st_type = NFS4_LOCK_STID; 392813cd2184SNeilBrown get_nfs4_file(fp); 39291da177e4SLinus Torvalds stp->st_file = fp; 3930e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 39311da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 39321da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 39331da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 39340997b173SJ. Bruce Fields stp->st_access_bmap = 0; 39351da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 39364c4cd222SNeilBrown stp->st_openstp = open_stp; 39371da177e4SLinus Torvalds 39381da177e4SLinus Torvalds out: 39391da177e4SLinus Torvalds return stp; 39401da177e4SLinus Torvalds } 39411da177e4SLinus Torvalds 3942fd39ca9aSNeilBrown static int 39431da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 39441da177e4SLinus Torvalds { 394587df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 39461da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 39471da177e4SLinus Torvalds } 39481da177e4SLinus Torvalds 39490997b173SJ. Bruce Fields static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) 39500997b173SJ. Bruce Fields { 39510997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 39520997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 39530997b173SJ. Bruce Fields 39540997b173SJ. Bruce Fields if (test_bit(access, &lock_stp->st_access_bmap)) 39550997b173SJ. Bruce Fields return; 39560997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 39570997b173SJ. Bruce Fields __set_bit(access, &lock_stp->st_access_bmap); 39580997b173SJ. Bruce Fields } 39590997b173SJ. Bruce Fields 39601da177e4SLinus Torvalds /* 39611da177e4SLinus Torvalds * LOCK operation 39621da177e4SLinus Torvalds */ 3963b37ad28bSAl Viro __be32 3964ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3965a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 39661da177e4SLinus Torvalds { 39673e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 3968b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 39691da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 39707d947842SJ. Bruce Fields struct nfs4_file *fp; 39717d947842SJ. Bruce Fields struct file *filp = NULL; 39721da177e4SLinus Torvalds struct file_lock file_lock; 39738dc7c311SAndy Adamson struct file_lock conflock; 3974b37ad28bSAl Viro __be32 status = 0; 39751da177e4SLinus Torvalds unsigned int strhashval; 3976b34f27aaSJ. Bruce Fields int lkflg; 3977b8dd7b9aSAl Viro int err; 39781da177e4SLinus Torvalds 39791da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 39801da177e4SLinus Torvalds (long long) lock->lk_offset, 39811da177e4SLinus Torvalds (long long) lock->lk_length); 39821da177e4SLinus Torvalds 39831da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 39841da177e4SLinus Torvalds return nfserr_inval; 39851da177e4SLinus Torvalds 3986ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 39878837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3988a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3989a6f6ef2fSAndy Adamson return status; 3990a6f6ef2fSAndy Adamson } 3991a6f6ef2fSAndy Adamson 39921da177e4SLinus Torvalds nfs4_lock_state(); 39931da177e4SLinus Torvalds 39941da177e4SLinus Torvalds if (lock->lk_is_new) { 39951da177e4SLinus Torvalds /* 39961da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3997893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3998893f8770SNeilBrown * lock stateid. 39991da177e4SLinus Torvalds */ 40001da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 40011da177e4SLinus Torvalds 40021da177e4SLinus Torvalds status = nfserr_stale_clientid; 400360adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && 400460adfc50SAndy Adamson STALE_CLIENTID(&lock->lk_new_clientid)) 40051da177e4SLinus Torvalds goto out; 40061da177e4SLinus Torvalds 40071da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4008dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 40091da177e4SLinus Torvalds lock->lk_new_open_seqid, 40101da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4011f3362737SJ. Bruce Fields OPEN_STATE, 4012b34f27aaSJ. Bruce Fields &lock->lk_replay_owner, &open_stp); 401337515177SNeilBrown if (status) 40141da177e4SLinus Torvalds goto out; 4015b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 40163a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 4017b34f27aaSJ. Bruce Fields if (!nfsd4_has_session(cstate) && 4018b34f27aaSJ. Bruce Fields !same_clid(&open_sop->so_client->cl_clientid, 4019b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4020b34f27aaSJ. Bruce Fields goto out; 40211da177e4SLinus Torvalds /* create lockowner and lock stateid */ 40221da177e4SLinus Torvalds fp = open_stp->st_file; 40231da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 40241da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 40251da177e4SLinus Torvalds &lock->v.new.owner); 40263e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 40273e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 40283e9e3dbeSNeilBrown * create new stateids)? */ 40293e772463SJ. Bruce Fields status = nfserr_jukebox; 4030b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 4031b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 4032b59e3c0eSNeil Brown if (lock_sop == NULL) 40331da177e4SLinus Torvalds goto out; 4034b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 40358a280510SJ. Bruce Fields if (lock_stp == NULL) 40361da177e4SLinus Torvalds goto out; 40371da177e4SLinus Torvalds } else { 40381da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 4039dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 40401da177e4SLinus Torvalds lock->lk_old_lock_seqid, 40411da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 4042f3362737SJ. Bruce Fields LOCK_STATE, 4043b34f27aaSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp); 40441da177e4SLinus Torvalds if (status) 40451da177e4SLinus Torvalds goto out; 40463a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 40477d947842SJ. Bruce Fields fp = lock_stp->st_file; 40481da177e4SLinus Torvalds } 40493a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 40501da177e4SLinus Torvalds 4051b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4052b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4053b34f27aaSJ. Bruce Fields if (status) 4054b34f27aaSJ. Bruce Fields goto out; 4055b34f27aaSJ. Bruce Fields 40560dd395dcSNeilBrown status = nfserr_grace; 4057af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 40580dd395dcSNeilBrown goto out; 40590dd395dcSNeilBrown status = nfserr_no_grace; 4060af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 40610dd395dcSNeilBrown goto out; 40620dd395dcSNeilBrown 40631da177e4SLinus Torvalds locks_init_lock(&file_lock); 40641da177e4SLinus Torvalds switch (lock->lk_type) { 40651da177e4SLinus Torvalds case NFS4_READ_LT: 40661da177e4SLinus Torvalds case NFS4_READW_LT: 4067f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 40680997b173SJ. Bruce Fields if (filp) 40690997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 40701da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 40711da177e4SLinus Torvalds break; 40721da177e4SLinus Torvalds case NFS4_WRITE_LT: 40731da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4074f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 40750997b173SJ. Bruce Fields if (filp) 40760997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 40771da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 40781da177e4SLinus Torvalds break; 40791da177e4SLinus Torvalds default: 40801da177e4SLinus Torvalds status = nfserr_inval; 40811da177e4SLinus Torvalds goto out; 40821da177e4SLinus Torvalds } 4083f9d7562fSJ. Bruce Fields if (!filp) { 4084f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4085f9d7562fSJ. Bruce Fields goto out; 4086f9d7562fSJ. Bruce Fields } 4087b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 40881da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 40891da177e4SLinus Torvalds file_lock.fl_file = filp; 40901da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4091d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 40921da177e4SLinus Torvalds 40931da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 409487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 40951da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 40961da177e4SLinus Torvalds 40971da177e4SLinus Torvalds /* 40981da177e4SLinus Torvalds * Try to lock the file in the VFS. 40991da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 41001da177e4SLinus Torvalds */ 41011da177e4SLinus Torvalds 4102529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4103b8dd7b9aSAl Viro switch (-err) { 41041da177e4SLinus Torvalds case 0: /* success! */ 41051da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 41061da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 41071da177e4SLinus Torvalds sizeof(stateid_t)); 4108b8dd7b9aSAl Viro status = 0; 4109eb76b3fdSAndy Adamson break; 4110eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4111eb76b3fdSAndy Adamson status = nfserr_denied; 4112eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4113eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4114eb76b3fdSAndy Adamson break; 41151da177e4SLinus Torvalds case (EDEADLK): 41161da177e4SLinus Torvalds status = nfserr_deadlock; 4117eb76b3fdSAndy Adamson break; 41181da177e4SLinus Torvalds default: 4119fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 41203e772463SJ. Bruce Fields status = nfserrno(err); 4121eb76b3fdSAndy Adamson break; 41221da177e4SLinus Torvalds } 41231da177e4SLinus Torvalds out: 41248a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 4125f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 41263a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 41273a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 4128a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 4129f2327d9aSNeil Brown } 41301da177e4SLinus Torvalds nfs4_unlock_state(); 41311da177e4SLinus Torvalds return status; 41321da177e4SLinus Torvalds } 41331da177e4SLinus Torvalds 41341da177e4SLinus Torvalds /* 413555ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 413655ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 413755ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 413855ef1274SJ. Bruce Fields * inode operation.) 413955ef1274SJ. Bruce Fields */ 414055ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 414155ef1274SJ. Bruce Fields { 414255ef1274SJ. Bruce Fields struct file *file; 414355ef1274SJ. Bruce Fields int err; 414455ef1274SJ. Bruce Fields 414555ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 414655ef1274SJ. Bruce Fields if (err) 414755ef1274SJ. Bruce Fields return err; 414855ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 414955ef1274SJ. Bruce Fields nfsd_close(file); 415055ef1274SJ. Bruce Fields return err; 415155ef1274SJ. Bruce Fields } 415255ef1274SJ. Bruce Fields 415355ef1274SJ. Bruce Fields /* 41541da177e4SLinus Torvalds * LOCKT operation 41551da177e4SLinus Torvalds */ 4156b37ad28bSAl Viro __be32 4157ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4158ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 41591da177e4SLinus Torvalds { 41601da177e4SLinus Torvalds struct inode *inode; 41611da177e4SLinus Torvalds struct file_lock file_lock; 4162fd85b817SMarc Eshel int error; 4163b37ad28bSAl Viro __be32 status; 41641da177e4SLinus Torvalds 4165af558e33SJ. Bruce Fields if (locks_in_grace()) 41661da177e4SLinus Torvalds return nfserr_grace; 41671da177e4SLinus Torvalds 41681da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 41691da177e4SLinus Torvalds return nfserr_inval; 41701da177e4SLinus Torvalds 41711da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 41721da177e4SLinus Torvalds nfs4_lock_state(); 41731da177e4SLinus Torvalds 41741da177e4SLinus Torvalds status = nfserr_stale_clientid; 417560adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 41761da177e4SLinus Torvalds goto out; 41771da177e4SLinus Torvalds 417875c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 41791da177e4SLinus Torvalds goto out; 41801da177e4SLinus Torvalds 4181ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 41821da177e4SLinus Torvalds locks_init_lock(&file_lock); 41831da177e4SLinus Torvalds switch (lockt->lt_type) { 41841da177e4SLinus Torvalds case NFS4_READ_LT: 41851da177e4SLinus Torvalds case NFS4_READW_LT: 41861da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41871da177e4SLinus Torvalds break; 41881da177e4SLinus Torvalds case NFS4_WRITE_LT: 41891da177e4SLinus Torvalds case NFS4_WRITEW_LT: 41901da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41911da177e4SLinus Torvalds break; 41921da177e4SLinus Torvalds default: 41932fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 41941da177e4SLinus Torvalds status = nfserr_inval; 41951da177e4SLinus Torvalds goto out; 41961da177e4SLinus Torvalds } 41971da177e4SLinus Torvalds 41981da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 41991da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 42001da177e4SLinus Torvalds if (lockt->lt_stateowner) 42011da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 42021da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42031da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 42041da177e4SLinus Torvalds 42051da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 420687df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 42071da177e4SLinus Torvalds 42081da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42091da177e4SLinus Torvalds 42101da177e4SLinus Torvalds status = nfs_ok; 421155ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4212fd85b817SMarc Eshel if (error) { 4213fd85b817SMarc Eshel status = nfserrno(error); 4214fd85b817SMarc Eshel goto out; 4215fd85b817SMarc Eshel } 42169d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 42171da177e4SLinus Torvalds status = nfserr_denied; 42189d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 42191da177e4SLinus Torvalds } 42201da177e4SLinus Torvalds out: 42211da177e4SLinus Torvalds nfs4_unlock_state(); 42221da177e4SLinus Torvalds return status; 42231da177e4SLinus Torvalds } 42241da177e4SLinus Torvalds 4225b37ad28bSAl Viro __be32 4226ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4227a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 42281da177e4SLinus Torvalds { 42291da177e4SLinus Torvalds struct nfs4_stateid *stp; 42301da177e4SLinus Torvalds struct file *filp = NULL; 42311da177e4SLinus Torvalds struct file_lock file_lock; 4232b37ad28bSAl Viro __be32 status; 4233b8dd7b9aSAl Viro int err; 42341da177e4SLinus Torvalds 42351da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 42361da177e4SLinus Torvalds (long long) locku->lu_offset, 42371da177e4SLinus Torvalds (long long) locku->lu_length); 42381da177e4SLinus Torvalds 42391da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 42401da177e4SLinus Torvalds return nfserr_inval; 42411da177e4SLinus Torvalds 42421da177e4SLinus Torvalds nfs4_lock_state(); 42431da177e4SLinus Torvalds 4244dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 42451da177e4SLinus Torvalds locku->lu_seqid, 42461da177e4SLinus Torvalds &locku->lu_stateid, 4247f3362737SJ. Bruce Fields LOCK_STATE, 4248b34f27aaSJ. Bruce Fields &locku->lu_stateowner, &stp))) 42491da177e4SLinus Torvalds goto out; 42501da177e4SLinus Torvalds 4251f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4252f9d7562fSJ. Bruce Fields if (!filp) { 4253f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4254f9d7562fSJ. Bruce Fields goto out; 4255f9d7562fSJ. Bruce Fields } 42561da177e4SLinus Torvalds BUG_ON(!filp); 42571da177e4SLinus Torvalds locks_init_lock(&file_lock); 42581da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 42591da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 42601da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42611da177e4SLinus Torvalds file_lock.fl_file = filp; 42621da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4263d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 42641da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 42651da177e4SLinus Torvalds 426687df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 42671da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42681da177e4SLinus Torvalds 42691da177e4SLinus Torvalds /* 42701da177e4SLinus Torvalds * Try to unlock the file in the VFS. 42711da177e4SLinus Torvalds */ 4272fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4273b8dd7b9aSAl Viro if (err) { 4274fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 42751da177e4SLinus Torvalds goto out_nfserr; 42761da177e4SLinus Torvalds } 42771da177e4SLinus Torvalds /* 42781da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 42791da177e4SLinus Torvalds */ 42801da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 42811da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 42821da177e4SLinus Torvalds 42831da177e4SLinus Torvalds out: 4284f2327d9aSNeil Brown if (locku->lu_stateowner) { 42851da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 4286a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 4287f2327d9aSNeil Brown } 42881da177e4SLinus Torvalds nfs4_unlock_state(); 42891da177e4SLinus Torvalds return status; 42901da177e4SLinus Torvalds 42911da177e4SLinus Torvalds out_nfserr: 4292b8dd7b9aSAl Viro status = nfserrno(err); 42931da177e4SLinus Torvalds goto out; 42941da177e4SLinus Torvalds } 42951da177e4SLinus Torvalds 42961da177e4SLinus Torvalds /* 42971da177e4SLinus Torvalds * returns 42981da177e4SLinus Torvalds * 1: locks held by lockowner 42991da177e4SLinus Torvalds * 0: no locks held by lockowner 43001da177e4SLinus Torvalds */ 43011da177e4SLinus Torvalds static int 4302f9d7562fSJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) 43031da177e4SLinus Torvalds { 43041da177e4SLinus Torvalds struct file_lock **flpp; 4305f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 43061da177e4SLinus Torvalds int status = 0; 43071da177e4SLinus Torvalds 4308b89f4321SArnd Bergmann lock_flocks(); 43091da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4310796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 43111da177e4SLinus Torvalds status = 1; 43121da177e4SLinus Torvalds goto out; 43131da177e4SLinus Torvalds } 4314796dadfdSJ. Bruce Fields } 43151da177e4SLinus Torvalds out: 4316b89f4321SArnd Bergmann unlock_flocks(); 43171da177e4SLinus Torvalds return status; 43181da177e4SLinus Torvalds } 43191da177e4SLinus Torvalds 4320b37ad28bSAl Viro __be32 4321b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4322b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4323b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 43241da177e4SLinus Torvalds { 43251da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 43263e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 43273e9e3dbeSNeilBrown struct nfs4_stateid *stp; 43281da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 43293e9e3dbeSNeilBrown struct list_head matches; 43303e9e3dbeSNeilBrown int i; 4331b37ad28bSAl Viro __be32 status; 43321da177e4SLinus Torvalds 43331da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 43341da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 43351da177e4SLinus Torvalds 43361da177e4SLinus Torvalds /* XXX check for lease expiration */ 43371da177e4SLinus Torvalds 43381da177e4SLinus Torvalds status = nfserr_stale_clientid; 4339849823c5SNeil Brown if (STALE_CLIENTID(clid)) 43401da177e4SLinus Torvalds return status; 43411da177e4SLinus Torvalds 43421da177e4SLinus Torvalds nfs4_lock_state(); 43431da177e4SLinus Torvalds 43441da177e4SLinus Torvalds status = nfserr_locks_held; 43453e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 43463e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 43473e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 43483e9e3dbeSNeilBrown * data structures. */ 43493e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 43503e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 43513e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 4352599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 43533e9e3dbeSNeilBrown continue; 43543e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4355ea1da636SNeilBrown st_perstateowner) { 4356f9d7562fSJ. Bruce Fields if (check_for_locks(stp->st_file, sop)) 43571da177e4SLinus Torvalds goto out; 43583e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 43593e9e3dbeSNeilBrown * so it's OK to fool with here. */ 43603e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 43611da177e4SLinus Torvalds } 43623e9e3dbeSNeilBrown } 43633e9e3dbeSNeilBrown } 43643e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 43653e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 43663e9e3dbeSNeilBrown * have been checked. */ 43671da177e4SLinus Torvalds status = nfs_ok; 43680fa822e4SNeilBrown while (!list_empty(&matches)) { 43690fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 43700fa822e4SNeilBrown so_perclient); 43710fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 43720fa822e4SNeilBrown * for openowners. */ 43730fa822e4SNeilBrown list_del(&sop->so_perclient); 4374f044ff83SJ. Bruce Fields release_lockowner(sop); 43751da177e4SLinus Torvalds } 43761da177e4SLinus Torvalds out: 43771da177e4SLinus Torvalds nfs4_unlock_state(); 43781da177e4SLinus Torvalds return status; 43791da177e4SLinus Torvalds } 43801da177e4SLinus Torvalds 43811da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4382a55370a3SNeilBrown alloc_reclaim(void) 43831da177e4SLinus Torvalds { 4384a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 43851da177e4SLinus Torvalds } 43861da177e4SLinus Torvalds 4387c7b9a459SNeilBrown int 4388a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4389c7b9a459SNeilBrown { 4390c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4391c7b9a459SNeilBrown struct nfs4_client *clp; 4392c7b9a459SNeilBrown 4393e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4394c7b9a459SNeilBrown return clp ? 1 : 0; 4395c7b9a459SNeilBrown } 4396c7b9a459SNeilBrown 43971da177e4SLinus Torvalds /* 43981da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 43991da177e4SLinus Torvalds */ 4400190e4fbfSNeilBrown int 4401190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 44021da177e4SLinus Torvalds { 44031da177e4SLinus Torvalds unsigned int strhashval; 44041da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44051da177e4SLinus Torvalds 4406a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4407a55370a3SNeilBrown crp = alloc_reclaim(); 44081da177e4SLinus Torvalds if (!crp) 44091da177e4SLinus Torvalds return 0; 4410a55370a3SNeilBrown strhashval = clientstr_hashval(name); 44111da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 44121da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4413a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 44141da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 44151da177e4SLinus Torvalds return 1; 44161da177e4SLinus Torvalds } 44171da177e4SLinus Torvalds 44181da177e4SLinus Torvalds static void 44191da177e4SLinus Torvalds nfs4_release_reclaim(void) 44201da177e4SLinus Torvalds { 44211da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44221da177e4SLinus Torvalds int i; 44231da177e4SLinus Torvalds 44241da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44251da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 44261da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 44271da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 44281da177e4SLinus Torvalds list_del(&crp->cr_strhash); 44291da177e4SLinus Torvalds kfree(crp); 44301da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 44311da177e4SLinus Torvalds } 44321da177e4SLinus Torvalds } 44331da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 44341da177e4SLinus Torvalds } 44351da177e4SLinus Torvalds 44361da177e4SLinus Torvalds /* 44371da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 4438fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 44391da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 44401da177e4SLinus Torvalds { 44411da177e4SLinus Torvalds unsigned int strhashval; 44421da177e4SLinus Torvalds struct nfs4_client *clp; 44431da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44441da177e4SLinus Torvalds 44451da177e4SLinus Torvalds 44461da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 44471da177e4SLinus Torvalds clp = find_confirmed_client(clid); 44481da177e4SLinus Torvalds if (clp == NULL) 44491da177e4SLinus Torvalds return NULL; 44501da177e4SLinus Torvalds 4451a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4452a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4453a55370a3SNeilBrown clp->cl_recdir); 44541da177e4SLinus Torvalds 44551da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4456a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 44571da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4458a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 44591da177e4SLinus Torvalds return crp; 44601da177e4SLinus Torvalds } 44611da177e4SLinus Torvalds } 44621da177e4SLinus Torvalds return NULL; 44631da177e4SLinus Torvalds } 44641da177e4SLinus Torvalds 44651da177e4SLinus Torvalds /* 44661da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 44671da177e4SLinus Torvalds */ 4468b37ad28bSAl Viro __be32 44691da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 44701da177e4SLinus Torvalds { 4471dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 44721da177e4SLinus Torvalds } 44731da177e4SLinus Torvalds 4474ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 44751da177e4SLinus Torvalds 4476e8ff2a84SJ. Bruce Fields int 4477ac4d8ff2SNeilBrown nfs4_state_init(void) 44781da177e4SLinus Torvalds { 4479e8ff2a84SJ. Bruce Fields int i, status; 44801da177e4SLinus Torvalds 4481e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 4482e8ff2a84SJ. Bruce Fields if (status) 4483e8ff2a84SJ. Bruce Fields return status; 44841da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44851da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 44861da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 44871da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 44881da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 448902cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 44901da177e4SLinus Torvalds } 44915282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 44925282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 44931da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 44941da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 44951da177e4SLinus Torvalds } 4496506f275fSJ. Bruce Fields for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { 4497506f275fSJ. Bruce Fields INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); 4498506f275fSJ. Bruce Fields INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); 44991da177e4SLinus Torvalds } 45001da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 45011da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 45021da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 45031da177e4SLinus Torvalds } 45041da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 45051da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 45061da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 45071da177e4SLinus Torvalds } 45081da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 45091da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 45101da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 45111da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4512ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4513e8ff2a84SJ. Bruce Fields return 0; 4514ac4d8ff2SNeilBrown } 4515ac4d8ff2SNeilBrown 4516190e4fbfSNeilBrown static void 4517190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4518190e4fbfSNeilBrown { 4519190e4fbfSNeilBrown int status; 4520190e4fbfSNeilBrown 45210964a3d3SNeilBrown nfs4_lock_state(); 452248483bf2SJ. Bruce Fields nfsd4_init_recdir(); 4523190e4fbfSNeilBrown status = nfsd4_recdir_load(); 45240964a3d3SNeilBrown nfs4_unlock_state(); 4525190e4fbfSNeilBrown if (status) 4526190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4527190e4fbfSNeilBrown } 4528190e4fbfSNeilBrown 4529c2f1a551SMeelap Shah /* 4530c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4531c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4532c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4533c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4534c2f1a551SMeelap Shah * 4535c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4536c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4537c2f1a551SMeelap Shah */ 4538c2f1a551SMeelap Shah static void 4539c2f1a551SMeelap Shah set_max_delegations(void) 4540c2f1a551SMeelap Shah { 4541c2f1a551SMeelap Shah /* 4542c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4543c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4544c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4545c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4546c2f1a551SMeelap Shah */ 4547c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4548c2f1a551SMeelap Shah } 4549c2f1a551SMeelap Shah 4550ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4551ac4d8ff2SNeilBrown 455229ab23ccSJ. Bruce Fields static int 4553ac4d8ff2SNeilBrown __nfs4_state_start(void) 4554ac4d8ff2SNeilBrown { 4555b5a1a81eSJ. Bruce Fields int ret; 4556b5a1a81eSJ. Bruce Fields 45571da177e4SLinus Torvalds boot_time = get_seconds(); 4558af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 45599a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4560e46b498cSJ. Bruce Fields nfsd4_grace); 4561b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4562b5a1a81eSJ. Bruce Fields if (ret) 4563b5a1a81eSJ. Bruce Fields return -ENOMEM; 456458da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 456529ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 456629ab23ccSJ. Bruce Fields return -ENOMEM; 4567b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4568b5a1a81eSJ. Bruce Fields if (ret) 4569b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4570e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4571c2f1a551SMeelap Shah set_max_delegations(); 4572b5a1a81eSJ. Bruce Fields return 0; 4573b5a1a81eSJ. Bruce Fields out_free_laundry: 4574b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4575b5a1a81eSJ. Bruce Fields return ret; 45761da177e4SLinus Torvalds } 45771da177e4SLinus Torvalds 457829ab23ccSJ. Bruce Fields int 457976a3550eSNeilBrown nfs4_state_start(void) 45801da177e4SLinus Torvalds { 4581190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 45824ad9a344SJeff Layton return __nfs4_state_start(); 45831da177e4SLinus Torvalds } 45841da177e4SLinus Torvalds 45851da177e4SLinus Torvalds static void 45861da177e4SLinus Torvalds __nfs4_state_shutdown(void) 45871da177e4SLinus Torvalds { 45881da177e4SLinus Torvalds int i; 45891da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 45901da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 45911da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 45921da177e4SLinus Torvalds 45931da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 45941da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 45951da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 45961da177e4SLinus Torvalds expire_client(clp); 45971da177e4SLinus Torvalds } 45981da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 45991da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 46001da177e4SLinus Torvalds expire_client(clp); 46011da177e4SLinus Torvalds } 46021da177e4SLinus Torvalds } 46031da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 46041da177e4SLinus Torvalds spin_lock(&recall_lock); 46051da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 46061da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 46071da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 46081da177e4SLinus Torvalds } 46091da177e4SLinus Torvalds spin_unlock(&recall_lock); 46101da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 46111da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 46121da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 46131da177e4SLinus Torvalds unhash_delegation(dp); 46141da177e4SLinus Torvalds } 46151da177e4SLinus Torvalds 4616190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 46171da177e4SLinus Torvalds } 46181da177e4SLinus Torvalds 46191da177e4SLinus Torvalds void 46201da177e4SLinus Torvalds nfs4_state_shutdown(void) 46211da177e4SLinus Torvalds { 4622afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 46235e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 46242c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 46251da177e4SLinus Torvalds nfs4_lock_state(); 46261da177e4SLinus Torvalds nfs4_release_reclaim(); 46271da177e4SLinus Torvalds __nfs4_state_shutdown(); 46281da177e4SLinus Torvalds nfs4_unlock_state(); 4629c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 46301da177e4SLinus Torvalds } 4631