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> 361da177e4SLinus Torvalds #include <linux/smp_lock.h> 370964a3d3SNeilBrown #include <linux/namei.h> 38c2f1a551SMeelap Shah #include <linux/swap.h> 3968e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 40363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 419a74af21SBoaz Harrosh #include "xdr4.h" 420a3adadeSJ. Bruce Fields #include "vfs.h" 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds /* Globals */ 471da177e4SLinus Torvalds static time_t lease_time = 90; /* default lease time */ 48d99a05adSNeilBrown static time_t user_lease_time = 90; 49fd39ca9aSNeilBrown static time_t boot_time; 501da177e4SLinus Torvalds static u32 current_ownerid = 1; 511da177e4SLinus Torvalds static u32 current_fileid = 1; 521da177e4SLinus Torvalds static u32 current_delegid = 1; 531da177e4SLinus Torvalds static u32 nfs4_init; 54fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 55fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 56ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 57fd39ca9aSNeilBrown 58fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 59fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds /* forward declarations */ 62fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 631da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 640964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 650964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 661da177e4SLinus Torvalds 678b671b80SJ. Bruce Fields /* Locking: */ 688b671b80SJ. Bruce Fields 698b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 70353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 711da177e4SLinus Torvalds 728b671b80SJ. Bruce Fields /* 738b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 748b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 758b671b80SJ. Bruce Fields * eventually cover more: 768b671b80SJ. Bruce Fields */ 778b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 788b671b80SJ. Bruce Fields 79e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 80e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 81e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 82e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 83e60d4398SNeilBrown 841da177e4SLinus Torvalds void 851da177e4SLinus Torvalds nfs4_lock_state(void) 861da177e4SLinus Torvalds { 87353ab6e9SIngo Molnar mutex_lock(&client_mutex); 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds void 911da177e4SLinus Torvalds nfs4_unlock_state(void) 921da177e4SLinus Torvalds { 93353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 941da177e4SLinus Torvalds } 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds static inline u32 971da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 981da177e4SLinus Torvalds { 991da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds u32 x = 0; 1021da177e4SLinus Torvalds while (nbytes--) { 1031da177e4SLinus Torvalds x *= 37; 1041da177e4SLinus Torvalds x += *cptr++; 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds return x; 1071da177e4SLinus Torvalds } 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds static struct list_head del_recall_lru; 1101da177e4SLinus Torvalds 11113cd2184SNeilBrown static inline void 11213cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 11313cd2184SNeilBrown { 1148b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1158b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1168b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1178b671b80SJ. Bruce Fields iput(fi->fi_inode); 1188b671b80SJ. Bruce Fields kmem_cache_free(file_slab, fi); 1198b671b80SJ. Bruce Fields } 12013cd2184SNeilBrown } 12113cd2184SNeilBrown 12213cd2184SNeilBrown static inline void 12313cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 12413cd2184SNeilBrown { 1258b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 12613cd2184SNeilBrown } 12713cd2184SNeilBrown 128ef0f3390SNeilBrown static int num_delegations; 129c2f1a551SMeelap Shah unsigned int max_delegations; 130ef0f3390SNeilBrown 131ef0f3390SNeilBrown /* 132ef0f3390SNeilBrown * Open owner state (share locks) 133ef0f3390SNeilBrown */ 134ef0f3390SNeilBrown 135ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 136ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 137ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 138ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 139ef0f3390SNeilBrown 140ef0f3390SNeilBrown #define ownerid_hashval(id) \ 141ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 142ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 143ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 144ef0f3390SNeilBrown 145ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 146ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 147ef0f3390SNeilBrown 148ef0f3390SNeilBrown /* hash table for nfs4_file */ 149ef0f3390SNeilBrown #define FILE_HASH_BITS 8 150ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 151ef0f3390SNeilBrown #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 152ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 153ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 154ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 155ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 156ef0f3390SNeilBrown 157ef0f3390SNeilBrown #define file_hashval(x) \ 158ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 159ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 160ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 161ef0f3390SNeilBrown 162ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 163ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 164ef0f3390SNeilBrown 1651da177e4SLinus Torvalds static struct nfs4_delegation * 1661da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1671da177e4SLinus Torvalds { 1681da177e4SLinus Torvalds struct nfs4_delegation *dp; 1691da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 170c237dc03SJ. Bruce Fields struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 17347f9940cSMeelap Shah if (fp->fi_had_conflict) 17447f9940cSMeelap Shah return NULL; 175c2f1a551SMeelap Shah if (num_delegations > max_delegations) 176ef0f3390SNeilBrown return NULL; 1775b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 1785b2d21c1SNeilBrown if (dp == NULL) 1791da177e4SLinus Torvalds return dp; 180ef0f3390SNeilBrown num_delegations++; 181ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 182ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 1831da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 1841da177e4SLinus Torvalds dp->dl_client = clp; 18513cd2184SNeilBrown get_nfs4_file(fp); 1861da177e4SLinus Torvalds dp->dl_file = fp; 1871da177e4SLinus Torvalds dp->dl_flock = NULL; 1881da177e4SLinus Torvalds get_file(stp->st_vfs_file); 1891da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 1901da177e4SLinus Torvalds dp->dl_type = type; 191b53d40c5SJ. Bruce Fields dp->dl_ident = cb->cb_ident; 19278155ed7SBian Naimeng dp->dl_stateid.si_boot = get_seconds(); 1931da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 1941da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 1951da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 1966c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 1971da177e4SLinus Torvalds dp->dl_time = 0; 1981da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 199ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 200ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 2011da177e4SLinus Torvalds return dp; 2021da177e4SLinus Torvalds } 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds void 2051da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2061da177e4SLinus Torvalds { 2071da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2081da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 20913cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2105b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 211ef0f3390SNeilBrown num_delegations--; 2121da177e4SLinus Torvalds } 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2161da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2171da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2181da177e4SLinus Torvalds * fl_release_callback. 2191da177e4SLinus Torvalds */ 2201da177e4SLinus Torvalds static void 2211da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2221da177e4SLinus Torvalds { 2231da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2261da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2271da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2281da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 229c907132dSNeilBrown if (dp->dl_flock) 230a9933ceaSJ. Bruce Fields vfs_setlease(filp, F_UNLCK, &dp->dl_flock); 2311da177e4SLinus Torvalds nfsd_close(filp); 2321da177e4SLinus Torvalds } 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds /* Called under the state lock. */ 2351da177e4SLinus Torvalds static void 2361da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2371da177e4SLinus Torvalds { 238ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 239ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2401da177e4SLinus Torvalds spin_lock(&recall_lock); 2411da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2421da177e4SLinus Torvalds spin_unlock(&recall_lock); 2431da177e4SLinus Torvalds nfs4_close_delegation(dp); 2441da177e4SLinus Torvalds nfs4_put_delegation(dp); 2451da177e4SLinus Torvalds } 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds /* 2481da177e4SLinus Torvalds * SETCLIENTID state 2491da177e4SLinus Torvalds */ 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2521da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2531da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2541da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds #define clientid_hashval(id) \ 2571da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 258a55370a3SNeilBrown #define clientstr_hashval(name) \ 259a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2601da177e4SLinus Torvalds /* 2611da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2621da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2631da177e4SLinus Torvalds * 2641da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2651da177e4SLinus Torvalds * setclientid_confirmed info. 2661da177e4SLinus Torvalds * 2671da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2681da177e4SLinus Torvalds * setclientid info. 2691da177e4SLinus Torvalds * 2701da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 2711da177e4SLinus Torvalds * for lease renewal. 2721da177e4SLinus Torvalds * 2731da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 2741da177e4SLinus Torvalds * for last close replay. 2751da177e4SLinus Torvalds */ 2761da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 2771da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 2781da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 2791da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 2801da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 2811da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 2821da177e4SLinus Torvalds static struct list_head client_lru; 2831da177e4SLinus Torvalds static struct list_head close_lru; 2841da177e4SLinus Torvalds 2852283963fSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 2862283963fSJ. Bruce Fields { 2872283963fSJ. Bruce Fields list_del(&stp->st_hash); 2882283963fSJ. Bruce Fields list_del(&stp->st_perfile); 2892283963fSJ. Bruce Fields list_del(&stp->st_perstateowner); 2902283963fSJ. Bruce Fields } 2912283963fSJ. Bruce Fields 2922283963fSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 2932283963fSJ. Bruce Fields { 2942283963fSJ. Bruce Fields put_nfs4_file(stp->st_file); 2952283963fSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 2962283963fSJ. Bruce Fields } 2972283963fSJ. Bruce Fields 2982283963fSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 2992283963fSJ. Bruce Fields { 3002283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3012283963fSJ. Bruce Fields locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); 3022283963fSJ. Bruce Fields free_generic_stateid(stp); 3032283963fSJ. Bruce Fields } 3042283963fSJ. Bruce Fields 305f044ff83SJ. Bruce Fields static void unhash_lockowner(struct nfs4_stateowner *sop) 306f044ff83SJ. Bruce Fields { 307f044ff83SJ. Bruce Fields struct nfs4_stateid *stp; 308f044ff83SJ. Bruce Fields 309f044ff83SJ. Bruce Fields list_del(&sop->so_idhash); 310f044ff83SJ. Bruce Fields list_del(&sop->so_strhash); 311f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); 312f044ff83SJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 313f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 314f044ff83SJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 315f044ff83SJ. Bruce Fields release_lock_stateid(stp); 316f044ff83SJ. Bruce Fields } 317f044ff83SJ. Bruce Fields } 318f044ff83SJ. Bruce Fields 319f044ff83SJ. Bruce Fields static void release_lockowner(struct nfs4_stateowner *sop) 320f044ff83SJ. Bruce Fields { 321f044ff83SJ. Bruce Fields unhash_lockowner(sop); 322f044ff83SJ. Bruce Fields nfs4_put_stateowner(sop); 323f044ff83SJ. Bruce Fields } 324f044ff83SJ. Bruce Fields 325f1d110caSJ. Bruce Fields static void 326f1d110caSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 327f1d110caSJ. Bruce Fields { 328f1d110caSJ. Bruce Fields struct nfs4_stateowner *lock_sop; 329f1d110caSJ. Bruce Fields 330f1d110caSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 331f1d110caSJ. Bruce Fields lock_sop = list_entry(open_stp->st_lockowners.next, 332f1d110caSJ. Bruce Fields struct nfs4_stateowner, so_perstateid); 333f1d110caSJ. Bruce Fields /* list_del(&open_stp->st_lockowners); */ 334f1d110caSJ. Bruce Fields BUG_ON(lock_sop->so_is_open_owner); 335f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 336f1d110caSJ. Bruce Fields } 337f1d110caSJ. Bruce Fields } 338f1d110caSJ. Bruce Fields 3392283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 3402283963fSJ. Bruce Fields { 3412283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3422283963fSJ. Bruce Fields release_stateid_lockowners(stp); 3432283963fSJ. Bruce Fields nfsd_close(stp->st_vfs_file); 3442283963fSJ. Bruce Fields free_generic_stateid(stp); 3452283963fSJ. Bruce Fields } 3462283963fSJ. Bruce Fields 347f044ff83SJ. Bruce Fields static void unhash_openowner(struct nfs4_stateowner *sop) 348f1d110caSJ. Bruce Fields { 349f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 350f1d110caSJ. Bruce Fields 351f1d110caSJ. Bruce Fields list_del(&sop->so_idhash); 352f1d110caSJ. Bruce Fields list_del(&sop->so_strhash); 353f1d110caSJ. Bruce Fields list_del(&sop->so_perclient); 354f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); /* XXX: necessary? */ 355f1d110caSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 356f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 357f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 358f1d110caSJ. Bruce Fields release_open_stateid(stp); 359f1d110caSJ. Bruce Fields } 360f1d110caSJ. Bruce Fields } 361f1d110caSJ. Bruce Fields 362f044ff83SJ. Bruce Fields static void release_openowner(struct nfs4_stateowner *sop) 363f1d110caSJ. Bruce Fields { 364f044ff83SJ. Bruce Fields unhash_openowner(sop); 365f1d110caSJ. Bruce Fields list_del(&sop->so_close_lru); 366f1d110caSJ. Bruce Fields nfs4_put_stateowner(sop); 367f1d110caSJ. Bruce Fields } 368f1d110caSJ. Bruce Fields 3695282fd72SMarc Eshel static DEFINE_SPINLOCK(sessionid_lock); 3705282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 3715282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 3725282fd72SMarc Eshel 3735282fd72SMarc Eshel static inline int 3745282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 3755282fd72SMarc Eshel { 3765282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 3775282fd72SMarc Eshel 3785282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 3795282fd72SMarc Eshel } 3805282fd72SMarc Eshel 3815282fd72SMarc Eshel static inline void 3825282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 3835282fd72SMarc Eshel { 3845282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 3855282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 3865282fd72SMarc Eshel } 3875282fd72SMarc Eshel 388ec6b5d7bSAndy Adamson static void 389ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 390ec6b5d7bSAndy Adamson { 391ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 392ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 393ec6b5d7bSAndy Adamson 394ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 395ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 396ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 397ec6b5d7bSAndy Adamson sid->reserved = 0; 398ec6b5d7bSAndy Adamson } 399ec6b5d7bSAndy Adamson 400ec6b5d7bSAndy Adamson /* 401a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 402a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 403a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 404a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 405a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 406a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 407a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 408a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 409a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 410a649637cSAndy Adamson * for the SEQUENCE op response: 411ec6b5d7bSAndy Adamson */ 412a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 413a649637cSAndy Adamson 414a649637cSAndy Adamson /* 415a649637cSAndy Adamson * Give the client the number of ca_maxresponsesize_cached slots it 416a649637cSAndy Adamson * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, 417a649637cSAndy Adamson * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more 418a649637cSAndy Adamson * than NFSD_MAX_SLOTS_PER_SESSION. 419a649637cSAndy Adamson * 420a649637cSAndy Adamson * If we run out of reserved DRC memory we should (up to a point) 421a649637cSAndy Adamson * re-negotiate active sessions and reduce their slot usage to make 422a649637cSAndy Adamson * rooom for new connections. For now we just fail the create session. 423a649637cSAndy Adamson */ 424a649637cSAndy Adamson static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) 425ec6b5d7bSAndy Adamson { 426a649637cSAndy Adamson int mem, size = fchan->maxresp_cached; 427ec6b5d7bSAndy Adamson 4285d77ddfbSAndy Adamson if (fchan->maxreqs < 1) 4295d77ddfbSAndy Adamson return nfserr_inval; 4305d77ddfbSAndy Adamson 431a649637cSAndy Adamson if (size < NFSD_MIN_HDR_SEQ_SZ) 432a649637cSAndy Adamson size = NFSD_MIN_HDR_SEQ_SZ; 433a649637cSAndy Adamson size -= NFSD_MIN_HDR_SEQ_SZ; 434a649637cSAndy Adamson if (size > NFSD_SLOT_CACHE_SIZE) 435a649637cSAndy Adamson size = NFSD_SLOT_CACHE_SIZE; 436a649637cSAndy Adamson 437a649637cSAndy Adamson /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ 438a649637cSAndy Adamson mem = fchan->maxreqs * size; 439a649637cSAndy Adamson if (mem > NFSD_MAX_MEM_PER_SESSION) { 440a649637cSAndy Adamson fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; 441a649637cSAndy Adamson if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) 442ec6b5d7bSAndy Adamson fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; 443a649637cSAndy Adamson mem = fchan->maxreqs * size; 444a649637cSAndy Adamson } 445ec6b5d7bSAndy Adamson 4464bd9b0f4SAndy Adamson spin_lock(&nfsd_drc_lock); 447a649637cSAndy Adamson /* bound the total session drc memory ussage */ 448a649637cSAndy Adamson if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { 449a649637cSAndy Adamson fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; 450a649637cSAndy Adamson mem = fchan->maxreqs * size; 451a649637cSAndy Adamson } 4520c193054SAndy Adamson nfsd_drc_mem_used += mem; 4534bd9b0f4SAndy Adamson spin_unlock(&nfsd_drc_lock); 454ec6b5d7bSAndy Adamson 455b101ebbcSAndy Adamson if (fchan->maxreqs == 0) 456bdac86e2SAndy Adamson return nfserr_serverfault; 457ec6b5d7bSAndy Adamson 458a649637cSAndy Adamson fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; 459b101ebbcSAndy Adamson return 0; 460ec6b5d7bSAndy Adamson } 461ec6b5d7bSAndy Adamson 462ec6b5d7bSAndy Adamson /* 463ec6b5d7bSAndy Adamson * fchan holds the client values on input, and the server values on output 464ddc04fd4SAndy Adamson * sv_max_mesg is the maximum payload plus one page for overhead. 465ec6b5d7bSAndy Adamson */ 466ec6b5d7bSAndy Adamson static int init_forechannel_attrs(struct svc_rqst *rqstp, 4676c18ba9fSAlexandros Batsakis struct nfsd4_channel_attrs *session_fchan, 468ec6b5d7bSAndy Adamson struct nfsd4_channel_attrs *fchan) 469ec6b5d7bSAndy Adamson { 470ec6b5d7bSAndy Adamson int status = 0; 471ddc04fd4SAndy Adamson __u32 maxcount = nfsd_serv->sv_max_mesg; 472ec6b5d7bSAndy Adamson 473ec6b5d7bSAndy Adamson /* headerpadsz set to zero in encode routine */ 474ec6b5d7bSAndy Adamson 475ec6b5d7bSAndy Adamson /* Use the client's max request and max response size if possible */ 476ec6b5d7bSAndy Adamson if (fchan->maxreq_sz > maxcount) 477ec6b5d7bSAndy Adamson fchan->maxreq_sz = maxcount; 4786c18ba9fSAlexandros Batsakis session_fchan->maxreq_sz = fchan->maxreq_sz; 479ec6b5d7bSAndy Adamson 480ec6b5d7bSAndy Adamson if (fchan->maxresp_sz > maxcount) 481ec6b5d7bSAndy Adamson fchan->maxresp_sz = maxcount; 4826c18ba9fSAlexandros Batsakis session_fchan->maxresp_sz = fchan->maxresp_sz; 483ec6b5d7bSAndy Adamson 484ec6b5d7bSAndy Adamson /* Use the client's maxops if possible */ 485ec6b5d7bSAndy Adamson if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) 486ec6b5d7bSAndy Adamson fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; 4876c18ba9fSAlexandros Batsakis session_fchan->maxops = fchan->maxops; 488ec6b5d7bSAndy Adamson 489ec6b5d7bSAndy Adamson /* FIXME: Error means no more DRC pages so the server should 490ec6b5d7bSAndy Adamson * recover pages from existing sessions. For now fail session 491ec6b5d7bSAndy Adamson * creation. 492ec6b5d7bSAndy Adamson */ 493a649637cSAndy Adamson status = set_forechannel_drc_size(fchan); 494ec6b5d7bSAndy Adamson 495a649637cSAndy Adamson session_fchan->maxresp_cached = fchan->maxresp_cached; 4966c18ba9fSAlexandros Batsakis session_fchan->maxreqs = fchan->maxreqs; 497a649637cSAndy Adamson 498a649637cSAndy Adamson dprintk("%s status %d\n", __func__, status); 499ec6b5d7bSAndy Adamson return status; 500ec6b5d7bSAndy Adamson } 501ec6b5d7bSAndy Adamson 502557ce264SAndy Adamson static void 503557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 504557ce264SAndy Adamson { 505557ce264SAndy Adamson int i; 506557ce264SAndy Adamson 507557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 508557ce264SAndy Adamson kfree(ses->se_slots[i]); 509557ce264SAndy Adamson } 510557ce264SAndy Adamson 511efe0cb6dSJ. Bruce Fields /* 512efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 513efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 514efe0cb6dSJ. Bruce Fields */ 515efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 516efe0cb6dSJ. Bruce Fields { 517efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 518efe0cb6dSJ. Bruce Fields } 519efe0cb6dSJ. Bruce Fields 520ec6b5d7bSAndy Adamson static int 521ec6b5d7bSAndy Adamson alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, 522ec6b5d7bSAndy Adamson struct nfsd4_create_session *cses) 523ec6b5d7bSAndy Adamson { 524ec6b5d7bSAndy Adamson struct nfsd4_session *new, tmp; 525557ce264SAndy Adamson struct nfsd4_slot *sp; 526557ce264SAndy Adamson int idx, slotsize, cachesize, i; 527557ce264SAndy Adamson int status; 528ec6b5d7bSAndy Adamson 529ec6b5d7bSAndy Adamson memset(&tmp, 0, sizeof(tmp)); 530ec6b5d7bSAndy Adamson 531ec6b5d7bSAndy Adamson /* FIXME: For now, we just accept the client back channel attributes. */ 5326c18ba9fSAlexandros Batsakis tmp.se_bchannel = cses->back_channel; 5336c18ba9fSAlexandros Batsakis status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, 5346c18ba9fSAlexandros Batsakis &cses->fore_channel); 535ec6b5d7bSAndy Adamson if (status) 536ec6b5d7bSAndy Adamson goto out; 537ec6b5d7bSAndy Adamson 538557ce264SAndy Adamson BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) 539557ce264SAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 540557ce264SAndy Adamson 541557ce264SAndy Adamson status = nfserr_serverfault; 542557ce264SAndy Adamson /* allocate struct nfsd4_session and slot table pointers in one piece */ 543557ce264SAndy Adamson slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); 544ec6b5d7bSAndy Adamson new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); 545ec6b5d7bSAndy Adamson if (!new) 546ec6b5d7bSAndy Adamson goto out; 547ec6b5d7bSAndy Adamson 548ec6b5d7bSAndy Adamson memcpy(new, &tmp, sizeof(*new)); 549ec6b5d7bSAndy Adamson 550557ce264SAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 551efe0cb6dSJ. Bruce Fields cachesize = slot_bytes(&new->se_fchannel); 552557ce264SAndy Adamson for (i = 0; i < new->se_fchannel.maxreqs; i++) { 553557ce264SAndy Adamson sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); 554557ce264SAndy Adamson if (!sp) 555557ce264SAndy Adamson goto out_free; 556557ce264SAndy Adamson new->se_slots[i] = sp; 557557ce264SAndy Adamson } 558557ce264SAndy Adamson 559ec6b5d7bSAndy Adamson new->se_client = clp; 560ec6b5d7bSAndy Adamson gen_sessionid(new); 561ec6b5d7bSAndy Adamson idx = hash_sessionid(&new->se_sessionid); 562ec6b5d7bSAndy Adamson memcpy(clp->cl_sessionid.data, new->se_sessionid.data, 563ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 564ec6b5d7bSAndy Adamson 565ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 566ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 567ec6b5d7bSAndy Adamson spin_lock(&sessionid_lock); 568ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 569ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 570ec6b5d7bSAndy Adamson spin_unlock(&sessionid_lock); 571ec6b5d7bSAndy Adamson 572ec6b5d7bSAndy Adamson status = nfs_ok; 573ec6b5d7bSAndy Adamson out: 574ec6b5d7bSAndy Adamson return status; 575557ce264SAndy Adamson out_free: 576557ce264SAndy Adamson free_session_slots(new); 577557ce264SAndy Adamson kfree(new); 578557ce264SAndy Adamson goto out; 579ec6b5d7bSAndy Adamson } 580ec6b5d7bSAndy Adamson 5815282fd72SMarc Eshel /* caller must hold sessionid_lock */ 5825282fd72SMarc Eshel static struct nfsd4_session * 5835282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 5845282fd72SMarc Eshel { 5855282fd72SMarc Eshel struct nfsd4_session *elem; 5865282fd72SMarc Eshel int idx; 5875282fd72SMarc Eshel 5885282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 5895282fd72SMarc Eshel idx = hash_sessionid(sessionid); 5905282fd72SMarc Eshel dprintk("%s: idx is %d\n", __func__, idx); 5915282fd72SMarc Eshel /* Search in the appropriate list */ 5925282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 5935282fd72SMarc Eshel dump_sessionid("list traversal", &elem->se_sessionid); 5945282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 5955282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 5965282fd72SMarc Eshel return elem; 5975282fd72SMarc Eshel } 5985282fd72SMarc Eshel } 5995282fd72SMarc Eshel 6005282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 6015282fd72SMarc Eshel return NULL; 6025282fd72SMarc Eshel } 6035282fd72SMarc Eshel 6045282fd72SMarc Eshel /* caller must hold sessionid_lock */ 6057116ed6bSAndy Adamson static void 6065282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 6077116ed6bSAndy Adamson { 6087116ed6bSAndy Adamson list_del(&ses->se_hash); 6097116ed6bSAndy Adamson list_del(&ses->se_perclnt); 6105282fd72SMarc Eshel } 6115282fd72SMarc Eshel 6125282fd72SMarc Eshel static void 6135282fd72SMarc Eshel release_session(struct nfsd4_session *ses) 6145282fd72SMarc Eshel { 6155282fd72SMarc Eshel spin_lock(&sessionid_lock); 6165282fd72SMarc Eshel unhash_session(ses); 6175282fd72SMarc Eshel spin_unlock(&sessionid_lock); 6187116ed6bSAndy Adamson nfsd4_put_session(ses); 6197116ed6bSAndy Adamson } 6207116ed6bSAndy Adamson 6217116ed6bSAndy Adamson void 6227116ed6bSAndy Adamson free_session(struct kref *kref) 6237116ed6bSAndy Adamson { 6247116ed6bSAndy Adamson struct nfsd4_session *ses; 625dd829c45SJ. Bruce Fields int mem; 6267116ed6bSAndy Adamson 6277116ed6bSAndy Adamson ses = container_of(kref, struct nfsd4_session, se_ref); 628be98d1bbSAndy Adamson spin_lock(&nfsd_drc_lock); 629efe0cb6dSJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 630dd829c45SJ. Bruce Fields nfsd_drc_mem_used -= mem; 631be98d1bbSAndy Adamson spin_unlock(&nfsd_drc_lock); 632557ce264SAndy Adamson free_session_slots(ses); 6337116ed6bSAndy Adamson kfree(ses); 6347116ed6bSAndy Adamson } 6357116ed6bSAndy Adamson 6361da177e4SLinus Torvalds static inline void 6371da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 6381da177e4SLinus Torvalds { 6391da177e4SLinus Torvalds /* 6401da177e4SLinus Torvalds * Move client to the end to the LRU list. 6411da177e4SLinus Torvalds */ 6421da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 6431da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 6441da177e4SLinus Torvalds clp->cl_clientid.cl_id); 6451da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 6461da177e4SLinus Torvalds clp->cl_time = get_seconds(); 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 6501da177e4SLinus Torvalds static int 6511da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 6521da177e4SLinus Torvalds { 6531da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 6541da177e4SLinus Torvalds return 0; 65560adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 65660adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 6571da177e4SLinus Torvalds return 1; 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds /* 6611da177e4SLinus Torvalds * XXX Should we use a slab cache ? 6621da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 6631da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 6641da177e4SLinus Torvalds */ 66535bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 6661da177e4SLinus Torvalds { 6671da177e4SLinus Torvalds struct nfs4_client *clp; 6681da177e4SLinus Torvalds 66935bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 67035bba9a3SJ. Bruce Fields if (clp == NULL) 67135bba9a3SJ. Bruce Fields return NULL; 67235bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 67335bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 67435bba9a3SJ. Bruce Fields kfree(clp); 67535bba9a3SJ. Bruce Fields return NULL; 67635bba9a3SJ. Bruce Fields } 6771da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 6781da177e4SLinus Torvalds clp->cl_name.len = name.len; 6791da177e4SLinus Torvalds return clp; 6801da177e4SLinus Torvalds } 6811da177e4SLinus Torvalds 6821b1a9b31SJ. Bruce Fields static void 6831b1a9b31SJ. Bruce Fields shutdown_callback_client(struct nfs4_client *clp) 6841b1a9b31SJ. Bruce Fields { 685c237dc03SJ. Bruce Fields struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client; 6861b1a9b31SJ. Bruce Fields 6871b1a9b31SJ. Bruce Fields if (clnt) { 688404ec117SJ. Bruce Fields /* 689404ec117SJ. Bruce Fields * Callback threads take a reference on the client, so there 690404ec117SJ. Bruce Fields * should be no outstanding callbacks at this point. 691404ec117SJ. Bruce Fields */ 692c237dc03SJ. Bruce Fields clp->cl_cb_conn.cb_client = NULL; 6931b1a9b31SJ. Bruce Fields rpc_shutdown_client(clnt); 6941b1a9b31SJ. Bruce Fields } 6951b1a9b31SJ. Bruce Fields } 6961b1a9b31SJ. Bruce Fields 6971da177e4SLinus Torvalds static inline void 6981da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 6991da177e4SLinus Torvalds { 7001b1a9b31SJ. Bruce Fields shutdown_callback_client(clp); 70138524ab3SAndy Adamson if (clp->cl_cb_xprt) 70238524ab3SAndy Adamson svc_xprt_put(clp->cl_cb_xprt); 7031da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 7041da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 70568e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 7061da177e4SLinus Torvalds kfree(clp->cl_name.data); 7071da177e4SLinus Torvalds kfree(clp); 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds 7101da177e4SLinus Torvalds void 7111da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 7121da177e4SLinus Torvalds { 7131da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 7141da177e4SLinus Torvalds free_client(clp); 7151da177e4SLinus Torvalds } 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvalds static void 7181da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 7191da177e4SLinus Torvalds { 7201da177e4SLinus Torvalds struct nfs4_stateowner *sop; 7211da177e4SLinus Torvalds struct nfs4_delegation *dp; 7221da177e4SLinus Torvalds struct list_head reaplist; 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 7251da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 7281da177e4SLinus Torvalds spin_lock(&recall_lock); 729ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 730ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 7311da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 7321da177e4SLinus Torvalds dp->dl_flock); 733ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 7341da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds spin_unlock(&recall_lock); 7371da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 7381da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 7391da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 7401da177e4SLinus Torvalds unhash_delegation(dp); 7411da177e4SLinus Torvalds } 7421da177e4SLinus Torvalds list_del(&clp->cl_idhash); 7431da177e4SLinus Torvalds list_del(&clp->cl_strhash); 7441da177e4SLinus Torvalds list_del(&clp->cl_lru); 745ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 746ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 747f044ff83SJ. Bruce Fields release_openowner(sop); 7481da177e4SLinus Torvalds } 749c4bf7868SMarc Eshel while (!list_empty(&clp->cl_sessions)) { 750c4bf7868SMarc Eshel struct nfsd4_session *ses; 751c4bf7868SMarc Eshel ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 752c4bf7868SMarc Eshel se_perclnt); 753c4bf7868SMarc Eshel release_session(ses); 754c4bf7868SMarc Eshel } 7551da177e4SLinus Torvalds put_nfs4_client(clp); 7561da177e4SLinus Torvalds } 7571da177e4SLinus Torvalds 75835bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 75935bba9a3SJ. Bruce Fields { 76035bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 76135bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 76435bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 76535bba9a3SJ. Bruce Fields { 7661da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 7671da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 7681da177e4SLinus Torvalds } 7691da177e4SLinus Torvalds 77035bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 77135bba9a3SJ. Bruce Fields { 7721da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 7731da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 7741da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 7751da177e4SLinus Torvalds get_group_info(target->cr_group_info); 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds 77835bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 779599e0a22SJ. Bruce Fields { 780a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 7811da177e4SLinus Torvalds } 7821da177e4SLinus Torvalds 7831da177e4SLinus Torvalds static int 784599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 785599e0a22SJ. Bruce Fields { 786599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds static int 790599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 791599e0a22SJ. Bruce Fields { 792599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 7931da177e4SLinus Torvalds } 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds /* XXX what about NGROUP */ 7961da177e4SLinus Torvalds static int 797599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 798599e0a22SJ. Bruce Fields { 799599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 8025ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 8035ec7b46cSJ. Bruce Fields { 8045ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 8055ec7b46cSJ. Bruce Fields 8061da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 8071da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 8081da177e4SLinus Torvalds } 8091da177e4SLinus Torvalds 810deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 811deda2faaSJ. Bruce Fields { 812deda2faaSJ. Bruce Fields static u32 i; 8131da177e4SLinus Torvalds u32 *p; 8141da177e4SLinus Torvalds 8151da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 816deda2faaSJ. Bruce Fields *p++ = get_seconds(); 817deda2faaSJ. Bruce Fields *p++ = i++; 8181da177e4SLinus Torvalds } 8191da177e4SLinus Torvalds 820b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 821b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 822b09333c4SRicardo Labiaga { 823b09333c4SRicardo Labiaga struct nfs4_client *clp; 824b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 825b09333c4SRicardo Labiaga char *princ; 826b09333c4SRicardo Labiaga 827b09333c4SRicardo Labiaga clp = alloc_client(name); 828b09333c4SRicardo Labiaga if (clp == NULL) 829b09333c4SRicardo Labiaga return NULL; 830b09333c4SRicardo Labiaga 831b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 832b09333c4SRicardo Labiaga if (princ) { 833b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 834b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 835b09333c4SRicardo Labiaga free_client(clp); 836b09333c4SRicardo Labiaga return NULL; 837b09333c4SRicardo Labiaga } 838b09333c4SRicardo Labiaga } 839b09333c4SRicardo Labiaga 840b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 841b09333c4SRicardo Labiaga atomic_set(&clp->cl_count, 1); 842b09333c4SRicardo Labiaga atomic_set(&clp->cl_cb_conn.cb_set, 0); 843b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 844b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 845b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 846b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 847b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_sessions); 848b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 849b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 850b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 851b09333c4SRicardo Labiaga copy_verf(clp, verf); 852b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 853b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 854b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 855b09333c4SRicardo Labiaga gen_confirm(clp); 856b09333c4SRicardo Labiaga 857b09333c4SRicardo Labiaga return clp; 858b09333c4SRicardo Labiaga } 859b09333c4SRicardo Labiaga 86035bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 86135bba9a3SJ. Bruce Fields { 8621da177e4SLinus Torvalds if (name.len == 0) 8631da177e4SLinus Torvalds return 0; 8641da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 8652fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 8661da177e4SLinus Torvalds return 0; 8671da177e4SLinus Torvalds } 8681da177e4SLinus Torvalds return 1; 8691da177e4SLinus Torvalds } 8701da177e4SLinus Torvalds 871fd39ca9aSNeilBrown static void 8721da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 8731da177e4SLinus Torvalds { 8741da177e4SLinus Torvalds unsigned int idhashval; 8751da177e4SLinus Torvalds 8761da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 8771da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 8781da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 8791da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 8801da177e4SLinus Torvalds clp->cl_time = get_seconds(); 8811da177e4SLinus Torvalds } 8821da177e4SLinus Torvalds 883fd39ca9aSNeilBrown static void 8841da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 8851da177e4SLinus Torvalds { 8861da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 8871da177e4SLinus Torvalds unsigned int strhashval; 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 8901da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 891f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 892a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 8931da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 8941da177e4SLinus Torvalds renew_client(clp); 8951da177e4SLinus Torvalds } 8961da177e4SLinus Torvalds 8971da177e4SLinus Torvalds static struct nfs4_client * 8981da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 8991da177e4SLinus Torvalds { 9001da177e4SLinus Torvalds struct nfs4_client *clp; 9011da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 9021da177e4SLinus Torvalds 9031da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 904599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 9051da177e4SLinus Torvalds return clp; 9061da177e4SLinus Torvalds } 9071da177e4SLinus Torvalds return NULL; 9081da177e4SLinus Torvalds } 9091da177e4SLinus Torvalds 9101da177e4SLinus Torvalds static struct nfs4_client * 9111da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 9121da177e4SLinus Torvalds { 9131da177e4SLinus Torvalds struct nfs4_client *clp; 9141da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 9151da177e4SLinus Torvalds 9161da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 917599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 9181da177e4SLinus Torvalds return clp; 9191da177e4SLinus Torvalds } 9201da177e4SLinus Torvalds return NULL; 9211da177e4SLinus Torvalds } 9221da177e4SLinus Torvalds 923a1bcecd2SAndy Adamson /* 924a1bcecd2SAndy Adamson * Return 1 iff clp's clientid establishment method matches the use_exchange_id 925a1bcecd2SAndy Adamson * parameter. Matching is based on the fact the at least one of the 926a1bcecd2SAndy Adamson * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 927a1bcecd2SAndy Adamson * 928a1bcecd2SAndy Adamson * FIXME: we need to unify the clientid namespaces for nfsv4.x 929a1bcecd2SAndy Adamson * and correctly deal with client upgrade/downgrade in EXCHANGE_ID 930a1bcecd2SAndy Adamson * and SET_CLIENTID{,_CONFIRM} 931a1bcecd2SAndy Adamson */ 932a1bcecd2SAndy Adamson static inline int 933a1bcecd2SAndy Adamson match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) 934a1bcecd2SAndy Adamson { 935a1bcecd2SAndy Adamson bool has_exchange_flags = (clp->cl_exchange_flags != 0); 936a1bcecd2SAndy Adamson return use_exchange_id == has_exchange_flags; 937a1bcecd2SAndy Adamson } 938a1bcecd2SAndy Adamson 93928ce6054SNeilBrown static struct nfs4_client * 940a1bcecd2SAndy Adamson find_confirmed_client_by_str(const char *dname, unsigned int hashval, 941a1bcecd2SAndy Adamson bool use_exchange_id) 94228ce6054SNeilBrown { 94328ce6054SNeilBrown struct nfs4_client *clp; 94428ce6054SNeilBrown 94528ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 946a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 947a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 94828ce6054SNeilBrown return clp; 94928ce6054SNeilBrown } 95028ce6054SNeilBrown return NULL; 95128ce6054SNeilBrown } 95228ce6054SNeilBrown 95328ce6054SNeilBrown static struct nfs4_client * 954a1bcecd2SAndy Adamson find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, 955a1bcecd2SAndy Adamson bool use_exchange_id) 95628ce6054SNeilBrown { 95728ce6054SNeilBrown struct nfs4_client *clp; 95828ce6054SNeilBrown 95928ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 960a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 961a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 96228ce6054SNeilBrown return clp; 96328ce6054SNeilBrown } 96428ce6054SNeilBrown return NULL; 96528ce6054SNeilBrown } 96628ce6054SNeilBrown 967fd39ca9aSNeilBrown static void 968fbf4665fSJeff Layton gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) 9691da177e4SLinus Torvalds { 970c237dc03SJ. Bruce Fields struct nfs4_cb_conn *cb = &clp->cl_cb_conn; 9717077ecbaSJeff Layton unsigned short expected_family; 9721da177e4SLinus Torvalds 9737077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 9747077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 9757077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 9767077ecbaSJeff Layton expected_family = AF_INET; 9777077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 9787077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 9797077ecbaSJeff Layton expected_family = AF_INET6; 9807077ecbaSJeff Layton else 9811da177e4SLinus Torvalds goto out_err; 9821da177e4SLinus Torvalds 983aa9a4ec7SJeff Layton cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, 984aa9a4ec7SJeff Layton se->se_callback_addr_len, 985aa9a4ec7SJeff Layton (struct sockaddr *) &cb->cb_addr, 986aa9a4ec7SJeff Layton sizeof(cb->cb_addr)); 987aa9a4ec7SJeff Layton 9887077ecbaSJeff Layton if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) 9891da177e4SLinus Torvalds goto out_err; 990aa9a4ec7SJeff Layton 991fbf4665fSJeff Layton if (cb->cb_addr.ss_family == AF_INET6) 992fbf4665fSJeff Layton ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; 993fbf4665fSJeff Layton 994ab52ae6dSAndy Adamson cb->cb_minorversion = 0; 9951da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 9961da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 9971da177e4SLinus Torvalds return; 9981da177e4SLinus Torvalds out_err: 999aa9a4ec7SJeff Layton cb->cb_addr.ss_family = AF_UNSPEC; 1000aa9a4ec7SJeff Layton cb->cb_addrlen = 0; 1001849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 10021da177e4SLinus Torvalds "will not receive delegations\n", 10031da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds return; 10061da177e4SLinus Torvalds } 10071da177e4SLinus Torvalds 1008074fe897SAndy Adamson /* 1009557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1010074fe897SAndy Adamson */ 1011074fe897SAndy Adamson void 1012074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1013074fe897SAndy Adamson { 1014557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1015557ce264SAndy Adamson unsigned int base; 1016074fe897SAndy Adamson 1017557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1018074fe897SAndy Adamson 1019557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1020557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1021bf864a31SAndy Adamson 1022bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1023557ce264SAndy Adamson slot->sl_datalen = 0; 1024bf864a31SAndy Adamson return; 1025bf864a31SAndy Adamson } 1026557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1027557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1028557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1029557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1030557ce264SAndy Adamson slot->sl_datalen)) 1031557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1032557ce264SAndy Adamson return; 1033074fe897SAndy Adamson } 1034074fe897SAndy Adamson 1035074fe897SAndy Adamson /* 1036abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1037abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1038abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1039abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1040abfabf8cSAndy Adamson * 1041074fe897SAndy Adamson */ 1042abfabf8cSAndy Adamson static __be32 1043abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1044abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1045074fe897SAndy Adamson { 1046abfabf8cSAndy Adamson struct nfsd4_op *op; 1047abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1048074fe897SAndy Adamson 1049abfabf8cSAndy Adamson dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, 1050557ce264SAndy Adamson resp->opcnt, resp->cstate.slot->sl_cachethis); 1051abfabf8cSAndy Adamson 1052abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1053abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1054abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1055abfabf8cSAndy Adamson 1056abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 1057557ce264SAndy Adamson if (args->opcnt > 1 && slot->sl_cachethis == 0) { 1058abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1059abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1060abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1061074fe897SAndy Adamson } 1062abfabf8cSAndy Adamson return op->status; 1063074fe897SAndy Adamson } 1064074fe897SAndy Adamson 1065074fe897SAndy Adamson /* 1066557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1067557ce264SAndy Adamson * session values. 1068074fe897SAndy Adamson */ 1069074fe897SAndy Adamson __be32 1070bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1071bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1072074fe897SAndy Adamson { 1073557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1074074fe897SAndy Adamson __be32 status; 1075074fe897SAndy Adamson 1076557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1077074fe897SAndy Adamson 1078abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1079abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1080abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1081abfabf8cSAndy Adamson return status; 1082074fe897SAndy Adamson 1083557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1084557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1085074fe897SAndy Adamson 1086557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1087557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1088557ce264SAndy Adamson status = slot->sl_status; 1089074fe897SAndy Adamson 1090074fe897SAndy Adamson return status; 1091074fe897SAndy Adamson } 1092074fe897SAndy Adamson 10930733d213SAndy Adamson /* 10940733d213SAndy Adamson * Set the exchange_id flags returned by the server. 10950733d213SAndy Adamson */ 10960733d213SAndy Adamson static void 10970733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 10980733d213SAndy Adamson { 10990733d213SAndy Adamson /* pNFS is not supported */ 11000733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 11010733d213SAndy Adamson 11020733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 11030733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 11040733d213SAndy Adamson 11050733d213SAndy Adamson /* set the wire flags to return to client. */ 11060733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 11070733d213SAndy Adamson } 11080733d213SAndy Adamson 1109b37ad28bSAl Viro __be32 1110069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1111069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1112069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1113069b6ad4SAndy Adamson { 11140733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 11150733d213SAndy Adamson int status; 11160733d213SAndy Adamson unsigned int strhashval; 11170733d213SAndy Adamson char dname[HEXDIR_LEN]; 1118363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 11190733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1120363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 11210733d213SAndy Adamson 1122363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 11230733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1124363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 11250733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1126363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 11270733d213SAndy Adamson 11280733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 11290733d213SAndy Adamson return nfserr_inval; 11300733d213SAndy Adamson 11310733d213SAndy Adamson /* Currently only support SP4_NONE */ 11320733d213SAndy Adamson switch (exid->spa_how) { 11330733d213SAndy Adamson case SP4_NONE: 11340733d213SAndy Adamson break; 11350733d213SAndy Adamson case SP4_SSV: 11360733d213SAndy Adamson return nfserr_encr_alg_unsupp; 11370733d213SAndy Adamson default: 11380733d213SAndy Adamson BUG(); /* checked by xdr code */ 11390733d213SAndy Adamson case SP4_MACH_CRED: 11400733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 11410733d213SAndy Adamson } 11420733d213SAndy Adamson 11430733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 11440733d213SAndy Adamson 11450733d213SAndy Adamson if (status) 11460733d213SAndy Adamson goto error; 11470733d213SAndy Adamson 11480733d213SAndy Adamson strhashval = clientstr_hashval(dname); 11490733d213SAndy Adamson 11500733d213SAndy Adamson nfs4_lock_state(); 11510733d213SAndy Adamson status = nfs_ok; 11520733d213SAndy Adamson 1153a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, true); 11540733d213SAndy Adamson if (conf) { 11550733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 11560733d213SAndy Adamson /* 18.35.4 case 8 */ 11570733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 11580733d213SAndy Adamson status = nfserr_not_same; 11590733d213SAndy Adamson goto out; 11600733d213SAndy Adamson } 11610733d213SAndy Adamson /* Client reboot: destroy old state */ 11620733d213SAndy Adamson expire_client(conf); 11630733d213SAndy Adamson goto out_new; 11640733d213SAndy Adamson } 11650733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 11660733d213SAndy Adamson /* 18.35.4 case 9 */ 11670733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 11680733d213SAndy Adamson status = nfserr_perm; 11690733d213SAndy Adamson goto out; 11700733d213SAndy Adamson } 11710733d213SAndy Adamson expire_client(conf); 11720733d213SAndy Adamson goto out_new; 11730733d213SAndy Adamson } 11740733d213SAndy Adamson /* 11750733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 11760733d213SAndy Adamson * confirmed client id (18.35.3). 11770733d213SAndy Adamson */ 11780733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 11790733d213SAndy Adamson 11800733d213SAndy Adamson /* 11810733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 11820733d213SAndy Adamson * Leave confirmed record intact and return same result. 11830733d213SAndy Adamson */ 11840733d213SAndy Adamson copy_verf(conf, &verf); 11850733d213SAndy Adamson new = conf; 11860733d213SAndy Adamson goto out_copy; 11876ddbbbfeSMike Sager } 11886ddbbbfeSMike Sager 11890733d213SAndy Adamson /* 18.35.4 case 7 */ 11900733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 11910733d213SAndy Adamson status = nfserr_noent; 11920733d213SAndy Adamson goto out; 11930733d213SAndy Adamson } 11940733d213SAndy Adamson 1195a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, true); 11960733d213SAndy Adamson if (unconf) { 11970733d213SAndy Adamson /* 11980733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 11990733d213SAndy Adamson * a new unconfirmed record should be generated regardless 12000733d213SAndy Adamson * of whether any properties have changed. 12010733d213SAndy Adamson */ 12020733d213SAndy Adamson expire_client(unconf); 12030733d213SAndy Adamson } 12040733d213SAndy Adamson 12050733d213SAndy Adamson out_new: 12060733d213SAndy Adamson /* Normal case */ 1207b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 12080733d213SAndy Adamson if (new == NULL) { 1209bdac86e2SAndy Adamson status = nfserr_serverfault; 12100733d213SAndy Adamson goto out; 12110733d213SAndy Adamson } 12120733d213SAndy Adamson 12130733d213SAndy Adamson gen_clid(new); 12140733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 12150733d213SAndy Adamson out_copy: 12160733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 12170733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 12180733d213SAndy Adamson 121938eb76a5SAndy Adamson exid->seqid = 1; 12200733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 12210733d213SAndy Adamson 12220733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 122349557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 12240733d213SAndy Adamson status = nfs_ok; 12250733d213SAndy Adamson 12260733d213SAndy Adamson out: 12270733d213SAndy Adamson nfs4_unlock_state(); 12280733d213SAndy Adamson error: 12290733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 12300733d213SAndy Adamson return status; 1231069b6ad4SAndy Adamson } 1232069b6ad4SAndy Adamson 1233b85d4c01SBenny Halevy static int 123488e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1235b85d4c01SBenny Halevy { 123688e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 123788e588d5SAndy Adamson slot_seqid); 1238b85d4c01SBenny Halevy 1239b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 124088e588d5SAndy Adamson if (slot_inuse) { 124188e588d5SAndy Adamson if (seqid == slot_seqid) 1242b85d4c01SBenny Halevy return nfserr_jukebox; 1243b85d4c01SBenny Halevy else 1244b85d4c01SBenny Halevy return nfserr_seq_misordered; 1245b85d4c01SBenny Halevy } 1246b85d4c01SBenny Halevy /* Normal */ 124788e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1248b85d4c01SBenny Halevy return nfs_ok; 1249b85d4c01SBenny Halevy /* Replay */ 125088e588d5SAndy Adamson if (seqid == slot_seqid) 1251b85d4c01SBenny Halevy return nfserr_replay_cache; 1252b85d4c01SBenny Halevy /* Wraparound */ 125388e588d5SAndy Adamson if (seqid == 1 && (slot_seqid + 1) == 0) 1254b85d4c01SBenny Halevy return nfs_ok; 1255b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1256b85d4c01SBenny Halevy return nfserr_seq_misordered; 1257b85d4c01SBenny Halevy } 1258b85d4c01SBenny Halevy 125949557cc7SAndy Adamson /* 126049557cc7SAndy Adamson * Cache the create session result into the create session single DRC 126149557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 126249557cc7SAndy Adamson * Do this for solo or embedded create session operations. 126349557cc7SAndy Adamson */ 126449557cc7SAndy Adamson static void 126549557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 126649557cc7SAndy Adamson struct nfsd4_clid_slot *slot, int nfserr) 126749557cc7SAndy Adamson { 126849557cc7SAndy Adamson slot->sl_status = nfserr; 126949557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 127049557cc7SAndy Adamson } 127149557cc7SAndy Adamson 127249557cc7SAndy Adamson static __be32 127349557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 127449557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 127549557cc7SAndy Adamson { 127649557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 127749557cc7SAndy Adamson return slot->sl_status; 127849557cc7SAndy Adamson } 127949557cc7SAndy Adamson 1280069b6ad4SAndy Adamson __be32 1281069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1282069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1283069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1284069b6ad4SAndy Adamson { 1285363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1286ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 128749557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 1288ec6b5d7bSAndy Adamson int status = 0; 1289ec6b5d7bSAndy Adamson 1290ec6b5d7bSAndy Adamson nfs4_lock_state(); 1291ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1292ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1293ec6b5d7bSAndy Adamson 1294ec6b5d7bSAndy Adamson if (conf) { 129549557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 129649557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 129738eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1298ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 129949557cc7SAndy Adamson cs_slot->sl_seqid); 130038eb76a5SAndy Adamson /* Return the cached reply status */ 130149557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 130238eb76a5SAndy Adamson goto out; 130349557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1304ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1305ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1306ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 130749557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1308ec6b5d7bSAndy Adamson goto out; 1309ec6b5d7bSAndy Adamson } 131049557cc7SAndy Adamson cs_slot->sl_seqid++; 1311ec6b5d7bSAndy Adamson } else if (unconf) { 1312ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1313363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1314ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1315ec6b5d7bSAndy Adamson goto out; 1316ec6b5d7bSAndy Adamson } 1317ec6b5d7bSAndy Adamson 131849557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 131949557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 132038eb76a5SAndy Adamson if (status) { 132138eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1322ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 132349557cc7SAndy Adamson goto out_cache; 1324ec6b5d7bSAndy Adamson } 1325ec6b5d7bSAndy Adamson 132649557cc7SAndy Adamson cs_slot->sl_seqid++; /* from 0 to 1 */ 1327ec6b5d7bSAndy Adamson move_to_confirmed(unconf); 1328ec6b5d7bSAndy Adamson 1329ec6b5d7bSAndy Adamson /* 1330ec6b5d7bSAndy Adamson * We do not support RDMA or persistent sessions 1331ec6b5d7bSAndy Adamson */ 1332ec6b5d7bSAndy Adamson cr_ses->flags &= ~SESSION4_PERSIST; 1333ec6b5d7bSAndy Adamson cr_ses->flags &= ~SESSION4_RDMA; 1334ec6b5d7bSAndy Adamson 133538524ab3SAndy Adamson if (cr_ses->flags & SESSION4_BACK_CHAN) { 133638524ab3SAndy Adamson unconf->cl_cb_xprt = rqstp->rq_xprt; 133738524ab3SAndy Adamson svc_xprt_get(unconf->cl_cb_xprt); 133838524ab3SAndy Adamson rpc_copy_addr( 133938524ab3SAndy Adamson (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, 134038524ab3SAndy Adamson sa); 134138524ab3SAndy Adamson unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 134238524ab3SAndy Adamson unconf->cl_cb_conn.cb_minorversion = 134338524ab3SAndy Adamson cstate->minorversion; 134438524ab3SAndy Adamson unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; 13452a1d1b59SRicardo Labiaga unconf->cl_cb_seq_nr = 1; 134638524ab3SAndy Adamson nfsd4_probe_callback(unconf); 134738524ab3SAndy Adamson } 1348ec6b5d7bSAndy Adamson conf = unconf; 1349ec6b5d7bSAndy Adamson } else { 1350ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1351ec6b5d7bSAndy Adamson goto out; 1352ec6b5d7bSAndy Adamson } 1353ec6b5d7bSAndy Adamson 1354ec6b5d7bSAndy Adamson status = alloc_init_session(rqstp, conf, cr_ses); 1355ec6b5d7bSAndy Adamson if (status) 1356ec6b5d7bSAndy Adamson goto out; 1357ec6b5d7bSAndy Adamson 1358ec6b5d7bSAndy Adamson memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, 1359ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 136049557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1361ec6b5d7bSAndy Adamson 136249557cc7SAndy Adamson out_cache: 136349557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 136449557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 1365ec6b5d7bSAndy Adamson out: 1366ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1367ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1368ec6b5d7bSAndy Adamson return status; 1369069b6ad4SAndy Adamson } 1370069b6ad4SAndy Adamson 1371069b6ad4SAndy Adamson __be32 1372069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1373069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1374069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1375069b6ad4SAndy Adamson { 1376e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1377e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1378e10e0cfcSBenny Halevy 1379e10e0cfcSBenny Halevy /* Notes: 1380e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1381e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1382e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1383e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1384e10e0cfcSBenny Halevy */ 1385e10e0cfcSBenny Halevy 1386e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 1387e10e0cfcSBenny Halevy spin_lock(&sessionid_lock); 1388e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1389e10e0cfcSBenny Halevy if (!ses) { 1390e10e0cfcSBenny Halevy spin_unlock(&sessionid_lock); 1391e10e0cfcSBenny Halevy goto out; 1392e10e0cfcSBenny Halevy } 1393e10e0cfcSBenny Halevy 1394e10e0cfcSBenny Halevy unhash_session(ses); 1395e10e0cfcSBenny Halevy spin_unlock(&sessionid_lock); 1396e10e0cfcSBenny Halevy 1397e10e0cfcSBenny Halevy /* wait for callbacks */ 1398e10e0cfcSBenny Halevy shutdown_callback_client(ses->se_client); 1399e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1400e10e0cfcSBenny Halevy status = nfs_ok; 1401e10e0cfcSBenny Halevy out: 1402e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1403e10e0cfcSBenny Halevy return status; 1404069b6ad4SAndy Adamson } 1405069b6ad4SAndy Adamson 1406069b6ad4SAndy Adamson __be32 1407b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1408069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1409069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1410069b6ad4SAndy Adamson { 1411f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1412b85d4c01SBenny Halevy struct nfsd4_session *session; 1413b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1414b85d4c01SBenny Halevy int status; 1415b85d4c01SBenny Halevy 1416f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1417f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1418f9bb94c4SAndy Adamson 1419b85d4c01SBenny Halevy spin_lock(&sessionid_lock); 1420b85d4c01SBenny Halevy status = nfserr_badsession; 1421b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1422b85d4c01SBenny Halevy if (!session) 1423b85d4c01SBenny Halevy goto out; 1424b85d4c01SBenny Halevy 1425b85d4c01SBenny Halevy status = nfserr_badslot; 14266c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1427b85d4c01SBenny Halevy goto out; 1428b85d4c01SBenny Halevy 1429557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1430b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1431b85d4c01SBenny Halevy 1432a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1433a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1434a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1435a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1436a8dfdaebSAndy Adamson 143788e588d5SAndy Adamson status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); 1438b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1439b85d4c01SBenny Halevy cstate->slot = slot; 1440b85d4c01SBenny Halevy cstate->session = session; 1441da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1442557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1443bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1444da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1445aaf84eb9SBenny Halevy goto out; 1446b85d4c01SBenny Halevy } 1447b85d4c01SBenny Halevy if (status) 1448b85d4c01SBenny Halevy goto out; 1449b85d4c01SBenny Halevy 1450b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1451b85d4c01SBenny Halevy slot->sl_inuse = true; 1452b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1453557ce264SAndy Adamson slot->sl_cachethis = seq->cachethis; 1454b85d4c01SBenny Halevy 1455b85d4c01SBenny Halevy cstate->slot = slot; 1456b85d4c01SBenny Halevy cstate->session = session; 1457b85d4c01SBenny Halevy 1458aaf84eb9SBenny Halevy /* Hold a session reference until done processing the compound: 1459b85d4c01SBenny Halevy * nfsd4_put_session called only if the cstate slot is set. 1460b85d4c01SBenny Halevy */ 1461b85d4c01SBenny Halevy nfsd4_get_session(session); 1462b85d4c01SBenny Halevy out: 1463b85d4c01SBenny Halevy spin_unlock(&sessionid_lock); 1464aaf84eb9SBenny Halevy /* Renew the clientid on success and on replay */ 1465aaf84eb9SBenny Halevy if (cstate->session) { 1466aaf84eb9SBenny Halevy nfs4_lock_state(); 1467aaf84eb9SBenny Halevy renew_client(session->se_client); 1468aaf84eb9SBenny Halevy nfs4_unlock_state(); 1469aaf84eb9SBenny Halevy } 1470b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1471b85d4c01SBenny Halevy return status; 1472069b6ad4SAndy Adamson } 1473069b6ad4SAndy Adamson 1474069b6ad4SAndy Adamson __be32 1475b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1476b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 14771da177e4SLinus Torvalds { 1478363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 14791da177e4SLinus Torvalds struct xdr_netobj clname = { 14801da177e4SLinus Torvalds .len = setclid->se_namelen, 14811da177e4SLinus Torvalds .data = setclid->se_name, 14821da177e4SLinus Torvalds }; 14831da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 14841da177e4SLinus Torvalds unsigned int strhashval; 148528ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1486b37ad28bSAl Viro __be32 status; 1487a55370a3SNeilBrown char dname[HEXDIR_LEN]; 14881da177e4SLinus Torvalds 14891da177e4SLinus Torvalds if (!check_name(clname)) 149073aea4ecSNeil Brown return nfserr_inval; 14911da177e4SLinus Torvalds 1492a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1493a55370a3SNeilBrown if (status) 149473aea4ecSNeil Brown return status; 1495a55370a3SNeilBrown 14961da177e4SLinus Torvalds /* 14971da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 14981da177e4SLinus Torvalds * We get here on a DRC miss. 14991da177e4SLinus Torvalds */ 15001da177e4SLinus Torvalds 1501a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 15021da177e4SLinus Torvalds 15031da177e4SLinus Torvalds nfs4_lock_state(); 1504a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, false); 150528ce6054SNeilBrown if (conf) { 1506a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 15071da177e4SLinus Torvalds status = nfserr_clid_inuse; 1508026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1509363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 1510363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 1511363168b4SJeff Layton sizeof(addr_str)); 1512026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 1513363168b4SJeff Layton "at %s\n", addr_str); 15141da177e4SLinus Torvalds goto out; 15151da177e4SLinus Torvalds } 15161da177e4SLinus Torvalds } 1517a186e767SJ. Bruce Fields /* 1518a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1519a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1520a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1521a186e767SJ. Bruce Fields */ 1522a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, false); 15231da177e4SLinus Torvalds status = nfserr_resource; 15241da177e4SLinus Torvalds if (!conf) { 15251da177e4SLinus Torvalds /* 1526a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1527a186e767SJ. Bruce Fields * placed first, because it is the normal case 15281da177e4SLinus Torvalds */ 15291da177e4SLinus Torvalds if (unconf) 15301da177e4SLinus Torvalds expire_client(unconf); 1531b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1532a55370a3SNeilBrown if (new == NULL) 15331da177e4SLinus Torvalds goto out; 15341da177e4SLinus Torvalds gen_clid(new); 1535599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 15361da177e4SLinus Torvalds /* 1537a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1538a186e767SJ. Bruce Fields * probable callback update 15391da177e4SLinus Torvalds */ 154031f4a6c1SNeilBrown if (unconf) { 154131f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 154231f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 154331f4a6c1SNeilBrown * This has the advantage that there is at most 154431f4a6c1SNeilBrown * one {*x***} in either list at any time. 154531f4a6c1SNeilBrown */ 15461da177e4SLinus Torvalds expire_client(unconf); 15471da177e4SLinus Torvalds } 1548b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1549a55370a3SNeilBrown if (new == NULL) 15501da177e4SLinus Torvalds goto out; 15511da177e4SLinus Torvalds copy_clid(new, conf); 15521da177e4SLinus Torvalds } else if (!unconf) { 15531da177e4SLinus Torvalds /* 1554a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 1555a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1556a186e767SJ. Bruce Fields * confirmed. 15571da177e4SLinus Torvalds */ 1558b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1559a55370a3SNeilBrown if (new == NULL) 15601da177e4SLinus Torvalds goto out; 15611da177e4SLinus Torvalds gen_clid(new); 156249ba8781SJ. Bruce Fields } else { 15631da177e4SLinus Torvalds /* 1564a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 1565a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1566a186e767SJ. Bruce Fields * confirmed. 15671da177e4SLinus Torvalds */ 15681da177e4SLinus Torvalds expire_client(unconf); 1569b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1570a55370a3SNeilBrown if (new == NULL) 15711da177e4SLinus Torvalds goto out; 15721da177e4SLinus Torvalds gen_clid(new); 15731da177e4SLinus Torvalds } 1574fbf4665fSJeff Layton gen_callback(new, setclid, rpc_get_scope_id(sa)); 1575c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 15761da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 15771da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 15781da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 15791da177e4SLinus Torvalds status = nfs_ok; 15801da177e4SLinus Torvalds out: 15811da177e4SLinus Torvalds nfs4_unlock_state(); 15821da177e4SLinus Torvalds return status; 15831da177e4SLinus Torvalds } 15841da177e4SLinus Torvalds 15851da177e4SLinus Torvalds 15861da177e4SLinus Torvalds /* 1587a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 1588a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 1589a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 15901da177e4SLinus Torvalds */ 1591b37ad28bSAl Viro __be32 1592b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 1593b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 1594b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 15951da177e4SLinus Torvalds { 1596363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 159721ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 15981da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 15991da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 1600b37ad28bSAl Viro __be32 status; 16011da177e4SLinus Torvalds 16021da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 16031da177e4SLinus Torvalds return nfserr_stale_clientid; 16041da177e4SLinus Torvalds /* 16051da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 16061da177e4SLinus Torvalds * We get here on a DRC miss. 16071da177e4SLinus Torvalds */ 16081da177e4SLinus Torvalds 16091da177e4SLinus Torvalds nfs4_lock_state(); 161021ab45a4SNeilBrown 161121ab45a4SNeilBrown conf = find_confirmed_client(clid); 161221ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 161321ab45a4SNeilBrown 161422de4d83SNeilBrown status = nfserr_clid_inuse; 1615363168b4SJeff Layton if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) 16161da177e4SLinus Torvalds goto out; 1617363168b4SJeff Layton if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) 16181da177e4SLinus Torvalds goto out; 161921ab45a4SNeilBrown 1620a186e767SJ. Bruce Fields /* 1621a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 1622a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 1623a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 1624a186e767SJ. Bruce Fields */ 1625366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 1626a186e767SJ. Bruce Fields /* 1627a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 1628a186e767SJ. Bruce Fields * callback update 16297c79f737SNeilBrown */ 1630599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 16311da177e4SLinus Torvalds status = nfserr_clid_inuse; 16321da177e4SLinus Torvalds else { 16331a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 16341a69c179SNeilBrown * change request correctly. */ 1635c237dc03SJ. Bruce Fields atomic_set(&conf->cl_cb_conn.cb_set, 0); 16361a69c179SNeilBrown expire_client(unconf); 16371da177e4SLinus Torvalds status = nfs_ok; 16381a69c179SNeilBrown 16391da177e4SLinus Torvalds } 1640f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 1641a186e767SJ. Bruce Fields /* 1642a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 1643a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 1644a186e767SJ. Bruce Fields * do nothing. 16457c79f737SNeilBrown */ 1646599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 16471da177e4SLinus Torvalds status = nfserr_clid_inuse; 164821ab45a4SNeilBrown else 16491da177e4SLinus Torvalds status = nfs_ok; 16507c79f737SNeilBrown } else if (!conf && unconf 1651599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 1652a186e767SJ. Bruce Fields /* 1653a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 1654a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 16551da177e4SLinus Torvalds */ 1656599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 16571da177e4SLinus Torvalds status = nfserr_clid_inuse; 16581da177e4SLinus Torvalds } else { 16591a69c179SNeilBrown unsigned int hash = 16601a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 16611a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 1662a1bcecd2SAndy Adamson hash, false); 16631a69c179SNeilBrown if (conf) { 1664c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 16651a69c179SNeilBrown expire_client(conf); 16661a69c179SNeilBrown } 16671da177e4SLinus Torvalds move_to_confirmed(unconf); 166821ab45a4SNeilBrown conf = unconf; 166946f8a64bSJ. Bruce Fields nfsd4_probe_callback(conf); 16701a69c179SNeilBrown status = nfs_ok; 16711da177e4SLinus Torvalds } 1672599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 1673599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 16747c79f737SNeilBrown &confirm)))) { 1675a186e767SJ. Bruce Fields /* 1676a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 1677a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 16781da177e4SLinus Torvalds */ 16791da177e4SLinus Torvalds status = nfserr_stale_clientid; 16807c79f737SNeilBrown } else { 16811da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 168222de4d83SNeilBrown status = nfserr_clid_inuse; 168308e8987cSNeilBrown } 16841da177e4SLinus Torvalds out: 16851da177e4SLinus Torvalds nfs4_unlock_state(); 16861da177e4SLinus Torvalds return status; 16871da177e4SLinus Torvalds } 16881da177e4SLinus Torvalds 16891da177e4SLinus Torvalds /* OPEN Share state helper functions */ 16901da177e4SLinus Torvalds static inline struct nfs4_file * 16911da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 16921da177e4SLinus Torvalds { 16931da177e4SLinus Torvalds struct nfs4_file *fp; 16941da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 16951da177e4SLinus Torvalds 1696e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 1697e60d4398SNeilBrown if (fp) { 16988b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 16991da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 17008beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 17018beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 17028b671b80SJ. Bruce Fields spin_lock(&recall_lock); 17031da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 17048b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 17051da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 17061da177e4SLinus Torvalds fp->fi_id = current_fileid++; 170747f9940cSMeelap Shah fp->fi_had_conflict = false; 17081da177e4SLinus Torvalds return fp; 17091da177e4SLinus Torvalds } 17101da177e4SLinus Torvalds return NULL; 17111da177e4SLinus Torvalds } 17121da177e4SLinus Torvalds 17131da177e4SLinus Torvalds static void 1714e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 1715e60d4398SNeilBrown { 1716e60d4398SNeilBrown if (*slab == NULL) 1717e60d4398SNeilBrown return; 17181a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1719e60d4398SNeilBrown *slab = NULL; 1720e60d4398SNeilBrown } 1721e60d4398SNeilBrown 1722e8ff2a84SJ. Bruce Fields void 1723e60d4398SNeilBrown nfsd4_free_slabs(void) 1724e60d4398SNeilBrown { 1725e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1726e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 17275ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 17285b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1729e60d4398SNeilBrown } 17301da177e4SLinus Torvalds 17311da177e4SLinus Torvalds static int 17321da177e4SLinus Torvalds nfsd4_init_slabs(void) 17331da177e4SLinus Torvalds { 17341da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 173520c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 1736e60d4398SNeilBrown if (stateowner_slab == NULL) 1737e60d4398SNeilBrown goto out_nomem; 1738e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 173920c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 1740e60d4398SNeilBrown if (file_slab == NULL) 1741e60d4398SNeilBrown goto out_nomem; 17425ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 174320c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 17445ac049acSNeilBrown if (stateid_slab == NULL) 17455ac049acSNeilBrown goto out_nomem; 17465b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 174720c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 17485b2d21c1SNeilBrown if (deleg_slab == NULL) 17495b2d21c1SNeilBrown goto out_nomem; 1750e60d4398SNeilBrown return 0; 1751e60d4398SNeilBrown out_nomem: 1752e60d4398SNeilBrown nfsd4_free_slabs(); 17531da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 17541da177e4SLinus Torvalds return -ENOMEM; 17551da177e4SLinus Torvalds } 17561da177e4SLinus Torvalds 17571da177e4SLinus Torvalds void 17581da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 17591da177e4SLinus Torvalds { 17601da177e4SLinus Torvalds struct nfs4_stateowner *sop = 17611da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 17621da177e4SLinus Torvalds kfree(sop->so_owner.data); 17631da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 17641da177e4SLinus Torvalds } 17651da177e4SLinus Torvalds 17661da177e4SLinus Torvalds static inline struct nfs4_stateowner * 17671da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 17681da177e4SLinus Torvalds { 17691da177e4SLinus Torvalds struct nfs4_stateowner *sop; 17701da177e4SLinus Torvalds 17711da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 17721da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 17731da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 17741da177e4SLinus Torvalds sop->so_owner.len = owner->len; 17751da177e4SLinus Torvalds kref_init(&sop->so_ref); 17761da177e4SLinus Torvalds return sop; 17771da177e4SLinus Torvalds } 17781da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 17791da177e4SLinus Torvalds } 17801da177e4SLinus Torvalds return NULL; 17811da177e4SLinus Torvalds } 17821da177e4SLinus Torvalds 17831da177e4SLinus Torvalds static struct nfs4_stateowner * 17841da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 17851da177e4SLinus Torvalds struct nfs4_stateowner *sop; 17861da177e4SLinus Torvalds struct nfs4_replay *rp; 17871da177e4SLinus Torvalds unsigned int idhashval; 17881da177e4SLinus Torvalds 17891da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 17901da177e4SLinus Torvalds return NULL; 17911da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 17921da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 17931da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 17941da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1795ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1796ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 17971da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 17981da177e4SLinus Torvalds sop->so_time = 0; 17991da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 18001da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1801ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 18021da177e4SLinus Torvalds sop->so_is_open_owner = 1; 18031da177e4SLinus Torvalds sop->so_id = current_ownerid++; 18041da177e4SLinus Torvalds sop->so_client = clp; 18051da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 18061da177e4SLinus Torvalds sop->so_confirmed = 0; 18071da177e4SLinus Torvalds rp = &sop->so_replay; 1808de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 18091da177e4SLinus Torvalds rp->rp_buflen = 0; 18101da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 18111da177e4SLinus Torvalds return sop; 18121da177e4SLinus Torvalds } 18131da177e4SLinus Torvalds 18141da177e4SLinus Torvalds static inline void 18151da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 18161da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 18171da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1820ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1821ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 18221da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 18231da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1824ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 18258beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 18261da177e4SLinus Torvalds stp->st_stateowner = sop; 182713cd2184SNeilBrown get_nfs4_file(fp); 18281da177e4SLinus Torvalds stp->st_file = fp; 182978155ed7SBian Naimeng stp->st_stateid.si_boot = get_seconds(); 18301da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 18311da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 18321da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 18331da177e4SLinus Torvalds stp->st_access_bmap = 0; 18341da177e4SLinus Torvalds stp->st_deny_bmap = 0; 183584459a11SAndy Adamson __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, 183684459a11SAndy Adamson &stp->st_access_bmap); 18371da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 18384c4cd222SNeilBrown stp->st_openstp = NULL; 18391da177e4SLinus Torvalds } 18401da177e4SLinus Torvalds 18411da177e4SLinus Torvalds static void 18421da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 18431da177e4SLinus Torvalds { 18441da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 18451da177e4SLinus Torvalds 1846358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 18471da177e4SLinus Torvalds sop->so_time = get_seconds(); 18481da177e4SLinus Torvalds } 18491da177e4SLinus Torvalds 18501da177e4SLinus Torvalds static int 1851599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1852599e0a22SJ. Bruce Fields clientid_t *clid) 1853599e0a22SJ. Bruce Fields { 1854599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1855599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1856599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 18571da177e4SLinus Torvalds } 18581da177e4SLinus Torvalds 18591da177e4SLinus Torvalds static struct nfs4_stateowner * 18601da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 18611da177e4SLinus Torvalds { 18621da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 18631da177e4SLinus Torvalds 18641da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1865599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 18661da177e4SLinus Torvalds return so; 18671da177e4SLinus Torvalds } 18681da177e4SLinus Torvalds return NULL; 18691da177e4SLinus Torvalds } 18701da177e4SLinus Torvalds 18711da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 18721da177e4SLinus Torvalds static struct nfs4_file * 18731da177e4SLinus Torvalds find_file(struct inode *ino) 18741da177e4SLinus Torvalds { 18751da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 18761da177e4SLinus Torvalds struct nfs4_file *fp; 18771da177e4SLinus Torvalds 18788b671b80SJ. Bruce Fields spin_lock(&recall_lock); 18791da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 188013cd2184SNeilBrown if (fp->fi_inode == ino) { 188113cd2184SNeilBrown get_nfs4_file(fp); 18828b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 18831da177e4SLinus Torvalds return fp; 18841da177e4SLinus Torvalds } 188513cd2184SNeilBrown } 18868b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 18871da177e4SLinus Torvalds return NULL; 18881da177e4SLinus Torvalds } 18891da177e4SLinus Torvalds 1890d87a8adeSAndy Adamson static inline int access_valid(u32 x, u32 minorversion) 1891ba5a6a19SJ. Bruce Fields { 1892d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) 18938838dc43SJ. Bruce Fields return 0; 1894d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) 1895d87a8adeSAndy Adamson return 0; 1896d87a8adeSAndy Adamson x &= ~NFS4_SHARE_ACCESS_MASK; 1897d87a8adeSAndy Adamson if (minorversion && x) { 1898d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) 1899d87a8adeSAndy Adamson return 0; 1900d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) 1901d87a8adeSAndy Adamson return 0; 1902d87a8adeSAndy Adamson x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); 1903d87a8adeSAndy Adamson } 1904d87a8adeSAndy Adamson if (x) 19058838dc43SJ. Bruce Fields return 0; 19068838dc43SJ. Bruce Fields return 1; 1907ba5a6a19SJ. Bruce Fields } 1908ba5a6a19SJ. Bruce Fields 19098838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 1910ba5a6a19SJ. Bruce Fields { 19118838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 19128838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 1913ba5a6a19SJ. Bruce Fields } 19141da177e4SLinus Torvalds 19154f83aa30SJ. Bruce Fields /* 19164f83aa30SJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 19174f83aa30SJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 19184f83aa30SJ. Bruce Fields * only what share bits are currently in force, but also what 19194f83aa30SJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 19204f83aa30SJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 19214f83aa30SJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 19224f83aa30SJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 19234f83aa30SJ. Bruce Fields * 19244f83aa30SJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 19254f83aa30SJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 19264f83aa30SJ. Bruce Fields * 19274f83aa30SJ. Bruce Fields * OPEN allow read, deny write 19284f83aa30SJ. Bruce Fields * OPEN allow both, deny none 19294f83aa30SJ. Bruce Fields * DOWNGRADE allow read, deny none 19304f83aa30SJ. Bruce Fields * 19314f83aa30SJ. Bruce Fields * which we should reject. 19324f83aa30SJ. Bruce Fields */ 1933fd39ca9aSNeilBrown static void 19341da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 19351da177e4SLinus Torvalds int i; 19361da177e4SLinus Torvalds 19371da177e4SLinus Torvalds *access = 0; 19381da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 19391da177e4SLinus Torvalds if (test_bit(i, &bmap)) 19401da177e4SLinus Torvalds *access |= i; 19411da177e4SLinus Torvalds } 19421da177e4SLinus Torvalds } 19431da177e4SLinus Torvalds 1944fd39ca9aSNeilBrown static void 19451da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 19461da177e4SLinus Torvalds int i; 19471da177e4SLinus Torvalds 19481da177e4SLinus Torvalds *deny = 0; 19491da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 19501da177e4SLinus Torvalds if (test_bit(i, &bmap)) 19511da177e4SLinus Torvalds *deny |= i ; 19521da177e4SLinus Torvalds } 19531da177e4SLinus Torvalds } 19541da177e4SLinus Torvalds 19551da177e4SLinus Torvalds static int 19561da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 19571da177e4SLinus Torvalds unsigned int access, deny; 19581da177e4SLinus Torvalds 19591da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 19601da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 19611da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 19621da177e4SLinus Torvalds return 0; 19631da177e4SLinus Torvalds return 1; 19641da177e4SLinus Torvalds } 19651da177e4SLinus Torvalds 19661da177e4SLinus Torvalds /* 19671da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 19681da177e4SLinus Torvalds * WRITE with all zero or all one stateid 19691da177e4SLinus Torvalds */ 1970b37ad28bSAl Viro static __be32 19711da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 19721da177e4SLinus Torvalds { 19731da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 19741da177e4SLinus Torvalds struct nfs4_file *fp; 19751da177e4SLinus Torvalds struct nfs4_stateid *stp; 1976b37ad28bSAl Viro __be32 ret; 19771da177e4SLinus Torvalds 19781da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 19791da177e4SLinus Torvalds 19801da177e4SLinus Torvalds fp = find_file(ino); 198113cd2184SNeilBrown if (!fp) 198213cd2184SNeilBrown return nfs_ok; 1983b700949bSNeilBrown ret = nfserr_locked; 19841da177e4SLinus Torvalds /* Search for conflicting share reservations */ 19858beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 19861da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 19871da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 198813cd2184SNeilBrown goto out; 19891da177e4SLinus Torvalds } 199013cd2184SNeilBrown ret = nfs_ok; 199113cd2184SNeilBrown out: 199213cd2184SNeilBrown put_nfs4_file(fp); 199313cd2184SNeilBrown return ret; 19941da177e4SLinus Torvalds } 19951da177e4SLinus Torvalds 19961da177e4SLinus Torvalds static inline void 19971da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 19981da177e4SLinus Torvalds { 19991da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 2000aceaf78dSDave Hansen drop_file_write_access(filp); 20011da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 20021da177e4SLinus Torvalds } 20031da177e4SLinus Torvalds } 20041da177e4SLinus Torvalds 20051da177e4SLinus Torvalds /* 20061da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 20071da177e4SLinus Torvalds * by the lease (file_lock) 20081da177e4SLinus Torvalds * 20091da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 20101da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 20111da177e4SLinus Torvalds * lease. 20121da177e4SLinus Torvalds */ 20131da177e4SLinus Torvalds static 20141da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 20151da177e4SLinus Torvalds { 20161da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 20171da177e4SLinus Torvalds 20181da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 20191da177e4SLinus Torvalds if (!dp) 20201da177e4SLinus Torvalds return; 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 20231da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 20241da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 20251da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 20261da177e4SLinus Torvalds * it's safe to take a reference: */ 20271da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 2028cfdcad4dSJ. Bruce Fields atomic_inc(&dp->dl_client->cl_count); 20291da177e4SLinus Torvalds 20301da177e4SLinus Torvalds spin_lock(&recall_lock); 20311da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 20321da177e4SLinus Torvalds spin_unlock(&recall_lock); 20331da177e4SLinus Torvalds 20341da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 20351da177e4SLinus Torvalds dp->dl_time = get_seconds(); 20361da177e4SLinus Torvalds 20370272e1fdSJ. Bruce Fields /* 20380272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 20390272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 20400272e1fdSJ. Bruce Fields * in time. 20410272e1fdSJ. Bruce Fields */ 20420272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 20431da177e4SLinus Torvalds 204463e4863fSJ. Bruce Fields dp->dl_file->fi_had_conflict = true; 204563e4863fSJ. Bruce Fields nfsd4_cb_recall(dp); 20461da177e4SLinus Torvalds } 20471da177e4SLinus Torvalds 20481da177e4SLinus Torvalds /* 20491da177e4SLinus Torvalds * The file_lock is being reapd. 20501da177e4SLinus Torvalds * 20511da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 20521da177e4SLinus Torvalds */ 20531da177e4SLinus Torvalds static 20541da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 20551da177e4SLinus Torvalds { 20561da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 20571da177e4SLinus Torvalds 20581da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 20591da177e4SLinus Torvalds 20601da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 20611da177e4SLinus Torvalds return; 20621da177e4SLinus Torvalds dp->dl_flock = NULL; 20631da177e4SLinus Torvalds } 20641da177e4SLinus Torvalds 20651da177e4SLinus Torvalds /* 20661da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 20671da177e4SLinus Torvalds * 2068a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 20691da177e4SLinus Torvalds */ 20701da177e4SLinus Torvalds static 20711da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 20721da177e4SLinus Torvalds { 20731da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 20741da177e4SLinus Torvalds 20751da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 20761da177e4SLinus Torvalds if (!dp) 20771da177e4SLinus Torvalds return; 20781da177e4SLinus Torvalds dp->dl_flock = new; 20791da177e4SLinus Torvalds } 20801da177e4SLinus Torvalds 20811da177e4SLinus Torvalds /* 2082a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 20831da177e4SLinus Torvalds */ 20841da177e4SLinus Torvalds static 20851da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 20861da177e4SLinus Torvalds { 20871da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 20881da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 20891da177e4SLinus Torvalds struct nfs4_delegation *tryd = 20901da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 20911da177e4SLinus Torvalds 20921da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 20931da177e4SLinus Torvalds return 0; 20941da177e4SLinus Torvalds 20951da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 20961da177e4SLinus Torvalds } 20971da177e4SLinus Torvalds 20981da177e4SLinus Torvalds 20991da177e4SLinus Torvalds static 21001da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 21011da177e4SLinus Torvalds { 21021da177e4SLinus Torvalds if (arg & F_UNLCK) 21031da177e4SLinus Torvalds return lease_modify(onlist, arg); 21041da177e4SLinus Torvalds else 21051da177e4SLinus Torvalds return -EAGAIN; 21061da177e4SLinus Torvalds } 21071da177e4SLinus Torvalds 21087b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 21091da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 21101da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 21111da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 21121da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 21131da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 21141da177e4SLinus Torvalds }; 21151da177e4SLinus Torvalds 21161da177e4SLinus Torvalds 2117b37ad28bSAl Viro __be32 21186668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 21196668958fSAndy Adamson struct nfsd4_open *open) 21201da177e4SLinus Torvalds { 21211da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 21221da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 21231da177e4SLinus Torvalds unsigned int strhashval; 21241da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 21251da177e4SLinus Torvalds 21261da177e4SLinus Torvalds if (!check_name(open->op_owner)) 21270f442aa2SJ. Bruce Fields return nfserr_inval; 21281da177e4SLinus Torvalds 21291da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 21301da177e4SLinus Torvalds return nfserr_stale_clientid; 21311da177e4SLinus Torvalds 21321da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 21331da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 21341da177e4SLinus Torvalds open->op_stateowner = sop; 21350f442aa2SJ. Bruce Fields if (!sop) { 21360f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 21370f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 21380f442aa2SJ. Bruce Fields if (clp == NULL) 21390f442aa2SJ. Bruce Fields return nfserr_expired; 21400f442aa2SJ. Bruce Fields goto renew; 21410f442aa2SJ. Bruce Fields } 21426668958fSAndy Adamson /* When sessions are used, skip open sequenceid processing */ 21436668958fSAndy Adamson if (nfsd4_has_session(cstate)) 21446668958fSAndy Adamson goto renew; 2145ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 21460f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2147ae8b6253SJ. Bruce Fields clp = sop->so_client; 2148f044ff83SJ. Bruce Fields release_openowner(sop); 21490f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 2150ae8b6253SJ. Bruce Fields goto renew; 21510f442aa2SJ. Bruce Fields } 21520f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 21531da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 2154a90b061cSAl Viro return nfserr_replay_me; 21551da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 21561da177e4SLinus Torvalds * that we don't even have replay data saved! 21571da177e4SLinus Torvalds * Therefore, we have no choice but to continue 21581da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 21591da177e4SLinus Torvalds * fail again for the same reason. 21601da177e4SLinus Torvalds */ 21610f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 21621da177e4SLinus Torvalds goto renew; 21631da177e4SLinus Torvalds } 21640f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 21650f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 21660f442aa2SJ. Bruce Fields renew: 21670f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 21681da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 21691da177e4SLinus Torvalds if (sop == NULL) 21700f442aa2SJ. Bruce Fields return nfserr_resource; 21711da177e4SLinus Torvalds open->op_stateowner = sop; 21720f442aa2SJ. Bruce Fields } 21730f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 21741da177e4SLinus Torvalds renew_client(sop->so_client); 21750f442aa2SJ. Bruce Fields return nfs_ok; 21761da177e4SLinus Torvalds } 21771da177e4SLinus Torvalds 2178b37ad28bSAl Viro static inline __be32 21794a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 21804a6e43e6SNeilBrown { 21814a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 21824a6e43e6SNeilBrown return nfserr_openmode; 21834a6e43e6SNeilBrown else 21844a6e43e6SNeilBrown return nfs_ok; 21854a6e43e6SNeilBrown } 21864a6e43e6SNeilBrown 218752f4fb43SNeilBrown static struct nfs4_delegation * 218852f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 218952f4fb43SNeilBrown { 219052f4fb43SNeilBrown struct nfs4_delegation *dp; 219152f4fb43SNeilBrown 2192ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 219352f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 219452f4fb43SNeilBrown return dp; 219552f4fb43SNeilBrown } 219652f4fb43SNeilBrown return NULL; 219752f4fb43SNeilBrown } 219852f4fb43SNeilBrown 2199b37ad28bSAl Viro static __be32 2200567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2201567d9829SNeilBrown struct nfs4_delegation **dp) 2202567d9829SNeilBrown { 2203567d9829SNeilBrown int flags; 2204b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2205567d9829SNeilBrown 2206567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2207567d9829SNeilBrown if (*dp == NULL) 2208c44c5eebSNeilBrown goto out; 2209567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 2210567d9829SNeilBrown RD_STATE : WR_STATE; 2211567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2212567d9829SNeilBrown if (status) 2213567d9829SNeilBrown *dp = NULL; 2214c44c5eebSNeilBrown out: 2215c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2216c44c5eebSNeilBrown return nfs_ok; 2217c44c5eebSNeilBrown if (status) 2218c44c5eebSNeilBrown return status; 2219c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 2220c44c5eebSNeilBrown return nfs_ok; 2221567d9829SNeilBrown } 2222567d9829SNeilBrown 2223b37ad28bSAl Viro static __be32 22241da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 22251da177e4SLinus Torvalds { 22261da177e4SLinus Torvalds struct nfs4_stateid *local; 2227b37ad28bSAl Viro __be32 status = nfserr_share_denied; 22281da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 22291da177e4SLinus Torvalds 22308beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 22311da177e4SLinus Torvalds /* ignore lock owners */ 22321da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 22331da177e4SLinus Torvalds continue; 22341da177e4SLinus Torvalds /* remember if we have seen this open owner */ 22351da177e4SLinus Torvalds if (local->st_stateowner == sop) 22361da177e4SLinus Torvalds *stpp = local; 22371da177e4SLinus Torvalds /* check for conflicting share reservations */ 22381da177e4SLinus Torvalds if (!test_share(local, open)) 22391da177e4SLinus Torvalds goto out; 22401da177e4SLinus Torvalds } 22411da177e4SLinus Torvalds status = 0; 22421da177e4SLinus Torvalds out: 22431da177e4SLinus Torvalds return status; 22441da177e4SLinus Torvalds } 22451da177e4SLinus Torvalds 22465ac049acSNeilBrown static inline struct nfs4_stateid * 22475ac049acSNeilBrown nfs4_alloc_stateid(void) 22485ac049acSNeilBrown { 22495ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 22505ac049acSNeilBrown } 22515ac049acSNeilBrown 2252b37ad28bSAl Viro static __be32 22531da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2254567d9829SNeilBrown struct nfs4_delegation *dp, 22551da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 22561da177e4SLinus Torvalds { 22571da177e4SLinus Torvalds struct nfs4_stateid *stp; 22581da177e4SLinus Torvalds 22595ac049acSNeilBrown stp = nfs4_alloc_stateid(); 22601da177e4SLinus Torvalds if (stp == NULL) 22611da177e4SLinus Torvalds return nfserr_resource; 22621da177e4SLinus Torvalds 2263567d9829SNeilBrown if (dp) { 2264567d9829SNeilBrown get_file(dp->dl_vfs_file); 2265567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 2266567d9829SNeilBrown } else { 2267b37ad28bSAl Viro __be32 status; 2268567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 2269567d9829SNeilBrown &stp->st_vfs_file); 22701da177e4SLinus Torvalds if (status) { 22711da177e4SLinus Torvalds if (status == nfserr_dropit) 22721da177e4SLinus Torvalds status = nfserr_jukebox; 22735ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 22741da177e4SLinus Torvalds return status; 22751da177e4SLinus Torvalds } 2276567d9829SNeilBrown } 22771da177e4SLinus Torvalds *stpp = stp; 22781da177e4SLinus Torvalds return 0; 22791da177e4SLinus Torvalds } 22801da177e4SLinus Torvalds 2281b37ad28bSAl Viro static inline __be32 22821da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 22831da177e4SLinus Torvalds struct nfsd4_open *open) 22841da177e4SLinus Torvalds { 22851da177e4SLinus Torvalds struct iattr iattr = { 22861da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 22871da177e4SLinus Torvalds .ia_size = 0, 22881da177e4SLinus Torvalds }; 22891da177e4SLinus Torvalds if (!open->op_truncate) 22901da177e4SLinus Torvalds return 0; 22911da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 22929246585aSAl Viro return nfserr_inval; 22931da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 22941da177e4SLinus Torvalds } 22951da177e4SLinus Torvalds 2296b37ad28bSAl Viro static __be32 22971da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 22981da177e4SLinus Torvalds { 22991da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 23007eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 23016c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 2302b37ad28bSAl Viro __be32 status; 23031da177e4SLinus Torvalds 23041da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23056c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 23066c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 23071da177e4SLinus Torvalds 23086c26d08fSJ. Bruce Fields if (new_writer) { 2309b37ad28bSAl Viro int err = get_write_access(inode); 2310b37ad28bSAl Viro if (err) 2311b37ad28bSAl Viro return nfserrno(err); 2312e518f056SBenny Halevy err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); 2313e518f056SBenny Halevy if (err) 2314e518f056SBenny Halevy return nfserrno(err); 2315e518f056SBenny Halevy file_take_write(filp); 23166c26d08fSJ. Bruce Fields } 23171da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 23181da177e4SLinus Torvalds if (status) { 23196c26d08fSJ. Bruce Fields if (new_writer) 23201da177e4SLinus Torvalds put_write_access(inode); 23211da177e4SLinus Torvalds return status; 23221da177e4SLinus Torvalds } 23231da177e4SLinus Torvalds /* remember the open */ 23246c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 2325b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 2326b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 23271da177e4SLinus Torvalds 23281da177e4SLinus Torvalds return nfs_ok; 23291da177e4SLinus Torvalds } 23301da177e4SLinus Torvalds 23311da177e4SLinus Torvalds 23321da177e4SLinus Torvalds static void 233337515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 23341da177e4SLinus Torvalds { 23351da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 2336c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 23371da177e4SLinus Torvalds } 23381da177e4SLinus Torvalds 23391da177e4SLinus Torvalds /* 23401da177e4SLinus Torvalds * Attempt to hand out a delegation. 23411da177e4SLinus Torvalds */ 23421da177e4SLinus Torvalds static void 23431da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 23441da177e4SLinus Torvalds { 23451da177e4SLinus Torvalds struct nfs4_delegation *dp; 23461da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 2347c237dc03SJ. Bruce Fields struct nfs4_cb_conn *cb = &sop->so_client->cl_cb_conn; 23481da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 23491da177e4SLinus Torvalds int status, flag = 0; 23501da177e4SLinus Torvalds 23511da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 23527b190fecSNeilBrown open->op_recall = 0; 23537b190fecSNeilBrown switch (open->op_claim_type) { 23547b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 23557b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 23567b190fecSNeilBrown open->op_recall = 1; 23577b190fecSNeilBrown flag = open->op_delegate_type; 23587b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 23591da177e4SLinus Torvalds goto out; 23607b190fecSNeilBrown break; 23617b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 23627b190fecSNeilBrown /* Let's not give out any delegations till everyone's 23637b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2364af558e33SJ. Bruce Fields if (locks_in_grace()) 23657b190fecSNeilBrown goto out; 23667b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 23677b190fecSNeilBrown goto out; 23681da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 23691da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 23701da177e4SLinus Torvalds else 23711da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 23727b190fecSNeilBrown break; 23737b190fecSNeilBrown default: 23747b190fecSNeilBrown goto out; 23757b190fecSNeilBrown } 23761da177e4SLinus Torvalds 23771da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 23781da177e4SLinus Torvalds if (dp == NULL) { 23791da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 23801da177e4SLinus Torvalds goto out; 23811da177e4SLinus Torvalds } 23821da177e4SLinus Torvalds locks_init_lock(&fl); 23831da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 23841da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 23859167f501SFelix Blyakher fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 23861da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 23871da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 23881da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 23891da177e4SLinus Torvalds fl.fl_pid = current->tgid; 23901da177e4SLinus Torvalds 2391a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 23921da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 23931da177e4SLinus Torvalds */ 23949167f501SFelix Blyakher if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { 23951da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 2396c907132dSNeilBrown unhash_delegation(dp); 23971da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 23981da177e4SLinus Torvalds goto out; 23991da177e4SLinus Torvalds } 24001da177e4SLinus Torvalds 24011da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 24021da177e4SLinus Torvalds 24038c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 24048c10cbdbSBenny Halevy STATEID_VAL(&dp->dl_stateid)); 24051da177e4SLinus Torvalds out: 24067b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 24077b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 24087b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 24092fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 24101da177e4SLinus Torvalds open->op_delegate_type = flag; 24111da177e4SLinus Torvalds } 24121da177e4SLinus Torvalds 24131da177e4SLinus Torvalds /* 24141da177e4SLinus Torvalds * called with nfs4_lock_state() held. 24151da177e4SLinus Torvalds */ 2416b37ad28bSAl Viro __be32 24171da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 24181da177e4SLinus Torvalds { 24196668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 24201da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 24211da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 24221da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2423567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2424b37ad28bSAl Viro __be32 status; 24251da177e4SLinus Torvalds 24261da177e4SLinus Torvalds status = nfserr_inval; 2427d87a8adeSAndy Adamson if (!access_valid(open->op_share_access, resp->cstate.minorversion) 2428ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 24291da177e4SLinus Torvalds goto out; 24301da177e4SLinus Torvalds /* 24311da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 24321da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 24331da177e4SLinus Torvalds * If not found, create the nfs4_file struct 24341da177e4SLinus Torvalds */ 24351da177e4SLinus Torvalds fp = find_file(ino); 24361da177e4SLinus Torvalds if (fp) { 24371da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 24381da177e4SLinus Torvalds goto out; 2439c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2440c44c5eebSNeilBrown if (status) 2441c44c5eebSNeilBrown goto out; 24421da177e4SLinus Torvalds } else { 2443c44c5eebSNeilBrown status = nfserr_bad_stateid; 2444c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2445c44c5eebSNeilBrown goto out; 24461da177e4SLinus Torvalds status = nfserr_resource; 24471da177e4SLinus Torvalds fp = alloc_init_file(ino); 24481da177e4SLinus Torvalds if (fp == NULL) 24491da177e4SLinus Torvalds goto out; 24501da177e4SLinus Torvalds } 24511da177e4SLinus Torvalds 24521da177e4SLinus Torvalds /* 24531da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 24541da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 24551da177e4SLinus Torvalds */ 24561da177e4SLinus Torvalds if (stp) { 24571da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 24581da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 24591da177e4SLinus Torvalds if (status) 24601da177e4SLinus Torvalds goto out; 2461444c2c07SNeilBrown update_stateid(&stp->st_stateid); 24621da177e4SLinus Torvalds } else { 24631da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 24641da177e4SLinus Torvalds int flags = 0; 24659ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 24668837abcaSMiklos Szeredi flags |= NFSD_MAY_READ; 24671da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 24688837abcaSMiklos Szeredi flags |= NFSD_MAY_WRITE; 2469567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 2470567d9829SNeilBrown if (status) 24711da177e4SLinus Torvalds goto out; 24721da177e4SLinus Torvalds init_stateid(stp, fp, open); 24731da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 24741da177e4SLinus Torvalds if (status) { 24752283963fSJ. Bruce Fields release_open_stateid(stp); 24761da177e4SLinus Torvalds goto out; 24771da177e4SLinus Torvalds } 24786668958fSAndy Adamson if (nfsd4_has_session(&resp->cstate)) 24796668958fSAndy Adamson update_stateid(&stp->st_stateid); 24801da177e4SLinus Torvalds } 24811da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 24821da177e4SLinus Torvalds 2483*8b8aae40SRicardo Labiaga if (nfsd4_has_session(&resp->cstate)) { 24846668958fSAndy Adamson open->op_stateowner->so_confirmed = 1; 2485*8b8aae40SRicardo Labiaga nfsd4_create_clid_dir(open->op_stateowner->so_client); 2486*8b8aae40SRicardo Labiaga } 24876668958fSAndy Adamson 24881da177e4SLinus Torvalds /* 24891da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 24901da177e4SLinus Torvalds * OPEN succeeds even if we fail. 24911da177e4SLinus Torvalds */ 24921da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 24931da177e4SLinus Torvalds 24941da177e4SLinus Torvalds status = nfs_ok; 24951da177e4SLinus Torvalds 24968c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 24978c10cbdbSBenny Halevy STATEID_VAL(&stp->st_stateid)); 24981da177e4SLinus Torvalds out: 249913cd2184SNeilBrown if (fp) 250013cd2184SNeilBrown put_nfs4_file(fp); 250137515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 250237515177SNeilBrown nfs4_set_claim_prev(open); 25031da177e4SLinus Torvalds /* 25041da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 25051da177e4SLinus Torvalds */ 25061da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 25076668958fSAndy Adamson if (!open->op_stateowner->so_confirmed && 25086668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 25091da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 25101da177e4SLinus Torvalds 25111da177e4SLinus Torvalds return status; 25121da177e4SLinus Torvalds } 25131da177e4SLinus Torvalds 2514b37ad28bSAl Viro __be32 2515b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2516b591480bSJ.Bruce Fields clientid_t *clid) 25171da177e4SLinus Torvalds { 25181da177e4SLinus Torvalds struct nfs4_client *clp; 2519b37ad28bSAl Viro __be32 status; 25201da177e4SLinus Torvalds 25211da177e4SLinus Torvalds nfs4_lock_state(); 25221da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 25231da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 25241da177e4SLinus Torvalds status = nfserr_stale_clientid; 25251da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 25261da177e4SLinus Torvalds goto out; 25271da177e4SLinus Torvalds clp = find_confirmed_client(clid); 25281da177e4SLinus Torvalds status = nfserr_expired; 25291da177e4SLinus Torvalds if (clp == NULL) { 25301da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 25311da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 25321da177e4SLinus Torvalds goto out; 25331da177e4SLinus Torvalds } 25341da177e4SLinus Torvalds renew_client(clp); 25351da177e4SLinus Torvalds status = nfserr_cb_path_down; 2536ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 2537c237dc03SJ. Bruce Fields && !atomic_read(&clp->cl_cb_conn.cb_set)) 25381da177e4SLinus Torvalds goto out; 25391da177e4SLinus Torvalds status = nfs_ok; 25401da177e4SLinus Torvalds out: 25411da177e4SLinus Torvalds nfs4_unlock_state(); 25421da177e4SLinus Torvalds return status; 25431da177e4SLinus Torvalds } 25441da177e4SLinus Torvalds 2545af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 2546af558e33SJ. Bruce Fields }; 2547af558e33SJ. Bruce Fields 2548a76b4319SNeilBrown static void 2549af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2550a76b4319SNeilBrown { 2551a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2552c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2553af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2554a76b4319SNeilBrown } 2555a76b4319SNeilBrown 2556fd39ca9aSNeilBrown static time_t 25571da177e4SLinus Torvalds nfs4_laundromat(void) 25581da177e4SLinus Torvalds { 25591da177e4SLinus Torvalds struct nfs4_client *clp; 25601da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25611da177e4SLinus Torvalds struct nfs4_delegation *dp; 25621da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 25631da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 25641da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 25651da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 25661da177e4SLinus Torvalds 25671da177e4SLinus Torvalds nfs4_lock_state(); 25681da177e4SLinus Torvalds 25691da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 2570af558e33SJ. Bruce Fields if (locks_in_grace()) 2571af558e33SJ. Bruce Fields nfsd4_end_grace(); 25721da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 25731da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 25741da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 25751da177e4SLinus Torvalds t = clp->cl_time - cutoff; 25761da177e4SLinus Torvalds if (clientid_val > t) 25771da177e4SLinus Torvalds clientid_val = t; 25781da177e4SLinus Torvalds break; 25791da177e4SLinus Torvalds } 25801da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 25811da177e4SLinus Torvalds clp->cl_clientid.cl_id); 2582c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 25831da177e4SLinus Torvalds expire_client(clp); 25841da177e4SLinus Torvalds } 25851da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 25861da177e4SLinus Torvalds spin_lock(&recall_lock); 25871da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 25881da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 25891da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 25901da177e4SLinus Torvalds u = dp->dl_time - cutoff; 25911da177e4SLinus Torvalds if (test_val > u) 25921da177e4SLinus Torvalds test_val = u; 25931da177e4SLinus Torvalds break; 25941da177e4SLinus Torvalds } 25951da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 25961da177e4SLinus Torvalds dp, dp->dl_flock); 25971da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 25981da177e4SLinus Torvalds } 25991da177e4SLinus Torvalds spin_unlock(&recall_lock); 26001da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 26011da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 26021da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 26031da177e4SLinus Torvalds unhash_delegation(dp); 26041da177e4SLinus Torvalds } 26051da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 26061da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 26071da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 26081da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 26091da177e4SLinus Torvalds u = sop->so_time - cutoff; 26101da177e4SLinus Torvalds if (test_val > u) 26111da177e4SLinus Torvalds test_val = u; 26121da177e4SLinus Torvalds break; 26131da177e4SLinus Torvalds } 26141da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 26151da177e4SLinus Torvalds sop->so_id); 2616f044ff83SJ. Bruce Fields release_openowner(sop); 26171da177e4SLinus Torvalds } 26181da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 26191da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 26201da177e4SLinus Torvalds nfs4_unlock_state(); 26211da177e4SLinus Torvalds return clientid_val; 26221da177e4SLinus Torvalds } 26231da177e4SLinus Torvalds 2624a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 2625a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 2626a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 2627a254b246SHarvey Harrison 2628a254b246SHarvey Harrison static void 2629c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 26301da177e4SLinus Torvalds { 26311da177e4SLinus Torvalds time_t t; 26321da177e4SLinus Torvalds 26331da177e4SLinus Torvalds t = nfs4_laundromat(); 26341da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 263558da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 26361da177e4SLinus Torvalds } 26371da177e4SLinus Torvalds 2638fd39ca9aSNeilBrown static struct nfs4_stateowner * 2639f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 2640f8816512SNeilBrown { 26411da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 26421da177e4SLinus Torvalds 26431da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 26441da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 26451da177e4SLinus Torvalds if (local->so_id == st_id) 26461da177e4SLinus Torvalds return local; 26471da177e4SLinus Torvalds } 26481da177e4SLinus Torvalds } 26491da177e4SLinus Torvalds return NULL; 26501da177e4SLinus Torvalds } 26511da177e4SLinus Torvalds 26521da177e4SLinus Torvalds static inline int 26531da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 26541da177e4SLinus Torvalds { 26557eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 26561da177e4SLinus Torvalds } 26571da177e4SLinus Torvalds 26581da177e4SLinus Torvalds static int 26591da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 26601da177e4SLinus Torvalds { 266178155ed7SBian Naimeng if (time_after((unsigned long)boot_time, 266278155ed7SBian Naimeng (unsigned long)stateid->si_boot)) { 26638c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 26648c10cbdbSBenny Halevy STATEID_VAL(stateid)); 26651da177e4SLinus Torvalds return 1; 26661da177e4SLinus Torvalds } 266778155ed7SBian Naimeng return 0; 266878155ed7SBian Naimeng } 266978155ed7SBian Naimeng 267078155ed7SBian Naimeng static int 267178155ed7SBian Naimeng EXPIRED_STATEID(stateid_t *stateid) 267278155ed7SBian Naimeng { 267378155ed7SBian Naimeng if (time_before((unsigned long)boot_time, 267478155ed7SBian Naimeng ((unsigned long)stateid->si_boot)) && 2675b8fd47aeSJ. Bruce Fields time_before((unsigned long)(stateid->si_boot + lease_time), get_seconds())) { 26768c10cbdbSBenny Halevy dprintk("NFSD: expired stateid " STATEID_FMT "!\n", 26778c10cbdbSBenny Halevy STATEID_VAL(stateid)); 267878155ed7SBian Naimeng return 1; 267978155ed7SBian Naimeng } 268078155ed7SBian Naimeng return 0; 268178155ed7SBian Naimeng } 268278155ed7SBian Naimeng 268378155ed7SBian Naimeng static __be32 268478155ed7SBian Naimeng stateid_error_map(stateid_t *stateid) 268578155ed7SBian Naimeng { 268678155ed7SBian Naimeng if (STALE_STATEID(stateid)) 268778155ed7SBian Naimeng return nfserr_stale_stateid; 268878155ed7SBian Naimeng if (EXPIRED_STATEID(stateid)) 268978155ed7SBian Naimeng return nfserr_expired; 269078155ed7SBian Naimeng 26918c10cbdbSBenny Halevy dprintk("NFSD: bad stateid " STATEID_FMT "!\n", 26928c10cbdbSBenny Halevy STATEID_VAL(stateid)); 269378155ed7SBian Naimeng return nfserr_bad_stateid; 269478155ed7SBian Naimeng } 26951da177e4SLinus Torvalds 26961da177e4SLinus Torvalds static inline int 26971da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 26981da177e4SLinus Torvalds { 26991da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 27001da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 27011da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 27021da177e4SLinus Torvalds } 27031da177e4SLinus Torvalds 27041da177e4SLinus Torvalds static inline int 27051da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 27061da177e4SLinus Torvalds { 27071da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 27081da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 27091da177e4SLinus Torvalds } 27101da177e4SLinus Torvalds 27111da177e4SLinus Torvalds static 2712b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 27131da177e4SLinus Torvalds { 2714b37ad28bSAl Viro __be32 status = nfserr_openmode; 27151da177e4SLinus Torvalds 27161da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 27171da177e4SLinus Torvalds goto out; 27181da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 27191da177e4SLinus Torvalds goto out; 27201da177e4SLinus Torvalds status = nfs_ok; 27211da177e4SLinus Torvalds out: 27221da177e4SLinus Torvalds return status; 27231da177e4SLinus Torvalds } 27241da177e4SLinus Torvalds 2725b37ad28bSAl Viro static inline __be32 27261da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 27271da177e4SLinus Torvalds { 2728203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 27291da177e4SLinus Torvalds return nfs_ok; 2730af558e33SJ. Bruce Fields else if (locks_in_grace()) { 27311da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 27321da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 27331da177e4SLinus Torvalds return nfserr_grace; 27341da177e4SLinus Torvalds } else if (flags & WR_STATE) 27351da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 27361da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 27371da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 27381da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 27391da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 27401da177e4SLinus Torvalds } 27411da177e4SLinus Torvalds 27421da177e4SLinus Torvalds /* 27431da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 27441da177e4SLinus Torvalds * that are not able to provide mandatory locking. 27451da177e4SLinus Torvalds */ 27461da177e4SLinus Torvalds static inline int 274718f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 27481da177e4SLinus Torvalds { 2749203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 27501da177e4SLinus Torvalds } 27511da177e4SLinus Torvalds 27526668958fSAndy Adamson static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) 27530836f587SJ. Bruce Fields { 27546668958fSAndy Adamson /* 27556668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 27566668958fSAndy Adamson * when it is zero. 27576668958fSAndy Adamson */ 27586668958fSAndy Adamson if ((flags & HAS_SESSION) && in->si_generation == 0) 27596668958fSAndy Adamson goto out; 27606668958fSAndy Adamson 27610836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 27620836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 27630836f587SJ. Bruce Fields return nfserr_bad_stateid; 27640836f587SJ. Bruce Fields /* 27650836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 27660836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 27670836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 27680836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 27690836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 27700836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 27710836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 27720836f587SJ. Bruce Fields * will just have to retry the IO: 27730836f587SJ. Bruce Fields */ 27740836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 27750836f587SJ. Bruce Fields return nfserr_old_stateid; 27766668958fSAndy Adamson out: 27770836f587SJ. Bruce Fields return nfs_ok; 27780836f587SJ. Bruce Fields } 27790836f587SJ. Bruce Fields 27803e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 27813e633079SJ. Bruce Fields { 27823e633079SJ. Bruce Fields return stateid->si_fileid == 0; 27833e633079SJ. Bruce Fields } 27843e633079SJ. Bruce Fields 27851da177e4SLinus Torvalds /* 27861da177e4SLinus Torvalds * Checks for stateid operations 27871da177e4SLinus Torvalds */ 2788b37ad28bSAl Viro __be32 2789dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 2790dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 27911da177e4SLinus Torvalds { 27921da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 27931da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 2794dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 27951da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2796b37ad28bSAl Viro __be32 status; 27971da177e4SLinus Torvalds 27981da177e4SLinus Torvalds if (filpp) 27991da177e4SLinus Torvalds *filpp = NULL; 28001da177e4SLinus Torvalds 280118f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 28021da177e4SLinus Torvalds return nfserr_grace; 28031da177e4SLinus Torvalds 28046668958fSAndy Adamson if (nfsd4_has_session(cstate)) 28056668958fSAndy Adamson flags |= HAS_SESSION; 28066668958fSAndy Adamson 28071da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 28081da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 28091da177e4SLinus Torvalds 28101da177e4SLinus Torvalds status = nfserr_stale_stateid; 28111da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 28121da177e4SLinus Torvalds goto out; 28131da177e4SLinus Torvalds 28141da177e4SLinus Torvalds status = nfserr_bad_stateid; 28153e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 2816a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 281778155ed7SBian Naimeng if (!dp) { 281878155ed7SBian Naimeng status = stateid_error_map(stateid); 28191da177e4SLinus Torvalds goto out; 282078155ed7SBian Naimeng } 28216668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, 28226668958fSAndy Adamson flags); 28230c2a498fSJ. Bruce Fields if (status) 28240c2a498fSJ. Bruce Fields goto out; 2825dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 2826dc9bf700SJ. Bruce Fields if (status) 2827dc9bf700SJ. Bruce Fields goto out; 2828dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 2829dc9bf700SJ. Bruce Fields if (filpp) 2830dc9bf700SJ. Bruce Fields *filpp = dp->dl_vfs_file; 28311da177e4SLinus Torvalds } else { /* open or lock stateid */ 2832a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 283378155ed7SBian Naimeng if (!stp) { 283478155ed7SBian Naimeng status = stateid_error_map(stateid); 28351da177e4SLinus Torvalds goto out; 283678155ed7SBian Naimeng } 28376150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 28381da177e4SLinus Torvalds goto out; 28391da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 28401da177e4SLinus Torvalds goto out; 28416668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, 28426668958fSAndy Adamson flags); 28430836f587SJ. Bruce Fields if (status) 28441da177e4SLinus Torvalds goto out; 2845a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 2846a4455be0SJ. Bruce Fields if (status) 28471da177e4SLinus Torvalds goto out; 28481da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 28491da177e4SLinus Torvalds if (filpp) 28501da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 28511da177e4SLinus Torvalds } 28521da177e4SLinus Torvalds status = nfs_ok; 28531da177e4SLinus Torvalds out: 28541da177e4SLinus Torvalds return status; 28551da177e4SLinus Torvalds } 28561da177e4SLinus Torvalds 28574c4cd222SNeilBrown static inline int 28584c4cd222SNeilBrown setlkflg (int type) 28594c4cd222SNeilBrown { 28604c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 28614c4cd222SNeilBrown RD_STATE : WR_STATE; 28624c4cd222SNeilBrown } 28631da177e4SLinus Torvalds 28641da177e4SLinus Torvalds /* 28651da177e4SLinus Torvalds * Checks for sequence id mutating operations. 28661da177e4SLinus Torvalds */ 2867b37ad28bSAl Viro static __be32 2868dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 2869dd453dfdSBenny Halevy stateid_t *stateid, int flags, 2870dd453dfdSBenny Halevy struct nfs4_stateowner **sopp, 2871dd453dfdSBenny Halevy struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 28721da177e4SLinus Torvalds { 28731da177e4SLinus Torvalds struct nfs4_stateid *stp; 28741da177e4SLinus Torvalds struct nfs4_stateowner *sop; 2875dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 28760836f587SJ. Bruce Fields __be32 status; 28771da177e4SLinus Torvalds 28788c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 28798c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 28801da177e4SLinus Torvalds 28811da177e4SLinus Torvalds *stpp = NULL; 28821da177e4SLinus Torvalds *sopp = NULL; 28831da177e4SLinus Torvalds 28841da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 28852fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 28863a4f98bbSNeilBrown return nfserr_bad_stateid; 28871da177e4SLinus Torvalds } 28881da177e4SLinus Torvalds 28891da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 28903a4f98bbSNeilBrown return nfserr_stale_stateid; 28916668958fSAndy Adamson 28926668958fSAndy Adamson if (nfsd4_has_session(cstate)) 28936668958fSAndy Adamson flags |= HAS_SESSION; 28946668958fSAndy Adamson 28951da177e4SLinus Torvalds /* 28961da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 28971da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 28981da177e4SLinus Torvalds * number is incorrect. 28991da177e4SLinus Torvalds */ 2900f8816512SNeilBrown stp = find_stateid(stateid, flags); 2901f8816512SNeilBrown if (stp == NULL) { 2902f8816512SNeilBrown /* 2903f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2904f8816512SNeilBrown * a replayed close: 2905f8816512SNeilBrown */ 2906f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2907f8816512SNeilBrown if (sop == NULL) 290878155ed7SBian Naimeng return stateid_error_map(stateid); 2909f8816512SNeilBrown *sopp = sop; 2910f8816512SNeilBrown goto check_replay; 2911f8816512SNeilBrown } 29121da177e4SLinus Torvalds 291339325bd0SJ. Bruce Fields *stpp = stp; 291439325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 291539325bd0SJ. Bruce Fields 29164c4cd222SNeilBrown if (lock) { 29174c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 29181da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 29194c4cd222SNeilBrown int lkflg = 0; 2920b37ad28bSAl Viro __be32 status; 29211da177e4SLinus Torvalds 29224c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 29234c4cd222SNeilBrown 29244c4cd222SNeilBrown if (lock->lk_is_new) { 29251da177e4SLinus Torvalds if (!sop->so_is_open_owner) 29263a4f98bbSNeilBrown return nfserr_bad_stateid; 292760adfc50SAndy Adamson if (!(flags & HAS_SESSION) && 292860adfc50SAndy Adamson !same_clid(&clp->cl_clientid, lockclid)) 29293a4f98bbSNeilBrown return nfserr_bad_stateid; 29304c4cd222SNeilBrown /* stp is the open stateid */ 29314c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 29324c4cd222SNeilBrown if (status) 29334c4cd222SNeilBrown return status; 29344c4cd222SNeilBrown } else { 29354c4cd222SNeilBrown /* stp is the lock stateid */ 29364c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 29374c4cd222SNeilBrown if (status) 29384c4cd222SNeilBrown return status; 29394c4cd222SNeilBrown } 29401da177e4SLinus Torvalds } 29411da177e4SLinus Torvalds 2942f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 29432fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 29443a4f98bbSNeilBrown return nfserr_bad_stateid; 29451da177e4SLinus Torvalds } 29461da177e4SLinus Torvalds 29471da177e4SLinus Torvalds /* 29481da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 29491da177e4SLinus Torvalds * For the moment, we ignore the possibility of 29501da177e4SLinus Torvalds * generation number wraparound. 29511da177e4SLinus Torvalds */ 29526668958fSAndy Adamson if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) 29531da177e4SLinus Torvalds goto check_replay; 29541da177e4SLinus Torvalds 29553a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 29562fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 29573a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 29583a4f98bbSNeilBrown return nfserr_bad_stateid; 29591da177e4SLinus Torvalds } 29603a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 29612fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 29623a4f98bbSNeilBrown " confirmed yet!\n"); 29633a4f98bbSNeilBrown return nfserr_bad_stateid; 29641da177e4SLinus Torvalds } 29656668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, flags); 29660836f587SJ. Bruce Fields if (status) 29670836f587SJ. Bruce Fields return status; 296852fd004eSNeilBrown renew_client(sop->so_client); 29693a4f98bbSNeilBrown return nfs_ok; 29701da177e4SLinus Torvalds 29711da177e4SLinus Torvalds check_replay: 2972bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2973849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 29741da177e4SLinus Torvalds /* indicate replay to calling function */ 2975a90b061cSAl Viro return nfserr_replay_me; 29761da177e4SLinus Torvalds } 29772fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 29783a4f98bbSNeilBrown sop->so_seqid, seqid); 29793a4f98bbSNeilBrown *sopp = NULL; 29803a4f98bbSNeilBrown return nfserr_bad_seqid; 29811da177e4SLinus Torvalds } 29821da177e4SLinus Torvalds 2983b37ad28bSAl Viro __be32 2984ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2985a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 29861da177e4SLinus Torvalds { 2987b37ad28bSAl Viro __be32 status; 29881da177e4SLinus Torvalds struct nfs4_stateowner *sop; 29891da177e4SLinus Torvalds struct nfs4_stateid *stp; 29901da177e4SLinus Torvalds 29911da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2992ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2993ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 29941da177e4SLinus Torvalds 2995ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 2996a8cddc5dSJ. Bruce Fields if (status) 2997a8cddc5dSJ. Bruce Fields return status; 29981da177e4SLinus Torvalds 29991da177e4SLinus Torvalds nfs4_lock_state(); 30001da177e4SLinus Torvalds 3001dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3002ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 3003f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 30041da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 30051da177e4SLinus Torvalds goto out; 30061da177e4SLinus Torvalds 30071da177e4SLinus Torvalds sop = oc->oc_stateowner; 30081da177e4SLinus Torvalds sop->so_confirmed = 1; 30091da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 30101da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 30118c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 30128c10cbdbSBenny Halevy __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); 3013c7b9a459SNeilBrown 3014c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 30151da177e4SLinus Torvalds out: 3016f2327d9aSNeil Brown if (oc->oc_stateowner) { 30171da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 3018a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 3019f2327d9aSNeil Brown } 30201da177e4SLinus Torvalds nfs4_unlock_state(); 30211da177e4SLinus Torvalds return status; 30221da177e4SLinus Torvalds } 30231da177e4SLinus Torvalds 30241da177e4SLinus Torvalds 30251da177e4SLinus Torvalds /* 30261da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 30271da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 30281da177e4SLinus Torvalds */ 30291da177e4SLinus Torvalds static void 30301da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 30311da177e4SLinus Torvalds { 30321da177e4SLinus Torvalds int i; 30331da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 30341da177e4SLinus Torvalds if ((i & access) != i) 30351da177e4SLinus Torvalds __clear_bit(i, bmap); 30361da177e4SLinus Torvalds } 30371da177e4SLinus Torvalds } 30381da177e4SLinus Torvalds 30391da177e4SLinus Torvalds static void 30401da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 30411da177e4SLinus Torvalds { 30421da177e4SLinus Torvalds int i; 30431da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 30441da177e4SLinus Torvalds if ((i & deny) != i) 30451da177e4SLinus Torvalds __clear_bit(i, bmap); 30461da177e4SLinus Torvalds } 30471da177e4SLinus Torvalds } 30481da177e4SLinus Torvalds 3049b37ad28bSAl Viro __be32 3050ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3051ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3052a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 30531da177e4SLinus Torvalds { 3054b37ad28bSAl Viro __be32 status; 30551da177e4SLinus Torvalds struct nfs4_stateid *stp; 30561da177e4SLinus Torvalds unsigned int share_access; 30571da177e4SLinus Torvalds 30581da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3059ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3060ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 30611da177e4SLinus Torvalds 3062d87a8adeSAndy Adamson if (!access_valid(od->od_share_access, cstate->minorversion) 3063ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 30641da177e4SLinus Torvalds return nfserr_inval; 30651da177e4SLinus Torvalds 30661da177e4SLinus Torvalds nfs4_lock_state(); 3067dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3068ca364317SJ.Bruce Fields od->od_seqid, 30691da177e4SLinus Torvalds &od->od_stateid, 3070f3362737SJ. Bruce Fields OPEN_STATE, 30711da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 30721da177e4SLinus Torvalds goto out; 30731da177e4SLinus Torvalds 30741da177e4SLinus Torvalds status = nfserr_inval; 30751da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 30761da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 30771da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 30781da177e4SLinus Torvalds goto out; 30791da177e4SLinus Torvalds } 30801da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 30811da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 30821da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 30831da177e4SLinus Torvalds goto out; 30841da177e4SLinus Torvalds } 30851da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 30861da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 30871da177e4SLinus Torvalds share_access & ~od->od_share_access); 30881da177e4SLinus Torvalds 30891da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 30901da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 30911da177e4SLinus Torvalds 30921da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 30931da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 30941da177e4SLinus Torvalds status = nfs_ok; 30951da177e4SLinus Torvalds out: 3096f2327d9aSNeil Brown if (od->od_stateowner) { 30971da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 3098a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 3099f2327d9aSNeil Brown } 31001da177e4SLinus Torvalds nfs4_unlock_state(); 31011da177e4SLinus Torvalds return status; 31021da177e4SLinus Torvalds } 31031da177e4SLinus Torvalds 31041da177e4SLinus Torvalds /* 31051da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 31061da177e4SLinus Torvalds */ 3107b37ad28bSAl Viro __be32 3108ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3109a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 31101da177e4SLinus Torvalds { 3111b37ad28bSAl Viro __be32 status; 31121da177e4SLinus Torvalds struct nfs4_stateid *stp; 31131da177e4SLinus Torvalds 31141da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3115ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3116ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 31171da177e4SLinus Torvalds 31181da177e4SLinus Torvalds nfs4_lock_state(); 31191da177e4SLinus Torvalds /* check close_lru for replay */ 3120dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3121ca364317SJ.Bruce Fields close->cl_seqid, 31221da177e4SLinus Torvalds &close->cl_stateid, 3123f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 31241da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 31251da177e4SLinus Torvalds goto out; 31261da177e4SLinus Torvalds status = nfs_ok; 31271da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 31281da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 31291da177e4SLinus Torvalds 313004ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 31312283963fSJ. Bruce Fields release_open_stateid(stp); 313204ef5954SJ. Bruce Fields 313304ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 313404ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 313504ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 313604ef5954SJ. Bruce Fields */ 313704ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 313804ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 31391da177e4SLinus Torvalds out: 3140f2327d9aSNeil Brown if (close->cl_stateowner) { 31411da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 3142a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 3143f2327d9aSNeil Brown } 31441da177e4SLinus Torvalds nfs4_unlock_state(); 31451da177e4SLinus Torvalds return status; 31461da177e4SLinus Torvalds } 31471da177e4SLinus Torvalds 3148b37ad28bSAl Viro __be32 3149ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3150ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 31511da177e4SLinus Torvalds { 3152203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3153203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 3154203a8c8eSJ. Bruce Fields struct inode *inode; 3155b37ad28bSAl Viro __be32 status; 31566668958fSAndy Adamson int flags = 0; 31571da177e4SLinus Torvalds 3158ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3159203a8c8eSJ. Bruce Fields return status; 3160203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 31611da177e4SLinus Torvalds 31626668958fSAndy Adamson if (nfsd4_has_session(cstate)) 31636668958fSAndy Adamson flags |= HAS_SESSION; 31641da177e4SLinus Torvalds nfs4_lock_state(); 3165203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 3166203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3167203a8c8eSJ. Bruce Fields goto out; 3168203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 3169203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 3170203a8c8eSJ. Bruce Fields goto out; 31717e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 3172203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 3173203a8c8eSJ. Bruce Fields goto out; 3174203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 317578155ed7SBian Naimeng if (!dp) { 317678155ed7SBian Naimeng status = stateid_error_map(stateid); 3177203a8c8eSJ. Bruce Fields goto out; 317878155ed7SBian Naimeng } 31796668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, flags); 3180203a8c8eSJ. Bruce Fields if (status) 3181203a8c8eSJ. Bruce Fields goto out; 3182203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 3183203a8c8eSJ. Bruce Fields 3184203a8c8eSJ. Bruce Fields unhash_delegation(dp); 31851da177e4SLinus Torvalds out: 3186203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3187203a8c8eSJ. Bruce Fields 31881da177e4SLinus Torvalds return status; 31891da177e4SLinus Torvalds } 31901da177e4SLinus Torvalds 31911da177e4SLinus Torvalds 31921da177e4SLinus Torvalds /* 31931da177e4SLinus Torvalds * Lock owner state (byte-range locks) 31941da177e4SLinus Torvalds */ 31951da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 31961da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 31971da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 31981da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 31991da177e4SLinus Torvalds 320087df4de8SBenny Halevy static inline u64 320187df4de8SBenny Halevy end_offset(u64 start, u64 len) 320287df4de8SBenny Halevy { 320387df4de8SBenny Halevy u64 end; 320487df4de8SBenny Halevy 320587df4de8SBenny Halevy end = start + len; 320687df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 320787df4de8SBenny Halevy } 320887df4de8SBenny Halevy 320987df4de8SBenny Halevy /* last octet in a range */ 321087df4de8SBenny Halevy static inline u64 321187df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 321287df4de8SBenny Halevy { 321387df4de8SBenny Halevy u64 end; 321487df4de8SBenny Halevy 321587df4de8SBenny Halevy BUG_ON(!len); 321687df4de8SBenny Halevy end = start + len; 321787df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 321887df4de8SBenny Halevy } 321987df4de8SBenny Halevy 32201da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 32211da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 32221da177e4SLinus Torvalds 32231da177e4SLinus Torvalds static inline unsigned int 32241da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 32251da177e4SLinus Torvalds struct xdr_netobj *ownername) 32261da177e4SLinus Torvalds { 32271da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 32281da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 32291da177e4SLinus Torvalds & LOCK_HASH_MASK; 32301da177e4SLinus Torvalds } 32311da177e4SLinus Torvalds 32321da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 32331da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 32341da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 32351da177e4SLinus Torvalds 3236fd39ca9aSNeilBrown static struct nfs4_stateid * 32371da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 32381da177e4SLinus Torvalds { 32399346eff0SKrishna Kumar struct nfs4_stateid *local; 32401da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 32411da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 32421da177e4SLinus Torvalds unsigned int hashval; 32431da177e4SLinus Torvalds 32441da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 32459346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 32461da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 32471da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 32481da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 32491da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 32501da177e4SLinus Torvalds return local; 32511da177e4SLinus Torvalds } 32521da177e4SLinus Torvalds } 32539346eff0SKrishna Kumar 32549346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 32551da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 32561da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 32571da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 32581da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 32591da177e4SLinus Torvalds return local; 32601da177e4SLinus Torvalds } 3261849823c5SNeil Brown } 32621da177e4SLinus Torvalds return NULL; 32631da177e4SLinus Torvalds } 32641da177e4SLinus Torvalds 32651da177e4SLinus Torvalds static struct nfs4_delegation * 32661da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 32671da177e4SLinus Torvalds { 326813cd2184SNeilBrown struct nfs4_file *fp; 326913cd2184SNeilBrown struct nfs4_delegation *dl; 32701da177e4SLinus Torvalds 32718c10cbdbSBenny Halevy dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, 32728c10cbdbSBenny Halevy STATEID_VAL(stid)); 32731da177e4SLinus Torvalds 32741da177e4SLinus Torvalds fp = find_file(ino); 327513cd2184SNeilBrown if (!fp) 32761da177e4SLinus Torvalds return NULL; 327713cd2184SNeilBrown dl = find_delegation_file(fp, stid); 327813cd2184SNeilBrown put_nfs4_file(fp); 327913cd2184SNeilBrown return dl; 32801da177e4SLinus Torvalds } 32811da177e4SLinus Torvalds 32821da177e4SLinus Torvalds /* 32831da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 32841da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 32851da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 32861da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 32871da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 32881da177e4SLinus Torvalds * the VFS, but this is a very deep change! 32891da177e4SLinus Torvalds */ 32901da177e4SLinus Torvalds static inline void 32911da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 32921da177e4SLinus Torvalds { 32931da177e4SLinus Torvalds if (lock->fl_start < 0) 32941da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 32951da177e4SLinus Torvalds if (lock->fl_end < 0) 32961da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 32971da177e4SLinus Torvalds } 32981da177e4SLinus Torvalds 3299d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3300d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 33017b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3302d5b9026aSNeilBrown }; 33031da177e4SLinus Torvalds 33041da177e4SLinus Torvalds static inline void 33051da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 33061da177e4SLinus Torvalds { 3307d5b9026aSNeilBrown struct nfs4_stateowner *sop; 3308d5b9026aSNeilBrown unsigned int hval; 33091da177e4SLinus Torvalds 3310d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3311d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 3312d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 33131da177e4SLinus Torvalds kref_get(&sop->so_ref); 33141da177e4SLinus Torvalds deny->ld_sop = sop; 33151da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 3316d5b9026aSNeilBrown } else { 3317d5b9026aSNeilBrown deny->ld_sop = NULL; 3318d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3319d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 33201da177e4SLinus Torvalds } 33211da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 332287df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 332387df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 33241da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 33251da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 33261da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 33271da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 33281da177e4SLinus Torvalds } 33291da177e4SLinus Torvalds 33301da177e4SLinus Torvalds static struct nfs4_stateowner * 33311da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 33321da177e4SLinus Torvalds struct xdr_netobj *owner) 33331da177e4SLinus Torvalds { 33341da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 33351da177e4SLinus Torvalds struct nfs4_stateowner *op; 33361da177e4SLinus Torvalds 33371da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3338599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 33391da177e4SLinus Torvalds return op; 33401da177e4SLinus Torvalds } 33411da177e4SLinus Torvalds return NULL; 33421da177e4SLinus Torvalds } 33431da177e4SLinus Torvalds 33441da177e4SLinus Torvalds /* 33451da177e4SLinus Torvalds * Alloc a lock owner structure. 33461da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 33471da177e4SLinus Torvalds * occured. 33481da177e4SLinus Torvalds * 33491da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 33501da177e4SLinus Torvalds */ 33511da177e4SLinus Torvalds 33521da177e4SLinus Torvalds static struct nfs4_stateowner * 33531da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 33541da177e4SLinus Torvalds struct nfs4_stateowner *sop; 33551da177e4SLinus Torvalds struct nfs4_replay *rp; 33561da177e4SLinus Torvalds unsigned int idhashval; 33571da177e4SLinus Torvalds 33581da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 33591da177e4SLinus Torvalds return NULL; 33601da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 33611da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 33621da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 33631da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 3364ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 3365ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 33661da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 33671da177e4SLinus Torvalds sop->so_time = 0; 33681da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 33691da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3370ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 33711da177e4SLinus Torvalds sop->so_is_open_owner = 0; 33721da177e4SLinus Torvalds sop->so_id = current_ownerid++; 33731da177e4SLinus Torvalds sop->so_client = clp; 3374b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3375b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3376b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 33771da177e4SLinus Torvalds sop->so_confirmed = 1; 33781da177e4SLinus Torvalds rp = &sop->so_replay; 3379de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 33801da177e4SLinus Torvalds rp->rp_buflen = 0; 33811da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 33821da177e4SLinus Torvalds return sop; 33831da177e4SLinus Torvalds } 33841da177e4SLinus Torvalds 3385fd39ca9aSNeilBrown static struct nfs4_stateid * 33861da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 33871da177e4SLinus Torvalds { 33881da177e4SLinus Torvalds struct nfs4_stateid *stp; 33891da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 33901da177e4SLinus Torvalds 33915ac049acSNeilBrown stp = nfs4_alloc_stateid(); 33925ac049acSNeilBrown if (stp == NULL) 33931da177e4SLinus Torvalds goto out; 33941da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 33951da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3396ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3397ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 33981da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 33998beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3400ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 34011da177e4SLinus Torvalds stp->st_stateowner = sop; 340213cd2184SNeilBrown get_nfs4_file(fp); 34031da177e4SLinus Torvalds stp->st_file = fp; 340478155ed7SBian Naimeng stp->st_stateid.si_boot = get_seconds(); 34051da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 34061da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 34071da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 34081da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 34091da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 34101da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 34114c4cd222SNeilBrown stp->st_openstp = open_stp; 34121da177e4SLinus Torvalds 34131da177e4SLinus Torvalds out: 34141da177e4SLinus Torvalds return stp; 34151da177e4SLinus Torvalds } 34161da177e4SLinus Torvalds 3417fd39ca9aSNeilBrown static int 34181da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 34191da177e4SLinus Torvalds { 342087df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 34211da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 34221da177e4SLinus Torvalds } 34231da177e4SLinus Torvalds 34241da177e4SLinus Torvalds /* 34251da177e4SLinus Torvalds * LOCK operation 34261da177e4SLinus Torvalds */ 3427b37ad28bSAl Viro __be32 3428ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3429a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 34301da177e4SLinus Torvalds { 34313e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 3432b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 34331da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 34341da177e4SLinus Torvalds struct file *filp; 34351da177e4SLinus Torvalds struct file_lock file_lock; 34368dc7c311SAndy Adamson struct file_lock conflock; 3437b37ad28bSAl Viro __be32 status = 0; 34381da177e4SLinus Torvalds unsigned int strhashval; 3439150b3934SMarc Eshel unsigned int cmd; 3440b8dd7b9aSAl Viro int err; 34411da177e4SLinus Torvalds 34421da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 34431da177e4SLinus Torvalds (long long) lock->lk_offset, 34441da177e4SLinus Torvalds (long long) lock->lk_length); 34451da177e4SLinus Torvalds 34461da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 34471da177e4SLinus Torvalds return nfserr_inval; 34481da177e4SLinus Torvalds 3449ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 34508837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3451a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3452a6f6ef2fSAndy Adamson return status; 3453a6f6ef2fSAndy Adamson } 3454a6f6ef2fSAndy Adamson 34551da177e4SLinus Torvalds nfs4_lock_state(); 34561da177e4SLinus Torvalds 34571da177e4SLinus Torvalds if (lock->lk_is_new) { 34581da177e4SLinus Torvalds /* 34591da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3460893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3461893f8770SNeilBrown * lock stateid. 34621da177e4SLinus Torvalds */ 34631da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 34641da177e4SLinus Torvalds struct nfs4_file *fp; 34651da177e4SLinus Torvalds 34661da177e4SLinus Torvalds status = nfserr_stale_clientid; 346760adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && 346860adfc50SAndy Adamson STALE_CLIENTID(&lock->lk_new_clientid)) 34691da177e4SLinus Torvalds goto out; 34701da177e4SLinus Torvalds 34711da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3472dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 34731da177e4SLinus Torvalds lock->lk_new_open_seqid, 34741da177e4SLinus Torvalds &lock->lk_new_open_stateid, 3475f3362737SJ. Bruce Fields OPEN_STATE, 34763a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 3477b59e3c0eSNeil Brown lock); 347837515177SNeilBrown if (status) 34791da177e4SLinus Torvalds goto out; 34803a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 34811da177e4SLinus Torvalds /* create lockowner and lock stateid */ 34821da177e4SLinus Torvalds fp = open_stp->st_file; 34831da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 34841da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 34851da177e4SLinus Torvalds &lock->v.new.owner); 34863e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 34873e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 34883e9e3dbeSNeilBrown * create new stateids)? */ 34891da177e4SLinus Torvalds status = nfserr_resource; 3490b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 3491b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 3492b59e3c0eSNeil Brown if (lock_sop == NULL) 34931da177e4SLinus Torvalds goto out; 3494b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 34958a280510SJ. Bruce Fields if (lock_stp == NULL) 34961da177e4SLinus Torvalds goto out; 34971da177e4SLinus Torvalds } else { 34981da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 3499dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 35001da177e4SLinus Torvalds lock->lk_old_lock_seqid, 35011da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 3502f3362737SJ. Bruce Fields LOCK_STATE, 35033a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 35041da177e4SLinus Torvalds if (status) 35051da177e4SLinus Torvalds goto out; 35063a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 35071da177e4SLinus Torvalds } 35083a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 35091da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 35101da177e4SLinus Torvalds 35110dd395dcSNeilBrown status = nfserr_grace; 3512af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 35130dd395dcSNeilBrown goto out; 35140dd395dcSNeilBrown status = nfserr_no_grace; 3515af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 35160dd395dcSNeilBrown goto out; 35170dd395dcSNeilBrown 35181da177e4SLinus Torvalds locks_init_lock(&file_lock); 35191da177e4SLinus Torvalds switch (lock->lk_type) { 35201da177e4SLinus Torvalds case NFS4_READ_LT: 35211da177e4SLinus Torvalds case NFS4_READW_LT: 35221da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 3523150b3934SMarc Eshel cmd = F_SETLK; 35241da177e4SLinus Torvalds break; 35251da177e4SLinus Torvalds case NFS4_WRITE_LT: 35261da177e4SLinus Torvalds case NFS4_WRITEW_LT: 35271da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 3528150b3934SMarc Eshel cmd = F_SETLK; 35291da177e4SLinus Torvalds break; 35301da177e4SLinus Torvalds default: 35311da177e4SLinus Torvalds status = nfserr_inval; 35321da177e4SLinus Torvalds goto out; 35331da177e4SLinus Torvalds } 3534b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 35351da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 35361da177e4SLinus Torvalds file_lock.fl_file = filp; 35371da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3538d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 35391da177e4SLinus Torvalds 35401da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 354187df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 35421da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 35431da177e4SLinus Torvalds 35441da177e4SLinus Torvalds /* 35451da177e4SLinus Torvalds * Try to lock the file in the VFS. 35461da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 35471da177e4SLinus Torvalds */ 35481da177e4SLinus Torvalds 3549fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 3550b8dd7b9aSAl Viro switch (-err) { 35511da177e4SLinus Torvalds case 0: /* success! */ 35521da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 35531da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 35541da177e4SLinus Torvalds sizeof(stateid_t)); 3555b8dd7b9aSAl Viro status = 0; 3556eb76b3fdSAndy Adamson break; 3557eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 3558eb76b3fdSAndy Adamson status = nfserr_denied; 3559eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 3560eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 3561eb76b3fdSAndy Adamson break; 35621da177e4SLinus Torvalds case (EDEADLK): 35631da177e4SLinus Torvalds status = nfserr_deadlock; 3564eb76b3fdSAndy Adamson break; 35651da177e4SLinus Torvalds default: 3566fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 3567eb76b3fdSAndy Adamson status = nfserr_resource; 3568eb76b3fdSAndy Adamson break; 35691da177e4SLinus Torvalds } 35701da177e4SLinus Torvalds out: 35718a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 3572f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 35733a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 35743a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 3575a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 3576f2327d9aSNeil Brown } 35771da177e4SLinus Torvalds nfs4_unlock_state(); 35781da177e4SLinus Torvalds return status; 35791da177e4SLinus Torvalds } 35801da177e4SLinus Torvalds 35811da177e4SLinus Torvalds /* 358255ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 358355ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 358455ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 358555ef1274SJ. Bruce Fields * inode operation.) 358655ef1274SJ. Bruce Fields */ 358755ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 358855ef1274SJ. Bruce Fields { 358955ef1274SJ. Bruce Fields struct file *file; 359055ef1274SJ. Bruce Fields int err; 359155ef1274SJ. Bruce Fields 359255ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 359355ef1274SJ. Bruce Fields if (err) 359455ef1274SJ. Bruce Fields return err; 359555ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 359655ef1274SJ. Bruce Fields nfsd_close(file); 359755ef1274SJ. Bruce Fields return err; 359855ef1274SJ. Bruce Fields } 359955ef1274SJ. Bruce Fields 360055ef1274SJ. Bruce Fields /* 36011da177e4SLinus Torvalds * LOCKT operation 36021da177e4SLinus Torvalds */ 3603b37ad28bSAl Viro __be32 3604ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3605ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 36061da177e4SLinus Torvalds { 36071da177e4SLinus Torvalds struct inode *inode; 36081da177e4SLinus Torvalds struct file_lock file_lock; 3609fd85b817SMarc Eshel int error; 3610b37ad28bSAl Viro __be32 status; 36111da177e4SLinus Torvalds 3612af558e33SJ. Bruce Fields if (locks_in_grace()) 36131da177e4SLinus Torvalds return nfserr_grace; 36141da177e4SLinus Torvalds 36151da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 36161da177e4SLinus Torvalds return nfserr_inval; 36171da177e4SLinus Torvalds 36181da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 36191da177e4SLinus Torvalds nfs4_lock_state(); 36201da177e4SLinus Torvalds 36211da177e4SLinus Torvalds status = nfserr_stale_clientid; 362260adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 36231da177e4SLinus Torvalds goto out; 36241da177e4SLinus Torvalds 3625ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 3626849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 36271da177e4SLinus Torvalds if (status == nfserr_symlink) 36281da177e4SLinus Torvalds status = nfserr_inval; 36291da177e4SLinus Torvalds goto out; 36301da177e4SLinus Torvalds } 36311da177e4SLinus Torvalds 3632ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 36331da177e4SLinus Torvalds locks_init_lock(&file_lock); 36341da177e4SLinus Torvalds switch (lockt->lt_type) { 36351da177e4SLinus Torvalds case NFS4_READ_LT: 36361da177e4SLinus Torvalds case NFS4_READW_LT: 36371da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 36381da177e4SLinus Torvalds break; 36391da177e4SLinus Torvalds case NFS4_WRITE_LT: 36401da177e4SLinus Torvalds case NFS4_WRITEW_LT: 36411da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 36421da177e4SLinus Torvalds break; 36431da177e4SLinus Torvalds default: 36442fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 36451da177e4SLinus Torvalds status = nfserr_inval; 36461da177e4SLinus Torvalds goto out; 36471da177e4SLinus Torvalds } 36481da177e4SLinus Torvalds 36491da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 36501da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 36511da177e4SLinus Torvalds if (lockt->lt_stateowner) 36521da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 36531da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 36541da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 36551da177e4SLinus Torvalds 36561da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 365787df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 36581da177e4SLinus Torvalds 36591da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 36601da177e4SLinus Torvalds 36611da177e4SLinus Torvalds status = nfs_ok; 366255ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 3663fd85b817SMarc Eshel if (error) { 3664fd85b817SMarc Eshel status = nfserrno(error); 3665fd85b817SMarc Eshel goto out; 3666fd85b817SMarc Eshel } 36679d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 36681da177e4SLinus Torvalds status = nfserr_denied; 36699d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 36701da177e4SLinus Torvalds } 36711da177e4SLinus Torvalds out: 36721da177e4SLinus Torvalds nfs4_unlock_state(); 36731da177e4SLinus Torvalds return status; 36741da177e4SLinus Torvalds } 36751da177e4SLinus Torvalds 3676b37ad28bSAl Viro __be32 3677ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3678a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 36791da177e4SLinus Torvalds { 36801da177e4SLinus Torvalds struct nfs4_stateid *stp; 36811da177e4SLinus Torvalds struct file *filp = NULL; 36821da177e4SLinus Torvalds struct file_lock file_lock; 3683b37ad28bSAl Viro __be32 status; 3684b8dd7b9aSAl Viro int err; 36851da177e4SLinus Torvalds 36861da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 36871da177e4SLinus Torvalds (long long) locku->lu_offset, 36881da177e4SLinus Torvalds (long long) locku->lu_length); 36891da177e4SLinus Torvalds 36901da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 36911da177e4SLinus Torvalds return nfserr_inval; 36921da177e4SLinus Torvalds 36931da177e4SLinus Torvalds nfs4_lock_state(); 36941da177e4SLinus Torvalds 3695dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 36961da177e4SLinus Torvalds locku->lu_seqid, 36971da177e4SLinus Torvalds &locku->lu_stateid, 3698f3362737SJ. Bruce Fields LOCK_STATE, 36991da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 37001da177e4SLinus Torvalds goto out; 37011da177e4SLinus Torvalds 37021da177e4SLinus Torvalds filp = stp->st_vfs_file; 37031da177e4SLinus Torvalds BUG_ON(!filp); 37041da177e4SLinus Torvalds locks_init_lock(&file_lock); 37051da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 37061da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 37071da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 37081da177e4SLinus Torvalds file_lock.fl_file = filp; 37091da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3710d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 37111da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 37121da177e4SLinus Torvalds 371387df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 37141da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 37151da177e4SLinus Torvalds 37161da177e4SLinus Torvalds /* 37171da177e4SLinus Torvalds * Try to unlock the file in the VFS. 37181da177e4SLinus Torvalds */ 3719fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 3720b8dd7b9aSAl Viro if (err) { 3721fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 37221da177e4SLinus Torvalds goto out_nfserr; 37231da177e4SLinus Torvalds } 37241da177e4SLinus Torvalds /* 37251da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 37261da177e4SLinus Torvalds */ 37271da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 37281da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 37291da177e4SLinus Torvalds 37301da177e4SLinus Torvalds out: 3731f2327d9aSNeil Brown if (locku->lu_stateowner) { 37321da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 3733a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 3734f2327d9aSNeil Brown } 37351da177e4SLinus Torvalds nfs4_unlock_state(); 37361da177e4SLinus Torvalds return status; 37371da177e4SLinus Torvalds 37381da177e4SLinus Torvalds out_nfserr: 3739b8dd7b9aSAl Viro status = nfserrno(err); 37401da177e4SLinus Torvalds goto out; 37411da177e4SLinus Torvalds } 37421da177e4SLinus Torvalds 37431da177e4SLinus Torvalds /* 37441da177e4SLinus Torvalds * returns 37451da177e4SLinus Torvalds * 1: locks held by lockowner 37461da177e4SLinus Torvalds * 0: no locks held by lockowner 37471da177e4SLinus Torvalds */ 37481da177e4SLinus Torvalds static int 37491da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 37501da177e4SLinus Torvalds { 37511da177e4SLinus Torvalds struct file_lock **flpp; 37527eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 37531da177e4SLinus Torvalds int status = 0; 37541da177e4SLinus Torvalds 37551da177e4SLinus Torvalds lock_kernel(); 37561da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 3757796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 37581da177e4SLinus Torvalds status = 1; 37591da177e4SLinus Torvalds goto out; 37601da177e4SLinus Torvalds } 3761796dadfdSJ. Bruce Fields } 37621da177e4SLinus Torvalds out: 37631da177e4SLinus Torvalds unlock_kernel(); 37641da177e4SLinus Torvalds return status; 37651da177e4SLinus Torvalds } 37661da177e4SLinus Torvalds 3767b37ad28bSAl Viro __be32 3768b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 3769b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 3770b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 37711da177e4SLinus Torvalds { 37721da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 37733e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 37743e9e3dbeSNeilBrown struct nfs4_stateid *stp; 37751da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 37763e9e3dbeSNeilBrown struct list_head matches; 37773e9e3dbeSNeilBrown int i; 3778b37ad28bSAl Viro __be32 status; 37791da177e4SLinus Torvalds 37801da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 37811da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 37821da177e4SLinus Torvalds 37831da177e4SLinus Torvalds /* XXX check for lease expiration */ 37841da177e4SLinus Torvalds 37851da177e4SLinus Torvalds status = nfserr_stale_clientid; 3786849823c5SNeil Brown if (STALE_CLIENTID(clid)) 37871da177e4SLinus Torvalds return status; 37881da177e4SLinus Torvalds 37891da177e4SLinus Torvalds nfs4_lock_state(); 37901da177e4SLinus Torvalds 37911da177e4SLinus Torvalds status = nfserr_locks_held; 37923e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 37933e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 37943e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 37953e9e3dbeSNeilBrown * data structures. */ 37963e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 37973e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 37983e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 3799599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 38003e9e3dbeSNeilBrown continue; 38013e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3802ea1da636SNeilBrown st_perstateowner) { 38033e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 38041da177e4SLinus Torvalds goto out; 38053e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 38063e9e3dbeSNeilBrown * so it's OK to fool with here. */ 38073e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 38081da177e4SLinus Torvalds } 38093e9e3dbeSNeilBrown } 38103e9e3dbeSNeilBrown } 38113e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 38123e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 38133e9e3dbeSNeilBrown * have been checked. */ 38141da177e4SLinus Torvalds status = nfs_ok; 38150fa822e4SNeilBrown while (!list_empty(&matches)) { 38160fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 38170fa822e4SNeilBrown so_perclient); 38180fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 38190fa822e4SNeilBrown * for openowners. */ 38200fa822e4SNeilBrown list_del(&sop->so_perclient); 3821f044ff83SJ. Bruce Fields release_lockowner(sop); 38221da177e4SLinus Torvalds } 38231da177e4SLinus Torvalds out: 38241da177e4SLinus Torvalds nfs4_unlock_state(); 38251da177e4SLinus Torvalds return status; 38261da177e4SLinus Torvalds } 38271da177e4SLinus Torvalds 38281da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3829a55370a3SNeilBrown alloc_reclaim(void) 38301da177e4SLinus Torvalds { 3831a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 38321da177e4SLinus Torvalds } 38331da177e4SLinus Torvalds 3834c7b9a459SNeilBrown int 3835a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 3836c7b9a459SNeilBrown { 3837c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3838c7b9a459SNeilBrown struct nfs4_client *clp; 3839c7b9a459SNeilBrown 3840a1bcecd2SAndy Adamson clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); 3841c7b9a459SNeilBrown return clp ? 1 : 0; 3842c7b9a459SNeilBrown } 3843c7b9a459SNeilBrown 38441da177e4SLinus Torvalds /* 38451da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 38461da177e4SLinus Torvalds */ 3847190e4fbfSNeilBrown int 3848190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 38491da177e4SLinus Torvalds { 38501da177e4SLinus Torvalds unsigned int strhashval; 38511da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 38521da177e4SLinus Torvalds 3853a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3854a55370a3SNeilBrown crp = alloc_reclaim(); 38551da177e4SLinus Torvalds if (!crp) 38561da177e4SLinus Torvalds return 0; 3857a55370a3SNeilBrown strhashval = clientstr_hashval(name); 38581da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 38591da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3860a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 38611da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 38621da177e4SLinus Torvalds return 1; 38631da177e4SLinus Torvalds } 38641da177e4SLinus Torvalds 38651da177e4SLinus Torvalds static void 38661da177e4SLinus Torvalds nfs4_release_reclaim(void) 38671da177e4SLinus Torvalds { 38681da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 38691da177e4SLinus Torvalds int i; 38701da177e4SLinus Torvalds 38711da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 38721da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 38731da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 38741da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 38751da177e4SLinus Torvalds list_del(&crp->cr_strhash); 38761da177e4SLinus Torvalds kfree(crp); 38771da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 38781da177e4SLinus Torvalds } 38791da177e4SLinus Torvalds } 38801da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 38811da177e4SLinus Torvalds } 38821da177e4SLinus Torvalds 38831da177e4SLinus Torvalds /* 38841da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3885fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 38861da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 38871da177e4SLinus Torvalds { 38881da177e4SLinus Torvalds unsigned int strhashval; 38891da177e4SLinus Torvalds struct nfs4_client *clp; 38901da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 38911da177e4SLinus Torvalds 38921da177e4SLinus Torvalds 38931da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 38941da177e4SLinus Torvalds clp = find_confirmed_client(clid); 38951da177e4SLinus Torvalds if (clp == NULL) 38961da177e4SLinus Torvalds return NULL; 38971da177e4SLinus Torvalds 3898a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3899a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3900a55370a3SNeilBrown clp->cl_recdir); 39011da177e4SLinus Torvalds 39021da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3903a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 39041da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3905a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 39061da177e4SLinus Torvalds return crp; 39071da177e4SLinus Torvalds } 39081da177e4SLinus Torvalds } 39091da177e4SLinus Torvalds return NULL; 39101da177e4SLinus Torvalds } 39111da177e4SLinus Torvalds 39121da177e4SLinus Torvalds /* 39131da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 39141da177e4SLinus Torvalds */ 3915b37ad28bSAl Viro __be32 39161da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 39171da177e4SLinus Torvalds { 3918dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 39191da177e4SLinus Torvalds } 39201da177e4SLinus Torvalds 3921ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 39221da177e4SLinus Torvalds 3923e8ff2a84SJ. Bruce Fields int 3924ac4d8ff2SNeilBrown nfs4_state_init(void) 39251da177e4SLinus Torvalds { 3926e8ff2a84SJ. Bruce Fields int i, status; 39271da177e4SLinus Torvalds 3928e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 3929e8ff2a84SJ. Bruce Fields if (status) 3930e8ff2a84SJ. Bruce Fields return status; 39311da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 39321da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 39331da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 39341da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 39351da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 393602cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 39371da177e4SLinus Torvalds } 39385282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 39395282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 39401da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 39411da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 39421da177e4SLinus Torvalds } 39431da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 39441da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 39451da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 39461da177e4SLinus Torvalds } 39471da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 39481da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 39491da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 39501da177e4SLinus Torvalds } 39511da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 39521da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 39531da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 39541da177e4SLinus Torvalds } 39551da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 39561da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 39571da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 39581da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3959ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3960e8ff2a84SJ. Bruce Fields return 0; 3961ac4d8ff2SNeilBrown } 3962ac4d8ff2SNeilBrown 3963190e4fbfSNeilBrown static void 3964190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3965190e4fbfSNeilBrown { 3966190e4fbfSNeilBrown int status; 3967190e4fbfSNeilBrown 39680964a3d3SNeilBrown nfs4_lock_state(); 39690964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3970190e4fbfSNeilBrown status = nfsd4_recdir_load(); 39710964a3d3SNeilBrown nfs4_unlock_state(); 3972190e4fbfSNeilBrown if (status) 3973190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3974190e4fbfSNeilBrown } 3975190e4fbfSNeilBrown 39769a8db97eSMarc Eshel unsigned long 39779a8db97eSMarc Eshel get_nfs4_grace_period(void) 39789a8db97eSMarc Eshel { 39799a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 39809a8db97eSMarc Eshel } 39819a8db97eSMarc Eshel 3982c2f1a551SMeelap Shah /* 3983c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 3984c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 3985c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 3986c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 3987c2f1a551SMeelap Shah * 3988c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 3989c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 3990c2f1a551SMeelap Shah */ 3991c2f1a551SMeelap Shah static void 3992c2f1a551SMeelap Shah set_max_delegations(void) 3993c2f1a551SMeelap Shah { 3994c2f1a551SMeelap Shah /* 3995c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 3996c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 3997c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 3998c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 3999c2f1a551SMeelap Shah */ 4000c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4001c2f1a551SMeelap Shah } 4002c2f1a551SMeelap Shah 4003ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4004ac4d8ff2SNeilBrown 400529ab23ccSJ. Bruce Fields static int 4006ac4d8ff2SNeilBrown __nfs4_state_start(void) 4007ac4d8ff2SNeilBrown { 40089a8db97eSMarc Eshel unsigned long grace_time; 4009ac4d8ff2SNeilBrown 40101da177e4SLinus Torvalds boot_time = get_seconds(); 4011af558e33SJ. Bruce Fields grace_time = get_nfs4_grace_period(); 4012d99a05adSNeilBrown lease_time = user_lease_time; 4013af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 40149a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 40159a8db97eSMarc Eshel grace_time/HZ); 401658da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 401729ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 401829ab23ccSJ. Bruce Fields return -ENOMEM; 40199a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 4020c2f1a551SMeelap Shah set_max_delegations(); 402180fc015bSJ. Bruce Fields return set_callback_cred(); 40221da177e4SLinus Torvalds } 40231da177e4SLinus Torvalds 402429ab23ccSJ. Bruce Fields int 402576a3550eSNeilBrown nfs4_state_start(void) 40261da177e4SLinus Torvalds { 402729ab23ccSJ. Bruce Fields int ret; 402829ab23ccSJ. Bruce Fields 40291da177e4SLinus Torvalds if (nfs4_init) 403029ab23ccSJ. Bruce Fields return 0; 4031190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 403229ab23ccSJ. Bruce Fields ret = __nfs4_state_start(); 403329ab23ccSJ. Bruce Fields if (ret) 403429ab23ccSJ. Bruce Fields return ret; 40351da177e4SLinus Torvalds nfs4_init = 1; 403629ab23ccSJ. Bruce Fields return 0; 40371da177e4SLinus Torvalds } 40381da177e4SLinus Torvalds 40391da177e4SLinus Torvalds time_t 40401da177e4SLinus Torvalds nfs4_lease_time(void) 40411da177e4SLinus Torvalds { 40421da177e4SLinus Torvalds return lease_time; 40431da177e4SLinus Torvalds } 40441da177e4SLinus Torvalds 40451da177e4SLinus Torvalds static void 40461da177e4SLinus Torvalds __nfs4_state_shutdown(void) 40471da177e4SLinus Torvalds { 40481da177e4SLinus Torvalds int i; 40491da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 40501da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 40511da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 40521da177e4SLinus Torvalds 40531da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 40541da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 40551da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 40561da177e4SLinus Torvalds expire_client(clp); 40571da177e4SLinus Torvalds } 40581da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 40591da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 40601da177e4SLinus Torvalds expire_client(clp); 40611da177e4SLinus Torvalds } 40621da177e4SLinus Torvalds } 40631da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 40641da177e4SLinus Torvalds spin_lock(&recall_lock); 40651da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 40661da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 40671da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 40681da177e4SLinus Torvalds } 40691da177e4SLinus Torvalds spin_unlock(&recall_lock); 40701da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 40711da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 40721da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 40731da177e4SLinus Torvalds unhash_delegation(dp); 40741da177e4SLinus Torvalds } 40751da177e4SLinus Torvalds 4076190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 40771da177e4SLinus Torvalds nfs4_init = 0; 40781da177e4SLinus Torvalds } 40791da177e4SLinus Torvalds 40801da177e4SLinus Torvalds void 40811da177e4SLinus Torvalds nfs4_state_shutdown(void) 40821da177e4SLinus Torvalds { 40835e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 40845e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 40852c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 40861da177e4SLinus Torvalds nfs4_lock_state(); 40871da177e4SLinus Torvalds nfs4_release_reclaim(); 40881da177e4SLinus Torvalds __nfs4_state_shutdown(); 40891da177e4SLinus Torvalds nfs4_unlock_state(); 40901da177e4SLinus Torvalds } 40911da177e4SLinus Torvalds 40923dd98a3bSJeff Layton /* 40933dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 40943dd98a3bSJeff Layton * accessed when nfsd is starting. 40953dd98a3bSJeff Layton */ 40960964a3d3SNeilBrown static void 40970964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 40980964a3d3SNeilBrown { 40990964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 41000964a3d3SNeilBrown } 41010964a3d3SNeilBrown 41020964a3d3SNeilBrown /* 41030964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 41040964a3d3SNeilBrown */ 41050964a3d3SNeilBrown int 41060964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 41070964a3d3SNeilBrown { 41080964a3d3SNeilBrown int status; 4109a63bb996SAl Viro struct path path; 41100964a3d3SNeilBrown 4111a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 41120964a3d3SNeilBrown if (status) 41130964a3d3SNeilBrown return status; 41140964a3d3SNeilBrown status = -ENOTDIR; 4115a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 41160964a3d3SNeilBrown nfs4_set_recdir(recdir); 41170964a3d3SNeilBrown status = 0; 41180964a3d3SNeilBrown } 4119a63bb996SAl Viro path_put(&path); 41200964a3d3SNeilBrown return status; 41210964a3d3SNeilBrown } 41220964a3d3SNeilBrown 41233dd98a3bSJeff Layton char * 41243dd98a3bSJeff Layton nfs4_recoverydir(void) 41253dd98a3bSJeff Layton { 41263dd98a3bSJeff Layton return user_recovery_dirname; 41273dd98a3bSJeff Layton } 41283dd98a3bSJeff Layton 41291da177e4SLinus Torvalds /* 41301da177e4SLinus Torvalds * Called when leasetime is changed. 41311da177e4SLinus Torvalds * 4132d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 4133d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 4134d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 4135d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 4136d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 41373dd98a3bSJeff Layton * 41383dd98a3bSJeff Layton * user_lease_time is protected by nfsd_mutex since it's only really accessed 41393dd98a3bSJeff Layton * when nfsd is starting 41401da177e4SLinus Torvalds */ 41411da177e4SLinus Torvalds void 41421da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 41431da177e4SLinus Torvalds { 4144d99a05adSNeilBrown user_lease_time = leasetime; 41451da177e4SLinus Torvalds } 4146