11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 61da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 91da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 101da177e4SLinus Torvalds * are met: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 131da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 141da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 161da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 171da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 181da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 191da177e4SLinus Torvalds * from this software without specific prior written permission. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 221da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 231da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 241da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 261da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 271da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 281da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 291da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 301da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 311da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 321da177e4SLinus Torvalds * 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 35aceaf78dSDave Hansen #include <linux/file.h> 36b89f4321SArnd Bergmann #include <linux/fs.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4068e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 41363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 429a74af21SBoaz Harrosh #include "xdr4.h" 430a3adadeSJ. Bruce Fields #include "vfs.h" 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds /* Globals */ 48cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 49efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 50fd39ca9aSNeilBrown static time_t boot_time; 511da177e4SLinus Torvalds static u32 current_ownerid = 1; 521da177e4SLinus Torvalds static u32 current_fileid = 1; 531da177e4SLinus Torvalds static u32 current_delegid = 1; 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 165998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 166f9d7562fSJ. Bruce Fields { 167f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 168f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 169f9d7562fSJ. Bruce Fields } 170f9d7562fSJ. Bruce Fields 171998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 172998db52cSJ. Bruce Fields { 173998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 174998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 175998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 176998db52cSJ. Bruce Fields } else 177998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 178998db52cSJ. Bruce Fields } 179998db52cSJ. Bruce Fields 180998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 181f9d7562fSJ. Bruce Fields { 182f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 183f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 184f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 185f9d7562fSJ. Bruce Fields } 186f9d7562fSJ. Bruce Fields } 187f9d7562fSJ. Bruce Fields 188998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 189f9d7562fSJ. Bruce Fields { 190f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 191f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 192f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 193f9d7562fSJ. Bruce Fields } 194f9d7562fSJ. Bruce Fields } 195f9d7562fSJ. Bruce Fields 196998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 197998db52cSJ. Bruce Fields { 198998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 199998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 200998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 201998db52cSJ. Bruce Fields } else 202998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 203998db52cSJ. Bruce Fields } 204998db52cSJ. Bruce Fields 2051da177e4SLinus Torvalds static struct nfs4_delegation * 2061da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 2071da177e4SLinus Torvalds { 2081da177e4SLinus Torvalds struct nfs4_delegation *dp; 2091da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 212c3e48080SJ. Bruce Fields /* 213c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 214c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 215c3e48080SJ. Bruce Fields * write delegations properly. 216c3e48080SJ. Bruce Fields */ 217c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 218c3e48080SJ. Bruce Fields return NULL; 21947f9940cSMeelap Shah if (fp->fi_had_conflict) 22047f9940cSMeelap Shah return NULL; 221c2f1a551SMeelap Shah if (num_delegations > max_delegations) 222ef0f3390SNeilBrown return NULL; 2235b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 2245b2d21c1SNeilBrown if (dp == NULL) 2251da177e4SLinus Torvalds return dp; 226ef0f3390SNeilBrown num_delegations++; 227ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 228ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 2291da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 2301da177e4SLinus Torvalds dp->dl_client = clp; 23113cd2184SNeilBrown get_nfs4_file(fp); 2321da177e4SLinus Torvalds dp->dl_file = fp; 233f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, O_RDONLY); 2341da177e4SLinus Torvalds dp->dl_flock = NULL; 2351da177e4SLinus Torvalds dp->dl_type = type; 236e4e83ea4SJ. Bruce Fields dp->dl_stateid.si_boot = boot_time; 2371da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2381da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2391da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2406c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 2411da177e4SLinus Torvalds dp->dl_time = 0; 2421da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 243ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 244ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 245b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 2461da177e4SLinus Torvalds return dp; 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds void 2501da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2511da177e4SLinus Torvalds { 2521da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2531da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 25413cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2555b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 256ef0f3390SNeilBrown num_delegations--; 2571da177e4SLinus Torvalds } 2581da177e4SLinus Torvalds } 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2611da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2621da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2631da177e4SLinus Torvalds * fl_release_callback. 2641da177e4SLinus Torvalds */ 2651da177e4SLinus Torvalds static void 2661da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2671da177e4SLinus Torvalds { 268f9d7562fSJ. Bruce Fields struct file *filp = find_readable_file(dp->dl_file); 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 271c907132dSNeilBrown if (dp->dl_flock) 272a9933ceaSJ. Bruce Fields vfs_setlease(filp, F_UNLCK, &dp->dl_flock); 273f9d7562fSJ. Bruce Fields nfs4_file_put_access(dp->dl_file, O_RDONLY); 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds /* Called under the state lock. */ 2771da177e4SLinus Torvalds static void 2781da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2791da177e4SLinus Torvalds { 280ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 281ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2821da177e4SLinus Torvalds spin_lock(&recall_lock); 2831da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2841da177e4SLinus Torvalds spin_unlock(&recall_lock); 2851da177e4SLinus Torvalds nfs4_close_delegation(dp); 2861da177e4SLinus Torvalds nfs4_put_delegation(dp); 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds /* 2901da177e4SLinus Torvalds * SETCLIENTID state 2911da177e4SLinus Torvalds */ 2921da177e4SLinus Torvalds 29336acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 2949089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 2959089f1b4SBenny Halevy 2961da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2971da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2981da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2991da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds #define clientid_hashval(id) \ 3021da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 303a55370a3SNeilBrown #define clientstr_hashval(name) \ 304a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 3051da177e4SLinus Torvalds /* 3061da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 3071da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 3081da177e4SLinus Torvalds * 3091da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 3101da177e4SLinus Torvalds * setclientid_confirmed info. 3111da177e4SLinus Torvalds * 3121da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 3131da177e4SLinus Torvalds * setclientid info. 3141da177e4SLinus Torvalds * 3151da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 3161da177e4SLinus Torvalds * for lease renewal. 3171da177e4SLinus Torvalds * 3181da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 3191da177e4SLinus Torvalds * for last close replay. 3201da177e4SLinus Torvalds */ 3211da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 3221da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 3231da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 3241da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 3251da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 3261da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 3271da177e4SLinus Torvalds static struct list_head client_lru; 3281da177e4SLinus Torvalds static struct list_head close_lru; 3291da177e4SLinus Torvalds 3302283963fSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 3312283963fSJ. Bruce Fields { 3322283963fSJ. Bruce Fields list_del(&stp->st_hash); 3332283963fSJ. Bruce Fields list_del(&stp->st_perfile); 3342283963fSJ. Bruce Fields list_del(&stp->st_perstateowner); 3352283963fSJ. Bruce Fields } 3362283963fSJ. Bruce Fields 3372283963fSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 3382283963fSJ. Bruce Fields { 3392283963fSJ. Bruce Fields put_nfs4_file(stp->st_file); 3402283963fSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 3412283963fSJ. Bruce Fields } 3422283963fSJ. Bruce Fields 3432283963fSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 3442283963fSJ. Bruce Fields { 345f9d7562fSJ. Bruce Fields struct file *file; 346f9d7562fSJ. Bruce Fields 3472283963fSJ. Bruce Fields unhash_generic_stateid(stp); 348f9d7562fSJ. Bruce Fields file = find_any_file(stp->st_file); 349f9d7562fSJ. Bruce Fields if (file) 350f9d7562fSJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); 3512283963fSJ. Bruce Fields free_generic_stateid(stp); 3522283963fSJ. Bruce Fields } 3532283963fSJ. Bruce Fields 354f044ff83SJ. Bruce Fields static void unhash_lockowner(struct nfs4_stateowner *sop) 355f044ff83SJ. Bruce Fields { 356f044ff83SJ. Bruce Fields struct nfs4_stateid *stp; 357f044ff83SJ. Bruce Fields 358f044ff83SJ. Bruce Fields list_del(&sop->so_idhash); 359f044ff83SJ. Bruce Fields list_del(&sop->so_strhash); 360f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); 361f044ff83SJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 362f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 363f044ff83SJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 364f044ff83SJ. Bruce Fields release_lock_stateid(stp); 365f044ff83SJ. Bruce Fields } 366f044ff83SJ. Bruce Fields } 367f044ff83SJ. Bruce Fields 368f044ff83SJ. Bruce Fields static void release_lockowner(struct nfs4_stateowner *sop) 369f044ff83SJ. Bruce Fields { 370f044ff83SJ. Bruce Fields unhash_lockowner(sop); 371f044ff83SJ. Bruce Fields nfs4_put_stateowner(sop); 372f044ff83SJ. Bruce Fields } 373f044ff83SJ. Bruce Fields 374f1d110caSJ. Bruce Fields static void 375f1d110caSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 376f1d110caSJ. Bruce Fields { 377f1d110caSJ. Bruce Fields struct nfs4_stateowner *lock_sop; 378f1d110caSJ. Bruce Fields 379f1d110caSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 380f1d110caSJ. Bruce Fields lock_sop = list_entry(open_stp->st_lockowners.next, 381f1d110caSJ. Bruce Fields struct nfs4_stateowner, so_perstateid); 382f1d110caSJ. Bruce Fields /* list_del(&open_stp->st_lockowners); */ 383f1d110caSJ. Bruce Fields BUG_ON(lock_sop->so_is_open_owner); 384f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 385f1d110caSJ. Bruce Fields } 386f1d110caSJ. Bruce Fields } 387f1d110caSJ. Bruce Fields 388f9d7562fSJ. Bruce Fields /* 389f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 390f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 391f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 392f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 393f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 394f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 395f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 396f9d7562fSJ. Bruce Fields * 397f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 398f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 399f9d7562fSJ. Bruce Fields * 400f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 401f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 402f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 403f9d7562fSJ. Bruce Fields * 404f9d7562fSJ. Bruce Fields * which we should reject. 405f9d7562fSJ. Bruce Fields */ 406f9d7562fSJ. Bruce Fields static void 407f9d7562fSJ. Bruce Fields set_access(unsigned int *access, unsigned long bmap) { 408f9d7562fSJ. Bruce Fields int i; 409f9d7562fSJ. Bruce Fields 410f9d7562fSJ. Bruce Fields *access = 0; 411f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 412f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 413f9d7562fSJ. Bruce Fields *access |= i; 414f9d7562fSJ. Bruce Fields } 415f9d7562fSJ. Bruce Fields } 416f9d7562fSJ. Bruce Fields 417f9d7562fSJ. Bruce Fields static void 418f9d7562fSJ. Bruce Fields set_deny(unsigned int *deny, unsigned long bmap) { 419f9d7562fSJ. Bruce Fields int i; 420f9d7562fSJ. Bruce Fields 421f9d7562fSJ. Bruce Fields *deny = 0; 422f9d7562fSJ. Bruce Fields for (i = 0; i < 4; i++) { 423f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 424f9d7562fSJ. Bruce Fields *deny |= i ; 425f9d7562fSJ. Bruce Fields } 426f9d7562fSJ. Bruce Fields } 427f9d7562fSJ. Bruce Fields 428f9d7562fSJ. Bruce Fields static int 429f9d7562fSJ. Bruce Fields test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 430f9d7562fSJ. Bruce Fields unsigned int access, deny; 431f9d7562fSJ. Bruce Fields 432f9d7562fSJ. Bruce Fields set_access(&access, stp->st_access_bmap); 433f9d7562fSJ. Bruce Fields set_deny(&deny, stp->st_deny_bmap); 434f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 435f9d7562fSJ. Bruce Fields return 0; 436f9d7562fSJ. Bruce Fields return 1; 437f9d7562fSJ. Bruce Fields } 438f9d7562fSJ. Bruce Fields 439f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 440f9d7562fSJ. Bruce Fields { 4418f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 442f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 443f9d7562fSJ. Bruce Fields return O_RDONLY; 444f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 445f9d7562fSJ. Bruce Fields return O_WRONLY; 446f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 447f9d7562fSJ. Bruce Fields return O_RDWR; 448f9d7562fSJ. Bruce Fields } 449f9d7562fSJ. Bruce Fields BUG(); 450f9d7562fSJ. Bruce Fields } 451f9d7562fSJ. Bruce Fields 452f9d7562fSJ. Bruce Fields static int nfs4_access_bmap_to_omode(struct nfs4_stateid *stp) 453f9d7562fSJ. Bruce Fields { 454f9d7562fSJ. Bruce Fields unsigned int access; 455f9d7562fSJ. Bruce Fields 456f9d7562fSJ. Bruce Fields set_access(&access, stp->st_access_bmap); 457f9d7562fSJ. Bruce Fields return nfs4_access_to_omode(access); 458f9d7562fSJ. Bruce Fields } 459f9d7562fSJ. Bruce Fields 4602283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 4612283963fSJ. Bruce Fields { 462f9d7562fSJ. Bruce Fields int oflag = nfs4_access_bmap_to_omode(stp); 463f9d7562fSJ. Bruce Fields 4642283963fSJ. Bruce Fields unhash_generic_stateid(stp); 4652283963fSJ. Bruce Fields release_stateid_lockowners(stp); 466f9d7562fSJ. Bruce Fields nfs4_file_put_access(stp->st_file, oflag); 4672283963fSJ. Bruce Fields free_generic_stateid(stp); 4682283963fSJ. Bruce Fields } 4692283963fSJ. Bruce Fields 470f044ff83SJ. Bruce Fields static void unhash_openowner(struct nfs4_stateowner *sop) 471f1d110caSJ. Bruce Fields { 472f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 473f1d110caSJ. Bruce Fields 474f1d110caSJ. Bruce Fields list_del(&sop->so_idhash); 475f1d110caSJ. Bruce Fields list_del(&sop->so_strhash); 476f1d110caSJ. Bruce Fields list_del(&sop->so_perclient); 477f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); /* XXX: necessary? */ 478f1d110caSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 479f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 480f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 481f1d110caSJ. Bruce Fields release_open_stateid(stp); 482f1d110caSJ. Bruce Fields } 483f1d110caSJ. Bruce Fields } 484f1d110caSJ. Bruce Fields 485f044ff83SJ. Bruce Fields static void release_openowner(struct nfs4_stateowner *sop) 486f1d110caSJ. Bruce Fields { 487f044ff83SJ. Bruce Fields unhash_openowner(sop); 488f1d110caSJ. Bruce Fields list_del(&sop->so_close_lru); 489f1d110caSJ. Bruce Fields nfs4_put_stateowner(sop); 490f1d110caSJ. Bruce Fields } 491f1d110caSJ. Bruce Fields 4925282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 4935282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 4945282fd72SMarc Eshel 4955282fd72SMarc Eshel static inline int 4965282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 4975282fd72SMarc Eshel { 4985282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 4995282fd72SMarc Eshel 5005282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 5015282fd72SMarc Eshel } 5025282fd72SMarc Eshel 5035282fd72SMarc Eshel static inline void 5045282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 5055282fd72SMarc Eshel { 5065282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 5075282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 5085282fd72SMarc Eshel } 5095282fd72SMarc Eshel 510ec6b5d7bSAndy Adamson static void 511ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 512ec6b5d7bSAndy Adamson { 513ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 514ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 515ec6b5d7bSAndy Adamson 516ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 517ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 518ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 519ec6b5d7bSAndy Adamson sid->reserved = 0; 520ec6b5d7bSAndy Adamson } 521ec6b5d7bSAndy Adamson 522ec6b5d7bSAndy Adamson /* 523a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 524a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 525a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 526a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 527a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 528a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 529a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 530a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 531a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 532a649637cSAndy Adamson * for the SEQUENCE op response: 533ec6b5d7bSAndy Adamson */ 534a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 535a649637cSAndy Adamson 536557ce264SAndy Adamson static void 537557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 538557ce264SAndy Adamson { 539557ce264SAndy Adamson int i; 540557ce264SAndy Adamson 541557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 542557ce264SAndy Adamson kfree(ses->se_slots[i]); 543557ce264SAndy Adamson } 544557ce264SAndy Adamson 545efe0cb6dSJ. Bruce Fields /* 546efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 547efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 548efe0cb6dSJ. Bruce Fields */ 549efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 550efe0cb6dSJ. Bruce Fields { 551efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 552efe0cb6dSJ. Bruce Fields } 553efe0cb6dSJ. Bruce Fields 5545b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 555ec6b5d7bSAndy Adamson { 5565b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 5575b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 558ec6b5d7bSAndy Adamson 5595b6feee9SJ. Bruce Fields return size; 560557ce264SAndy Adamson } 561557ce264SAndy Adamson 5625b6feee9SJ. Bruce Fields /* 5635b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 5645b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 5655b6feee9SJ. Bruce Fields * rooom for new connections. For now we just fail the create session. 5665b6feee9SJ. Bruce Fields */ 5675b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 5685b6feee9SJ. Bruce Fields { 5695b6feee9SJ. Bruce Fields int avail; 5705b6feee9SJ. Bruce Fields 5715b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 5725b6feee9SJ. Bruce Fields 5735b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 5745b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 5755b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 5765b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 5775b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 5785b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 5795b6feee9SJ. Bruce Fields 5805b6feee9SJ. Bruce Fields return num; 5815b6feee9SJ. Bruce Fields } 5825b6feee9SJ. Bruce Fields 5835b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 5845b6feee9SJ. Bruce Fields { 5855b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 5865b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 5875b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 5885b6feee9SJ. Bruce Fields } 5895b6feee9SJ. Bruce Fields 5905b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 5915b6feee9SJ. Bruce Fields { 5925b6feee9SJ. Bruce Fields struct nfsd4_session *new; 5935b6feee9SJ. Bruce Fields int mem, i; 594ec6b5d7bSAndy Adamson 595c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 596ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 5975b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 598ec6b5d7bSAndy Adamson 5995b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 6006c18ba9fSAlexandros Batsakis if (!new) 6015b6feee9SJ. Bruce Fields return NULL; 602ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 6035b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 6045b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 6055b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 6065b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 607ec6b5d7bSAndy Adamson goto out_free; 608ec6b5d7bSAndy Adamson } 6095b6feee9SJ. Bruce Fields return new; 6105b6feee9SJ. Bruce Fields out_free: 6115b6feee9SJ. Bruce Fields while (i--) 6125b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 6135b6feee9SJ. Bruce Fields kfree(new); 6145b6feee9SJ. Bruce Fields return NULL; 6155b6feee9SJ. Bruce Fields } 6165b6feee9SJ. Bruce Fields 6175b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 6185b6feee9SJ. Bruce Fields { 6195b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 6205b6feee9SJ. Bruce Fields 6215b6feee9SJ. Bruce Fields new->maxreqs = numslots; 6225b6feee9SJ. Bruce Fields new->maxresp_cached = slotsize + NFSD_MIN_HDR_SEQ_SZ; 6235b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 6245b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 6255b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 6265b6feee9SJ. Bruce Fields } 6275b6feee9SJ. Bruce Fields 62819cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 62919cf5c02SJ. Bruce Fields { 63019cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 63119cf5c02SJ. Bruce Fields kfree(c); 63219cf5c02SJ. Bruce Fields } 63319cf5c02SJ. Bruce Fields 63419cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 63519cf5c02SJ. Bruce Fields { 63619cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 63719cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 63819cf5c02SJ. Bruce Fields 63919cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 64019cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 64119cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 64219cf5c02SJ. Bruce Fields free_conn(c); 64319cf5c02SJ. Bruce Fields } 64419cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 64519cf5c02SJ. Bruce Fields } 64619cf5c02SJ. Bruce Fields 647d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 648c7662518SJ. Bruce Fields { 649c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 650c7662518SJ. Bruce Fields 651c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 652c7662518SJ. Bruce Fields if (!conn) 653db90681dSJ. Bruce Fields return NULL; 654c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 655c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 656d29c374cSJ. Bruce Fields conn->cn_flags = flags; 657db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 658db90681dSJ. Bruce Fields return conn; 659db90681dSJ. Bruce Fields } 660db90681dSJ. Bruce Fields 661328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 662328ead28SJ. Bruce Fields { 663328ead28SJ. Bruce Fields conn->cn_session = ses; 664328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 665328ead28SJ. Bruce Fields } 666328ead28SJ. Bruce Fields 667db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 668db90681dSJ. Bruce Fields { 669db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 670c7662518SJ. Bruce Fields 671c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 672328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 673c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 674db90681dSJ. Bruce Fields } 675c7662518SJ. Bruce Fields 676db90681dSJ. Bruce Fields static void nfsd4_register_conn(struct nfsd4_conn *conn) 677db90681dSJ. Bruce Fields { 67819cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 679db90681dSJ. Bruce Fields register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 680db90681dSJ. Bruce Fields } 681db90681dSJ. Bruce Fields 682db90681dSJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses) 683db90681dSJ. Bruce Fields { 684db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 685d29c374cSJ. Bruce Fields u32 flags = NFS4_CDFC4_FORE; 686db90681dSJ. Bruce Fields 687d29c374cSJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 688d29c374cSJ. Bruce Fields flags |= NFS4_CDFC4_BACK; 689d29c374cSJ. Bruce Fields conn = alloc_conn(rqstp, flags); 690db90681dSJ. Bruce Fields if (!conn) 691db90681dSJ. Bruce Fields return nfserr_jukebox; 692db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 693db90681dSJ. Bruce Fields nfsd4_register_conn(conn); 694c7662518SJ. Bruce Fields return nfs_ok; 695c7662518SJ. Bruce Fields } 696c7662518SJ. Bruce Fields 69719cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 698c7662518SJ. Bruce Fields { 69919cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 70019cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 70119cf5c02SJ. Bruce Fields 70219cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 70319cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 70419cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 70519cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 70619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 70719cf5c02SJ. Bruce Fields 70819cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 70919cf5c02SJ. Bruce Fields free_conn(c); 71019cf5c02SJ. Bruce Fields 71119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 71219cf5c02SJ. Bruce Fields } 71319cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 714c7662518SJ. Bruce Fields } 715c7662518SJ. Bruce Fields 716c7662518SJ. Bruce Fields void free_session(struct kref *kref) 717c7662518SJ. Bruce Fields { 718c7662518SJ. Bruce Fields struct nfsd4_session *ses; 719c7662518SJ. Bruce Fields int mem; 720c7662518SJ. Bruce Fields 721c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 72219cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 723c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 724c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 725c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 726c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 727c7662518SJ. Bruce Fields free_session_slots(ses); 728c7662518SJ. Bruce Fields kfree(ses); 729c7662518SJ. Bruce Fields } 730c7662518SJ. Bruce Fields 731ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 7325b6feee9SJ. Bruce Fields { 7335b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7345b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 7355b6feee9SJ. Bruce Fields int numslots, slotsize; 736c7662518SJ. Bruce Fields int status; 7375b6feee9SJ. Bruce Fields int idx; 7385b6feee9SJ. Bruce Fields 7395b6feee9SJ. Bruce Fields /* 7405b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 7415b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 7425b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 7435b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 7445b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 7455b6feee9SJ. Bruce Fields */ 7465b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 7475b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 7485b6feee9SJ. Bruce Fields 7495b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 7505b6feee9SJ. Bruce Fields if (!new) { 7515b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 752ac7c46f2SJ. Bruce Fields return NULL; 7535b6feee9SJ. Bruce Fields } 7545b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 755ec6b5d7bSAndy Adamson 756ec6b5d7bSAndy Adamson new->se_client = clp; 757ec6b5d7bSAndy Adamson gen_sessionid(new); 758ec6b5d7bSAndy Adamson 759c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 760c7662518SJ. Bruce Fields 761ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 762ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 7638b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 764ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 7655b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 7669089f1b4SBenny Halevy spin_lock(&client_lock); 767ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 768ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 7699089f1b4SBenny Halevy spin_unlock(&client_lock); 770ec6b5d7bSAndy Adamson 771c7662518SJ. Bruce Fields status = nfsd4_new_conn(rqstp, new); 772ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 773c7662518SJ. Bruce Fields if (status) { 774c7662518SJ. Bruce Fields free_session(&new->se_ref); 775ac7c46f2SJ. Bruce Fields return NULL; 776c7662518SJ. Bruce Fields } 777edd76786SJ. Bruce Fields if (!clp->cl_cb_session && (cses->flags & SESSION4_BACK_CHAN)) { 778edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 779edd76786SJ. Bruce Fields 780edd76786SJ. Bruce Fields clp->cl_cb_session = new; 781edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_xprt = rqstp->rq_xprt; 782edd76786SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 783edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 784edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 7855a3c9d71SJ. Bruce Fields nfsd4_probe_callback(clp); 786edd76786SJ. Bruce Fields } 787ac7c46f2SJ. Bruce Fields return new; 788ec6b5d7bSAndy Adamson } 789ec6b5d7bSAndy Adamson 7909089f1b4SBenny Halevy /* caller must hold client_lock */ 7915282fd72SMarc Eshel static struct nfsd4_session * 7925282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 7935282fd72SMarc Eshel { 7945282fd72SMarc Eshel struct nfsd4_session *elem; 7955282fd72SMarc Eshel int idx; 7965282fd72SMarc Eshel 7975282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 7985282fd72SMarc Eshel idx = hash_sessionid(sessionid); 7995282fd72SMarc Eshel /* Search in the appropriate list */ 8005282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 8015282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 8025282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 8035282fd72SMarc Eshel return elem; 8045282fd72SMarc Eshel } 8055282fd72SMarc Eshel } 8065282fd72SMarc Eshel 8075282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 8085282fd72SMarc Eshel return NULL; 8095282fd72SMarc Eshel } 8105282fd72SMarc Eshel 8119089f1b4SBenny Halevy /* caller must hold client_lock */ 8127116ed6bSAndy Adamson static void 8135282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 8147116ed6bSAndy Adamson { 8157116ed6bSAndy Adamson list_del(&ses->se_hash); 8167116ed6bSAndy Adamson list_del(&ses->se_perclnt); 8175282fd72SMarc Eshel } 8185282fd72SMarc Eshel 81936acb66bSBenny Halevy /* must be called under the client_lock */ 8201da177e4SLinus Torvalds static inline void 82136acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 8221da177e4SLinus Torvalds { 82307cd4909SBenny Halevy if (is_client_expired(clp)) { 82407cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 82507cd4909SBenny Halevy __func__, 82607cd4909SBenny Halevy clp->cl_clientid.cl_boot, 82707cd4909SBenny Halevy clp->cl_clientid.cl_id); 82807cd4909SBenny Halevy return; 82907cd4909SBenny Halevy } 83007cd4909SBenny Halevy 8311da177e4SLinus Torvalds /* 8321da177e4SLinus Torvalds * Move client to the end to the LRU list. 8331da177e4SLinus Torvalds */ 8341da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 8351da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 8361da177e4SLinus Torvalds clp->cl_clientid.cl_id); 8371da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 8381da177e4SLinus Torvalds clp->cl_time = get_seconds(); 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds 84136acb66bSBenny Halevy static inline void 84236acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 84336acb66bSBenny Halevy { 84436acb66bSBenny Halevy spin_lock(&client_lock); 84536acb66bSBenny Halevy renew_client_locked(clp); 84636acb66bSBenny Halevy spin_unlock(&client_lock); 84736acb66bSBenny Halevy } 84836acb66bSBenny Halevy 8491da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 8501da177e4SLinus Torvalds static int 8511da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 8521da177e4SLinus Torvalds { 8531da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 8541da177e4SLinus Torvalds return 0; 85560adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 85660adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 8571da177e4SLinus Torvalds return 1; 8581da177e4SLinus Torvalds } 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds /* 8611da177e4SLinus Torvalds * XXX Should we use a slab cache ? 8621da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 8631da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 8641da177e4SLinus Torvalds */ 86535bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 8661da177e4SLinus Torvalds { 8671da177e4SLinus Torvalds struct nfs4_client *clp; 8681da177e4SLinus Torvalds 86935bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 87035bba9a3SJ. Bruce Fields if (clp == NULL) 87135bba9a3SJ. Bruce Fields return NULL; 87235bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 87335bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 87435bba9a3SJ. Bruce Fields kfree(clp); 87535bba9a3SJ. Bruce Fields return NULL; 87635bba9a3SJ. Bruce Fields } 8771da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 8781da177e4SLinus Torvalds clp->cl_name.len = name.len; 8791da177e4SLinus Torvalds return clp; 8801da177e4SLinus Torvalds } 8811da177e4SLinus Torvalds 8821da177e4SLinus Torvalds static inline void 8831da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 8841da177e4SLinus Torvalds { 885792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 886792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 887792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 888792c95ddSJ. Bruce Fields se_perclnt); 889792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 890792c95ddSJ. Bruce Fields nfsd4_put_session(ses); 891792c95ddSJ. Bruce Fields } 8921da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 8931da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 89468e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 8951da177e4SLinus Torvalds kfree(clp->cl_name.data); 8961da177e4SLinus Torvalds kfree(clp); 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds 899d7682988SBenny Halevy void 900d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 901d7682988SBenny Halevy { 902d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 903d7682988SBenny Halevy 904d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 905d7682988SBenny Halevy return; 906d7682988SBenny Halevy if (is_client_expired(clp)) { 907d7682988SBenny Halevy free_client(clp); 908d7682988SBenny Halevy session->se_client = NULL; 909d7682988SBenny Halevy } else 910d7682988SBenny Halevy renew_client_locked(clp); 911d7682988SBenny Halevy spin_unlock(&client_lock); 912d7682988SBenny Halevy } 913d7682988SBenny Halevy 91484d38ac9SBenny Halevy /* must be called under the client_lock */ 91584d38ac9SBenny Halevy static inline void 91684d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 91784d38ac9SBenny Halevy { 918792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 919792c95ddSJ. Bruce Fields 92007cd4909SBenny Halevy mark_client_expired(clp); 92184d38ac9SBenny Halevy list_del(&clp->cl_lru); 922792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 923792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 92484d38ac9SBenny Halevy } 92584d38ac9SBenny Halevy 9261da177e4SLinus Torvalds static void 9271da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 9281da177e4SLinus Torvalds { 9291da177e4SLinus Torvalds struct nfs4_stateowner *sop; 9301da177e4SLinus Torvalds struct nfs4_delegation *dp; 9311da177e4SLinus Torvalds struct list_head reaplist; 9321da177e4SLinus Torvalds 9331da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 9341da177e4SLinus Torvalds spin_lock(&recall_lock); 935ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 936ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 9371da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 9381da177e4SLinus Torvalds dp->dl_flock); 939ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 9401da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 9411da177e4SLinus Torvalds } 9421da177e4SLinus Torvalds spin_unlock(&recall_lock); 9431da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 9441da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 9451da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 9461da177e4SLinus Torvalds unhash_delegation(dp); 9471da177e4SLinus Torvalds } 948ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 949ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 950f044ff83SJ. Bruce Fields release_openowner(sop); 9511da177e4SLinus Torvalds } 9526ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 9532bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 9542bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 95584d38ac9SBenny Halevy list_del(&clp->cl_idhash); 95684d38ac9SBenny Halevy list_del(&clp->cl_strhash); 95784d38ac9SBenny Halevy spin_lock(&client_lock); 95884d38ac9SBenny Halevy unhash_client_locked(clp); 95946583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 960b12a05cbSJ. Bruce Fields free_client(clp); 96146583e25SBenny Halevy spin_unlock(&client_lock); 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds 96435bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 96535bba9a3SJ. Bruce Fields { 96635bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 96735bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 9681da177e4SLinus Torvalds } 9691da177e4SLinus Torvalds 97035bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 97135bba9a3SJ. Bruce Fields { 9721da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 9731da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 9741da177e4SLinus Torvalds } 9751da177e4SLinus Torvalds 97635bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 97735bba9a3SJ. Bruce Fields { 9781da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 9791da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 9801da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 9811da177e4SLinus Torvalds get_group_info(target->cr_group_info); 9821da177e4SLinus Torvalds } 9831da177e4SLinus Torvalds 98435bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 985599e0a22SJ. Bruce Fields { 986a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 9871da177e4SLinus Torvalds } 9881da177e4SLinus Torvalds 9891da177e4SLinus Torvalds static int 990599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 991599e0a22SJ. Bruce Fields { 992599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds static int 996599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 997599e0a22SJ. Bruce Fields { 998599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 9991da177e4SLinus Torvalds } 10001da177e4SLinus Torvalds 10011da177e4SLinus Torvalds /* XXX what about NGROUP */ 10021da177e4SLinus Torvalds static int 1003599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1004599e0a22SJ. Bruce Fields { 1005599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 10061da177e4SLinus Torvalds } 10071da177e4SLinus Torvalds 10085ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 10095ec7b46cSJ. Bruce Fields { 10105ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 10115ec7b46cSJ. Bruce Fields 10121da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 10131da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 10141da177e4SLinus Torvalds } 10151da177e4SLinus Torvalds 1016deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1017deda2faaSJ. Bruce Fields { 1018deda2faaSJ. Bruce Fields static u32 i; 10191da177e4SLinus Torvalds u32 *p; 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 1022deda2faaSJ. Bruce Fields *p++ = get_seconds(); 1023deda2faaSJ. Bruce Fields *p++ = i++; 10241da177e4SLinus Torvalds } 10251da177e4SLinus Torvalds 1026b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1027b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1028b09333c4SRicardo Labiaga { 1029b09333c4SRicardo Labiaga struct nfs4_client *clp; 1030b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1031b09333c4SRicardo Labiaga char *princ; 1032b09333c4SRicardo Labiaga 1033b09333c4SRicardo Labiaga clp = alloc_client(name); 1034b09333c4SRicardo Labiaga if (clp == NULL) 1035b09333c4SRicardo Labiaga return NULL; 1036b09333c4SRicardo Labiaga 1037792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1038792c95ddSJ. Bruce Fields 1039b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1040b09333c4SRicardo Labiaga if (princ) { 1041b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1042b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1043b09333c4SRicardo Labiaga free_client(clp); 1044b09333c4SRicardo Labiaga return NULL; 1045b09333c4SRicardo Labiaga } 1046b09333c4SRicardo Labiaga } 1047b09333c4SRicardo Labiaga 1048b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 104946583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 10502bf23875SJ. Bruce Fields atomic_set(&clp->cl_cb_set, 0); 1051b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1052b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1053b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1054b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1055b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 10566ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1057cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 105807cd4909SBenny Halevy clp->cl_time = get_seconds(); 1059b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1060b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1061b09333c4SRicardo Labiaga copy_verf(clp, verf); 1062b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1063b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1064b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1065b09333c4SRicardo Labiaga gen_confirm(clp); 1066edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1067b09333c4SRicardo Labiaga return clp; 1068b09333c4SRicardo Labiaga } 1069b09333c4SRicardo Labiaga 107035bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 107135bba9a3SJ. Bruce Fields { 10721da177e4SLinus Torvalds if (name.len == 0) 10731da177e4SLinus Torvalds return 0; 10741da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 10752fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 10761da177e4SLinus Torvalds return 0; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds return 1; 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds 1081fd39ca9aSNeilBrown static void 10821da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 10831da177e4SLinus Torvalds { 10841da177e4SLinus Torvalds unsigned int idhashval; 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 10871da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 10881da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 108936acb66bSBenny Halevy renew_client(clp); 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds 1092fd39ca9aSNeilBrown static void 10931da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 10941da177e4SLinus Torvalds { 10951da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 10961da177e4SLinus Torvalds unsigned int strhashval; 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1099f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1100a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1101328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 11021da177e4SLinus Torvalds renew_client(clp); 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds static struct nfs4_client * 11061da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 11071da177e4SLinus Torvalds { 11081da177e4SLinus Torvalds struct nfs4_client *clp; 11091da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1112599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11131da177e4SLinus Torvalds return clp; 11141da177e4SLinus Torvalds } 11151da177e4SLinus Torvalds return NULL; 11161da177e4SLinus Torvalds } 11171da177e4SLinus Torvalds 11181da177e4SLinus Torvalds static struct nfs4_client * 11191da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 11201da177e4SLinus Torvalds { 11211da177e4SLinus Torvalds struct nfs4_client *clp; 11221da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11231da177e4SLinus Torvalds 11241da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1125599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11261da177e4SLinus Torvalds return clp; 11271da177e4SLinus Torvalds } 11281da177e4SLinus Torvalds return NULL; 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds 1131a1bcecd2SAndy Adamson /* 1132a1bcecd2SAndy Adamson * Return 1 iff clp's clientid establishment method matches the use_exchange_id 1133a1bcecd2SAndy Adamson * parameter. Matching is based on the fact the at least one of the 1134a1bcecd2SAndy Adamson * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 1135a1bcecd2SAndy Adamson * 1136a1bcecd2SAndy Adamson * FIXME: we need to unify the clientid namespaces for nfsv4.x 1137a1bcecd2SAndy Adamson * and correctly deal with client upgrade/downgrade in EXCHANGE_ID 1138a1bcecd2SAndy Adamson * and SET_CLIENTID{,_CONFIRM} 1139a1bcecd2SAndy Adamson */ 1140a1bcecd2SAndy Adamson static inline int 1141a1bcecd2SAndy Adamson match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) 1142a1bcecd2SAndy Adamson { 1143a1bcecd2SAndy Adamson bool has_exchange_flags = (clp->cl_exchange_flags != 0); 1144a1bcecd2SAndy Adamson return use_exchange_id == has_exchange_flags; 1145a1bcecd2SAndy Adamson } 1146a1bcecd2SAndy Adamson 114728ce6054SNeilBrown static struct nfs4_client * 1148a1bcecd2SAndy Adamson find_confirmed_client_by_str(const char *dname, unsigned int hashval, 1149a1bcecd2SAndy Adamson bool use_exchange_id) 115028ce6054SNeilBrown { 115128ce6054SNeilBrown struct nfs4_client *clp; 115228ce6054SNeilBrown 115328ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1154a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 1155a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 115628ce6054SNeilBrown return clp; 115728ce6054SNeilBrown } 115828ce6054SNeilBrown return NULL; 115928ce6054SNeilBrown } 116028ce6054SNeilBrown 116128ce6054SNeilBrown static struct nfs4_client * 1162a1bcecd2SAndy Adamson find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, 1163a1bcecd2SAndy Adamson bool use_exchange_id) 116428ce6054SNeilBrown { 116528ce6054SNeilBrown struct nfs4_client *clp; 116628ce6054SNeilBrown 116728ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1168a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 1169a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 117028ce6054SNeilBrown return clp; 117128ce6054SNeilBrown } 117228ce6054SNeilBrown return NULL; 117328ce6054SNeilBrown } 117428ce6054SNeilBrown 1175fd39ca9aSNeilBrown static void 1176fbf4665fSJeff Layton gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) 11771da177e4SLinus Torvalds { 117807263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 11797077ecbaSJeff Layton unsigned short expected_family; 11801da177e4SLinus Torvalds 11817077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 11827077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 11837077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 11847077ecbaSJeff Layton expected_family = AF_INET; 11857077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 11867077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 11877077ecbaSJeff Layton expected_family = AF_INET6; 11887077ecbaSJeff Layton else 11891da177e4SLinus Torvalds goto out_err; 11901da177e4SLinus Torvalds 119107263f1eSJ. Bruce Fields conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, 1192aa9a4ec7SJeff Layton se->se_callback_addr_len, 119307263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 119407263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1195aa9a4ec7SJeff Layton 119607263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 11971da177e4SLinus Torvalds goto out_err; 1198aa9a4ec7SJeff Layton 119907263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 120007263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1201fbf4665fSJeff Layton 120207263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 120307263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 12041da177e4SLinus Torvalds return; 12051da177e4SLinus Torvalds out_err: 120607263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 120707263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1208849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 12091da177e4SLinus Torvalds "will not receive delegations\n", 12101da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 12111da177e4SLinus Torvalds 12121da177e4SLinus Torvalds return; 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds 1215074fe897SAndy Adamson /* 1216557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1217074fe897SAndy Adamson */ 1218074fe897SAndy Adamson void 1219074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1220074fe897SAndy Adamson { 1221557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1222557ce264SAndy Adamson unsigned int base; 1223074fe897SAndy Adamson 1224557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1225074fe897SAndy Adamson 1226557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1227557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1228bf864a31SAndy Adamson 1229bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1230557ce264SAndy Adamson slot->sl_datalen = 0; 1231bf864a31SAndy Adamson return; 1232bf864a31SAndy Adamson } 1233557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1234557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1235557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1236557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1237557ce264SAndy Adamson slot->sl_datalen)) 1238557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1239557ce264SAndy Adamson return; 1240074fe897SAndy Adamson } 1241074fe897SAndy Adamson 1242074fe897SAndy Adamson /* 1243abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1244abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1245abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1246abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1247abfabf8cSAndy Adamson * 1248074fe897SAndy Adamson */ 1249abfabf8cSAndy Adamson static __be32 1250abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1251abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1252074fe897SAndy Adamson { 1253abfabf8cSAndy Adamson struct nfsd4_op *op; 1254abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1255074fe897SAndy Adamson 1256abfabf8cSAndy Adamson dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, 1257557ce264SAndy Adamson resp->opcnt, resp->cstate.slot->sl_cachethis); 1258abfabf8cSAndy Adamson 1259abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1260abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1261abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1262abfabf8cSAndy Adamson 1263abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 1264557ce264SAndy Adamson if (args->opcnt > 1 && slot->sl_cachethis == 0) { 1265abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1266abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1267abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1268074fe897SAndy Adamson } 1269abfabf8cSAndy Adamson return op->status; 1270074fe897SAndy Adamson } 1271074fe897SAndy Adamson 1272074fe897SAndy Adamson /* 1273557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1274557ce264SAndy Adamson * session values. 1275074fe897SAndy Adamson */ 1276074fe897SAndy Adamson __be32 1277bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1278bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1279074fe897SAndy Adamson { 1280557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1281074fe897SAndy Adamson __be32 status; 1282074fe897SAndy Adamson 1283557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1284074fe897SAndy Adamson 1285abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1286abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1287abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1288abfabf8cSAndy Adamson return status; 1289074fe897SAndy Adamson 1290557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1291557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1292074fe897SAndy Adamson 1293557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1294557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1295557ce264SAndy Adamson status = slot->sl_status; 1296074fe897SAndy Adamson 1297074fe897SAndy Adamson return status; 1298074fe897SAndy Adamson } 1299074fe897SAndy Adamson 13000733d213SAndy Adamson /* 13010733d213SAndy Adamson * Set the exchange_id flags returned by the server. 13020733d213SAndy Adamson */ 13030733d213SAndy Adamson static void 13040733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 13050733d213SAndy Adamson { 13060733d213SAndy Adamson /* pNFS is not supported */ 13070733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 13080733d213SAndy Adamson 13090733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 13100733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 13110733d213SAndy Adamson 13120733d213SAndy Adamson /* set the wire flags to return to client. */ 13130733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 13140733d213SAndy Adamson } 13150733d213SAndy Adamson 1316b37ad28bSAl Viro __be32 1317069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1318069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1319069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1320069b6ad4SAndy Adamson { 13210733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 13220733d213SAndy Adamson int status; 13230733d213SAndy Adamson unsigned int strhashval; 13240733d213SAndy Adamson char dname[HEXDIR_LEN]; 1325363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 13260733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1327363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 13280733d213SAndy Adamson 1329363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 13300733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1331363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 13320733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1333363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 13340733d213SAndy Adamson 13350733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 13360733d213SAndy Adamson return nfserr_inval; 13370733d213SAndy Adamson 13380733d213SAndy Adamson /* Currently only support SP4_NONE */ 13390733d213SAndy Adamson switch (exid->spa_how) { 13400733d213SAndy Adamson case SP4_NONE: 13410733d213SAndy Adamson break; 13420733d213SAndy Adamson case SP4_SSV: 13430733d213SAndy Adamson return nfserr_encr_alg_unsupp; 13440733d213SAndy Adamson default: 13450733d213SAndy Adamson BUG(); /* checked by xdr code */ 13460733d213SAndy Adamson case SP4_MACH_CRED: 13470733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 13480733d213SAndy Adamson } 13490733d213SAndy Adamson 13500733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 13510733d213SAndy Adamson 13520733d213SAndy Adamson if (status) 13530733d213SAndy Adamson goto error; 13540733d213SAndy Adamson 13550733d213SAndy Adamson strhashval = clientstr_hashval(dname); 13560733d213SAndy Adamson 13570733d213SAndy Adamson nfs4_lock_state(); 13580733d213SAndy Adamson status = nfs_ok; 13590733d213SAndy Adamson 1360a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, true); 13610733d213SAndy Adamson if (conf) { 13620733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 13630733d213SAndy Adamson /* 18.35.4 case 8 */ 13640733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 13650733d213SAndy Adamson status = nfserr_not_same; 13660733d213SAndy Adamson goto out; 13670733d213SAndy Adamson } 13680733d213SAndy Adamson /* Client reboot: destroy old state */ 13690733d213SAndy Adamson expire_client(conf); 13700733d213SAndy Adamson goto out_new; 13710733d213SAndy Adamson } 13720733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 13730733d213SAndy Adamson /* 18.35.4 case 9 */ 13740733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 13750733d213SAndy Adamson status = nfserr_perm; 13760733d213SAndy Adamson goto out; 13770733d213SAndy Adamson } 13780733d213SAndy Adamson expire_client(conf); 13790733d213SAndy Adamson goto out_new; 13800733d213SAndy Adamson } 13810733d213SAndy Adamson /* 13820733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 13830733d213SAndy Adamson * confirmed client id (18.35.3). 13840733d213SAndy Adamson */ 13850733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 13860733d213SAndy Adamson 13870733d213SAndy Adamson /* 13880733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 13890733d213SAndy Adamson * Leave confirmed record intact and return same result. 13900733d213SAndy Adamson */ 13910733d213SAndy Adamson copy_verf(conf, &verf); 13920733d213SAndy Adamson new = conf; 13930733d213SAndy Adamson goto out_copy; 13946ddbbbfeSMike Sager } 13956ddbbbfeSMike Sager 13960733d213SAndy Adamson /* 18.35.4 case 7 */ 13970733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 13980733d213SAndy Adamson status = nfserr_noent; 13990733d213SAndy Adamson goto out; 14000733d213SAndy Adamson } 14010733d213SAndy Adamson 1402a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, true); 14030733d213SAndy Adamson if (unconf) { 14040733d213SAndy Adamson /* 14050733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 14060733d213SAndy Adamson * a new unconfirmed record should be generated regardless 14070733d213SAndy Adamson * of whether any properties have changed. 14080733d213SAndy Adamson */ 14090733d213SAndy Adamson expire_client(unconf); 14100733d213SAndy Adamson } 14110733d213SAndy Adamson 14120733d213SAndy Adamson out_new: 14130733d213SAndy Adamson /* Normal case */ 1414b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 14150733d213SAndy Adamson if (new == NULL) { 14164731030dSJ. Bruce Fields status = nfserr_jukebox; 14170733d213SAndy Adamson goto out; 14180733d213SAndy Adamson } 14190733d213SAndy Adamson 14200733d213SAndy Adamson gen_clid(new); 14210733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 14220733d213SAndy Adamson out_copy: 14230733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 14240733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 14250733d213SAndy Adamson 142638eb76a5SAndy Adamson exid->seqid = 1; 14270733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 14280733d213SAndy Adamson 14290733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 143049557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 14310733d213SAndy Adamson status = nfs_ok; 14320733d213SAndy Adamson 14330733d213SAndy Adamson out: 14340733d213SAndy Adamson nfs4_unlock_state(); 14350733d213SAndy Adamson error: 14360733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 14370733d213SAndy Adamson return status; 1438069b6ad4SAndy Adamson } 1439069b6ad4SAndy Adamson 1440b85d4c01SBenny Halevy static int 144188e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1442b85d4c01SBenny Halevy { 144388e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 144488e588d5SAndy Adamson slot_seqid); 1445b85d4c01SBenny Halevy 1446b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 144788e588d5SAndy Adamson if (slot_inuse) { 144888e588d5SAndy Adamson if (seqid == slot_seqid) 1449b85d4c01SBenny Halevy return nfserr_jukebox; 1450b85d4c01SBenny Halevy else 1451b85d4c01SBenny Halevy return nfserr_seq_misordered; 1452b85d4c01SBenny Halevy } 1453b85d4c01SBenny Halevy /* Normal */ 145488e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1455b85d4c01SBenny Halevy return nfs_ok; 1456b85d4c01SBenny Halevy /* Replay */ 145788e588d5SAndy Adamson if (seqid == slot_seqid) 1458b85d4c01SBenny Halevy return nfserr_replay_cache; 1459b85d4c01SBenny Halevy /* Wraparound */ 146088e588d5SAndy Adamson if (seqid == 1 && (slot_seqid + 1) == 0) 1461b85d4c01SBenny Halevy return nfs_ok; 1462b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1463b85d4c01SBenny Halevy return nfserr_seq_misordered; 1464b85d4c01SBenny Halevy } 1465b85d4c01SBenny Halevy 146649557cc7SAndy Adamson /* 146749557cc7SAndy Adamson * Cache the create session result into the create session single DRC 146849557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 146949557cc7SAndy Adamson * Do this for solo or embedded create session operations. 147049557cc7SAndy Adamson */ 147149557cc7SAndy Adamson static void 147249557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 147349557cc7SAndy Adamson struct nfsd4_clid_slot *slot, int nfserr) 147449557cc7SAndy Adamson { 147549557cc7SAndy Adamson slot->sl_status = nfserr; 147649557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 147749557cc7SAndy Adamson } 147849557cc7SAndy Adamson 147949557cc7SAndy Adamson static __be32 148049557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 148149557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 148249557cc7SAndy Adamson { 148349557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 148449557cc7SAndy Adamson return slot->sl_status; 148549557cc7SAndy Adamson } 148649557cc7SAndy Adamson 1487069b6ad4SAndy Adamson __be32 1488069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1489069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1490069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1491069b6ad4SAndy Adamson { 1492363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1493ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1494ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 149549557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 149686c3e16cSJ. Bruce Fields bool confirm_me = false; 1497ec6b5d7bSAndy Adamson int status = 0; 1498ec6b5d7bSAndy Adamson 1499ec6b5d7bSAndy Adamson nfs4_lock_state(); 1500ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1501ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1502ec6b5d7bSAndy Adamson 1503ec6b5d7bSAndy Adamson if (conf) { 150449557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 150549557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 150638eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1507ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 150849557cc7SAndy Adamson cs_slot->sl_seqid); 150938eb76a5SAndy Adamson /* Return the cached reply status */ 151049557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 151138eb76a5SAndy Adamson goto out; 151249557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1513ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1514ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1515ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 151649557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1517ec6b5d7bSAndy Adamson goto out; 1518ec6b5d7bSAndy Adamson } 1519ec6b5d7bSAndy Adamson } else if (unconf) { 1520ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1521363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1522ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1523ec6b5d7bSAndy Adamson goto out; 1524ec6b5d7bSAndy Adamson } 1525ec6b5d7bSAndy Adamson 152649557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 152749557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 152838eb76a5SAndy Adamson if (status) { 152938eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1530ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1531cd5b8144SJ. Bruce Fields goto out; 1532ec6b5d7bSAndy Adamson } 1533ec6b5d7bSAndy Adamson 153486c3e16cSJ. Bruce Fields confirm_me = true; 1535ec6b5d7bSAndy Adamson conf = unconf; 1536ec6b5d7bSAndy Adamson } else { 1537ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1538ec6b5d7bSAndy Adamson goto out; 1539ec6b5d7bSAndy Adamson } 1540ec6b5d7bSAndy Adamson 1541408b79bcSJ. Bruce Fields /* 15428323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 15438323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 15448323c3b2SJ. Bruce Fields */ 15458323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 15468323c3b2SJ. Bruce Fields /* 1547408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1548408b79bcSJ. Bruce Fields */ 1549408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1550408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1551408b79bcSJ. Bruce Fields 1552ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1553ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1554ac7c46f2SJ. Bruce Fields if (!new) 1555ec6b5d7bSAndy Adamson goto out; 1556ac7c46f2SJ. Bruce Fields status = nfs_ok; 1557ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1558ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 155986c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 156049557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1561ec6b5d7bSAndy Adamson 156249557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 156349557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 156486c3e16cSJ. Bruce Fields if (confirm_me) 156586c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1566ec6b5d7bSAndy Adamson out: 1567ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1568ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1569ec6b5d7bSAndy Adamson return status; 1570069b6ad4SAndy Adamson } 1571069b6ad4SAndy Adamson 157257716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 157357716355SJ. Bruce Fields { 157457716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 157557716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 157657716355SJ. Bruce Fields 157757716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 157857716355SJ. Bruce Fields } 157957716355SJ. Bruce Fields 15805d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 15815d4cec2fSJ. Bruce Fields { 15825d4cec2fSJ. Bruce Fields if (!session) 15835d4cec2fSJ. Bruce Fields return 0; 15845d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 15855d4cec2fSJ. Bruce Fields } 15865d4cec2fSJ. Bruce Fields 1587069b6ad4SAndy Adamson __be32 1588069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1589069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1590069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1591069b6ad4SAndy Adamson { 1592e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1593e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1594e10e0cfcSBenny Halevy 1595e10e0cfcSBenny Halevy /* Notes: 1596e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1597e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1598e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1599e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1600e10e0cfcSBenny Halevy */ 1601e10e0cfcSBenny Halevy 16025d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 160357716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 160457716355SJ. Bruce Fields return nfserr_not_only_op; 160557716355SJ. Bruce Fields } 1606e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 16079089f1b4SBenny Halevy spin_lock(&client_lock); 1608e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1609e10e0cfcSBenny Halevy if (!ses) { 16109089f1b4SBenny Halevy spin_unlock(&client_lock); 1611e10e0cfcSBenny Halevy goto out; 1612e10e0cfcSBenny Halevy } 1613e10e0cfcSBenny Halevy 1614e10e0cfcSBenny Halevy unhash_session(ses); 16159089f1b4SBenny Halevy spin_unlock(&client_lock); 1616e10e0cfcSBenny Halevy 1617ab707e15SBenny Halevy nfs4_lock_state(); 1618e10e0cfcSBenny Halevy /* wait for callbacks */ 16196ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(ses->se_client); 1620ab707e15SBenny Halevy nfs4_unlock_state(); 162119cf5c02SJ. Bruce Fields 162219cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 162319cf5c02SJ. Bruce Fields 1624e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1625e10e0cfcSBenny Halevy status = nfs_ok; 1626e10e0cfcSBenny Halevy out: 1627e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1628e10e0cfcSBenny Halevy return status; 1629069b6ad4SAndy Adamson } 1630069b6ad4SAndy Adamson 1631a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1632328ead28SJ. Bruce Fields { 1633328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1634328ead28SJ. Bruce Fields 1635328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1636a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1637328ead28SJ. Bruce Fields return c; 1638328ead28SJ. Bruce Fields } 1639328ead28SJ. Bruce Fields } 1640328ead28SJ. Bruce Fields return NULL; 1641328ead28SJ. Bruce Fields } 1642328ead28SJ. Bruce Fields 1643a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1644328ead28SJ. Bruce Fields { 1645328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1646a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 1647328ead28SJ. Bruce Fields 1648328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1649a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1650328ead28SJ. Bruce Fields if (c) { 1651328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1652328ead28SJ. Bruce Fields free_conn(new); 1653328ead28SJ. Bruce Fields return; 1654328ead28SJ. Bruce Fields } 1655328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1656328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1657328ead28SJ. Bruce Fields nfsd4_register_conn(new); 1658328ead28SJ. Bruce Fields return; 1659328ead28SJ. Bruce Fields } 1660328ead28SJ. Bruce Fields 1661069b6ad4SAndy Adamson __be32 1662b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1663069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1664069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1665069b6ad4SAndy Adamson { 1666f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1667b85d4c01SBenny Halevy struct nfsd4_session *session; 1668b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1669a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 1670b85d4c01SBenny Halevy int status; 1671b85d4c01SBenny Halevy 1672f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1673f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1674f9bb94c4SAndy Adamson 1675a663bdd8SJ. Bruce Fields /* 1676a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1677a663bdd8SJ. Bruce Fields * below. 1678a663bdd8SJ. Bruce Fields */ 1679a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1680a663bdd8SJ. Bruce Fields if (!conn) 1681a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1682a663bdd8SJ. Bruce Fields 16839089f1b4SBenny Halevy spin_lock(&client_lock); 1684b85d4c01SBenny Halevy status = nfserr_badsession; 1685b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1686b85d4c01SBenny Halevy if (!session) 1687b85d4c01SBenny Halevy goto out; 1688b85d4c01SBenny Halevy 1689b85d4c01SBenny Halevy status = nfserr_badslot; 16906c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1691b85d4c01SBenny Halevy goto out; 1692b85d4c01SBenny Halevy 1693557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1694b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1695b85d4c01SBenny Halevy 1696a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1697a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1698a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1699a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1700a8dfdaebSAndy Adamson 170188e588d5SAndy Adamson status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); 1702b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1703b85d4c01SBenny Halevy cstate->slot = slot; 1704b85d4c01SBenny Halevy cstate->session = session; 1705da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1706557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1707bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1708da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1709aaf84eb9SBenny Halevy goto out; 1710b85d4c01SBenny Halevy } 1711b85d4c01SBenny Halevy if (status) 1712b85d4c01SBenny Halevy goto out; 1713b85d4c01SBenny Halevy 1714a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 1715a663bdd8SJ. Bruce Fields conn = NULL; 1716328ead28SJ. Bruce Fields 1717b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1718b85d4c01SBenny Halevy slot->sl_inuse = true; 1719b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1720557ce264SAndy Adamson slot->sl_cachethis = seq->cachethis; 1721b85d4c01SBenny Halevy 1722b85d4c01SBenny Halevy cstate->slot = slot; 1723b85d4c01SBenny Halevy cstate->session = session; 1724b85d4c01SBenny Halevy 1725b85d4c01SBenny Halevy out: 172626c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 1727aaf84eb9SBenny Halevy if (cstate->session) { 172836acb66bSBenny Halevy nfsd4_get_session(cstate->session); 1729d7682988SBenny Halevy atomic_inc(&session->se_client->cl_refcount); 1730aaf84eb9SBenny Halevy } 1731a663bdd8SJ. Bruce Fields kfree(conn); 173236acb66bSBenny Halevy spin_unlock(&client_lock); 1733b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1734b85d4c01SBenny Halevy return status; 1735069b6ad4SAndy Adamson } 1736069b6ad4SAndy Adamson 1737069b6ad4SAndy Adamson __be32 17384dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 17394dc6ec00SJ. Bruce Fields { 17404dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 17414dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 17424dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 17434dc6ec00SJ. Bruce Fields /* 17444dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 17454dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 17464dc6ec00SJ. Bruce Fields */ 17474dc6ec00SJ. Bruce Fields return nfs_ok; 17484dc6ec00SJ. Bruce Fields } 17494dc6ec00SJ. Bruce Fields nfs4_lock_state(); 17504dc6ec00SJ. Bruce Fields if (is_client_expired(cstate->session->se_client)) { 17514dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 17524dc6ec00SJ. Bruce Fields /* 17534dc6ec00SJ. Bruce Fields * The following error isn't really legal. 17544dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 17554dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 17564dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 17574dc6ec00SJ. Bruce Fields * client. 17584dc6ec00SJ. Bruce Fields */ 17594dc6ec00SJ. Bruce Fields return nfserr_stale_clientid; 17604dc6ec00SJ. Bruce Fields } 17614dc6ec00SJ. Bruce Fields nfsd4_create_clid_dir(cstate->session->se_client); 17624dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 17634dc6ec00SJ. Bruce Fields return nfs_ok; 17644dc6ec00SJ. Bruce Fields } 17654dc6ec00SJ. Bruce Fields 17664dc6ec00SJ. Bruce Fields __be32 1767b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1768b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 17691da177e4SLinus Torvalds { 1770363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 17711da177e4SLinus Torvalds struct xdr_netobj clname = { 17721da177e4SLinus Torvalds .len = setclid->se_namelen, 17731da177e4SLinus Torvalds .data = setclid->se_name, 17741da177e4SLinus Torvalds }; 17751da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 17761da177e4SLinus Torvalds unsigned int strhashval; 177728ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1778b37ad28bSAl Viro __be32 status; 1779a55370a3SNeilBrown char dname[HEXDIR_LEN]; 17801da177e4SLinus Torvalds 17811da177e4SLinus Torvalds if (!check_name(clname)) 178273aea4ecSNeil Brown return nfserr_inval; 17831da177e4SLinus Torvalds 1784a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1785a55370a3SNeilBrown if (status) 178673aea4ecSNeil Brown return status; 1787a55370a3SNeilBrown 17881da177e4SLinus Torvalds /* 17891da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 17901da177e4SLinus Torvalds * We get here on a DRC miss. 17911da177e4SLinus Torvalds */ 17921da177e4SLinus Torvalds 1793a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 17941da177e4SLinus Torvalds 17951da177e4SLinus Torvalds nfs4_lock_state(); 1796a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, false); 179728ce6054SNeilBrown if (conf) { 1798a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 17991da177e4SLinus Torvalds status = nfserr_clid_inuse; 1800026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1801363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 1802363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 1803363168b4SJeff Layton sizeof(addr_str)); 1804026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 1805363168b4SJeff Layton "at %s\n", addr_str); 18061da177e4SLinus Torvalds goto out; 18071da177e4SLinus Torvalds } 18081da177e4SLinus Torvalds } 1809a186e767SJ. Bruce Fields /* 1810a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1811a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1812a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1813a186e767SJ. Bruce Fields */ 1814a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, false); 18151da177e4SLinus Torvalds status = nfserr_resource; 18161da177e4SLinus Torvalds if (!conf) { 18171da177e4SLinus Torvalds /* 1818a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1819a186e767SJ. Bruce Fields * placed first, because it is the normal case 18201da177e4SLinus Torvalds */ 18211da177e4SLinus Torvalds if (unconf) 18221da177e4SLinus Torvalds expire_client(unconf); 1823b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1824a55370a3SNeilBrown if (new == NULL) 18251da177e4SLinus Torvalds goto out; 18261da177e4SLinus Torvalds gen_clid(new); 1827599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 18281da177e4SLinus Torvalds /* 1829a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1830a186e767SJ. Bruce Fields * probable callback update 18311da177e4SLinus Torvalds */ 183231f4a6c1SNeilBrown if (unconf) { 183331f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 183431f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 183531f4a6c1SNeilBrown * This has the advantage that there is at most 183631f4a6c1SNeilBrown * one {*x***} in either list at any time. 183731f4a6c1SNeilBrown */ 18381da177e4SLinus Torvalds expire_client(unconf); 18391da177e4SLinus Torvalds } 1840b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1841a55370a3SNeilBrown if (new == NULL) 18421da177e4SLinus Torvalds goto out; 18431da177e4SLinus Torvalds copy_clid(new, conf); 18441da177e4SLinus Torvalds } else if (!unconf) { 18451da177e4SLinus Torvalds /* 1846a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 1847a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1848a186e767SJ. Bruce Fields * confirmed. 18491da177e4SLinus Torvalds */ 1850b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1851a55370a3SNeilBrown if (new == NULL) 18521da177e4SLinus Torvalds goto out; 18531da177e4SLinus Torvalds gen_clid(new); 185449ba8781SJ. Bruce Fields } else { 18551da177e4SLinus Torvalds /* 1856a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 1857a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1858a186e767SJ. Bruce Fields * confirmed. 18591da177e4SLinus Torvalds */ 18601da177e4SLinus Torvalds expire_client(unconf); 1861b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1862a55370a3SNeilBrown if (new == NULL) 18631da177e4SLinus Torvalds goto out; 18641da177e4SLinus Torvalds gen_clid(new); 18651da177e4SLinus Torvalds } 18668323c3b2SJ. Bruce Fields /* 18678323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 18688323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 18698323c3b2SJ. Bruce Fields */ 18708323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 1871fbf4665fSJeff Layton gen_callback(new, setclid, rpc_get_scope_id(sa)); 1872c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 18731da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 18741da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 18751da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 18761da177e4SLinus Torvalds status = nfs_ok; 18771da177e4SLinus Torvalds out: 18781da177e4SLinus Torvalds nfs4_unlock_state(); 18791da177e4SLinus Torvalds return status; 18801da177e4SLinus Torvalds } 18811da177e4SLinus Torvalds 18821da177e4SLinus Torvalds 18831da177e4SLinus Torvalds /* 1884a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 1885a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 1886a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 18871da177e4SLinus Torvalds */ 1888b37ad28bSAl Viro __be32 1889b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 1890b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 1891b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 18921da177e4SLinus Torvalds { 1893363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 189421ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 18951da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 18961da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 1897b37ad28bSAl Viro __be32 status; 18981da177e4SLinus Torvalds 18991da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 19001da177e4SLinus Torvalds return nfserr_stale_clientid; 19011da177e4SLinus Torvalds /* 19021da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 19031da177e4SLinus Torvalds * We get here on a DRC miss. 19041da177e4SLinus Torvalds */ 19051da177e4SLinus Torvalds 19061da177e4SLinus Torvalds nfs4_lock_state(); 190721ab45a4SNeilBrown 190821ab45a4SNeilBrown conf = find_confirmed_client(clid); 190921ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 191021ab45a4SNeilBrown 191122de4d83SNeilBrown status = nfserr_clid_inuse; 1912363168b4SJeff Layton if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) 19131da177e4SLinus Torvalds goto out; 1914363168b4SJeff Layton if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) 19151da177e4SLinus Torvalds goto out; 191621ab45a4SNeilBrown 1917a186e767SJ. Bruce Fields /* 1918a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 1919a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 1920a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 1921a186e767SJ. Bruce Fields */ 1922366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 1923a186e767SJ. Bruce Fields /* 1924a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 1925a186e767SJ. Bruce Fields * callback update 19267c79f737SNeilBrown */ 1927599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 19281da177e4SLinus Torvalds status = nfserr_clid_inuse; 19291da177e4SLinus Torvalds else { 19302bf23875SJ. Bruce Fields atomic_set(&conf->cl_cb_set, 0); 19315a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 19325a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 19331a69c179SNeilBrown expire_client(unconf); 19341da177e4SLinus Torvalds status = nfs_ok; 19351a69c179SNeilBrown 19361da177e4SLinus Torvalds } 1937f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 1938a186e767SJ. Bruce Fields /* 1939a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 1940a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 1941a186e767SJ. Bruce Fields * do nothing. 19427c79f737SNeilBrown */ 1943599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 19441da177e4SLinus Torvalds status = nfserr_clid_inuse; 194521ab45a4SNeilBrown else 19461da177e4SLinus Torvalds status = nfs_ok; 19477c79f737SNeilBrown } else if (!conf && unconf 1948599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 1949a186e767SJ. Bruce Fields /* 1950a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 1951a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 19521da177e4SLinus Torvalds */ 1953599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 19541da177e4SLinus Torvalds status = nfserr_clid_inuse; 19551da177e4SLinus Torvalds } else { 19561a69c179SNeilBrown unsigned int hash = 19571a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 19581a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 1959a1bcecd2SAndy Adamson hash, false); 19601a69c179SNeilBrown if (conf) { 1961c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 19621a69c179SNeilBrown expire_client(conf); 19631a69c179SNeilBrown } 19641da177e4SLinus Torvalds move_to_confirmed(unconf); 196521ab45a4SNeilBrown conf = unconf; 19665a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 19671a69c179SNeilBrown status = nfs_ok; 19681da177e4SLinus Torvalds } 1969599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 1970599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 19717c79f737SNeilBrown &confirm)))) { 1972a186e767SJ. Bruce Fields /* 1973a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 1974a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 19751da177e4SLinus Torvalds */ 19761da177e4SLinus Torvalds status = nfserr_stale_clientid; 19777c79f737SNeilBrown } else { 19781da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 197922de4d83SNeilBrown status = nfserr_clid_inuse; 198008e8987cSNeilBrown } 19811da177e4SLinus Torvalds out: 19821da177e4SLinus Torvalds nfs4_unlock_state(); 19831da177e4SLinus Torvalds return status; 19841da177e4SLinus Torvalds } 19851da177e4SLinus Torvalds 19861da177e4SLinus Torvalds /* OPEN Share state helper functions */ 19871da177e4SLinus Torvalds static inline struct nfs4_file * 19881da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 19891da177e4SLinus Torvalds { 19901da177e4SLinus Torvalds struct nfs4_file *fp; 19911da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 19921da177e4SLinus Torvalds 1993e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 1994e60d4398SNeilBrown if (fp) { 19958b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 19961da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 19978beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 19988beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 19991da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 20001da177e4SLinus Torvalds fp->fi_id = current_fileid++; 200147f9940cSMeelap Shah fp->fi_had_conflict = false; 2002f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2003f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 200447cee541SPavel Emelyanov spin_lock(&recall_lock); 200547cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 200647cee541SPavel Emelyanov spin_unlock(&recall_lock); 20071da177e4SLinus Torvalds return fp; 20081da177e4SLinus Torvalds } 20091da177e4SLinus Torvalds return NULL; 20101da177e4SLinus Torvalds } 20111da177e4SLinus Torvalds 20121da177e4SLinus Torvalds static void 2013e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2014e60d4398SNeilBrown { 2015e60d4398SNeilBrown if (*slab == NULL) 2016e60d4398SNeilBrown return; 20171a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2018e60d4398SNeilBrown *slab = NULL; 2019e60d4398SNeilBrown } 2020e60d4398SNeilBrown 2021e8ff2a84SJ. Bruce Fields void 2022e60d4398SNeilBrown nfsd4_free_slabs(void) 2023e60d4398SNeilBrown { 2024e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 2025e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 20265ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 20275b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2028e60d4398SNeilBrown } 20291da177e4SLinus Torvalds 20301da177e4SLinus Torvalds static int 20311da177e4SLinus Torvalds nfsd4_init_slabs(void) 20321da177e4SLinus Torvalds { 20331da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 203420c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 2035e60d4398SNeilBrown if (stateowner_slab == NULL) 2036e60d4398SNeilBrown goto out_nomem; 2037e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 203820c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2039e60d4398SNeilBrown if (file_slab == NULL) 2040e60d4398SNeilBrown goto out_nomem; 20415ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 204220c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 20435ac049acSNeilBrown if (stateid_slab == NULL) 20445ac049acSNeilBrown goto out_nomem; 20455b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 204620c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 20475b2d21c1SNeilBrown if (deleg_slab == NULL) 20485b2d21c1SNeilBrown goto out_nomem; 2049e60d4398SNeilBrown return 0; 2050e60d4398SNeilBrown out_nomem: 2051e60d4398SNeilBrown nfsd4_free_slabs(); 20521da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 20531da177e4SLinus Torvalds return -ENOMEM; 20541da177e4SLinus Torvalds } 20551da177e4SLinus Torvalds 20561da177e4SLinus Torvalds void 20571da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 20581da177e4SLinus Torvalds { 20591da177e4SLinus Torvalds struct nfs4_stateowner *sop = 20601da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 20611da177e4SLinus Torvalds kfree(sop->so_owner.data); 20621da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 20631da177e4SLinus Torvalds } 20641da177e4SLinus Torvalds 20651da177e4SLinus Torvalds static inline struct nfs4_stateowner * 20661da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 20671da177e4SLinus Torvalds { 20681da177e4SLinus Torvalds struct nfs4_stateowner *sop; 20691da177e4SLinus Torvalds 20701da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 20711da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 20721da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 20731da177e4SLinus Torvalds sop->so_owner.len = owner->len; 20741da177e4SLinus Torvalds kref_init(&sop->so_ref); 20751da177e4SLinus Torvalds return sop; 20761da177e4SLinus Torvalds } 20771da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 20781da177e4SLinus Torvalds } 20791da177e4SLinus Torvalds return NULL; 20801da177e4SLinus Torvalds } 20811da177e4SLinus Torvalds 20821da177e4SLinus Torvalds static struct nfs4_stateowner * 20831da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 20841da177e4SLinus Torvalds struct nfs4_stateowner *sop; 20851da177e4SLinus Torvalds struct nfs4_replay *rp; 20861da177e4SLinus Torvalds unsigned int idhashval; 20871da177e4SLinus Torvalds 20881da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 20891da177e4SLinus Torvalds return NULL; 20901da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 20911da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 20921da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 20931da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2094ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2095ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 20961da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 20971da177e4SLinus Torvalds sop->so_time = 0; 20981da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 20991da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 2100ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 21011da177e4SLinus Torvalds sop->so_is_open_owner = 1; 21021da177e4SLinus Torvalds sop->so_id = current_ownerid++; 21031da177e4SLinus Torvalds sop->so_client = clp; 21041da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 21051da177e4SLinus Torvalds sop->so_confirmed = 0; 21061da177e4SLinus Torvalds rp = &sop->so_replay; 2107de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 21081da177e4SLinus Torvalds rp->rp_buflen = 0; 21091da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 21101da177e4SLinus Torvalds return sop; 21111da177e4SLinus Torvalds } 21121da177e4SLinus Torvalds 21131da177e4SLinus Torvalds static inline void 21141da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 21151da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 21161da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 21171da177e4SLinus Torvalds 21181da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 2119ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2120ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 21211da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 21221da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 2123ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 21248beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 21251da177e4SLinus Torvalds stp->st_stateowner = sop; 212613cd2184SNeilBrown get_nfs4_file(fp); 21271da177e4SLinus Torvalds stp->st_file = fp; 2128e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 21291da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 21301da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 21311da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 21321da177e4SLinus Torvalds stp->st_access_bmap = 0; 21331da177e4SLinus Torvalds stp->st_deny_bmap = 0; 213484459a11SAndy Adamson __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, 213584459a11SAndy Adamson &stp->st_access_bmap); 21361da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 21374c4cd222SNeilBrown stp->st_openstp = NULL; 21381da177e4SLinus Torvalds } 21391da177e4SLinus Torvalds 21401da177e4SLinus Torvalds static void 21411da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 21421da177e4SLinus Torvalds { 21431da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 21441da177e4SLinus Torvalds 2145358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 21461da177e4SLinus Torvalds sop->so_time = get_seconds(); 21471da177e4SLinus Torvalds } 21481da177e4SLinus Torvalds 21491da177e4SLinus Torvalds static int 2150599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2151599e0a22SJ. Bruce Fields clientid_t *clid) 2152599e0a22SJ. Bruce Fields { 2153599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2154599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2155599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 21561da177e4SLinus Torvalds } 21571da177e4SLinus Torvalds 21581da177e4SLinus Torvalds static struct nfs4_stateowner * 21591da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 21601da177e4SLinus Torvalds { 21611da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 21621da177e4SLinus Torvalds 21631da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 2164599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 21651da177e4SLinus Torvalds return so; 21661da177e4SLinus Torvalds } 21671da177e4SLinus Torvalds return NULL; 21681da177e4SLinus Torvalds } 21691da177e4SLinus Torvalds 21701da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 21711da177e4SLinus Torvalds static struct nfs4_file * 21721da177e4SLinus Torvalds find_file(struct inode *ino) 21731da177e4SLinus Torvalds { 21741da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 21751da177e4SLinus Torvalds struct nfs4_file *fp; 21761da177e4SLinus Torvalds 21778b671b80SJ. Bruce Fields spin_lock(&recall_lock); 21781da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 217913cd2184SNeilBrown if (fp->fi_inode == ino) { 218013cd2184SNeilBrown get_nfs4_file(fp); 21818b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 21821da177e4SLinus Torvalds return fp; 21831da177e4SLinus Torvalds } 218413cd2184SNeilBrown } 21858b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 21861da177e4SLinus Torvalds return NULL; 21871da177e4SLinus Torvalds } 21881da177e4SLinus Torvalds 2189d87a8adeSAndy Adamson static inline int access_valid(u32 x, u32 minorversion) 2190ba5a6a19SJ. Bruce Fields { 2191d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) 21928838dc43SJ. Bruce Fields return 0; 2193d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) 2194d87a8adeSAndy Adamson return 0; 2195d87a8adeSAndy Adamson x &= ~NFS4_SHARE_ACCESS_MASK; 2196d87a8adeSAndy Adamson if (minorversion && x) { 2197d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) 2198d87a8adeSAndy Adamson return 0; 2199d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) 2200d87a8adeSAndy Adamson return 0; 2201d87a8adeSAndy Adamson x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); 2202d87a8adeSAndy Adamson } 2203d87a8adeSAndy Adamson if (x) 22048838dc43SJ. Bruce Fields return 0; 22058838dc43SJ. Bruce Fields return 1; 2206ba5a6a19SJ. Bruce Fields } 2207ba5a6a19SJ. Bruce Fields 22088838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 2209ba5a6a19SJ. Bruce Fields { 22108838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 22118838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 2212ba5a6a19SJ. Bruce Fields } 22131da177e4SLinus Torvalds 22144f83aa30SJ. Bruce Fields /* 22151da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 22161da177e4SLinus Torvalds * WRITE with all zero or all one stateid 22171da177e4SLinus Torvalds */ 2218b37ad28bSAl Viro static __be32 22191da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 22201da177e4SLinus Torvalds { 22211da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 22221da177e4SLinus Torvalds struct nfs4_file *fp; 22231da177e4SLinus Torvalds struct nfs4_stateid *stp; 2224b37ad28bSAl Viro __be32 ret; 22251da177e4SLinus Torvalds 22261da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 22271da177e4SLinus Torvalds 22281da177e4SLinus Torvalds fp = find_file(ino); 222913cd2184SNeilBrown if (!fp) 223013cd2184SNeilBrown return nfs_ok; 2231b700949bSNeilBrown ret = nfserr_locked; 22321da177e4SLinus Torvalds /* Search for conflicting share reservations */ 22338beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 22341da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 22351da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 223613cd2184SNeilBrown goto out; 22371da177e4SLinus Torvalds } 223813cd2184SNeilBrown ret = nfs_ok; 223913cd2184SNeilBrown out: 224013cd2184SNeilBrown put_nfs4_file(fp); 224113cd2184SNeilBrown return ret; 22421da177e4SLinus Torvalds } 22431da177e4SLinus Torvalds 22441da177e4SLinus Torvalds static inline void 2245f9d7562fSJ. Bruce Fields nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access) 22461da177e4SLinus Torvalds { 2247f9d7562fSJ. Bruce Fields if (share_access & NFS4_SHARE_ACCESS_WRITE) 2248f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, O_WRONLY); 2249f9d7562fSJ. Bruce Fields if (share_access & NFS4_SHARE_ACCESS_READ) 2250f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, O_RDONLY); 22511da177e4SLinus Torvalds } 22521da177e4SLinus Torvalds 22531da177e4SLinus Torvalds /* 22541da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 22551da177e4SLinus Torvalds * by the lease (file_lock) 22561da177e4SLinus Torvalds * 22571da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 22581da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 22591da177e4SLinus Torvalds * lease. 22601da177e4SLinus Torvalds */ 22611da177e4SLinus Torvalds static 22621da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 22631da177e4SLinus Torvalds { 22641da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 22651da177e4SLinus Torvalds 22661da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 22671da177e4SLinus Torvalds if (!dp) 22681da177e4SLinus Torvalds return; 22691da177e4SLinus Torvalds 22701da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 22711da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 22721da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 22731da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 22741da177e4SLinus Torvalds * it's safe to take a reference: */ 22751da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 22761da177e4SLinus Torvalds 22771da177e4SLinus Torvalds spin_lock(&recall_lock); 22781da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 22791da177e4SLinus Torvalds spin_unlock(&recall_lock); 22801da177e4SLinus Torvalds 22811da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 22821da177e4SLinus Torvalds dp->dl_time = get_seconds(); 22831da177e4SLinus Torvalds 22840272e1fdSJ. Bruce Fields /* 22850272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 22860272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 22870272e1fdSJ. Bruce Fields * in time. 22880272e1fdSJ. Bruce Fields */ 22890272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 22901da177e4SLinus Torvalds 229163e4863fSJ. Bruce Fields dp->dl_file->fi_had_conflict = true; 229263e4863fSJ. Bruce Fields nfsd4_cb_recall(dp); 22931da177e4SLinus Torvalds } 22941da177e4SLinus Torvalds 22951da177e4SLinus Torvalds /* 22961da177e4SLinus Torvalds * The file_lock is being reapd. 22971da177e4SLinus Torvalds * 22981da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 22991da177e4SLinus Torvalds */ 23001da177e4SLinus Torvalds static 23011da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 23021da177e4SLinus Torvalds { 23031da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 23041da177e4SLinus Torvalds 23051da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 23061da177e4SLinus Torvalds 23071da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 23081da177e4SLinus Torvalds return; 23091da177e4SLinus Torvalds dp->dl_flock = NULL; 23101da177e4SLinus Torvalds } 23111da177e4SLinus Torvalds 23121da177e4SLinus Torvalds /* 2313a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 23141da177e4SLinus Torvalds */ 23151da177e4SLinus Torvalds static 23161da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 23171da177e4SLinus Torvalds { 23181da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 23191da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 23201da177e4SLinus Torvalds struct nfs4_delegation *tryd = 23211da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 23221da177e4SLinus Torvalds 23231da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 23241da177e4SLinus Torvalds return 0; 23251da177e4SLinus Torvalds 23261da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 23271da177e4SLinus Torvalds } 23281da177e4SLinus Torvalds 23291da177e4SLinus Torvalds 23301da177e4SLinus Torvalds static 23311da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 23321da177e4SLinus Torvalds { 23331da177e4SLinus Torvalds if (arg & F_UNLCK) 23341da177e4SLinus Torvalds return lease_modify(onlist, arg); 23351da177e4SLinus Torvalds else 23361da177e4SLinus Torvalds return -EAGAIN; 23371da177e4SLinus Torvalds } 23381da177e4SLinus Torvalds 23397b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 23401da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 23411da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 23421da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 23431da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 23441da177e4SLinus Torvalds }; 23451da177e4SLinus Torvalds 23461da177e4SLinus Torvalds 2347b37ad28bSAl Viro __be32 23486668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 23496668958fSAndy Adamson struct nfsd4_open *open) 23501da177e4SLinus Torvalds { 23511da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 23521da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 23531da177e4SLinus Torvalds unsigned int strhashval; 23541da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 23551da177e4SLinus Torvalds 23561da177e4SLinus Torvalds if (!check_name(open->op_owner)) 23570f442aa2SJ. Bruce Fields return nfserr_inval; 23581da177e4SLinus Torvalds 23591da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 23601da177e4SLinus Torvalds return nfserr_stale_clientid; 23611da177e4SLinus Torvalds 23621da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 23631da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 23641da177e4SLinus Torvalds open->op_stateowner = sop; 23650f442aa2SJ. Bruce Fields if (!sop) { 23660f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 23670f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 23680f442aa2SJ. Bruce Fields if (clp == NULL) 23690f442aa2SJ. Bruce Fields return nfserr_expired; 23700f442aa2SJ. Bruce Fields goto renew; 23710f442aa2SJ. Bruce Fields } 23726668958fSAndy Adamson /* When sessions are used, skip open sequenceid processing */ 23736668958fSAndy Adamson if (nfsd4_has_session(cstate)) 23746668958fSAndy Adamson goto renew; 2375ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 23760f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2377ae8b6253SJ. Bruce Fields clp = sop->so_client; 2378f044ff83SJ. Bruce Fields release_openowner(sop); 23790f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 2380ae8b6253SJ. Bruce Fields goto renew; 23810f442aa2SJ. Bruce Fields } 23820f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 23831da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 2384a90b061cSAl Viro return nfserr_replay_me; 23851da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 23861da177e4SLinus Torvalds * that we don't even have replay data saved! 23871da177e4SLinus Torvalds * Therefore, we have no choice but to continue 23881da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 23891da177e4SLinus Torvalds * fail again for the same reason. 23901da177e4SLinus Torvalds */ 23910f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 23921da177e4SLinus Torvalds goto renew; 23931da177e4SLinus Torvalds } 23940f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 23950f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 23960f442aa2SJ. Bruce Fields renew: 23970f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 23981da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 23991da177e4SLinus Torvalds if (sop == NULL) 24000f442aa2SJ. Bruce Fields return nfserr_resource; 24011da177e4SLinus Torvalds open->op_stateowner = sop; 24020f442aa2SJ. Bruce Fields } 24030f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 24041da177e4SLinus Torvalds renew_client(sop->so_client); 24050f442aa2SJ. Bruce Fields return nfs_ok; 24061da177e4SLinus Torvalds } 24071da177e4SLinus Torvalds 2408b37ad28bSAl Viro static inline __be32 24094a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 24104a6e43e6SNeilBrown { 24114a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 24124a6e43e6SNeilBrown return nfserr_openmode; 24134a6e43e6SNeilBrown else 24144a6e43e6SNeilBrown return nfs_ok; 24154a6e43e6SNeilBrown } 24164a6e43e6SNeilBrown 241752f4fb43SNeilBrown static struct nfs4_delegation * 241852f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 241952f4fb43SNeilBrown { 242052f4fb43SNeilBrown struct nfs4_delegation *dp; 242152f4fb43SNeilBrown 2422ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 242352f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 242452f4fb43SNeilBrown return dp; 242552f4fb43SNeilBrown } 242652f4fb43SNeilBrown return NULL; 242752f4fb43SNeilBrown } 242852f4fb43SNeilBrown 242924a0111eSJ. Bruce Fields int share_access_to_flags(u32 share_access) 243024a0111eSJ. Bruce Fields { 243124a0111eSJ. Bruce Fields share_access &= ~NFS4_SHARE_WANT_MASK; 243224a0111eSJ. Bruce Fields 243324a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 243424a0111eSJ. Bruce Fields } 243524a0111eSJ. Bruce Fields 2436b37ad28bSAl Viro static __be32 2437567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2438567d9829SNeilBrown struct nfs4_delegation **dp) 2439567d9829SNeilBrown { 2440567d9829SNeilBrown int flags; 2441b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2442567d9829SNeilBrown 2443567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2444567d9829SNeilBrown if (*dp == NULL) 2445c44c5eebSNeilBrown goto out; 244624a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2447567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2448567d9829SNeilBrown if (status) 2449567d9829SNeilBrown *dp = NULL; 2450c44c5eebSNeilBrown out: 2451c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2452c44c5eebSNeilBrown return nfs_ok; 2453c44c5eebSNeilBrown if (status) 2454c44c5eebSNeilBrown return status; 2455c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 2456c44c5eebSNeilBrown return nfs_ok; 2457567d9829SNeilBrown } 2458567d9829SNeilBrown 2459b37ad28bSAl Viro static __be32 24601da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 24611da177e4SLinus Torvalds { 24621da177e4SLinus Torvalds struct nfs4_stateid *local; 2463b37ad28bSAl Viro __be32 status = nfserr_share_denied; 24641da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 24651da177e4SLinus Torvalds 24668beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 24671da177e4SLinus Torvalds /* ignore lock owners */ 24681da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 24691da177e4SLinus Torvalds continue; 24701da177e4SLinus Torvalds /* remember if we have seen this open owner */ 24711da177e4SLinus Torvalds if (local->st_stateowner == sop) 24721da177e4SLinus Torvalds *stpp = local; 24731da177e4SLinus Torvalds /* check for conflicting share reservations */ 24741da177e4SLinus Torvalds if (!test_share(local, open)) 24751da177e4SLinus Torvalds goto out; 24761da177e4SLinus Torvalds } 24771da177e4SLinus Torvalds status = 0; 24781da177e4SLinus Torvalds out: 24791da177e4SLinus Torvalds return status; 24801da177e4SLinus Torvalds } 24811da177e4SLinus Torvalds 24825ac049acSNeilBrown static inline struct nfs4_stateid * 24835ac049acSNeilBrown nfs4_alloc_stateid(void) 24845ac049acSNeilBrown { 24855ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 24865ac049acSNeilBrown } 24875ac049acSNeilBrown 248821fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 248921fb4016SJ. Bruce Fields { 249021fb4016SJ. Bruce Fields int flags = 0; 249121fb4016SJ. Bruce Fields 249221fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 249321fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 249421fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 249521fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 249621fb4016SJ. Bruce Fields return flags; 249721fb4016SJ. Bruce Fields } 249821fb4016SJ. Bruce Fields 2499f9d7562fSJ. Bruce Fields static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file 2500f9d7562fSJ. Bruce Fields *fp, struct svc_fh *cur_fh, u32 nfs4_access) 2501f9d7562fSJ. Bruce Fields { 2502f9d7562fSJ. Bruce Fields __be32 status; 2503f9d7562fSJ. Bruce Fields int oflag = nfs4_access_to_omode(nfs4_access); 2504f9d7562fSJ. Bruce Fields int access = nfs4_access_to_access(nfs4_access); 2505f9d7562fSJ. Bruce Fields 2506f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2507f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2508f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2509f9d7562fSJ. Bruce Fields if (status == nfserr_dropit) 2510f9d7562fSJ. Bruce Fields status = nfserr_jukebox; 2511f9d7562fSJ. Bruce Fields if (status) 2512f9d7562fSJ. Bruce Fields return status; 2513f9d7562fSJ. Bruce Fields } 2514f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2515f9d7562fSJ. Bruce Fields 2516f9d7562fSJ. Bruce Fields return nfs_ok; 2517f9d7562fSJ. Bruce Fields } 2518f9d7562fSJ. Bruce Fields 2519b37ad28bSAl Viro static __be32 25201da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2521f9d7562fSJ. Bruce Fields struct nfs4_file *fp, struct svc_fh *cur_fh, 2522f9d7562fSJ. Bruce Fields struct nfsd4_open *open) 25231da177e4SLinus Torvalds { 25241da177e4SLinus Torvalds struct nfs4_stateid *stp; 2525f9d7562fSJ. Bruce Fields __be32 status; 25261da177e4SLinus Torvalds 25275ac049acSNeilBrown stp = nfs4_alloc_stateid(); 25281da177e4SLinus Torvalds if (stp == NULL) 25291da177e4SLinus Torvalds return nfserr_resource; 25301da177e4SLinus Torvalds 2531f9d7562fSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access); 25321da177e4SLinus Torvalds if (status) { 25335ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 25341da177e4SLinus Torvalds return status; 25351da177e4SLinus Torvalds } 25361da177e4SLinus Torvalds *stpp = stp; 25371da177e4SLinus Torvalds return 0; 25381da177e4SLinus Torvalds } 25391da177e4SLinus Torvalds 2540b37ad28bSAl Viro static inline __be32 25411da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 25421da177e4SLinus Torvalds struct nfsd4_open *open) 25431da177e4SLinus Torvalds { 25441da177e4SLinus Torvalds struct iattr iattr = { 25451da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 25461da177e4SLinus Torvalds .ia_size = 0, 25471da177e4SLinus Torvalds }; 25481da177e4SLinus Torvalds if (!open->op_truncate) 25491da177e4SLinus Torvalds return 0; 25501da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 25519246585aSAl Viro return nfserr_inval; 25521da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 25531da177e4SLinus Torvalds } 25541da177e4SLinus Torvalds 2555b37ad28bSAl Viro static __be32 2556f9d7562fSJ. Bruce Fields nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 25571da177e4SLinus Torvalds { 25587d947842SJ. Bruce Fields u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; 25597d947842SJ. Bruce Fields bool new_access; 2560b37ad28bSAl Viro __be32 status; 25611da177e4SLinus Torvalds 25627d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2563f9d7562fSJ. Bruce Fields if (new_access) { 25647d947842SJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access); 2565f9d7562fSJ. Bruce Fields if (status) 2566f9d7562fSJ. Bruce Fields return status; 25676c26d08fSJ. Bruce Fields } 25681da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 25691da177e4SLinus Torvalds if (status) { 2570f9d7562fSJ. Bruce Fields if (new_access) { 2571f9d7562fSJ. Bruce Fields int oflag = nfs4_access_to_omode(new_access); 2572f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2573f9d7562fSJ. Bruce Fields } 25741da177e4SLinus Torvalds return status; 25751da177e4SLinus Torvalds } 25761da177e4SLinus Torvalds /* remember the open */ 257724a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2578b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 25791da177e4SLinus Torvalds 25801da177e4SLinus Torvalds return nfs_ok; 25811da177e4SLinus Torvalds } 25821da177e4SLinus Torvalds 25831da177e4SLinus Torvalds 25841da177e4SLinus Torvalds static void 258537515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 25861da177e4SLinus Torvalds { 25871da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 2588c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 25891da177e4SLinus Torvalds } 25901da177e4SLinus Torvalds 25911da177e4SLinus Torvalds /* 25921da177e4SLinus Torvalds * Attempt to hand out a delegation. 25931da177e4SLinus Torvalds */ 25941da177e4SLinus Torvalds static void 25951da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 25961da177e4SLinus Torvalds { 25971da177e4SLinus Torvalds struct nfs4_delegation *dp; 25981da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 25992bf23875SJ. Bruce Fields int cb_up = atomic_read(&sop->so_client->cl_cb_set); 2600c5b1f0d9SArnd Bergmann struct file_lock *fl; 26011da177e4SLinus Torvalds int status, flag = 0; 26021da177e4SLinus Torvalds 26031da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 26047b190fecSNeilBrown open->op_recall = 0; 26057b190fecSNeilBrown switch (open->op_claim_type) { 26067b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 26072bf23875SJ. Bruce Fields if (!cb_up) 26087b190fecSNeilBrown open->op_recall = 1; 26097b190fecSNeilBrown flag = open->op_delegate_type; 26107b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 26111da177e4SLinus Torvalds goto out; 26127b190fecSNeilBrown break; 26137b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 26147b190fecSNeilBrown /* Let's not give out any delegations till everyone's 26157b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2616af558e33SJ. Bruce Fields if (locks_in_grace()) 26177b190fecSNeilBrown goto out; 26182bf23875SJ. Bruce Fields if (!cb_up || !sop->so_confirmed) 26197b190fecSNeilBrown goto out; 26201da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 26211da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 26221da177e4SLinus Torvalds else 26231da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 26247b190fecSNeilBrown break; 26257b190fecSNeilBrown default: 26267b190fecSNeilBrown goto out; 26277b190fecSNeilBrown } 26281da177e4SLinus Torvalds 26291da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 26301da177e4SLinus Torvalds if (dp == NULL) { 26311da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 26321da177e4SLinus Torvalds goto out; 26331da177e4SLinus Torvalds } 2634c5b1f0d9SArnd Bergmann status = -ENOMEM; 2635c5b1f0d9SArnd Bergmann fl = locks_alloc_lock(); 2636c5b1f0d9SArnd Bergmann if (!fl) 2637c5b1f0d9SArnd Bergmann goto out; 2638c5b1f0d9SArnd Bergmann locks_init_lock(fl); 2639c5b1f0d9SArnd Bergmann fl->fl_lmops = &nfsd_lease_mng_ops; 2640c5b1f0d9SArnd Bergmann fl->fl_flags = FL_LEASE; 2641c5b1f0d9SArnd Bergmann fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 2642c5b1f0d9SArnd Bergmann fl->fl_end = OFFSET_MAX; 2643c5b1f0d9SArnd Bergmann fl->fl_owner = (fl_owner_t)dp; 2644c5b1f0d9SArnd Bergmann fl->fl_file = find_readable_file(stp->st_file); 2645c5b1f0d9SArnd Bergmann BUG_ON(!fl->fl_file); 2646c5b1f0d9SArnd Bergmann fl->fl_pid = current->tgid; 2647fcf744a9SJ. Bruce Fields dp->dl_flock = fl; 26481da177e4SLinus Torvalds 2649a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 26501da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 26511da177e4SLinus Torvalds */ 2652c5b1f0d9SArnd Bergmann if ((status = vfs_setlease(fl->fl_file, fl->fl_type, &fl))) { 26531da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 2654fcf744a9SJ. Bruce Fields dp->dl_flock = NULL; 2655c907132dSNeilBrown unhash_delegation(dp); 26561da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 26571da177e4SLinus Torvalds goto out; 26581da177e4SLinus Torvalds } 26591da177e4SLinus Torvalds 26601da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 26611da177e4SLinus Torvalds 26628c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 26638c10cbdbSBenny Halevy STATEID_VAL(&dp->dl_stateid)); 26641da177e4SLinus Torvalds out: 26657b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 26667b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 26677b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 26682fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 26691da177e4SLinus Torvalds open->op_delegate_type = flag; 26701da177e4SLinus Torvalds } 26711da177e4SLinus Torvalds 26721da177e4SLinus Torvalds /* 26731da177e4SLinus Torvalds * called with nfs4_lock_state() held. 26741da177e4SLinus Torvalds */ 2675b37ad28bSAl Viro __be32 26761da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 26771da177e4SLinus Torvalds { 26786668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 26791da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 26801da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 26811da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2682567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2683b37ad28bSAl Viro __be32 status; 26841da177e4SLinus Torvalds 26851da177e4SLinus Torvalds status = nfserr_inval; 2686d87a8adeSAndy Adamson if (!access_valid(open->op_share_access, resp->cstate.minorversion) 2687ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 26881da177e4SLinus Torvalds goto out; 26891da177e4SLinus Torvalds /* 26901da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 26911da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 26921da177e4SLinus Torvalds * If not found, create the nfs4_file struct 26931da177e4SLinus Torvalds */ 26941da177e4SLinus Torvalds fp = find_file(ino); 26951da177e4SLinus Torvalds if (fp) { 26961da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 26971da177e4SLinus Torvalds goto out; 2698c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2699c44c5eebSNeilBrown if (status) 2700c44c5eebSNeilBrown goto out; 27011da177e4SLinus Torvalds } else { 2702c44c5eebSNeilBrown status = nfserr_bad_stateid; 2703c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2704c44c5eebSNeilBrown goto out; 27051da177e4SLinus Torvalds status = nfserr_resource; 27061da177e4SLinus Torvalds fp = alloc_init_file(ino); 27071da177e4SLinus Torvalds if (fp == NULL) 27081da177e4SLinus Torvalds goto out; 27091da177e4SLinus Torvalds } 27101da177e4SLinus Torvalds 27111da177e4SLinus Torvalds /* 27121da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 27131da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 27141da177e4SLinus Torvalds */ 27151da177e4SLinus Torvalds if (stp) { 27161da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 2717f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 27181da177e4SLinus Torvalds if (status) 27191da177e4SLinus Torvalds goto out; 2720444c2c07SNeilBrown update_stateid(&stp->st_stateid); 27211da177e4SLinus Torvalds } else { 2722f9d7562fSJ. Bruce Fields status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); 2723567d9829SNeilBrown if (status) 27241da177e4SLinus Torvalds goto out; 27251da177e4SLinus Torvalds init_stateid(stp, fp, open); 27261da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 27271da177e4SLinus Torvalds if (status) { 27282283963fSJ. Bruce Fields release_open_stateid(stp); 27291da177e4SLinus Torvalds goto out; 27301da177e4SLinus Torvalds } 27316668958fSAndy Adamson if (nfsd4_has_session(&resp->cstate)) 27326668958fSAndy Adamson update_stateid(&stp->st_stateid); 27331da177e4SLinus Torvalds } 27341da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 27351da177e4SLinus Torvalds 27364dc6ec00SJ. Bruce Fields if (nfsd4_has_session(&resp->cstate)) 27376668958fSAndy Adamson open->op_stateowner->so_confirmed = 1; 27386668958fSAndy Adamson 27391da177e4SLinus Torvalds /* 27401da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 27411da177e4SLinus Torvalds * OPEN succeeds even if we fail. 27421da177e4SLinus Torvalds */ 27431da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 27441da177e4SLinus Torvalds 27451da177e4SLinus Torvalds status = nfs_ok; 27461da177e4SLinus Torvalds 27478c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 27488c10cbdbSBenny Halevy STATEID_VAL(&stp->st_stateid)); 27491da177e4SLinus Torvalds out: 275013cd2184SNeilBrown if (fp) 275113cd2184SNeilBrown put_nfs4_file(fp); 275237515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 275337515177SNeilBrown nfs4_set_claim_prev(open); 27541da177e4SLinus Torvalds /* 27551da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 27561da177e4SLinus Torvalds */ 27571da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 27586668958fSAndy Adamson if (!open->op_stateowner->so_confirmed && 27596668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 27601da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 27611da177e4SLinus Torvalds 27621da177e4SLinus Torvalds return status; 27631da177e4SLinus Torvalds } 27641da177e4SLinus Torvalds 2765b37ad28bSAl Viro __be32 2766b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2767b591480bSJ.Bruce Fields clientid_t *clid) 27681da177e4SLinus Torvalds { 27691da177e4SLinus Torvalds struct nfs4_client *clp; 2770b37ad28bSAl Viro __be32 status; 27711da177e4SLinus Torvalds 27721da177e4SLinus Torvalds nfs4_lock_state(); 27731da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 27741da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 27751da177e4SLinus Torvalds status = nfserr_stale_clientid; 27761da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 27771da177e4SLinus Torvalds goto out; 27781da177e4SLinus Torvalds clp = find_confirmed_client(clid); 27791da177e4SLinus Torvalds status = nfserr_expired; 27801da177e4SLinus Torvalds if (clp == NULL) { 27811da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 27821da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 27831da177e4SLinus Torvalds goto out; 27841da177e4SLinus Torvalds } 27851da177e4SLinus Torvalds renew_client(clp); 27861da177e4SLinus Torvalds status = nfserr_cb_path_down; 2787ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 27882bf23875SJ. Bruce Fields && !atomic_read(&clp->cl_cb_set)) 27891da177e4SLinus Torvalds goto out; 27901da177e4SLinus Torvalds status = nfs_ok; 27911da177e4SLinus Torvalds out: 27921da177e4SLinus Torvalds nfs4_unlock_state(); 27931da177e4SLinus Torvalds return status; 27941da177e4SLinus Torvalds } 27951da177e4SLinus Torvalds 2796af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 2797af558e33SJ. Bruce Fields }; 2798af558e33SJ. Bruce Fields 2799a76b4319SNeilBrown static void 2800af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2801a76b4319SNeilBrown { 2802a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2803c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2804af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2805e46b498cSJ. Bruce Fields /* 2806e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 2807e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 2808e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 2809e46b498cSJ. Bruce Fields */ 2810e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 2811a76b4319SNeilBrown } 2812a76b4319SNeilBrown 2813fd39ca9aSNeilBrown static time_t 28141da177e4SLinus Torvalds nfs4_laundromat(void) 28151da177e4SLinus Torvalds { 28161da177e4SLinus Torvalds struct nfs4_client *clp; 28171da177e4SLinus Torvalds struct nfs4_stateowner *sop; 28181da177e4SLinus Torvalds struct nfs4_delegation *dp; 28191da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 2820cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 2821cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 2822cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 28231da177e4SLinus Torvalds 28241da177e4SLinus Torvalds nfs4_lock_state(); 28251da177e4SLinus Torvalds 28261da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 2827af558e33SJ. Bruce Fields if (locks_in_grace()) 2828af558e33SJ. Bruce Fields nfsd4_end_grace(); 282936acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 283036acb66bSBenny Halevy spin_lock(&client_lock); 28311da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 28321da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 28331da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 28341da177e4SLinus Torvalds t = clp->cl_time - cutoff; 28351da177e4SLinus Torvalds if (clientid_val > t) 28361da177e4SLinus Torvalds clientid_val = t; 28371da177e4SLinus Torvalds break; 28381da177e4SLinus Torvalds } 2839d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 2840d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 2841d7682988SBenny Halevy clp->cl_clientid.cl_id); 2842d7682988SBenny Halevy continue; 2843d7682988SBenny Halevy } 2844d7682988SBenny Halevy unhash_client_locked(clp); 2845d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 284636acb66bSBenny Halevy } 284736acb66bSBenny Halevy spin_unlock(&client_lock); 284836acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 284936acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 28501da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 28511da177e4SLinus Torvalds clp->cl_clientid.cl_id); 2852c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 28531da177e4SLinus Torvalds expire_client(clp); 28541da177e4SLinus Torvalds } 28551da177e4SLinus Torvalds spin_lock(&recall_lock); 28561da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 28571da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 28581da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 28591da177e4SLinus Torvalds u = dp->dl_time - cutoff; 28601da177e4SLinus Torvalds if (test_val > u) 28611da177e4SLinus Torvalds test_val = u; 28621da177e4SLinus Torvalds break; 28631da177e4SLinus Torvalds } 28641da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 28651da177e4SLinus Torvalds dp, dp->dl_flock); 28661da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 28671da177e4SLinus Torvalds } 28681da177e4SLinus Torvalds spin_unlock(&recall_lock); 28691da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 28701da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 28711da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 28721da177e4SLinus Torvalds unhash_delegation(dp); 28731da177e4SLinus Torvalds } 2874cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 28751da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 28761da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 28771da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 28781da177e4SLinus Torvalds u = sop->so_time - cutoff; 28791da177e4SLinus Torvalds if (test_val > u) 28801da177e4SLinus Torvalds test_val = u; 28811da177e4SLinus Torvalds break; 28821da177e4SLinus Torvalds } 28831da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 28841da177e4SLinus Torvalds sop->so_id); 2885f044ff83SJ. Bruce Fields release_openowner(sop); 28861da177e4SLinus Torvalds } 28871da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 28881da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 28891da177e4SLinus Torvalds nfs4_unlock_state(); 28901da177e4SLinus Torvalds return clientid_val; 28911da177e4SLinus Torvalds } 28921da177e4SLinus Torvalds 2893a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 2894a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 2895a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 2896a254b246SHarvey Harrison 2897a254b246SHarvey Harrison static void 2898c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 28991da177e4SLinus Torvalds { 29001da177e4SLinus Torvalds time_t t; 29011da177e4SLinus Torvalds 29021da177e4SLinus Torvalds t = nfs4_laundromat(); 29031da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 290458da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 29051da177e4SLinus Torvalds } 29061da177e4SLinus Torvalds 2907fd39ca9aSNeilBrown static struct nfs4_stateowner * 2908f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 2909f8816512SNeilBrown { 29101da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 29111da177e4SLinus Torvalds 29121da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 29131da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 29141da177e4SLinus Torvalds if (local->so_id == st_id) 29151da177e4SLinus Torvalds return local; 29161da177e4SLinus Torvalds } 29171da177e4SLinus Torvalds } 29181da177e4SLinus Torvalds return NULL; 29191da177e4SLinus Torvalds } 29201da177e4SLinus Torvalds 29211da177e4SLinus Torvalds static inline int 29221da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 29231da177e4SLinus Torvalds { 2924f9d7562fSJ. Bruce Fields return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; 29251da177e4SLinus Torvalds } 29261da177e4SLinus Torvalds 29271da177e4SLinus Torvalds static int 29281da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 29291da177e4SLinus Torvalds { 2930e4e83ea4SJ. Bruce Fields if (stateid->si_boot == boot_time) 2931e4e83ea4SJ. Bruce Fields return 0; 29328c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 29338c10cbdbSBenny Halevy STATEID_VAL(stateid)); 29341da177e4SLinus Torvalds return 1; 29351da177e4SLinus Torvalds } 29361da177e4SLinus Torvalds 29371da177e4SLinus Torvalds static inline int 29381da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 29391da177e4SLinus Torvalds { 29401da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 29411da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 29421da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 29431da177e4SLinus Torvalds } 29441da177e4SLinus Torvalds 29451da177e4SLinus Torvalds static inline int 29461da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 29471da177e4SLinus Torvalds { 29481da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 29491da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 29501da177e4SLinus Torvalds } 29511da177e4SLinus Torvalds 29521da177e4SLinus Torvalds static 2953b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 29541da177e4SLinus Torvalds { 2955b37ad28bSAl Viro __be32 status = nfserr_openmode; 29561da177e4SLinus Torvalds 295702921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 295802921914SJ. Bruce Fields if (stp->st_openstp) 295902921914SJ. Bruce Fields stp = stp->st_openstp; 29601da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 29611da177e4SLinus Torvalds goto out; 29621da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 29631da177e4SLinus Torvalds goto out; 29641da177e4SLinus Torvalds status = nfs_ok; 29651da177e4SLinus Torvalds out: 29661da177e4SLinus Torvalds return status; 29671da177e4SLinus Torvalds } 29681da177e4SLinus Torvalds 2969b37ad28bSAl Viro static inline __be32 29701da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 29711da177e4SLinus Torvalds { 2972203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 29731da177e4SLinus Torvalds return nfs_ok; 2974af558e33SJ. Bruce Fields else if (locks_in_grace()) { 29751da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 29761da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 29771da177e4SLinus Torvalds return nfserr_grace; 29781da177e4SLinus Torvalds } else if (flags & WR_STATE) 29791da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 29801da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 29811da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 29821da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 29831da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 29841da177e4SLinus Torvalds } 29851da177e4SLinus Torvalds 29861da177e4SLinus Torvalds /* 29871da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 29881da177e4SLinus Torvalds * that are not able to provide mandatory locking. 29891da177e4SLinus Torvalds */ 29901da177e4SLinus Torvalds static inline int 299118f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 29921da177e4SLinus Torvalds { 2993203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 29941da177e4SLinus Torvalds } 29951da177e4SLinus Torvalds 29966668958fSAndy Adamson static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) 29970836f587SJ. Bruce Fields { 29986668958fSAndy Adamson /* 29996668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 30006668958fSAndy Adamson * when it is zero. 30016668958fSAndy Adamson */ 30026668958fSAndy Adamson if ((flags & HAS_SESSION) && in->si_generation == 0) 30036668958fSAndy Adamson goto out; 30046668958fSAndy Adamson 30050836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 30060836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 30070836f587SJ. Bruce Fields return nfserr_bad_stateid; 30080836f587SJ. Bruce Fields /* 30090836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 30100836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 30110836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 30120836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 30130836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 30140836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 30150836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 30160836f587SJ. Bruce Fields * will just have to retry the IO: 30170836f587SJ. Bruce Fields */ 30180836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 30190836f587SJ. Bruce Fields return nfserr_old_stateid; 30206668958fSAndy Adamson out: 30210836f587SJ. Bruce Fields return nfs_ok; 30220836f587SJ. Bruce Fields } 30230836f587SJ. Bruce Fields 30243e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 30253e633079SJ. Bruce Fields { 30263e633079SJ. Bruce Fields return stateid->si_fileid == 0; 30273e633079SJ. Bruce Fields } 30283e633079SJ. Bruce Fields 30291da177e4SLinus Torvalds /* 30301da177e4SLinus Torvalds * Checks for stateid operations 30311da177e4SLinus Torvalds */ 3032b37ad28bSAl Viro __be32 3033dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3034dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 30351da177e4SLinus Torvalds { 30361da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 30371da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3038dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 30391da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3040b37ad28bSAl Viro __be32 status; 30411da177e4SLinus Torvalds 30421da177e4SLinus Torvalds if (filpp) 30431da177e4SLinus Torvalds *filpp = NULL; 30441da177e4SLinus Torvalds 304518f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 30461da177e4SLinus Torvalds return nfserr_grace; 30471da177e4SLinus Torvalds 30486668958fSAndy Adamson if (nfsd4_has_session(cstate)) 30496668958fSAndy Adamson flags |= HAS_SESSION; 30506668958fSAndy Adamson 30511da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 30521da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 30531da177e4SLinus Torvalds 30541da177e4SLinus Torvalds status = nfserr_stale_stateid; 30551da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 30561da177e4SLinus Torvalds goto out; 30571da177e4SLinus Torvalds 305833515142SJ. Bruce Fields /* 305933515142SJ. Bruce Fields * We assume that any stateid that has the current boot time, 306033515142SJ. Bruce Fields * but that we can't find, is expired: 306133515142SJ. Bruce Fields */ 306233515142SJ. Bruce Fields status = nfserr_expired; 30633e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 3064a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 3065e4e83ea4SJ. Bruce Fields if (!dp) 30661da177e4SLinus Torvalds goto out; 30676668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, 30686668958fSAndy Adamson flags); 30690c2a498fSJ. Bruce Fields if (status) 30700c2a498fSJ. Bruce Fields goto out; 3071dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3072dc9bf700SJ. Bruce Fields if (status) 3073dc9bf700SJ. Bruce Fields goto out; 3074dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 3075dc9bf700SJ. Bruce Fields if (filpp) 3076f9d7562fSJ. Bruce Fields *filpp = find_readable_file(dp->dl_file); 3077f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 30781da177e4SLinus Torvalds } else { /* open or lock stateid */ 3079a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 3080e4e83ea4SJ. Bruce Fields if (!stp) 30811da177e4SLinus Torvalds goto out; 308233515142SJ. Bruce Fields status = nfserr_bad_stateid; 30836150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 30841da177e4SLinus Torvalds goto out; 30851da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 30861da177e4SLinus Torvalds goto out; 30876668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, 30886668958fSAndy Adamson flags); 30890836f587SJ. Bruce Fields if (status) 30901da177e4SLinus Torvalds goto out; 3091a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3092a4455be0SJ. Bruce Fields if (status) 30931da177e4SLinus Torvalds goto out; 30941da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 3095f9d7562fSJ. Bruce Fields if (filpp) { 3096f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3097f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3098f9d7562fSJ. Bruce Fields else 3099f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3100f9d7562fSJ. Bruce Fields } 31011da177e4SLinus Torvalds } 31021da177e4SLinus Torvalds status = nfs_ok; 31031da177e4SLinus Torvalds out: 31041da177e4SLinus Torvalds return status; 31051da177e4SLinus Torvalds } 31061da177e4SLinus Torvalds 31074c4cd222SNeilBrown static inline int 31084c4cd222SNeilBrown setlkflg (int type) 31094c4cd222SNeilBrown { 31104c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 31114c4cd222SNeilBrown RD_STATE : WR_STATE; 31124c4cd222SNeilBrown } 31131da177e4SLinus Torvalds 31141da177e4SLinus Torvalds /* 31151da177e4SLinus Torvalds * Checks for sequence id mutating operations. 31161da177e4SLinus Torvalds */ 3117b37ad28bSAl Viro static __be32 3118dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 3119dd453dfdSBenny Halevy stateid_t *stateid, int flags, 3120dd453dfdSBenny Halevy struct nfs4_stateowner **sopp, 3121dd453dfdSBenny Halevy struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 31221da177e4SLinus Torvalds { 31231da177e4SLinus Torvalds struct nfs4_stateid *stp; 31241da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3125dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 31260836f587SJ. Bruce Fields __be32 status; 31271da177e4SLinus Torvalds 31288c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 31298c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 31301da177e4SLinus Torvalds 31311da177e4SLinus Torvalds *stpp = NULL; 31321da177e4SLinus Torvalds *sopp = NULL; 31331da177e4SLinus Torvalds 31341da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 31352fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 31363a4f98bbSNeilBrown return nfserr_bad_stateid; 31371da177e4SLinus Torvalds } 31381da177e4SLinus Torvalds 31391da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 31403a4f98bbSNeilBrown return nfserr_stale_stateid; 31416668958fSAndy Adamson 31426668958fSAndy Adamson if (nfsd4_has_session(cstate)) 31436668958fSAndy Adamson flags |= HAS_SESSION; 31446668958fSAndy Adamson 31451da177e4SLinus Torvalds /* 31461da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 31471da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 31481da177e4SLinus Torvalds * number is incorrect. 31491da177e4SLinus Torvalds */ 3150f8816512SNeilBrown stp = find_stateid(stateid, flags); 3151f8816512SNeilBrown if (stp == NULL) { 3152f8816512SNeilBrown /* 3153f8816512SNeilBrown * Also, we should make sure this isn't just the result of 3154f8816512SNeilBrown * a replayed close: 3155f8816512SNeilBrown */ 3156f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 315733515142SJ. Bruce Fields /* It's not stale; let's assume it's expired: */ 3158f8816512SNeilBrown if (sop == NULL) 315933515142SJ. Bruce Fields return nfserr_expired; 3160f8816512SNeilBrown *sopp = sop; 3161f8816512SNeilBrown goto check_replay; 3162f8816512SNeilBrown } 31631da177e4SLinus Torvalds 316439325bd0SJ. Bruce Fields *stpp = stp; 316539325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 316639325bd0SJ. Bruce Fields 31674c4cd222SNeilBrown if (lock) { 31684c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 31691da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 31704c4cd222SNeilBrown int lkflg = 0; 3171b37ad28bSAl Viro __be32 status; 31721da177e4SLinus Torvalds 31734c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 31744c4cd222SNeilBrown 31754c4cd222SNeilBrown if (lock->lk_is_new) { 31761da177e4SLinus Torvalds if (!sop->so_is_open_owner) 31773a4f98bbSNeilBrown return nfserr_bad_stateid; 317860adfc50SAndy Adamson if (!(flags & HAS_SESSION) && 317960adfc50SAndy Adamson !same_clid(&clp->cl_clientid, lockclid)) 31803a4f98bbSNeilBrown return nfserr_bad_stateid; 31814c4cd222SNeilBrown /* stp is the open stateid */ 31824c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 31834c4cd222SNeilBrown if (status) 31844c4cd222SNeilBrown return status; 31854c4cd222SNeilBrown } else { 31864c4cd222SNeilBrown /* stp is the lock stateid */ 31874c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 31884c4cd222SNeilBrown if (status) 31894c4cd222SNeilBrown return status; 31904c4cd222SNeilBrown } 31911da177e4SLinus Torvalds } 31921da177e4SLinus Torvalds 3193f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 31942fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 31953a4f98bbSNeilBrown return nfserr_bad_stateid; 31961da177e4SLinus Torvalds } 31971da177e4SLinus Torvalds 31981da177e4SLinus Torvalds /* 31991da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 32001da177e4SLinus Torvalds * For the moment, we ignore the possibility of 32011da177e4SLinus Torvalds * generation number wraparound. 32021da177e4SLinus Torvalds */ 32036668958fSAndy Adamson if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) 32041da177e4SLinus Torvalds goto check_replay; 32051da177e4SLinus Torvalds 32063a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 32072fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 32083a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 32093a4f98bbSNeilBrown return nfserr_bad_stateid; 32101da177e4SLinus Torvalds } 32113a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 32122fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 32133a4f98bbSNeilBrown " confirmed yet!\n"); 32143a4f98bbSNeilBrown return nfserr_bad_stateid; 32151da177e4SLinus Torvalds } 32166668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, flags); 32170836f587SJ. Bruce Fields if (status) 32180836f587SJ. Bruce Fields return status; 321952fd004eSNeilBrown renew_client(sop->so_client); 32203a4f98bbSNeilBrown return nfs_ok; 32211da177e4SLinus Torvalds 32221da177e4SLinus Torvalds check_replay: 3223bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 3224849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 32251da177e4SLinus Torvalds /* indicate replay to calling function */ 3226a90b061cSAl Viro return nfserr_replay_me; 32271da177e4SLinus Torvalds } 32282fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 32293a4f98bbSNeilBrown sop->so_seqid, seqid); 32303a4f98bbSNeilBrown *sopp = NULL; 32313a4f98bbSNeilBrown return nfserr_bad_seqid; 32321da177e4SLinus Torvalds } 32331da177e4SLinus Torvalds 3234b37ad28bSAl Viro __be32 3235ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3236a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 32371da177e4SLinus Torvalds { 3238b37ad28bSAl Viro __be32 status; 32391da177e4SLinus Torvalds struct nfs4_stateowner *sop; 32401da177e4SLinus Torvalds struct nfs4_stateid *stp; 32411da177e4SLinus Torvalds 32421da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3243ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3244ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 32451da177e4SLinus Torvalds 3246ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3247a8cddc5dSJ. Bruce Fields if (status) 3248a8cddc5dSJ. Bruce Fields return status; 32491da177e4SLinus Torvalds 32501da177e4SLinus Torvalds nfs4_lock_state(); 32511da177e4SLinus Torvalds 3252dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3253ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 3254f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 32551da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 32561da177e4SLinus Torvalds goto out; 32571da177e4SLinus Torvalds 32581da177e4SLinus Torvalds sop = oc->oc_stateowner; 32591da177e4SLinus Torvalds sop->so_confirmed = 1; 32601da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 32611da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 32628c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 32638c10cbdbSBenny Halevy __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); 3264c7b9a459SNeilBrown 3265c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 32661da177e4SLinus Torvalds out: 3267f2327d9aSNeil Brown if (oc->oc_stateowner) { 32681da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 3269a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 3270f2327d9aSNeil Brown } 32711da177e4SLinus Torvalds nfs4_unlock_state(); 32721da177e4SLinus Torvalds return status; 32731da177e4SLinus Torvalds } 32741da177e4SLinus Torvalds 32751da177e4SLinus Torvalds 32761da177e4SLinus Torvalds /* 32771da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 32781da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 32791da177e4SLinus Torvalds */ 32801da177e4SLinus Torvalds static void 32811da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 32821da177e4SLinus Torvalds { 32831da177e4SLinus Torvalds int i; 32841da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 32851da177e4SLinus Torvalds if ((i & access) != i) 32861da177e4SLinus Torvalds __clear_bit(i, bmap); 32871da177e4SLinus Torvalds } 32881da177e4SLinus Torvalds } 32891da177e4SLinus Torvalds 32901da177e4SLinus Torvalds static void 32911da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 32921da177e4SLinus Torvalds { 32931da177e4SLinus Torvalds int i; 32941da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 32951da177e4SLinus Torvalds if ((i & deny) != i) 32961da177e4SLinus Torvalds __clear_bit(i, bmap); 32971da177e4SLinus Torvalds } 32981da177e4SLinus Torvalds } 32991da177e4SLinus Torvalds 3300b37ad28bSAl Viro __be32 3301ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3302ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3303a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 33041da177e4SLinus Torvalds { 3305b37ad28bSAl Viro __be32 status; 33061da177e4SLinus Torvalds struct nfs4_stateid *stp; 33071da177e4SLinus Torvalds unsigned int share_access; 33081da177e4SLinus Torvalds 33091da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3310ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3311ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 33121da177e4SLinus Torvalds 3313d87a8adeSAndy Adamson if (!access_valid(od->od_share_access, cstate->minorversion) 3314ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 33151da177e4SLinus Torvalds return nfserr_inval; 33161da177e4SLinus Torvalds 33171da177e4SLinus Torvalds nfs4_lock_state(); 3318dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3319ca364317SJ.Bruce Fields od->od_seqid, 33201da177e4SLinus Torvalds &od->od_stateid, 3321f3362737SJ. Bruce Fields OPEN_STATE, 33221da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 33231da177e4SLinus Torvalds goto out; 33241da177e4SLinus Torvalds 33251da177e4SLinus Torvalds status = nfserr_inval; 33261da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 33271da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 33281da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 33291da177e4SLinus Torvalds goto out; 33301da177e4SLinus Torvalds } 33311da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 33321da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 33331da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 33341da177e4SLinus Torvalds goto out; 33351da177e4SLinus Torvalds } 33361da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 3337f9d7562fSJ. Bruce Fields nfs4_file_downgrade(stp->st_file, share_access & ~od->od_share_access); 33381da177e4SLinus Torvalds 33391da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 33401da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 33411da177e4SLinus Torvalds 33421da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 33431da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 33441da177e4SLinus Torvalds status = nfs_ok; 33451da177e4SLinus Torvalds out: 3346f2327d9aSNeil Brown if (od->od_stateowner) { 33471da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 3348a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 3349f2327d9aSNeil Brown } 33501da177e4SLinus Torvalds nfs4_unlock_state(); 33511da177e4SLinus Torvalds return status; 33521da177e4SLinus Torvalds } 33531da177e4SLinus Torvalds 33541da177e4SLinus Torvalds /* 33551da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 33561da177e4SLinus Torvalds */ 3357b37ad28bSAl Viro __be32 3358ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3359a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 33601da177e4SLinus Torvalds { 3361b37ad28bSAl Viro __be32 status; 33621da177e4SLinus Torvalds struct nfs4_stateid *stp; 33631da177e4SLinus Torvalds 33641da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3365ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3366ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 33671da177e4SLinus Torvalds 33681da177e4SLinus Torvalds nfs4_lock_state(); 33691da177e4SLinus Torvalds /* check close_lru for replay */ 3370dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3371ca364317SJ.Bruce Fields close->cl_seqid, 33721da177e4SLinus Torvalds &close->cl_stateid, 3373f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 33741da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 33751da177e4SLinus Torvalds goto out; 33761da177e4SLinus Torvalds status = nfs_ok; 33771da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 33781da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 33791da177e4SLinus Torvalds 338004ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 33812283963fSJ. Bruce Fields release_open_stateid(stp); 338204ef5954SJ. Bruce Fields 338304ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 338404ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 338504ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 338604ef5954SJ. Bruce Fields */ 338704ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 338804ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 33891da177e4SLinus Torvalds out: 3390f2327d9aSNeil Brown if (close->cl_stateowner) { 33911da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 3392a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 3393f2327d9aSNeil Brown } 33941da177e4SLinus Torvalds nfs4_unlock_state(); 33951da177e4SLinus Torvalds return status; 33961da177e4SLinus Torvalds } 33971da177e4SLinus Torvalds 3398b37ad28bSAl Viro __be32 3399ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3400ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 34011da177e4SLinus Torvalds { 3402203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3403203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 3404203a8c8eSJ. Bruce Fields struct inode *inode; 3405b37ad28bSAl Viro __be32 status; 34066668958fSAndy Adamson int flags = 0; 34071da177e4SLinus Torvalds 3408ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3409203a8c8eSJ. Bruce Fields return status; 3410203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 34111da177e4SLinus Torvalds 34126668958fSAndy Adamson if (nfsd4_has_session(cstate)) 34136668958fSAndy Adamson flags |= HAS_SESSION; 34141da177e4SLinus Torvalds nfs4_lock_state(); 3415203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 3416203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3417203a8c8eSJ. Bruce Fields goto out; 3418203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 3419203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 3420203a8c8eSJ. Bruce Fields goto out; 34217e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 3422203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 3423203a8c8eSJ. Bruce Fields goto out; 342433515142SJ. Bruce Fields status = nfserr_expired; 3425203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 3426e4e83ea4SJ. Bruce Fields if (!dp) 3427203a8c8eSJ. Bruce Fields goto out; 34286668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, flags); 3429203a8c8eSJ. Bruce Fields if (status) 3430203a8c8eSJ. Bruce Fields goto out; 3431203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 3432203a8c8eSJ. Bruce Fields 3433203a8c8eSJ. Bruce Fields unhash_delegation(dp); 34341da177e4SLinus Torvalds out: 3435203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3436203a8c8eSJ. Bruce Fields 34371da177e4SLinus Torvalds return status; 34381da177e4SLinus Torvalds } 34391da177e4SLinus Torvalds 34401da177e4SLinus Torvalds 34411da177e4SLinus Torvalds /* 34421da177e4SLinus Torvalds * Lock owner state (byte-range locks) 34431da177e4SLinus Torvalds */ 34441da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 34451da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 34461da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 34471da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 34481da177e4SLinus Torvalds 344987df4de8SBenny Halevy static inline u64 345087df4de8SBenny Halevy end_offset(u64 start, u64 len) 345187df4de8SBenny Halevy { 345287df4de8SBenny Halevy u64 end; 345387df4de8SBenny Halevy 345487df4de8SBenny Halevy end = start + len; 345587df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 345687df4de8SBenny Halevy } 345787df4de8SBenny Halevy 345887df4de8SBenny Halevy /* last octet in a range */ 345987df4de8SBenny Halevy static inline u64 346087df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 346187df4de8SBenny Halevy { 346287df4de8SBenny Halevy u64 end; 346387df4de8SBenny Halevy 346487df4de8SBenny Halevy BUG_ON(!len); 346587df4de8SBenny Halevy end = start + len; 346687df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 346787df4de8SBenny Halevy } 346887df4de8SBenny Halevy 34691da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 34701da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 34711da177e4SLinus Torvalds 34721da177e4SLinus Torvalds static inline unsigned int 34731da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 34741da177e4SLinus Torvalds struct xdr_netobj *ownername) 34751da177e4SLinus Torvalds { 34761da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 34771da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 34781da177e4SLinus Torvalds & LOCK_HASH_MASK; 34791da177e4SLinus Torvalds } 34801da177e4SLinus Torvalds 34811da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 34821da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 34831da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 34841da177e4SLinus Torvalds 3485fd39ca9aSNeilBrown static struct nfs4_stateid * 34861da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 34871da177e4SLinus Torvalds { 34889346eff0SKrishna Kumar struct nfs4_stateid *local; 34891da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 34901da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 34911da177e4SLinus Torvalds unsigned int hashval; 34921da177e4SLinus Torvalds 34931da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 34949346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 34951da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 34961da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 34971da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 34981da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 34991da177e4SLinus Torvalds return local; 35001da177e4SLinus Torvalds } 35011da177e4SLinus Torvalds } 35029346eff0SKrishna Kumar 35039346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 35041da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 35051da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 35061da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 35071da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 35081da177e4SLinus Torvalds return local; 35091da177e4SLinus Torvalds } 3510849823c5SNeil Brown } 35111da177e4SLinus Torvalds return NULL; 35121da177e4SLinus Torvalds } 35131da177e4SLinus Torvalds 35141da177e4SLinus Torvalds static struct nfs4_delegation * 35151da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 35161da177e4SLinus Torvalds { 351713cd2184SNeilBrown struct nfs4_file *fp; 351813cd2184SNeilBrown struct nfs4_delegation *dl; 35191da177e4SLinus Torvalds 35208c10cbdbSBenny Halevy dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, 35218c10cbdbSBenny Halevy STATEID_VAL(stid)); 35221da177e4SLinus Torvalds 35231da177e4SLinus Torvalds fp = find_file(ino); 352413cd2184SNeilBrown if (!fp) 35251da177e4SLinus Torvalds return NULL; 352613cd2184SNeilBrown dl = find_delegation_file(fp, stid); 352713cd2184SNeilBrown put_nfs4_file(fp); 352813cd2184SNeilBrown return dl; 35291da177e4SLinus Torvalds } 35301da177e4SLinus Torvalds 35311da177e4SLinus Torvalds /* 35321da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 35331da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 35341da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 35351da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 35361da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 35371da177e4SLinus Torvalds * the VFS, but this is a very deep change! 35381da177e4SLinus Torvalds */ 35391da177e4SLinus Torvalds static inline void 35401da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 35411da177e4SLinus Torvalds { 35421da177e4SLinus Torvalds if (lock->fl_start < 0) 35431da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 35441da177e4SLinus Torvalds if (lock->fl_end < 0) 35451da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 35461da177e4SLinus Torvalds } 35471da177e4SLinus Torvalds 3548d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3549d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 35507b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3551d5b9026aSNeilBrown }; 35521da177e4SLinus Torvalds 35531da177e4SLinus Torvalds static inline void 35541da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 35551da177e4SLinus Torvalds { 3556d5b9026aSNeilBrown struct nfs4_stateowner *sop; 35571da177e4SLinus Torvalds 3558d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3559d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 35601da177e4SLinus Torvalds kref_get(&sop->so_ref); 35611da177e4SLinus Torvalds deny->ld_sop = sop; 35621da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 3563d5b9026aSNeilBrown } else { 3564d5b9026aSNeilBrown deny->ld_sop = NULL; 3565d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3566d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 35671da177e4SLinus Torvalds } 35681da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 356987df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 357087df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 35711da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 35721da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 35731da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 35741da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 35751da177e4SLinus Torvalds } 35761da177e4SLinus Torvalds 35771da177e4SLinus Torvalds static struct nfs4_stateowner * 35781da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 35791da177e4SLinus Torvalds struct xdr_netobj *owner) 35801da177e4SLinus Torvalds { 35811da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 35821da177e4SLinus Torvalds struct nfs4_stateowner *op; 35831da177e4SLinus Torvalds 35841da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3585599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 35861da177e4SLinus Torvalds return op; 35871da177e4SLinus Torvalds } 35881da177e4SLinus Torvalds return NULL; 35891da177e4SLinus Torvalds } 35901da177e4SLinus Torvalds 35911da177e4SLinus Torvalds /* 35921da177e4SLinus Torvalds * Alloc a lock owner structure. 35931da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 35941da177e4SLinus Torvalds * occured. 35951da177e4SLinus Torvalds * 35961da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 35971da177e4SLinus Torvalds */ 35981da177e4SLinus Torvalds 35991da177e4SLinus Torvalds static struct nfs4_stateowner * 36001da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 36011da177e4SLinus Torvalds struct nfs4_stateowner *sop; 36021da177e4SLinus Torvalds struct nfs4_replay *rp; 36031da177e4SLinus Torvalds unsigned int idhashval; 36041da177e4SLinus Torvalds 36051da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 36061da177e4SLinus Torvalds return NULL; 36071da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 36081da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 36091da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 36101da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 3611ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 3612ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 36131da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 36141da177e4SLinus Torvalds sop->so_time = 0; 36151da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 36161da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3617ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 36181da177e4SLinus Torvalds sop->so_is_open_owner = 0; 36191da177e4SLinus Torvalds sop->so_id = current_ownerid++; 36201da177e4SLinus Torvalds sop->so_client = clp; 3621b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3622b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3623b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 36241da177e4SLinus Torvalds sop->so_confirmed = 1; 36251da177e4SLinus Torvalds rp = &sop->so_replay; 3626de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 36271da177e4SLinus Torvalds rp->rp_buflen = 0; 36281da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 36291da177e4SLinus Torvalds return sop; 36301da177e4SLinus Torvalds } 36311da177e4SLinus Torvalds 3632fd39ca9aSNeilBrown static struct nfs4_stateid * 36331da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 36341da177e4SLinus Torvalds { 36351da177e4SLinus Torvalds struct nfs4_stateid *stp; 36361da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 36371da177e4SLinus Torvalds 36385ac049acSNeilBrown stp = nfs4_alloc_stateid(); 36395ac049acSNeilBrown if (stp == NULL) 36401da177e4SLinus Torvalds goto out; 36411da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 36421da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3643ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3644ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 36451da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 36468beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3647ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 36481da177e4SLinus Torvalds stp->st_stateowner = sop; 364913cd2184SNeilBrown get_nfs4_file(fp); 36501da177e4SLinus Torvalds stp->st_file = fp; 3651e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 36521da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 36531da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 36541da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 36551da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 36564c4cd222SNeilBrown stp->st_openstp = open_stp; 36571da177e4SLinus Torvalds 36581da177e4SLinus Torvalds out: 36591da177e4SLinus Torvalds return stp; 36601da177e4SLinus Torvalds } 36611da177e4SLinus Torvalds 3662fd39ca9aSNeilBrown static int 36631da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 36641da177e4SLinus Torvalds { 366587df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 36661da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 36671da177e4SLinus Torvalds } 36681da177e4SLinus Torvalds 36691da177e4SLinus Torvalds /* 36701da177e4SLinus Torvalds * LOCK operation 36711da177e4SLinus Torvalds */ 3672b37ad28bSAl Viro __be32 3673ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3674a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 36751da177e4SLinus Torvalds { 36763e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 3677b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 36781da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 36797d947842SJ. Bruce Fields struct nfs4_file *fp; 36807d947842SJ. Bruce Fields struct file *filp = NULL; 36811da177e4SLinus Torvalds struct file_lock file_lock; 36828dc7c311SAndy Adamson struct file_lock conflock; 3683b37ad28bSAl Viro __be32 status = 0; 36841da177e4SLinus Torvalds unsigned int strhashval; 3685150b3934SMarc Eshel unsigned int cmd; 3686b8dd7b9aSAl Viro int err; 36871da177e4SLinus Torvalds 36881da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 36891da177e4SLinus Torvalds (long long) lock->lk_offset, 36901da177e4SLinus Torvalds (long long) lock->lk_length); 36911da177e4SLinus Torvalds 36921da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 36931da177e4SLinus Torvalds return nfserr_inval; 36941da177e4SLinus Torvalds 3695ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 36968837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3697a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3698a6f6ef2fSAndy Adamson return status; 3699a6f6ef2fSAndy Adamson } 3700a6f6ef2fSAndy Adamson 37011da177e4SLinus Torvalds nfs4_lock_state(); 37021da177e4SLinus Torvalds 37031da177e4SLinus Torvalds if (lock->lk_is_new) { 37041da177e4SLinus Torvalds /* 37051da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3706893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3707893f8770SNeilBrown * lock stateid. 37081da177e4SLinus Torvalds */ 37091da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 37101da177e4SLinus Torvalds 37111da177e4SLinus Torvalds status = nfserr_stale_clientid; 371260adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && 371360adfc50SAndy Adamson STALE_CLIENTID(&lock->lk_new_clientid)) 37141da177e4SLinus Torvalds goto out; 37151da177e4SLinus Torvalds 37161da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3717dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 37181da177e4SLinus Torvalds lock->lk_new_open_seqid, 37191da177e4SLinus Torvalds &lock->lk_new_open_stateid, 3720f3362737SJ. Bruce Fields OPEN_STATE, 37213a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 3722b59e3c0eSNeil Brown lock); 372337515177SNeilBrown if (status) 37241da177e4SLinus Torvalds goto out; 37253a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 37261da177e4SLinus Torvalds /* create lockowner and lock stateid */ 37271da177e4SLinus Torvalds fp = open_stp->st_file; 37281da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 37291da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 37301da177e4SLinus Torvalds &lock->v.new.owner); 37313e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 37323e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 37333e9e3dbeSNeilBrown * create new stateids)? */ 37341da177e4SLinus Torvalds status = nfserr_resource; 3735b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 3736b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 3737b59e3c0eSNeil Brown if (lock_sop == NULL) 37381da177e4SLinus Torvalds goto out; 3739b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 37408a280510SJ. Bruce Fields if (lock_stp == NULL) 37411da177e4SLinus Torvalds goto out; 37421da177e4SLinus Torvalds } else { 37431da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 3744dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 37451da177e4SLinus Torvalds lock->lk_old_lock_seqid, 37461da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 3747f3362737SJ. Bruce Fields LOCK_STATE, 37483a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 37491da177e4SLinus Torvalds if (status) 37501da177e4SLinus Torvalds goto out; 37513a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 37527d947842SJ. Bruce Fields fp = lock_stp->st_file; 37531da177e4SLinus Torvalds } 37543a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 37551da177e4SLinus Torvalds 37560dd395dcSNeilBrown status = nfserr_grace; 3757af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 37580dd395dcSNeilBrown goto out; 37590dd395dcSNeilBrown status = nfserr_no_grace; 3760af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 37610dd395dcSNeilBrown goto out; 37620dd395dcSNeilBrown 37631da177e4SLinus Torvalds locks_init_lock(&file_lock); 37641da177e4SLinus Torvalds switch (lock->lk_type) { 37651da177e4SLinus Torvalds case NFS4_READ_LT: 37661da177e4SLinus Torvalds case NFS4_READW_LT: 37677d947842SJ. Bruce Fields if (find_readable_file(lock_stp->st_file)) { 37687d947842SJ. Bruce Fields nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_READ); 3769f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 37707d947842SJ. Bruce Fields } 37711da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 3772150b3934SMarc Eshel cmd = F_SETLK; 37731da177e4SLinus Torvalds break; 37741da177e4SLinus Torvalds case NFS4_WRITE_LT: 37751da177e4SLinus Torvalds case NFS4_WRITEW_LT: 37767d947842SJ. Bruce Fields if (find_writeable_file(lock_stp->st_file)) { 37777d947842SJ. Bruce Fields nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_WRITE); 3778f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 37797d947842SJ. Bruce Fields } 37801da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 3781150b3934SMarc Eshel cmd = F_SETLK; 37821da177e4SLinus Torvalds break; 37831da177e4SLinus Torvalds default: 37841da177e4SLinus Torvalds status = nfserr_inval; 37851da177e4SLinus Torvalds goto out; 37861da177e4SLinus Torvalds } 3787f9d7562fSJ. Bruce Fields if (!filp) { 3788f9d7562fSJ. Bruce Fields status = nfserr_openmode; 3789f9d7562fSJ. Bruce Fields goto out; 3790f9d7562fSJ. Bruce Fields } 3791b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 37921da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 37931da177e4SLinus Torvalds file_lock.fl_file = filp; 37941da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3795d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 37961da177e4SLinus Torvalds 37971da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 379887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 37991da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 38001da177e4SLinus Torvalds 38011da177e4SLinus Torvalds /* 38021da177e4SLinus Torvalds * Try to lock the file in the VFS. 38031da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 38041da177e4SLinus Torvalds */ 38051da177e4SLinus Torvalds 3806fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 3807b8dd7b9aSAl Viro switch (-err) { 38081da177e4SLinus Torvalds case 0: /* success! */ 38091da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 38101da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 38111da177e4SLinus Torvalds sizeof(stateid_t)); 3812b8dd7b9aSAl Viro status = 0; 3813eb76b3fdSAndy Adamson break; 3814eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 3815eb76b3fdSAndy Adamson status = nfserr_denied; 3816eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 3817eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 3818eb76b3fdSAndy Adamson break; 38191da177e4SLinus Torvalds case (EDEADLK): 38201da177e4SLinus Torvalds status = nfserr_deadlock; 3821eb76b3fdSAndy Adamson break; 38221da177e4SLinus Torvalds default: 3823fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 3824eb76b3fdSAndy Adamson status = nfserr_resource; 3825eb76b3fdSAndy Adamson break; 38261da177e4SLinus Torvalds } 38271da177e4SLinus Torvalds out: 38288a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 3829f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 38303a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 38313a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 3832a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 3833f2327d9aSNeil Brown } 38341da177e4SLinus Torvalds nfs4_unlock_state(); 38351da177e4SLinus Torvalds return status; 38361da177e4SLinus Torvalds } 38371da177e4SLinus Torvalds 38381da177e4SLinus Torvalds /* 383955ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 384055ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 384155ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 384255ef1274SJ. Bruce Fields * inode operation.) 384355ef1274SJ. Bruce Fields */ 384455ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 384555ef1274SJ. Bruce Fields { 384655ef1274SJ. Bruce Fields struct file *file; 384755ef1274SJ. Bruce Fields int err; 384855ef1274SJ. Bruce Fields 384955ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 385055ef1274SJ. Bruce Fields if (err) 385155ef1274SJ. Bruce Fields return err; 385255ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 385355ef1274SJ. Bruce Fields nfsd_close(file); 385455ef1274SJ. Bruce Fields return err; 385555ef1274SJ. Bruce Fields } 385655ef1274SJ. Bruce Fields 385755ef1274SJ. Bruce Fields /* 38581da177e4SLinus Torvalds * LOCKT operation 38591da177e4SLinus Torvalds */ 3860b37ad28bSAl Viro __be32 3861ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3862ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 38631da177e4SLinus Torvalds { 38641da177e4SLinus Torvalds struct inode *inode; 38651da177e4SLinus Torvalds struct file_lock file_lock; 3866fd85b817SMarc Eshel int error; 3867b37ad28bSAl Viro __be32 status; 38681da177e4SLinus Torvalds 3869af558e33SJ. Bruce Fields if (locks_in_grace()) 38701da177e4SLinus Torvalds return nfserr_grace; 38711da177e4SLinus Torvalds 38721da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 38731da177e4SLinus Torvalds return nfserr_inval; 38741da177e4SLinus Torvalds 38751da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 38761da177e4SLinus Torvalds nfs4_lock_state(); 38771da177e4SLinus Torvalds 38781da177e4SLinus Torvalds status = nfserr_stale_clientid; 387960adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 38801da177e4SLinus Torvalds goto out; 38811da177e4SLinus Torvalds 3882ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 3883849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 38841da177e4SLinus Torvalds if (status == nfserr_symlink) 38851da177e4SLinus Torvalds status = nfserr_inval; 38861da177e4SLinus Torvalds goto out; 38871da177e4SLinus Torvalds } 38881da177e4SLinus Torvalds 3889ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 38901da177e4SLinus Torvalds locks_init_lock(&file_lock); 38911da177e4SLinus Torvalds switch (lockt->lt_type) { 38921da177e4SLinus Torvalds case NFS4_READ_LT: 38931da177e4SLinus Torvalds case NFS4_READW_LT: 38941da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 38951da177e4SLinus Torvalds break; 38961da177e4SLinus Torvalds case NFS4_WRITE_LT: 38971da177e4SLinus Torvalds case NFS4_WRITEW_LT: 38981da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 38991da177e4SLinus Torvalds break; 39001da177e4SLinus Torvalds default: 39012fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 39021da177e4SLinus Torvalds status = nfserr_inval; 39031da177e4SLinus Torvalds goto out; 39041da177e4SLinus Torvalds } 39051da177e4SLinus Torvalds 39061da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 39071da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 39081da177e4SLinus Torvalds if (lockt->lt_stateowner) 39091da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 39101da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 39111da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 39121da177e4SLinus Torvalds 39131da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 391487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 39151da177e4SLinus Torvalds 39161da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 39171da177e4SLinus Torvalds 39181da177e4SLinus Torvalds status = nfs_ok; 391955ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 3920fd85b817SMarc Eshel if (error) { 3921fd85b817SMarc Eshel status = nfserrno(error); 3922fd85b817SMarc Eshel goto out; 3923fd85b817SMarc Eshel } 39249d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 39251da177e4SLinus Torvalds status = nfserr_denied; 39269d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 39271da177e4SLinus Torvalds } 39281da177e4SLinus Torvalds out: 39291da177e4SLinus Torvalds nfs4_unlock_state(); 39301da177e4SLinus Torvalds return status; 39311da177e4SLinus Torvalds } 39321da177e4SLinus Torvalds 3933b37ad28bSAl Viro __be32 3934ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3935a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 39361da177e4SLinus Torvalds { 39371da177e4SLinus Torvalds struct nfs4_stateid *stp; 39381da177e4SLinus Torvalds struct file *filp = NULL; 39391da177e4SLinus Torvalds struct file_lock file_lock; 3940b37ad28bSAl Viro __be32 status; 3941b8dd7b9aSAl Viro int err; 39421da177e4SLinus Torvalds 39431da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 39441da177e4SLinus Torvalds (long long) locku->lu_offset, 39451da177e4SLinus Torvalds (long long) locku->lu_length); 39461da177e4SLinus Torvalds 39471da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 39481da177e4SLinus Torvalds return nfserr_inval; 39491da177e4SLinus Torvalds 39501da177e4SLinus Torvalds nfs4_lock_state(); 39511da177e4SLinus Torvalds 3952dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 39531da177e4SLinus Torvalds locku->lu_seqid, 39541da177e4SLinus Torvalds &locku->lu_stateid, 3955f3362737SJ. Bruce Fields LOCK_STATE, 39561da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 39571da177e4SLinus Torvalds goto out; 39581da177e4SLinus Torvalds 3959f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 3960f9d7562fSJ. Bruce Fields if (!filp) { 3961f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 3962f9d7562fSJ. Bruce Fields goto out; 3963f9d7562fSJ. Bruce Fields } 39641da177e4SLinus Torvalds BUG_ON(!filp); 39651da177e4SLinus Torvalds locks_init_lock(&file_lock); 39661da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 39671da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 39681da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 39691da177e4SLinus Torvalds file_lock.fl_file = filp; 39701da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3971d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 39721da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 39731da177e4SLinus Torvalds 397487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 39751da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 39761da177e4SLinus Torvalds 39771da177e4SLinus Torvalds /* 39781da177e4SLinus Torvalds * Try to unlock the file in the VFS. 39791da177e4SLinus Torvalds */ 3980fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 3981b8dd7b9aSAl Viro if (err) { 3982fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 39831da177e4SLinus Torvalds goto out_nfserr; 39841da177e4SLinus Torvalds } 39851da177e4SLinus Torvalds /* 39861da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 39871da177e4SLinus Torvalds */ 39881da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 39891da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 39901da177e4SLinus Torvalds 39911da177e4SLinus Torvalds out: 3992f2327d9aSNeil Brown if (locku->lu_stateowner) { 39931da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 3994a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 3995f2327d9aSNeil Brown } 39961da177e4SLinus Torvalds nfs4_unlock_state(); 39971da177e4SLinus Torvalds return status; 39981da177e4SLinus Torvalds 39991da177e4SLinus Torvalds out_nfserr: 4000b8dd7b9aSAl Viro status = nfserrno(err); 40011da177e4SLinus Torvalds goto out; 40021da177e4SLinus Torvalds } 40031da177e4SLinus Torvalds 40041da177e4SLinus Torvalds /* 40051da177e4SLinus Torvalds * returns 40061da177e4SLinus Torvalds * 1: locks held by lockowner 40071da177e4SLinus Torvalds * 0: no locks held by lockowner 40081da177e4SLinus Torvalds */ 40091da177e4SLinus Torvalds static int 4010f9d7562fSJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) 40111da177e4SLinus Torvalds { 40121da177e4SLinus Torvalds struct file_lock **flpp; 4013f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 40141da177e4SLinus Torvalds int status = 0; 40151da177e4SLinus Torvalds 4016b89f4321SArnd Bergmann lock_flocks(); 40171da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4018796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 40191da177e4SLinus Torvalds status = 1; 40201da177e4SLinus Torvalds goto out; 40211da177e4SLinus Torvalds } 4022796dadfdSJ. Bruce Fields } 40231da177e4SLinus Torvalds out: 4024b89f4321SArnd Bergmann unlock_flocks(); 40251da177e4SLinus Torvalds return status; 40261da177e4SLinus Torvalds } 40271da177e4SLinus Torvalds 4028b37ad28bSAl Viro __be32 4029b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4030b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4031b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 40321da177e4SLinus Torvalds { 40331da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 40343e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 40353e9e3dbeSNeilBrown struct nfs4_stateid *stp; 40361da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 40373e9e3dbeSNeilBrown struct list_head matches; 40383e9e3dbeSNeilBrown int i; 4039b37ad28bSAl Viro __be32 status; 40401da177e4SLinus Torvalds 40411da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 40421da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 40431da177e4SLinus Torvalds 40441da177e4SLinus Torvalds /* XXX check for lease expiration */ 40451da177e4SLinus Torvalds 40461da177e4SLinus Torvalds status = nfserr_stale_clientid; 4047849823c5SNeil Brown if (STALE_CLIENTID(clid)) 40481da177e4SLinus Torvalds return status; 40491da177e4SLinus Torvalds 40501da177e4SLinus Torvalds nfs4_lock_state(); 40511da177e4SLinus Torvalds 40521da177e4SLinus Torvalds status = nfserr_locks_held; 40533e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 40543e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 40553e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 40563e9e3dbeSNeilBrown * data structures. */ 40573e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 40583e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 40593e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 4060599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 40613e9e3dbeSNeilBrown continue; 40623e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4063ea1da636SNeilBrown st_perstateowner) { 4064f9d7562fSJ. Bruce Fields if (check_for_locks(stp->st_file, sop)) 40651da177e4SLinus Torvalds goto out; 40663e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 40673e9e3dbeSNeilBrown * so it's OK to fool with here. */ 40683e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 40691da177e4SLinus Torvalds } 40703e9e3dbeSNeilBrown } 40713e9e3dbeSNeilBrown } 40723e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 40733e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 40743e9e3dbeSNeilBrown * have been checked. */ 40751da177e4SLinus Torvalds status = nfs_ok; 40760fa822e4SNeilBrown while (!list_empty(&matches)) { 40770fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 40780fa822e4SNeilBrown so_perclient); 40790fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 40800fa822e4SNeilBrown * for openowners. */ 40810fa822e4SNeilBrown list_del(&sop->so_perclient); 4082f044ff83SJ. Bruce Fields release_lockowner(sop); 40831da177e4SLinus Torvalds } 40841da177e4SLinus Torvalds out: 40851da177e4SLinus Torvalds nfs4_unlock_state(); 40861da177e4SLinus Torvalds return status; 40871da177e4SLinus Torvalds } 40881da177e4SLinus Torvalds 40891da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4090a55370a3SNeilBrown alloc_reclaim(void) 40911da177e4SLinus Torvalds { 4092a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 40931da177e4SLinus Torvalds } 40941da177e4SLinus Torvalds 4095c7b9a459SNeilBrown int 4096a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4097c7b9a459SNeilBrown { 4098c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4099c7b9a459SNeilBrown struct nfs4_client *clp; 4100c7b9a459SNeilBrown 4101a1bcecd2SAndy Adamson clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); 4102c7b9a459SNeilBrown return clp ? 1 : 0; 4103c7b9a459SNeilBrown } 4104c7b9a459SNeilBrown 41051da177e4SLinus Torvalds /* 41061da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 41071da177e4SLinus Torvalds */ 4108190e4fbfSNeilBrown int 4109190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 41101da177e4SLinus Torvalds { 41111da177e4SLinus Torvalds unsigned int strhashval; 41121da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 41131da177e4SLinus Torvalds 4114a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4115a55370a3SNeilBrown crp = alloc_reclaim(); 41161da177e4SLinus Torvalds if (!crp) 41171da177e4SLinus Torvalds return 0; 4118a55370a3SNeilBrown strhashval = clientstr_hashval(name); 41191da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 41201da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4121a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 41221da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 41231da177e4SLinus Torvalds return 1; 41241da177e4SLinus Torvalds } 41251da177e4SLinus Torvalds 41261da177e4SLinus Torvalds static void 41271da177e4SLinus Torvalds nfs4_release_reclaim(void) 41281da177e4SLinus Torvalds { 41291da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 41301da177e4SLinus Torvalds int i; 41311da177e4SLinus Torvalds 41321da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 41331da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 41341da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 41351da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 41361da177e4SLinus Torvalds list_del(&crp->cr_strhash); 41371da177e4SLinus Torvalds kfree(crp); 41381da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 41391da177e4SLinus Torvalds } 41401da177e4SLinus Torvalds } 41411da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 41421da177e4SLinus Torvalds } 41431da177e4SLinus Torvalds 41441da177e4SLinus Torvalds /* 41451da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 4146fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 41471da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 41481da177e4SLinus Torvalds { 41491da177e4SLinus Torvalds unsigned int strhashval; 41501da177e4SLinus Torvalds struct nfs4_client *clp; 41511da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 41521da177e4SLinus Torvalds 41531da177e4SLinus Torvalds 41541da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 41551da177e4SLinus Torvalds clp = find_confirmed_client(clid); 41561da177e4SLinus Torvalds if (clp == NULL) 41571da177e4SLinus Torvalds return NULL; 41581da177e4SLinus Torvalds 4159a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4160a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4161a55370a3SNeilBrown clp->cl_recdir); 41621da177e4SLinus Torvalds 41631da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4164a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 41651da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4166a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 41671da177e4SLinus Torvalds return crp; 41681da177e4SLinus Torvalds } 41691da177e4SLinus Torvalds } 41701da177e4SLinus Torvalds return NULL; 41711da177e4SLinus Torvalds } 41721da177e4SLinus Torvalds 41731da177e4SLinus Torvalds /* 41741da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 41751da177e4SLinus Torvalds */ 4176b37ad28bSAl Viro __be32 41771da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 41781da177e4SLinus Torvalds { 4179dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 41801da177e4SLinus Torvalds } 41811da177e4SLinus Torvalds 4182ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 41831da177e4SLinus Torvalds 4184e8ff2a84SJ. Bruce Fields int 4185ac4d8ff2SNeilBrown nfs4_state_init(void) 41861da177e4SLinus Torvalds { 4187e8ff2a84SJ. Bruce Fields int i, status; 41881da177e4SLinus Torvalds 4189e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 4190e8ff2a84SJ. Bruce Fields if (status) 4191e8ff2a84SJ. Bruce Fields return status; 41921da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 41931da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 41941da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 41951da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 41961da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 419702cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 41981da177e4SLinus Torvalds } 41995282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 42005282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 42011da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 42021da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 42031da177e4SLinus Torvalds } 42041da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 42051da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 42061da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 42071da177e4SLinus Torvalds } 42081da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 42091da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 42101da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 42111da177e4SLinus Torvalds } 42121da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 42131da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 42141da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 42151da177e4SLinus Torvalds } 42161da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 42171da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 42181da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 42191da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4220ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4221e8ff2a84SJ. Bruce Fields return 0; 4222ac4d8ff2SNeilBrown } 4223ac4d8ff2SNeilBrown 4224190e4fbfSNeilBrown static void 4225190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4226190e4fbfSNeilBrown { 4227190e4fbfSNeilBrown int status; 4228190e4fbfSNeilBrown 42290964a3d3SNeilBrown nfs4_lock_state(); 42300964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 4231190e4fbfSNeilBrown status = nfsd4_recdir_load(); 42320964a3d3SNeilBrown nfs4_unlock_state(); 4233190e4fbfSNeilBrown if (status) 4234190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4235190e4fbfSNeilBrown } 4236190e4fbfSNeilBrown 4237c2f1a551SMeelap Shah /* 4238c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4239c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4240c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4241c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4242c2f1a551SMeelap Shah * 4243c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4244c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4245c2f1a551SMeelap Shah */ 4246c2f1a551SMeelap Shah static void 4247c2f1a551SMeelap Shah set_max_delegations(void) 4248c2f1a551SMeelap Shah { 4249c2f1a551SMeelap Shah /* 4250c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4251c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4252c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4253c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4254c2f1a551SMeelap Shah */ 4255c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4256c2f1a551SMeelap Shah } 4257c2f1a551SMeelap Shah 4258ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4259ac4d8ff2SNeilBrown 426029ab23ccSJ. Bruce Fields static int 4261ac4d8ff2SNeilBrown __nfs4_state_start(void) 4262ac4d8ff2SNeilBrown { 4263b5a1a81eSJ. Bruce Fields int ret; 4264b5a1a81eSJ. Bruce Fields 42651da177e4SLinus Torvalds boot_time = get_seconds(); 4266af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 42679a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4268e46b498cSJ. Bruce Fields nfsd4_grace); 4269b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4270b5a1a81eSJ. Bruce Fields if (ret) 4271b5a1a81eSJ. Bruce Fields return -ENOMEM; 427258da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 427329ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 427429ab23ccSJ. Bruce Fields return -ENOMEM; 4275b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4276b5a1a81eSJ. Bruce Fields if (ret) 4277b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4278e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4279c2f1a551SMeelap Shah set_max_delegations(); 4280b5a1a81eSJ. Bruce Fields return 0; 4281b5a1a81eSJ. Bruce Fields out_free_laundry: 4282b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4283b5a1a81eSJ. Bruce Fields return ret; 42841da177e4SLinus Torvalds } 42851da177e4SLinus Torvalds 428629ab23ccSJ. Bruce Fields int 428776a3550eSNeilBrown nfs4_state_start(void) 42881da177e4SLinus Torvalds { 4289190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 42904ad9a344SJeff Layton return __nfs4_state_start(); 42911da177e4SLinus Torvalds } 42921da177e4SLinus Torvalds 42931da177e4SLinus Torvalds static void 42941da177e4SLinus Torvalds __nfs4_state_shutdown(void) 42951da177e4SLinus Torvalds { 42961da177e4SLinus Torvalds int i; 42971da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 42981da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 42991da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 43001da177e4SLinus Torvalds 43011da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 43021da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 43031da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 43041da177e4SLinus Torvalds expire_client(clp); 43051da177e4SLinus Torvalds } 43061da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 43071da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 43081da177e4SLinus Torvalds expire_client(clp); 43091da177e4SLinus Torvalds } 43101da177e4SLinus Torvalds } 43111da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 43121da177e4SLinus Torvalds spin_lock(&recall_lock); 43131da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 43141da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 43151da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 43161da177e4SLinus Torvalds } 43171da177e4SLinus Torvalds spin_unlock(&recall_lock); 43181da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 43191da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 43201da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 43211da177e4SLinus Torvalds unhash_delegation(dp); 43221da177e4SLinus Torvalds } 43231da177e4SLinus Torvalds 4324190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 43251da177e4SLinus Torvalds } 43261da177e4SLinus Torvalds 43271da177e4SLinus Torvalds void 43281da177e4SLinus Torvalds nfs4_state_shutdown(void) 43291da177e4SLinus Torvalds { 43305e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 43315e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 43322c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 43331da177e4SLinus Torvalds nfs4_lock_state(); 43341da177e4SLinus Torvalds nfs4_release_reclaim(); 43351da177e4SLinus Torvalds __nfs4_state_shutdown(); 43361da177e4SLinus Torvalds nfs4_unlock_state(); 4337c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 43381da177e4SLinus Torvalds } 43391da177e4SLinus Torvalds 43403dd98a3bSJeff Layton /* 43413dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 43423dd98a3bSJeff Layton * accessed when nfsd is starting. 43433dd98a3bSJeff Layton */ 43440964a3d3SNeilBrown static void 43450964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 43460964a3d3SNeilBrown { 43470964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 43480964a3d3SNeilBrown } 43490964a3d3SNeilBrown 43500964a3d3SNeilBrown /* 43510964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 43520964a3d3SNeilBrown */ 43530964a3d3SNeilBrown int 43540964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 43550964a3d3SNeilBrown { 43560964a3d3SNeilBrown int status; 4357a63bb996SAl Viro struct path path; 43580964a3d3SNeilBrown 4359a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 43600964a3d3SNeilBrown if (status) 43610964a3d3SNeilBrown return status; 43620964a3d3SNeilBrown status = -ENOTDIR; 4363a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 43640964a3d3SNeilBrown nfs4_set_recdir(recdir); 43650964a3d3SNeilBrown status = 0; 43660964a3d3SNeilBrown } 4367a63bb996SAl Viro path_put(&path); 43680964a3d3SNeilBrown return status; 43690964a3d3SNeilBrown } 43700964a3d3SNeilBrown 43713dd98a3bSJeff Layton char * 43723dd98a3bSJeff Layton nfs4_recoverydir(void) 43733dd98a3bSJeff Layton { 43743dd98a3bSJeff Layton return user_recovery_dirname; 43753dd98a3bSJeff Layton } 4376