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 67621b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 677db90681dSJ. Bruce Fields { 67819cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 67921b75b01SJ. Bruce Fields return 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; 68621b75b01SJ. Bruce Fields int ret; 687db90681dSJ. Bruce Fields 688d29c374cSJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 689d29c374cSJ. Bruce Fields flags |= NFS4_CDFC4_BACK; 690d29c374cSJ. Bruce Fields conn = alloc_conn(rqstp, flags); 691db90681dSJ. Bruce Fields if (!conn) 692db90681dSJ. Bruce Fields return nfserr_jukebox; 693db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 69421b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 69521b75b01SJ. Bruce Fields if (ret) 69621b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 69721b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 698c7662518SJ. Bruce Fields return nfs_ok; 699c7662518SJ. Bruce Fields } 700c7662518SJ. Bruce Fields 70119cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 702c7662518SJ. Bruce Fields { 70319cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 70419cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 70519cf5c02SJ. Bruce Fields 70619cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 70719cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 70819cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 70919cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 71019cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 71119cf5c02SJ. Bruce Fields 71219cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 71319cf5c02SJ. Bruce Fields free_conn(c); 71419cf5c02SJ. Bruce Fields 71519cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 71619cf5c02SJ. Bruce Fields } 71719cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 718c7662518SJ. Bruce Fields } 719c7662518SJ. Bruce Fields 720c7662518SJ. Bruce Fields void free_session(struct kref *kref) 721c7662518SJ. Bruce Fields { 722c7662518SJ. Bruce Fields struct nfsd4_session *ses; 723c7662518SJ. Bruce Fields int mem; 724c7662518SJ. Bruce Fields 725c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 72619cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 727c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 728c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 729c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 730c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 731c7662518SJ. Bruce Fields free_session_slots(ses); 732c7662518SJ. Bruce Fields kfree(ses); 733c7662518SJ. Bruce Fields } 734c7662518SJ. Bruce Fields 735ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 7365b6feee9SJ. Bruce Fields { 7375b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7385b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 7395b6feee9SJ. Bruce Fields int numslots, slotsize; 740c7662518SJ. Bruce Fields int status; 7415b6feee9SJ. Bruce Fields int idx; 7425b6feee9SJ. Bruce Fields 7435b6feee9SJ. Bruce Fields /* 7445b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 7455b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 7465b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 7475b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 7485b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 7495b6feee9SJ. Bruce Fields */ 7505b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 7515b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 7525b6feee9SJ. Bruce Fields 7535b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 7545b6feee9SJ. Bruce Fields if (!new) { 7555b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 756ac7c46f2SJ. Bruce Fields return NULL; 7575b6feee9SJ. Bruce Fields } 7585b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 759ec6b5d7bSAndy Adamson 760ec6b5d7bSAndy Adamson new->se_client = clp; 761ec6b5d7bSAndy Adamson gen_sessionid(new); 762ec6b5d7bSAndy Adamson 763c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 764c7662518SJ. Bruce Fields 765ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 766ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 7678b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 768ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 7695b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 7709089f1b4SBenny Halevy spin_lock(&client_lock); 771ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 772ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 7739089f1b4SBenny Halevy spin_unlock(&client_lock); 774ec6b5d7bSAndy Adamson 775c7662518SJ. Bruce Fields status = nfsd4_new_conn(rqstp, new); 776ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 777c7662518SJ. Bruce Fields if (status) { 778c7662518SJ. Bruce Fields free_session(&new->se_ref); 779ac7c46f2SJ. Bruce Fields return NULL; 780c7662518SJ. Bruce Fields } 781edd76786SJ. Bruce Fields if (!clp->cl_cb_session && (cses->flags & SESSION4_BACK_CHAN)) { 782edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 783edd76786SJ. Bruce Fields 784edd76786SJ. Bruce Fields clp->cl_cb_session = new; 785edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_xprt = rqstp->rq_xprt; 786edd76786SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 787edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 788edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 7895a3c9d71SJ. Bruce Fields nfsd4_probe_callback(clp); 790edd76786SJ. Bruce Fields } 791ac7c46f2SJ. Bruce Fields return new; 792ec6b5d7bSAndy Adamson } 793ec6b5d7bSAndy Adamson 7949089f1b4SBenny Halevy /* caller must hold client_lock */ 7955282fd72SMarc Eshel static struct nfsd4_session * 7965282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 7975282fd72SMarc Eshel { 7985282fd72SMarc Eshel struct nfsd4_session *elem; 7995282fd72SMarc Eshel int idx; 8005282fd72SMarc Eshel 8015282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 8025282fd72SMarc Eshel idx = hash_sessionid(sessionid); 8035282fd72SMarc Eshel /* Search in the appropriate list */ 8045282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 8055282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 8065282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 8075282fd72SMarc Eshel return elem; 8085282fd72SMarc Eshel } 8095282fd72SMarc Eshel } 8105282fd72SMarc Eshel 8115282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 8125282fd72SMarc Eshel return NULL; 8135282fd72SMarc Eshel } 8145282fd72SMarc Eshel 8159089f1b4SBenny Halevy /* caller must hold client_lock */ 8167116ed6bSAndy Adamson static void 8175282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 8187116ed6bSAndy Adamson { 8197116ed6bSAndy Adamson list_del(&ses->se_hash); 8207116ed6bSAndy Adamson list_del(&ses->se_perclnt); 8215282fd72SMarc Eshel } 8225282fd72SMarc Eshel 82336acb66bSBenny Halevy /* must be called under the client_lock */ 8241da177e4SLinus Torvalds static inline void 82536acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 8261da177e4SLinus Torvalds { 82707cd4909SBenny Halevy if (is_client_expired(clp)) { 82807cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 82907cd4909SBenny Halevy __func__, 83007cd4909SBenny Halevy clp->cl_clientid.cl_boot, 83107cd4909SBenny Halevy clp->cl_clientid.cl_id); 83207cd4909SBenny Halevy return; 83307cd4909SBenny Halevy } 83407cd4909SBenny Halevy 8351da177e4SLinus Torvalds /* 8361da177e4SLinus Torvalds * Move client to the end to the LRU list. 8371da177e4SLinus Torvalds */ 8381da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 8391da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 8401da177e4SLinus Torvalds clp->cl_clientid.cl_id); 8411da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 8421da177e4SLinus Torvalds clp->cl_time = get_seconds(); 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds 84536acb66bSBenny Halevy static inline void 84636acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 84736acb66bSBenny Halevy { 84836acb66bSBenny Halevy spin_lock(&client_lock); 84936acb66bSBenny Halevy renew_client_locked(clp); 85036acb66bSBenny Halevy spin_unlock(&client_lock); 85136acb66bSBenny Halevy } 85236acb66bSBenny Halevy 8531da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 8541da177e4SLinus Torvalds static int 8551da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 8561da177e4SLinus Torvalds { 8571da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 8581da177e4SLinus Torvalds return 0; 85960adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 86060adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 8611da177e4SLinus Torvalds return 1; 8621da177e4SLinus Torvalds } 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds /* 8651da177e4SLinus Torvalds * XXX Should we use a slab cache ? 8661da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 8671da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 8681da177e4SLinus Torvalds */ 86935bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 8701da177e4SLinus Torvalds { 8711da177e4SLinus Torvalds struct nfs4_client *clp; 8721da177e4SLinus Torvalds 87335bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 87435bba9a3SJ. Bruce Fields if (clp == NULL) 87535bba9a3SJ. Bruce Fields return NULL; 87635bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 87735bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 87835bba9a3SJ. Bruce Fields kfree(clp); 87935bba9a3SJ. Bruce Fields return NULL; 88035bba9a3SJ. Bruce Fields } 8811da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 8821da177e4SLinus Torvalds clp->cl_name.len = name.len; 8831da177e4SLinus Torvalds return clp; 8841da177e4SLinus Torvalds } 8851da177e4SLinus Torvalds 8861da177e4SLinus Torvalds static inline void 8871da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 8881da177e4SLinus Torvalds { 889792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 890792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 891792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 892792c95ddSJ. Bruce Fields se_perclnt); 893792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 894792c95ddSJ. Bruce Fields nfsd4_put_session(ses); 895792c95ddSJ. Bruce Fields } 8961da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 8971da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 89868e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 8991da177e4SLinus Torvalds kfree(clp->cl_name.data); 9001da177e4SLinus Torvalds kfree(clp); 9011da177e4SLinus Torvalds } 9021da177e4SLinus Torvalds 903d7682988SBenny Halevy void 904d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 905d7682988SBenny Halevy { 906d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 907d7682988SBenny Halevy 908d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 909d7682988SBenny Halevy return; 910d7682988SBenny Halevy if (is_client_expired(clp)) { 911d7682988SBenny Halevy free_client(clp); 912d7682988SBenny Halevy session->se_client = NULL; 913d7682988SBenny Halevy } else 914d7682988SBenny Halevy renew_client_locked(clp); 915d7682988SBenny Halevy spin_unlock(&client_lock); 916d7682988SBenny Halevy } 917d7682988SBenny Halevy 91884d38ac9SBenny Halevy /* must be called under the client_lock */ 91984d38ac9SBenny Halevy static inline void 92084d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 92184d38ac9SBenny Halevy { 922792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 923792c95ddSJ. Bruce Fields 92407cd4909SBenny Halevy mark_client_expired(clp); 92584d38ac9SBenny Halevy list_del(&clp->cl_lru); 926792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 927792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 92884d38ac9SBenny Halevy } 92984d38ac9SBenny Halevy 9301da177e4SLinus Torvalds static void 9311da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 9321da177e4SLinus Torvalds { 9331da177e4SLinus Torvalds struct nfs4_stateowner *sop; 9341da177e4SLinus Torvalds struct nfs4_delegation *dp; 9351da177e4SLinus Torvalds struct list_head reaplist; 9361da177e4SLinus Torvalds 9371da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 9381da177e4SLinus Torvalds spin_lock(&recall_lock); 939ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 940ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 9411da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 9421da177e4SLinus Torvalds dp->dl_flock); 943ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 9441da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds spin_unlock(&recall_lock); 9471da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 9481da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 9491da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 9501da177e4SLinus Torvalds unhash_delegation(dp); 9511da177e4SLinus Torvalds } 952ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 953ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 954f044ff83SJ. Bruce Fields release_openowner(sop); 9551da177e4SLinus Torvalds } 9566ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 9572bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 9582bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 95984d38ac9SBenny Halevy list_del(&clp->cl_idhash); 96084d38ac9SBenny Halevy list_del(&clp->cl_strhash); 96184d38ac9SBenny Halevy spin_lock(&client_lock); 96284d38ac9SBenny Halevy unhash_client_locked(clp); 96346583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 964b12a05cbSJ. Bruce Fields free_client(clp); 96546583e25SBenny Halevy spin_unlock(&client_lock); 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 96835bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 96935bba9a3SJ. Bruce Fields { 97035bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 97135bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 9721da177e4SLinus Torvalds } 9731da177e4SLinus Torvalds 97435bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 97535bba9a3SJ. Bruce Fields { 9761da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 9771da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 9781da177e4SLinus Torvalds } 9791da177e4SLinus Torvalds 98035bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 98135bba9a3SJ. Bruce Fields { 9821da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 9831da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 9841da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 9851da177e4SLinus Torvalds get_group_info(target->cr_group_info); 9861da177e4SLinus Torvalds } 9871da177e4SLinus Torvalds 98835bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 989599e0a22SJ. Bruce Fields { 990a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 9911da177e4SLinus Torvalds } 9921da177e4SLinus Torvalds 9931da177e4SLinus Torvalds static int 994599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 995599e0a22SJ. Bruce Fields { 996599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 9971da177e4SLinus Torvalds } 9981da177e4SLinus Torvalds 9991da177e4SLinus Torvalds static int 1000599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1001599e0a22SJ. Bruce Fields { 1002599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds /* XXX what about NGROUP */ 10061da177e4SLinus Torvalds static int 1007599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1008599e0a22SJ. Bruce Fields { 1009599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 10101da177e4SLinus Torvalds } 10111da177e4SLinus Torvalds 10125ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 10135ec7b46cSJ. Bruce Fields { 10145ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 10155ec7b46cSJ. Bruce Fields 10161da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 10171da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 10181da177e4SLinus Torvalds } 10191da177e4SLinus Torvalds 1020deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1021deda2faaSJ. Bruce Fields { 1022deda2faaSJ. Bruce Fields static u32 i; 10231da177e4SLinus Torvalds u32 *p; 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 1026deda2faaSJ. Bruce Fields *p++ = get_seconds(); 1027deda2faaSJ. Bruce Fields *p++ = i++; 10281da177e4SLinus Torvalds } 10291da177e4SLinus Torvalds 1030b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1031b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1032b09333c4SRicardo Labiaga { 1033b09333c4SRicardo Labiaga struct nfs4_client *clp; 1034b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1035b09333c4SRicardo Labiaga char *princ; 1036b09333c4SRicardo Labiaga 1037b09333c4SRicardo Labiaga clp = alloc_client(name); 1038b09333c4SRicardo Labiaga if (clp == NULL) 1039b09333c4SRicardo Labiaga return NULL; 1040b09333c4SRicardo Labiaga 1041792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1042792c95ddSJ. Bruce Fields 1043b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1044b09333c4SRicardo Labiaga if (princ) { 1045b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1046b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1047b09333c4SRicardo Labiaga free_client(clp); 1048b09333c4SRicardo Labiaga return NULL; 1049b09333c4SRicardo Labiaga } 1050b09333c4SRicardo Labiaga } 1051b09333c4SRicardo Labiaga 1052b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 105346583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 10542bf23875SJ. Bruce Fields atomic_set(&clp->cl_cb_set, 0); 1055b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1056b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1057b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1058b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1059b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 10606ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1061cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 106207cd4909SBenny Halevy clp->cl_time = get_seconds(); 1063b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1064b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1065b09333c4SRicardo Labiaga copy_verf(clp, verf); 1066b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1067b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1068b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1069b09333c4SRicardo Labiaga gen_confirm(clp); 1070edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1071b09333c4SRicardo Labiaga return clp; 1072b09333c4SRicardo Labiaga } 1073b09333c4SRicardo Labiaga 107435bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 107535bba9a3SJ. Bruce Fields { 10761da177e4SLinus Torvalds if (name.len == 0) 10771da177e4SLinus Torvalds return 0; 10781da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 10792fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 10801da177e4SLinus Torvalds return 0; 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds return 1; 10831da177e4SLinus Torvalds } 10841da177e4SLinus Torvalds 1085fd39ca9aSNeilBrown static void 10861da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 10871da177e4SLinus Torvalds { 10881da177e4SLinus Torvalds unsigned int idhashval; 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 10911da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 10921da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 109336acb66bSBenny Halevy renew_client(clp); 10941da177e4SLinus Torvalds } 10951da177e4SLinus Torvalds 1096fd39ca9aSNeilBrown static void 10971da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 10981da177e4SLinus Torvalds { 10991da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 11001da177e4SLinus Torvalds unsigned int strhashval; 11011da177e4SLinus Torvalds 11021da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1103f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1104a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1105328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 11061da177e4SLinus Torvalds renew_client(clp); 11071da177e4SLinus Torvalds } 11081da177e4SLinus Torvalds 11091da177e4SLinus Torvalds static struct nfs4_client * 11101da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 11111da177e4SLinus Torvalds { 11121da177e4SLinus Torvalds struct nfs4_client *clp; 11131da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11141da177e4SLinus Torvalds 11151da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1116599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11171da177e4SLinus Torvalds return clp; 11181da177e4SLinus Torvalds } 11191da177e4SLinus Torvalds return NULL; 11201da177e4SLinus Torvalds } 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds static struct nfs4_client * 11231da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 11241da177e4SLinus Torvalds { 11251da177e4SLinus Torvalds struct nfs4_client *clp; 11261da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1129599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11301da177e4SLinus Torvalds return clp; 11311da177e4SLinus Torvalds } 11321da177e4SLinus Torvalds return NULL; 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds 1135a1bcecd2SAndy Adamson /* 1136a1bcecd2SAndy Adamson * Return 1 iff clp's clientid establishment method matches the use_exchange_id 1137a1bcecd2SAndy Adamson * parameter. Matching is based on the fact the at least one of the 1138a1bcecd2SAndy Adamson * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 1139a1bcecd2SAndy Adamson * 1140a1bcecd2SAndy Adamson * FIXME: we need to unify the clientid namespaces for nfsv4.x 1141a1bcecd2SAndy Adamson * and correctly deal with client upgrade/downgrade in EXCHANGE_ID 1142a1bcecd2SAndy Adamson * and SET_CLIENTID{,_CONFIRM} 1143a1bcecd2SAndy Adamson */ 1144a1bcecd2SAndy Adamson static inline int 1145a1bcecd2SAndy Adamson match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) 1146a1bcecd2SAndy Adamson { 1147a1bcecd2SAndy Adamson bool has_exchange_flags = (clp->cl_exchange_flags != 0); 1148a1bcecd2SAndy Adamson return use_exchange_id == has_exchange_flags; 1149a1bcecd2SAndy Adamson } 1150a1bcecd2SAndy Adamson 115128ce6054SNeilBrown static struct nfs4_client * 1152a1bcecd2SAndy Adamson find_confirmed_client_by_str(const char *dname, unsigned int hashval, 1153a1bcecd2SAndy Adamson bool use_exchange_id) 115428ce6054SNeilBrown { 115528ce6054SNeilBrown struct nfs4_client *clp; 115628ce6054SNeilBrown 115728ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1158a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 1159a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 116028ce6054SNeilBrown return clp; 116128ce6054SNeilBrown } 116228ce6054SNeilBrown return NULL; 116328ce6054SNeilBrown } 116428ce6054SNeilBrown 116528ce6054SNeilBrown static struct nfs4_client * 1166a1bcecd2SAndy Adamson find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, 1167a1bcecd2SAndy Adamson bool use_exchange_id) 116828ce6054SNeilBrown { 116928ce6054SNeilBrown struct nfs4_client *clp; 117028ce6054SNeilBrown 117128ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1172a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 1173a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 117428ce6054SNeilBrown return clp; 117528ce6054SNeilBrown } 117628ce6054SNeilBrown return NULL; 117728ce6054SNeilBrown } 117828ce6054SNeilBrown 1179fd39ca9aSNeilBrown static void 1180fbf4665fSJeff Layton gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) 11811da177e4SLinus Torvalds { 118207263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 11837077ecbaSJeff Layton unsigned short expected_family; 11841da177e4SLinus Torvalds 11857077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 11867077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 11877077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 11887077ecbaSJeff Layton expected_family = AF_INET; 11897077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 11907077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 11917077ecbaSJeff Layton expected_family = AF_INET6; 11927077ecbaSJeff Layton else 11931da177e4SLinus Torvalds goto out_err; 11941da177e4SLinus Torvalds 119507263f1eSJ. Bruce Fields conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, 1196aa9a4ec7SJeff Layton se->se_callback_addr_len, 119707263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 119807263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1199aa9a4ec7SJeff Layton 120007263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 12011da177e4SLinus Torvalds goto out_err; 1202aa9a4ec7SJeff Layton 120307263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 120407263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1205fbf4665fSJeff Layton 120607263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 120707263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 12081da177e4SLinus Torvalds return; 12091da177e4SLinus Torvalds out_err: 121007263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 121107263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1212849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 12131da177e4SLinus Torvalds "will not receive delegations\n", 12141da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 12151da177e4SLinus Torvalds 12161da177e4SLinus Torvalds return; 12171da177e4SLinus Torvalds } 12181da177e4SLinus Torvalds 1219074fe897SAndy Adamson /* 1220557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1221074fe897SAndy Adamson */ 1222074fe897SAndy Adamson void 1223074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1224074fe897SAndy Adamson { 1225557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1226557ce264SAndy Adamson unsigned int base; 1227074fe897SAndy Adamson 1228557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1229074fe897SAndy Adamson 1230557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1231557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1232bf864a31SAndy Adamson 1233bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1234557ce264SAndy Adamson slot->sl_datalen = 0; 1235bf864a31SAndy Adamson return; 1236bf864a31SAndy Adamson } 1237557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1238557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1239557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1240557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1241557ce264SAndy Adamson slot->sl_datalen)) 1242557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1243557ce264SAndy Adamson return; 1244074fe897SAndy Adamson } 1245074fe897SAndy Adamson 1246074fe897SAndy Adamson /* 1247abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1248abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1249abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1250abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1251abfabf8cSAndy Adamson * 1252074fe897SAndy Adamson */ 1253abfabf8cSAndy Adamson static __be32 1254abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1255abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1256074fe897SAndy Adamson { 1257abfabf8cSAndy Adamson struct nfsd4_op *op; 1258abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1259074fe897SAndy Adamson 1260abfabf8cSAndy Adamson dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, 1261557ce264SAndy Adamson resp->opcnt, resp->cstate.slot->sl_cachethis); 1262abfabf8cSAndy Adamson 1263abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1264abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1265abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1266abfabf8cSAndy Adamson 1267abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 1268557ce264SAndy Adamson if (args->opcnt > 1 && slot->sl_cachethis == 0) { 1269abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1270abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1271abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1272074fe897SAndy Adamson } 1273abfabf8cSAndy Adamson return op->status; 1274074fe897SAndy Adamson } 1275074fe897SAndy Adamson 1276074fe897SAndy Adamson /* 1277557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1278557ce264SAndy Adamson * session values. 1279074fe897SAndy Adamson */ 1280074fe897SAndy Adamson __be32 1281bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1282bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1283074fe897SAndy Adamson { 1284557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1285074fe897SAndy Adamson __be32 status; 1286074fe897SAndy Adamson 1287557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1288074fe897SAndy Adamson 1289abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1290abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1291abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1292abfabf8cSAndy Adamson return status; 1293074fe897SAndy Adamson 1294557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1295557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1296074fe897SAndy Adamson 1297557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1298557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1299557ce264SAndy Adamson status = slot->sl_status; 1300074fe897SAndy Adamson 1301074fe897SAndy Adamson return status; 1302074fe897SAndy Adamson } 1303074fe897SAndy Adamson 13040733d213SAndy Adamson /* 13050733d213SAndy Adamson * Set the exchange_id flags returned by the server. 13060733d213SAndy Adamson */ 13070733d213SAndy Adamson static void 13080733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 13090733d213SAndy Adamson { 13100733d213SAndy Adamson /* pNFS is not supported */ 13110733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 13120733d213SAndy Adamson 13130733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 13140733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 13150733d213SAndy Adamson 13160733d213SAndy Adamson /* set the wire flags to return to client. */ 13170733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 13180733d213SAndy Adamson } 13190733d213SAndy Adamson 1320b37ad28bSAl Viro __be32 1321069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1322069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1323069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1324069b6ad4SAndy Adamson { 13250733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 13260733d213SAndy Adamson int status; 13270733d213SAndy Adamson unsigned int strhashval; 13280733d213SAndy Adamson char dname[HEXDIR_LEN]; 1329363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 13300733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1331363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 13320733d213SAndy Adamson 1333363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 13340733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1335363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 13360733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1337363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 13380733d213SAndy Adamson 13390733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 13400733d213SAndy Adamson return nfserr_inval; 13410733d213SAndy Adamson 13420733d213SAndy Adamson /* Currently only support SP4_NONE */ 13430733d213SAndy Adamson switch (exid->spa_how) { 13440733d213SAndy Adamson case SP4_NONE: 13450733d213SAndy Adamson break; 13460733d213SAndy Adamson case SP4_SSV: 13470733d213SAndy Adamson return nfserr_encr_alg_unsupp; 13480733d213SAndy Adamson default: 13490733d213SAndy Adamson BUG(); /* checked by xdr code */ 13500733d213SAndy Adamson case SP4_MACH_CRED: 13510733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 13520733d213SAndy Adamson } 13530733d213SAndy Adamson 13540733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 13550733d213SAndy Adamson 13560733d213SAndy Adamson if (status) 13570733d213SAndy Adamson goto error; 13580733d213SAndy Adamson 13590733d213SAndy Adamson strhashval = clientstr_hashval(dname); 13600733d213SAndy Adamson 13610733d213SAndy Adamson nfs4_lock_state(); 13620733d213SAndy Adamson status = nfs_ok; 13630733d213SAndy Adamson 1364a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, true); 13650733d213SAndy Adamson if (conf) { 13660733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 13670733d213SAndy Adamson /* 18.35.4 case 8 */ 13680733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 13690733d213SAndy Adamson status = nfserr_not_same; 13700733d213SAndy Adamson goto out; 13710733d213SAndy Adamson } 13720733d213SAndy Adamson /* Client reboot: destroy old state */ 13730733d213SAndy Adamson expire_client(conf); 13740733d213SAndy Adamson goto out_new; 13750733d213SAndy Adamson } 13760733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 13770733d213SAndy Adamson /* 18.35.4 case 9 */ 13780733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 13790733d213SAndy Adamson status = nfserr_perm; 13800733d213SAndy Adamson goto out; 13810733d213SAndy Adamson } 13820733d213SAndy Adamson expire_client(conf); 13830733d213SAndy Adamson goto out_new; 13840733d213SAndy Adamson } 13850733d213SAndy Adamson /* 13860733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 13870733d213SAndy Adamson * confirmed client id (18.35.3). 13880733d213SAndy Adamson */ 13890733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 13900733d213SAndy Adamson 13910733d213SAndy Adamson /* 13920733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 13930733d213SAndy Adamson * Leave confirmed record intact and return same result. 13940733d213SAndy Adamson */ 13950733d213SAndy Adamson copy_verf(conf, &verf); 13960733d213SAndy Adamson new = conf; 13970733d213SAndy Adamson goto out_copy; 13986ddbbbfeSMike Sager } 13996ddbbbfeSMike Sager 14000733d213SAndy Adamson /* 18.35.4 case 7 */ 14010733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14020733d213SAndy Adamson status = nfserr_noent; 14030733d213SAndy Adamson goto out; 14040733d213SAndy Adamson } 14050733d213SAndy Adamson 1406a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, true); 14070733d213SAndy Adamson if (unconf) { 14080733d213SAndy Adamson /* 14090733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 14100733d213SAndy Adamson * a new unconfirmed record should be generated regardless 14110733d213SAndy Adamson * of whether any properties have changed. 14120733d213SAndy Adamson */ 14130733d213SAndy Adamson expire_client(unconf); 14140733d213SAndy Adamson } 14150733d213SAndy Adamson 14160733d213SAndy Adamson out_new: 14170733d213SAndy Adamson /* Normal case */ 1418b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 14190733d213SAndy Adamson if (new == NULL) { 14204731030dSJ. Bruce Fields status = nfserr_jukebox; 14210733d213SAndy Adamson goto out; 14220733d213SAndy Adamson } 14230733d213SAndy Adamson 14240733d213SAndy Adamson gen_clid(new); 14250733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 14260733d213SAndy Adamson out_copy: 14270733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 14280733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 14290733d213SAndy Adamson 143038eb76a5SAndy Adamson exid->seqid = 1; 14310733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 14320733d213SAndy Adamson 14330733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 143449557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 14350733d213SAndy Adamson status = nfs_ok; 14360733d213SAndy Adamson 14370733d213SAndy Adamson out: 14380733d213SAndy Adamson nfs4_unlock_state(); 14390733d213SAndy Adamson error: 14400733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 14410733d213SAndy Adamson return status; 1442069b6ad4SAndy Adamson } 1443069b6ad4SAndy Adamson 1444b85d4c01SBenny Halevy static int 144588e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1446b85d4c01SBenny Halevy { 144788e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 144888e588d5SAndy Adamson slot_seqid); 1449b85d4c01SBenny Halevy 1450b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 145188e588d5SAndy Adamson if (slot_inuse) { 145288e588d5SAndy Adamson if (seqid == slot_seqid) 1453b85d4c01SBenny Halevy return nfserr_jukebox; 1454b85d4c01SBenny Halevy else 1455b85d4c01SBenny Halevy return nfserr_seq_misordered; 1456b85d4c01SBenny Halevy } 1457b85d4c01SBenny Halevy /* Normal */ 145888e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1459b85d4c01SBenny Halevy return nfs_ok; 1460b85d4c01SBenny Halevy /* Replay */ 146188e588d5SAndy Adamson if (seqid == slot_seqid) 1462b85d4c01SBenny Halevy return nfserr_replay_cache; 1463b85d4c01SBenny Halevy /* Wraparound */ 146488e588d5SAndy Adamson if (seqid == 1 && (slot_seqid + 1) == 0) 1465b85d4c01SBenny Halevy return nfs_ok; 1466b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1467b85d4c01SBenny Halevy return nfserr_seq_misordered; 1468b85d4c01SBenny Halevy } 1469b85d4c01SBenny Halevy 147049557cc7SAndy Adamson /* 147149557cc7SAndy Adamson * Cache the create session result into the create session single DRC 147249557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 147349557cc7SAndy Adamson * Do this for solo or embedded create session operations. 147449557cc7SAndy Adamson */ 147549557cc7SAndy Adamson static void 147649557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 147749557cc7SAndy Adamson struct nfsd4_clid_slot *slot, int nfserr) 147849557cc7SAndy Adamson { 147949557cc7SAndy Adamson slot->sl_status = nfserr; 148049557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 148149557cc7SAndy Adamson } 148249557cc7SAndy Adamson 148349557cc7SAndy Adamson static __be32 148449557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 148549557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 148649557cc7SAndy Adamson { 148749557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 148849557cc7SAndy Adamson return slot->sl_status; 148949557cc7SAndy Adamson } 149049557cc7SAndy Adamson 1491069b6ad4SAndy Adamson __be32 1492069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1493069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1494069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1495069b6ad4SAndy Adamson { 1496363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1497ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1498ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 149949557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 150086c3e16cSJ. Bruce Fields bool confirm_me = false; 1501ec6b5d7bSAndy Adamson int status = 0; 1502ec6b5d7bSAndy Adamson 1503ec6b5d7bSAndy Adamson nfs4_lock_state(); 1504ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1505ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1506ec6b5d7bSAndy Adamson 1507ec6b5d7bSAndy Adamson if (conf) { 150849557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 150949557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 151038eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1511ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 151249557cc7SAndy Adamson cs_slot->sl_seqid); 151338eb76a5SAndy Adamson /* Return the cached reply status */ 151449557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 151538eb76a5SAndy Adamson goto out; 151649557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1517ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1518ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1519ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 152049557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1521ec6b5d7bSAndy Adamson goto out; 1522ec6b5d7bSAndy Adamson } 1523ec6b5d7bSAndy Adamson } else if (unconf) { 1524ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1525363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1526ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1527ec6b5d7bSAndy Adamson goto out; 1528ec6b5d7bSAndy Adamson } 1529ec6b5d7bSAndy Adamson 153049557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 153149557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 153238eb76a5SAndy Adamson if (status) { 153338eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1534ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1535cd5b8144SJ. Bruce Fields goto out; 1536ec6b5d7bSAndy Adamson } 1537ec6b5d7bSAndy Adamson 153886c3e16cSJ. Bruce Fields confirm_me = true; 1539ec6b5d7bSAndy Adamson conf = unconf; 1540ec6b5d7bSAndy Adamson } else { 1541ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1542ec6b5d7bSAndy Adamson goto out; 1543ec6b5d7bSAndy Adamson } 1544ec6b5d7bSAndy Adamson 1545408b79bcSJ. Bruce Fields /* 15468323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 15478323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 15488323c3b2SJ. Bruce Fields */ 15498323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 15508323c3b2SJ. Bruce Fields /* 1551408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1552408b79bcSJ. Bruce Fields */ 1553408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1554408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1555408b79bcSJ. Bruce Fields 1556ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1557ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1558ac7c46f2SJ. Bruce Fields if (!new) 1559ec6b5d7bSAndy Adamson goto out; 1560ac7c46f2SJ. Bruce Fields status = nfs_ok; 1561ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1562ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 156386c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 156449557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1565ec6b5d7bSAndy Adamson 156649557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 156749557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 156886c3e16cSJ. Bruce Fields if (confirm_me) 156986c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1570ec6b5d7bSAndy Adamson out: 1571ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1572ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1573ec6b5d7bSAndy Adamson return status; 1574069b6ad4SAndy Adamson } 1575069b6ad4SAndy Adamson 157657716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 157757716355SJ. Bruce Fields { 157857716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 157957716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 158057716355SJ. Bruce Fields 158157716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 158257716355SJ. Bruce Fields } 158357716355SJ. Bruce Fields 15845d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 15855d4cec2fSJ. Bruce Fields { 15865d4cec2fSJ. Bruce Fields if (!session) 15875d4cec2fSJ. Bruce Fields return 0; 15885d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 15895d4cec2fSJ. Bruce Fields } 15905d4cec2fSJ. Bruce Fields 1591069b6ad4SAndy Adamson __be32 1592069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1593069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1594069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1595069b6ad4SAndy Adamson { 1596e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1597e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1598e10e0cfcSBenny Halevy 1599e10e0cfcSBenny Halevy /* Notes: 1600e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1601e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1602e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1603e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1604e10e0cfcSBenny Halevy */ 1605e10e0cfcSBenny Halevy 16065d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 160757716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 160857716355SJ. Bruce Fields return nfserr_not_only_op; 160957716355SJ. Bruce Fields } 1610e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 16119089f1b4SBenny Halevy spin_lock(&client_lock); 1612e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1613e10e0cfcSBenny Halevy if (!ses) { 16149089f1b4SBenny Halevy spin_unlock(&client_lock); 1615e10e0cfcSBenny Halevy goto out; 1616e10e0cfcSBenny Halevy } 1617e10e0cfcSBenny Halevy 1618e10e0cfcSBenny Halevy unhash_session(ses); 16199089f1b4SBenny Halevy spin_unlock(&client_lock); 1620e10e0cfcSBenny Halevy 1621ab707e15SBenny Halevy nfs4_lock_state(); 1622e10e0cfcSBenny Halevy /* wait for callbacks */ 16236ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(ses->se_client); 1624ab707e15SBenny Halevy nfs4_unlock_state(); 162519cf5c02SJ. Bruce Fields 162619cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 162719cf5c02SJ. Bruce Fields 1628e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1629e10e0cfcSBenny Halevy status = nfs_ok; 1630e10e0cfcSBenny Halevy out: 1631e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1632e10e0cfcSBenny Halevy return status; 1633069b6ad4SAndy Adamson } 1634069b6ad4SAndy Adamson 1635a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1636328ead28SJ. Bruce Fields { 1637328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1638328ead28SJ. Bruce Fields 1639328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1640a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1641328ead28SJ. Bruce Fields return c; 1642328ead28SJ. Bruce Fields } 1643328ead28SJ. Bruce Fields } 1644328ead28SJ. Bruce Fields return NULL; 1645328ead28SJ. Bruce Fields } 1646328ead28SJ. Bruce Fields 1647a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1648328ead28SJ. Bruce Fields { 1649328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1650a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 165121b75b01SJ. Bruce Fields int ret; 1652328ead28SJ. Bruce Fields 1653328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1654a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1655328ead28SJ. Bruce Fields if (c) { 1656328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1657328ead28SJ. Bruce Fields free_conn(new); 1658328ead28SJ. Bruce Fields return; 1659328ead28SJ. Bruce Fields } 1660328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1661328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 166221b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 166321b75b01SJ. Bruce Fields if (ret) 166421b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 166521b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1666328ead28SJ. Bruce Fields return; 1667328ead28SJ. Bruce Fields } 1668328ead28SJ. Bruce Fields 1669069b6ad4SAndy Adamson __be32 1670b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1671069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1672069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1673069b6ad4SAndy Adamson { 1674f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1675b85d4c01SBenny Halevy struct nfsd4_session *session; 1676b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1677a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 1678b85d4c01SBenny Halevy int status; 1679b85d4c01SBenny Halevy 1680f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1681f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1682f9bb94c4SAndy Adamson 1683a663bdd8SJ. Bruce Fields /* 1684a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1685a663bdd8SJ. Bruce Fields * below. 1686a663bdd8SJ. Bruce Fields */ 1687a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1688a663bdd8SJ. Bruce Fields if (!conn) 1689a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1690a663bdd8SJ. Bruce Fields 16919089f1b4SBenny Halevy spin_lock(&client_lock); 1692b85d4c01SBenny Halevy status = nfserr_badsession; 1693b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1694b85d4c01SBenny Halevy if (!session) 1695b85d4c01SBenny Halevy goto out; 1696b85d4c01SBenny Halevy 1697b85d4c01SBenny Halevy status = nfserr_badslot; 16986c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1699b85d4c01SBenny Halevy goto out; 1700b85d4c01SBenny Halevy 1701557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1702b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1703b85d4c01SBenny Halevy 1704a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1705a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1706a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1707a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1708a8dfdaebSAndy Adamson 170988e588d5SAndy Adamson status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); 1710b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1711b85d4c01SBenny Halevy cstate->slot = slot; 1712b85d4c01SBenny Halevy cstate->session = session; 1713da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1714557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1715bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1716da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1717aaf84eb9SBenny Halevy goto out; 1718b85d4c01SBenny Halevy } 1719b85d4c01SBenny Halevy if (status) 1720b85d4c01SBenny Halevy goto out; 1721b85d4c01SBenny Halevy 1722a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 1723a663bdd8SJ. Bruce Fields conn = NULL; 1724328ead28SJ. Bruce Fields 1725b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1726b85d4c01SBenny Halevy slot->sl_inuse = true; 1727b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1728557ce264SAndy Adamson slot->sl_cachethis = seq->cachethis; 1729b85d4c01SBenny Halevy 1730b85d4c01SBenny Halevy cstate->slot = slot; 1731b85d4c01SBenny Halevy cstate->session = session; 1732b85d4c01SBenny Halevy 1733b85d4c01SBenny Halevy out: 173426c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 1735aaf84eb9SBenny Halevy if (cstate->session) { 173636acb66bSBenny Halevy nfsd4_get_session(cstate->session); 1737d7682988SBenny Halevy atomic_inc(&session->se_client->cl_refcount); 1738aaf84eb9SBenny Halevy } 1739a663bdd8SJ. Bruce Fields kfree(conn); 174036acb66bSBenny Halevy spin_unlock(&client_lock); 1741b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1742b85d4c01SBenny Halevy return status; 1743069b6ad4SAndy Adamson } 1744069b6ad4SAndy Adamson 1745069b6ad4SAndy Adamson __be32 17464dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 17474dc6ec00SJ. Bruce Fields { 17484dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 17494dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 17504dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 17514dc6ec00SJ. Bruce Fields /* 17524dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 17534dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 17544dc6ec00SJ. Bruce Fields */ 17554dc6ec00SJ. Bruce Fields return nfs_ok; 17564dc6ec00SJ. Bruce Fields } 17574dc6ec00SJ. Bruce Fields nfs4_lock_state(); 17584dc6ec00SJ. Bruce Fields if (is_client_expired(cstate->session->se_client)) { 17594dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 17604dc6ec00SJ. Bruce Fields /* 17614dc6ec00SJ. Bruce Fields * The following error isn't really legal. 17624dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 17634dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 17644dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 17654dc6ec00SJ. Bruce Fields * client. 17664dc6ec00SJ. Bruce Fields */ 17674dc6ec00SJ. Bruce Fields return nfserr_stale_clientid; 17684dc6ec00SJ. Bruce Fields } 17694dc6ec00SJ. Bruce Fields nfsd4_create_clid_dir(cstate->session->se_client); 17704dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 17714dc6ec00SJ. Bruce Fields return nfs_ok; 17724dc6ec00SJ. Bruce Fields } 17734dc6ec00SJ. Bruce Fields 17744dc6ec00SJ. Bruce Fields __be32 1775b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1776b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 17771da177e4SLinus Torvalds { 1778363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 17791da177e4SLinus Torvalds struct xdr_netobj clname = { 17801da177e4SLinus Torvalds .len = setclid->se_namelen, 17811da177e4SLinus Torvalds .data = setclid->se_name, 17821da177e4SLinus Torvalds }; 17831da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 17841da177e4SLinus Torvalds unsigned int strhashval; 178528ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1786b37ad28bSAl Viro __be32 status; 1787a55370a3SNeilBrown char dname[HEXDIR_LEN]; 17881da177e4SLinus Torvalds 17891da177e4SLinus Torvalds if (!check_name(clname)) 179073aea4ecSNeil Brown return nfserr_inval; 17911da177e4SLinus Torvalds 1792a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1793a55370a3SNeilBrown if (status) 179473aea4ecSNeil Brown return status; 1795a55370a3SNeilBrown 17961da177e4SLinus Torvalds /* 17971da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 17981da177e4SLinus Torvalds * We get here on a DRC miss. 17991da177e4SLinus Torvalds */ 18001da177e4SLinus Torvalds 1801a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 18021da177e4SLinus Torvalds 18031da177e4SLinus Torvalds nfs4_lock_state(); 1804a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, false); 180528ce6054SNeilBrown if (conf) { 1806a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 18071da177e4SLinus Torvalds status = nfserr_clid_inuse; 1808026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1809363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 1810363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 1811363168b4SJeff Layton sizeof(addr_str)); 1812026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 1813363168b4SJeff Layton "at %s\n", addr_str); 18141da177e4SLinus Torvalds goto out; 18151da177e4SLinus Torvalds } 18161da177e4SLinus Torvalds } 1817a186e767SJ. Bruce Fields /* 1818a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1819a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1820a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1821a186e767SJ. Bruce Fields */ 1822a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, false); 18231da177e4SLinus Torvalds status = nfserr_resource; 18241da177e4SLinus Torvalds if (!conf) { 18251da177e4SLinus Torvalds /* 1826a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1827a186e767SJ. Bruce Fields * placed first, because it is the normal case 18281da177e4SLinus Torvalds */ 18291da177e4SLinus Torvalds if (unconf) 18301da177e4SLinus Torvalds expire_client(unconf); 1831b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1832a55370a3SNeilBrown if (new == NULL) 18331da177e4SLinus Torvalds goto out; 18341da177e4SLinus Torvalds gen_clid(new); 1835599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 18361da177e4SLinus Torvalds /* 1837a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1838a186e767SJ. Bruce Fields * probable callback update 18391da177e4SLinus Torvalds */ 184031f4a6c1SNeilBrown if (unconf) { 184131f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 184231f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 184331f4a6c1SNeilBrown * This has the advantage that there is at most 184431f4a6c1SNeilBrown * one {*x***} in either list at any time. 184531f4a6c1SNeilBrown */ 18461da177e4SLinus Torvalds expire_client(unconf); 18471da177e4SLinus Torvalds } 1848b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1849a55370a3SNeilBrown if (new == NULL) 18501da177e4SLinus Torvalds goto out; 18511da177e4SLinus Torvalds copy_clid(new, conf); 18521da177e4SLinus Torvalds } else if (!unconf) { 18531da177e4SLinus Torvalds /* 1854a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 1855a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1856a186e767SJ. Bruce Fields * confirmed. 18571da177e4SLinus Torvalds */ 1858b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1859a55370a3SNeilBrown if (new == NULL) 18601da177e4SLinus Torvalds goto out; 18611da177e4SLinus Torvalds gen_clid(new); 186249ba8781SJ. Bruce Fields } else { 18631da177e4SLinus Torvalds /* 1864a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 1865a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1866a186e767SJ. Bruce Fields * confirmed. 18671da177e4SLinus Torvalds */ 18681da177e4SLinus Torvalds expire_client(unconf); 1869b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1870a55370a3SNeilBrown if (new == NULL) 18711da177e4SLinus Torvalds goto out; 18721da177e4SLinus Torvalds gen_clid(new); 18731da177e4SLinus Torvalds } 18748323c3b2SJ. Bruce Fields /* 18758323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 18768323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 18778323c3b2SJ. Bruce Fields */ 18788323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 1879fbf4665fSJeff Layton gen_callback(new, setclid, rpc_get_scope_id(sa)); 1880c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 18811da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 18821da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 18831da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 18841da177e4SLinus Torvalds status = nfs_ok; 18851da177e4SLinus Torvalds out: 18861da177e4SLinus Torvalds nfs4_unlock_state(); 18871da177e4SLinus Torvalds return status; 18881da177e4SLinus Torvalds } 18891da177e4SLinus Torvalds 18901da177e4SLinus Torvalds 18911da177e4SLinus Torvalds /* 1892a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 1893a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 1894a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 18951da177e4SLinus Torvalds */ 1896b37ad28bSAl Viro __be32 1897b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 1898b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 1899b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 19001da177e4SLinus Torvalds { 1901363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 190221ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 19031da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 19041da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 1905b37ad28bSAl Viro __be32 status; 19061da177e4SLinus Torvalds 19071da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 19081da177e4SLinus Torvalds return nfserr_stale_clientid; 19091da177e4SLinus Torvalds /* 19101da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 19111da177e4SLinus Torvalds * We get here on a DRC miss. 19121da177e4SLinus Torvalds */ 19131da177e4SLinus Torvalds 19141da177e4SLinus Torvalds nfs4_lock_state(); 191521ab45a4SNeilBrown 191621ab45a4SNeilBrown conf = find_confirmed_client(clid); 191721ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 191821ab45a4SNeilBrown 191922de4d83SNeilBrown status = nfserr_clid_inuse; 1920363168b4SJeff Layton if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) 19211da177e4SLinus Torvalds goto out; 1922363168b4SJeff Layton if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) 19231da177e4SLinus Torvalds goto out; 192421ab45a4SNeilBrown 1925a186e767SJ. Bruce Fields /* 1926a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 1927a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 1928a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 1929a186e767SJ. Bruce Fields */ 1930366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 1931a186e767SJ. Bruce Fields /* 1932a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 1933a186e767SJ. Bruce Fields * callback update 19347c79f737SNeilBrown */ 1935599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 19361da177e4SLinus Torvalds status = nfserr_clid_inuse; 19371da177e4SLinus Torvalds else { 19382bf23875SJ. Bruce Fields atomic_set(&conf->cl_cb_set, 0); 19395a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 19405a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 19411a69c179SNeilBrown expire_client(unconf); 19421da177e4SLinus Torvalds status = nfs_ok; 19431a69c179SNeilBrown 19441da177e4SLinus Torvalds } 1945f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 1946a186e767SJ. Bruce Fields /* 1947a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 1948a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 1949a186e767SJ. Bruce Fields * do nothing. 19507c79f737SNeilBrown */ 1951599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 19521da177e4SLinus Torvalds status = nfserr_clid_inuse; 195321ab45a4SNeilBrown else 19541da177e4SLinus Torvalds status = nfs_ok; 19557c79f737SNeilBrown } else if (!conf && unconf 1956599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 1957a186e767SJ. Bruce Fields /* 1958a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 1959a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 19601da177e4SLinus Torvalds */ 1961599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 19621da177e4SLinus Torvalds status = nfserr_clid_inuse; 19631da177e4SLinus Torvalds } else { 19641a69c179SNeilBrown unsigned int hash = 19651a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 19661a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 1967a1bcecd2SAndy Adamson hash, false); 19681a69c179SNeilBrown if (conf) { 1969c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 19701a69c179SNeilBrown expire_client(conf); 19711a69c179SNeilBrown } 19721da177e4SLinus Torvalds move_to_confirmed(unconf); 197321ab45a4SNeilBrown conf = unconf; 19745a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 19751a69c179SNeilBrown status = nfs_ok; 19761da177e4SLinus Torvalds } 1977599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 1978599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 19797c79f737SNeilBrown &confirm)))) { 1980a186e767SJ. Bruce Fields /* 1981a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 1982a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 19831da177e4SLinus Torvalds */ 19841da177e4SLinus Torvalds status = nfserr_stale_clientid; 19857c79f737SNeilBrown } else { 19861da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 198722de4d83SNeilBrown status = nfserr_clid_inuse; 198808e8987cSNeilBrown } 19891da177e4SLinus Torvalds out: 19901da177e4SLinus Torvalds nfs4_unlock_state(); 19911da177e4SLinus Torvalds return status; 19921da177e4SLinus Torvalds } 19931da177e4SLinus Torvalds 19941da177e4SLinus Torvalds /* OPEN Share state helper functions */ 19951da177e4SLinus Torvalds static inline struct nfs4_file * 19961da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 19971da177e4SLinus Torvalds { 19981da177e4SLinus Torvalds struct nfs4_file *fp; 19991da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 20001da177e4SLinus Torvalds 2001e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 2002e60d4398SNeilBrown if (fp) { 20038b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 20041da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 20058beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 20068beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 20071da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 20081da177e4SLinus Torvalds fp->fi_id = current_fileid++; 200947f9940cSMeelap Shah fp->fi_had_conflict = false; 2010f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2011f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 201247cee541SPavel Emelyanov spin_lock(&recall_lock); 201347cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 201447cee541SPavel Emelyanov spin_unlock(&recall_lock); 20151da177e4SLinus Torvalds return fp; 20161da177e4SLinus Torvalds } 20171da177e4SLinus Torvalds return NULL; 20181da177e4SLinus Torvalds } 20191da177e4SLinus Torvalds 20201da177e4SLinus Torvalds static void 2021e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2022e60d4398SNeilBrown { 2023e60d4398SNeilBrown if (*slab == NULL) 2024e60d4398SNeilBrown return; 20251a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2026e60d4398SNeilBrown *slab = NULL; 2027e60d4398SNeilBrown } 2028e60d4398SNeilBrown 2029e8ff2a84SJ. Bruce Fields void 2030e60d4398SNeilBrown nfsd4_free_slabs(void) 2031e60d4398SNeilBrown { 2032e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 2033e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 20345ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 20355b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2036e60d4398SNeilBrown } 20371da177e4SLinus Torvalds 20381da177e4SLinus Torvalds static int 20391da177e4SLinus Torvalds nfsd4_init_slabs(void) 20401da177e4SLinus Torvalds { 20411da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 204220c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 2043e60d4398SNeilBrown if (stateowner_slab == NULL) 2044e60d4398SNeilBrown goto out_nomem; 2045e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 204620c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2047e60d4398SNeilBrown if (file_slab == NULL) 2048e60d4398SNeilBrown goto out_nomem; 20495ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 205020c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 20515ac049acSNeilBrown if (stateid_slab == NULL) 20525ac049acSNeilBrown goto out_nomem; 20535b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 205420c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 20555b2d21c1SNeilBrown if (deleg_slab == NULL) 20565b2d21c1SNeilBrown goto out_nomem; 2057e60d4398SNeilBrown return 0; 2058e60d4398SNeilBrown out_nomem: 2059e60d4398SNeilBrown nfsd4_free_slabs(); 20601da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 20611da177e4SLinus Torvalds return -ENOMEM; 20621da177e4SLinus Torvalds } 20631da177e4SLinus Torvalds 20641da177e4SLinus Torvalds void 20651da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 20661da177e4SLinus Torvalds { 20671da177e4SLinus Torvalds struct nfs4_stateowner *sop = 20681da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 20691da177e4SLinus Torvalds kfree(sop->so_owner.data); 20701da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 20711da177e4SLinus Torvalds } 20721da177e4SLinus Torvalds 20731da177e4SLinus Torvalds static inline struct nfs4_stateowner * 20741da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 20751da177e4SLinus Torvalds { 20761da177e4SLinus Torvalds struct nfs4_stateowner *sop; 20771da177e4SLinus Torvalds 20781da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 20791da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 20801da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 20811da177e4SLinus Torvalds sop->so_owner.len = owner->len; 20821da177e4SLinus Torvalds kref_init(&sop->so_ref); 20831da177e4SLinus Torvalds return sop; 20841da177e4SLinus Torvalds } 20851da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 20861da177e4SLinus Torvalds } 20871da177e4SLinus Torvalds return NULL; 20881da177e4SLinus Torvalds } 20891da177e4SLinus Torvalds 20901da177e4SLinus Torvalds static struct nfs4_stateowner * 20911da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 20921da177e4SLinus Torvalds struct nfs4_stateowner *sop; 20931da177e4SLinus Torvalds struct nfs4_replay *rp; 20941da177e4SLinus Torvalds unsigned int idhashval; 20951da177e4SLinus Torvalds 20961da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 20971da177e4SLinus Torvalds return NULL; 20981da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 20991da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 21001da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 21011da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2102ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2103ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 21041da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 21051da177e4SLinus Torvalds sop->so_time = 0; 21061da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 21071da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 2108ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 21091da177e4SLinus Torvalds sop->so_is_open_owner = 1; 21101da177e4SLinus Torvalds sop->so_id = current_ownerid++; 21111da177e4SLinus Torvalds sop->so_client = clp; 21121da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 21131da177e4SLinus Torvalds sop->so_confirmed = 0; 21141da177e4SLinus Torvalds rp = &sop->so_replay; 2115de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 21161da177e4SLinus Torvalds rp->rp_buflen = 0; 21171da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 21181da177e4SLinus Torvalds return sop; 21191da177e4SLinus Torvalds } 21201da177e4SLinus Torvalds 21211da177e4SLinus Torvalds static inline void 21221da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 21231da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 21241da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 21251da177e4SLinus Torvalds 21261da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 2127ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2128ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 21291da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 21301da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 2131ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 21328beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 21331da177e4SLinus Torvalds stp->st_stateowner = sop; 213413cd2184SNeilBrown get_nfs4_file(fp); 21351da177e4SLinus Torvalds stp->st_file = fp; 2136e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 21371da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 21381da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 21391da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 21401da177e4SLinus Torvalds stp->st_access_bmap = 0; 21411da177e4SLinus Torvalds stp->st_deny_bmap = 0; 214284459a11SAndy Adamson __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, 214384459a11SAndy Adamson &stp->st_access_bmap); 21441da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 21454c4cd222SNeilBrown stp->st_openstp = NULL; 21461da177e4SLinus Torvalds } 21471da177e4SLinus Torvalds 21481da177e4SLinus Torvalds static void 21491da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 21501da177e4SLinus Torvalds { 21511da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 21521da177e4SLinus Torvalds 2153358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 21541da177e4SLinus Torvalds sop->so_time = get_seconds(); 21551da177e4SLinus Torvalds } 21561da177e4SLinus Torvalds 21571da177e4SLinus Torvalds static int 2158599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2159599e0a22SJ. Bruce Fields clientid_t *clid) 2160599e0a22SJ. Bruce Fields { 2161599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2162599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2163599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 21641da177e4SLinus Torvalds } 21651da177e4SLinus Torvalds 21661da177e4SLinus Torvalds static struct nfs4_stateowner * 21671da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 21681da177e4SLinus Torvalds { 21691da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 21701da177e4SLinus Torvalds 21711da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 2172599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 21731da177e4SLinus Torvalds return so; 21741da177e4SLinus Torvalds } 21751da177e4SLinus Torvalds return NULL; 21761da177e4SLinus Torvalds } 21771da177e4SLinus Torvalds 21781da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 21791da177e4SLinus Torvalds static struct nfs4_file * 21801da177e4SLinus Torvalds find_file(struct inode *ino) 21811da177e4SLinus Torvalds { 21821da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 21831da177e4SLinus Torvalds struct nfs4_file *fp; 21841da177e4SLinus Torvalds 21858b671b80SJ. Bruce Fields spin_lock(&recall_lock); 21861da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 218713cd2184SNeilBrown if (fp->fi_inode == ino) { 218813cd2184SNeilBrown get_nfs4_file(fp); 21898b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 21901da177e4SLinus Torvalds return fp; 21911da177e4SLinus Torvalds } 219213cd2184SNeilBrown } 21938b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 21941da177e4SLinus Torvalds return NULL; 21951da177e4SLinus Torvalds } 21961da177e4SLinus Torvalds 2197d87a8adeSAndy Adamson static inline int access_valid(u32 x, u32 minorversion) 2198ba5a6a19SJ. Bruce Fields { 2199d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) 22008838dc43SJ. Bruce Fields return 0; 2201d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) 2202d87a8adeSAndy Adamson return 0; 2203d87a8adeSAndy Adamson x &= ~NFS4_SHARE_ACCESS_MASK; 2204d87a8adeSAndy Adamson if (minorversion && x) { 2205d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) 2206d87a8adeSAndy Adamson return 0; 2207d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) 2208d87a8adeSAndy Adamson return 0; 2209d87a8adeSAndy Adamson x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); 2210d87a8adeSAndy Adamson } 2211d87a8adeSAndy Adamson if (x) 22128838dc43SJ. Bruce Fields return 0; 22138838dc43SJ. Bruce Fields return 1; 2214ba5a6a19SJ. Bruce Fields } 2215ba5a6a19SJ. Bruce Fields 22168838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 2217ba5a6a19SJ. Bruce Fields { 22188838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 22198838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 2220ba5a6a19SJ. Bruce Fields } 22211da177e4SLinus Torvalds 22224f83aa30SJ. Bruce Fields /* 22231da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 22241da177e4SLinus Torvalds * WRITE with all zero or all one stateid 22251da177e4SLinus Torvalds */ 2226b37ad28bSAl Viro static __be32 22271da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 22281da177e4SLinus Torvalds { 22291da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 22301da177e4SLinus Torvalds struct nfs4_file *fp; 22311da177e4SLinus Torvalds struct nfs4_stateid *stp; 2232b37ad28bSAl Viro __be32 ret; 22331da177e4SLinus Torvalds 22341da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 22351da177e4SLinus Torvalds 22361da177e4SLinus Torvalds fp = find_file(ino); 223713cd2184SNeilBrown if (!fp) 223813cd2184SNeilBrown return nfs_ok; 2239b700949bSNeilBrown ret = nfserr_locked; 22401da177e4SLinus Torvalds /* Search for conflicting share reservations */ 22418beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 22421da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 22431da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 224413cd2184SNeilBrown goto out; 22451da177e4SLinus Torvalds } 224613cd2184SNeilBrown ret = nfs_ok; 224713cd2184SNeilBrown out: 224813cd2184SNeilBrown put_nfs4_file(fp); 224913cd2184SNeilBrown return ret; 22501da177e4SLinus Torvalds } 22511da177e4SLinus Torvalds 22521da177e4SLinus Torvalds static inline void 2253f9d7562fSJ. Bruce Fields nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access) 22541da177e4SLinus Torvalds { 2255f9d7562fSJ. Bruce Fields if (share_access & NFS4_SHARE_ACCESS_WRITE) 2256f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, O_WRONLY); 2257f9d7562fSJ. Bruce Fields if (share_access & NFS4_SHARE_ACCESS_READ) 2258f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, O_RDONLY); 22591da177e4SLinus Torvalds } 22601da177e4SLinus Torvalds 22611da177e4SLinus Torvalds /* 22621da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 22631da177e4SLinus Torvalds * by the lease (file_lock) 22641da177e4SLinus Torvalds * 22651da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 22661da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 22671da177e4SLinus Torvalds * lease. 22681da177e4SLinus Torvalds */ 22691da177e4SLinus Torvalds static 22701da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 22711da177e4SLinus Torvalds { 22721da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 22731da177e4SLinus Torvalds 22741da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 22751da177e4SLinus Torvalds if (!dp) 22761da177e4SLinus Torvalds return; 22771da177e4SLinus Torvalds 22781da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 22791da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 22801da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 22811da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 22821da177e4SLinus Torvalds * it's safe to take a reference: */ 22831da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 22841da177e4SLinus Torvalds 22851da177e4SLinus Torvalds spin_lock(&recall_lock); 22861da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 22871da177e4SLinus Torvalds spin_unlock(&recall_lock); 22881da177e4SLinus Torvalds 22891da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 22901da177e4SLinus Torvalds dp->dl_time = get_seconds(); 22911da177e4SLinus Torvalds 22920272e1fdSJ. Bruce Fields /* 22930272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 22940272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 22950272e1fdSJ. Bruce Fields * in time. 22960272e1fdSJ. Bruce Fields */ 22970272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 22981da177e4SLinus Torvalds 229963e4863fSJ. Bruce Fields dp->dl_file->fi_had_conflict = true; 230063e4863fSJ. Bruce Fields nfsd4_cb_recall(dp); 23011da177e4SLinus Torvalds } 23021da177e4SLinus Torvalds 23031da177e4SLinus Torvalds /* 23041da177e4SLinus Torvalds * The file_lock is being reapd. 23051da177e4SLinus Torvalds * 23061da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 23071da177e4SLinus Torvalds */ 23081da177e4SLinus Torvalds static 23091da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 23101da177e4SLinus Torvalds { 23111da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 23121da177e4SLinus Torvalds 23131da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 23141da177e4SLinus Torvalds 23151da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 23161da177e4SLinus Torvalds return; 23171da177e4SLinus Torvalds dp->dl_flock = NULL; 23181da177e4SLinus Torvalds } 23191da177e4SLinus Torvalds 23201da177e4SLinus Torvalds /* 2321a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 23221da177e4SLinus Torvalds */ 23231da177e4SLinus Torvalds static 23241da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 23251da177e4SLinus Torvalds { 23261da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 23271da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 23281da177e4SLinus Torvalds struct nfs4_delegation *tryd = 23291da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 23301da177e4SLinus Torvalds 23311da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 23321da177e4SLinus Torvalds return 0; 23331da177e4SLinus Torvalds 23341da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 23351da177e4SLinus Torvalds } 23361da177e4SLinus Torvalds 23371da177e4SLinus Torvalds 23381da177e4SLinus Torvalds static 23391da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 23401da177e4SLinus Torvalds { 23411da177e4SLinus Torvalds if (arg & F_UNLCK) 23421da177e4SLinus Torvalds return lease_modify(onlist, arg); 23431da177e4SLinus Torvalds else 23441da177e4SLinus Torvalds return -EAGAIN; 23451da177e4SLinus Torvalds } 23461da177e4SLinus Torvalds 23477b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 23481da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 23491da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 23501da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 23511da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 23521da177e4SLinus Torvalds }; 23531da177e4SLinus Torvalds 23541da177e4SLinus Torvalds 2355b37ad28bSAl Viro __be32 23566668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 23576668958fSAndy Adamson struct nfsd4_open *open) 23581da177e4SLinus Torvalds { 23591da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 23601da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 23611da177e4SLinus Torvalds unsigned int strhashval; 23621da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 23631da177e4SLinus Torvalds 23641da177e4SLinus Torvalds if (!check_name(open->op_owner)) 23650f442aa2SJ. Bruce Fields return nfserr_inval; 23661da177e4SLinus Torvalds 23671da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 23681da177e4SLinus Torvalds return nfserr_stale_clientid; 23691da177e4SLinus Torvalds 23701da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 23711da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 23721da177e4SLinus Torvalds open->op_stateowner = sop; 23730f442aa2SJ. Bruce Fields if (!sop) { 23740f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 23750f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 23760f442aa2SJ. Bruce Fields if (clp == NULL) 23770f442aa2SJ. Bruce Fields return nfserr_expired; 23780f442aa2SJ. Bruce Fields goto renew; 23790f442aa2SJ. Bruce Fields } 23806668958fSAndy Adamson /* When sessions are used, skip open sequenceid processing */ 23816668958fSAndy Adamson if (nfsd4_has_session(cstate)) 23826668958fSAndy Adamson goto renew; 2383ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 23840f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2385ae8b6253SJ. Bruce Fields clp = sop->so_client; 2386f044ff83SJ. Bruce Fields release_openowner(sop); 23870f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 2388ae8b6253SJ. Bruce Fields goto renew; 23890f442aa2SJ. Bruce Fields } 23900f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 23911da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 2392a90b061cSAl Viro return nfserr_replay_me; 23931da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 23941da177e4SLinus Torvalds * that we don't even have replay data saved! 23951da177e4SLinus Torvalds * Therefore, we have no choice but to continue 23961da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 23971da177e4SLinus Torvalds * fail again for the same reason. 23981da177e4SLinus Torvalds */ 23990f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 24001da177e4SLinus Torvalds goto renew; 24011da177e4SLinus Torvalds } 24020f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 24030f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 24040f442aa2SJ. Bruce Fields renew: 24050f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 24061da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 24071da177e4SLinus Torvalds if (sop == NULL) 24080f442aa2SJ. Bruce Fields return nfserr_resource; 24091da177e4SLinus Torvalds open->op_stateowner = sop; 24100f442aa2SJ. Bruce Fields } 24110f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 24121da177e4SLinus Torvalds renew_client(sop->so_client); 24130f442aa2SJ. Bruce Fields return nfs_ok; 24141da177e4SLinus Torvalds } 24151da177e4SLinus Torvalds 2416b37ad28bSAl Viro static inline __be32 24174a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 24184a6e43e6SNeilBrown { 24194a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 24204a6e43e6SNeilBrown return nfserr_openmode; 24214a6e43e6SNeilBrown else 24224a6e43e6SNeilBrown return nfs_ok; 24234a6e43e6SNeilBrown } 24244a6e43e6SNeilBrown 242552f4fb43SNeilBrown static struct nfs4_delegation * 242652f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 242752f4fb43SNeilBrown { 242852f4fb43SNeilBrown struct nfs4_delegation *dp; 242952f4fb43SNeilBrown 2430ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 243152f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 243252f4fb43SNeilBrown return dp; 243352f4fb43SNeilBrown } 243452f4fb43SNeilBrown return NULL; 243552f4fb43SNeilBrown } 243652f4fb43SNeilBrown 243724a0111eSJ. Bruce Fields int share_access_to_flags(u32 share_access) 243824a0111eSJ. Bruce Fields { 243924a0111eSJ. Bruce Fields share_access &= ~NFS4_SHARE_WANT_MASK; 244024a0111eSJ. Bruce Fields 244124a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 244224a0111eSJ. Bruce Fields } 244324a0111eSJ. Bruce Fields 2444b37ad28bSAl Viro static __be32 2445567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2446567d9829SNeilBrown struct nfs4_delegation **dp) 2447567d9829SNeilBrown { 2448567d9829SNeilBrown int flags; 2449b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2450567d9829SNeilBrown 2451567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2452567d9829SNeilBrown if (*dp == NULL) 2453c44c5eebSNeilBrown goto out; 245424a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2455567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2456567d9829SNeilBrown if (status) 2457567d9829SNeilBrown *dp = NULL; 2458c44c5eebSNeilBrown out: 2459c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2460c44c5eebSNeilBrown return nfs_ok; 2461c44c5eebSNeilBrown if (status) 2462c44c5eebSNeilBrown return status; 2463c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 2464c44c5eebSNeilBrown return nfs_ok; 2465567d9829SNeilBrown } 2466567d9829SNeilBrown 2467b37ad28bSAl Viro static __be32 24681da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 24691da177e4SLinus Torvalds { 24701da177e4SLinus Torvalds struct nfs4_stateid *local; 2471b37ad28bSAl Viro __be32 status = nfserr_share_denied; 24721da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 24731da177e4SLinus Torvalds 24748beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 24751da177e4SLinus Torvalds /* ignore lock owners */ 24761da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 24771da177e4SLinus Torvalds continue; 24781da177e4SLinus Torvalds /* remember if we have seen this open owner */ 24791da177e4SLinus Torvalds if (local->st_stateowner == sop) 24801da177e4SLinus Torvalds *stpp = local; 24811da177e4SLinus Torvalds /* check for conflicting share reservations */ 24821da177e4SLinus Torvalds if (!test_share(local, open)) 24831da177e4SLinus Torvalds goto out; 24841da177e4SLinus Torvalds } 24851da177e4SLinus Torvalds status = 0; 24861da177e4SLinus Torvalds out: 24871da177e4SLinus Torvalds return status; 24881da177e4SLinus Torvalds } 24891da177e4SLinus Torvalds 24905ac049acSNeilBrown static inline struct nfs4_stateid * 24915ac049acSNeilBrown nfs4_alloc_stateid(void) 24925ac049acSNeilBrown { 24935ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 24945ac049acSNeilBrown } 24955ac049acSNeilBrown 249621fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 249721fb4016SJ. Bruce Fields { 249821fb4016SJ. Bruce Fields int flags = 0; 249921fb4016SJ. Bruce Fields 250021fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 250121fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 250221fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 250321fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 250421fb4016SJ. Bruce Fields return flags; 250521fb4016SJ. Bruce Fields } 250621fb4016SJ. Bruce Fields 2507f9d7562fSJ. Bruce Fields static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file 2508f9d7562fSJ. Bruce Fields *fp, struct svc_fh *cur_fh, u32 nfs4_access) 2509f9d7562fSJ. Bruce Fields { 2510f9d7562fSJ. Bruce Fields __be32 status; 2511f9d7562fSJ. Bruce Fields int oflag = nfs4_access_to_omode(nfs4_access); 2512f9d7562fSJ. Bruce Fields int access = nfs4_access_to_access(nfs4_access); 2513f9d7562fSJ. Bruce Fields 2514f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2515f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2516f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2517f9d7562fSJ. Bruce Fields if (status == nfserr_dropit) 2518f9d7562fSJ. Bruce Fields status = nfserr_jukebox; 2519f9d7562fSJ. Bruce Fields if (status) 2520f9d7562fSJ. Bruce Fields return status; 2521f9d7562fSJ. Bruce Fields } 2522f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2523f9d7562fSJ. Bruce Fields 2524f9d7562fSJ. Bruce Fields return nfs_ok; 2525f9d7562fSJ. Bruce Fields } 2526f9d7562fSJ. Bruce Fields 2527b37ad28bSAl Viro static __be32 25281da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2529f9d7562fSJ. Bruce Fields struct nfs4_file *fp, struct svc_fh *cur_fh, 2530f9d7562fSJ. Bruce Fields struct nfsd4_open *open) 25311da177e4SLinus Torvalds { 25321da177e4SLinus Torvalds struct nfs4_stateid *stp; 2533f9d7562fSJ. Bruce Fields __be32 status; 25341da177e4SLinus Torvalds 25355ac049acSNeilBrown stp = nfs4_alloc_stateid(); 25361da177e4SLinus Torvalds if (stp == NULL) 25371da177e4SLinus Torvalds return nfserr_resource; 25381da177e4SLinus Torvalds 2539f9d7562fSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access); 25401da177e4SLinus Torvalds if (status) { 25415ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 25421da177e4SLinus Torvalds return status; 25431da177e4SLinus Torvalds } 25441da177e4SLinus Torvalds *stpp = stp; 25451da177e4SLinus Torvalds return 0; 25461da177e4SLinus Torvalds } 25471da177e4SLinus Torvalds 2548b37ad28bSAl Viro static inline __be32 25491da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 25501da177e4SLinus Torvalds struct nfsd4_open *open) 25511da177e4SLinus Torvalds { 25521da177e4SLinus Torvalds struct iattr iattr = { 25531da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 25541da177e4SLinus Torvalds .ia_size = 0, 25551da177e4SLinus Torvalds }; 25561da177e4SLinus Torvalds if (!open->op_truncate) 25571da177e4SLinus Torvalds return 0; 25581da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 25599246585aSAl Viro return nfserr_inval; 25601da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 25611da177e4SLinus Torvalds } 25621da177e4SLinus Torvalds 2563b37ad28bSAl Viro static __be32 2564f9d7562fSJ. 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) 25651da177e4SLinus Torvalds { 25667d947842SJ. Bruce Fields u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; 25677d947842SJ. Bruce Fields bool new_access; 2568b37ad28bSAl Viro __be32 status; 25691da177e4SLinus Torvalds 25707d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2571f9d7562fSJ. Bruce Fields if (new_access) { 25727d947842SJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access); 2573f9d7562fSJ. Bruce Fields if (status) 2574f9d7562fSJ. Bruce Fields return status; 25756c26d08fSJ. Bruce Fields } 25761da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 25771da177e4SLinus Torvalds if (status) { 2578f9d7562fSJ. Bruce Fields if (new_access) { 2579f9d7562fSJ. Bruce Fields int oflag = nfs4_access_to_omode(new_access); 2580f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2581f9d7562fSJ. Bruce Fields } 25821da177e4SLinus Torvalds return status; 25831da177e4SLinus Torvalds } 25841da177e4SLinus Torvalds /* remember the open */ 258524a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2586b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 25871da177e4SLinus Torvalds 25881da177e4SLinus Torvalds return nfs_ok; 25891da177e4SLinus Torvalds } 25901da177e4SLinus Torvalds 25911da177e4SLinus Torvalds 25921da177e4SLinus Torvalds static void 259337515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 25941da177e4SLinus Torvalds { 25951da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 2596c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 25971da177e4SLinus Torvalds } 25981da177e4SLinus Torvalds 25991da177e4SLinus Torvalds /* 26001da177e4SLinus Torvalds * Attempt to hand out a delegation. 26011da177e4SLinus Torvalds */ 26021da177e4SLinus Torvalds static void 26031da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 26041da177e4SLinus Torvalds { 26051da177e4SLinus Torvalds struct nfs4_delegation *dp; 26061da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 26072bf23875SJ. Bruce Fields int cb_up = atomic_read(&sop->so_client->cl_cb_set); 2608c5b1f0d9SArnd Bergmann struct file_lock *fl; 26091da177e4SLinus Torvalds int status, flag = 0; 26101da177e4SLinus Torvalds 26111da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 26127b190fecSNeilBrown open->op_recall = 0; 26137b190fecSNeilBrown switch (open->op_claim_type) { 26147b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 26152bf23875SJ. Bruce Fields if (!cb_up) 26167b190fecSNeilBrown open->op_recall = 1; 26177b190fecSNeilBrown flag = open->op_delegate_type; 26187b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 26191da177e4SLinus Torvalds goto out; 26207b190fecSNeilBrown break; 26217b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 26227b190fecSNeilBrown /* Let's not give out any delegations till everyone's 26237b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2624af558e33SJ. Bruce Fields if (locks_in_grace()) 26257b190fecSNeilBrown goto out; 26262bf23875SJ. Bruce Fields if (!cb_up || !sop->so_confirmed) 26277b190fecSNeilBrown goto out; 26281da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 26291da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 26301da177e4SLinus Torvalds else 26311da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 26327b190fecSNeilBrown break; 26337b190fecSNeilBrown default: 26347b190fecSNeilBrown goto out; 26357b190fecSNeilBrown } 26361da177e4SLinus Torvalds 26371da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 26381da177e4SLinus Torvalds if (dp == NULL) { 26391da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 26401da177e4SLinus Torvalds goto out; 26411da177e4SLinus Torvalds } 2642c5b1f0d9SArnd Bergmann status = -ENOMEM; 2643c5b1f0d9SArnd Bergmann fl = locks_alloc_lock(); 2644c5b1f0d9SArnd Bergmann if (!fl) 2645c5b1f0d9SArnd Bergmann goto out; 2646c5b1f0d9SArnd Bergmann locks_init_lock(fl); 2647c5b1f0d9SArnd Bergmann fl->fl_lmops = &nfsd_lease_mng_ops; 2648c5b1f0d9SArnd Bergmann fl->fl_flags = FL_LEASE; 2649c5b1f0d9SArnd Bergmann fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 2650c5b1f0d9SArnd Bergmann fl->fl_end = OFFSET_MAX; 2651c5b1f0d9SArnd Bergmann fl->fl_owner = (fl_owner_t)dp; 2652c5b1f0d9SArnd Bergmann fl->fl_file = find_readable_file(stp->st_file); 2653c5b1f0d9SArnd Bergmann BUG_ON(!fl->fl_file); 2654c5b1f0d9SArnd Bergmann fl->fl_pid = current->tgid; 2655fcf744a9SJ. Bruce Fields dp->dl_flock = fl; 26561da177e4SLinus Torvalds 2657a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 26581da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 26591da177e4SLinus Torvalds */ 2660c5b1f0d9SArnd Bergmann if ((status = vfs_setlease(fl->fl_file, fl->fl_type, &fl))) { 26611da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 2662fcf744a9SJ. Bruce Fields dp->dl_flock = NULL; 266351ee4b84SChristoph Hellwig locks_free_lock(fl); 2664c907132dSNeilBrown unhash_delegation(dp); 26651da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 26661da177e4SLinus Torvalds goto out; 26671da177e4SLinus Torvalds } 26681da177e4SLinus Torvalds 26691da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 26701da177e4SLinus Torvalds 26718c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 26728c10cbdbSBenny Halevy STATEID_VAL(&dp->dl_stateid)); 26731da177e4SLinus Torvalds out: 26747b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 26757b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 26767b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 26772fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 26781da177e4SLinus Torvalds open->op_delegate_type = flag; 26791da177e4SLinus Torvalds } 26801da177e4SLinus Torvalds 26811da177e4SLinus Torvalds /* 26821da177e4SLinus Torvalds * called with nfs4_lock_state() held. 26831da177e4SLinus Torvalds */ 2684b37ad28bSAl Viro __be32 26851da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 26861da177e4SLinus Torvalds { 26876668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 26881da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 26891da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 26901da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2691567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2692b37ad28bSAl Viro __be32 status; 26931da177e4SLinus Torvalds 26941da177e4SLinus Torvalds status = nfserr_inval; 2695d87a8adeSAndy Adamson if (!access_valid(open->op_share_access, resp->cstate.minorversion) 2696ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 26971da177e4SLinus Torvalds goto out; 26981da177e4SLinus Torvalds /* 26991da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 27001da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 27011da177e4SLinus Torvalds * If not found, create the nfs4_file struct 27021da177e4SLinus Torvalds */ 27031da177e4SLinus Torvalds fp = find_file(ino); 27041da177e4SLinus Torvalds if (fp) { 27051da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 27061da177e4SLinus Torvalds goto out; 2707c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2708c44c5eebSNeilBrown if (status) 2709c44c5eebSNeilBrown goto out; 27101da177e4SLinus Torvalds } else { 2711c44c5eebSNeilBrown status = nfserr_bad_stateid; 2712c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2713c44c5eebSNeilBrown goto out; 27141da177e4SLinus Torvalds status = nfserr_resource; 27151da177e4SLinus Torvalds fp = alloc_init_file(ino); 27161da177e4SLinus Torvalds if (fp == NULL) 27171da177e4SLinus Torvalds goto out; 27181da177e4SLinus Torvalds } 27191da177e4SLinus Torvalds 27201da177e4SLinus Torvalds /* 27211da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 27221da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 27231da177e4SLinus Torvalds */ 27241da177e4SLinus Torvalds if (stp) { 27251da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 2726f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 27271da177e4SLinus Torvalds if (status) 27281da177e4SLinus Torvalds goto out; 2729444c2c07SNeilBrown update_stateid(&stp->st_stateid); 27301da177e4SLinus Torvalds } else { 2731f9d7562fSJ. Bruce Fields status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); 2732567d9829SNeilBrown if (status) 27331da177e4SLinus Torvalds goto out; 27341da177e4SLinus Torvalds init_stateid(stp, fp, open); 27351da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 27361da177e4SLinus Torvalds if (status) { 27372283963fSJ. Bruce Fields release_open_stateid(stp); 27381da177e4SLinus Torvalds goto out; 27391da177e4SLinus Torvalds } 27406668958fSAndy Adamson if (nfsd4_has_session(&resp->cstate)) 27416668958fSAndy Adamson update_stateid(&stp->st_stateid); 27421da177e4SLinus Torvalds } 27431da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 27441da177e4SLinus Torvalds 27454dc6ec00SJ. Bruce Fields if (nfsd4_has_session(&resp->cstate)) 27466668958fSAndy Adamson open->op_stateowner->so_confirmed = 1; 27476668958fSAndy Adamson 27481da177e4SLinus Torvalds /* 27491da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 27501da177e4SLinus Torvalds * OPEN succeeds even if we fail. 27511da177e4SLinus Torvalds */ 27521da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 27531da177e4SLinus Torvalds 27541da177e4SLinus Torvalds status = nfs_ok; 27551da177e4SLinus Torvalds 27568c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 27578c10cbdbSBenny Halevy STATEID_VAL(&stp->st_stateid)); 27581da177e4SLinus Torvalds out: 275913cd2184SNeilBrown if (fp) 276013cd2184SNeilBrown put_nfs4_file(fp); 276137515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 276237515177SNeilBrown nfs4_set_claim_prev(open); 27631da177e4SLinus Torvalds /* 27641da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 27651da177e4SLinus Torvalds */ 27661da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 27676668958fSAndy Adamson if (!open->op_stateowner->so_confirmed && 27686668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 27691da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 27701da177e4SLinus Torvalds 27711da177e4SLinus Torvalds return status; 27721da177e4SLinus Torvalds } 27731da177e4SLinus Torvalds 2774b37ad28bSAl Viro __be32 2775b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2776b591480bSJ.Bruce Fields clientid_t *clid) 27771da177e4SLinus Torvalds { 27781da177e4SLinus Torvalds struct nfs4_client *clp; 2779b37ad28bSAl Viro __be32 status; 27801da177e4SLinus Torvalds 27811da177e4SLinus Torvalds nfs4_lock_state(); 27821da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 27831da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 27841da177e4SLinus Torvalds status = nfserr_stale_clientid; 27851da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 27861da177e4SLinus Torvalds goto out; 27871da177e4SLinus Torvalds clp = find_confirmed_client(clid); 27881da177e4SLinus Torvalds status = nfserr_expired; 27891da177e4SLinus Torvalds if (clp == NULL) { 27901da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 27911da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 27921da177e4SLinus Torvalds goto out; 27931da177e4SLinus Torvalds } 27941da177e4SLinus Torvalds renew_client(clp); 27951da177e4SLinus Torvalds status = nfserr_cb_path_down; 2796ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 27972bf23875SJ. Bruce Fields && !atomic_read(&clp->cl_cb_set)) 27981da177e4SLinus Torvalds goto out; 27991da177e4SLinus Torvalds status = nfs_ok; 28001da177e4SLinus Torvalds out: 28011da177e4SLinus Torvalds nfs4_unlock_state(); 28021da177e4SLinus Torvalds return status; 28031da177e4SLinus Torvalds } 28041da177e4SLinus Torvalds 2805af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 2806af558e33SJ. Bruce Fields }; 2807af558e33SJ. Bruce Fields 2808a76b4319SNeilBrown static void 2809af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2810a76b4319SNeilBrown { 2811a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2812c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2813af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2814e46b498cSJ. Bruce Fields /* 2815e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 2816e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 2817e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 2818e46b498cSJ. Bruce Fields */ 2819e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 2820a76b4319SNeilBrown } 2821a76b4319SNeilBrown 2822fd39ca9aSNeilBrown static time_t 28231da177e4SLinus Torvalds nfs4_laundromat(void) 28241da177e4SLinus Torvalds { 28251da177e4SLinus Torvalds struct nfs4_client *clp; 28261da177e4SLinus Torvalds struct nfs4_stateowner *sop; 28271da177e4SLinus Torvalds struct nfs4_delegation *dp; 28281da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 2829cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 2830cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 2831cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 28321da177e4SLinus Torvalds 28331da177e4SLinus Torvalds nfs4_lock_state(); 28341da177e4SLinus Torvalds 28351da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 2836af558e33SJ. Bruce Fields if (locks_in_grace()) 2837af558e33SJ. Bruce Fields nfsd4_end_grace(); 283836acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 283936acb66bSBenny Halevy spin_lock(&client_lock); 28401da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 28411da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 28421da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 28431da177e4SLinus Torvalds t = clp->cl_time - cutoff; 28441da177e4SLinus Torvalds if (clientid_val > t) 28451da177e4SLinus Torvalds clientid_val = t; 28461da177e4SLinus Torvalds break; 28471da177e4SLinus Torvalds } 2848d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 2849d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 2850d7682988SBenny Halevy clp->cl_clientid.cl_id); 2851d7682988SBenny Halevy continue; 2852d7682988SBenny Halevy } 2853d7682988SBenny Halevy unhash_client_locked(clp); 2854d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 285536acb66bSBenny Halevy } 285636acb66bSBenny Halevy spin_unlock(&client_lock); 285736acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 285836acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 28591da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 28601da177e4SLinus Torvalds clp->cl_clientid.cl_id); 2861c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 28621da177e4SLinus Torvalds expire_client(clp); 28631da177e4SLinus Torvalds } 28641da177e4SLinus Torvalds spin_lock(&recall_lock); 28651da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 28661da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 28671da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 28681da177e4SLinus Torvalds u = dp->dl_time - cutoff; 28691da177e4SLinus Torvalds if (test_val > u) 28701da177e4SLinus Torvalds test_val = u; 28711da177e4SLinus Torvalds break; 28721da177e4SLinus Torvalds } 28731da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 28741da177e4SLinus Torvalds dp, dp->dl_flock); 28751da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 28761da177e4SLinus Torvalds } 28771da177e4SLinus Torvalds spin_unlock(&recall_lock); 28781da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 28791da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 28801da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 28811da177e4SLinus Torvalds unhash_delegation(dp); 28821da177e4SLinus Torvalds } 2883cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 28841da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 28851da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 28861da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 28871da177e4SLinus Torvalds u = sop->so_time - cutoff; 28881da177e4SLinus Torvalds if (test_val > u) 28891da177e4SLinus Torvalds test_val = u; 28901da177e4SLinus Torvalds break; 28911da177e4SLinus Torvalds } 28921da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 28931da177e4SLinus Torvalds sop->so_id); 2894f044ff83SJ. Bruce Fields release_openowner(sop); 28951da177e4SLinus Torvalds } 28961da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 28971da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 28981da177e4SLinus Torvalds nfs4_unlock_state(); 28991da177e4SLinus Torvalds return clientid_val; 29001da177e4SLinus Torvalds } 29011da177e4SLinus Torvalds 2902a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 2903a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 2904a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 2905a254b246SHarvey Harrison 2906a254b246SHarvey Harrison static void 2907c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 29081da177e4SLinus Torvalds { 29091da177e4SLinus Torvalds time_t t; 29101da177e4SLinus Torvalds 29111da177e4SLinus Torvalds t = nfs4_laundromat(); 29121da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 291358da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 29141da177e4SLinus Torvalds } 29151da177e4SLinus Torvalds 2916fd39ca9aSNeilBrown static struct nfs4_stateowner * 2917f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 2918f8816512SNeilBrown { 29191da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 29201da177e4SLinus Torvalds 29211da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 29221da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 29231da177e4SLinus Torvalds if (local->so_id == st_id) 29241da177e4SLinus Torvalds return local; 29251da177e4SLinus Torvalds } 29261da177e4SLinus Torvalds } 29271da177e4SLinus Torvalds return NULL; 29281da177e4SLinus Torvalds } 29291da177e4SLinus Torvalds 29301da177e4SLinus Torvalds static inline int 29311da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 29321da177e4SLinus Torvalds { 2933f9d7562fSJ. Bruce Fields return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; 29341da177e4SLinus Torvalds } 29351da177e4SLinus Torvalds 29361da177e4SLinus Torvalds static int 29371da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 29381da177e4SLinus Torvalds { 2939e4e83ea4SJ. Bruce Fields if (stateid->si_boot == boot_time) 2940e4e83ea4SJ. Bruce Fields return 0; 29418c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 29428c10cbdbSBenny Halevy STATEID_VAL(stateid)); 29431da177e4SLinus Torvalds return 1; 29441da177e4SLinus Torvalds } 29451da177e4SLinus Torvalds 29461da177e4SLinus Torvalds static inline int 29471da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 29481da177e4SLinus Torvalds { 29491da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 29501da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 29511da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 29521da177e4SLinus Torvalds } 29531da177e4SLinus Torvalds 29541da177e4SLinus Torvalds static inline int 29551da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 29561da177e4SLinus Torvalds { 29571da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 29581da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 29591da177e4SLinus Torvalds } 29601da177e4SLinus Torvalds 29611da177e4SLinus Torvalds static 2962b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 29631da177e4SLinus Torvalds { 2964b37ad28bSAl Viro __be32 status = nfserr_openmode; 29651da177e4SLinus Torvalds 296602921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 296702921914SJ. Bruce Fields if (stp->st_openstp) 296802921914SJ. Bruce Fields stp = stp->st_openstp; 29691da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 29701da177e4SLinus Torvalds goto out; 29711da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 29721da177e4SLinus Torvalds goto out; 29731da177e4SLinus Torvalds status = nfs_ok; 29741da177e4SLinus Torvalds out: 29751da177e4SLinus Torvalds return status; 29761da177e4SLinus Torvalds } 29771da177e4SLinus Torvalds 2978b37ad28bSAl Viro static inline __be32 29791da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 29801da177e4SLinus Torvalds { 2981203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 29821da177e4SLinus Torvalds return nfs_ok; 2983af558e33SJ. Bruce Fields else if (locks_in_grace()) { 29841da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 29851da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 29861da177e4SLinus Torvalds return nfserr_grace; 29871da177e4SLinus Torvalds } else if (flags & WR_STATE) 29881da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 29891da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 29901da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 29911da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 29921da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 29931da177e4SLinus Torvalds } 29941da177e4SLinus Torvalds 29951da177e4SLinus Torvalds /* 29961da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 29971da177e4SLinus Torvalds * that are not able to provide mandatory locking. 29981da177e4SLinus Torvalds */ 29991da177e4SLinus Torvalds static inline int 300018f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 30011da177e4SLinus Torvalds { 3002203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 30031da177e4SLinus Torvalds } 30041da177e4SLinus Torvalds 30056668958fSAndy Adamson static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) 30060836f587SJ. Bruce Fields { 30076668958fSAndy Adamson /* 30086668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 30096668958fSAndy Adamson * when it is zero. 30106668958fSAndy Adamson */ 30116668958fSAndy Adamson if ((flags & HAS_SESSION) && in->si_generation == 0) 30126668958fSAndy Adamson goto out; 30136668958fSAndy Adamson 30140836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 30150836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 30160836f587SJ. Bruce Fields return nfserr_bad_stateid; 30170836f587SJ. Bruce Fields /* 30180836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 30190836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 30200836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 30210836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 30220836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 30230836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 30240836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 30250836f587SJ. Bruce Fields * will just have to retry the IO: 30260836f587SJ. Bruce Fields */ 30270836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 30280836f587SJ. Bruce Fields return nfserr_old_stateid; 30296668958fSAndy Adamson out: 30300836f587SJ. Bruce Fields return nfs_ok; 30310836f587SJ. Bruce Fields } 30320836f587SJ. Bruce Fields 30333e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 30343e633079SJ. Bruce Fields { 30353e633079SJ. Bruce Fields return stateid->si_fileid == 0; 30363e633079SJ. Bruce Fields } 30373e633079SJ. Bruce Fields 30381da177e4SLinus Torvalds /* 30391da177e4SLinus Torvalds * Checks for stateid operations 30401da177e4SLinus Torvalds */ 3041b37ad28bSAl Viro __be32 3042dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3043dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 30441da177e4SLinus Torvalds { 30451da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 30461da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3047dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 30481da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3049b37ad28bSAl Viro __be32 status; 30501da177e4SLinus Torvalds 30511da177e4SLinus Torvalds if (filpp) 30521da177e4SLinus Torvalds *filpp = NULL; 30531da177e4SLinus Torvalds 305418f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 30551da177e4SLinus Torvalds return nfserr_grace; 30561da177e4SLinus Torvalds 30576668958fSAndy Adamson if (nfsd4_has_session(cstate)) 30586668958fSAndy Adamson flags |= HAS_SESSION; 30596668958fSAndy Adamson 30601da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 30611da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 30621da177e4SLinus Torvalds 30631da177e4SLinus Torvalds status = nfserr_stale_stateid; 30641da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 30651da177e4SLinus Torvalds goto out; 30661da177e4SLinus Torvalds 306733515142SJ. Bruce Fields /* 306833515142SJ. Bruce Fields * We assume that any stateid that has the current boot time, 306933515142SJ. Bruce Fields * but that we can't find, is expired: 307033515142SJ. Bruce Fields */ 307133515142SJ. Bruce Fields status = nfserr_expired; 30723e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 3073a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 3074e4e83ea4SJ. Bruce Fields if (!dp) 30751da177e4SLinus Torvalds goto out; 30766668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, 30776668958fSAndy Adamson flags); 30780c2a498fSJ. Bruce Fields if (status) 30790c2a498fSJ. Bruce Fields goto out; 3080dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3081dc9bf700SJ. Bruce Fields if (status) 3082dc9bf700SJ. Bruce Fields goto out; 3083dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 308443b0178eSDan Carpenter if (filpp) { 3085f9d7562fSJ. Bruce Fields *filpp = find_readable_file(dp->dl_file); 3086f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 308743b0178eSDan Carpenter } 30881da177e4SLinus Torvalds } else { /* open or lock stateid */ 3089a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 3090e4e83ea4SJ. Bruce Fields if (!stp) 30911da177e4SLinus Torvalds goto out; 309233515142SJ. Bruce Fields status = nfserr_bad_stateid; 30936150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 30941da177e4SLinus Torvalds goto out; 30951da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 30961da177e4SLinus Torvalds goto out; 30976668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, 30986668958fSAndy Adamson flags); 30990836f587SJ. Bruce Fields if (status) 31001da177e4SLinus Torvalds goto out; 3101a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3102a4455be0SJ. Bruce Fields if (status) 31031da177e4SLinus Torvalds goto out; 31041da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 3105f9d7562fSJ. Bruce Fields if (filpp) { 3106f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3107f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3108f9d7562fSJ. Bruce Fields else 3109f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3110f9d7562fSJ. Bruce Fields } 31111da177e4SLinus Torvalds } 31121da177e4SLinus Torvalds status = nfs_ok; 31131da177e4SLinus Torvalds out: 31141da177e4SLinus Torvalds return status; 31151da177e4SLinus Torvalds } 31161da177e4SLinus Torvalds 31174c4cd222SNeilBrown static inline int 31184c4cd222SNeilBrown setlkflg (int type) 31194c4cd222SNeilBrown { 31204c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 31214c4cd222SNeilBrown RD_STATE : WR_STATE; 31224c4cd222SNeilBrown } 31231da177e4SLinus Torvalds 31241da177e4SLinus Torvalds /* 31251da177e4SLinus Torvalds * Checks for sequence id mutating operations. 31261da177e4SLinus Torvalds */ 3127b37ad28bSAl Viro static __be32 3128dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 3129dd453dfdSBenny Halevy stateid_t *stateid, int flags, 3130dd453dfdSBenny Halevy struct nfs4_stateowner **sopp, 3131dd453dfdSBenny Halevy struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 31321da177e4SLinus Torvalds { 31331da177e4SLinus Torvalds struct nfs4_stateid *stp; 31341da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3135dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 31360836f587SJ. Bruce Fields __be32 status; 31371da177e4SLinus Torvalds 31388c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 31398c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 31401da177e4SLinus Torvalds 31411da177e4SLinus Torvalds *stpp = NULL; 31421da177e4SLinus Torvalds *sopp = NULL; 31431da177e4SLinus Torvalds 31441da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 31452fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 31463a4f98bbSNeilBrown return nfserr_bad_stateid; 31471da177e4SLinus Torvalds } 31481da177e4SLinus Torvalds 31491da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 31503a4f98bbSNeilBrown return nfserr_stale_stateid; 31516668958fSAndy Adamson 31526668958fSAndy Adamson if (nfsd4_has_session(cstate)) 31536668958fSAndy Adamson flags |= HAS_SESSION; 31546668958fSAndy Adamson 31551da177e4SLinus Torvalds /* 31561da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 31571da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 31581da177e4SLinus Torvalds * number is incorrect. 31591da177e4SLinus Torvalds */ 3160f8816512SNeilBrown stp = find_stateid(stateid, flags); 3161f8816512SNeilBrown if (stp == NULL) { 3162f8816512SNeilBrown /* 3163f8816512SNeilBrown * Also, we should make sure this isn't just the result of 3164f8816512SNeilBrown * a replayed close: 3165f8816512SNeilBrown */ 3166f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 316733515142SJ. Bruce Fields /* It's not stale; let's assume it's expired: */ 3168f8816512SNeilBrown if (sop == NULL) 316933515142SJ. Bruce Fields return nfserr_expired; 3170f8816512SNeilBrown *sopp = sop; 3171f8816512SNeilBrown goto check_replay; 3172f8816512SNeilBrown } 31731da177e4SLinus Torvalds 317439325bd0SJ. Bruce Fields *stpp = stp; 317539325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 317639325bd0SJ. Bruce Fields 31774c4cd222SNeilBrown if (lock) { 31784c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 31791da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 31804c4cd222SNeilBrown int lkflg = 0; 3181b37ad28bSAl Viro __be32 status; 31821da177e4SLinus Torvalds 31834c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 31844c4cd222SNeilBrown 31854c4cd222SNeilBrown if (lock->lk_is_new) { 31861da177e4SLinus Torvalds if (!sop->so_is_open_owner) 31873a4f98bbSNeilBrown return nfserr_bad_stateid; 318860adfc50SAndy Adamson if (!(flags & HAS_SESSION) && 318960adfc50SAndy Adamson !same_clid(&clp->cl_clientid, lockclid)) 31903a4f98bbSNeilBrown return nfserr_bad_stateid; 31914c4cd222SNeilBrown /* stp is the open stateid */ 31924c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 31934c4cd222SNeilBrown if (status) 31944c4cd222SNeilBrown return status; 31954c4cd222SNeilBrown } else { 31964c4cd222SNeilBrown /* stp is the lock stateid */ 31974c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 31984c4cd222SNeilBrown if (status) 31994c4cd222SNeilBrown return status; 32004c4cd222SNeilBrown } 32011da177e4SLinus Torvalds } 32021da177e4SLinus Torvalds 3203f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 32042fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 32053a4f98bbSNeilBrown return nfserr_bad_stateid; 32061da177e4SLinus Torvalds } 32071da177e4SLinus Torvalds 32081da177e4SLinus Torvalds /* 32091da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 32101da177e4SLinus Torvalds * For the moment, we ignore the possibility of 32111da177e4SLinus Torvalds * generation number wraparound. 32121da177e4SLinus Torvalds */ 32136668958fSAndy Adamson if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) 32141da177e4SLinus Torvalds goto check_replay; 32151da177e4SLinus Torvalds 32163a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 32172fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 32183a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 32193a4f98bbSNeilBrown return nfserr_bad_stateid; 32201da177e4SLinus Torvalds } 32213a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 32222fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 32233a4f98bbSNeilBrown " confirmed yet!\n"); 32243a4f98bbSNeilBrown return nfserr_bad_stateid; 32251da177e4SLinus Torvalds } 32266668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, flags); 32270836f587SJ. Bruce Fields if (status) 32280836f587SJ. Bruce Fields return status; 322952fd004eSNeilBrown renew_client(sop->so_client); 32303a4f98bbSNeilBrown return nfs_ok; 32311da177e4SLinus Torvalds 32321da177e4SLinus Torvalds check_replay: 3233bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 3234849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 32351da177e4SLinus Torvalds /* indicate replay to calling function */ 3236a90b061cSAl Viro return nfserr_replay_me; 32371da177e4SLinus Torvalds } 32382fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 32393a4f98bbSNeilBrown sop->so_seqid, seqid); 32403a4f98bbSNeilBrown *sopp = NULL; 32413a4f98bbSNeilBrown return nfserr_bad_seqid; 32421da177e4SLinus Torvalds } 32431da177e4SLinus Torvalds 3244b37ad28bSAl Viro __be32 3245ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3246a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 32471da177e4SLinus Torvalds { 3248b37ad28bSAl Viro __be32 status; 32491da177e4SLinus Torvalds struct nfs4_stateowner *sop; 32501da177e4SLinus Torvalds struct nfs4_stateid *stp; 32511da177e4SLinus Torvalds 32521da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3253ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3254ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 32551da177e4SLinus Torvalds 3256ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3257a8cddc5dSJ. Bruce Fields if (status) 3258a8cddc5dSJ. Bruce Fields return status; 32591da177e4SLinus Torvalds 32601da177e4SLinus Torvalds nfs4_lock_state(); 32611da177e4SLinus Torvalds 3262dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3263ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 3264f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 32651da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 32661da177e4SLinus Torvalds goto out; 32671da177e4SLinus Torvalds 32681da177e4SLinus Torvalds sop = oc->oc_stateowner; 32691da177e4SLinus Torvalds sop->so_confirmed = 1; 32701da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 32711da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 32728c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 32738c10cbdbSBenny Halevy __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); 3274c7b9a459SNeilBrown 3275c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 32761da177e4SLinus Torvalds out: 3277f2327d9aSNeil Brown if (oc->oc_stateowner) { 32781da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 3279a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 3280f2327d9aSNeil Brown } 32811da177e4SLinus Torvalds nfs4_unlock_state(); 32821da177e4SLinus Torvalds return status; 32831da177e4SLinus Torvalds } 32841da177e4SLinus Torvalds 32851da177e4SLinus Torvalds 32861da177e4SLinus Torvalds /* 32871da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 32881da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 32891da177e4SLinus Torvalds */ 32901da177e4SLinus Torvalds static void 32911da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 32921da177e4SLinus Torvalds { 32931da177e4SLinus Torvalds int i; 32941da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 32951da177e4SLinus Torvalds if ((i & access) != i) 32961da177e4SLinus Torvalds __clear_bit(i, bmap); 32971da177e4SLinus Torvalds } 32981da177e4SLinus Torvalds } 32991da177e4SLinus Torvalds 33001da177e4SLinus Torvalds static void 33011da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 33021da177e4SLinus Torvalds { 33031da177e4SLinus Torvalds int i; 33041da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 33051da177e4SLinus Torvalds if ((i & deny) != i) 33061da177e4SLinus Torvalds __clear_bit(i, bmap); 33071da177e4SLinus Torvalds } 33081da177e4SLinus Torvalds } 33091da177e4SLinus Torvalds 3310b37ad28bSAl Viro __be32 3311ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3312ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3313a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 33141da177e4SLinus Torvalds { 3315b37ad28bSAl Viro __be32 status; 33161da177e4SLinus Torvalds struct nfs4_stateid *stp; 33171da177e4SLinus Torvalds unsigned int share_access; 33181da177e4SLinus Torvalds 33191da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3320ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3321ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 33221da177e4SLinus Torvalds 3323d87a8adeSAndy Adamson if (!access_valid(od->od_share_access, cstate->minorversion) 3324ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 33251da177e4SLinus Torvalds return nfserr_inval; 33261da177e4SLinus Torvalds 33271da177e4SLinus Torvalds nfs4_lock_state(); 3328dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3329ca364317SJ.Bruce Fields od->od_seqid, 33301da177e4SLinus Torvalds &od->od_stateid, 3331f3362737SJ. Bruce Fields OPEN_STATE, 33321da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 33331da177e4SLinus Torvalds goto out; 33341da177e4SLinus Torvalds 33351da177e4SLinus Torvalds status = nfserr_inval; 33361da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 33371da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 33381da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 33391da177e4SLinus Torvalds goto out; 33401da177e4SLinus Torvalds } 33411da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 33421da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 33431da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 33441da177e4SLinus Torvalds goto out; 33451da177e4SLinus Torvalds } 33461da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 3347f9d7562fSJ. Bruce Fields nfs4_file_downgrade(stp->st_file, share_access & ~od->od_share_access); 33481da177e4SLinus Torvalds 33491da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 33501da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 33511da177e4SLinus Torvalds 33521da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 33531da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 33541da177e4SLinus Torvalds status = nfs_ok; 33551da177e4SLinus Torvalds out: 3356f2327d9aSNeil Brown if (od->od_stateowner) { 33571da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 3358a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 3359f2327d9aSNeil Brown } 33601da177e4SLinus Torvalds nfs4_unlock_state(); 33611da177e4SLinus Torvalds return status; 33621da177e4SLinus Torvalds } 33631da177e4SLinus Torvalds 33641da177e4SLinus Torvalds /* 33651da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 33661da177e4SLinus Torvalds */ 3367b37ad28bSAl Viro __be32 3368ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3369a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 33701da177e4SLinus Torvalds { 3371b37ad28bSAl Viro __be32 status; 33721da177e4SLinus Torvalds struct nfs4_stateid *stp; 33731da177e4SLinus Torvalds 33741da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3375ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3376ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 33771da177e4SLinus Torvalds 33781da177e4SLinus Torvalds nfs4_lock_state(); 33791da177e4SLinus Torvalds /* check close_lru for replay */ 3380dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3381ca364317SJ.Bruce Fields close->cl_seqid, 33821da177e4SLinus Torvalds &close->cl_stateid, 3383f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 33841da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 33851da177e4SLinus Torvalds goto out; 33861da177e4SLinus Torvalds status = nfs_ok; 33871da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 33881da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 33891da177e4SLinus Torvalds 339004ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 33912283963fSJ. Bruce Fields release_open_stateid(stp); 339204ef5954SJ. Bruce Fields 339304ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 339404ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 339504ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 339604ef5954SJ. Bruce Fields */ 339704ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 339804ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 33991da177e4SLinus Torvalds out: 3400f2327d9aSNeil Brown if (close->cl_stateowner) { 34011da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 3402a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 3403f2327d9aSNeil Brown } 34041da177e4SLinus Torvalds nfs4_unlock_state(); 34051da177e4SLinus Torvalds return status; 34061da177e4SLinus Torvalds } 34071da177e4SLinus Torvalds 3408b37ad28bSAl Viro __be32 3409ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3410ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 34111da177e4SLinus Torvalds { 3412203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3413203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 3414203a8c8eSJ. Bruce Fields struct inode *inode; 3415b37ad28bSAl Viro __be32 status; 34166668958fSAndy Adamson int flags = 0; 34171da177e4SLinus Torvalds 3418ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3419203a8c8eSJ. Bruce Fields return status; 3420203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 34211da177e4SLinus Torvalds 34226668958fSAndy Adamson if (nfsd4_has_session(cstate)) 34236668958fSAndy Adamson flags |= HAS_SESSION; 34241da177e4SLinus Torvalds nfs4_lock_state(); 3425203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 3426203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3427203a8c8eSJ. Bruce Fields goto out; 3428203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 3429203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 3430203a8c8eSJ. Bruce Fields goto out; 34317e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 3432203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 3433203a8c8eSJ. Bruce Fields goto out; 343433515142SJ. Bruce Fields status = nfserr_expired; 3435203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 3436e4e83ea4SJ. Bruce Fields if (!dp) 3437203a8c8eSJ. Bruce Fields goto out; 34386668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, flags); 3439203a8c8eSJ. Bruce Fields if (status) 3440203a8c8eSJ. Bruce Fields goto out; 3441203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 3442203a8c8eSJ. Bruce Fields 3443203a8c8eSJ. Bruce Fields unhash_delegation(dp); 34441da177e4SLinus Torvalds out: 3445203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3446203a8c8eSJ. Bruce Fields 34471da177e4SLinus Torvalds return status; 34481da177e4SLinus Torvalds } 34491da177e4SLinus Torvalds 34501da177e4SLinus Torvalds 34511da177e4SLinus Torvalds /* 34521da177e4SLinus Torvalds * Lock owner state (byte-range locks) 34531da177e4SLinus Torvalds */ 34541da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 34551da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 34561da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 34571da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 34581da177e4SLinus Torvalds 345987df4de8SBenny Halevy static inline u64 346087df4de8SBenny Halevy end_offset(u64 start, u64 len) 346187df4de8SBenny Halevy { 346287df4de8SBenny Halevy u64 end; 346387df4de8SBenny Halevy 346487df4de8SBenny Halevy end = start + len; 346587df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 346687df4de8SBenny Halevy } 346787df4de8SBenny Halevy 346887df4de8SBenny Halevy /* last octet in a range */ 346987df4de8SBenny Halevy static inline u64 347087df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 347187df4de8SBenny Halevy { 347287df4de8SBenny Halevy u64 end; 347387df4de8SBenny Halevy 347487df4de8SBenny Halevy BUG_ON(!len); 347587df4de8SBenny Halevy end = start + len; 347687df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 347787df4de8SBenny Halevy } 347887df4de8SBenny Halevy 34791da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 34801da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 34811da177e4SLinus Torvalds 34821da177e4SLinus Torvalds static inline unsigned int 34831da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 34841da177e4SLinus Torvalds struct xdr_netobj *ownername) 34851da177e4SLinus Torvalds { 34861da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 34871da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 34881da177e4SLinus Torvalds & LOCK_HASH_MASK; 34891da177e4SLinus Torvalds } 34901da177e4SLinus Torvalds 34911da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 34921da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 34931da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 34941da177e4SLinus Torvalds 3495fd39ca9aSNeilBrown static struct nfs4_stateid * 34961da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 34971da177e4SLinus Torvalds { 34989346eff0SKrishna Kumar struct nfs4_stateid *local; 34991da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 35001da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 35011da177e4SLinus Torvalds unsigned int hashval; 35021da177e4SLinus Torvalds 35031da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 35049346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 35051da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 35061da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 35071da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 35081da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 35091da177e4SLinus Torvalds return local; 35101da177e4SLinus Torvalds } 35111da177e4SLinus Torvalds } 35129346eff0SKrishna Kumar 35139346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 35141da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 35151da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 35161da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 35171da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 35181da177e4SLinus Torvalds return local; 35191da177e4SLinus Torvalds } 3520849823c5SNeil Brown } 35211da177e4SLinus Torvalds return NULL; 35221da177e4SLinus Torvalds } 35231da177e4SLinus Torvalds 35241da177e4SLinus Torvalds static struct nfs4_delegation * 35251da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 35261da177e4SLinus Torvalds { 352713cd2184SNeilBrown struct nfs4_file *fp; 352813cd2184SNeilBrown struct nfs4_delegation *dl; 35291da177e4SLinus Torvalds 35308c10cbdbSBenny Halevy dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, 35318c10cbdbSBenny Halevy STATEID_VAL(stid)); 35321da177e4SLinus Torvalds 35331da177e4SLinus Torvalds fp = find_file(ino); 353413cd2184SNeilBrown if (!fp) 35351da177e4SLinus Torvalds return NULL; 353613cd2184SNeilBrown dl = find_delegation_file(fp, stid); 353713cd2184SNeilBrown put_nfs4_file(fp); 353813cd2184SNeilBrown return dl; 35391da177e4SLinus Torvalds } 35401da177e4SLinus Torvalds 35411da177e4SLinus Torvalds /* 35421da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 35431da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 35441da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 35451da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 35461da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 35471da177e4SLinus Torvalds * the VFS, but this is a very deep change! 35481da177e4SLinus Torvalds */ 35491da177e4SLinus Torvalds static inline void 35501da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 35511da177e4SLinus Torvalds { 35521da177e4SLinus Torvalds if (lock->fl_start < 0) 35531da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 35541da177e4SLinus Torvalds if (lock->fl_end < 0) 35551da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 35561da177e4SLinus Torvalds } 35571da177e4SLinus Torvalds 3558d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3559d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 35607b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3561d5b9026aSNeilBrown }; 35621da177e4SLinus Torvalds 35631da177e4SLinus Torvalds static inline void 35641da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 35651da177e4SLinus Torvalds { 3566d5b9026aSNeilBrown struct nfs4_stateowner *sop; 35671da177e4SLinus Torvalds 3568d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3569d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 35701da177e4SLinus Torvalds kref_get(&sop->so_ref); 35711da177e4SLinus Torvalds deny->ld_sop = sop; 35721da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 3573d5b9026aSNeilBrown } else { 3574d5b9026aSNeilBrown deny->ld_sop = NULL; 3575d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3576d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 35771da177e4SLinus Torvalds } 35781da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 357987df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 358087df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 35811da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 35821da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 35831da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 35841da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 35851da177e4SLinus Torvalds } 35861da177e4SLinus Torvalds 35871da177e4SLinus Torvalds static struct nfs4_stateowner * 35881da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 35891da177e4SLinus Torvalds struct xdr_netobj *owner) 35901da177e4SLinus Torvalds { 35911da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 35921da177e4SLinus Torvalds struct nfs4_stateowner *op; 35931da177e4SLinus Torvalds 35941da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3595599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 35961da177e4SLinus Torvalds return op; 35971da177e4SLinus Torvalds } 35981da177e4SLinus Torvalds return NULL; 35991da177e4SLinus Torvalds } 36001da177e4SLinus Torvalds 36011da177e4SLinus Torvalds /* 36021da177e4SLinus Torvalds * Alloc a lock owner structure. 36031da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 36041da177e4SLinus Torvalds * occured. 36051da177e4SLinus Torvalds * 36061da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 36071da177e4SLinus Torvalds */ 36081da177e4SLinus Torvalds 36091da177e4SLinus Torvalds static struct nfs4_stateowner * 36101da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 36111da177e4SLinus Torvalds struct nfs4_stateowner *sop; 36121da177e4SLinus Torvalds struct nfs4_replay *rp; 36131da177e4SLinus Torvalds unsigned int idhashval; 36141da177e4SLinus Torvalds 36151da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 36161da177e4SLinus Torvalds return NULL; 36171da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 36181da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 36191da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 36201da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 3621ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 3622ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 36231da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 36241da177e4SLinus Torvalds sop->so_time = 0; 36251da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 36261da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3627ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 36281da177e4SLinus Torvalds sop->so_is_open_owner = 0; 36291da177e4SLinus Torvalds sop->so_id = current_ownerid++; 36301da177e4SLinus Torvalds sop->so_client = clp; 3631b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3632b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3633b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 36341da177e4SLinus Torvalds sop->so_confirmed = 1; 36351da177e4SLinus Torvalds rp = &sop->so_replay; 3636de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 36371da177e4SLinus Torvalds rp->rp_buflen = 0; 36381da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 36391da177e4SLinus Torvalds return sop; 36401da177e4SLinus Torvalds } 36411da177e4SLinus Torvalds 3642fd39ca9aSNeilBrown static struct nfs4_stateid * 36431da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 36441da177e4SLinus Torvalds { 36451da177e4SLinus Torvalds struct nfs4_stateid *stp; 36461da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 36471da177e4SLinus Torvalds 36485ac049acSNeilBrown stp = nfs4_alloc_stateid(); 36495ac049acSNeilBrown if (stp == NULL) 36501da177e4SLinus Torvalds goto out; 36511da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 36521da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3653ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3654ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 36551da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 36568beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3657ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 36581da177e4SLinus Torvalds stp->st_stateowner = sop; 365913cd2184SNeilBrown get_nfs4_file(fp); 36601da177e4SLinus Torvalds stp->st_file = fp; 3661e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 36621da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 36631da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 36641da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 36651da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 36664c4cd222SNeilBrown stp->st_openstp = open_stp; 36671da177e4SLinus Torvalds 36681da177e4SLinus Torvalds out: 36691da177e4SLinus Torvalds return stp; 36701da177e4SLinus Torvalds } 36711da177e4SLinus Torvalds 3672fd39ca9aSNeilBrown static int 36731da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 36741da177e4SLinus Torvalds { 367587df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 36761da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 36771da177e4SLinus Torvalds } 36781da177e4SLinus Torvalds 36791da177e4SLinus Torvalds /* 36801da177e4SLinus Torvalds * LOCK operation 36811da177e4SLinus Torvalds */ 3682b37ad28bSAl Viro __be32 3683ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3684a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 36851da177e4SLinus Torvalds { 36863e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 3687b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 36881da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 36897d947842SJ. Bruce Fields struct nfs4_file *fp; 36907d947842SJ. Bruce Fields struct file *filp = NULL; 36911da177e4SLinus Torvalds struct file_lock file_lock; 36928dc7c311SAndy Adamson struct file_lock conflock; 3693b37ad28bSAl Viro __be32 status = 0; 36941da177e4SLinus Torvalds unsigned int strhashval; 3695150b3934SMarc Eshel unsigned int cmd; 3696b8dd7b9aSAl Viro int err; 36971da177e4SLinus Torvalds 36981da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 36991da177e4SLinus Torvalds (long long) lock->lk_offset, 37001da177e4SLinus Torvalds (long long) lock->lk_length); 37011da177e4SLinus Torvalds 37021da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 37031da177e4SLinus Torvalds return nfserr_inval; 37041da177e4SLinus Torvalds 3705ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 37068837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3707a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3708a6f6ef2fSAndy Adamson return status; 3709a6f6ef2fSAndy Adamson } 3710a6f6ef2fSAndy Adamson 37111da177e4SLinus Torvalds nfs4_lock_state(); 37121da177e4SLinus Torvalds 37131da177e4SLinus Torvalds if (lock->lk_is_new) { 37141da177e4SLinus Torvalds /* 37151da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3716893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3717893f8770SNeilBrown * lock stateid. 37181da177e4SLinus Torvalds */ 37191da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 37201da177e4SLinus Torvalds 37211da177e4SLinus Torvalds status = nfserr_stale_clientid; 372260adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && 372360adfc50SAndy Adamson STALE_CLIENTID(&lock->lk_new_clientid)) 37241da177e4SLinus Torvalds goto out; 37251da177e4SLinus Torvalds 37261da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3727dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 37281da177e4SLinus Torvalds lock->lk_new_open_seqid, 37291da177e4SLinus Torvalds &lock->lk_new_open_stateid, 3730f3362737SJ. Bruce Fields OPEN_STATE, 37313a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 3732b59e3c0eSNeil Brown lock); 373337515177SNeilBrown if (status) 37341da177e4SLinus Torvalds goto out; 37353a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 37361da177e4SLinus Torvalds /* create lockowner and lock stateid */ 37371da177e4SLinus Torvalds fp = open_stp->st_file; 37381da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 37391da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 37401da177e4SLinus Torvalds &lock->v.new.owner); 37413e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 37423e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 37433e9e3dbeSNeilBrown * create new stateids)? */ 37441da177e4SLinus Torvalds status = nfserr_resource; 3745b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 3746b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 3747b59e3c0eSNeil Brown if (lock_sop == NULL) 37481da177e4SLinus Torvalds goto out; 3749b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 37508a280510SJ. Bruce Fields if (lock_stp == NULL) 37511da177e4SLinus Torvalds goto out; 37521da177e4SLinus Torvalds } else { 37531da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 3754dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 37551da177e4SLinus Torvalds lock->lk_old_lock_seqid, 37561da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 3757f3362737SJ. Bruce Fields LOCK_STATE, 37583a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 37591da177e4SLinus Torvalds if (status) 37601da177e4SLinus Torvalds goto out; 37613a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 37627d947842SJ. Bruce Fields fp = lock_stp->st_file; 37631da177e4SLinus Torvalds } 37643a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 37651da177e4SLinus Torvalds 37660dd395dcSNeilBrown status = nfserr_grace; 3767af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 37680dd395dcSNeilBrown goto out; 37690dd395dcSNeilBrown status = nfserr_no_grace; 3770af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 37710dd395dcSNeilBrown goto out; 37720dd395dcSNeilBrown 37731da177e4SLinus Torvalds locks_init_lock(&file_lock); 37741da177e4SLinus Torvalds switch (lock->lk_type) { 37751da177e4SLinus Torvalds case NFS4_READ_LT: 37761da177e4SLinus Torvalds case NFS4_READW_LT: 37777d947842SJ. Bruce Fields if (find_readable_file(lock_stp->st_file)) { 37787d947842SJ. Bruce Fields nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_READ); 3779f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 37807d947842SJ. Bruce Fields } 37811da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 3782150b3934SMarc Eshel cmd = F_SETLK; 37831da177e4SLinus Torvalds break; 37841da177e4SLinus Torvalds case NFS4_WRITE_LT: 37851da177e4SLinus Torvalds case NFS4_WRITEW_LT: 37867d947842SJ. Bruce Fields if (find_writeable_file(lock_stp->st_file)) { 37877d947842SJ. Bruce Fields nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_WRITE); 3788f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 37897d947842SJ. Bruce Fields } 37901da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 3791150b3934SMarc Eshel cmd = F_SETLK; 37921da177e4SLinus Torvalds break; 37931da177e4SLinus Torvalds default: 37941da177e4SLinus Torvalds status = nfserr_inval; 37951da177e4SLinus Torvalds goto out; 37961da177e4SLinus Torvalds } 3797f9d7562fSJ. Bruce Fields if (!filp) { 3798f9d7562fSJ. Bruce Fields status = nfserr_openmode; 3799f9d7562fSJ. Bruce Fields goto out; 3800f9d7562fSJ. Bruce Fields } 3801b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 38021da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 38031da177e4SLinus Torvalds file_lock.fl_file = filp; 38041da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3805d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 38061da177e4SLinus Torvalds 38071da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 380887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 38091da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 38101da177e4SLinus Torvalds 38111da177e4SLinus Torvalds /* 38121da177e4SLinus Torvalds * Try to lock the file in the VFS. 38131da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 38141da177e4SLinus Torvalds */ 38151da177e4SLinus Torvalds 3816fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 3817b8dd7b9aSAl Viro switch (-err) { 38181da177e4SLinus Torvalds case 0: /* success! */ 38191da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 38201da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 38211da177e4SLinus Torvalds sizeof(stateid_t)); 3822b8dd7b9aSAl Viro status = 0; 3823eb76b3fdSAndy Adamson break; 3824eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 3825eb76b3fdSAndy Adamson status = nfserr_denied; 3826eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 3827eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 3828eb76b3fdSAndy Adamson break; 38291da177e4SLinus Torvalds case (EDEADLK): 38301da177e4SLinus Torvalds status = nfserr_deadlock; 3831eb76b3fdSAndy Adamson break; 38321da177e4SLinus Torvalds default: 3833fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 3834eb76b3fdSAndy Adamson status = nfserr_resource; 3835eb76b3fdSAndy Adamson break; 38361da177e4SLinus Torvalds } 38371da177e4SLinus Torvalds out: 38388a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 3839f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 38403a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 38413a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 3842a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 3843f2327d9aSNeil Brown } 38441da177e4SLinus Torvalds nfs4_unlock_state(); 38451da177e4SLinus Torvalds return status; 38461da177e4SLinus Torvalds } 38471da177e4SLinus Torvalds 38481da177e4SLinus Torvalds /* 384955ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 385055ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 385155ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 385255ef1274SJ. Bruce Fields * inode operation.) 385355ef1274SJ. Bruce Fields */ 385455ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 385555ef1274SJ. Bruce Fields { 385655ef1274SJ. Bruce Fields struct file *file; 385755ef1274SJ. Bruce Fields int err; 385855ef1274SJ. Bruce Fields 385955ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 386055ef1274SJ. Bruce Fields if (err) 386155ef1274SJ. Bruce Fields return err; 386255ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 386355ef1274SJ. Bruce Fields nfsd_close(file); 386455ef1274SJ. Bruce Fields return err; 386555ef1274SJ. Bruce Fields } 386655ef1274SJ. Bruce Fields 386755ef1274SJ. Bruce Fields /* 38681da177e4SLinus Torvalds * LOCKT operation 38691da177e4SLinus Torvalds */ 3870b37ad28bSAl Viro __be32 3871ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3872ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 38731da177e4SLinus Torvalds { 38741da177e4SLinus Torvalds struct inode *inode; 38751da177e4SLinus Torvalds struct file_lock file_lock; 3876fd85b817SMarc Eshel int error; 3877b37ad28bSAl Viro __be32 status; 38781da177e4SLinus Torvalds 3879af558e33SJ. Bruce Fields if (locks_in_grace()) 38801da177e4SLinus Torvalds return nfserr_grace; 38811da177e4SLinus Torvalds 38821da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 38831da177e4SLinus Torvalds return nfserr_inval; 38841da177e4SLinus Torvalds 38851da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 38861da177e4SLinus Torvalds nfs4_lock_state(); 38871da177e4SLinus Torvalds 38881da177e4SLinus Torvalds status = nfserr_stale_clientid; 388960adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 38901da177e4SLinus Torvalds goto out; 38911da177e4SLinus Torvalds 3892ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 3893849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 38941da177e4SLinus Torvalds if (status == nfserr_symlink) 38951da177e4SLinus Torvalds status = nfserr_inval; 38961da177e4SLinus Torvalds goto out; 38971da177e4SLinus Torvalds } 38981da177e4SLinus Torvalds 3899ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 39001da177e4SLinus Torvalds locks_init_lock(&file_lock); 39011da177e4SLinus Torvalds switch (lockt->lt_type) { 39021da177e4SLinus Torvalds case NFS4_READ_LT: 39031da177e4SLinus Torvalds case NFS4_READW_LT: 39041da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 39051da177e4SLinus Torvalds break; 39061da177e4SLinus Torvalds case NFS4_WRITE_LT: 39071da177e4SLinus Torvalds case NFS4_WRITEW_LT: 39081da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 39091da177e4SLinus Torvalds break; 39101da177e4SLinus Torvalds default: 39112fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 39121da177e4SLinus Torvalds status = nfserr_inval; 39131da177e4SLinus Torvalds goto out; 39141da177e4SLinus Torvalds } 39151da177e4SLinus Torvalds 39161da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 39171da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 39181da177e4SLinus Torvalds if (lockt->lt_stateowner) 39191da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 39201da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 39211da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 39221da177e4SLinus Torvalds 39231da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 392487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 39251da177e4SLinus Torvalds 39261da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 39271da177e4SLinus Torvalds 39281da177e4SLinus Torvalds status = nfs_ok; 392955ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 3930fd85b817SMarc Eshel if (error) { 3931fd85b817SMarc Eshel status = nfserrno(error); 3932fd85b817SMarc Eshel goto out; 3933fd85b817SMarc Eshel } 39349d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 39351da177e4SLinus Torvalds status = nfserr_denied; 39369d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 39371da177e4SLinus Torvalds } 39381da177e4SLinus Torvalds out: 39391da177e4SLinus Torvalds nfs4_unlock_state(); 39401da177e4SLinus Torvalds return status; 39411da177e4SLinus Torvalds } 39421da177e4SLinus Torvalds 3943b37ad28bSAl Viro __be32 3944ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3945a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 39461da177e4SLinus Torvalds { 39471da177e4SLinus Torvalds struct nfs4_stateid *stp; 39481da177e4SLinus Torvalds struct file *filp = NULL; 39491da177e4SLinus Torvalds struct file_lock file_lock; 3950b37ad28bSAl Viro __be32 status; 3951b8dd7b9aSAl Viro int err; 39521da177e4SLinus Torvalds 39531da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 39541da177e4SLinus Torvalds (long long) locku->lu_offset, 39551da177e4SLinus Torvalds (long long) locku->lu_length); 39561da177e4SLinus Torvalds 39571da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 39581da177e4SLinus Torvalds return nfserr_inval; 39591da177e4SLinus Torvalds 39601da177e4SLinus Torvalds nfs4_lock_state(); 39611da177e4SLinus Torvalds 3962dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 39631da177e4SLinus Torvalds locku->lu_seqid, 39641da177e4SLinus Torvalds &locku->lu_stateid, 3965f3362737SJ. Bruce Fields LOCK_STATE, 39661da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 39671da177e4SLinus Torvalds goto out; 39681da177e4SLinus Torvalds 3969f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 3970f9d7562fSJ. Bruce Fields if (!filp) { 3971f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 3972f9d7562fSJ. Bruce Fields goto out; 3973f9d7562fSJ. Bruce Fields } 39741da177e4SLinus Torvalds BUG_ON(!filp); 39751da177e4SLinus Torvalds locks_init_lock(&file_lock); 39761da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 39771da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 39781da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 39791da177e4SLinus Torvalds file_lock.fl_file = filp; 39801da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3981d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 39821da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 39831da177e4SLinus Torvalds 398487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 39851da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 39861da177e4SLinus Torvalds 39871da177e4SLinus Torvalds /* 39881da177e4SLinus Torvalds * Try to unlock the file in the VFS. 39891da177e4SLinus Torvalds */ 3990fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 3991b8dd7b9aSAl Viro if (err) { 3992fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 39931da177e4SLinus Torvalds goto out_nfserr; 39941da177e4SLinus Torvalds } 39951da177e4SLinus Torvalds /* 39961da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 39971da177e4SLinus Torvalds */ 39981da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 39991da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 40001da177e4SLinus Torvalds 40011da177e4SLinus Torvalds out: 4002f2327d9aSNeil Brown if (locku->lu_stateowner) { 40031da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 4004a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 4005f2327d9aSNeil Brown } 40061da177e4SLinus Torvalds nfs4_unlock_state(); 40071da177e4SLinus Torvalds return status; 40081da177e4SLinus Torvalds 40091da177e4SLinus Torvalds out_nfserr: 4010b8dd7b9aSAl Viro status = nfserrno(err); 40111da177e4SLinus Torvalds goto out; 40121da177e4SLinus Torvalds } 40131da177e4SLinus Torvalds 40141da177e4SLinus Torvalds /* 40151da177e4SLinus Torvalds * returns 40161da177e4SLinus Torvalds * 1: locks held by lockowner 40171da177e4SLinus Torvalds * 0: no locks held by lockowner 40181da177e4SLinus Torvalds */ 40191da177e4SLinus Torvalds static int 4020f9d7562fSJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) 40211da177e4SLinus Torvalds { 40221da177e4SLinus Torvalds struct file_lock **flpp; 4023f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 40241da177e4SLinus Torvalds int status = 0; 40251da177e4SLinus Torvalds 4026b89f4321SArnd Bergmann lock_flocks(); 40271da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4028796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 40291da177e4SLinus Torvalds status = 1; 40301da177e4SLinus Torvalds goto out; 40311da177e4SLinus Torvalds } 4032796dadfdSJ. Bruce Fields } 40331da177e4SLinus Torvalds out: 4034b89f4321SArnd Bergmann unlock_flocks(); 40351da177e4SLinus Torvalds return status; 40361da177e4SLinus Torvalds } 40371da177e4SLinus Torvalds 4038b37ad28bSAl Viro __be32 4039b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4040b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4041b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 40421da177e4SLinus Torvalds { 40431da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 40443e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 40453e9e3dbeSNeilBrown struct nfs4_stateid *stp; 40461da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 40473e9e3dbeSNeilBrown struct list_head matches; 40483e9e3dbeSNeilBrown int i; 4049b37ad28bSAl Viro __be32 status; 40501da177e4SLinus Torvalds 40511da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 40521da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 40531da177e4SLinus Torvalds 40541da177e4SLinus Torvalds /* XXX check for lease expiration */ 40551da177e4SLinus Torvalds 40561da177e4SLinus Torvalds status = nfserr_stale_clientid; 4057849823c5SNeil Brown if (STALE_CLIENTID(clid)) 40581da177e4SLinus Torvalds return status; 40591da177e4SLinus Torvalds 40601da177e4SLinus Torvalds nfs4_lock_state(); 40611da177e4SLinus Torvalds 40621da177e4SLinus Torvalds status = nfserr_locks_held; 40633e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 40643e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 40653e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 40663e9e3dbeSNeilBrown * data structures. */ 40673e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 40683e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 40693e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 4070599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 40713e9e3dbeSNeilBrown continue; 40723e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4073ea1da636SNeilBrown st_perstateowner) { 4074f9d7562fSJ. Bruce Fields if (check_for_locks(stp->st_file, sop)) 40751da177e4SLinus Torvalds goto out; 40763e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 40773e9e3dbeSNeilBrown * so it's OK to fool with here. */ 40783e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 40791da177e4SLinus Torvalds } 40803e9e3dbeSNeilBrown } 40813e9e3dbeSNeilBrown } 40823e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 40833e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 40843e9e3dbeSNeilBrown * have been checked. */ 40851da177e4SLinus Torvalds status = nfs_ok; 40860fa822e4SNeilBrown while (!list_empty(&matches)) { 40870fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 40880fa822e4SNeilBrown so_perclient); 40890fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 40900fa822e4SNeilBrown * for openowners. */ 40910fa822e4SNeilBrown list_del(&sop->so_perclient); 4092f044ff83SJ. Bruce Fields release_lockowner(sop); 40931da177e4SLinus Torvalds } 40941da177e4SLinus Torvalds out: 40951da177e4SLinus Torvalds nfs4_unlock_state(); 40961da177e4SLinus Torvalds return status; 40971da177e4SLinus Torvalds } 40981da177e4SLinus Torvalds 40991da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4100a55370a3SNeilBrown alloc_reclaim(void) 41011da177e4SLinus Torvalds { 4102a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 41031da177e4SLinus Torvalds } 41041da177e4SLinus Torvalds 4105c7b9a459SNeilBrown int 4106a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4107c7b9a459SNeilBrown { 4108c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4109c7b9a459SNeilBrown struct nfs4_client *clp; 4110c7b9a459SNeilBrown 4111a1bcecd2SAndy Adamson clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); 4112c7b9a459SNeilBrown return clp ? 1 : 0; 4113c7b9a459SNeilBrown } 4114c7b9a459SNeilBrown 41151da177e4SLinus Torvalds /* 41161da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 41171da177e4SLinus Torvalds */ 4118190e4fbfSNeilBrown int 4119190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 41201da177e4SLinus Torvalds { 41211da177e4SLinus Torvalds unsigned int strhashval; 41221da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 41231da177e4SLinus Torvalds 4124a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4125a55370a3SNeilBrown crp = alloc_reclaim(); 41261da177e4SLinus Torvalds if (!crp) 41271da177e4SLinus Torvalds return 0; 4128a55370a3SNeilBrown strhashval = clientstr_hashval(name); 41291da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 41301da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4131a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 41321da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 41331da177e4SLinus Torvalds return 1; 41341da177e4SLinus Torvalds } 41351da177e4SLinus Torvalds 41361da177e4SLinus Torvalds static void 41371da177e4SLinus Torvalds nfs4_release_reclaim(void) 41381da177e4SLinus Torvalds { 41391da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 41401da177e4SLinus Torvalds int i; 41411da177e4SLinus Torvalds 41421da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 41431da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 41441da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 41451da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 41461da177e4SLinus Torvalds list_del(&crp->cr_strhash); 41471da177e4SLinus Torvalds kfree(crp); 41481da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 41491da177e4SLinus Torvalds } 41501da177e4SLinus Torvalds } 41511da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 41521da177e4SLinus Torvalds } 41531da177e4SLinus Torvalds 41541da177e4SLinus Torvalds /* 41551da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 4156fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 41571da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 41581da177e4SLinus Torvalds { 41591da177e4SLinus Torvalds unsigned int strhashval; 41601da177e4SLinus Torvalds struct nfs4_client *clp; 41611da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 41621da177e4SLinus Torvalds 41631da177e4SLinus Torvalds 41641da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 41651da177e4SLinus Torvalds clp = find_confirmed_client(clid); 41661da177e4SLinus Torvalds if (clp == NULL) 41671da177e4SLinus Torvalds return NULL; 41681da177e4SLinus Torvalds 4169a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4170a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4171a55370a3SNeilBrown clp->cl_recdir); 41721da177e4SLinus Torvalds 41731da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4174a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 41751da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4176a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 41771da177e4SLinus Torvalds return crp; 41781da177e4SLinus Torvalds } 41791da177e4SLinus Torvalds } 41801da177e4SLinus Torvalds return NULL; 41811da177e4SLinus Torvalds } 41821da177e4SLinus Torvalds 41831da177e4SLinus Torvalds /* 41841da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 41851da177e4SLinus Torvalds */ 4186b37ad28bSAl Viro __be32 41871da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 41881da177e4SLinus Torvalds { 4189dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 41901da177e4SLinus Torvalds } 41911da177e4SLinus Torvalds 4192ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 41931da177e4SLinus Torvalds 4194e8ff2a84SJ. Bruce Fields int 4195ac4d8ff2SNeilBrown nfs4_state_init(void) 41961da177e4SLinus Torvalds { 4197e8ff2a84SJ. Bruce Fields int i, status; 41981da177e4SLinus Torvalds 4199e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 4200e8ff2a84SJ. Bruce Fields if (status) 4201e8ff2a84SJ. Bruce Fields return status; 42021da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 42031da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 42041da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 42051da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 42061da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 420702cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 42081da177e4SLinus Torvalds } 42095282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 42105282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 42111da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 42121da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 42131da177e4SLinus Torvalds } 42141da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 42151da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 42161da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 42171da177e4SLinus Torvalds } 42181da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 42191da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 42201da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 42211da177e4SLinus Torvalds } 42221da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 42231da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 42241da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 42251da177e4SLinus Torvalds } 42261da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 42271da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 42281da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 42291da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4230ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4231e8ff2a84SJ. Bruce Fields return 0; 4232ac4d8ff2SNeilBrown } 4233ac4d8ff2SNeilBrown 4234190e4fbfSNeilBrown static void 4235190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4236190e4fbfSNeilBrown { 4237190e4fbfSNeilBrown int status; 4238190e4fbfSNeilBrown 42390964a3d3SNeilBrown nfs4_lock_state(); 42400964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 4241190e4fbfSNeilBrown status = nfsd4_recdir_load(); 42420964a3d3SNeilBrown nfs4_unlock_state(); 4243190e4fbfSNeilBrown if (status) 4244190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4245190e4fbfSNeilBrown } 4246190e4fbfSNeilBrown 4247c2f1a551SMeelap Shah /* 4248c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4249c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4250c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4251c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4252c2f1a551SMeelap Shah * 4253c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4254c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4255c2f1a551SMeelap Shah */ 4256c2f1a551SMeelap Shah static void 4257c2f1a551SMeelap Shah set_max_delegations(void) 4258c2f1a551SMeelap Shah { 4259c2f1a551SMeelap Shah /* 4260c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4261c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4262c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4263c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4264c2f1a551SMeelap Shah */ 4265c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4266c2f1a551SMeelap Shah } 4267c2f1a551SMeelap Shah 4268ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4269ac4d8ff2SNeilBrown 427029ab23ccSJ. Bruce Fields static int 4271ac4d8ff2SNeilBrown __nfs4_state_start(void) 4272ac4d8ff2SNeilBrown { 4273b5a1a81eSJ. Bruce Fields int ret; 4274b5a1a81eSJ. Bruce Fields 42751da177e4SLinus Torvalds boot_time = get_seconds(); 4276af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 42779a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4278e46b498cSJ. Bruce Fields nfsd4_grace); 4279b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4280b5a1a81eSJ. Bruce Fields if (ret) 4281b5a1a81eSJ. Bruce Fields return -ENOMEM; 428258da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 428329ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 428429ab23ccSJ. Bruce Fields return -ENOMEM; 4285b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4286b5a1a81eSJ. Bruce Fields if (ret) 4287b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4288e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4289c2f1a551SMeelap Shah set_max_delegations(); 4290b5a1a81eSJ. Bruce Fields return 0; 4291b5a1a81eSJ. Bruce Fields out_free_laundry: 4292b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4293b5a1a81eSJ. Bruce Fields return ret; 42941da177e4SLinus Torvalds } 42951da177e4SLinus Torvalds 429629ab23ccSJ. Bruce Fields int 429776a3550eSNeilBrown nfs4_state_start(void) 42981da177e4SLinus Torvalds { 4299190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 43004ad9a344SJeff Layton return __nfs4_state_start(); 43011da177e4SLinus Torvalds } 43021da177e4SLinus Torvalds 43031da177e4SLinus Torvalds static void 43041da177e4SLinus Torvalds __nfs4_state_shutdown(void) 43051da177e4SLinus Torvalds { 43061da177e4SLinus Torvalds int i; 43071da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 43081da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 43091da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 43101da177e4SLinus Torvalds 43111da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 43121da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 43131da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 43141da177e4SLinus Torvalds expire_client(clp); 43151da177e4SLinus Torvalds } 43161da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 43171da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 43181da177e4SLinus Torvalds expire_client(clp); 43191da177e4SLinus Torvalds } 43201da177e4SLinus Torvalds } 43211da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 43221da177e4SLinus Torvalds spin_lock(&recall_lock); 43231da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 43241da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 43251da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 43261da177e4SLinus Torvalds } 43271da177e4SLinus Torvalds spin_unlock(&recall_lock); 43281da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 43291da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 43301da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 43311da177e4SLinus Torvalds unhash_delegation(dp); 43321da177e4SLinus Torvalds } 43331da177e4SLinus Torvalds 4334190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 43351da177e4SLinus Torvalds } 43361da177e4SLinus Torvalds 43371da177e4SLinus Torvalds void 43381da177e4SLinus Torvalds nfs4_state_shutdown(void) 43391da177e4SLinus Torvalds { 43405e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 43415e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 43422c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 43431da177e4SLinus Torvalds nfs4_lock_state(); 43441da177e4SLinus Torvalds nfs4_release_reclaim(); 43451da177e4SLinus Torvalds __nfs4_state_shutdown(); 43461da177e4SLinus Torvalds nfs4_unlock_state(); 4347c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 43481da177e4SLinus Torvalds } 43491da177e4SLinus Torvalds 43503dd98a3bSJeff Layton /* 43513dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 43523dd98a3bSJeff Layton * accessed when nfsd is starting. 43533dd98a3bSJeff Layton */ 43540964a3d3SNeilBrown static void 43550964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 43560964a3d3SNeilBrown { 43570964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 43580964a3d3SNeilBrown } 43590964a3d3SNeilBrown 43600964a3d3SNeilBrown /* 43610964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 43620964a3d3SNeilBrown */ 43630964a3d3SNeilBrown int 43640964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 43650964a3d3SNeilBrown { 43660964a3d3SNeilBrown int status; 4367a63bb996SAl Viro struct path path; 43680964a3d3SNeilBrown 4369a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 43700964a3d3SNeilBrown if (status) 43710964a3d3SNeilBrown return status; 43720964a3d3SNeilBrown status = -ENOTDIR; 4373a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 43740964a3d3SNeilBrown nfs4_set_recdir(recdir); 43750964a3d3SNeilBrown status = 0; 43760964a3d3SNeilBrown } 4377a63bb996SAl Viro path_put(&path); 43780964a3d3SNeilBrown return status; 43790964a3d3SNeilBrown } 43800964a3d3SNeilBrown 43813dd98a3bSJeff Layton char * 43823dd98a3bSJeff Layton nfs4_recoverydir(void) 43833dd98a3bSJeff Layton { 43843dd98a3bSJeff Layton return user_recovery_dirname; 43853dd98a3bSJeff Layton } 4386