Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfsd/nfs4state.c |
| 3 | * |
| 4 | * Copyright (c) 2001 The Regents of the University of Michigan. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Kendrick Smith <kmsmith@umich.edu> |
| 8 | * Andy Adamson <kandros@umich.edu> |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * 3. Neither the name of the University nor the names of its |
| 20 | * contributors may be used to endorse or promote products derived |
| 21 | * from this software without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 34 | * |
| 35 | */ |
| 36 | |
| 37 | #include <linux/param.h> |
| 38 | #include <linux/major.h> |
| 39 | #include <linux/slab.h> |
| 40 | |
| 41 | #include <linux/sunrpc/svc.h> |
| 42 | #include <linux/nfsd/nfsd.h> |
| 43 | #include <linux/nfsd/cache.h> |
Dave Hansen | aceaf78 | 2008-02-15 14:37:31 -0800 | [diff] [blame] | 44 | #include <linux/file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <linux/mount.h> |
| 46 | #include <linux/workqueue.h> |
| 47 | #include <linux/smp_lock.h> |
| 48 | #include <linux/kthread.h> |
| 49 | #include <linux/nfs4.h> |
| 50 | #include <linux/nfsd/state.h> |
| 51 | #include <linux/nfsd/xdr4.h> |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 52 | #include <linux/namei.h> |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 53 | #include <linux/swap.h> |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 54 | #include <linux/mutex.h> |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 55 | #include <linux/lockd/bind.h> |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 56 | #include <linux/module.h> |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 57 | #include <linux/sunrpc/svcauth_gss.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 60 | |
| 61 | /* Globals */ |
| 62 | static time_t lease_time = 90; /* default lease time */ |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 63 | static time_t user_lease_time = 90; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 64 | static time_t boot_time; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | static u32 current_ownerid = 1; |
| 66 | static u32 current_fileid = 1; |
| 67 | static u32 current_delegid = 1; |
| 68 | static u32 nfs4_init; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 69 | static stateid_t zerostateid; /* bits all 0 */ |
| 70 | static stateid_t onestateid; /* bits all 1 */ |
| 71 | |
| 72 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) |
| 73 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | /* forward declarations */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 76 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 78 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
| 79 | static void nfs4_set_recdir(char *recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame^] | 81 | /* Locking: */ |
| 82 | |
| 83 | /* Currently used for almost all code touching nfsv4 state: */ |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 84 | static DEFINE_MUTEX(client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame^] | 86 | /* |
| 87 | * Currently used for the del_recall_lru and file hash table. In an |
| 88 | * effort to decrease the scope of the client_mutex, this spinlock may |
| 89 | * eventually cover more: |
| 90 | */ |
| 91 | static DEFINE_SPINLOCK(recall_lock); |
| 92 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 93 | static struct kmem_cache *stateowner_slab = NULL; |
| 94 | static struct kmem_cache *file_slab = NULL; |
| 95 | static struct kmem_cache *stateid_slab = NULL; |
| 96 | static struct kmem_cache *deleg_slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | void |
| 99 | nfs4_lock_state(void) |
| 100 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 101 | mutex_lock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | void |
| 105 | nfs4_unlock_state(void) |
| 106 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 107 | mutex_unlock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | static inline u32 |
| 111 | opaque_hashval(const void *ptr, int nbytes) |
| 112 | { |
| 113 | unsigned char *cptr = (unsigned char *) ptr; |
| 114 | |
| 115 | u32 x = 0; |
| 116 | while (nbytes--) { |
| 117 | x *= 37; |
| 118 | x += *cptr++; |
| 119 | } |
| 120 | return x; |
| 121 | } |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | static struct list_head del_recall_lru; |
| 124 | |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 125 | static inline void |
| 126 | put_nfs4_file(struct nfs4_file *fi) |
| 127 | { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame^] | 128 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
| 129 | list_del(&fi->fi_hash); |
| 130 | spin_unlock(&recall_lock); |
| 131 | iput(fi->fi_inode); |
| 132 | kmem_cache_free(file_slab, fi); |
| 133 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | static inline void |
| 137 | get_nfs4_file(struct nfs4_file *fi) |
| 138 | { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame^] | 139 | atomic_inc(&fi->fi_ref); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 140 | } |
| 141 | |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 142 | static int num_delegations; |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 143 | unsigned int max_delegations; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 144 | |
| 145 | /* |
| 146 | * Open owner state (share locks) |
| 147 | */ |
| 148 | |
| 149 | /* hash tables for nfs4_stateowner */ |
| 150 | #define OWNER_HASH_BITS 8 |
| 151 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) |
| 152 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) |
| 153 | |
| 154 | #define ownerid_hashval(id) \ |
| 155 | ((id) & OWNER_HASH_MASK) |
| 156 | #define ownerstr_hashval(clientid, ownername) \ |
| 157 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) |
| 158 | |
| 159 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; |
| 160 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
| 161 | |
| 162 | /* hash table for nfs4_file */ |
| 163 | #define FILE_HASH_BITS 8 |
| 164 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) |
| 165 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) |
| 166 | /* hash table for (open)nfs4_stateid */ |
| 167 | #define STATEID_HASH_BITS 10 |
| 168 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) |
| 169 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) |
| 170 | |
| 171 | #define file_hashval(x) \ |
| 172 | hash_ptr(x, FILE_HASH_BITS) |
| 173 | #define stateid_hashval(owner_id, file_id) \ |
| 174 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) |
| 175 | |
| 176 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
| 177 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; |
| 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | static struct nfs4_delegation * |
| 180 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) |
| 181 | { |
| 182 | struct nfs4_delegation *dp; |
| 183 | struct nfs4_file *fp = stp->st_file; |
| 184 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; |
| 185 | |
| 186 | dprintk("NFSD alloc_init_deleg\n"); |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 187 | if (fp->fi_had_conflict) |
| 188 | return NULL; |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 189 | if (num_delegations > max_delegations) |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 190 | return NULL; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 191 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
| 192 | if (dp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | return dp; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 194 | num_delegations++; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 195 | INIT_LIST_HEAD(&dp->dl_perfile); |
| 196 | INIT_LIST_HEAD(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
| 198 | dp->dl_client = clp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 199 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | dp->dl_file = fp; |
| 201 | dp->dl_flock = NULL; |
| 202 | get_file(stp->st_vfs_file); |
| 203 | dp->dl_vfs_file = stp->st_vfs_file; |
| 204 | dp->dl_type = type; |
| 205 | dp->dl_recall.cbr_dp = NULL; |
| 206 | dp->dl_recall.cbr_ident = cb->cb_ident; |
| 207 | dp->dl_recall.cbr_trunc = 0; |
| 208 | dp->dl_stateid.si_boot = boot_time; |
| 209 | dp->dl_stateid.si_stateownerid = current_delegid++; |
| 210 | dp->dl_stateid.si_fileid = 0; |
| 211 | dp->dl_stateid.si_generation = 0; |
J. Bruce Fields | 6c02eaa | 2009-02-02 17:30:51 -0500 | [diff] [blame] | 212 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | dp->dl_time = 0; |
| 214 | atomic_set(&dp->dl_count, 1); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 215 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
| 216 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | return dp; |
| 218 | } |
| 219 | |
| 220 | void |
| 221 | nfs4_put_delegation(struct nfs4_delegation *dp) |
| 222 | { |
| 223 | if (atomic_dec_and_test(&dp->dl_count)) { |
| 224 | dprintk("NFSD: freeing dp %p\n",dp); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 225 | put_nfs4_file(dp->dl_file); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 226 | kmem_cache_free(deleg_slab, dp); |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 227 | num_delegations--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | } |
| 229 | } |
| 230 | |
| 231 | /* Remove the associated file_lock first, then remove the delegation. |
| 232 | * lease_modify() is called to remove the FS_LEASE file_lock from |
| 233 | * the i_flock list, eventually calling nfsd's lock_manager |
| 234 | * fl_release_callback. |
| 235 | */ |
| 236 | static void |
| 237 | nfs4_close_delegation(struct nfs4_delegation *dp) |
| 238 | { |
| 239 | struct file *filp = dp->dl_vfs_file; |
| 240 | |
| 241 | dprintk("NFSD: close_delegation dp %p\n",dp); |
| 242 | dp->dl_vfs_file = NULL; |
| 243 | /* The following nfsd_close may not actually close the file, |
| 244 | * but we want to remove the lease in any case. */ |
NeilBrown | c907132 | 2005-04-16 15:26:38 -0700 | [diff] [blame] | 245 | if (dp->dl_flock) |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 246 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | nfsd_close(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | } |
| 249 | |
| 250 | /* Called under the state lock. */ |
| 251 | static void |
| 252 | unhash_delegation(struct nfs4_delegation *dp) |
| 253 | { |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 254 | list_del_init(&dp->dl_perfile); |
| 255 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | spin_lock(&recall_lock); |
| 257 | list_del_init(&dp->dl_recall_lru); |
| 258 | spin_unlock(&recall_lock); |
| 259 | nfs4_close_delegation(dp); |
| 260 | nfs4_put_delegation(dp); |
| 261 | } |
| 262 | |
| 263 | /* |
| 264 | * SETCLIENTID state |
| 265 | */ |
| 266 | |
| 267 | /* Hash tables for nfs4_clientid state */ |
| 268 | #define CLIENT_HASH_BITS 4 |
| 269 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) |
| 270 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) |
| 271 | |
| 272 | #define clientid_hashval(id) \ |
| 273 | ((id) & CLIENT_HASH_MASK) |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 274 | #define clientstr_hashval(name) \ |
| 275 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | /* |
| 277 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot |
| 278 | * used in reboot/reset lease grace period processing |
| 279 | * |
| 280 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed |
| 281 | * setclientid_confirmed info. |
| 282 | * |
| 283 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed |
| 284 | * setclientid info. |
| 285 | * |
| 286 | * client_lru holds client queue ordered by nfs4_client.cl_time |
| 287 | * for lease renewal. |
| 288 | * |
| 289 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time |
| 290 | * for last close replay. |
| 291 | */ |
| 292 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; |
| 293 | static int reclaim_str_hashtbl_size = 0; |
| 294 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 295 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 296 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 297 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 298 | static struct list_head client_lru; |
| 299 | static struct list_head close_lru; |
| 300 | |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 301 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
| 302 | { |
| 303 | list_del(&stp->st_hash); |
| 304 | list_del(&stp->st_perfile); |
| 305 | list_del(&stp->st_perstateowner); |
| 306 | } |
| 307 | |
| 308 | static void free_generic_stateid(struct nfs4_stateid *stp) |
| 309 | { |
| 310 | put_nfs4_file(stp->st_file); |
| 311 | kmem_cache_free(stateid_slab, stp); |
| 312 | } |
| 313 | |
| 314 | static void release_lock_stateid(struct nfs4_stateid *stp) |
| 315 | { |
| 316 | unhash_generic_stateid(stp); |
| 317 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); |
| 318 | free_generic_stateid(stp); |
| 319 | } |
| 320 | |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 321 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
| 322 | { |
| 323 | struct nfs4_stateid *stp; |
| 324 | |
| 325 | list_del(&sop->so_idhash); |
| 326 | list_del(&sop->so_strhash); |
| 327 | list_del(&sop->so_perstateid); |
| 328 | while (!list_empty(&sop->so_stateids)) { |
| 329 | stp = list_first_entry(&sop->so_stateids, |
| 330 | struct nfs4_stateid, st_perstateowner); |
| 331 | release_lock_stateid(stp); |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | static void release_lockowner(struct nfs4_stateowner *sop) |
| 336 | { |
| 337 | unhash_lockowner(sop); |
| 338 | nfs4_put_stateowner(sop); |
| 339 | } |
| 340 | |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 341 | static void |
| 342 | release_stateid_lockowners(struct nfs4_stateid *open_stp) |
| 343 | { |
| 344 | struct nfs4_stateowner *lock_sop; |
| 345 | |
| 346 | while (!list_empty(&open_stp->st_lockowners)) { |
| 347 | lock_sop = list_entry(open_stp->st_lockowners.next, |
| 348 | struct nfs4_stateowner, so_perstateid); |
| 349 | /* list_del(&open_stp->st_lockowners); */ |
| 350 | BUG_ON(lock_sop->so_is_open_owner); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 351 | release_lockowner(lock_sop); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 352 | } |
| 353 | } |
| 354 | |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 355 | static void release_open_stateid(struct nfs4_stateid *stp) |
| 356 | { |
| 357 | unhash_generic_stateid(stp); |
| 358 | release_stateid_lockowners(stp); |
| 359 | nfsd_close(stp->st_vfs_file); |
| 360 | free_generic_stateid(stp); |
| 361 | } |
| 362 | |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 363 | static void unhash_openowner(struct nfs4_stateowner *sop) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 364 | { |
| 365 | struct nfs4_stateid *stp; |
| 366 | |
| 367 | list_del(&sop->so_idhash); |
| 368 | list_del(&sop->so_strhash); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 369 | list_del(&sop->so_perclient); |
| 370 | list_del(&sop->so_perstateid); /* XXX: necessary? */ |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 371 | while (!list_empty(&sop->so_stateids)) { |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 372 | stp = list_first_entry(&sop->so_stateids, |
| 373 | struct nfs4_stateid, st_perstateowner); |
| 374 | release_open_stateid(stp); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 375 | } |
| 376 | } |
| 377 | |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 378 | static void release_openowner(struct nfs4_stateowner *sop) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 379 | { |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 380 | unhash_openowner(sop); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 381 | list_del(&sop->so_close_lru); |
| 382 | nfs4_put_stateowner(sop); |
| 383 | } |
| 384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | static inline void |
| 386 | renew_client(struct nfs4_client *clp) |
| 387 | { |
| 388 | /* |
| 389 | * Move client to the end to the LRU list. |
| 390 | */ |
| 391 | dprintk("renewing client (clientid %08x/%08x)\n", |
| 392 | clp->cl_clientid.cl_boot, |
| 393 | clp->cl_clientid.cl_id); |
| 394 | list_move_tail(&clp->cl_lru, &client_lru); |
| 395 | clp->cl_time = get_seconds(); |
| 396 | } |
| 397 | |
| 398 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
| 399 | static int |
| 400 | STALE_CLIENTID(clientid_t *clid) |
| 401 | { |
| 402 | if (clid->cl_boot == boot_time) |
| 403 | return 0; |
| 404 | dprintk("NFSD stale clientid (%08x/%08x)\n", |
| 405 | clid->cl_boot, clid->cl_id); |
| 406 | return 1; |
| 407 | } |
| 408 | |
| 409 | /* |
| 410 | * XXX Should we use a slab cache ? |
| 411 | * This type of memory management is somewhat inefficient, but we use it |
| 412 | * anyway since SETCLIENTID is not a common operation. |
| 413 | */ |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 414 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | { |
| 416 | struct nfs4_client *clp; |
| 417 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 418 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
| 419 | if (clp == NULL) |
| 420 | return NULL; |
| 421 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); |
| 422 | if (clp->cl_name.data == NULL) { |
| 423 | kfree(clp); |
| 424 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | } |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 426 | memcpy(clp->cl_name.data, name.data, name.len); |
| 427 | clp->cl_name.len = name.len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | return clp; |
| 429 | } |
| 430 | |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 431 | static void |
| 432 | shutdown_callback_client(struct nfs4_client *clp) |
| 433 | { |
| 434 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; |
| 435 | |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 436 | if (clnt) { |
J. Bruce Fields | 404ec11 | 2007-11-23 22:26:18 -0500 | [diff] [blame] | 437 | /* |
| 438 | * Callback threads take a reference on the client, so there |
| 439 | * should be no outstanding callbacks at this point. |
| 440 | */ |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 441 | clp->cl_callback.cb_client = NULL; |
| 442 | rpc_shutdown_client(clnt); |
| 443 | } |
| 444 | } |
| 445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | static inline void |
| 447 | free_client(struct nfs4_client *clp) |
| 448 | { |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 449 | shutdown_callback_client(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if (clp->cl_cred.cr_group_info) |
| 451 | put_group_info(clp->cl_cred.cr_group_info); |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 452 | kfree(clp->cl_principal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | kfree(clp->cl_name.data); |
| 454 | kfree(clp); |
| 455 | } |
| 456 | |
| 457 | void |
| 458 | put_nfs4_client(struct nfs4_client *clp) |
| 459 | { |
| 460 | if (atomic_dec_and_test(&clp->cl_count)) |
| 461 | free_client(clp); |
| 462 | } |
| 463 | |
| 464 | static void |
| 465 | expire_client(struct nfs4_client *clp) |
| 466 | { |
| 467 | struct nfs4_stateowner *sop; |
| 468 | struct nfs4_delegation *dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | struct list_head reaplist; |
| 470 | |
| 471 | dprintk("NFSD: expire_client cl_count %d\n", |
| 472 | atomic_read(&clp->cl_count)); |
| 473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | INIT_LIST_HEAD(&reaplist); |
| 475 | spin_lock(&recall_lock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 476 | while (!list_empty(&clp->cl_delegations)) { |
| 477 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
| 479 | dp->dl_flock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 480 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | list_move(&dp->dl_recall_lru, &reaplist); |
| 482 | } |
| 483 | spin_unlock(&recall_lock); |
| 484 | while (!list_empty(&reaplist)) { |
| 485 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
| 486 | list_del_init(&dp->dl_recall_lru); |
| 487 | unhash_delegation(dp); |
| 488 | } |
| 489 | list_del(&clp->cl_idhash); |
| 490 | list_del(&clp->cl_strhash); |
| 491 | list_del(&clp->cl_lru); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 492 | while (!list_empty(&clp->cl_openowners)) { |
| 493 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 494 | release_openowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | } |
| 496 | put_nfs4_client(clp); |
| 497 | } |
| 498 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 499 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
| 500 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | struct nfs4_client *clp; |
| 502 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 503 | clp = alloc_client(name); |
| 504 | if (clp == NULL) |
| 505 | return NULL; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 506 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | atomic_set(&clp->cl_count, 1); |
| 508 | atomic_set(&clp->cl_callback.cb_set, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | INIT_LIST_HEAD(&clp->cl_idhash); |
| 510 | INIT_LIST_HEAD(&clp->cl_strhash); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 511 | INIT_LIST_HEAD(&clp->cl_openowners); |
| 512 | INIT_LIST_HEAD(&clp->cl_delegations); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | INIT_LIST_HEAD(&clp->cl_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | return clp; |
| 515 | } |
| 516 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 517 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
| 518 | { |
| 519 | memcpy(target->cl_verifier.data, source->data, |
| 520 | sizeof(target->cl_verifier.data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | } |
| 522 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 523 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
| 524 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
| 526 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; |
| 527 | } |
| 528 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 529 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
| 530 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | target->cr_uid = source->cr_uid; |
| 532 | target->cr_gid = source->cr_gid; |
| 533 | target->cr_group_info = source->cr_group_info; |
| 534 | get_group_info(target->cr_group_info); |
| 535 | } |
| 536 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 537 | static int same_name(const char *n1, const char *n2) |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 538 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 539 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | } |
| 541 | |
| 542 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 543 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
| 544 | { |
| 545 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 549 | same_clid(clientid_t *cl1, clientid_t *cl2) |
| 550 | { |
| 551 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | /* XXX what about NGROUP */ |
| 555 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 556 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
| 557 | { |
| 558 | return cr1->cr_uid == cr2->cr_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | } |
| 560 | |
J. Bruce Fields | 5ec7b46 | 2007-11-21 21:58:56 -0500 | [diff] [blame] | 561 | static void gen_clid(struct nfs4_client *clp) |
| 562 | { |
| 563 | static u32 current_clientid = 1; |
| 564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | clp->cl_clientid.cl_boot = boot_time; |
| 566 | clp->cl_clientid.cl_id = current_clientid++; |
| 567 | } |
| 568 | |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 569 | static void gen_confirm(struct nfs4_client *clp) |
| 570 | { |
| 571 | static u32 i; |
| 572 | u32 *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | p = (u32 *)clp->cl_confirm.data; |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 575 | *p++ = get_seconds(); |
| 576 | *p++ = i++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | } |
| 578 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 579 | static int check_name(struct xdr_netobj name) |
| 580 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | if (name.len == 0) |
| 582 | return 0; |
| 583 | if (name.len > NFS4_OPAQUE_LIMIT) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 584 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | return 0; |
| 586 | } |
| 587 | return 1; |
| 588 | } |
| 589 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 590 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
| 592 | { |
| 593 | unsigned int idhashval; |
| 594 | |
| 595 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); |
| 596 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 597 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); |
| 598 | list_add_tail(&clp->cl_lru, &client_lru); |
| 599 | clp->cl_time = get_seconds(); |
| 600 | } |
| 601 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 602 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | move_to_confirmed(struct nfs4_client *clp) |
| 604 | { |
| 605 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 606 | unsigned int strhashval; |
| 607 | |
| 608 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
| 609 | list_del_init(&clp->cl_strhash); |
Akinobu Mita | f116629 | 2006-06-26 00:24:46 -0700 | [diff] [blame] | 610 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 611 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
| 613 | renew_client(clp); |
| 614 | } |
| 615 | |
| 616 | static struct nfs4_client * |
| 617 | find_confirmed_client(clientid_t *clid) |
| 618 | { |
| 619 | struct nfs4_client *clp; |
| 620 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 621 | |
| 622 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 623 | if (same_clid(&clp->cl_clientid, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | return clp; |
| 625 | } |
| 626 | return NULL; |
| 627 | } |
| 628 | |
| 629 | static struct nfs4_client * |
| 630 | find_unconfirmed_client(clientid_t *clid) |
| 631 | { |
| 632 | struct nfs4_client *clp; |
| 633 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 634 | |
| 635 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 636 | if (same_clid(&clp->cl_clientid, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | return clp; |
| 638 | } |
| 639 | return NULL; |
| 640 | } |
| 641 | |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 642 | static struct nfs4_client * |
| 643 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
| 644 | { |
| 645 | struct nfs4_client *clp; |
| 646 | |
| 647 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { |
| 648 | if (same_name(clp->cl_recdir, dname)) |
| 649 | return clp; |
| 650 | } |
| 651 | return NULL; |
| 652 | } |
| 653 | |
| 654 | static struct nfs4_client * |
| 655 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
| 656 | { |
| 657 | struct nfs4_client *clp; |
| 658 | |
| 659 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { |
| 660 | if (same_name(clp->cl_recdir, dname)) |
| 661 | return clp; |
| 662 | } |
| 663 | return NULL; |
| 664 | } |
| 665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | /* a helper function for parse_callback */ |
| 667 | static int |
| 668 | parse_octet(unsigned int *lenp, char **addrp) |
| 669 | { |
| 670 | unsigned int len = *lenp; |
| 671 | char *p = *addrp; |
| 672 | int n = -1; |
| 673 | char c; |
| 674 | |
| 675 | for (;;) { |
| 676 | if (!len) |
| 677 | break; |
| 678 | len--; |
| 679 | c = *p++; |
| 680 | if (c == '.') |
| 681 | break; |
| 682 | if ((c < '0') || (c > '9')) { |
| 683 | n = -1; |
| 684 | break; |
| 685 | } |
| 686 | if (n < 0) |
| 687 | n = 0; |
| 688 | n = (n * 10) + (c - '0'); |
| 689 | if (n > 255) { |
| 690 | n = -1; |
| 691 | break; |
| 692 | } |
| 693 | } |
| 694 | *lenp = len; |
| 695 | *addrp = p; |
| 696 | return n; |
| 697 | } |
| 698 | |
| 699 | /* parse and set the setclientid ipv4 callback address */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 700 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
| 702 | { |
| 703 | int temp = 0; |
| 704 | u32 cbaddr = 0; |
| 705 | u16 cbport = 0; |
| 706 | u32 addrlen = addr_len; |
| 707 | char *addr = addr_val; |
| 708 | int i, shift; |
| 709 | |
| 710 | /* ipaddress */ |
| 711 | shift = 24; |
| 712 | for(i = 4; i > 0 ; i--) { |
| 713 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { |
| 714 | return 0; |
| 715 | } |
| 716 | cbaddr |= (temp << shift); |
| 717 | if (shift > 0) |
| 718 | shift -= 8; |
| 719 | } |
| 720 | *cbaddrp = cbaddr; |
| 721 | |
| 722 | /* port */ |
| 723 | shift = 8; |
| 724 | for(i = 2; i > 0 ; i--) { |
| 725 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { |
| 726 | return 0; |
| 727 | } |
| 728 | cbport |= (temp << shift); |
| 729 | if (shift > 0) |
| 730 | shift -= 8; |
| 731 | } |
| 732 | *cbportp = cbport; |
| 733 | return 1; |
| 734 | } |
| 735 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 736 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
| 738 | { |
| 739 | struct nfs4_callback *cb = &clp->cl_callback; |
| 740 | |
| 741 | /* Currently, we only support tcp for the callback channel */ |
| 742 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) |
| 743 | goto out_err; |
| 744 | |
| 745 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, |
| 746 | &cb->cb_addr, &cb->cb_port))) |
| 747 | goto out_err; |
| 748 | cb->cb_prog = se->se_callback_prog; |
| 749 | cb->cb_ident = se->se_callback_ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | return; |
| 751 | out_err: |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 752 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | "will not receive delegations\n", |
| 754 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 755 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | return; |
| 757 | } |
| 758 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 759 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 760 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 761 | struct nfsd4_setclientid *setclid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | { |
Chuck Lever | 27459f0 | 2007-02-12 00:53:34 -0800 | [diff] [blame] | 763 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | struct xdr_netobj clname = { |
| 765 | .len = setclid->se_namelen, |
| 766 | .data = setclid->se_name, |
| 767 | }; |
| 768 | nfs4_verifier clverifier = setclid->se_verf; |
| 769 | unsigned int strhashval; |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 770 | struct nfs4_client *conf, *unconf, *new; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 771 | __be32 status; |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 772 | char *princ; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 773 | char dname[HEXDIR_LEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | if (!check_name(clname)) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 776 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 778 | status = nfs4_make_rec_clidname(dname, &clname); |
| 779 | if (status) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 780 | return status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | /* |
| 783 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 784 | * We get here on a DRC miss. |
| 785 | */ |
| 786 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 787 | strhashval = clientstr_hashval(dname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | nfs4_lock_state(); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 790 | conf = find_confirmed_client_by_str(dname, strhashval); |
| 791 | if (conf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 792 | /* RFC 3530 14.2.33 CASE 0: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | status = nfserr_clid_inuse; |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 794 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) |
Chuck Lever | 27459f0 | 2007-02-12 00:53:34 -0800 | [diff] [blame] | 795 | || conf->cl_addr != sin->sin_addr.s_addr) { |
Harvey Harrison | be85940 | 2008-10-31 00:56:28 -0700 | [diff] [blame] | 796 | dprintk("NFSD: setclientid: string in use by clientat %pI4\n", |
| 797 | &conf->cl_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | goto out; |
| 799 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | } |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 801 | /* |
| 802 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") |
| 803 | * has a description of SETCLIENTID request processing consisting |
| 804 | * of 5 bullet points, labeled as CASE0 - CASE4 below. |
| 805 | */ |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 806 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | status = nfserr_resource; |
| 808 | if (!conf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 809 | /* |
| 810 | * RFC 3530 14.2.33 CASE 4: |
| 811 | * placed first, because it is the normal case |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | */ |
| 813 | if (unconf) |
| 814 | expire_client(unconf); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 815 | new = create_client(clname, dname); |
| 816 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | gen_clid(new); |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 819 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 821 | * RFC 3530 14.2.33 CASE 1: |
| 822 | * probable callback update |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | */ |
NeilBrown | 31f4a6c | 2005-06-23 22:04:06 -0700 | [diff] [blame] | 824 | if (unconf) { |
| 825 | /* Note this is removing unconfirmed {*x***}, |
| 826 | * which is stronger than RFC recommended {vxc**}. |
| 827 | * This has the advantage that there is at most |
| 828 | * one {*x***} in either list at any time. |
| 829 | */ |
| 830 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 832 | new = create_client(clname, dname); |
| 833 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | copy_clid(new, conf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | } else if (!unconf) { |
| 837 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 838 | * RFC 3530 14.2.33 CASE 2: |
| 839 | * probable client reboot; state will be removed if |
| 840 | * confirmed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | */ |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 842 | new = create_client(clname, dname); |
| 843 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | gen_clid(new); |
J. Bruce Fields | 49ba878 | 2007-11-19 19:09:50 -0500 | [diff] [blame] | 846 | } else { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 847 | /* |
| 848 | * RFC 3530 14.2.33 CASE 3: |
| 849 | * probable client reboot; state will be removed if |
| 850 | * confirmed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | */ |
| 852 | expire_client(unconf); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 853 | new = create_client(clname, dname); |
| 854 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | gen_clid(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | } |
J. Bruce Fields | c175b83 | 2007-08-09 18:34:32 -0400 | [diff] [blame] | 858 | copy_verf(new, &clverifier); |
| 859 | new->cl_addr = sin->sin_addr.s_addr; |
Olga Kornievskaia | 61054b1 | 2008-12-23 16:19:00 -0500 | [diff] [blame] | 860 | new->cl_flavor = rqstp->rq_flavor; |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 861 | princ = svc_gss_principal(rqstp); |
| 862 | if (princ) { |
| 863 | new->cl_principal = kstrdup(princ, GFP_KERNEL); |
| 864 | if (new->cl_principal == NULL) { |
| 865 | free_client(new); |
| 866 | goto out; |
| 867 | } |
| 868 | } |
J. Bruce Fields | c175b83 | 2007-08-09 18:34:32 -0400 | [diff] [blame] | 869 | copy_cred(&new->cl_cred, &rqstp->rq_cred); |
| 870 | gen_confirm(new); |
| 871 | gen_callback(new, setclid); |
| 872 | add_to_unconfirmed(new, strhashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
| 874 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; |
| 875 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); |
| 876 | status = nfs_ok; |
| 877 | out: |
| 878 | nfs4_unlock_state(); |
| 879 | return status; |
| 880 | } |
| 881 | |
| 882 | |
| 883 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 884 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
| 885 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 |
| 886 | * bullets, labeled as CASE1 - CASE4 below. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 888 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 889 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
| 890 | struct nfsd4_compound_state *cstate, |
| 891 | struct nfsd4_setclientid_confirm *setclientid_confirm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | { |
Chuck Lever | 27459f0 | 2007-02-12 00:53:34 -0800 | [diff] [blame] | 893 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 894 | struct nfs4_client *conf, *unconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
| 896 | clientid_t * clid = &setclientid_confirm->sc_clientid; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 897 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | |
| 899 | if (STALE_CLIENTID(clid)) |
| 900 | return nfserr_stale_clientid; |
| 901 | /* |
| 902 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 903 | * We get here on a DRC miss. |
| 904 | */ |
| 905 | |
| 906 | nfs4_lock_state(); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 907 | |
| 908 | conf = find_confirmed_client(clid); |
| 909 | unconf = find_unconfirmed_client(clid); |
| 910 | |
| 911 | status = nfserr_clid_inuse; |
Chuck Lever | 27459f0 | 2007-02-12 00:53:34 -0800 | [diff] [blame] | 912 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 913 | goto out; |
Chuck Lever | 27459f0 | 2007-02-12 00:53:34 -0800 | [diff] [blame] | 914 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 915 | goto out; |
| 916 | |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 917 | /* |
| 918 | * section 14.2.34 of RFC 3530 has a description of |
| 919 | * SETCLIENTID_CONFIRM request processing consisting |
| 920 | * of 4 bullet points, labeled as CASE1 - CASE4 below. |
| 921 | */ |
J. Bruce Fields | 366e0c1 | 2007-11-20 15:54:10 -0500 | [diff] [blame] | 922 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 923 | /* |
| 924 | * RFC 3530 14.2.34 CASE 1: |
| 925 | * callback update |
| 926 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 927 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | status = nfserr_clid_inuse; |
| 929 | else { |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 930 | /* XXX: We just turn off callbacks until we can handle |
| 931 | * change request correctly. */ |
NeilBrown | cb36d63 | 2005-06-23 22:04:23 -0700 | [diff] [blame] | 932 | atomic_set(&conf->cl_callback.cb_set, 0); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 933 | gen_confirm(conf); |
NeilBrown | 4630902 | 2005-07-07 17:59:10 -0700 | [diff] [blame] | 934 | nfsd4_remove_clid_dir(unconf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 935 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | status = nfs_ok; |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 937 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | } |
J. Bruce Fields | f3aba4e | 2007-11-20 16:52:07 -0500 | [diff] [blame] | 939 | } else if (conf && !unconf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 940 | /* |
| 941 | * RFC 3530 14.2.34 CASE 2: |
| 942 | * probable retransmitted request; play it safe and |
| 943 | * do nothing. |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 944 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 945 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | status = nfserr_clid_inuse; |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 947 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | status = nfs_ok; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 949 | } else if (!conf && unconf |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 950 | && same_verf(&unconf->cl_confirm, &confirm)) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 951 | /* |
| 952 | * RFC 3530 14.2.34 CASE 3: |
| 953 | * Normal case; new or rebooted client: |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 954 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 955 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | status = nfserr_clid_inuse; |
| 957 | } else { |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 958 | unsigned int hash = |
| 959 | clientstr_hashval(unconf->cl_recdir); |
| 960 | conf = find_confirmed_client_by_str(unconf->cl_recdir, |
| 961 | hash); |
| 962 | if (conf) { |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 963 | nfsd4_remove_clid_dir(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 964 | expire_client(conf); |
| 965 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | move_to_confirmed(unconf); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 967 | conf = unconf; |
J. Bruce Fields | 46f8a64 | 2007-11-22 13:54:18 -0500 | [diff] [blame] | 968 | nfsd4_probe_callback(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 969 | status = nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | } |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 971 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
| 972 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 973 | &confirm)))) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 974 | /* |
| 975 | * RFC 3530 14.2.34 CASE 4: |
| 976 | * Client probably hasn't noticed that we rebooted yet. |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 977 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | status = nfserr_stale_clientid; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 979 | } else { |
NeilBrown | 08e8987 | 2005-06-23 22:04:11 -0700 | [diff] [blame] | 980 | /* check that we have hit one of the cases...*/ |
| 981 | status = nfserr_clid_inuse; |
| 982 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | nfs4_unlock_state(); |
| 985 | return status; |
| 986 | } |
| 987 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | /* OPEN Share state helper functions */ |
| 989 | static inline struct nfs4_file * |
| 990 | alloc_init_file(struct inode *ino) |
| 991 | { |
| 992 | struct nfs4_file *fp; |
| 993 | unsigned int hashval = file_hashval(ino); |
| 994 | |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 995 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
| 996 | if (fp) { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame^] | 997 | atomic_set(&fp->fi_ref, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | INIT_LIST_HEAD(&fp->fi_hash); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 999 | INIT_LIST_HEAD(&fp->fi_stateids); |
| 1000 | INIT_LIST_HEAD(&fp->fi_delegations); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame^] | 1001 | spin_lock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame^] | 1003 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | fp->fi_inode = igrab(ino); |
| 1005 | fp->fi_id = current_fileid++; |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1006 | fp->fi_had_conflict = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | return fp; |
| 1008 | } |
| 1009 | return NULL; |
| 1010 | } |
| 1011 | |
| 1012 | static void |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 1013 | nfsd4_free_slab(struct kmem_cache **slab) |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1014 | { |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1015 | if (*slab == NULL) |
| 1016 | return; |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1017 | kmem_cache_destroy(*slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1018 | *slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1019 | } |
| 1020 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 1021 | void |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1022 | nfsd4_free_slabs(void) |
| 1023 | { |
| 1024 | nfsd4_free_slab(&stateowner_slab); |
| 1025 | nfsd4_free_slab(&file_slab); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1026 | nfsd4_free_slab(&stateid_slab); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1027 | nfsd4_free_slab(&deleg_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1028 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | |
| 1030 | static int |
| 1031 | nfsd4_init_slabs(void) |
| 1032 | { |
| 1033 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1034 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1035 | if (stateowner_slab == NULL) |
| 1036 | goto out_nomem; |
| 1037 | file_slab = kmem_cache_create("nfsd4_files", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1038 | sizeof(struct nfs4_file), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1039 | if (file_slab == NULL) |
| 1040 | goto out_nomem; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1041 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1042 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1043 | if (stateid_slab == NULL) |
| 1044 | goto out_nomem; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1045 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1046 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1047 | if (deleg_slab == NULL) |
| 1048 | goto out_nomem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | return 0; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1050 | out_nomem: |
| 1051 | nfsd4_free_slabs(); |
| 1052 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
| 1053 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | } |
| 1055 | |
| 1056 | void |
| 1057 | nfs4_free_stateowner(struct kref *kref) |
| 1058 | { |
| 1059 | struct nfs4_stateowner *sop = |
| 1060 | container_of(kref, struct nfs4_stateowner, so_ref); |
| 1061 | kfree(sop->so_owner.data); |
| 1062 | kmem_cache_free(stateowner_slab, sop); |
| 1063 | } |
| 1064 | |
| 1065 | static inline struct nfs4_stateowner * |
| 1066 | alloc_stateowner(struct xdr_netobj *owner) |
| 1067 | { |
| 1068 | struct nfs4_stateowner *sop; |
| 1069 | |
| 1070 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { |
| 1071 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { |
| 1072 | memcpy(sop->so_owner.data, owner->data, owner->len); |
| 1073 | sop->so_owner.len = owner->len; |
| 1074 | kref_init(&sop->so_ref); |
| 1075 | return sop; |
| 1076 | } |
| 1077 | kmem_cache_free(stateowner_slab, sop); |
| 1078 | } |
| 1079 | return NULL; |
| 1080 | } |
| 1081 | |
| 1082 | static struct nfs4_stateowner * |
| 1083 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
| 1084 | struct nfs4_stateowner *sop; |
| 1085 | struct nfs4_replay *rp; |
| 1086 | unsigned int idhashval; |
| 1087 | |
| 1088 | if (!(sop = alloc_stateowner(&open->op_owner))) |
| 1089 | return NULL; |
| 1090 | idhashval = ownerid_hashval(current_ownerid); |
| 1091 | INIT_LIST_HEAD(&sop->so_idhash); |
| 1092 | INIT_LIST_HEAD(&sop->so_strhash); |
| 1093 | INIT_LIST_HEAD(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1094 | INIT_LIST_HEAD(&sop->so_stateids); |
| 1095 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | INIT_LIST_HEAD(&sop->so_close_lru); |
| 1097 | sop->so_time = 0; |
| 1098 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); |
| 1099 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1100 | list_add(&sop->so_perclient, &clp->cl_openowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | sop->so_is_open_owner = 1; |
| 1102 | sop->so_id = current_ownerid++; |
| 1103 | sop->so_client = clp; |
| 1104 | sop->so_seqid = open->op_seqid; |
| 1105 | sop->so_confirmed = 0; |
| 1106 | rp = &sop->so_replay; |
Al Viro | de1ae28 | 2006-01-18 17:43:47 -0800 | [diff] [blame] | 1107 | rp->rp_status = nfserr_serverfault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | rp->rp_buflen = 0; |
| 1109 | rp->rp_buf = rp->rp_ibuf; |
| 1110 | return sop; |
| 1111 | } |
| 1112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | static inline void |
| 1114 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
| 1115 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 1116 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 1117 | |
| 1118 | INIT_LIST_HEAD(&stp->st_hash); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1119 | INIT_LIST_HEAD(&stp->st_perstateowner); |
| 1120 | INIT_LIST_HEAD(&stp->st_lockowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | INIT_LIST_HEAD(&stp->st_perfile); |
| 1122 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1123 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1124 | list_add(&stp->st_perfile, &fp->fi_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1126 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | stp->st_file = fp; |
| 1128 | stp->st_stateid.si_boot = boot_time; |
| 1129 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 1130 | stp->st_stateid.si_fileid = fp->fi_id; |
| 1131 | stp->st_stateid.si_generation = 0; |
| 1132 | stp->st_access_bmap = 0; |
| 1133 | stp->st_deny_bmap = 0; |
| 1134 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
| 1135 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 1136 | stp->st_openstp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | } |
| 1138 | |
| 1139 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | move_to_close_lru(struct nfs4_stateowner *sop) |
| 1141 | { |
| 1142 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); |
| 1143 | |
NeilBrown | 358dd55 | 2006-04-10 22:55:42 -0700 | [diff] [blame] | 1144 | list_move_tail(&sop->so_close_lru, &close_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | sop->so_time = get_seconds(); |
| 1146 | } |
| 1147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1149 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
| 1150 | clientid_t *clid) |
| 1151 | { |
| 1152 | return (sop->so_owner.len == owner->len) && |
| 1153 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && |
| 1154 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | } |
| 1156 | |
| 1157 | static struct nfs4_stateowner * |
| 1158 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
| 1159 | { |
| 1160 | struct nfs4_stateowner *so = NULL; |
| 1161 | |
| 1162 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1163 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | return so; |
| 1165 | } |
| 1166 | return NULL; |
| 1167 | } |
| 1168 | |
| 1169 | /* search file_hashtbl[] for file */ |
| 1170 | static struct nfs4_file * |
| 1171 | find_file(struct inode *ino) |
| 1172 | { |
| 1173 | unsigned int hashval = file_hashval(ino); |
| 1174 | struct nfs4_file *fp; |
| 1175 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame^] | 1176 | spin_lock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1178 | if (fp->fi_inode == ino) { |
| 1179 | get_nfs4_file(fp); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame^] | 1180 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | return fp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1182 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | } |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame^] | 1184 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | return NULL; |
| 1186 | } |
| 1187 | |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1188 | static inline int access_valid(u32 x) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1189 | { |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1190 | if (x < NFS4_SHARE_ACCESS_READ) |
| 1191 | return 0; |
| 1192 | if (x > NFS4_SHARE_ACCESS_BOTH) |
| 1193 | return 0; |
| 1194 | return 1; |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1195 | } |
| 1196 | |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1197 | static inline int deny_valid(u32 x) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1198 | { |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1199 | /* Note: unlike access bits, deny bits may be zero. */ |
| 1200 | return x <= NFS4_SHARE_DENY_BOTH; |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1201 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | |
J. Bruce Fields | 4f83aa3 | 2008-07-07 15:02:02 -0400 | [diff] [blame] | 1203 | /* |
| 1204 | * We store the NONE, READ, WRITE, and BOTH bits separately in the |
| 1205 | * st_{access,deny}_bmap field of the stateid, in order to track not |
| 1206 | * only what share bits are currently in force, but also what |
| 1207 | * combinations of share bits previous opens have used. This allows us |
| 1208 | * to enforce the recommendation of rfc 3530 14.2.19 that the server |
| 1209 | * return an error if the client attempt to downgrade to a combination |
| 1210 | * of share bits not explicable by closing some of its previous opens. |
| 1211 | * |
| 1212 | * XXX: This enforcement is actually incomplete, since we don't keep |
| 1213 | * track of access/deny bit combinations; so, e.g., we allow: |
| 1214 | * |
| 1215 | * OPEN allow read, deny write |
| 1216 | * OPEN allow both, deny none |
| 1217 | * DOWNGRADE allow read, deny none |
| 1218 | * |
| 1219 | * which we should reject. |
| 1220 | */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1221 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | set_access(unsigned int *access, unsigned long bmap) { |
| 1223 | int i; |
| 1224 | |
| 1225 | *access = 0; |
| 1226 | for (i = 1; i < 4; i++) { |
| 1227 | if (test_bit(i, &bmap)) |
| 1228 | *access |= i; |
| 1229 | } |
| 1230 | } |
| 1231 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1232 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | set_deny(unsigned int *deny, unsigned long bmap) { |
| 1234 | int i; |
| 1235 | |
| 1236 | *deny = 0; |
| 1237 | for (i = 0; i < 4; i++) { |
| 1238 | if (test_bit(i, &bmap)) |
| 1239 | *deny |= i ; |
| 1240 | } |
| 1241 | } |
| 1242 | |
| 1243 | static int |
| 1244 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { |
| 1245 | unsigned int access, deny; |
| 1246 | |
| 1247 | set_access(&access, stp->st_access_bmap); |
| 1248 | set_deny(&deny, stp->st_deny_bmap); |
| 1249 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
| 1250 | return 0; |
| 1251 | return 1; |
| 1252 | } |
| 1253 | |
| 1254 | /* |
| 1255 | * Called to check deny when READ with all zero stateid or |
| 1256 | * WRITE with all zero or all one stateid |
| 1257 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1258 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
| 1260 | { |
| 1261 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 1262 | struct nfs4_file *fp; |
| 1263 | struct nfs4_stateid *stp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1264 | __be32 ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | |
| 1266 | dprintk("NFSD: nfs4_share_conflict\n"); |
| 1267 | |
| 1268 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1269 | if (!fp) |
| 1270 | return nfs_ok; |
NeilBrown | b700949 | 2005-07-07 17:59:23 -0700 | [diff] [blame] | 1271 | ret = nfserr_locked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | /* Search for conflicting share reservations */ |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1273 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
| 1274 | if (test_bit(deny_type, &stp->st_deny_bmap) || |
| 1275 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) |
| 1276 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1278 | ret = nfs_ok; |
| 1279 | out: |
| 1280 | put_nfs4_file(fp); |
| 1281 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | } |
| 1283 | |
| 1284 | static inline void |
| 1285 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) |
| 1286 | { |
| 1287 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { |
Dave Hansen | aceaf78 | 2008-02-15 14:37:31 -0800 | [diff] [blame] | 1288 | drop_file_write_access(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
| 1290 | } |
| 1291 | } |
| 1292 | |
| 1293 | /* |
| 1294 | * Recall a delegation |
| 1295 | */ |
| 1296 | static int |
| 1297 | do_recall(void *__dp) |
| 1298 | { |
| 1299 | struct nfs4_delegation *dp = __dp; |
| 1300 | |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1301 | dp->dl_file->fi_had_conflict = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | nfsd4_cb_recall(dp); |
| 1303 | return 0; |
| 1304 | } |
| 1305 | |
| 1306 | /* |
| 1307 | * Spawn a thread to perform a recall on the delegation represented |
| 1308 | * by the lease (file_lock) |
| 1309 | * |
| 1310 | * Called from break_lease() with lock_kernel() held. |
| 1311 | * Note: we assume break_lease will only call this *once* for any given |
| 1312 | * lease. |
| 1313 | */ |
| 1314 | static |
| 1315 | void nfsd_break_deleg_cb(struct file_lock *fl) |
| 1316 | { |
| 1317 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; |
| 1318 | struct task_struct *t; |
| 1319 | |
| 1320 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); |
| 1321 | if (!dp) |
| 1322 | return; |
| 1323 | |
| 1324 | /* We're assuming the state code never drops its reference |
| 1325 | * without first removing the lease. Since we're in this lease |
| 1326 | * callback (and since the lease code is serialized by the kernel |
| 1327 | * lock) we know the server hasn't removed the lease yet, we know |
| 1328 | * it's safe to take a reference: */ |
| 1329 | atomic_inc(&dp->dl_count); |
J. Bruce Fields | cfdcad4 | 2007-09-12 20:35:15 -0400 | [diff] [blame] | 1330 | atomic_inc(&dp->dl_client->cl_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | |
| 1332 | spin_lock(&recall_lock); |
| 1333 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
| 1334 | spin_unlock(&recall_lock); |
| 1335 | |
| 1336 | /* only place dl_time is set. protected by lock_kernel*/ |
| 1337 | dp->dl_time = get_seconds(); |
| 1338 | |
J. Bruce Fields | 0272e1f | 2007-09-12 18:56:12 -0400 | [diff] [blame] | 1339 | /* |
| 1340 | * We don't want the locks code to timeout the lease for us; |
| 1341 | * we'll remove it ourself if the delegation isn't returned |
| 1342 | * in time. |
| 1343 | */ |
| 1344 | fl->fl_break_time = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
| 1346 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); |
| 1347 | if (IS_ERR(t)) { |
| 1348 | struct nfs4_client *clp = dp->dl_client; |
| 1349 | |
| 1350 | printk(KERN_INFO "NFSD: Callback thread failed for " |
| 1351 | "for client (clientid %08x/%08x)\n", |
| 1352 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
J. Bruce Fields | cfdcad4 | 2007-09-12 20:35:15 -0400 | [diff] [blame] | 1353 | put_nfs4_client(dp->dl_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | nfs4_put_delegation(dp); |
| 1355 | } |
| 1356 | } |
| 1357 | |
| 1358 | /* |
| 1359 | * The file_lock is being reapd. |
| 1360 | * |
| 1361 | * Called by locks_free_lock() with lock_kernel() held. |
| 1362 | */ |
| 1363 | static |
| 1364 | void nfsd_release_deleg_cb(struct file_lock *fl) |
| 1365 | { |
| 1366 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
| 1367 | |
| 1368 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); |
| 1369 | |
| 1370 | if (!(fl->fl_flags & FL_LEASE) || !dp) |
| 1371 | return; |
| 1372 | dp->dl_flock = NULL; |
| 1373 | } |
| 1374 | |
| 1375 | /* |
| 1376 | * Set the delegation file_lock back pointer. |
| 1377 | * |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 1378 | * Called from setlease() with lock_kernel() held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | */ |
| 1380 | static |
| 1381 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) |
| 1382 | { |
| 1383 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; |
| 1384 | |
| 1385 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); |
| 1386 | if (!dp) |
| 1387 | return; |
| 1388 | dp->dl_flock = new; |
| 1389 | } |
| 1390 | |
| 1391 | /* |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 1392 | * Called from setlease() with lock_kernel() held |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | */ |
| 1394 | static |
| 1395 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) |
| 1396 | { |
| 1397 | struct nfs4_delegation *onlistd = |
| 1398 | (struct nfs4_delegation *)onlist->fl_owner; |
| 1399 | struct nfs4_delegation *tryd = |
| 1400 | (struct nfs4_delegation *)try->fl_owner; |
| 1401 | |
| 1402 | if (onlist->fl_lmops != try->fl_lmops) |
| 1403 | return 0; |
| 1404 | |
| 1405 | return onlistd->dl_client == tryd->dl_client; |
| 1406 | } |
| 1407 | |
| 1408 | |
| 1409 | static |
| 1410 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) |
| 1411 | { |
| 1412 | if (arg & F_UNLCK) |
| 1413 | return lease_modify(onlist, arg); |
| 1414 | else |
| 1415 | return -EAGAIN; |
| 1416 | } |
| 1417 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1418 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | .fl_break = nfsd_break_deleg_cb, |
| 1420 | .fl_release_private = nfsd_release_deleg_cb, |
| 1421 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, |
| 1422 | .fl_mylease = nfsd_same_client_deleg_cb, |
| 1423 | .fl_change = nfsd_change_deleg_cb, |
| 1424 | }; |
| 1425 | |
| 1426 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1427 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | nfsd4_process_open1(struct nfsd4_open *open) |
| 1429 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | clientid_t *clientid = &open->op_clientid; |
| 1431 | struct nfs4_client *clp = NULL; |
| 1432 | unsigned int strhashval; |
| 1433 | struct nfs4_stateowner *sop = NULL; |
| 1434 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | if (!check_name(open->op_owner)) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1436 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | |
| 1438 | if (STALE_CLIENTID(&open->op_clientid)) |
| 1439 | return nfserr_stale_clientid; |
| 1440 | |
| 1441 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); |
| 1442 | sop = find_openstateowner_str(strhashval, open); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1443 | open->op_stateowner = sop; |
| 1444 | if (!sop) { |
| 1445 | /* Make sure the client's lease hasn't expired. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | clp = find_confirmed_client(clientid); |
| 1447 | if (clp == NULL) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1448 | return nfserr_expired; |
| 1449 | goto renew; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | } |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1451 | if (!sop->so_confirmed) { |
| 1452 | /* Replace unconfirmed owners without checking for replay. */ |
| 1453 | clp = sop->so_client; |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 1454 | release_openowner(sop); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1455 | open->op_stateowner = NULL; |
| 1456 | goto renew; |
| 1457 | } |
| 1458 | if (open->op_seqid == sop->so_seqid - 1) { |
| 1459 | if (sop->so_replay.rp_buflen) |
Al Viro | a90b061 | 2006-10-19 23:29:03 -0700 | [diff] [blame] | 1460 | return nfserr_replay_me; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1461 | /* The original OPEN failed so spectacularly |
| 1462 | * that we don't even have replay data saved! |
| 1463 | * Therefore, we have no choice but to continue |
| 1464 | * processing this OPEN; presumably, we'll |
| 1465 | * fail again for the same reason. |
| 1466 | */ |
| 1467 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); |
| 1468 | goto renew; |
| 1469 | } |
| 1470 | if (open->op_seqid != sop->so_seqid) |
| 1471 | return nfserr_bad_seqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | renew: |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1473 | if (open->op_stateowner == NULL) { |
| 1474 | sop = alloc_init_open_stateowner(strhashval, clp, open); |
| 1475 | if (sop == NULL) |
| 1476 | return nfserr_resource; |
| 1477 | open->op_stateowner = sop; |
| 1478 | } |
| 1479 | list_del_init(&sop->so_close_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | renew_client(sop->so_client); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1481 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | } |
| 1483 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1484 | static inline __be32 |
NeilBrown | 4a6e43e | 2005-06-23 22:02:50 -0700 | [diff] [blame] | 1485 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
| 1486 | { |
| 1487 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) |
| 1488 | return nfserr_openmode; |
| 1489 | else |
| 1490 | return nfs_ok; |
| 1491 | } |
| 1492 | |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 1493 | static struct nfs4_delegation * |
| 1494 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) |
| 1495 | { |
| 1496 | struct nfs4_delegation *dp; |
| 1497 | |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1498 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 1499 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
| 1500 | return dp; |
| 1501 | } |
| 1502 | return NULL; |
| 1503 | } |
| 1504 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1505 | static __be32 |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1506 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
| 1507 | struct nfs4_delegation **dp) |
| 1508 | { |
| 1509 | int flags; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1510 | __be32 status = nfserr_bad_stateid; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1511 | |
| 1512 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); |
| 1513 | if (*dp == NULL) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1514 | goto out; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1515 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
| 1516 | RD_STATE : WR_STATE; |
| 1517 | status = nfs4_check_delegmode(*dp, flags); |
| 1518 | if (status) |
| 1519 | *dp = NULL; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1520 | out: |
| 1521 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 1522 | return nfs_ok; |
| 1523 | if (status) |
| 1524 | return status; |
| 1525 | open->op_stateowner->so_confirmed = 1; |
| 1526 | return nfs_ok; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1527 | } |
| 1528 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1529 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
| 1531 | { |
| 1532 | struct nfs4_stateid *local; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1533 | __be32 status = nfserr_share_denied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 1535 | |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1536 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | /* ignore lock owners */ |
| 1538 | if (local->st_stateowner->so_is_open_owner == 0) |
| 1539 | continue; |
| 1540 | /* remember if we have seen this open owner */ |
| 1541 | if (local->st_stateowner == sop) |
| 1542 | *stpp = local; |
| 1543 | /* check for conflicting share reservations */ |
| 1544 | if (!test_share(local, open)) |
| 1545 | goto out; |
| 1546 | } |
| 1547 | status = 0; |
| 1548 | out: |
| 1549 | return status; |
| 1550 | } |
| 1551 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1552 | static inline struct nfs4_stateid * |
| 1553 | nfs4_alloc_stateid(void) |
| 1554 | { |
| 1555 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); |
| 1556 | } |
| 1557 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1558 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1560 | struct nfs4_delegation *dp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | struct svc_fh *cur_fh, int flags) |
| 1562 | { |
| 1563 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1565 | stp = nfs4_alloc_stateid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | if (stp == NULL) |
| 1567 | return nfserr_resource; |
| 1568 | |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1569 | if (dp) { |
| 1570 | get_file(dp->dl_vfs_file); |
| 1571 | stp->st_vfs_file = dp->dl_vfs_file; |
| 1572 | } else { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1573 | __be32 status; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1574 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
| 1575 | &stp->st_vfs_file); |
| 1576 | if (status) { |
| 1577 | if (status == nfserr_dropit) |
| 1578 | status = nfserr_jukebox; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1579 | kmem_cache_free(stateid_slab, stp); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1580 | return status; |
| 1581 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | *stpp = stp; |
| 1584 | return 0; |
| 1585 | } |
| 1586 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1587 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
| 1589 | struct nfsd4_open *open) |
| 1590 | { |
| 1591 | struct iattr iattr = { |
| 1592 | .ia_valid = ATTR_SIZE, |
| 1593 | .ia_size = 0, |
| 1594 | }; |
| 1595 | if (!open->op_truncate) |
| 1596 | return 0; |
| 1597 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
Al Viro | 9246585 | 2006-01-18 17:43:46 -0800 | [diff] [blame] | 1598 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
| 1600 | } |
| 1601 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1602 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
| 1604 | { |
| 1605 | struct file *filp = stp->st_vfs_file; |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 1606 | struct inode *inode = filp->f_path.dentry->d_inode; |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1607 | unsigned int share_access, new_writer; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1608 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | |
| 1610 | set_access(&share_access, stp->st_access_bmap); |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1611 | new_writer = (~share_access) & open->op_share_access |
| 1612 | & NFS4_SHARE_ACCESS_WRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1614 | if (new_writer) { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1615 | int err = get_write_access(inode); |
| 1616 | if (err) |
| 1617 | return nfserrno(err); |
Benny Halevy | e518f05 | 2008-07-04 15:38:41 +0300 | [diff] [blame] | 1618 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
| 1619 | if (err) |
| 1620 | return nfserrno(err); |
| 1621 | file_take_write(filp); |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1622 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | status = nfsd4_truncate(rqstp, cur_fh, open); |
| 1624 | if (status) { |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1625 | if (new_writer) |
| 1626 | put_write_access(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | return status; |
| 1628 | } |
| 1629 | /* remember the open */ |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1630 | filp->f_mode |= open->op_share_access; |
J. Bruce Fields | b55e0ba | 2008-04-28 18:22:50 -0400 | [diff] [blame] | 1631 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
| 1632 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | |
| 1634 | return nfs_ok; |
| 1635 | } |
| 1636 | |
| 1637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | static void |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 1639 | nfs4_set_claim_prev(struct nfsd4_open *open) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | { |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 1641 | open->op_stateowner->so_confirmed = 1; |
| 1642 | open->op_stateowner->so_client->cl_firststate = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | } |
| 1644 | |
| 1645 | /* |
| 1646 | * Attempt to hand out a delegation. |
| 1647 | */ |
| 1648 | static void |
| 1649 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) |
| 1650 | { |
| 1651 | struct nfs4_delegation *dp; |
| 1652 | struct nfs4_stateowner *sop = stp->st_stateowner; |
| 1653 | struct nfs4_callback *cb = &sop->so_client->cl_callback; |
| 1654 | struct file_lock fl, *flp = &fl; |
| 1655 | int status, flag = 0; |
| 1656 | |
| 1657 | flag = NFS4_OPEN_DELEGATE_NONE; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 1658 | open->op_recall = 0; |
| 1659 | switch (open->op_claim_type) { |
| 1660 | case NFS4_OPEN_CLAIM_PREVIOUS: |
| 1661 | if (!atomic_read(&cb->cb_set)) |
| 1662 | open->op_recall = 1; |
| 1663 | flag = open->op_delegate_type; |
| 1664 | if (flag == NFS4_OPEN_DELEGATE_NONE) |
| 1665 | goto out; |
| 1666 | break; |
| 1667 | case NFS4_OPEN_CLAIM_NULL: |
| 1668 | /* Let's not give out any delegations till everyone's |
| 1669 | * had the chance to reclaim theirs.... */ |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 1670 | if (locks_in_grace()) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 1671 | goto out; |
| 1672 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) |
| 1673 | goto out; |
| 1674 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 1675 | flag = NFS4_OPEN_DELEGATE_WRITE; |
| 1676 | else |
| 1677 | flag = NFS4_OPEN_DELEGATE_READ; |
| 1678 | break; |
| 1679 | default: |
| 1680 | goto out; |
| 1681 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | |
| 1683 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); |
| 1684 | if (dp == NULL) { |
| 1685 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 1686 | goto out; |
| 1687 | } |
| 1688 | locks_init_lock(&fl); |
| 1689 | fl.fl_lmops = &nfsd_lease_mng_ops; |
| 1690 | fl.fl_flags = FL_LEASE; |
Felix Blyakher | 9167f50 | 2008-02-26 10:54:36 -0800 | [diff] [blame] | 1691 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | fl.fl_end = OFFSET_MAX; |
| 1693 | fl.fl_owner = (fl_owner_t)dp; |
| 1694 | fl.fl_file = stp->st_vfs_file; |
| 1695 | fl.fl_pid = current->tgid; |
| 1696 | |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 1697 | /* vfs_setlease checks to see if delegation should be handed out. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | * the lock_manager callbacks fl_mylease and fl_change are used |
| 1699 | */ |
Felix Blyakher | 9167f50 | 2008-02-26 10:54:36 -0800 | [diff] [blame] | 1700 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
NeilBrown | c907132 | 2005-04-16 15:26:38 -0700 | [diff] [blame] | 1702 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 1704 | goto out; |
| 1705 | } |
| 1706 | |
| 1707 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); |
| 1708 | |
| 1709 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", |
| 1710 | dp->dl_stateid.si_boot, |
| 1711 | dp->dl_stateid.si_stateownerid, |
| 1712 | dp->dl_stateid.si_fileid, |
| 1713 | dp->dl_stateid.si_generation); |
| 1714 | out: |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 1715 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
| 1716 | && flag == NFS4_OPEN_DELEGATE_NONE |
| 1717 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 1718 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | open->op_delegate_type = flag; |
| 1720 | } |
| 1721 | |
| 1722 | /* |
| 1723 | * called with nfs4_lock_state() held. |
| 1724 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1725 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| 1727 | { |
| 1728 | struct nfs4_file *fp = NULL; |
| 1729 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 1730 | struct nfs4_stateid *stp = NULL; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1731 | struct nfs4_delegation *dp = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1732 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | |
| 1734 | status = nfserr_inval; |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1735 | if (!access_valid(open->op_share_access) |
| 1736 | || !deny_valid(open->op_share_deny)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | goto out; |
| 1738 | /* |
| 1739 | * Lookup file; if found, lookup stateid and check open request, |
| 1740 | * and check for delegations in the process of being recalled. |
| 1741 | * If not found, create the nfs4_file struct |
| 1742 | */ |
| 1743 | fp = find_file(ino); |
| 1744 | if (fp) { |
| 1745 | if ((status = nfs4_check_open(fp, open, &stp))) |
| 1746 | goto out; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1747 | status = nfs4_check_deleg(fp, open, &dp); |
| 1748 | if (status) |
| 1749 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | } else { |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1751 | status = nfserr_bad_stateid; |
| 1752 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 1753 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | status = nfserr_resource; |
| 1755 | fp = alloc_init_file(ino); |
| 1756 | if (fp == NULL) |
| 1757 | goto out; |
| 1758 | } |
| 1759 | |
| 1760 | /* |
| 1761 | * OPEN the file, or upgrade an existing OPEN. |
| 1762 | * If truncate fails, the OPEN fails. |
| 1763 | */ |
| 1764 | if (stp) { |
| 1765 | /* Stateid was found, this is an OPEN upgrade */ |
| 1766 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); |
| 1767 | if (status) |
| 1768 | goto out; |
NeilBrown | 444c2c0 | 2005-07-07 17:59:22 -0700 | [diff] [blame] | 1769 | update_stateid(&stp->st_stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | } else { |
| 1771 | /* Stateid was not found, this is a new OPEN */ |
| 1772 | int flags = 0; |
J. Bruce Fields | 9ecb6a0 | 2006-06-30 01:56:17 -0700 | [diff] [blame] | 1773 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 1774 | flags |= NFSD_MAY_READ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 1776 | flags |= NFSD_MAY_WRITE; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1777 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
| 1778 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | goto out; |
| 1780 | init_stateid(stp, fp, open); |
| 1781 | status = nfsd4_truncate(rqstp, current_fh, open); |
| 1782 | if (status) { |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 1783 | release_open_stateid(stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | goto out; |
| 1785 | } |
| 1786 | } |
| 1787 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 1788 | |
| 1789 | /* |
| 1790 | * Attempt to hand out a delegation. No error return, because the |
| 1791 | * OPEN succeeds even if we fail. |
| 1792 | */ |
| 1793 | nfs4_open_delegation(current_fh, open, stp); |
| 1794 | |
| 1795 | status = nfs_ok; |
| 1796 | |
| 1797 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", |
| 1798 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, |
| 1799 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); |
| 1800 | out: |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1801 | if (fp) |
| 1802 | put_nfs4_file(fp); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 1803 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
| 1804 | nfs4_set_claim_prev(open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | /* |
| 1806 | * To finish the open response, we just need to set the rflags. |
| 1807 | */ |
| 1808 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; |
| 1809 | if (!open->op_stateowner->so_confirmed) |
| 1810 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
| 1811 | |
| 1812 | return status; |
| 1813 | } |
| 1814 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1815 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 1816 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1817 | clientid_t *clid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | { |
| 1819 | struct nfs4_client *clp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1820 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | |
| 1822 | nfs4_lock_state(); |
| 1823 | dprintk("process_renew(%08x/%08x): starting\n", |
| 1824 | clid->cl_boot, clid->cl_id); |
| 1825 | status = nfserr_stale_clientid; |
| 1826 | if (STALE_CLIENTID(clid)) |
| 1827 | goto out; |
| 1828 | clp = find_confirmed_client(clid); |
| 1829 | status = nfserr_expired; |
| 1830 | if (clp == NULL) { |
| 1831 | /* We assume the client took too long to RENEW. */ |
| 1832 | dprintk("nfsd4_renew: clientid not found!\n"); |
| 1833 | goto out; |
| 1834 | } |
| 1835 | renew_client(clp); |
| 1836 | status = nfserr_cb_path_down; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1837 | if (!list_empty(&clp->cl_delegations) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | && !atomic_read(&clp->cl_callback.cb_set)) |
| 1839 | goto out; |
| 1840 | status = nfs_ok; |
| 1841 | out: |
| 1842 | nfs4_unlock_state(); |
| 1843 | return status; |
| 1844 | } |
| 1845 | |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 1846 | struct lock_manager nfsd4_manager = { |
| 1847 | }; |
| 1848 | |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 1849 | static void |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 1850 | nfsd4_end_grace(void) |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 1851 | { |
| 1852 | dprintk("NFSD: end of grace period\n"); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 1853 | nfsd4_recdir_purge_old(); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 1854 | locks_end_grace(&nfsd4_manager); |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 1855 | } |
| 1856 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1857 | static time_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | nfs4_laundromat(void) |
| 1859 | { |
| 1860 | struct nfs4_client *clp; |
| 1861 | struct nfs4_stateowner *sop; |
| 1862 | struct nfs4_delegation *dp; |
| 1863 | struct list_head *pos, *next, reaplist; |
| 1864 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; |
| 1865 | time_t t, clientid_val = NFSD_LEASE_TIME; |
| 1866 | time_t u, test_val = NFSD_LEASE_TIME; |
| 1867 | |
| 1868 | nfs4_lock_state(); |
| 1869 | |
| 1870 | dprintk("NFSD: laundromat service - starting\n"); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 1871 | if (locks_in_grace()) |
| 1872 | nfsd4_end_grace(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | list_for_each_safe(pos, next, &client_lru) { |
| 1874 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
| 1875 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { |
| 1876 | t = clp->cl_time - cutoff; |
| 1877 | if (clientid_val > t) |
| 1878 | clientid_val = t; |
| 1879 | break; |
| 1880 | } |
| 1881 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
| 1882 | clp->cl_clientid.cl_id); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 1883 | nfsd4_remove_clid_dir(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | expire_client(clp); |
| 1885 | } |
| 1886 | INIT_LIST_HEAD(&reaplist); |
| 1887 | spin_lock(&recall_lock); |
| 1888 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 1889 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 1890 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
| 1891 | u = dp->dl_time - cutoff; |
| 1892 | if (test_val > u) |
| 1893 | test_val = u; |
| 1894 | break; |
| 1895 | } |
| 1896 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", |
| 1897 | dp, dp->dl_flock); |
| 1898 | list_move(&dp->dl_recall_lru, &reaplist); |
| 1899 | } |
| 1900 | spin_unlock(&recall_lock); |
| 1901 | list_for_each_safe(pos, next, &reaplist) { |
| 1902 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 1903 | list_del_init(&dp->dl_recall_lru); |
| 1904 | unhash_delegation(dp); |
| 1905 | } |
| 1906 | test_val = NFSD_LEASE_TIME; |
| 1907 | list_for_each_safe(pos, next, &close_lru) { |
| 1908 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); |
| 1909 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { |
| 1910 | u = sop->so_time - cutoff; |
| 1911 | if (test_val > u) |
| 1912 | test_val = u; |
| 1913 | break; |
| 1914 | } |
| 1915 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", |
| 1916 | sop->so_id); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 1917 | release_openowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | } |
| 1919 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) |
| 1920 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; |
| 1921 | nfs4_unlock_state(); |
| 1922 | return clientid_val; |
| 1923 | } |
| 1924 | |
Harvey Harrison | a254b24 | 2008-02-20 12:49:00 -0800 | [diff] [blame] | 1925 | static struct workqueue_struct *laundry_wq; |
| 1926 | static void laundromat_main(struct work_struct *); |
| 1927 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); |
| 1928 | |
| 1929 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1930 | laundromat_main(struct work_struct *not_used) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | { |
| 1932 | time_t t; |
| 1933 | |
| 1934 | t = nfs4_laundromat(); |
| 1935 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 1936 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | } |
| 1938 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1939 | static struct nfs4_stateowner * |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 1940 | search_close_lru(u32 st_id, int flags) |
| 1941 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | struct nfs4_stateowner *local = NULL; |
| 1943 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | if (flags & CLOSE_STATE) { |
| 1945 | list_for_each_entry(local, &close_lru, so_close_lru) { |
| 1946 | if (local->so_id == st_id) |
| 1947 | return local; |
| 1948 | } |
| 1949 | } |
| 1950 | return NULL; |
| 1951 | } |
| 1952 | |
| 1953 | static inline int |
| 1954 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) |
| 1955 | { |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 1956 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | } |
| 1958 | |
| 1959 | static int |
| 1960 | STALE_STATEID(stateid_t *stateid) |
| 1961 | { |
| 1962 | if (stateid->si_boot == boot_time) |
| 1963 | return 0; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 1964 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
| 1966 | stateid->si_generation); |
| 1967 | return 1; |
| 1968 | } |
| 1969 | |
| 1970 | static inline int |
| 1971 | access_permit_read(unsigned long access_bmap) |
| 1972 | { |
| 1973 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || |
| 1974 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || |
| 1975 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); |
| 1976 | } |
| 1977 | |
| 1978 | static inline int |
| 1979 | access_permit_write(unsigned long access_bmap) |
| 1980 | { |
| 1981 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || |
| 1982 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); |
| 1983 | } |
| 1984 | |
| 1985 | static |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1986 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1988 | __be32 status = nfserr_openmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | |
| 1990 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
| 1991 | goto out; |
| 1992 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) |
| 1993 | goto out; |
| 1994 | status = nfs_ok; |
| 1995 | out: |
| 1996 | return status; |
| 1997 | } |
| 1998 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1999 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
| 2001 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2002 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | return nfs_ok; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2004 | else if (locks_in_grace()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | /* Answer in remaining cases depends on existance of |
| 2006 | * conflicting state; so we must wait out the grace period. */ |
| 2007 | return nfserr_grace; |
| 2008 | } else if (flags & WR_STATE) |
| 2009 | return nfs4_share_conflict(current_fh, |
| 2010 | NFS4_SHARE_DENY_WRITE); |
| 2011 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ |
| 2012 | return nfs4_share_conflict(current_fh, |
| 2013 | NFS4_SHARE_DENY_READ); |
| 2014 | } |
| 2015 | |
| 2016 | /* |
| 2017 | * Allow READ/WRITE during grace period on recovered state only for files |
| 2018 | * that are not able to provide mandatory locking. |
| 2019 | */ |
| 2020 | static inline int |
J. Bruce Fields | 18f8273 | 2009-02-21 15:23:01 -0800 | [diff] [blame] | 2021 | grace_disallows_io(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2022 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2023 | return locks_in_grace() && mandatory_lock(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | } |
| 2025 | |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2026 | static int check_stateid_generation(stateid_t *in, stateid_t *ref) |
| 2027 | { |
| 2028 | /* If the client sends us a stateid from the future, it's buggy: */ |
| 2029 | if (in->si_generation > ref->si_generation) |
| 2030 | return nfserr_bad_stateid; |
| 2031 | /* |
| 2032 | * The following, however, can happen. For example, if the |
| 2033 | * client sends an open and some IO at the same time, the open |
| 2034 | * may bump si_generation while the IO is still in flight. |
| 2035 | * Thanks to hard links and renames, the client never knows what |
| 2036 | * file an open will affect. So it could avoid that situation |
| 2037 | * only by serializing all opens and IO from the same open |
| 2038 | * owner. To recover from the old_stateid error, the client |
| 2039 | * will just have to retry the IO: |
| 2040 | */ |
| 2041 | if (in->si_generation < ref->si_generation) |
| 2042 | return nfserr_old_stateid; |
| 2043 | return nfs_ok; |
| 2044 | } |
| 2045 | |
J. Bruce Fields | 3e63307 | 2009-02-21 13:17:19 -0800 | [diff] [blame] | 2046 | static int is_delegation_stateid(stateid_t *stateid) |
| 2047 | { |
| 2048 | return stateid->si_fileid == 0; |
| 2049 | } |
| 2050 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2051 | /* |
| 2052 | * Checks for stateid operations |
| 2053 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2054 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
| 2056 | { |
| 2057 | struct nfs4_stateid *stp = NULL; |
| 2058 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | struct inode *ino = current_fh->fh_dentry->d_inode; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2060 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2062 | if (filpp) |
| 2063 | *filpp = NULL; |
| 2064 | |
J. Bruce Fields | 18f8273 | 2009-02-21 15:23:01 -0800 | [diff] [blame] | 2065 | if (grace_disallows_io(ino)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | return nfserr_grace; |
| 2067 | |
| 2068 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 2069 | return check_special_stateids(current_fh, stateid, flags); |
| 2070 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | status = nfserr_stale_stateid; |
| 2072 | if (STALE_STATEID(stateid)) |
| 2073 | goto out; |
| 2074 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | status = nfserr_bad_stateid; |
J. Bruce Fields | 3e63307 | 2009-02-21 13:17:19 -0800 | [diff] [blame] | 2076 | if (is_delegation_stateid(stateid)) { |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2077 | dp = find_delegation_stateid(ino, stateid); |
J. Bruce Fields | 819a8f5 | 2009-02-21 12:13:24 -0800 | [diff] [blame] | 2078 | if (!dp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | goto out; |
J. Bruce Fields | fd03b09 | 2009-02-21 11:27:30 -0800 | [diff] [blame] | 2080 | status = check_stateid_generation(stateid, &dp->dl_stateid); |
J. Bruce Fields | 0c2a498 | 2009-02-21 11:11:50 -0800 | [diff] [blame] | 2081 | if (status) |
| 2082 | goto out; |
J. Bruce Fields | dc9bf70 | 2009-02-21 11:14:43 -0800 | [diff] [blame] | 2083 | status = nfs4_check_delegmode(dp, flags); |
| 2084 | if (status) |
| 2085 | goto out; |
| 2086 | renew_client(dp->dl_client); |
J. Bruce Fields | dc9bf70 | 2009-02-21 11:14:43 -0800 | [diff] [blame] | 2087 | if (filpp) |
| 2088 | *filpp = dp->dl_vfs_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | } else { /* open or lock stateid */ |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2090 | stp = find_stateid(stateid, flags); |
J. Bruce Fields | 819a8f5 | 2009-02-21 12:13:24 -0800 | [diff] [blame] | 2091 | if (!stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2092 | goto out; |
J. Bruce Fields | 6150ef0 | 2009-02-21 13:36:16 -0800 | [diff] [blame] | 2093 | if (nfs4_check_fh(current_fh, stp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | goto out; |
| 2095 | if (!stp->st_stateowner->so_confirmed) |
| 2096 | goto out; |
J. Bruce Fields | fd03b09 | 2009-02-21 11:27:30 -0800 | [diff] [blame] | 2097 | status = check_stateid_generation(stateid, &stp->st_stateid); |
J. Bruce Fields | 0c2a498 | 2009-02-21 11:11:50 -0800 | [diff] [blame] | 2098 | if (status) |
| 2099 | goto out; |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2100 | status = nfs4_check_openmode(stp, flags); |
| 2101 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | goto out; |
| 2103 | renew_client(stp->st_stateowner->so_client); |
| 2104 | if (filpp) |
| 2105 | *filpp = stp->st_vfs_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | } |
| 2107 | status = nfs_ok; |
| 2108 | out: |
| 2109 | return status; |
| 2110 | } |
| 2111 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2112 | static inline int |
| 2113 | setlkflg (int type) |
| 2114 | { |
| 2115 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? |
| 2116 | RD_STATE : WR_STATE; |
| 2117 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | |
| 2119 | /* |
| 2120 | * Checks for sequence id mutating operations. |
| 2121 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2122 | static __be32 |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2123 | nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, struct nfsd4_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | struct nfs4_stateid *stp; |
| 2126 | struct nfs4_stateowner *sop; |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2127 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | |
| 2129 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " |
| 2130 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, |
| 2131 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
| 2132 | stateid->si_generation); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2134 | *stpp = NULL; |
| 2135 | *sopp = NULL; |
| 2136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2138 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2139 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2140 | } |
| 2141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | if (STALE_STATEID(stateid)) |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2143 | return nfserr_stale_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | /* |
| 2145 | * We return BAD_STATEID if filehandle doesn't match stateid, |
| 2146 | * the confirmed flag is incorrecly set, or the generation |
| 2147 | * number is incorrect. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | */ |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 2149 | stp = find_stateid(stateid, flags); |
| 2150 | if (stp == NULL) { |
| 2151 | /* |
| 2152 | * Also, we should make sure this isn't just the result of |
| 2153 | * a replayed close: |
| 2154 | */ |
| 2155 | sop = search_close_lru(stateid->si_stateownerid, flags); |
| 2156 | if (sop == NULL) |
| 2157 | return nfserr_bad_stateid; |
| 2158 | *sopp = sop; |
| 2159 | goto check_replay; |
| 2160 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | |
J. Bruce Fields | 39325bd | 2007-11-26 17:06:39 -0500 | [diff] [blame] | 2162 | *stpp = stp; |
| 2163 | *sopp = sop = stp->st_stateowner; |
| 2164 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2165 | if (lock) { |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2166 | clientid_t *lockclid = &lock->v.new.clientid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | struct nfs4_client *clp = sop->so_client; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2168 | int lkflg = 0; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2169 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2171 | lkflg = setlkflg(lock->lk_type); |
| 2172 | |
| 2173 | if (lock->lk_is_new) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2174 | if (!sop->so_is_open_owner) |
| 2175 | return nfserr_bad_stateid; |
| 2176 | if (!same_clid(&clp->cl_clientid, lockclid)) |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2177 | return nfserr_bad_stateid; |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2178 | /* stp is the open stateid */ |
| 2179 | status = nfs4_check_openmode(stp, lkflg); |
| 2180 | if (status) |
| 2181 | return status; |
| 2182 | } else { |
| 2183 | /* stp is the lock stateid */ |
| 2184 | status = nfs4_check_openmode(stp->st_openstp, lkflg); |
| 2185 | if (status) |
| 2186 | return status; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2187 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2188 | } |
| 2189 | |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2190 | if (nfs4_check_fh(current_fh, stp)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2191 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2192 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | } |
| 2194 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | /* |
| 2196 | * We now validate the seqid and stateid generation numbers. |
| 2197 | * For the moment, we ignore the possibility of |
| 2198 | * generation number wraparound. |
| 2199 | */ |
NeilBrown | bd9aac5 | 2005-07-07 17:59:19 -0700 | [diff] [blame] | 2200 | if (seqid != sop->so_seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | goto check_replay; |
| 2202 | |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2203 | if (sop->so_confirmed && flags & CONFIRM) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2204 | dprintk("NFSD: preprocess_seqid_op: expected" |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2205 | " unconfirmed stateowner!\n"); |
| 2206 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2207 | } |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2208 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2209 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2210 | " confirmed yet!\n"); |
| 2211 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2212 | } |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2213 | status = check_stateid_generation(stateid, &stp->st_stateid); |
| 2214 | if (status) |
| 2215 | return status; |
NeilBrown | 52fd004 | 2005-07-07 17:59:24 -0700 | [diff] [blame] | 2216 | renew_client(sop->so_client); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2217 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | check_replay: |
NeilBrown | bd9aac5 | 2005-07-07 17:59:19 -0700 | [diff] [blame] | 2220 | if (seqid == sop->so_seqid - 1) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2221 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | /* indicate replay to calling function */ |
Al Viro | a90b061 | 2006-10-19 23:29:03 -0700 | [diff] [blame] | 2223 | return nfserr_replay_me; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2224 | } |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2225 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2226 | sop->so_seqid, seqid); |
| 2227 | *sopp = NULL; |
| 2228 | return nfserr_bad_seqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | } |
| 2230 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2231 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2232 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2233 | struct nfsd4_open_confirm *oc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2235 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | struct nfs4_stateowner *sop; |
| 2237 | struct nfs4_stateid *stp; |
| 2238 | |
| 2239 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2240 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 2241 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2243 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
J. Bruce Fields | a8cddc5 | 2006-06-30 01:56:13 -0700 | [diff] [blame] | 2244 | if (status) |
| 2245 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2246 | |
| 2247 | nfs4_lock_state(); |
| 2248 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2249 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
| 2250 | oc->oc_seqid, &oc->oc_req_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2251 | CONFIRM | OPEN_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | &oc->oc_stateowner, &stp, NULL))) |
| 2253 | goto out; |
| 2254 | |
| 2255 | sop = oc->oc_stateowner; |
| 2256 | sop->so_confirmed = 1; |
| 2257 | update_stateid(&stp->st_stateid); |
| 2258 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2259 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " |
| 2260 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, |
| 2261 | stp->st_stateid.si_boot, |
| 2262 | stp->st_stateid.si_stateownerid, |
| 2263 | stp->st_stateid.si_fileid, |
| 2264 | stp->st_stateid.si_generation); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 2265 | |
| 2266 | nfsd4_create_clid_dir(sop->so_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2268 | if (oc->oc_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | nfs4_get_stateowner(oc->oc_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2270 | cstate->replay_owner = oc->oc_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2271 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | nfs4_unlock_state(); |
| 2273 | return status; |
| 2274 | } |
| 2275 | |
| 2276 | |
| 2277 | /* |
| 2278 | * unset all bits in union bitmap (bmap) that |
| 2279 | * do not exist in share (from successful OPEN_DOWNGRADE) |
| 2280 | */ |
| 2281 | static void |
| 2282 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) |
| 2283 | { |
| 2284 | int i; |
| 2285 | for (i = 1; i < 4; i++) { |
| 2286 | if ((i & access) != i) |
| 2287 | __clear_bit(i, bmap); |
| 2288 | } |
| 2289 | } |
| 2290 | |
| 2291 | static void |
| 2292 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) |
| 2293 | { |
| 2294 | int i; |
| 2295 | for (i = 0; i < 4; i++) { |
| 2296 | if ((i & deny) != i) |
| 2297 | __clear_bit(i, bmap); |
| 2298 | } |
| 2299 | } |
| 2300 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2301 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2302 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
| 2303 | struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2304 | struct nfsd4_open_downgrade *od) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2305 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2306 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | struct nfs4_stateid *stp; |
| 2308 | unsigned int share_access; |
| 2309 | |
| 2310 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2311 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 2312 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2313 | |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 2314 | if (!access_valid(od->od_share_access) |
| 2315 | || !deny_valid(od->od_share_deny)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2316 | return nfserr_inval; |
| 2317 | |
| 2318 | nfs4_lock_state(); |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2319 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
| 2320 | od->od_seqid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | &od->od_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2322 | OPEN_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | &od->od_stateowner, &stp, NULL))) |
| 2324 | goto out; |
| 2325 | |
| 2326 | status = nfserr_inval; |
| 2327 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { |
| 2328 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", |
| 2329 | stp->st_access_bmap, od->od_share_access); |
| 2330 | goto out; |
| 2331 | } |
| 2332 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { |
| 2333 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
| 2334 | stp->st_deny_bmap, od->od_share_deny); |
| 2335 | goto out; |
| 2336 | } |
| 2337 | set_access(&share_access, stp->st_access_bmap); |
| 2338 | nfs4_file_downgrade(stp->st_vfs_file, |
| 2339 | share_access & ~od->od_share_access); |
| 2340 | |
| 2341 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); |
| 2342 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
| 2343 | |
| 2344 | update_stateid(&stp->st_stateid); |
| 2345 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2346 | status = nfs_ok; |
| 2347 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2348 | if (od->od_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2349 | nfs4_get_stateowner(od->od_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2350 | cstate->replay_owner = od->od_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2351 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2352 | nfs4_unlock_state(); |
| 2353 | return status; |
| 2354 | } |
| 2355 | |
| 2356 | /* |
| 2357 | * nfs4_unlock_state() called after encode |
| 2358 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2359 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2360 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2361 | struct nfsd4_close *close) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2363 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | struct nfs4_stateid *stp; |
| 2365 | |
| 2366 | dprintk("NFSD: nfsd4_close on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2367 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 2368 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2369 | |
| 2370 | nfs4_lock_state(); |
| 2371 | /* check close_lru for replay */ |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2372 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
| 2373 | close->cl_seqid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | &close->cl_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2375 | OPEN_STATE | CLOSE_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2376 | &close->cl_stateowner, &stp, NULL))) |
| 2377 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2378 | status = nfs_ok; |
| 2379 | update_stateid(&stp->st_stateid); |
| 2380 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2381 | |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 2382 | /* release_stateid() calls nfsd_close() if needed */ |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 2383 | release_open_stateid(stp); |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 2384 | |
| 2385 | /* place unused nfs4_stateowners on so_close_lru list to be |
| 2386 | * released by the laundromat service after the lease period |
| 2387 | * to enable us to handle CLOSE replay |
| 2388 | */ |
| 2389 | if (list_empty(&close->cl_stateowner->so_stateids)) |
| 2390 | move_to_close_lru(close->cl_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2392 | if (close->cl_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2393 | nfs4_get_stateowner(close->cl_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2394 | cstate->replay_owner = close->cl_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2395 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2396 | nfs4_unlock_state(); |
| 2397 | return status; |
| 2398 | } |
| 2399 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2400 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2401 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 2402 | struct nfsd4_delegreturn *dr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2403 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2404 | struct nfs4_delegation *dp; |
| 2405 | stateid_t *stateid = &dr->dr_stateid; |
| 2406 | struct inode *inode; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2407 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2409 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2410 | return status; |
| 2411 | inode = cstate->current_fh.fh_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2412 | |
| 2413 | nfs4_lock_state(); |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2414 | status = nfserr_bad_stateid; |
| 2415 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 2416 | goto out; |
| 2417 | status = nfserr_stale_stateid; |
| 2418 | if (STALE_STATEID(stateid)) |
| 2419 | goto out; |
J. Bruce Fields | 7e0f7cf | 2009-02-21 13:32:28 -0800 | [diff] [blame] | 2420 | status = nfserr_bad_stateid; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2421 | if (!is_delegation_stateid(stateid)) |
| 2422 | goto out; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2423 | dp = find_delegation_stateid(inode, stateid); |
| 2424 | if (!dp) |
| 2425 | goto out; |
| 2426 | status = check_stateid_generation(stateid, &dp->dl_stateid); |
| 2427 | if (status) |
| 2428 | goto out; |
| 2429 | renew_client(dp->dl_client); |
| 2430 | |
| 2431 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | out: |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2433 | nfs4_unlock_state(); |
| 2434 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | return status; |
| 2436 | } |
| 2437 | |
| 2438 | |
| 2439 | /* |
| 2440 | * Lock owner state (byte-range locks) |
| 2441 | */ |
| 2442 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
| 2443 | #define LOCK_HASH_BITS 8 |
| 2444 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) |
| 2445 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) |
| 2446 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2447 | static inline u64 |
| 2448 | end_offset(u64 start, u64 len) |
| 2449 | { |
| 2450 | u64 end; |
| 2451 | |
| 2452 | end = start + len; |
| 2453 | return end >= start ? end: NFS4_MAX_UINT64; |
| 2454 | } |
| 2455 | |
| 2456 | /* last octet in a range */ |
| 2457 | static inline u64 |
| 2458 | last_byte_offset(u64 start, u64 len) |
| 2459 | { |
| 2460 | u64 end; |
| 2461 | |
| 2462 | BUG_ON(!len); |
| 2463 | end = start + len; |
| 2464 | return end > start ? end - 1: NFS4_MAX_UINT64; |
| 2465 | } |
| 2466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2467 | #define lockownerid_hashval(id) \ |
| 2468 | ((id) & LOCK_HASH_MASK) |
| 2469 | |
| 2470 | static inline unsigned int |
| 2471 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, |
| 2472 | struct xdr_netobj *ownername) |
| 2473 | { |
| 2474 | return (file_hashval(inode) + cl_id |
| 2475 | + opaque_hashval(ownername->data, ownername->len)) |
| 2476 | & LOCK_HASH_MASK; |
| 2477 | } |
| 2478 | |
| 2479 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; |
| 2480 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; |
| 2481 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; |
| 2482 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2483 | static struct nfs4_stateid * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2484 | find_stateid(stateid_t *stid, int flags) |
| 2485 | { |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 2486 | struct nfs4_stateid *local; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | u32 st_id = stid->si_stateownerid; |
| 2488 | u32 f_id = stid->si_fileid; |
| 2489 | unsigned int hashval; |
| 2490 | |
| 2491 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 2492 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2493 | hashval = stateid_hashval(st_id, f_id); |
| 2494 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { |
| 2495 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 2496 | (local->st_stateid.si_fileid == f_id)) |
| 2497 | return local; |
| 2498 | } |
| 2499 | } |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 2500 | |
| 2501 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2502 | hashval = stateid_hashval(st_id, f_id); |
| 2503 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { |
| 2504 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 2505 | (local->st_stateid.si_fileid == f_id)) |
| 2506 | return local; |
| 2507 | } |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2508 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | return NULL; |
| 2510 | } |
| 2511 | |
| 2512 | static struct nfs4_delegation * |
| 2513 | find_delegation_stateid(struct inode *ino, stateid_t *stid) |
| 2514 | { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2515 | struct nfs4_file *fp; |
| 2516 | struct nfs4_delegation *dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2517 | |
| 2518 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", |
| 2519 | stid->si_boot, stid->si_stateownerid, |
| 2520 | stid->si_fileid, stid->si_generation); |
| 2521 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2523 | if (!fp) |
| 2524 | return NULL; |
| 2525 | dl = find_delegation_file(fp, stid); |
| 2526 | put_nfs4_file(fp); |
| 2527 | return dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2528 | } |
| 2529 | |
| 2530 | /* |
| 2531 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that |
| 2532 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th |
| 2533 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit |
| 2534 | * locking, this prevents us from being completely protocol-compliant. The |
| 2535 | * real solution to this problem is to start using unsigned file offsets in |
| 2536 | * the VFS, but this is a very deep change! |
| 2537 | */ |
| 2538 | static inline void |
| 2539 | nfs4_transform_lock_offset(struct file_lock *lock) |
| 2540 | { |
| 2541 | if (lock->fl_start < 0) |
| 2542 | lock->fl_start = OFFSET_MAX; |
| 2543 | if (lock->fl_end < 0) |
| 2544 | lock->fl_end = OFFSET_MAX; |
| 2545 | } |
| 2546 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2547 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
| 2548 | * as a unique cookie to identify our (NFSv4's) posix locks. */ |
Adrian Bunk | e465a77 | 2006-04-10 22:55:23 -0700 | [diff] [blame] | 2549 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2550 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2551 | |
| 2552 | static inline void |
| 2553 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) |
| 2554 | { |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2555 | struct nfs4_stateowner *sop; |
| 2556 | unsigned int hval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2558 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
| 2559 | sop = (struct nfs4_stateowner *) fl->fl_owner; |
| 2560 | hval = lockownerid_hashval(sop->so_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2561 | kref_get(&sop->so_ref); |
| 2562 | deny->ld_sop = sop; |
| 2563 | deny->ld_clientid = sop->so_client->cl_clientid; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2564 | } else { |
| 2565 | deny->ld_sop = NULL; |
| 2566 | deny->ld_clientid.cl_boot = 0; |
| 2567 | deny->ld_clientid.cl_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2568 | } |
| 2569 | deny->ld_start = fl->fl_start; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2570 | deny->ld_length = NFS4_MAX_UINT64; |
| 2571 | if (fl->fl_end != NFS4_MAX_UINT64) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
| 2573 | deny->ld_type = NFS4_READ_LT; |
| 2574 | if (fl->fl_type != F_RDLCK) |
| 2575 | deny->ld_type = NFS4_WRITE_LT; |
| 2576 | } |
| 2577 | |
| 2578 | static struct nfs4_stateowner * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, |
| 2580 | struct xdr_netobj *owner) |
| 2581 | { |
| 2582 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); |
| 2583 | struct nfs4_stateowner *op; |
| 2584 | |
| 2585 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2586 | if (same_owner_str(op, owner, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | return op; |
| 2588 | } |
| 2589 | return NULL; |
| 2590 | } |
| 2591 | |
| 2592 | /* |
| 2593 | * Alloc a lock owner structure. |
| 2594 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has |
| 2595 | * occured. |
| 2596 | * |
| 2597 | * strhashval = lock_ownerstr_hashval |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | */ |
| 2599 | |
| 2600 | static struct nfs4_stateowner * |
| 2601 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { |
| 2602 | struct nfs4_stateowner *sop; |
| 2603 | struct nfs4_replay *rp; |
| 2604 | unsigned int idhashval; |
| 2605 | |
| 2606 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) |
| 2607 | return NULL; |
| 2608 | idhashval = lockownerid_hashval(current_ownerid); |
| 2609 | INIT_LIST_HEAD(&sop->so_idhash); |
| 2610 | INIT_LIST_HEAD(&sop->so_strhash); |
| 2611 | INIT_LIST_HEAD(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2612 | INIT_LIST_HEAD(&sop->so_stateids); |
| 2613 | INIT_LIST_HEAD(&sop->so_perstateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2614 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
| 2615 | sop->so_time = 0; |
| 2616 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); |
| 2617 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2618 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | sop->so_is_open_owner = 0; |
| 2620 | sop->so_id = current_ownerid++; |
| 2621 | sop->so_client = clp; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2622 | /* It is the openowner seqid that will be incremented in encode in the |
| 2623 | * case of new lockowners; so increment the lock seqid manually: */ |
| 2624 | sop->so_seqid = lock->lk_new_lock_seqid + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2625 | sop->so_confirmed = 1; |
| 2626 | rp = &sop->so_replay; |
Al Viro | de1ae28 | 2006-01-18 17:43:47 -0800 | [diff] [blame] | 2627 | rp->rp_status = nfserr_serverfault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2628 | rp->rp_buflen = 0; |
| 2629 | rp->rp_buf = rp->rp_ibuf; |
| 2630 | return sop; |
| 2631 | } |
| 2632 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2633 | static struct nfs4_stateid * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2634 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
| 2635 | { |
| 2636 | struct nfs4_stateid *stp; |
| 2637 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 2638 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2639 | stp = nfs4_alloc_stateid(); |
| 2640 | if (stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2641 | goto out; |
| 2642 | INIT_LIST_HEAD(&stp->st_hash); |
| 2643 | INIT_LIST_HEAD(&stp->st_perfile); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2644 | INIT_LIST_HEAD(&stp->st_perstateowner); |
| 2645 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2646 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 2647 | list_add(&stp->st_perfile, &fp->fi_stateids); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2648 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2649 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2650 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2651 | stp->st_file = fp; |
| 2652 | stp->st_stateid.si_boot = boot_time; |
| 2653 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 2654 | stp->st_stateid.si_fileid = fp->fi_id; |
| 2655 | stp->st_stateid.si_generation = 0; |
| 2656 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ |
| 2657 | stp->st_access_bmap = open_stp->st_access_bmap; |
| 2658 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2659 | stp->st_openstp = open_stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2660 | |
| 2661 | out: |
| 2662 | return stp; |
| 2663 | } |
| 2664 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2665 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2666 | check_lock_length(u64 offset, u64 length) |
| 2667 | { |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2668 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | LOFF_OVERFLOW(offset, length))); |
| 2670 | } |
| 2671 | |
| 2672 | /* |
| 2673 | * LOCK operation |
| 2674 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2675 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2676 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2677 | struct nfsd4_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2678 | { |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 2679 | struct nfs4_stateowner *open_sop = NULL; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2680 | struct nfs4_stateowner *lock_sop = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2681 | struct nfs4_stateid *lock_stp; |
| 2682 | struct file *filp; |
| 2683 | struct file_lock file_lock; |
Andy Adamson | 8dc7c31 | 2006-03-20 13:44:26 -0500 | [diff] [blame] | 2684 | struct file_lock conflock; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2685 | __be32 status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | unsigned int strhashval; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 2687 | unsigned int cmd; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2688 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | |
| 2690 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", |
| 2691 | (long long) lock->lk_offset, |
| 2692 | (long long) lock->lk_length); |
| 2693 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
| 2695 | return nfserr_inval; |
| 2696 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2697 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 2698 | S_IFREG, NFSD_MAY_LOCK))) { |
Andy Adamson | a6f6ef2 | 2006-01-18 17:43:17 -0800 | [diff] [blame] | 2699 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
| 2700 | return status; |
| 2701 | } |
| 2702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | nfs4_lock_state(); |
| 2704 | |
| 2705 | if (lock->lk_is_new) { |
NeilBrown | 893f877 | 2005-07-07 17:59:17 -0700 | [diff] [blame] | 2706 | /* |
| 2707 | * Client indicates that this is a new lockowner. |
| 2708 | * Use open owner and open stateid to create lock owner and |
| 2709 | * lock stateid. |
| 2710 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2711 | struct nfs4_stateid *open_stp = NULL; |
| 2712 | struct nfs4_file *fp; |
| 2713 | |
| 2714 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2715 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2716 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2717 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2718 | /* validate and update open stateid and open seqid */ |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2719 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2720 | lock->lk_new_open_seqid, |
| 2721 | &lock->lk_new_open_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2722 | OPEN_STATE, |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2723 | &lock->lk_replay_owner, &open_stp, |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2724 | lock); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 2725 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | goto out; |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2727 | open_sop = lock->lk_replay_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2728 | /* create lockowner and lock stateid */ |
| 2729 | fp = open_stp->st_file; |
| 2730 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
| 2731 | open_sop->so_client->cl_clientid.cl_id, |
| 2732 | &lock->v.new.owner); |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 2733 | /* XXX: Do we need to check for duplicate stateowners on |
| 2734 | * the same file, or should they just be allowed (and |
| 2735 | * create new stateids)? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2736 | status = nfserr_resource; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2737 | lock_sop = alloc_init_lock_stateowner(strhashval, |
| 2738 | open_sop->so_client, open_stp, lock); |
| 2739 | if (lock_sop == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2740 | goto out; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2741 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
J. Bruce Fields | 8a28051 | 2006-01-18 17:43:18 -0800 | [diff] [blame] | 2742 | if (lock_stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2743 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2744 | } else { |
| 2745 | /* lock (lock owner + lock stateid) already exists */ |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2746 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2747 | lock->lk_old_lock_seqid, |
| 2748 | &lock->lk_old_lock_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2749 | LOCK_STATE, |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2750 | &lock->lk_replay_owner, &lock_stp, lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2751 | if (status) |
| 2752 | goto out; |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2753 | lock_sop = lock->lk_replay_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2754 | } |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2755 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2756 | filp = lock_stp->st_vfs_file; |
| 2757 | |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 2758 | status = nfserr_grace; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2759 | if (locks_in_grace() && !lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 2760 | goto out; |
| 2761 | status = nfserr_no_grace; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2762 | if (!locks_in_grace() && lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 2763 | goto out; |
| 2764 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2765 | locks_init_lock(&file_lock); |
| 2766 | switch (lock->lk_type) { |
| 2767 | case NFS4_READ_LT: |
| 2768 | case NFS4_READW_LT: |
| 2769 | file_lock.fl_type = F_RDLCK; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 2770 | cmd = F_SETLK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | break; |
| 2772 | case NFS4_WRITE_LT: |
| 2773 | case NFS4_WRITEW_LT: |
| 2774 | file_lock.fl_type = F_WRLCK; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 2775 | cmd = F_SETLK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2776 | break; |
| 2777 | default: |
| 2778 | status = nfserr_inval; |
| 2779 | goto out; |
| 2780 | } |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2781 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2782 | file_lock.fl_pid = current->tgid; |
| 2783 | file_lock.fl_file = filp; |
| 2784 | file_lock.fl_flags = FL_POSIX; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2785 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2786 | |
| 2787 | file_lock.fl_start = lock->lk_offset; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2788 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2789 | nfs4_transform_lock_offset(&file_lock); |
| 2790 | |
| 2791 | /* |
| 2792 | * Try to lock the file in the VFS. |
| 2793 | * Note: locks.c uses the BKL to protect the inode's lock list. |
| 2794 | */ |
| 2795 | |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2796 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2797 | switch (-err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2798 | case 0: /* success! */ |
| 2799 | update_stateid(&lock_stp->st_stateid); |
| 2800 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, |
| 2801 | sizeof(stateid_t)); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2802 | status = 0; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 2803 | break; |
| 2804 | case (EAGAIN): /* conflock holds conflicting lock */ |
| 2805 | status = nfserr_denied; |
| 2806 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); |
| 2807 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); |
| 2808 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2809 | case (EDEADLK): |
| 2810 | status = nfserr_deadlock; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 2811 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2812 | default: |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2813 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 2814 | status = nfserr_resource; |
| 2815 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2816 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2817 | out: |
J. Bruce Fields | 8a28051 | 2006-01-18 17:43:18 -0800 | [diff] [blame] | 2818 | if (status && lock->lk_is_new && lock_sop) |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 2819 | release_lockowner(lock_sop); |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2820 | if (lock->lk_replay_owner) { |
| 2821 | nfs4_get_stateowner(lock->lk_replay_owner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2822 | cstate->replay_owner = lock->lk_replay_owner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2823 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2824 | nfs4_unlock_state(); |
| 2825 | return status; |
| 2826 | } |
| 2827 | |
| 2828 | /* |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 2829 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, |
| 2830 | * so we do a temporary open here just to get an open file to pass to |
| 2831 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an |
| 2832 | * inode operation.) |
| 2833 | */ |
| 2834 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
| 2835 | { |
| 2836 | struct file *file; |
| 2837 | int err; |
| 2838 | |
| 2839 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
| 2840 | if (err) |
| 2841 | return err; |
| 2842 | err = vfs_test_lock(file, lock); |
| 2843 | nfsd_close(file); |
| 2844 | return err; |
| 2845 | } |
| 2846 | |
| 2847 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2848 | * LOCKT operation |
| 2849 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2850 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2851 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 2852 | struct nfsd4_lockt *lockt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2853 | { |
| 2854 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2855 | struct file_lock file_lock; |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2856 | int error; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2857 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2858 | |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2859 | if (locks_in_grace()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2860 | return nfserr_grace; |
| 2861 | |
| 2862 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) |
| 2863 | return nfserr_inval; |
| 2864 | |
| 2865 | lockt->lt_stateowner = NULL; |
| 2866 | nfs4_lock_state(); |
| 2867 | |
| 2868 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2869 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2870 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2871 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2872 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2873 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2874 | if (status == nfserr_symlink) |
| 2875 | status = nfserr_inval; |
| 2876 | goto out; |
| 2877 | } |
| 2878 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2879 | inode = cstate->current_fh.fh_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2880 | locks_init_lock(&file_lock); |
| 2881 | switch (lockt->lt_type) { |
| 2882 | case NFS4_READ_LT: |
| 2883 | case NFS4_READW_LT: |
| 2884 | file_lock.fl_type = F_RDLCK; |
| 2885 | break; |
| 2886 | case NFS4_WRITE_LT: |
| 2887 | case NFS4_WRITEW_LT: |
| 2888 | file_lock.fl_type = F_WRLCK; |
| 2889 | break; |
| 2890 | default: |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2891 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2892 | status = nfserr_inval; |
| 2893 | goto out; |
| 2894 | } |
| 2895 | |
| 2896 | lockt->lt_stateowner = find_lockstateowner_str(inode, |
| 2897 | &lockt->lt_clientid, &lockt->lt_owner); |
| 2898 | if (lockt->lt_stateowner) |
| 2899 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; |
| 2900 | file_lock.fl_pid = current->tgid; |
| 2901 | file_lock.fl_flags = FL_POSIX; |
| 2902 | |
| 2903 | file_lock.fl_start = lockt->lt_offset; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2904 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2905 | |
| 2906 | nfs4_transform_lock_offset(&file_lock); |
| 2907 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2908 | status = nfs_ok; |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 2909 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2910 | if (error) { |
| 2911 | status = nfserrno(error); |
| 2912 | goto out; |
| 2913 | } |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 2914 | if (file_lock.fl_type != F_UNLCK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2915 | status = nfserr_denied; |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 2916 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2917 | } |
| 2918 | out: |
| 2919 | nfs4_unlock_state(); |
| 2920 | return status; |
| 2921 | } |
| 2922 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2923 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2924 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2925 | struct nfsd4_locku *locku) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2926 | { |
| 2927 | struct nfs4_stateid *stp; |
| 2928 | struct file *filp = NULL; |
| 2929 | struct file_lock file_lock; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2930 | __be32 status; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2931 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2932 | |
| 2933 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
| 2934 | (long long) locku->lu_offset, |
| 2935 | (long long) locku->lu_length); |
| 2936 | |
| 2937 | if (check_lock_length(locku->lu_offset, locku->lu_length)) |
| 2938 | return nfserr_inval; |
| 2939 | |
| 2940 | nfs4_lock_state(); |
| 2941 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2942 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2943 | locku->lu_seqid, |
| 2944 | &locku->lu_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2945 | LOCK_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2946 | &locku->lu_stateowner, &stp, NULL))) |
| 2947 | goto out; |
| 2948 | |
| 2949 | filp = stp->st_vfs_file; |
| 2950 | BUG_ON(!filp); |
| 2951 | locks_init_lock(&file_lock); |
| 2952 | file_lock.fl_type = F_UNLCK; |
| 2953 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; |
| 2954 | file_lock.fl_pid = current->tgid; |
| 2955 | file_lock.fl_file = filp; |
| 2956 | file_lock.fl_flags = FL_POSIX; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2957 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2958 | file_lock.fl_start = locku->lu_offset; |
| 2959 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2960 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2961 | nfs4_transform_lock_offset(&file_lock); |
| 2962 | |
| 2963 | /* |
| 2964 | * Try to unlock the file in the VFS. |
| 2965 | */ |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2966 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2967 | if (err) { |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2968 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2969 | goto out_nfserr; |
| 2970 | } |
| 2971 | /* |
| 2972 | * OK, unlock succeeded; the only thing left to do is update the stateid. |
| 2973 | */ |
| 2974 | update_stateid(&stp->st_stateid); |
| 2975 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2976 | |
| 2977 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2978 | if (locku->lu_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2979 | nfs4_get_stateowner(locku->lu_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2980 | cstate->replay_owner = locku->lu_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2981 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2982 | nfs4_unlock_state(); |
| 2983 | return status; |
| 2984 | |
| 2985 | out_nfserr: |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2986 | status = nfserrno(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2987 | goto out; |
| 2988 | } |
| 2989 | |
| 2990 | /* |
| 2991 | * returns |
| 2992 | * 1: locks held by lockowner |
| 2993 | * 0: no locks held by lockowner |
| 2994 | */ |
| 2995 | static int |
| 2996 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) |
| 2997 | { |
| 2998 | struct file_lock **flpp; |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 2999 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3000 | int status = 0; |
| 3001 | |
| 3002 | lock_kernel(); |
| 3003 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 3004 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3005 | status = 1; |
| 3006 | goto out; |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 3007 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3008 | } |
| 3009 | out: |
| 3010 | unlock_kernel(); |
| 3011 | return status; |
| 3012 | } |
| 3013 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3014 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 3015 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
| 3016 | struct nfsd4_compound_state *cstate, |
| 3017 | struct nfsd4_release_lockowner *rlockowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | { |
| 3019 | clientid_t *clid = &rlockowner->rl_clientid; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3020 | struct nfs4_stateowner *sop; |
| 3021 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3023 | struct list_head matches; |
| 3024 | int i; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3025 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3026 | |
| 3027 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", |
| 3028 | clid->cl_boot, clid->cl_id); |
| 3029 | |
| 3030 | /* XXX check for lease expiration */ |
| 3031 | |
| 3032 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 3033 | if (STALE_CLIENTID(clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3034 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3035 | |
| 3036 | nfs4_lock_state(); |
| 3037 | |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3038 | status = nfserr_locks_held; |
| 3039 | /* XXX: we're doing a linear search through all the lockowners. |
| 3040 | * Yipes! For now we'll just hope clients aren't really using |
| 3041 | * release_lockowner much, but eventually we have to fix these |
| 3042 | * data structures. */ |
| 3043 | INIT_LIST_HEAD(&matches); |
| 3044 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 3045 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 3046 | if (!same_owner_str(sop, owner, clid)) |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3047 | continue; |
| 3048 | list_for_each_entry(stp, &sop->so_stateids, |
| 3049 | st_perstateowner) { |
| 3050 | if (check_for_locks(stp->st_vfs_file, sop)) |
| 3051 | goto out; |
| 3052 | /* Note: so_perclient unused for lockowners, |
| 3053 | * so it's OK to fool with here. */ |
| 3054 | list_add(&sop->so_perclient, &matches); |
| 3055 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3056 | } |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3057 | } |
| 3058 | /* Clients probably won't expect us to return with some (but not all) |
| 3059 | * of the lockowner state released; so don't release any until all |
| 3060 | * have been checked. */ |
| 3061 | status = nfs_ok; |
NeilBrown | 0fa822e | 2005-07-07 17:59:14 -0700 | [diff] [blame] | 3062 | while (!list_empty(&matches)) { |
| 3063 | sop = list_entry(matches.next, struct nfs4_stateowner, |
| 3064 | so_perclient); |
| 3065 | /* unhash_stateowner deletes so_perclient only |
| 3066 | * for openowners. */ |
| 3067 | list_del(&sop->so_perclient); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 3068 | release_lockowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3069 | } |
| 3070 | out: |
| 3071 | nfs4_unlock_state(); |
| 3072 | return status; |
| 3073 | } |
| 3074 | |
| 3075 | static inline struct nfs4_client_reclaim * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3076 | alloc_reclaim(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3077 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3078 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | } |
| 3080 | |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3081 | int |
| 3082 | nfs4_has_reclaimed_state(const char *name) |
| 3083 | { |
| 3084 | unsigned int strhashval = clientstr_hashval(name); |
| 3085 | struct nfs4_client *clp; |
| 3086 | |
| 3087 | clp = find_confirmed_client_by_str(name, strhashval); |
| 3088 | return clp ? 1 : 0; |
| 3089 | } |
| 3090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3091 | /* |
| 3092 | * failure => all reset bets are off, nfserr_no_grace... |
| 3093 | */ |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3094 | int |
| 3095 | nfs4_client_to_reclaim(const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3096 | { |
| 3097 | unsigned int strhashval; |
| 3098 | struct nfs4_client_reclaim *crp = NULL; |
| 3099 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3100 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
| 3101 | crp = alloc_reclaim(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3102 | if (!crp) |
| 3103 | return 0; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3104 | strhashval = clientstr_hashval(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3105 | INIT_LIST_HEAD(&crp->cr_strhash); |
| 3106 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3107 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3108 | reclaim_str_hashtbl_size++; |
| 3109 | return 1; |
| 3110 | } |
| 3111 | |
| 3112 | static void |
| 3113 | nfs4_release_reclaim(void) |
| 3114 | { |
| 3115 | struct nfs4_client_reclaim *crp = NULL; |
| 3116 | int i; |
| 3117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3118 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3119 | while (!list_empty(&reclaim_str_hashtbl[i])) { |
| 3120 | crp = list_entry(reclaim_str_hashtbl[i].next, |
| 3121 | struct nfs4_client_reclaim, cr_strhash); |
| 3122 | list_del(&crp->cr_strhash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3123 | kfree(crp); |
| 3124 | reclaim_str_hashtbl_size--; |
| 3125 | } |
| 3126 | } |
| 3127 | BUG_ON(reclaim_str_hashtbl_size); |
| 3128 | } |
| 3129 | |
| 3130 | /* |
| 3131 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3132 | static struct nfs4_client_reclaim * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3133 | nfs4_find_reclaim_client(clientid_t *clid) |
| 3134 | { |
| 3135 | unsigned int strhashval; |
| 3136 | struct nfs4_client *clp; |
| 3137 | struct nfs4_client_reclaim *crp = NULL; |
| 3138 | |
| 3139 | |
| 3140 | /* find clientid in conf_id_hashtbl */ |
| 3141 | clp = find_confirmed_client(clid); |
| 3142 | if (clp == NULL) |
| 3143 | return NULL; |
| 3144 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3145 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
| 3146 | clp->cl_name.len, clp->cl_name.data, |
| 3147 | clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3148 | |
| 3149 | /* find clp->cl_name in reclaim_str_hashtbl */ |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3150 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3151 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3152 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3153 | return crp; |
| 3154 | } |
| 3155 | } |
| 3156 | return NULL; |
| 3157 | } |
| 3158 | |
| 3159 | /* |
| 3160 | * Called from OPEN. Look for clientid in reclaim list. |
| 3161 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3162 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3163 | nfs4_check_open_reclaim(clientid_t *clid) |
| 3164 | { |
NeilBrown | dfc8356 | 2005-06-23 22:03:16 -0700 | [diff] [blame] | 3165 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3166 | } |
| 3167 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3168 | /* initialization to perform at module load time: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3169 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3170 | int |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3171 | nfs4_state_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3172 | { |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3173 | int i, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3174 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3175 | status = nfsd4_init_slabs(); |
| 3176 | if (status) |
| 3177 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3178 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3179 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); |
| 3180 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); |
| 3181 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); |
| 3182 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); |
| 3183 | } |
| 3184 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
| 3185 | INIT_LIST_HEAD(&file_hashtbl[i]); |
| 3186 | } |
| 3187 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
| 3188 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); |
| 3189 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); |
| 3190 | } |
| 3191 | for (i = 0; i < STATEID_HASH_SIZE; i++) { |
| 3192 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
| 3193 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); |
| 3194 | } |
| 3195 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 3196 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); |
| 3197 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); |
| 3198 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3199 | memset(&onestateid, ~0, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3200 | INIT_LIST_HEAD(&close_lru); |
| 3201 | INIT_LIST_HEAD(&client_lru); |
| 3202 | INIT_LIST_HEAD(&del_recall_lru); |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3203 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
| 3204 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
| 3205 | reclaim_str_hashtbl_size = 0; |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3206 | return 0; |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3207 | } |
| 3208 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3209 | static void |
| 3210 | nfsd4_load_reboot_recovery_data(void) |
| 3211 | { |
| 3212 | int status; |
| 3213 | |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3214 | nfs4_lock_state(); |
| 3215 | nfsd4_init_recdir(user_recovery_dirname); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3216 | status = nfsd4_recdir_load(); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3217 | nfs4_unlock_state(); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3218 | if (status) |
| 3219 | printk("NFSD: Failure reading reboot recovery data\n"); |
| 3220 | } |
| 3221 | |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 3222 | unsigned long |
| 3223 | get_nfs4_grace_period(void) |
| 3224 | { |
| 3225 | return max(user_lease_time, lease_time) * HZ; |
| 3226 | } |
| 3227 | |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 3228 | /* |
| 3229 | * Since the lifetime of a delegation isn't limited to that of an open, a |
| 3230 | * client may quite reasonably hang on to a delegation as long as it has |
| 3231 | * the inode cached. This becomes an obvious problem the first time a |
| 3232 | * client's inode cache approaches the size of the server's total memory. |
| 3233 | * |
| 3234 | * For now we avoid this problem by imposing a hard limit on the number |
| 3235 | * of delegations, which varies according to the server's memory size. |
| 3236 | */ |
| 3237 | static void |
| 3238 | set_max_delegations(void) |
| 3239 | { |
| 3240 | /* |
| 3241 | * Allow at most 4 delegations per megabyte of RAM. Quick |
| 3242 | * estimates suggest that in the worst case (where every delegation |
| 3243 | * is for a different inode), a delegation could take about 1.5K, |
| 3244 | * giving a worst case usage of about 6% of memory. |
| 3245 | */ |
| 3246 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); |
| 3247 | } |
| 3248 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3249 | /* initialization to perform when the nfsd service is started: */ |
| 3250 | |
| 3251 | static void |
| 3252 | __nfs4_state_start(void) |
| 3253 | { |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 3254 | unsigned long grace_time; |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3256 | boot_time = get_seconds(); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3257 | grace_time = get_nfs4_grace_period(); |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3258 | lease_time = user_lease_time; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3259 | locks_start_grace(&nfsd4_manager); |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 3260 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
| 3261 | grace_time/HZ); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 3262 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 3263 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 3264 | set_max_delegations(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3265 | } |
| 3266 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3267 | void |
NeilBrown | 76a3550 | 2005-06-23 22:03:26 -0700 | [diff] [blame] | 3268 | nfs4_state_start(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3269 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3270 | if (nfs4_init) |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3271 | return; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3272 | nfsd4_load_reboot_recovery_data(); |
NeilBrown | 76a3550 | 2005-06-23 22:03:26 -0700 | [diff] [blame] | 3273 | __nfs4_state_start(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3274 | nfs4_init = 1; |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3275 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3276 | } |
| 3277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3278 | time_t |
| 3279 | nfs4_lease_time(void) |
| 3280 | { |
| 3281 | return lease_time; |
| 3282 | } |
| 3283 | |
| 3284 | static void |
| 3285 | __nfs4_state_shutdown(void) |
| 3286 | { |
| 3287 | int i; |
| 3288 | struct nfs4_client *clp = NULL; |
| 3289 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3290 | struct list_head *pos, *next, reaplist; |
| 3291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3292 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3293 | while (!list_empty(&conf_id_hashtbl[i])) { |
| 3294 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); |
| 3295 | expire_client(clp); |
| 3296 | } |
| 3297 | while (!list_empty(&unconf_str_hashtbl[i])) { |
| 3298 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); |
| 3299 | expire_client(clp); |
| 3300 | } |
| 3301 | } |
| 3302 | INIT_LIST_HEAD(&reaplist); |
| 3303 | spin_lock(&recall_lock); |
| 3304 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 3305 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 3306 | list_move(&dp->dl_recall_lru, &reaplist); |
| 3307 | } |
| 3308 | spin_unlock(&recall_lock); |
| 3309 | list_for_each_safe(pos, next, &reaplist) { |
| 3310 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 3311 | list_del_init(&dp->dl_recall_lru); |
| 3312 | unhash_delegation(dp); |
| 3313 | } |
| 3314 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3315 | nfsd4_shutdown_recdir(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3316 | nfs4_init = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3317 | } |
| 3318 | |
| 3319 | void |
| 3320 | nfs4_state_shutdown(void) |
| 3321 | { |
NeilBrown | 5e8d5c2 | 2006-04-10 22:55:37 -0700 | [diff] [blame] | 3322 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
| 3323 | destroy_workqueue(laundry_wq); |
J. Bruce Fields | 2c5e761 | 2008-11-20 14:36:17 -0600 | [diff] [blame] | 3324 | locks_end_grace(&nfsd4_manager); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3325 | nfs4_lock_state(); |
| 3326 | nfs4_release_reclaim(); |
| 3327 | __nfs4_state_shutdown(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3328 | nfs4_unlock_state(); |
| 3329 | } |
| 3330 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 3331 | /* |
| 3332 | * user_recovery_dirname is protected by the nfsd_mutex since it's only |
| 3333 | * accessed when nfsd is starting. |
| 3334 | */ |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3335 | static void |
| 3336 | nfs4_set_recdir(char *recdir) |
| 3337 | { |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3338 | strcpy(user_recovery_dirname, recdir); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3339 | } |
| 3340 | |
| 3341 | /* |
| 3342 | * Change the NFSv4 recovery directory to recdir. |
| 3343 | */ |
| 3344 | int |
| 3345 | nfs4_reset_recoverydir(char *recdir) |
| 3346 | { |
| 3347 | int status; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 3348 | struct path path; |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3349 | |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 3350 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3351 | if (status) |
| 3352 | return status; |
| 3353 | status = -ENOTDIR; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 3354 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3355 | nfs4_set_recdir(recdir); |
| 3356 | status = 0; |
| 3357 | } |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 3358 | path_put(&path); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3359 | return status; |
| 3360 | } |
| 3361 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 3362 | char * |
| 3363 | nfs4_recoverydir(void) |
| 3364 | { |
| 3365 | return user_recovery_dirname; |
| 3366 | } |
| 3367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3368 | /* |
| 3369 | * Called when leasetime is changed. |
| 3370 | * |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3371 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
| 3372 | * simulate a reboot. Instead of doing that, we just wait till the next time |
| 3373 | * we start to register any changes in lease time. If the administrator |
| 3374 | * really wants to change the lease time *now*, they can go ahead and bring |
| 3375 | * nfsd down and then back up again after changing the lease time. |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 3376 | * |
| 3377 | * user_lease_time is protected by nfsd_mutex since it's only really accessed |
| 3378 | * when nfsd is starting |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3379 | */ |
| 3380 | void |
| 3381 | nfs4_reset_lease(time_t leasetime) |
| 3382 | { |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3383 | user_lease_time = leasetime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3384 | } |