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 | |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame^] | 385 | static void |
| 386 | release_session(struct nfsd4_session *ses) |
| 387 | { |
| 388 | list_del(&ses->se_hash); |
| 389 | list_del(&ses->se_perclnt); |
| 390 | nfsd4_put_session(ses); |
| 391 | } |
| 392 | |
| 393 | void |
| 394 | free_session(struct kref *kref) |
| 395 | { |
| 396 | struct nfsd4_session *ses; |
| 397 | |
| 398 | ses = container_of(kref, struct nfsd4_session, se_ref); |
| 399 | kfree(ses->se_slots); |
| 400 | kfree(ses); |
| 401 | } |
| 402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | static inline void |
| 404 | renew_client(struct nfs4_client *clp) |
| 405 | { |
| 406 | /* |
| 407 | * Move client to the end to the LRU list. |
| 408 | */ |
| 409 | dprintk("renewing client (clientid %08x/%08x)\n", |
| 410 | clp->cl_clientid.cl_boot, |
| 411 | clp->cl_clientid.cl_id); |
| 412 | list_move_tail(&clp->cl_lru, &client_lru); |
| 413 | clp->cl_time = get_seconds(); |
| 414 | } |
| 415 | |
| 416 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
| 417 | static int |
| 418 | STALE_CLIENTID(clientid_t *clid) |
| 419 | { |
| 420 | if (clid->cl_boot == boot_time) |
| 421 | return 0; |
| 422 | dprintk("NFSD stale clientid (%08x/%08x)\n", |
| 423 | clid->cl_boot, clid->cl_id); |
| 424 | return 1; |
| 425 | } |
| 426 | |
| 427 | /* |
| 428 | * XXX Should we use a slab cache ? |
| 429 | * This type of memory management is somewhat inefficient, but we use it |
| 430 | * anyway since SETCLIENTID is not a common operation. |
| 431 | */ |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 432 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | { |
| 434 | struct nfs4_client *clp; |
| 435 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 436 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
| 437 | if (clp == NULL) |
| 438 | return NULL; |
| 439 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); |
| 440 | if (clp->cl_name.data == NULL) { |
| 441 | kfree(clp); |
| 442 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | } |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 444 | memcpy(clp->cl_name.data, name.data, name.len); |
| 445 | clp->cl_name.len = name.len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | return clp; |
| 447 | } |
| 448 | |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 449 | static void |
| 450 | shutdown_callback_client(struct nfs4_client *clp) |
| 451 | { |
| 452 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; |
| 453 | |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 454 | if (clnt) { |
J. Bruce Fields | 404ec11 | 2007-11-23 22:26:18 -0500 | [diff] [blame] | 455 | /* |
| 456 | * Callback threads take a reference on the client, so there |
| 457 | * should be no outstanding callbacks at this point. |
| 458 | */ |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 459 | clp->cl_callback.cb_client = NULL; |
| 460 | rpc_shutdown_client(clnt); |
| 461 | } |
| 462 | } |
| 463 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | static inline void |
| 465 | free_client(struct nfs4_client *clp) |
| 466 | { |
J. Bruce Fields | 1b1a9b3 | 2007-09-12 08:43:59 -0400 | [diff] [blame] | 467 | shutdown_callback_client(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | if (clp->cl_cred.cr_group_info) |
| 469 | put_group_info(clp->cl_cred.cr_group_info); |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 470 | kfree(clp->cl_principal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | kfree(clp->cl_name.data); |
| 472 | kfree(clp); |
| 473 | } |
| 474 | |
| 475 | void |
| 476 | put_nfs4_client(struct nfs4_client *clp) |
| 477 | { |
| 478 | if (atomic_dec_and_test(&clp->cl_count)) |
| 479 | free_client(clp); |
| 480 | } |
| 481 | |
| 482 | static void |
| 483 | expire_client(struct nfs4_client *clp) |
| 484 | { |
| 485 | struct nfs4_stateowner *sop; |
| 486 | struct nfs4_delegation *dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | struct list_head reaplist; |
| 488 | |
| 489 | dprintk("NFSD: expire_client cl_count %d\n", |
| 490 | atomic_read(&clp->cl_count)); |
| 491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | INIT_LIST_HEAD(&reaplist); |
| 493 | spin_lock(&recall_lock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 494 | while (!list_empty(&clp->cl_delegations)) { |
| 495 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
| 497 | dp->dl_flock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 498 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | list_move(&dp->dl_recall_lru, &reaplist); |
| 500 | } |
| 501 | spin_unlock(&recall_lock); |
| 502 | while (!list_empty(&reaplist)) { |
| 503 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
| 504 | list_del_init(&dp->dl_recall_lru); |
| 505 | unhash_delegation(dp); |
| 506 | } |
| 507 | list_del(&clp->cl_idhash); |
| 508 | list_del(&clp->cl_strhash); |
| 509 | list_del(&clp->cl_lru); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 510 | while (!list_empty(&clp->cl_openowners)) { |
| 511 | 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] | 512 | release_openowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
| 514 | put_nfs4_client(clp); |
| 515 | } |
| 516 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 517 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
| 518 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | struct nfs4_client *clp; |
| 520 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 521 | clp = alloc_client(name); |
| 522 | if (clp == NULL) |
| 523 | return NULL; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 524 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | atomic_set(&clp->cl_count, 1); |
| 526 | atomic_set(&clp->cl_callback.cb_set, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | INIT_LIST_HEAD(&clp->cl_idhash); |
| 528 | INIT_LIST_HEAD(&clp->cl_strhash); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 529 | INIT_LIST_HEAD(&clp->cl_openowners); |
| 530 | INIT_LIST_HEAD(&clp->cl_delegations); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | INIT_LIST_HEAD(&clp->cl_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | return clp; |
| 533 | } |
| 534 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 535 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
| 536 | { |
| 537 | memcpy(target->cl_verifier.data, source->data, |
| 538 | sizeof(target->cl_verifier.data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | } |
| 540 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 541 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
| 542 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
| 544 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; |
| 545 | } |
| 546 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 547 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
| 548 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | target->cr_uid = source->cr_uid; |
| 550 | target->cr_gid = source->cr_gid; |
| 551 | target->cr_group_info = source->cr_group_info; |
| 552 | get_group_info(target->cr_group_info); |
| 553 | } |
| 554 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 555 | static int same_name(const char *n1, const char *n2) |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 556 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 557 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | } |
| 559 | |
| 560 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 561 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
| 562 | { |
| 563 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | } |
| 565 | |
| 566 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 567 | same_clid(clientid_t *cl1, clientid_t *cl2) |
| 568 | { |
| 569 | 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] | 570 | } |
| 571 | |
| 572 | /* XXX what about NGROUP */ |
| 573 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 574 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
| 575 | { |
| 576 | return cr1->cr_uid == cr2->cr_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | } |
| 578 | |
J. Bruce Fields | 5ec7b46 | 2007-11-21 21:58:56 -0500 | [diff] [blame] | 579 | static void gen_clid(struct nfs4_client *clp) |
| 580 | { |
| 581 | static u32 current_clientid = 1; |
| 582 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | clp->cl_clientid.cl_boot = boot_time; |
| 584 | clp->cl_clientid.cl_id = current_clientid++; |
| 585 | } |
| 586 | |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 587 | static void gen_confirm(struct nfs4_client *clp) |
| 588 | { |
| 589 | static u32 i; |
| 590 | u32 *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | p = (u32 *)clp->cl_confirm.data; |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 593 | *p++ = get_seconds(); |
| 594 | *p++ = i++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | } |
| 596 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 597 | static int check_name(struct xdr_netobj name) |
| 598 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | if (name.len == 0) |
| 600 | return 0; |
| 601 | if (name.len > NFS4_OPAQUE_LIMIT) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 602 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | return 0; |
| 604 | } |
| 605 | return 1; |
| 606 | } |
| 607 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 608 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
| 610 | { |
| 611 | unsigned int idhashval; |
| 612 | |
| 613 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); |
| 614 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 615 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); |
| 616 | list_add_tail(&clp->cl_lru, &client_lru); |
| 617 | clp->cl_time = get_seconds(); |
| 618 | } |
| 619 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 620 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | move_to_confirmed(struct nfs4_client *clp) |
| 622 | { |
| 623 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 624 | unsigned int strhashval; |
| 625 | |
| 626 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
| 627 | list_del_init(&clp->cl_strhash); |
Akinobu Mita | f116629 | 2006-06-26 00:24:46 -0700 | [diff] [blame] | 628 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 629 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
| 631 | renew_client(clp); |
| 632 | } |
| 633 | |
| 634 | static struct nfs4_client * |
| 635 | find_confirmed_client(clientid_t *clid) |
| 636 | { |
| 637 | struct nfs4_client *clp; |
| 638 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 639 | |
| 640 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 641 | if (same_clid(&clp->cl_clientid, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | return clp; |
| 643 | } |
| 644 | return NULL; |
| 645 | } |
| 646 | |
| 647 | static struct nfs4_client * |
| 648 | find_unconfirmed_client(clientid_t *clid) |
| 649 | { |
| 650 | struct nfs4_client *clp; |
| 651 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 652 | |
| 653 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 654 | if (same_clid(&clp->cl_clientid, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | return clp; |
| 656 | } |
| 657 | return NULL; |
| 658 | } |
| 659 | |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 660 | static struct nfs4_client * |
| 661 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
| 662 | { |
| 663 | struct nfs4_client *clp; |
| 664 | |
| 665 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { |
| 666 | if (same_name(clp->cl_recdir, dname)) |
| 667 | return clp; |
| 668 | } |
| 669 | return NULL; |
| 670 | } |
| 671 | |
| 672 | static struct nfs4_client * |
| 673 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
| 674 | { |
| 675 | struct nfs4_client *clp; |
| 676 | |
| 677 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { |
| 678 | if (same_name(clp->cl_recdir, dname)) |
| 679 | return clp; |
| 680 | } |
| 681 | return NULL; |
| 682 | } |
| 683 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | /* a helper function for parse_callback */ |
| 685 | static int |
| 686 | parse_octet(unsigned int *lenp, char **addrp) |
| 687 | { |
| 688 | unsigned int len = *lenp; |
| 689 | char *p = *addrp; |
| 690 | int n = -1; |
| 691 | char c; |
| 692 | |
| 693 | for (;;) { |
| 694 | if (!len) |
| 695 | break; |
| 696 | len--; |
| 697 | c = *p++; |
| 698 | if (c == '.') |
| 699 | break; |
| 700 | if ((c < '0') || (c > '9')) { |
| 701 | n = -1; |
| 702 | break; |
| 703 | } |
| 704 | if (n < 0) |
| 705 | n = 0; |
| 706 | n = (n * 10) + (c - '0'); |
| 707 | if (n > 255) { |
| 708 | n = -1; |
| 709 | break; |
| 710 | } |
| 711 | } |
| 712 | *lenp = len; |
| 713 | *addrp = p; |
| 714 | return n; |
| 715 | } |
| 716 | |
| 717 | /* parse and set the setclientid ipv4 callback address */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 718 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
| 720 | { |
| 721 | int temp = 0; |
| 722 | u32 cbaddr = 0; |
| 723 | u16 cbport = 0; |
| 724 | u32 addrlen = addr_len; |
| 725 | char *addr = addr_val; |
| 726 | int i, shift; |
| 727 | |
| 728 | /* ipaddress */ |
| 729 | shift = 24; |
| 730 | for(i = 4; i > 0 ; i--) { |
| 731 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { |
| 732 | return 0; |
| 733 | } |
| 734 | cbaddr |= (temp << shift); |
| 735 | if (shift > 0) |
| 736 | shift -= 8; |
| 737 | } |
| 738 | *cbaddrp = cbaddr; |
| 739 | |
| 740 | /* port */ |
| 741 | shift = 8; |
| 742 | for(i = 2; i > 0 ; i--) { |
| 743 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { |
| 744 | return 0; |
| 745 | } |
| 746 | cbport |= (temp << shift); |
| 747 | if (shift > 0) |
| 748 | shift -= 8; |
| 749 | } |
| 750 | *cbportp = cbport; |
| 751 | return 1; |
| 752 | } |
| 753 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 754 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
| 756 | { |
| 757 | struct nfs4_callback *cb = &clp->cl_callback; |
| 758 | |
| 759 | /* Currently, we only support tcp for the callback channel */ |
| 760 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) |
| 761 | goto out_err; |
| 762 | |
| 763 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, |
| 764 | &cb->cb_addr, &cb->cb_port))) |
| 765 | goto out_err; |
| 766 | cb->cb_prog = se->se_callback_prog; |
| 767 | cb->cb_ident = se->se_callback_ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | return; |
| 769 | out_err: |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 770 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | "will not receive delegations\n", |
| 772 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 773 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | return; |
| 775 | } |
| 776 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 777 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 778 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 779 | struct nfsd4_setclientid *setclid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | { |
Chuck Lever | 27459f0 | 2007-02-12 00:53:34 -0800 | [diff] [blame] | 781 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | struct xdr_netobj clname = { |
| 783 | .len = setclid->se_namelen, |
| 784 | .data = setclid->se_name, |
| 785 | }; |
| 786 | nfs4_verifier clverifier = setclid->se_verf; |
| 787 | unsigned int strhashval; |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 788 | struct nfs4_client *conf, *unconf, *new; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 789 | __be32 status; |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 790 | char *princ; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 791 | char dname[HEXDIR_LEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | if (!check_name(clname)) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 794 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 796 | status = nfs4_make_rec_clidname(dname, &clname); |
| 797 | if (status) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 798 | return status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 799 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | /* |
| 801 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 802 | * We get here on a DRC miss. |
| 803 | */ |
| 804 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 805 | strhashval = clientstr_hashval(dname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | nfs4_lock_state(); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 808 | conf = find_confirmed_client_by_str(dname, strhashval); |
| 809 | if (conf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 810 | /* RFC 3530 14.2.33 CASE 0: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | status = nfserr_clid_inuse; |
J. Bruce Fields | 026722c | 2009-03-18 15:06:26 -0400 | [diff] [blame] | 812 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
| 813 | dprintk("NFSD: setclientid: string in use by client" |
| 814 | " at %pI4\n", &conf->cl_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | goto out; |
| 816 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | } |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 818 | /* |
| 819 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") |
| 820 | * has a description of SETCLIENTID request processing consisting |
| 821 | * of 5 bullet points, labeled as CASE0 - CASE4 below. |
| 822 | */ |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 823 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | status = nfserr_resource; |
| 825 | if (!conf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 826 | /* |
| 827 | * RFC 3530 14.2.33 CASE 4: |
| 828 | * placed first, because it is the normal case |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | */ |
| 830 | if (unconf) |
| 831 | expire_client(unconf); |
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 | gen_clid(new); |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 836 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 838 | * RFC 3530 14.2.33 CASE 1: |
| 839 | * probable callback update |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | */ |
NeilBrown | 31f4a6c | 2005-06-23 22:04:06 -0700 | [diff] [blame] | 841 | if (unconf) { |
| 842 | /* Note this is removing unconfirmed {*x***}, |
| 843 | * which is stronger than RFC recommended {vxc**}. |
| 844 | * This has the advantage that there is at most |
| 845 | * one {*x***} in either list at any time. |
| 846 | */ |
| 847 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | } |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 849 | new = create_client(clname, dname); |
| 850 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | copy_clid(new, conf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | } else if (!unconf) { |
| 854 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 855 | * RFC 3530 14.2.33 CASE 2: |
| 856 | * probable client reboot; state will be removed if |
| 857 | * confirmed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | */ |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 859 | new = create_client(clname, dname); |
| 860 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | gen_clid(new); |
J. Bruce Fields | 49ba878 | 2007-11-19 19:09:50 -0500 | [diff] [blame] | 863 | } else { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 864 | /* |
| 865 | * RFC 3530 14.2.33 CASE 3: |
| 866 | * probable client reboot; state will be removed if |
| 867 | * confirmed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | */ |
| 869 | expire_client(unconf); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 870 | new = create_client(clname, dname); |
| 871 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | gen_clid(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | } |
J. Bruce Fields | c175b83 | 2007-08-09 18:34:32 -0400 | [diff] [blame] | 875 | copy_verf(new, &clverifier); |
| 876 | new->cl_addr = sin->sin_addr.s_addr; |
Olga Kornievskaia | 61054b1 | 2008-12-23 16:19:00 -0500 | [diff] [blame] | 877 | new->cl_flavor = rqstp->rq_flavor; |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 878 | princ = svc_gss_principal(rqstp); |
| 879 | if (princ) { |
| 880 | new->cl_principal = kstrdup(princ, GFP_KERNEL); |
| 881 | if (new->cl_principal == NULL) { |
| 882 | free_client(new); |
| 883 | goto out; |
| 884 | } |
| 885 | } |
J. Bruce Fields | c175b83 | 2007-08-09 18:34:32 -0400 | [diff] [blame] | 886 | copy_cred(&new->cl_cred, &rqstp->rq_cred); |
| 887 | gen_confirm(new); |
| 888 | gen_callback(new, setclid); |
| 889 | add_to_unconfirmed(new, strhashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
| 891 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; |
| 892 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); |
| 893 | status = nfs_ok; |
| 894 | out: |
| 895 | nfs4_unlock_state(); |
| 896 | return status; |
| 897 | } |
| 898 | |
| 899 | |
| 900 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 901 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
| 902 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 |
| 903 | * bullets, labeled as CASE1 - CASE4 below. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 905 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 906 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
| 907 | struct nfsd4_compound_state *cstate, |
| 908 | struct nfsd4_setclientid_confirm *setclientid_confirm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | { |
Chuck Lever | 27459f0 | 2007-02-12 00:53:34 -0800 | [diff] [blame] | 910 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 911 | struct nfs4_client *conf, *unconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
| 913 | clientid_t * clid = &setclientid_confirm->sc_clientid; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 914 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | |
| 916 | if (STALE_CLIENTID(clid)) |
| 917 | return nfserr_stale_clientid; |
| 918 | /* |
| 919 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 920 | * We get here on a DRC miss. |
| 921 | */ |
| 922 | |
| 923 | nfs4_lock_state(); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 924 | |
| 925 | conf = find_confirmed_client(clid); |
| 926 | unconf = find_unconfirmed_client(clid); |
| 927 | |
| 928 | status = nfserr_clid_inuse; |
Chuck Lever | 27459f0 | 2007-02-12 00:53:34 -0800 | [diff] [blame] | 929 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 930 | goto out; |
Chuck Lever | 27459f0 | 2007-02-12 00:53:34 -0800 | [diff] [blame] | 931 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 932 | goto out; |
| 933 | |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 934 | /* |
| 935 | * section 14.2.34 of RFC 3530 has a description of |
| 936 | * SETCLIENTID_CONFIRM request processing consisting |
| 937 | * of 4 bullet points, labeled as CASE1 - CASE4 below. |
| 938 | */ |
J. Bruce Fields | 366e0c1 | 2007-11-20 15:54:10 -0500 | [diff] [blame] | 939 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 940 | /* |
| 941 | * RFC 3530 14.2.34 CASE 1: |
| 942 | * callback update |
| 943 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 944 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | status = nfserr_clid_inuse; |
| 946 | else { |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 947 | /* XXX: We just turn off callbacks until we can handle |
| 948 | * change request correctly. */ |
NeilBrown | cb36d63 | 2005-06-23 22:04:23 -0700 | [diff] [blame] | 949 | atomic_set(&conf->cl_callback.cb_set, 0); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 950 | gen_confirm(conf); |
NeilBrown | 4630902 | 2005-07-07 17:59:10 -0700 | [diff] [blame] | 951 | nfsd4_remove_clid_dir(unconf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 952 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | status = nfs_ok; |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 954 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | } |
J. Bruce Fields | f3aba4e | 2007-11-20 16:52:07 -0500 | [diff] [blame] | 956 | } else if (conf && !unconf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 957 | /* |
| 958 | * RFC 3530 14.2.34 CASE 2: |
| 959 | * probable retransmitted request; play it safe and |
| 960 | * do nothing. |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 961 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 962 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | status = nfserr_clid_inuse; |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 964 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | status = nfs_ok; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 966 | } else if (!conf && unconf |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 967 | && same_verf(&unconf->cl_confirm, &confirm)) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 968 | /* |
| 969 | * RFC 3530 14.2.34 CASE 3: |
| 970 | * Normal case; new or rebooted client: |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 971 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 972 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | status = nfserr_clid_inuse; |
| 974 | } else { |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 975 | unsigned int hash = |
| 976 | clientstr_hashval(unconf->cl_recdir); |
| 977 | conf = find_confirmed_client_by_str(unconf->cl_recdir, |
| 978 | hash); |
| 979 | if (conf) { |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 980 | nfsd4_remove_clid_dir(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 981 | expire_client(conf); |
| 982 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | move_to_confirmed(unconf); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 984 | conf = unconf; |
J. Bruce Fields | 46f8a64 | 2007-11-22 13:54:18 -0500 | [diff] [blame] | 985 | nfsd4_probe_callback(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 986 | status = nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | } |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 988 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
| 989 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 990 | &confirm)))) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 991 | /* |
| 992 | * RFC 3530 14.2.34 CASE 4: |
| 993 | * Client probably hasn't noticed that we rebooted yet. |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 994 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | status = nfserr_stale_clientid; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 996 | } else { |
NeilBrown | 08e8987 | 2005-06-23 22:04:11 -0700 | [diff] [blame] | 997 | /* check that we have hit one of the cases...*/ |
| 998 | status = nfserr_clid_inuse; |
| 999 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | nfs4_unlock_state(); |
| 1002 | return status; |
| 1003 | } |
| 1004 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | /* OPEN Share state helper functions */ |
| 1006 | static inline struct nfs4_file * |
| 1007 | alloc_init_file(struct inode *ino) |
| 1008 | { |
| 1009 | struct nfs4_file *fp; |
| 1010 | unsigned int hashval = file_hashval(ino); |
| 1011 | |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1012 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
| 1013 | if (fp) { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1014 | atomic_set(&fp->fi_ref, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | INIT_LIST_HEAD(&fp->fi_hash); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1016 | INIT_LIST_HEAD(&fp->fi_stateids); |
| 1017 | INIT_LIST_HEAD(&fp->fi_delegations); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1018 | spin_lock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1020 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | fp->fi_inode = igrab(ino); |
| 1022 | fp->fi_id = current_fileid++; |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1023 | fp->fi_had_conflict = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | return fp; |
| 1025 | } |
| 1026 | return NULL; |
| 1027 | } |
| 1028 | |
| 1029 | static void |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 1030 | nfsd4_free_slab(struct kmem_cache **slab) |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1031 | { |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1032 | if (*slab == NULL) |
| 1033 | return; |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1034 | kmem_cache_destroy(*slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1035 | *slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1036 | } |
| 1037 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 1038 | void |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1039 | nfsd4_free_slabs(void) |
| 1040 | { |
| 1041 | nfsd4_free_slab(&stateowner_slab); |
| 1042 | nfsd4_free_slab(&file_slab); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1043 | nfsd4_free_slab(&stateid_slab); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1044 | nfsd4_free_slab(&deleg_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1045 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | |
| 1047 | static int |
| 1048 | nfsd4_init_slabs(void) |
| 1049 | { |
| 1050 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1051 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1052 | if (stateowner_slab == NULL) |
| 1053 | goto out_nomem; |
| 1054 | file_slab = kmem_cache_create("nfsd4_files", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1055 | sizeof(struct nfs4_file), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1056 | if (file_slab == NULL) |
| 1057 | goto out_nomem; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1058 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1059 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1060 | if (stateid_slab == NULL) |
| 1061 | goto out_nomem; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1062 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1063 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1064 | if (deleg_slab == NULL) |
| 1065 | goto out_nomem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | return 0; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1067 | out_nomem: |
| 1068 | nfsd4_free_slabs(); |
| 1069 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
| 1070 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | } |
| 1072 | |
| 1073 | void |
| 1074 | nfs4_free_stateowner(struct kref *kref) |
| 1075 | { |
| 1076 | struct nfs4_stateowner *sop = |
| 1077 | container_of(kref, struct nfs4_stateowner, so_ref); |
| 1078 | kfree(sop->so_owner.data); |
| 1079 | kmem_cache_free(stateowner_slab, sop); |
| 1080 | } |
| 1081 | |
| 1082 | static inline struct nfs4_stateowner * |
| 1083 | alloc_stateowner(struct xdr_netobj *owner) |
| 1084 | { |
| 1085 | struct nfs4_stateowner *sop; |
| 1086 | |
| 1087 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { |
| 1088 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { |
| 1089 | memcpy(sop->so_owner.data, owner->data, owner->len); |
| 1090 | sop->so_owner.len = owner->len; |
| 1091 | kref_init(&sop->so_ref); |
| 1092 | return sop; |
| 1093 | } |
| 1094 | kmem_cache_free(stateowner_slab, sop); |
| 1095 | } |
| 1096 | return NULL; |
| 1097 | } |
| 1098 | |
| 1099 | static struct nfs4_stateowner * |
| 1100 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
| 1101 | struct nfs4_stateowner *sop; |
| 1102 | struct nfs4_replay *rp; |
| 1103 | unsigned int idhashval; |
| 1104 | |
| 1105 | if (!(sop = alloc_stateowner(&open->op_owner))) |
| 1106 | return NULL; |
| 1107 | idhashval = ownerid_hashval(current_ownerid); |
| 1108 | INIT_LIST_HEAD(&sop->so_idhash); |
| 1109 | INIT_LIST_HEAD(&sop->so_strhash); |
| 1110 | INIT_LIST_HEAD(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1111 | INIT_LIST_HEAD(&sop->so_stateids); |
| 1112 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | INIT_LIST_HEAD(&sop->so_close_lru); |
| 1114 | sop->so_time = 0; |
| 1115 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); |
| 1116 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1117 | list_add(&sop->so_perclient, &clp->cl_openowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | sop->so_is_open_owner = 1; |
| 1119 | sop->so_id = current_ownerid++; |
| 1120 | sop->so_client = clp; |
| 1121 | sop->so_seqid = open->op_seqid; |
| 1122 | sop->so_confirmed = 0; |
| 1123 | rp = &sop->so_replay; |
Al Viro | de1ae28 | 2006-01-18 17:43:47 -0800 | [diff] [blame] | 1124 | rp->rp_status = nfserr_serverfault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | rp->rp_buflen = 0; |
| 1126 | rp->rp_buf = rp->rp_ibuf; |
| 1127 | return sop; |
| 1128 | } |
| 1129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | static inline void |
| 1131 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
| 1132 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 1133 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 1134 | |
| 1135 | INIT_LIST_HEAD(&stp->st_hash); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1136 | INIT_LIST_HEAD(&stp->st_perstateowner); |
| 1137 | INIT_LIST_HEAD(&stp->st_lockowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | INIT_LIST_HEAD(&stp->st_perfile); |
| 1139 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1140 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1141 | list_add(&stp->st_perfile, &fp->fi_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1143 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | stp->st_file = fp; |
| 1145 | stp->st_stateid.si_boot = boot_time; |
| 1146 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 1147 | stp->st_stateid.si_fileid = fp->fi_id; |
| 1148 | stp->st_stateid.si_generation = 0; |
| 1149 | stp->st_access_bmap = 0; |
| 1150 | stp->st_deny_bmap = 0; |
| 1151 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
| 1152 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 1153 | stp->st_openstp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | } |
| 1155 | |
| 1156 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | move_to_close_lru(struct nfs4_stateowner *sop) |
| 1158 | { |
| 1159 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); |
| 1160 | |
NeilBrown | 358dd55 | 2006-04-10 22:55:42 -0700 | [diff] [blame] | 1161 | list_move_tail(&sop->so_close_lru, &close_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | sop->so_time = get_seconds(); |
| 1163 | } |
| 1164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1166 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
| 1167 | clientid_t *clid) |
| 1168 | { |
| 1169 | return (sop->so_owner.len == owner->len) && |
| 1170 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && |
| 1171 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | } |
| 1173 | |
| 1174 | static struct nfs4_stateowner * |
| 1175 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
| 1176 | { |
| 1177 | struct nfs4_stateowner *so = NULL; |
| 1178 | |
| 1179 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1180 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | return so; |
| 1182 | } |
| 1183 | return NULL; |
| 1184 | } |
| 1185 | |
| 1186 | /* search file_hashtbl[] for file */ |
| 1187 | static struct nfs4_file * |
| 1188 | find_file(struct inode *ino) |
| 1189 | { |
| 1190 | unsigned int hashval = file_hashval(ino); |
| 1191 | struct nfs4_file *fp; |
| 1192 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1193 | spin_lock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1195 | if (fp->fi_inode == ino) { |
| 1196 | get_nfs4_file(fp); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1197 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | return fp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1199 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | } |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 1201 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | return NULL; |
| 1203 | } |
| 1204 | |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1205 | static inline int access_valid(u32 x) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1206 | { |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1207 | if (x < NFS4_SHARE_ACCESS_READ) |
| 1208 | return 0; |
| 1209 | if (x > NFS4_SHARE_ACCESS_BOTH) |
| 1210 | return 0; |
| 1211 | return 1; |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1212 | } |
| 1213 | |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1214 | static inline int deny_valid(u32 x) |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1215 | { |
J. Bruce Fields | 8838dc4 | 2008-01-14 13:12:19 -0500 | [diff] [blame] | 1216 | /* Note: unlike access bits, deny bits may be zero. */ |
| 1217 | return x <= NFS4_SHARE_DENY_BOTH; |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | |
J. Bruce Fields | 4f83aa3 | 2008-07-07 15:02:02 -0400 | [diff] [blame] | 1220 | /* |
| 1221 | * We store the NONE, READ, WRITE, and BOTH bits separately in the |
| 1222 | * st_{access,deny}_bmap field of the stateid, in order to track not |
| 1223 | * only what share bits are currently in force, but also what |
| 1224 | * combinations of share bits previous opens have used. This allows us |
| 1225 | * to enforce the recommendation of rfc 3530 14.2.19 that the server |
| 1226 | * return an error if the client attempt to downgrade to a combination |
| 1227 | * of share bits not explicable by closing some of its previous opens. |
| 1228 | * |
| 1229 | * XXX: This enforcement is actually incomplete, since we don't keep |
| 1230 | * track of access/deny bit combinations; so, e.g., we allow: |
| 1231 | * |
| 1232 | * OPEN allow read, deny write |
| 1233 | * OPEN allow both, deny none |
| 1234 | * DOWNGRADE allow read, deny none |
| 1235 | * |
| 1236 | * which we should reject. |
| 1237 | */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1238 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | set_access(unsigned int *access, unsigned long bmap) { |
| 1240 | int i; |
| 1241 | |
| 1242 | *access = 0; |
| 1243 | for (i = 1; i < 4; i++) { |
| 1244 | if (test_bit(i, &bmap)) |
| 1245 | *access |= i; |
| 1246 | } |
| 1247 | } |
| 1248 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1249 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | set_deny(unsigned int *deny, unsigned long bmap) { |
| 1251 | int i; |
| 1252 | |
| 1253 | *deny = 0; |
| 1254 | for (i = 0; i < 4; i++) { |
| 1255 | if (test_bit(i, &bmap)) |
| 1256 | *deny |= i ; |
| 1257 | } |
| 1258 | } |
| 1259 | |
| 1260 | static int |
| 1261 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { |
| 1262 | unsigned int access, deny; |
| 1263 | |
| 1264 | set_access(&access, stp->st_access_bmap); |
| 1265 | set_deny(&deny, stp->st_deny_bmap); |
| 1266 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
| 1267 | return 0; |
| 1268 | return 1; |
| 1269 | } |
| 1270 | |
| 1271 | /* |
| 1272 | * Called to check deny when READ with all zero stateid or |
| 1273 | * WRITE with all zero or all one stateid |
| 1274 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1275 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
| 1277 | { |
| 1278 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 1279 | struct nfs4_file *fp; |
| 1280 | struct nfs4_stateid *stp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1281 | __be32 ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | |
| 1283 | dprintk("NFSD: nfs4_share_conflict\n"); |
| 1284 | |
| 1285 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1286 | if (!fp) |
| 1287 | return nfs_ok; |
NeilBrown | b700949 | 2005-07-07 17:59:23 -0700 | [diff] [blame] | 1288 | ret = nfserr_locked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | /* Search for conflicting share reservations */ |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1290 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
| 1291 | if (test_bit(deny_type, &stp->st_deny_bmap) || |
| 1292 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) |
| 1293 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1295 | ret = nfs_ok; |
| 1296 | out: |
| 1297 | put_nfs4_file(fp); |
| 1298 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | } |
| 1300 | |
| 1301 | static inline void |
| 1302 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) |
| 1303 | { |
| 1304 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { |
Dave Hansen | aceaf78 | 2008-02-15 14:37:31 -0800 | [diff] [blame] | 1305 | drop_file_write_access(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
| 1307 | } |
| 1308 | } |
| 1309 | |
| 1310 | /* |
| 1311 | * Recall a delegation |
| 1312 | */ |
| 1313 | static int |
| 1314 | do_recall(void *__dp) |
| 1315 | { |
| 1316 | struct nfs4_delegation *dp = __dp; |
| 1317 | |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 1318 | dp->dl_file->fi_had_conflict = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | nfsd4_cb_recall(dp); |
| 1320 | return 0; |
| 1321 | } |
| 1322 | |
| 1323 | /* |
| 1324 | * Spawn a thread to perform a recall on the delegation represented |
| 1325 | * by the lease (file_lock) |
| 1326 | * |
| 1327 | * Called from break_lease() with lock_kernel() held. |
| 1328 | * Note: we assume break_lease will only call this *once* for any given |
| 1329 | * lease. |
| 1330 | */ |
| 1331 | static |
| 1332 | void nfsd_break_deleg_cb(struct file_lock *fl) |
| 1333 | { |
| 1334 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; |
| 1335 | struct task_struct *t; |
| 1336 | |
| 1337 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); |
| 1338 | if (!dp) |
| 1339 | return; |
| 1340 | |
| 1341 | /* We're assuming the state code never drops its reference |
| 1342 | * without first removing the lease. Since we're in this lease |
| 1343 | * callback (and since the lease code is serialized by the kernel |
| 1344 | * lock) we know the server hasn't removed the lease yet, we know |
| 1345 | * it's safe to take a reference: */ |
| 1346 | atomic_inc(&dp->dl_count); |
J. Bruce Fields | cfdcad4 | 2007-09-12 20:35:15 -0400 | [diff] [blame] | 1347 | atomic_inc(&dp->dl_client->cl_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | |
| 1349 | spin_lock(&recall_lock); |
| 1350 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
| 1351 | spin_unlock(&recall_lock); |
| 1352 | |
| 1353 | /* only place dl_time is set. protected by lock_kernel*/ |
| 1354 | dp->dl_time = get_seconds(); |
| 1355 | |
J. Bruce Fields | 0272e1f | 2007-09-12 18:56:12 -0400 | [diff] [blame] | 1356 | /* |
| 1357 | * We don't want the locks code to timeout the lease for us; |
| 1358 | * we'll remove it ourself if the delegation isn't returned |
| 1359 | * in time. |
| 1360 | */ |
| 1361 | fl->fl_break_time = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | |
| 1363 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); |
| 1364 | if (IS_ERR(t)) { |
| 1365 | struct nfs4_client *clp = dp->dl_client; |
| 1366 | |
| 1367 | printk(KERN_INFO "NFSD: Callback thread failed for " |
| 1368 | "for client (clientid %08x/%08x)\n", |
| 1369 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
J. Bruce Fields | cfdcad4 | 2007-09-12 20:35:15 -0400 | [diff] [blame] | 1370 | put_nfs4_client(dp->dl_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | nfs4_put_delegation(dp); |
| 1372 | } |
| 1373 | } |
| 1374 | |
| 1375 | /* |
| 1376 | * The file_lock is being reapd. |
| 1377 | * |
| 1378 | * Called by locks_free_lock() with lock_kernel() held. |
| 1379 | */ |
| 1380 | static |
| 1381 | void nfsd_release_deleg_cb(struct file_lock *fl) |
| 1382 | { |
| 1383 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
| 1384 | |
| 1385 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); |
| 1386 | |
| 1387 | if (!(fl->fl_flags & FL_LEASE) || !dp) |
| 1388 | return; |
| 1389 | dp->dl_flock = NULL; |
| 1390 | } |
| 1391 | |
| 1392 | /* |
| 1393 | * Set the delegation file_lock back pointer. |
| 1394 | * |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 1395 | * Called from setlease() with lock_kernel() held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | */ |
| 1397 | static |
| 1398 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) |
| 1399 | { |
| 1400 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; |
| 1401 | |
| 1402 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); |
| 1403 | if (!dp) |
| 1404 | return; |
| 1405 | dp->dl_flock = new; |
| 1406 | } |
| 1407 | |
| 1408 | /* |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 1409 | * Called from setlease() with lock_kernel() held |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | */ |
| 1411 | static |
| 1412 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) |
| 1413 | { |
| 1414 | struct nfs4_delegation *onlistd = |
| 1415 | (struct nfs4_delegation *)onlist->fl_owner; |
| 1416 | struct nfs4_delegation *tryd = |
| 1417 | (struct nfs4_delegation *)try->fl_owner; |
| 1418 | |
| 1419 | if (onlist->fl_lmops != try->fl_lmops) |
| 1420 | return 0; |
| 1421 | |
| 1422 | return onlistd->dl_client == tryd->dl_client; |
| 1423 | } |
| 1424 | |
| 1425 | |
| 1426 | static |
| 1427 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) |
| 1428 | { |
| 1429 | if (arg & F_UNLCK) |
| 1430 | return lease_modify(onlist, arg); |
| 1431 | else |
| 1432 | return -EAGAIN; |
| 1433 | } |
| 1434 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1435 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | .fl_break = nfsd_break_deleg_cb, |
| 1437 | .fl_release_private = nfsd_release_deleg_cb, |
| 1438 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, |
| 1439 | .fl_mylease = nfsd_same_client_deleg_cb, |
| 1440 | .fl_change = nfsd_change_deleg_cb, |
| 1441 | }; |
| 1442 | |
| 1443 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1444 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | nfsd4_process_open1(struct nfsd4_open *open) |
| 1446 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | clientid_t *clientid = &open->op_clientid; |
| 1448 | struct nfs4_client *clp = NULL; |
| 1449 | unsigned int strhashval; |
| 1450 | struct nfs4_stateowner *sop = NULL; |
| 1451 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | if (!check_name(open->op_owner)) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1453 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | |
| 1455 | if (STALE_CLIENTID(&open->op_clientid)) |
| 1456 | return nfserr_stale_clientid; |
| 1457 | |
| 1458 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); |
| 1459 | sop = find_openstateowner_str(strhashval, open); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1460 | open->op_stateowner = sop; |
| 1461 | if (!sop) { |
| 1462 | /* Make sure the client's lease hasn't expired. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | clp = find_confirmed_client(clientid); |
| 1464 | if (clp == NULL) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1465 | return nfserr_expired; |
| 1466 | goto renew; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | } |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1468 | if (!sop->so_confirmed) { |
| 1469 | /* Replace unconfirmed owners without checking for replay. */ |
| 1470 | clp = sop->so_client; |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 1471 | release_openowner(sop); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1472 | open->op_stateowner = NULL; |
| 1473 | goto renew; |
| 1474 | } |
| 1475 | if (open->op_seqid == sop->so_seqid - 1) { |
| 1476 | if (sop->so_replay.rp_buflen) |
Al Viro | a90b061 | 2006-10-19 23:29:03 -0700 | [diff] [blame] | 1477 | return nfserr_replay_me; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1478 | /* The original OPEN failed so spectacularly |
| 1479 | * that we don't even have replay data saved! |
| 1480 | * Therefore, we have no choice but to continue |
| 1481 | * processing this OPEN; presumably, we'll |
| 1482 | * fail again for the same reason. |
| 1483 | */ |
| 1484 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); |
| 1485 | goto renew; |
| 1486 | } |
| 1487 | if (open->op_seqid != sop->so_seqid) |
| 1488 | return nfserr_bad_seqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | renew: |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1490 | if (open->op_stateowner == NULL) { |
| 1491 | sop = alloc_init_open_stateowner(strhashval, clp, open); |
| 1492 | if (sop == NULL) |
| 1493 | return nfserr_resource; |
| 1494 | open->op_stateowner = sop; |
| 1495 | } |
| 1496 | list_del_init(&sop->so_close_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | renew_client(sop->so_client); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1498 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | } |
| 1500 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1501 | static inline __be32 |
NeilBrown | 4a6e43e | 2005-06-23 22:02:50 -0700 | [diff] [blame] | 1502 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
| 1503 | { |
| 1504 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) |
| 1505 | return nfserr_openmode; |
| 1506 | else |
| 1507 | return nfs_ok; |
| 1508 | } |
| 1509 | |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 1510 | static struct nfs4_delegation * |
| 1511 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) |
| 1512 | { |
| 1513 | struct nfs4_delegation *dp; |
| 1514 | |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1515 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 1516 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
| 1517 | return dp; |
| 1518 | } |
| 1519 | return NULL; |
| 1520 | } |
| 1521 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1522 | static __be32 |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1523 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
| 1524 | struct nfs4_delegation **dp) |
| 1525 | { |
| 1526 | int flags; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1527 | __be32 status = nfserr_bad_stateid; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1528 | |
| 1529 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); |
| 1530 | if (*dp == NULL) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1531 | goto out; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1532 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
| 1533 | RD_STATE : WR_STATE; |
| 1534 | status = nfs4_check_delegmode(*dp, flags); |
| 1535 | if (status) |
| 1536 | *dp = NULL; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1537 | out: |
| 1538 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 1539 | return nfs_ok; |
| 1540 | if (status) |
| 1541 | return status; |
| 1542 | open->op_stateowner->so_confirmed = 1; |
| 1543 | return nfs_ok; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1544 | } |
| 1545 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1546 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
| 1548 | { |
| 1549 | struct nfs4_stateid *local; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1550 | __be32 status = nfserr_share_denied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 1552 | |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1553 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | /* ignore lock owners */ |
| 1555 | if (local->st_stateowner->so_is_open_owner == 0) |
| 1556 | continue; |
| 1557 | /* remember if we have seen this open owner */ |
| 1558 | if (local->st_stateowner == sop) |
| 1559 | *stpp = local; |
| 1560 | /* check for conflicting share reservations */ |
| 1561 | if (!test_share(local, open)) |
| 1562 | goto out; |
| 1563 | } |
| 1564 | status = 0; |
| 1565 | out: |
| 1566 | return status; |
| 1567 | } |
| 1568 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1569 | static inline struct nfs4_stateid * |
| 1570 | nfs4_alloc_stateid(void) |
| 1571 | { |
| 1572 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); |
| 1573 | } |
| 1574 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1575 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1577 | struct nfs4_delegation *dp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | struct svc_fh *cur_fh, int flags) |
| 1579 | { |
| 1580 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1582 | stp = nfs4_alloc_stateid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | if (stp == NULL) |
| 1584 | return nfserr_resource; |
| 1585 | |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1586 | if (dp) { |
| 1587 | get_file(dp->dl_vfs_file); |
| 1588 | stp->st_vfs_file = dp->dl_vfs_file; |
| 1589 | } else { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1590 | __be32 status; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1591 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
| 1592 | &stp->st_vfs_file); |
| 1593 | if (status) { |
| 1594 | if (status == nfserr_dropit) |
| 1595 | status = nfserr_jukebox; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1596 | kmem_cache_free(stateid_slab, stp); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1597 | return status; |
| 1598 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | *stpp = stp; |
| 1601 | return 0; |
| 1602 | } |
| 1603 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1604 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
| 1606 | struct nfsd4_open *open) |
| 1607 | { |
| 1608 | struct iattr iattr = { |
| 1609 | .ia_valid = ATTR_SIZE, |
| 1610 | .ia_size = 0, |
| 1611 | }; |
| 1612 | if (!open->op_truncate) |
| 1613 | return 0; |
| 1614 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
Al Viro | 9246585 | 2006-01-18 17:43:46 -0800 | [diff] [blame] | 1615 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
| 1617 | } |
| 1618 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1619 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
| 1621 | { |
| 1622 | struct file *filp = stp->st_vfs_file; |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 1623 | struct inode *inode = filp->f_path.dentry->d_inode; |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1624 | unsigned int share_access, new_writer; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1625 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | |
| 1627 | set_access(&share_access, stp->st_access_bmap); |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1628 | new_writer = (~share_access) & open->op_share_access |
| 1629 | & NFS4_SHARE_ACCESS_WRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1631 | if (new_writer) { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1632 | int err = get_write_access(inode); |
| 1633 | if (err) |
| 1634 | return nfserrno(err); |
Benny Halevy | e518f05 | 2008-07-04 15:38:41 +0300 | [diff] [blame] | 1635 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
| 1636 | if (err) |
| 1637 | return nfserrno(err); |
| 1638 | file_take_write(filp); |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1639 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | status = nfsd4_truncate(rqstp, cur_fh, open); |
| 1641 | if (status) { |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1642 | if (new_writer) |
| 1643 | put_write_access(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | return status; |
| 1645 | } |
| 1646 | /* remember the open */ |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1647 | filp->f_mode |= open->op_share_access; |
J. Bruce Fields | b55e0ba | 2008-04-28 18:22:50 -0400 | [diff] [blame] | 1648 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
| 1649 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | |
| 1651 | return nfs_ok; |
| 1652 | } |
| 1653 | |
| 1654 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | static void |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 1656 | nfs4_set_claim_prev(struct nfsd4_open *open) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | { |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 1658 | open->op_stateowner->so_confirmed = 1; |
| 1659 | open->op_stateowner->so_client->cl_firststate = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | } |
| 1661 | |
| 1662 | /* |
| 1663 | * Attempt to hand out a delegation. |
| 1664 | */ |
| 1665 | static void |
| 1666 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) |
| 1667 | { |
| 1668 | struct nfs4_delegation *dp; |
| 1669 | struct nfs4_stateowner *sop = stp->st_stateowner; |
| 1670 | struct nfs4_callback *cb = &sop->so_client->cl_callback; |
| 1671 | struct file_lock fl, *flp = &fl; |
| 1672 | int status, flag = 0; |
| 1673 | |
| 1674 | flag = NFS4_OPEN_DELEGATE_NONE; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 1675 | open->op_recall = 0; |
| 1676 | switch (open->op_claim_type) { |
| 1677 | case NFS4_OPEN_CLAIM_PREVIOUS: |
| 1678 | if (!atomic_read(&cb->cb_set)) |
| 1679 | open->op_recall = 1; |
| 1680 | flag = open->op_delegate_type; |
| 1681 | if (flag == NFS4_OPEN_DELEGATE_NONE) |
| 1682 | goto out; |
| 1683 | break; |
| 1684 | case NFS4_OPEN_CLAIM_NULL: |
| 1685 | /* Let's not give out any delegations till everyone's |
| 1686 | * had the chance to reclaim theirs.... */ |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 1687 | if (locks_in_grace()) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 1688 | goto out; |
| 1689 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) |
| 1690 | goto out; |
| 1691 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 1692 | flag = NFS4_OPEN_DELEGATE_WRITE; |
| 1693 | else |
| 1694 | flag = NFS4_OPEN_DELEGATE_READ; |
| 1695 | break; |
| 1696 | default: |
| 1697 | goto out; |
| 1698 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | |
| 1700 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); |
| 1701 | if (dp == NULL) { |
| 1702 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 1703 | goto out; |
| 1704 | } |
| 1705 | locks_init_lock(&fl); |
| 1706 | fl.fl_lmops = &nfsd_lease_mng_ops; |
| 1707 | fl.fl_flags = FL_LEASE; |
Felix Blyakher | 9167f50 | 2008-02-26 10:54:36 -0800 | [diff] [blame] | 1708 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | fl.fl_end = OFFSET_MAX; |
| 1710 | fl.fl_owner = (fl_owner_t)dp; |
| 1711 | fl.fl_file = stp->st_vfs_file; |
| 1712 | fl.fl_pid = current->tgid; |
| 1713 | |
J. Bruce Fields | a9933ce | 2007-06-07 17:09:49 -0400 | [diff] [blame] | 1714 | /* vfs_setlease checks to see if delegation should be handed out. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | * the lock_manager callbacks fl_mylease and fl_change are used |
| 1716 | */ |
Felix Blyakher | 9167f50 | 2008-02-26 10:54:36 -0800 | [diff] [blame] | 1717 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
NeilBrown | c907132 | 2005-04-16 15:26:38 -0700 | [diff] [blame] | 1719 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 1721 | goto out; |
| 1722 | } |
| 1723 | |
| 1724 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); |
| 1725 | |
| 1726 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", |
| 1727 | dp->dl_stateid.si_boot, |
| 1728 | dp->dl_stateid.si_stateownerid, |
| 1729 | dp->dl_stateid.si_fileid, |
| 1730 | dp->dl_stateid.si_generation); |
| 1731 | out: |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 1732 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
| 1733 | && flag == NFS4_OPEN_DELEGATE_NONE |
| 1734 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 1735 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | open->op_delegate_type = flag; |
| 1737 | } |
| 1738 | |
| 1739 | /* |
| 1740 | * called with nfs4_lock_state() held. |
| 1741 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1742 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| 1744 | { |
| 1745 | struct nfs4_file *fp = NULL; |
| 1746 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 1747 | struct nfs4_stateid *stp = NULL; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1748 | struct nfs4_delegation *dp = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1749 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | |
| 1751 | status = nfserr_inval; |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 1752 | if (!access_valid(open->op_share_access) |
| 1753 | || !deny_valid(open->op_share_deny)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | goto out; |
| 1755 | /* |
| 1756 | * Lookup file; if found, lookup stateid and check open request, |
| 1757 | * and check for delegations in the process of being recalled. |
| 1758 | * If not found, create the nfs4_file struct |
| 1759 | */ |
| 1760 | fp = find_file(ino); |
| 1761 | if (fp) { |
| 1762 | if ((status = nfs4_check_open(fp, open, &stp))) |
| 1763 | goto out; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1764 | status = nfs4_check_deleg(fp, open, &dp); |
| 1765 | if (status) |
| 1766 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | } else { |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1768 | status = nfserr_bad_stateid; |
| 1769 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 1770 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | status = nfserr_resource; |
| 1772 | fp = alloc_init_file(ino); |
| 1773 | if (fp == NULL) |
| 1774 | goto out; |
| 1775 | } |
| 1776 | |
| 1777 | /* |
| 1778 | * OPEN the file, or upgrade an existing OPEN. |
| 1779 | * If truncate fails, the OPEN fails. |
| 1780 | */ |
| 1781 | if (stp) { |
| 1782 | /* Stateid was found, this is an OPEN upgrade */ |
| 1783 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); |
| 1784 | if (status) |
| 1785 | goto out; |
NeilBrown | 444c2c0 | 2005-07-07 17:59:22 -0700 | [diff] [blame] | 1786 | update_stateid(&stp->st_stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | } else { |
| 1788 | /* Stateid was not found, this is a new OPEN */ |
| 1789 | int flags = 0; |
J. Bruce Fields | 9ecb6a0 | 2006-06-30 01:56:17 -0700 | [diff] [blame] | 1790 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 1791 | flags |= NFSD_MAY_READ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 1793 | flags |= NFSD_MAY_WRITE; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1794 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
| 1795 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | goto out; |
| 1797 | init_stateid(stp, fp, open); |
| 1798 | status = nfsd4_truncate(rqstp, current_fh, open); |
| 1799 | if (status) { |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 1800 | release_open_stateid(stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | goto out; |
| 1802 | } |
| 1803 | } |
| 1804 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 1805 | |
| 1806 | /* |
| 1807 | * Attempt to hand out a delegation. No error return, because the |
| 1808 | * OPEN succeeds even if we fail. |
| 1809 | */ |
| 1810 | nfs4_open_delegation(current_fh, open, stp); |
| 1811 | |
| 1812 | status = nfs_ok; |
| 1813 | |
| 1814 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", |
| 1815 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, |
| 1816 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); |
| 1817 | out: |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1818 | if (fp) |
| 1819 | put_nfs4_file(fp); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 1820 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
| 1821 | nfs4_set_claim_prev(open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | /* |
| 1823 | * To finish the open response, we just need to set the rflags. |
| 1824 | */ |
| 1825 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; |
| 1826 | if (!open->op_stateowner->so_confirmed) |
| 1827 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
| 1828 | |
| 1829 | return status; |
| 1830 | } |
| 1831 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1832 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 1833 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 1834 | clientid_t *clid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | { |
| 1836 | struct nfs4_client *clp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1837 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | |
| 1839 | nfs4_lock_state(); |
| 1840 | dprintk("process_renew(%08x/%08x): starting\n", |
| 1841 | clid->cl_boot, clid->cl_id); |
| 1842 | status = nfserr_stale_clientid; |
| 1843 | if (STALE_CLIENTID(clid)) |
| 1844 | goto out; |
| 1845 | clp = find_confirmed_client(clid); |
| 1846 | status = nfserr_expired; |
| 1847 | if (clp == NULL) { |
| 1848 | /* We assume the client took too long to RENEW. */ |
| 1849 | dprintk("nfsd4_renew: clientid not found!\n"); |
| 1850 | goto out; |
| 1851 | } |
| 1852 | renew_client(clp); |
| 1853 | status = nfserr_cb_path_down; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1854 | if (!list_empty(&clp->cl_delegations) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | && !atomic_read(&clp->cl_callback.cb_set)) |
| 1856 | goto out; |
| 1857 | status = nfs_ok; |
| 1858 | out: |
| 1859 | nfs4_unlock_state(); |
| 1860 | return status; |
| 1861 | } |
| 1862 | |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 1863 | struct lock_manager nfsd4_manager = { |
| 1864 | }; |
| 1865 | |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 1866 | static void |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 1867 | nfsd4_end_grace(void) |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 1868 | { |
| 1869 | dprintk("NFSD: end of grace period\n"); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 1870 | nfsd4_recdir_purge_old(); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 1871 | locks_end_grace(&nfsd4_manager); |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 1872 | } |
| 1873 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1874 | static time_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | nfs4_laundromat(void) |
| 1876 | { |
| 1877 | struct nfs4_client *clp; |
| 1878 | struct nfs4_stateowner *sop; |
| 1879 | struct nfs4_delegation *dp; |
| 1880 | struct list_head *pos, *next, reaplist; |
| 1881 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; |
| 1882 | time_t t, clientid_val = NFSD_LEASE_TIME; |
| 1883 | time_t u, test_val = NFSD_LEASE_TIME; |
| 1884 | |
| 1885 | nfs4_lock_state(); |
| 1886 | |
| 1887 | dprintk("NFSD: laundromat service - starting\n"); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 1888 | if (locks_in_grace()) |
| 1889 | nfsd4_end_grace(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | list_for_each_safe(pos, next, &client_lru) { |
| 1891 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
| 1892 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { |
| 1893 | t = clp->cl_time - cutoff; |
| 1894 | if (clientid_val > t) |
| 1895 | clientid_val = t; |
| 1896 | break; |
| 1897 | } |
| 1898 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
| 1899 | clp->cl_clientid.cl_id); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 1900 | nfsd4_remove_clid_dir(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | expire_client(clp); |
| 1902 | } |
| 1903 | INIT_LIST_HEAD(&reaplist); |
| 1904 | spin_lock(&recall_lock); |
| 1905 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 1906 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 1907 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
| 1908 | u = dp->dl_time - cutoff; |
| 1909 | if (test_val > u) |
| 1910 | test_val = u; |
| 1911 | break; |
| 1912 | } |
| 1913 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", |
| 1914 | dp, dp->dl_flock); |
| 1915 | list_move(&dp->dl_recall_lru, &reaplist); |
| 1916 | } |
| 1917 | spin_unlock(&recall_lock); |
| 1918 | list_for_each_safe(pos, next, &reaplist) { |
| 1919 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 1920 | list_del_init(&dp->dl_recall_lru); |
| 1921 | unhash_delegation(dp); |
| 1922 | } |
| 1923 | test_val = NFSD_LEASE_TIME; |
| 1924 | list_for_each_safe(pos, next, &close_lru) { |
| 1925 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); |
| 1926 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { |
| 1927 | u = sop->so_time - cutoff; |
| 1928 | if (test_val > u) |
| 1929 | test_val = u; |
| 1930 | break; |
| 1931 | } |
| 1932 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", |
| 1933 | sop->so_id); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 1934 | release_openowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | } |
| 1936 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) |
| 1937 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; |
| 1938 | nfs4_unlock_state(); |
| 1939 | return clientid_val; |
| 1940 | } |
| 1941 | |
Harvey Harrison | a254b24 | 2008-02-20 12:49:00 -0800 | [diff] [blame] | 1942 | static struct workqueue_struct *laundry_wq; |
| 1943 | static void laundromat_main(struct work_struct *); |
| 1944 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); |
| 1945 | |
| 1946 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1947 | laundromat_main(struct work_struct *not_used) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | { |
| 1949 | time_t t; |
| 1950 | |
| 1951 | t = nfs4_laundromat(); |
| 1952 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 1953 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | } |
| 1955 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1956 | static struct nfs4_stateowner * |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 1957 | search_close_lru(u32 st_id, int flags) |
| 1958 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | struct nfs4_stateowner *local = NULL; |
| 1960 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | if (flags & CLOSE_STATE) { |
| 1962 | list_for_each_entry(local, &close_lru, so_close_lru) { |
| 1963 | if (local->so_id == st_id) |
| 1964 | return local; |
| 1965 | } |
| 1966 | } |
| 1967 | return NULL; |
| 1968 | } |
| 1969 | |
| 1970 | static inline int |
| 1971 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) |
| 1972 | { |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 1973 | 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] | 1974 | } |
| 1975 | |
| 1976 | static int |
| 1977 | STALE_STATEID(stateid_t *stateid) |
| 1978 | { |
| 1979 | if (stateid->si_boot == boot_time) |
| 1980 | return 0; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 1981 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
| 1983 | stateid->si_generation); |
| 1984 | return 1; |
| 1985 | } |
| 1986 | |
| 1987 | static inline int |
| 1988 | access_permit_read(unsigned long access_bmap) |
| 1989 | { |
| 1990 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || |
| 1991 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || |
| 1992 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); |
| 1993 | } |
| 1994 | |
| 1995 | static inline int |
| 1996 | access_permit_write(unsigned long access_bmap) |
| 1997 | { |
| 1998 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || |
| 1999 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); |
| 2000 | } |
| 2001 | |
| 2002 | static |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2003 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2005 | __be32 status = nfserr_openmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | |
| 2007 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
| 2008 | goto out; |
| 2009 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) |
| 2010 | goto out; |
| 2011 | status = nfs_ok; |
| 2012 | out: |
| 2013 | return status; |
| 2014 | } |
| 2015 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2016 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
| 2018 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2019 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | return nfs_ok; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2021 | else if (locks_in_grace()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2022 | /* Answer in remaining cases depends on existance of |
| 2023 | * conflicting state; so we must wait out the grace period. */ |
| 2024 | return nfserr_grace; |
| 2025 | } else if (flags & WR_STATE) |
| 2026 | return nfs4_share_conflict(current_fh, |
| 2027 | NFS4_SHARE_DENY_WRITE); |
| 2028 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ |
| 2029 | return nfs4_share_conflict(current_fh, |
| 2030 | NFS4_SHARE_DENY_READ); |
| 2031 | } |
| 2032 | |
| 2033 | /* |
| 2034 | * Allow READ/WRITE during grace period on recovered state only for files |
| 2035 | * that are not able to provide mandatory locking. |
| 2036 | */ |
| 2037 | static inline int |
J. Bruce Fields | 18f8273 | 2009-02-21 15:23:01 -0800 | [diff] [blame] | 2038 | grace_disallows_io(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2040 | return locks_in_grace() && mandatory_lock(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | } |
| 2042 | |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2043 | static int check_stateid_generation(stateid_t *in, stateid_t *ref) |
| 2044 | { |
| 2045 | /* If the client sends us a stateid from the future, it's buggy: */ |
| 2046 | if (in->si_generation > ref->si_generation) |
| 2047 | return nfserr_bad_stateid; |
| 2048 | /* |
| 2049 | * The following, however, can happen. For example, if the |
| 2050 | * client sends an open and some IO at the same time, the open |
| 2051 | * may bump si_generation while the IO is still in flight. |
| 2052 | * Thanks to hard links and renames, the client never knows what |
| 2053 | * file an open will affect. So it could avoid that situation |
| 2054 | * only by serializing all opens and IO from the same open |
| 2055 | * owner. To recover from the old_stateid error, the client |
| 2056 | * will just have to retry the IO: |
| 2057 | */ |
| 2058 | if (in->si_generation < ref->si_generation) |
| 2059 | return nfserr_old_stateid; |
| 2060 | return nfs_ok; |
| 2061 | } |
| 2062 | |
J. Bruce Fields | 3e63307 | 2009-02-21 13:17:19 -0800 | [diff] [blame] | 2063 | static int is_delegation_stateid(stateid_t *stateid) |
| 2064 | { |
| 2065 | return stateid->si_fileid == 0; |
| 2066 | } |
| 2067 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2068 | /* |
| 2069 | * Checks for stateid operations |
| 2070 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2071 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
| 2073 | { |
| 2074 | struct nfs4_stateid *stp = NULL; |
| 2075 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | struct inode *ino = current_fh->fh_dentry->d_inode; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2077 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | if (filpp) |
| 2080 | *filpp = NULL; |
| 2081 | |
J. Bruce Fields | 18f8273 | 2009-02-21 15:23:01 -0800 | [diff] [blame] | 2082 | if (grace_disallows_io(ino)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | return nfserr_grace; |
| 2084 | |
| 2085 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 2086 | return check_special_stateids(current_fh, stateid, flags); |
| 2087 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | status = nfserr_stale_stateid; |
| 2089 | if (STALE_STATEID(stateid)) |
| 2090 | goto out; |
| 2091 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2092 | status = nfserr_bad_stateid; |
J. Bruce Fields | 3e63307 | 2009-02-21 13:17:19 -0800 | [diff] [blame] | 2093 | if (is_delegation_stateid(stateid)) { |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2094 | dp = find_delegation_stateid(ino, stateid); |
J. Bruce Fields | 819a8f5 | 2009-02-21 12:13:24 -0800 | [diff] [blame] | 2095 | if (!dp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2096 | goto out; |
J. Bruce Fields | fd03b09 | 2009-02-21 11:27:30 -0800 | [diff] [blame] | 2097 | status = check_stateid_generation(stateid, &dp->dl_stateid); |
J. Bruce Fields | 0c2a498 | 2009-02-21 11:11:50 -0800 | [diff] [blame] | 2098 | if (status) |
| 2099 | goto out; |
J. Bruce Fields | dc9bf70 | 2009-02-21 11:14:43 -0800 | [diff] [blame] | 2100 | status = nfs4_check_delegmode(dp, flags); |
| 2101 | if (status) |
| 2102 | goto out; |
| 2103 | renew_client(dp->dl_client); |
J. Bruce Fields | dc9bf70 | 2009-02-21 11:14:43 -0800 | [diff] [blame] | 2104 | if (filpp) |
| 2105 | *filpp = dp->dl_vfs_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | } else { /* open or lock stateid */ |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2107 | stp = find_stateid(stateid, flags); |
J. Bruce Fields | 819a8f5 | 2009-02-21 12:13:24 -0800 | [diff] [blame] | 2108 | if (!stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | goto out; |
J. Bruce Fields | 6150ef0 | 2009-02-21 13:36:16 -0800 | [diff] [blame] | 2110 | if (nfs4_check_fh(current_fh, stp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | goto out; |
| 2112 | if (!stp->st_stateowner->so_confirmed) |
| 2113 | goto out; |
J. Bruce Fields | fd03b09 | 2009-02-21 11:27:30 -0800 | [diff] [blame] | 2114 | status = check_stateid_generation(stateid, &stp->st_stateid); |
J. Bruce Fields | 0c2a498 | 2009-02-21 11:11:50 -0800 | [diff] [blame] | 2115 | if (status) |
| 2116 | goto out; |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 2117 | status = nfs4_check_openmode(stp, flags); |
| 2118 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | goto out; |
| 2120 | renew_client(stp->st_stateowner->so_client); |
| 2121 | if (filpp) |
| 2122 | *filpp = stp->st_vfs_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | } |
| 2124 | status = nfs_ok; |
| 2125 | out: |
| 2126 | return status; |
| 2127 | } |
| 2128 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2129 | static inline int |
| 2130 | setlkflg (int type) |
| 2131 | { |
| 2132 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? |
| 2133 | RD_STATE : WR_STATE; |
| 2134 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | |
| 2136 | /* |
| 2137 | * Checks for sequence id mutating operations. |
| 2138 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2139 | static __be32 |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2140 | 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] | 2141 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | struct nfs4_stateid *stp; |
| 2143 | struct nfs4_stateowner *sop; |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2144 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | |
| 2146 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " |
| 2147 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, |
| 2148 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
| 2149 | stateid->si_generation); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2151 | *stpp = NULL; |
| 2152 | *sopp = NULL; |
| 2153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2155 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2156 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | } |
| 2158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | if (STALE_STATEID(stateid)) |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2160 | return nfserr_stale_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | /* |
| 2162 | * We return BAD_STATEID if filehandle doesn't match stateid, |
| 2163 | * the confirmed flag is incorrecly set, or the generation |
| 2164 | * number is incorrect. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | */ |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 2166 | stp = find_stateid(stateid, flags); |
| 2167 | if (stp == NULL) { |
| 2168 | /* |
| 2169 | * Also, we should make sure this isn't just the result of |
| 2170 | * a replayed close: |
| 2171 | */ |
| 2172 | sop = search_close_lru(stateid->si_stateownerid, flags); |
| 2173 | if (sop == NULL) |
| 2174 | return nfserr_bad_stateid; |
| 2175 | *sopp = sop; |
| 2176 | goto check_replay; |
| 2177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | |
J. Bruce Fields | 39325bd | 2007-11-26 17:06:39 -0500 | [diff] [blame] | 2179 | *stpp = stp; |
| 2180 | *sopp = sop = stp->st_stateowner; |
| 2181 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2182 | if (lock) { |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2183 | clientid_t *lockclid = &lock->v.new.clientid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | struct nfs4_client *clp = sop->so_client; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2185 | int lkflg = 0; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2186 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2188 | lkflg = setlkflg(lock->lk_type); |
| 2189 | |
| 2190 | if (lock->lk_is_new) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2191 | if (!sop->so_is_open_owner) |
| 2192 | return nfserr_bad_stateid; |
| 2193 | if (!same_clid(&clp->cl_clientid, lockclid)) |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2194 | return nfserr_bad_stateid; |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2195 | /* stp is the open stateid */ |
| 2196 | status = nfs4_check_openmode(stp, lkflg); |
| 2197 | if (status) |
| 2198 | return status; |
| 2199 | } else { |
| 2200 | /* stp is the lock stateid */ |
| 2201 | status = nfs4_check_openmode(stp->st_openstp, lkflg); |
| 2202 | if (status) |
| 2203 | return status; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2204 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | } |
| 2206 | |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2207 | if (nfs4_check_fh(current_fh, stp)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2208 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2209 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | } |
| 2211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2212 | /* |
| 2213 | * We now validate the seqid and stateid generation numbers. |
| 2214 | * For the moment, we ignore the possibility of |
| 2215 | * generation number wraparound. |
| 2216 | */ |
NeilBrown | bd9aac5 | 2005-07-07 17:59:19 -0700 | [diff] [blame] | 2217 | if (seqid != sop->so_seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | goto check_replay; |
| 2219 | |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2220 | if (sop->so_confirmed && flags & CONFIRM) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2221 | dprintk("NFSD: preprocess_seqid_op: expected" |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2222 | " unconfirmed stateowner!\n"); |
| 2223 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2224 | } |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2225 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2226 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2227 | " confirmed yet!\n"); |
| 2228 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | } |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 2230 | status = check_stateid_generation(stateid, &stp->st_stateid); |
| 2231 | if (status) |
| 2232 | return status; |
NeilBrown | 52fd004 | 2005-07-07 17:59:24 -0700 | [diff] [blame] | 2233 | renew_client(sop->so_client); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2234 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | check_replay: |
NeilBrown | bd9aac5 | 2005-07-07 17:59:19 -0700 | [diff] [blame] | 2237 | if (seqid == sop->so_seqid - 1) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2238 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2239 | /* indicate replay to calling function */ |
Al Viro | a90b061 | 2006-10-19 23:29:03 -0700 | [diff] [blame] | 2240 | return nfserr_replay_me; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2241 | } |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2242 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2243 | sop->so_seqid, seqid); |
| 2244 | *sopp = NULL; |
| 2245 | return nfserr_bad_seqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2246 | } |
| 2247 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2248 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2249 | 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] | 2250 | struct nfsd4_open_confirm *oc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2252 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | struct nfs4_stateowner *sop; |
| 2254 | struct nfs4_stateid *stp; |
| 2255 | |
| 2256 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2257 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 2258 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2260 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
J. Bruce Fields | a8cddc5 | 2006-06-30 01:56:13 -0700 | [diff] [blame] | 2261 | if (status) |
| 2262 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | |
| 2264 | nfs4_lock_state(); |
| 2265 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2266 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
| 2267 | oc->oc_seqid, &oc->oc_req_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2268 | CONFIRM | OPEN_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | &oc->oc_stateowner, &stp, NULL))) |
| 2270 | goto out; |
| 2271 | |
| 2272 | sop = oc->oc_stateowner; |
| 2273 | sop->so_confirmed = 1; |
| 2274 | update_stateid(&stp->st_stateid); |
| 2275 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2276 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " |
| 2277 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, |
| 2278 | stp->st_stateid.si_boot, |
| 2279 | stp->st_stateid.si_stateownerid, |
| 2280 | stp->st_stateid.si_fileid, |
| 2281 | stp->st_stateid.si_generation); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 2282 | |
| 2283 | nfsd4_create_clid_dir(sop->so_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2285 | if (oc->oc_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2286 | nfs4_get_stateowner(oc->oc_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2287 | cstate->replay_owner = oc->oc_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2288 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | nfs4_unlock_state(); |
| 2290 | return status; |
| 2291 | } |
| 2292 | |
| 2293 | |
| 2294 | /* |
| 2295 | * unset all bits in union bitmap (bmap) that |
| 2296 | * do not exist in share (from successful OPEN_DOWNGRADE) |
| 2297 | */ |
| 2298 | static void |
| 2299 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) |
| 2300 | { |
| 2301 | int i; |
| 2302 | for (i = 1; i < 4; i++) { |
| 2303 | if ((i & access) != i) |
| 2304 | __clear_bit(i, bmap); |
| 2305 | } |
| 2306 | } |
| 2307 | |
| 2308 | static void |
| 2309 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) |
| 2310 | { |
| 2311 | int i; |
| 2312 | for (i = 0; i < 4; i++) { |
| 2313 | if ((i & deny) != i) |
| 2314 | __clear_bit(i, bmap); |
| 2315 | } |
| 2316 | } |
| 2317 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2318 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2319 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
| 2320 | struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2321 | struct nfsd4_open_downgrade *od) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2322 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2323 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2324 | struct nfs4_stateid *stp; |
| 2325 | unsigned int share_access; |
| 2326 | |
| 2327 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2328 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 2329 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2330 | |
J. Bruce Fields | ba5a6a1 | 2006-06-30 01:56:16 -0700 | [diff] [blame] | 2331 | if (!access_valid(od->od_share_access) |
| 2332 | || !deny_valid(od->od_share_deny)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2333 | return nfserr_inval; |
| 2334 | |
| 2335 | nfs4_lock_state(); |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2336 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
| 2337 | od->od_seqid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | &od->od_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2339 | OPEN_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2340 | &od->od_stateowner, &stp, NULL))) |
| 2341 | goto out; |
| 2342 | |
| 2343 | status = nfserr_inval; |
| 2344 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { |
| 2345 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", |
| 2346 | stp->st_access_bmap, od->od_share_access); |
| 2347 | goto out; |
| 2348 | } |
| 2349 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { |
| 2350 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
| 2351 | stp->st_deny_bmap, od->od_share_deny); |
| 2352 | goto out; |
| 2353 | } |
| 2354 | set_access(&share_access, stp->st_access_bmap); |
| 2355 | nfs4_file_downgrade(stp->st_vfs_file, |
| 2356 | share_access & ~od->od_share_access); |
| 2357 | |
| 2358 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); |
| 2359 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
| 2360 | |
| 2361 | update_stateid(&stp->st_stateid); |
| 2362 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2363 | status = nfs_ok; |
| 2364 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2365 | if (od->od_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2366 | nfs4_get_stateowner(od->od_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2367 | cstate->replay_owner = od->od_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2368 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2369 | nfs4_unlock_state(); |
| 2370 | return status; |
| 2371 | } |
| 2372 | |
| 2373 | /* |
| 2374 | * nfs4_unlock_state() called after encode |
| 2375 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2376 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2377 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2378 | struct nfsd4_close *close) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2379 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2380 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2381 | struct nfs4_stateid *stp; |
| 2382 | |
| 2383 | dprintk("NFSD: nfsd4_close on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2384 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 2385 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | |
| 2387 | nfs4_lock_state(); |
| 2388 | /* check close_lru for replay */ |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2389 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
| 2390 | close->cl_seqid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | &close->cl_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2392 | OPEN_STATE | CLOSE_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2393 | &close->cl_stateowner, &stp, NULL))) |
| 2394 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | status = nfs_ok; |
| 2396 | update_stateid(&stp->st_stateid); |
| 2397 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2398 | |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 2399 | /* release_stateid() calls nfsd_close() if needed */ |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 2400 | release_open_stateid(stp); |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 2401 | |
| 2402 | /* place unused nfs4_stateowners on so_close_lru list to be |
| 2403 | * released by the laundromat service after the lease period |
| 2404 | * to enable us to handle CLOSE replay |
| 2405 | */ |
| 2406 | if (list_empty(&close->cl_stateowner->so_stateids)) |
| 2407 | move_to_close_lru(close->cl_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2409 | if (close->cl_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2410 | nfs4_get_stateowner(close->cl_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2411 | cstate->replay_owner = close->cl_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2412 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2413 | nfs4_unlock_state(); |
| 2414 | return status; |
| 2415 | } |
| 2416 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2417 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2418 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 2419 | struct nfsd4_delegreturn *dr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2420 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2421 | struct nfs4_delegation *dp; |
| 2422 | stateid_t *stateid = &dr->dr_stateid; |
| 2423 | struct inode *inode; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2424 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2425 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2426 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2427 | return status; |
| 2428 | inode = cstate->current_fh.fh_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | |
| 2430 | nfs4_lock_state(); |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2431 | status = nfserr_bad_stateid; |
| 2432 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 2433 | goto out; |
| 2434 | status = nfserr_stale_stateid; |
| 2435 | if (STALE_STATEID(stateid)) |
| 2436 | goto out; |
J. Bruce Fields | 7e0f7cf | 2009-02-21 13:32:28 -0800 | [diff] [blame] | 2437 | status = nfserr_bad_stateid; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2438 | if (!is_delegation_stateid(stateid)) |
| 2439 | goto out; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2440 | dp = find_delegation_stateid(inode, stateid); |
| 2441 | if (!dp) |
| 2442 | goto out; |
| 2443 | status = check_stateid_generation(stateid, &dp->dl_stateid); |
| 2444 | if (status) |
| 2445 | goto out; |
| 2446 | renew_client(dp->dl_client); |
| 2447 | |
| 2448 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2449 | out: |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 2450 | nfs4_unlock_state(); |
| 2451 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2452 | return status; |
| 2453 | } |
| 2454 | |
| 2455 | |
| 2456 | /* |
| 2457 | * Lock owner state (byte-range locks) |
| 2458 | */ |
| 2459 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
| 2460 | #define LOCK_HASH_BITS 8 |
| 2461 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) |
| 2462 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) |
| 2463 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2464 | static inline u64 |
| 2465 | end_offset(u64 start, u64 len) |
| 2466 | { |
| 2467 | u64 end; |
| 2468 | |
| 2469 | end = start + len; |
| 2470 | return end >= start ? end: NFS4_MAX_UINT64; |
| 2471 | } |
| 2472 | |
| 2473 | /* last octet in a range */ |
| 2474 | static inline u64 |
| 2475 | last_byte_offset(u64 start, u64 len) |
| 2476 | { |
| 2477 | u64 end; |
| 2478 | |
| 2479 | BUG_ON(!len); |
| 2480 | end = start + len; |
| 2481 | return end > start ? end - 1: NFS4_MAX_UINT64; |
| 2482 | } |
| 2483 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2484 | #define lockownerid_hashval(id) \ |
| 2485 | ((id) & LOCK_HASH_MASK) |
| 2486 | |
| 2487 | static inline unsigned int |
| 2488 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, |
| 2489 | struct xdr_netobj *ownername) |
| 2490 | { |
| 2491 | return (file_hashval(inode) + cl_id |
| 2492 | + opaque_hashval(ownername->data, ownername->len)) |
| 2493 | & LOCK_HASH_MASK; |
| 2494 | } |
| 2495 | |
| 2496 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; |
| 2497 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; |
| 2498 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; |
| 2499 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2500 | static struct nfs4_stateid * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2501 | find_stateid(stateid_t *stid, int flags) |
| 2502 | { |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 2503 | struct nfs4_stateid *local; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2504 | u32 st_id = stid->si_stateownerid; |
| 2505 | u32 f_id = stid->si_fileid; |
| 2506 | unsigned int hashval; |
| 2507 | |
| 2508 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 2509 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2510 | hashval = stateid_hashval(st_id, f_id); |
| 2511 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { |
| 2512 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 2513 | (local->st_stateid.si_fileid == f_id)) |
| 2514 | return local; |
| 2515 | } |
| 2516 | } |
Krishna Kumar | 9346eff | 2008-10-20 11:44:28 +0530 | [diff] [blame] | 2517 | |
| 2518 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2519 | hashval = stateid_hashval(st_id, f_id); |
| 2520 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { |
| 2521 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 2522 | (local->st_stateid.si_fileid == f_id)) |
| 2523 | return local; |
| 2524 | } |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2525 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2526 | return NULL; |
| 2527 | } |
| 2528 | |
| 2529 | static struct nfs4_delegation * |
| 2530 | find_delegation_stateid(struct inode *ino, stateid_t *stid) |
| 2531 | { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2532 | struct nfs4_file *fp; |
| 2533 | struct nfs4_delegation *dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2534 | |
| 2535 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", |
| 2536 | stid->si_boot, stid->si_stateownerid, |
| 2537 | stid->si_fileid, stid->si_generation); |
| 2538 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2540 | if (!fp) |
| 2541 | return NULL; |
| 2542 | dl = find_delegation_file(fp, stid); |
| 2543 | put_nfs4_file(fp); |
| 2544 | return dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | } |
| 2546 | |
| 2547 | /* |
| 2548 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that |
| 2549 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th |
| 2550 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit |
| 2551 | * locking, this prevents us from being completely protocol-compliant. The |
| 2552 | * real solution to this problem is to start using unsigned file offsets in |
| 2553 | * the VFS, but this is a very deep change! |
| 2554 | */ |
| 2555 | static inline void |
| 2556 | nfs4_transform_lock_offset(struct file_lock *lock) |
| 2557 | { |
| 2558 | if (lock->fl_start < 0) |
| 2559 | lock->fl_start = OFFSET_MAX; |
| 2560 | if (lock->fl_end < 0) |
| 2561 | lock->fl_end = OFFSET_MAX; |
| 2562 | } |
| 2563 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2564 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
| 2565 | * as a unique cookie to identify our (NFSv4's) posix locks. */ |
Adrian Bunk | e465a77 | 2006-04-10 22:55:23 -0700 | [diff] [blame] | 2566 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2567 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2568 | |
| 2569 | static inline void |
| 2570 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) |
| 2571 | { |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2572 | struct nfs4_stateowner *sop; |
| 2573 | unsigned int hval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2574 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2575 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
| 2576 | sop = (struct nfs4_stateowner *) fl->fl_owner; |
| 2577 | hval = lockownerid_hashval(sop->so_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | kref_get(&sop->so_ref); |
| 2579 | deny->ld_sop = sop; |
| 2580 | deny->ld_clientid = sop->so_client->cl_clientid; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2581 | } else { |
| 2582 | deny->ld_sop = NULL; |
| 2583 | deny->ld_clientid.cl_boot = 0; |
| 2584 | deny->ld_clientid.cl_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2585 | } |
| 2586 | deny->ld_start = fl->fl_start; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2587 | deny->ld_length = NFS4_MAX_UINT64; |
| 2588 | if (fl->fl_end != NFS4_MAX_UINT64) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
| 2590 | deny->ld_type = NFS4_READ_LT; |
| 2591 | if (fl->fl_type != F_RDLCK) |
| 2592 | deny->ld_type = NFS4_WRITE_LT; |
| 2593 | } |
| 2594 | |
| 2595 | static struct nfs4_stateowner * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, |
| 2597 | struct xdr_netobj *owner) |
| 2598 | { |
| 2599 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); |
| 2600 | struct nfs4_stateowner *op; |
| 2601 | |
| 2602 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2603 | if (same_owner_str(op, owner, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | return op; |
| 2605 | } |
| 2606 | return NULL; |
| 2607 | } |
| 2608 | |
| 2609 | /* |
| 2610 | * Alloc a lock owner structure. |
| 2611 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has |
| 2612 | * occured. |
| 2613 | * |
| 2614 | * strhashval = lock_ownerstr_hashval |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2615 | */ |
| 2616 | |
| 2617 | static struct nfs4_stateowner * |
| 2618 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { |
| 2619 | struct nfs4_stateowner *sop; |
| 2620 | struct nfs4_replay *rp; |
| 2621 | unsigned int idhashval; |
| 2622 | |
| 2623 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) |
| 2624 | return NULL; |
| 2625 | idhashval = lockownerid_hashval(current_ownerid); |
| 2626 | INIT_LIST_HEAD(&sop->so_idhash); |
| 2627 | INIT_LIST_HEAD(&sop->so_strhash); |
| 2628 | INIT_LIST_HEAD(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2629 | INIT_LIST_HEAD(&sop->so_stateids); |
| 2630 | INIT_LIST_HEAD(&sop->so_perstateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2631 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
| 2632 | sop->so_time = 0; |
| 2633 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); |
| 2634 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2635 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | sop->so_is_open_owner = 0; |
| 2637 | sop->so_id = current_ownerid++; |
| 2638 | sop->so_client = clp; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2639 | /* It is the openowner seqid that will be incremented in encode in the |
| 2640 | * case of new lockowners; so increment the lock seqid manually: */ |
| 2641 | sop->so_seqid = lock->lk_new_lock_seqid + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2642 | sop->so_confirmed = 1; |
| 2643 | rp = &sop->so_replay; |
Al Viro | de1ae28 | 2006-01-18 17:43:47 -0800 | [diff] [blame] | 2644 | rp->rp_status = nfserr_serverfault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2645 | rp->rp_buflen = 0; |
| 2646 | rp->rp_buf = rp->rp_ibuf; |
| 2647 | return sop; |
| 2648 | } |
| 2649 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2650 | static struct nfs4_stateid * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2651 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
| 2652 | { |
| 2653 | struct nfs4_stateid *stp; |
| 2654 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 2655 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2656 | stp = nfs4_alloc_stateid(); |
| 2657 | if (stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2658 | goto out; |
| 2659 | INIT_LIST_HEAD(&stp->st_hash); |
| 2660 | INIT_LIST_HEAD(&stp->st_perfile); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2661 | INIT_LIST_HEAD(&stp->st_perstateowner); |
| 2662 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 2664 | list_add(&stp->st_perfile, &fp->fi_stateids); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2665 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2666 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2667 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2668 | stp->st_file = fp; |
| 2669 | stp->st_stateid.si_boot = boot_time; |
| 2670 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 2671 | stp->st_stateid.si_fileid = fp->fi_id; |
| 2672 | stp->st_stateid.si_generation = 0; |
| 2673 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ |
| 2674 | stp->st_access_bmap = open_stp->st_access_bmap; |
| 2675 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2676 | stp->st_openstp = open_stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2677 | |
| 2678 | out: |
| 2679 | return stp; |
| 2680 | } |
| 2681 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2682 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2683 | check_lock_length(u64 offset, u64 length) |
| 2684 | { |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2685 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | LOFF_OVERFLOW(offset, length))); |
| 2687 | } |
| 2688 | |
| 2689 | /* |
| 2690 | * LOCK operation |
| 2691 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2692 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2693 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2694 | struct nfsd4_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2695 | { |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 2696 | struct nfs4_stateowner *open_sop = NULL; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2697 | struct nfs4_stateowner *lock_sop = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2698 | struct nfs4_stateid *lock_stp; |
| 2699 | struct file *filp; |
| 2700 | struct file_lock file_lock; |
Andy Adamson | 8dc7c31 | 2006-03-20 13:44:26 -0500 | [diff] [blame] | 2701 | struct file_lock conflock; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2702 | __be32 status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | unsigned int strhashval; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 2704 | unsigned int cmd; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2705 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2706 | |
| 2707 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", |
| 2708 | (long long) lock->lk_offset, |
| 2709 | (long long) lock->lk_length); |
| 2710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2711 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
| 2712 | return nfserr_inval; |
| 2713 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2714 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 2715 | S_IFREG, NFSD_MAY_LOCK))) { |
Andy Adamson | a6f6ef2 | 2006-01-18 17:43:17 -0800 | [diff] [blame] | 2716 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
| 2717 | return status; |
| 2718 | } |
| 2719 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2720 | nfs4_lock_state(); |
| 2721 | |
| 2722 | if (lock->lk_is_new) { |
NeilBrown | 893f877 | 2005-07-07 17:59:17 -0700 | [diff] [blame] | 2723 | /* |
| 2724 | * Client indicates that this is a new lockowner. |
| 2725 | * Use open owner and open stateid to create lock owner and |
| 2726 | * lock stateid. |
| 2727 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2728 | struct nfs4_stateid *open_stp = NULL; |
| 2729 | struct nfs4_file *fp; |
| 2730 | |
| 2731 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2732 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2734 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2735 | /* validate and update open stateid and open seqid */ |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2736 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2737 | lock->lk_new_open_seqid, |
| 2738 | &lock->lk_new_open_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2739 | OPEN_STATE, |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2740 | &lock->lk_replay_owner, &open_stp, |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2741 | lock); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 2742 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2743 | goto out; |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2744 | open_sop = lock->lk_replay_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2745 | /* create lockowner and lock stateid */ |
| 2746 | fp = open_stp->st_file; |
| 2747 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
| 2748 | open_sop->so_client->cl_clientid.cl_id, |
| 2749 | &lock->v.new.owner); |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 2750 | /* XXX: Do we need to check for duplicate stateowners on |
| 2751 | * the same file, or should they just be allowed (and |
| 2752 | * create new stateids)? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2753 | status = nfserr_resource; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2754 | lock_sop = alloc_init_lock_stateowner(strhashval, |
| 2755 | open_sop->so_client, open_stp, lock); |
| 2756 | if (lock_sop == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | goto out; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2758 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
J. Bruce Fields | 8a28051 | 2006-01-18 17:43:18 -0800 | [diff] [blame] | 2759 | if (lock_stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2760 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2761 | } else { |
| 2762 | /* lock (lock owner + lock stateid) already exists */ |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2763 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2764 | lock->lk_old_lock_seqid, |
| 2765 | &lock->lk_old_lock_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2766 | LOCK_STATE, |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2767 | &lock->lk_replay_owner, &lock_stp, lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2768 | if (status) |
| 2769 | goto out; |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2770 | lock_sop = lock->lk_replay_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | } |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2772 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | filp = lock_stp->st_vfs_file; |
| 2774 | |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 2775 | status = nfserr_grace; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2776 | if (locks_in_grace() && !lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 2777 | goto out; |
| 2778 | status = nfserr_no_grace; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2779 | if (!locks_in_grace() && lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 2780 | goto out; |
| 2781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2782 | locks_init_lock(&file_lock); |
| 2783 | switch (lock->lk_type) { |
| 2784 | case NFS4_READ_LT: |
| 2785 | case NFS4_READW_LT: |
| 2786 | file_lock.fl_type = F_RDLCK; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 2787 | cmd = F_SETLK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2788 | break; |
| 2789 | case NFS4_WRITE_LT: |
| 2790 | case NFS4_WRITEW_LT: |
| 2791 | file_lock.fl_type = F_WRLCK; |
Marc Eshel | 150b393 | 2007-01-18 16:15:35 -0500 | [diff] [blame] | 2792 | cmd = F_SETLK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2793 | break; |
| 2794 | default: |
| 2795 | status = nfserr_inval; |
| 2796 | goto out; |
| 2797 | } |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2798 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | file_lock.fl_pid = current->tgid; |
| 2800 | file_lock.fl_file = filp; |
| 2801 | file_lock.fl_flags = FL_POSIX; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2802 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2803 | |
| 2804 | file_lock.fl_start = lock->lk_offset; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2805 | 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] | 2806 | nfs4_transform_lock_offset(&file_lock); |
| 2807 | |
| 2808 | /* |
| 2809 | * Try to lock the file in the VFS. |
| 2810 | * Note: locks.c uses the BKL to protect the inode's lock list. |
| 2811 | */ |
| 2812 | |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2813 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2814 | switch (-err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2815 | case 0: /* success! */ |
| 2816 | update_stateid(&lock_stp->st_stateid); |
| 2817 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, |
| 2818 | sizeof(stateid_t)); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2819 | status = 0; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 2820 | break; |
| 2821 | case (EAGAIN): /* conflock holds conflicting lock */ |
| 2822 | status = nfserr_denied; |
| 2823 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); |
| 2824 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); |
| 2825 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | case (EDEADLK): |
| 2827 | status = nfserr_deadlock; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 2828 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2829 | default: |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2830 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 2831 | status = nfserr_resource; |
| 2832 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2833 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2834 | out: |
J. Bruce Fields | 8a28051 | 2006-01-18 17:43:18 -0800 | [diff] [blame] | 2835 | if (status && lock->lk_is_new && lock_sop) |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 2836 | release_lockowner(lock_sop); |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2837 | if (lock->lk_replay_owner) { |
| 2838 | nfs4_get_stateowner(lock->lk_replay_owner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2839 | cstate->replay_owner = lock->lk_replay_owner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2840 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2841 | nfs4_unlock_state(); |
| 2842 | return status; |
| 2843 | } |
| 2844 | |
| 2845 | /* |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 2846 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, |
| 2847 | * so we do a temporary open here just to get an open file to pass to |
| 2848 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an |
| 2849 | * inode operation.) |
| 2850 | */ |
| 2851 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
| 2852 | { |
| 2853 | struct file *file; |
| 2854 | int err; |
| 2855 | |
| 2856 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
| 2857 | if (err) |
| 2858 | return err; |
| 2859 | err = vfs_test_lock(file, lock); |
| 2860 | nfsd_close(file); |
| 2861 | return err; |
| 2862 | } |
| 2863 | |
| 2864 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2865 | * LOCKT operation |
| 2866 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2867 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2868 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 2869 | struct nfsd4_lockt *lockt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2870 | { |
| 2871 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2872 | struct file_lock file_lock; |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2873 | int error; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2874 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2875 | |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2876 | if (locks_in_grace()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2877 | return nfserr_grace; |
| 2878 | |
| 2879 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) |
| 2880 | return nfserr_inval; |
| 2881 | |
| 2882 | lockt->lt_stateowner = NULL; |
| 2883 | nfs4_lock_state(); |
| 2884 | |
| 2885 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2886 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2887 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2888 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2889 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2890 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | if (status == nfserr_symlink) |
| 2892 | status = nfserr_inval; |
| 2893 | goto out; |
| 2894 | } |
| 2895 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2896 | inode = cstate->current_fh.fh_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2897 | locks_init_lock(&file_lock); |
| 2898 | switch (lockt->lt_type) { |
| 2899 | case NFS4_READ_LT: |
| 2900 | case NFS4_READW_LT: |
| 2901 | file_lock.fl_type = F_RDLCK; |
| 2902 | break; |
| 2903 | case NFS4_WRITE_LT: |
| 2904 | case NFS4_WRITEW_LT: |
| 2905 | file_lock.fl_type = F_WRLCK; |
| 2906 | break; |
| 2907 | default: |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 2908 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2909 | status = nfserr_inval; |
| 2910 | goto out; |
| 2911 | } |
| 2912 | |
| 2913 | lockt->lt_stateowner = find_lockstateowner_str(inode, |
| 2914 | &lockt->lt_clientid, &lockt->lt_owner); |
| 2915 | if (lockt->lt_stateowner) |
| 2916 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; |
| 2917 | file_lock.fl_pid = current->tgid; |
| 2918 | file_lock.fl_flags = FL_POSIX; |
| 2919 | |
| 2920 | file_lock.fl_start = lockt->lt_offset; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2921 | 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] | 2922 | |
| 2923 | nfs4_transform_lock_offset(&file_lock); |
| 2924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2925 | status = nfs_ok; |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 2926 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2927 | if (error) { |
| 2928 | status = nfserrno(error); |
| 2929 | goto out; |
| 2930 | } |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 2931 | if (file_lock.fl_type != F_UNLCK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2932 | status = nfserr_denied; |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 2933 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2934 | } |
| 2935 | out: |
| 2936 | nfs4_unlock_state(); |
| 2937 | return status; |
| 2938 | } |
| 2939 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2940 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2941 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2942 | struct nfsd4_locku *locku) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2943 | { |
| 2944 | struct nfs4_stateid *stp; |
| 2945 | struct file *filp = NULL; |
| 2946 | struct file_lock file_lock; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2947 | __be32 status; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2948 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2949 | |
| 2950 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
| 2951 | (long long) locku->lu_offset, |
| 2952 | (long long) locku->lu_length); |
| 2953 | |
| 2954 | if (check_lock_length(locku->lu_offset, locku->lu_length)) |
| 2955 | return nfserr_inval; |
| 2956 | |
| 2957 | nfs4_lock_state(); |
| 2958 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 2959 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2960 | locku->lu_seqid, |
| 2961 | &locku->lu_stateid, |
J. Bruce Fields | f336273 | 2008-01-26 14:58:45 -0500 | [diff] [blame] | 2962 | LOCK_STATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2963 | &locku->lu_stateowner, &stp, NULL))) |
| 2964 | goto out; |
| 2965 | |
| 2966 | filp = stp->st_vfs_file; |
| 2967 | BUG_ON(!filp); |
| 2968 | locks_init_lock(&file_lock); |
| 2969 | file_lock.fl_type = F_UNLCK; |
| 2970 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; |
| 2971 | file_lock.fl_pid = current->tgid; |
| 2972 | file_lock.fl_file = filp; |
| 2973 | file_lock.fl_flags = FL_POSIX; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 2974 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2975 | file_lock.fl_start = locku->lu_offset; |
| 2976 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 2977 | 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] | 2978 | nfs4_transform_lock_offset(&file_lock); |
| 2979 | |
| 2980 | /* |
| 2981 | * Try to unlock the file in the VFS. |
| 2982 | */ |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2983 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 2984 | if (err) { |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 2985 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2986 | goto out_nfserr; |
| 2987 | } |
| 2988 | /* |
| 2989 | * OK, unlock succeeded; the only thing left to do is update the stateid. |
| 2990 | */ |
| 2991 | update_stateid(&stp->st_stateid); |
| 2992 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2993 | |
| 2994 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2995 | if (locku->lu_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2996 | nfs4_get_stateowner(locku->lu_stateowner); |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 2997 | cstate->replay_owner = locku->lu_stateowner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2998 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2999 | nfs4_unlock_state(); |
| 3000 | return status; |
| 3001 | |
| 3002 | out_nfserr: |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 3003 | status = nfserrno(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3004 | goto out; |
| 3005 | } |
| 3006 | |
| 3007 | /* |
| 3008 | * returns |
| 3009 | * 1: locks held by lockowner |
| 3010 | * 0: no locks held by lockowner |
| 3011 | */ |
| 3012 | static int |
| 3013 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) |
| 3014 | { |
| 3015 | struct file_lock **flpp; |
Josef "Jeff" Sipek | 7eaa36e | 2006-12-08 02:36:41 -0800 | [diff] [blame] | 3016 | struct inode *inode = filp->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3017 | int status = 0; |
| 3018 | |
| 3019 | lock_kernel(); |
| 3020 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 3021 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | status = 1; |
| 3023 | goto out; |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 3024 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3025 | } |
| 3026 | out: |
| 3027 | unlock_kernel(); |
| 3028 | return status; |
| 3029 | } |
| 3030 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3031 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 3032 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
| 3033 | struct nfsd4_compound_state *cstate, |
| 3034 | struct nfsd4_release_lockowner *rlockowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3035 | { |
| 3036 | clientid_t *clid = &rlockowner->rl_clientid; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3037 | struct nfs4_stateowner *sop; |
| 3038 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3039 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3040 | struct list_head matches; |
| 3041 | int i; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3042 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3043 | |
| 3044 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", |
| 3045 | clid->cl_boot, clid->cl_id); |
| 3046 | |
| 3047 | /* XXX check for lease expiration */ |
| 3048 | |
| 3049 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 3050 | if (STALE_CLIENTID(clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3051 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3052 | |
| 3053 | nfs4_lock_state(); |
| 3054 | |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3055 | status = nfserr_locks_held; |
| 3056 | /* XXX: we're doing a linear search through all the lockowners. |
| 3057 | * Yipes! For now we'll just hope clients aren't really using |
| 3058 | * release_lockowner much, but eventually we have to fix these |
| 3059 | * data structures. */ |
| 3060 | INIT_LIST_HEAD(&matches); |
| 3061 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 3062 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 3063 | if (!same_owner_str(sop, owner, clid)) |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3064 | continue; |
| 3065 | list_for_each_entry(stp, &sop->so_stateids, |
| 3066 | st_perstateowner) { |
| 3067 | if (check_for_locks(stp->st_vfs_file, sop)) |
| 3068 | goto out; |
| 3069 | /* Note: so_perclient unused for lockowners, |
| 3070 | * so it's OK to fool with here. */ |
| 3071 | list_add(&sop->so_perclient, &matches); |
| 3072 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3073 | } |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3074 | } |
| 3075 | /* Clients probably won't expect us to return with some (but not all) |
| 3076 | * of the lockowner state released; so don't release any until all |
| 3077 | * have been checked. */ |
| 3078 | status = nfs_ok; |
NeilBrown | 0fa822e | 2005-07-07 17:59:14 -0700 | [diff] [blame] | 3079 | while (!list_empty(&matches)) { |
| 3080 | sop = list_entry(matches.next, struct nfs4_stateowner, |
| 3081 | so_perclient); |
| 3082 | /* unhash_stateowner deletes so_perclient only |
| 3083 | * for openowners. */ |
| 3084 | list_del(&sop->so_perclient); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 3085 | release_lockowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3086 | } |
| 3087 | out: |
| 3088 | nfs4_unlock_state(); |
| 3089 | return status; |
| 3090 | } |
| 3091 | |
| 3092 | static inline struct nfs4_client_reclaim * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3093 | alloc_reclaim(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3094 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3095 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3096 | } |
| 3097 | |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3098 | int |
| 3099 | nfs4_has_reclaimed_state(const char *name) |
| 3100 | { |
| 3101 | unsigned int strhashval = clientstr_hashval(name); |
| 3102 | struct nfs4_client *clp; |
| 3103 | |
| 3104 | clp = find_confirmed_client_by_str(name, strhashval); |
| 3105 | return clp ? 1 : 0; |
| 3106 | } |
| 3107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3108 | /* |
| 3109 | * failure => all reset bets are off, nfserr_no_grace... |
| 3110 | */ |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3111 | int |
| 3112 | nfs4_client_to_reclaim(const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3113 | { |
| 3114 | unsigned int strhashval; |
| 3115 | struct nfs4_client_reclaim *crp = NULL; |
| 3116 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3117 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
| 3118 | crp = alloc_reclaim(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3119 | if (!crp) |
| 3120 | return 0; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3121 | strhashval = clientstr_hashval(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3122 | INIT_LIST_HEAD(&crp->cr_strhash); |
| 3123 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3124 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3125 | reclaim_str_hashtbl_size++; |
| 3126 | return 1; |
| 3127 | } |
| 3128 | |
| 3129 | static void |
| 3130 | nfs4_release_reclaim(void) |
| 3131 | { |
| 3132 | struct nfs4_client_reclaim *crp = NULL; |
| 3133 | int i; |
| 3134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3135 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3136 | while (!list_empty(&reclaim_str_hashtbl[i])) { |
| 3137 | crp = list_entry(reclaim_str_hashtbl[i].next, |
| 3138 | struct nfs4_client_reclaim, cr_strhash); |
| 3139 | list_del(&crp->cr_strhash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3140 | kfree(crp); |
| 3141 | reclaim_str_hashtbl_size--; |
| 3142 | } |
| 3143 | } |
| 3144 | BUG_ON(reclaim_str_hashtbl_size); |
| 3145 | } |
| 3146 | |
| 3147 | /* |
| 3148 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3149 | static struct nfs4_client_reclaim * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3150 | nfs4_find_reclaim_client(clientid_t *clid) |
| 3151 | { |
| 3152 | unsigned int strhashval; |
| 3153 | struct nfs4_client *clp; |
| 3154 | struct nfs4_client_reclaim *crp = NULL; |
| 3155 | |
| 3156 | |
| 3157 | /* find clientid in conf_id_hashtbl */ |
| 3158 | clp = find_confirmed_client(clid); |
| 3159 | if (clp == NULL) |
| 3160 | return NULL; |
| 3161 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3162 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
| 3163 | clp->cl_name.len, clp->cl_name.data, |
| 3164 | clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3165 | |
| 3166 | /* find clp->cl_name in reclaim_str_hashtbl */ |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3167 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3168 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3169 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3170 | return crp; |
| 3171 | } |
| 3172 | } |
| 3173 | return NULL; |
| 3174 | } |
| 3175 | |
| 3176 | /* |
| 3177 | * Called from OPEN. Look for clientid in reclaim list. |
| 3178 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3179 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3180 | nfs4_check_open_reclaim(clientid_t *clid) |
| 3181 | { |
NeilBrown | dfc8356 | 2005-06-23 22:03:16 -0700 | [diff] [blame] | 3182 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3183 | } |
| 3184 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3185 | /* initialization to perform at module load time: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3186 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3187 | int |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3188 | nfs4_state_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3189 | { |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3190 | int i, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3191 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3192 | status = nfsd4_init_slabs(); |
| 3193 | if (status) |
| 3194 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3195 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3196 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); |
| 3197 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); |
| 3198 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); |
| 3199 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); |
| 3200 | } |
| 3201 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
| 3202 | INIT_LIST_HEAD(&file_hashtbl[i]); |
| 3203 | } |
| 3204 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
| 3205 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); |
| 3206 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); |
| 3207 | } |
| 3208 | for (i = 0; i < STATEID_HASH_SIZE; i++) { |
| 3209 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
| 3210 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); |
| 3211 | } |
| 3212 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 3213 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); |
| 3214 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); |
| 3215 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3216 | memset(&onestateid, ~0, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3217 | INIT_LIST_HEAD(&close_lru); |
| 3218 | INIT_LIST_HEAD(&client_lru); |
| 3219 | INIT_LIST_HEAD(&del_recall_lru); |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3220 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
| 3221 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
| 3222 | reclaim_str_hashtbl_size = 0; |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3223 | return 0; |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3224 | } |
| 3225 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3226 | static void |
| 3227 | nfsd4_load_reboot_recovery_data(void) |
| 3228 | { |
| 3229 | int status; |
| 3230 | |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3231 | nfs4_lock_state(); |
| 3232 | nfsd4_init_recdir(user_recovery_dirname); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3233 | status = nfsd4_recdir_load(); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3234 | nfs4_unlock_state(); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3235 | if (status) |
| 3236 | printk("NFSD: Failure reading reboot recovery data\n"); |
| 3237 | } |
| 3238 | |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 3239 | unsigned long |
| 3240 | get_nfs4_grace_period(void) |
| 3241 | { |
| 3242 | return max(user_lease_time, lease_time) * HZ; |
| 3243 | } |
| 3244 | |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 3245 | /* |
| 3246 | * Since the lifetime of a delegation isn't limited to that of an open, a |
| 3247 | * client may quite reasonably hang on to a delegation as long as it has |
| 3248 | * the inode cached. This becomes an obvious problem the first time a |
| 3249 | * client's inode cache approaches the size of the server's total memory. |
| 3250 | * |
| 3251 | * For now we avoid this problem by imposing a hard limit on the number |
| 3252 | * of delegations, which varies according to the server's memory size. |
| 3253 | */ |
| 3254 | static void |
| 3255 | set_max_delegations(void) |
| 3256 | { |
| 3257 | /* |
| 3258 | * Allow at most 4 delegations per megabyte of RAM. Quick |
| 3259 | * estimates suggest that in the worst case (where every delegation |
| 3260 | * is for a different inode), a delegation could take about 1.5K, |
| 3261 | * giving a worst case usage of about 6% of memory. |
| 3262 | */ |
| 3263 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); |
| 3264 | } |
| 3265 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3266 | /* initialization to perform when the nfsd service is started: */ |
| 3267 | |
| 3268 | static void |
| 3269 | __nfs4_state_start(void) |
| 3270 | { |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 3271 | unsigned long grace_time; |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3272 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3273 | boot_time = get_seconds(); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3274 | grace_time = get_nfs4_grace_period(); |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3275 | lease_time = user_lease_time; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3276 | locks_start_grace(&nfsd4_manager); |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 3277 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
| 3278 | grace_time/HZ); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 3279 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 3280 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 3281 | set_max_delegations(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3282 | } |
| 3283 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3284 | void |
NeilBrown | 76a3550 | 2005-06-23 22:03:26 -0700 | [diff] [blame] | 3285 | nfs4_state_start(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3286 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3287 | if (nfs4_init) |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3288 | return; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3289 | nfsd4_load_reboot_recovery_data(); |
NeilBrown | 76a3550 | 2005-06-23 22:03:26 -0700 | [diff] [blame] | 3290 | __nfs4_state_start(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3291 | nfs4_init = 1; |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3292 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3293 | } |
| 3294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3295 | time_t |
| 3296 | nfs4_lease_time(void) |
| 3297 | { |
| 3298 | return lease_time; |
| 3299 | } |
| 3300 | |
| 3301 | static void |
| 3302 | __nfs4_state_shutdown(void) |
| 3303 | { |
| 3304 | int i; |
| 3305 | struct nfs4_client *clp = NULL; |
| 3306 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3307 | struct list_head *pos, *next, reaplist; |
| 3308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3309 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3310 | while (!list_empty(&conf_id_hashtbl[i])) { |
| 3311 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); |
| 3312 | expire_client(clp); |
| 3313 | } |
| 3314 | while (!list_empty(&unconf_str_hashtbl[i])) { |
| 3315 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); |
| 3316 | expire_client(clp); |
| 3317 | } |
| 3318 | } |
| 3319 | INIT_LIST_HEAD(&reaplist); |
| 3320 | spin_lock(&recall_lock); |
| 3321 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 3322 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 3323 | list_move(&dp->dl_recall_lru, &reaplist); |
| 3324 | } |
| 3325 | spin_unlock(&recall_lock); |
| 3326 | list_for_each_safe(pos, next, &reaplist) { |
| 3327 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 3328 | list_del_init(&dp->dl_recall_lru); |
| 3329 | unhash_delegation(dp); |
| 3330 | } |
| 3331 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3332 | nfsd4_shutdown_recdir(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3333 | nfs4_init = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3334 | } |
| 3335 | |
| 3336 | void |
| 3337 | nfs4_state_shutdown(void) |
| 3338 | { |
NeilBrown | 5e8d5c2 | 2006-04-10 22:55:37 -0700 | [diff] [blame] | 3339 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
| 3340 | destroy_workqueue(laundry_wq); |
J. Bruce Fields | 2c5e761 | 2008-11-20 14:36:17 -0600 | [diff] [blame] | 3341 | locks_end_grace(&nfsd4_manager); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3342 | nfs4_lock_state(); |
| 3343 | nfs4_release_reclaim(); |
| 3344 | __nfs4_state_shutdown(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3345 | nfs4_unlock_state(); |
| 3346 | } |
| 3347 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 3348 | /* |
| 3349 | * user_recovery_dirname is protected by the nfsd_mutex since it's only |
| 3350 | * accessed when nfsd is starting. |
| 3351 | */ |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3352 | static void |
| 3353 | nfs4_set_recdir(char *recdir) |
| 3354 | { |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3355 | strcpy(user_recovery_dirname, recdir); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3356 | } |
| 3357 | |
| 3358 | /* |
| 3359 | * Change the NFSv4 recovery directory to recdir. |
| 3360 | */ |
| 3361 | int |
| 3362 | nfs4_reset_recoverydir(char *recdir) |
| 3363 | { |
| 3364 | int status; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 3365 | struct path path; |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3366 | |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 3367 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3368 | if (status) |
| 3369 | return status; |
| 3370 | status = -ENOTDIR; |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 3371 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3372 | nfs4_set_recdir(recdir); |
| 3373 | status = 0; |
| 3374 | } |
Al Viro | a63bb99 | 2008-08-02 01:03:36 -0400 | [diff] [blame] | 3375 | path_put(&path); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3376 | return status; |
| 3377 | } |
| 3378 | |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 3379 | char * |
| 3380 | nfs4_recoverydir(void) |
| 3381 | { |
| 3382 | return user_recovery_dirname; |
| 3383 | } |
| 3384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3385 | /* |
| 3386 | * Called when leasetime is changed. |
| 3387 | * |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3388 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
| 3389 | * simulate a reboot. Instead of doing that, we just wait till the next time |
| 3390 | * we start to register any changes in lease time. If the administrator |
| 3391 | * really wants to change the lease time *now*, they can go ahead and bring |
| 3392 | * nfsd down and then back up again after changing the lease time. |
Jeff Layton | 3dd98a3 | 2008-06-10 08:40:36 -0400 | [diff] [blame] | 3393 | * |
| 3394 | * user_lease_time is protected by nfsd_mutex since it's only really accessed |
| 3395 | * when nfsd is starting |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3396 | */ |
| 3397 | void |
| 3398 | nfs4_reset_lease(time_t leasetime) |
| 3399 | { |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3400 | user_lease_time = leasetime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3401 | } |