Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/nfs/nfs4state.c |
| 3 | * |
| 4 | * Client-side XDR for NFSv4. |
| 5 | * |
| 6 | * Copyright (c) 2002 The Regents of the University of Michigan. |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Kendrick Smith <kmsmith@umich.edu> |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer. |
| 17 | * 2. Redistributions in binary form must reproduce the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer in the |
| 19 | * documentation and/or other materials provided with the distribution. |
| 20 | * 3. Neither the name of the University nor the names of its |
| 21 | * contributors may be used to endorse or promote products derived |
| 22 | * from this software without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 27 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 31 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 35 | * |
| 36 | * Implementation of the NFSv4 state model. For the time being, |
| 37 | * this is minimal, but will be made much more complex in a |
| 38 | * subsequent patch. |
| 39 | */ |
| 40 | |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 41 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/slab.h> |
| 43 | #include <linux/smp_lock.h> |
| 44 | #include <linux/nfs_fs.h> |
| 45 | #include <linux/nfs_idmap.h> |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 46 | #include <linux/kthread.h> |
| 47 | #include <linux/module.h> |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 48 | #include <linux/random.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <linux/workqueue.h> |
| 50 | #include <linux/bitops.h> |
| 51 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 52 | #include "nfs4_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include "callback.h" |
| 54 | #include "delegation.h" |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 55 | #include "internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | #define OPENOWNER_POOL_SIZE 8 |
| 58 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 59 | const nfs4_stateid zero_stateid; |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static LIST_HEAD(nfs4_clientid_list); |
| 62 | |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 63 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 65 | unsigned short port; |
| 66 | int status; |
| 67 | |
| 68 | port = nfs_callback_tcpport; |
| 69 | if (clp->cl_addr.ss_family == AF_INET6) |
| 70 | port = nfs_callback_tcpport6; |
| 71 | |
| 72 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | if (status == 0) |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 74 | status = nfs4_proc_setclientid_confirm(clp, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | if (status == 0) |
| 76 | nfs4_schedule_state_renewal(clp); |
| 77 | return status; |
| 78 | } |
| 79 | |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 80 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 81 | { |
| 82 | struct rpc_cred *cred = NULL; |
| 83 | |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 84 | if (clp->cl_machine_cred != NULL) |
| 85 | cred = get_rpccred(clp->cl_machine_cred); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 86 | return cred; |
| 87 | } |
| 88 | |
| 89 | static void nfs4_clear_machine_cred(struct nfs_client *clp) |
| 90 | { |
| 91 | struct rpc_cred *cred; |
| 92 | |
| 93 | spin_lock(&clp->cl_lock); |
| 94 | cred = clp->cl_machine_cred; |
| 95 | clp->cl_machine_cred = NULL; |
| 96 | spin_unlock(&clp->cl_lock); |
| 97 | if (cred != NULL) |
| 98 | put_rpccred(cred); |
| 99 | } |
| 100 | |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 101 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 102 | { |
| 103 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 104 | struct rb_node *pos; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 105 | struct rpc_cred *cred = NULL; |
| 106 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 107 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 108 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 109 | if (list_empty(&sp->so_states)) |
| 110 | continue; |
| 111 | cred = get_rpccred(sp->so_cred); |
| 112 | break; |
| 113 | } |
| 114 | return cred; |
| 115 | } |
| 116 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 117 | #if defined(CONFIG_NFS_V4_1) |
| 118 | |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 119 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
| 120 | { |
| 121 | int status; |
| 122 | |
| 123 | status = nfs4_proc_exchange_id(clp, cred); |
| 124 | if (status == 0) |
| 125 | /* create session schedules state renewal upon success */ |
| 126 | status = nfs4_proc_create_session(clp, 0); |
| 127 | if (status == 0) |
| 128 | nfs_mark_client_ready(clp, NFS_CS_READY); |
| 129 | return status; |
| 130 | } |
| 131 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 132 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
| 133 | { |
| 134 | struct rpc_cred *cred; |
| 135 | |
| 136 | spin_lock(&clp->cl_lock); |
| 137 | cred = nfs4_get_machine_cred_locked(clp); |
| 138 | spin_unlock(&clp->cl_lock); |
| 139 | return cred; |
| 140 | } |
| 141 | |
| 142 | #endif /* CONFIG_NFS_V4_1 */ |
| 143 | |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 144 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 145 | { |
| 146 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 147 | struct rb_node *pos; |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 148 | struct rpc_cred *cred; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 149 | |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 150 | spin_lock(&clp->cl_lock); |
| 151 | cred = nfs4_get_machine_cred_locked(clp); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 152 | if (cred != NULL) |
| 153 | goto out; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 154 | pos = rb_first(&clp->cl_state_owners); |
| 155 | if (pos != NULL) { |
| 156 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 157 | cred = get_rpccred(sp->so_cred); |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 158 | } |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 159 | out: |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 160 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 161 | return cred; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 162 | } |
| 163 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 164 | static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, |
| 165 | __u64 minval, int maxbits) |
| 166 | { |
| 167 | struct rb_node **p, *parent; |
| 168 | struct nfs_unique_id *pos; |
| 169 | __u64 mask = ~0ULL; |
| 170 | |
| 171 | if (maxbits < 64) |
| 172 | mask = (1ULL << maxbits) - 1ULL; |
| 173 | |
| 174 | /* Ensure distribution is more or less flat */ |
| 175 | get_random_bytes(&new->id, sizeof(new->id)); |
| 176 | new->id &= mask; |
| 177 | if (new->id < minval) |
| 178 | new->id += minval; |
| 179 | retry: |
| 180 | p = &root->rb_node; |
| 181 | parent = NULL; |
| 182 | |
| 183 | while (*p != NULL) { |
| 184 | parent = *p; |
| 185 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); |
| 186 | |
| 187 | if (new->id < pos->id) |
| 188 | p = &(*p)->rb_left; |
| 189 | else if (new->id > pos->id) |
| 190 | p = &(*p)->rb_right; |
| 191 | else |
| 192 | goto id_exists; |
| 193 | } |
| 194 | rb_link_node(&new->rb_node, parent, p); |
| 195 | rb_insert_color(&new->rb_node, root); |
| 196 | return; |
| 197 | id_exists: |
| 198 | for (;;) { |
| 199 | new->id++; |
| 200 | if (new->id < minval || (new->id & mask) != new->id) { |
| 201 | new->id = minval; |
| 202 | break; |
| 203 | } |
| 204 | parent = rb_next(parent); |
| 205 | if (parent == NULL) |
| 206 | break; |
| 207 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); |
| 208 | if (new->id < pos->id) |
| 209 | break; |
| 210 | } |
| 211 | goto retry; |
| 212 | } |
| 213 | |
| 214 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) |
| 215 | { |
| 216 | rb_erase(&id->rb_node, root); |
| 217 | } |
| 218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | static struct nfs4_state_owner * |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 220 | nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | { |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 222 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 223 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
| 224 | *parent = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | struct nfs4_state_owner *sp, *res = NULL; |
| 226 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 227 | while (*p != NULL) { |
| 228 | parent = *p; |
| 229 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); |
| 230 | |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 231 | if (server < sp->so_server) { |
| 232 | p = &parent->rb_left; |
| 233 | continue; |
| 234 | } |
| 235 | if (server > sp->so_server) { |
| 236 | p = &parent->rb_right; |
| 237 | continue; |
| 238 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 239 | if (cred < sp->so_cred) |
| 240 | p = &parent->rb_left; |
| 241 | else if (cred > sp->so_cred) |
| 242 | p = &parent->rb_right; |
| 243 | else { |
| 244 | atomic_inc(&sp->so_count); |
| 245 | res = sp; |
| 246 | break; |
| 247 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | } |
| 249 | return res; |
| 250 | } |
| 251 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 252 | static struct nfs4_state_owner * |
| 253 | nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) |
| 254 | { |
| 255 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
| 256 | *parent = NULL; |
| 257 | struct nfs4_state_owner *sp; |
| 258 | |
| 259 | while (*p != NULL) { |
| 260 | parent = *p; |
| 261 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); |
| 262 | |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 263 | if (new->so_server < sp->so_server) { |
| 264 | p = &parent->rb_left; |
| 265 | continue; |
| 266 | } |
| 267 | if (new->so_server > sp->so_server) { |
| 268 | p = &parent->rb_right; |
| 269 | continue; |
| 270 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 271 | if (new->so_cred < sp->so_cred) |
| 272 | p = &parent->rb_left; |
| 273 | else if (new->so_cred > sp->so_cred) |
| 274 | p = &parent->rb_right; |
| 275 | else { |
| 276 | atomic_inc(&sp->so_count); |
| 277 | return sp; |
| 278 | } |
| 279 | } |
| 280 | nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); |
| 281 | rb_link_node(&new->so_client_node, parent, p); |
| 282 | rb_insert_color(&new->so_client_node, &clp->cl_state_owners); |
| 283 | return new; |
| 284 | } |
| 285 | |
| 286 | static void |
| 287 | nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) |
| 288 | { |
| 289 | if (!RB_EMPTY_NODE(&sp->so_client_node)) |
| 290 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); |
| 291 | nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); |
| 292 | } |
| 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | /* |
| 295 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to |
| 296 | * create a new state_owner. |
| 297 | * |
| 298 | */ |
| 299 | static struct nfs4_state_owner * |
| 300 | nfs4_alloc_state_owner(void) |
| 301 | { |
| 302 | struct nfs4_state_owner *sp; |
| 303 | |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 304 | sp = kzalloc(sizeof(*sp),GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | if (!sp) |
| 306 | return NULL; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 307 | spin_lock_init(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | INIT_LIST_HEAD(&sp->so_states); |
| 309 | INIT_LIST_HEAD(&sp->so_delegations); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 310 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
| 311 | sp->so_seqid.sequence = &sp->so_sequence; |
| 312 | spin_lock_init(&sp->so_sequence.lock); |
| 313 | INIT_LIST_HEAD(&sp->so_sequence.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | atomic_set(&sp->so_count, 1); |
| 315 | return sp; |
| 316 | } |
| 317 | |
Adrian Bunk | 1d2e88e | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 318 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
| 320 | { |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 321 | if (!RB_EMPTY_NODE(&sp->so_client_node)) { |
| 322 | struct nfs_client *clp = sp->so_client; |
| 323 | |
| 324 | spin_lock(&clp->cl_lock); |
| 325 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); |
| 326 | RB_CLEAR_NODE(&sp->so_client_node); |
| 327 | spin_unlock(&clp->cl_lock); |
| 328 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | } |
| 330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
| 332 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 333 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | struct nfs4_state_owner *sp, *new; |
| 335 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | spin_lock(&clp->cl_lock); |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 337 | sp = nfs4_find_state_owner(server, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | if (sp != NULL) |
| 340 | return sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 341 | new = nfs4_alloc_state_owner(); |
| 342 | if (new == NULL) |
| 343 | return NULL; |
| 344 | new->so_client = clp; |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 345 | new->so_server = server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 346 | new->so_cred = cred; |
| 347 | spin_lock(&clp->cl_lock); |
| 348 | sp = nfs4_insert_state_owner(clp, new); |
| 349 | spin_unlock(&clp->cl_lock); |
| 350 | if (sp == new) |
| 351 | get_rpccred(cred); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 352 | else { |
| 353 | rpc_destroy_wait_queue(&new->so_sequence.wait); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 354 | kfree(new); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 355 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 356 | return sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
| 358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
| 360 | { |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 361 | struct nfs_client *clp = sp->so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | struct rpc_cred *cred = sp->so_cred; |
| 363 | |
| 364 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) |
| 365 | return; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 366 | nfs4_remove_state_owner(clp, sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 368 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | put_rpccred(cred); |
| 370 | kfree(sp); |
| 371 | } |
| 372 | |
| 373 | static struct nfs4_state * |
| 374 | nfs4_alloc_open_state(void) |
| 375 | { |
| 376 | struct nfs4_state *state; |
| 377 | |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 378 | state = kzalloc(sizeof(*state), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | if (!state) |
| 380 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | atomic_set(&state->count, 1); |
| 382 | INIT_LIST_HEAD(&state->lock_states); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 383 | spin_lock_init(&state->state_lock); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 384 | seqlock_init(&state->seqlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | return state; |
| 386 | } |
| 387 | |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 388 | void |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 389 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 390 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 391 | if (state->state == fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 392 | return; |
| 393 | /* NB! List reordering - see the reclaim code for why. */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 394 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
| 395 | if (fmode & FMODE_WRITE) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 396 | list_move(&state->open_states, &state->owner->so_states); |
| 397 | else |
| 398 | list_move_tail(&state->open_states, &state->owner->so_states); |
| 399 | } |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 400 | state->state = fmode; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 401 | } |
| 402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | static struct nfs4_state * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) |
| 405 | { |
| 406 | struct nfs_inode *nfsi = NFS_I(inode); |
| 407 | struct nfs4_state *state; |
| 408 | |
| 409 | list_for_each_entry(state, &nfsi->open_states, inode_states) { |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 410 | if (state->owner != owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | continue; |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 412 | if (atomic_inc_not_zero(&state->count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | return state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
| 415 | return NULL; |
| 416 | } |
| 417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | static void |
| 419 | nfs4_free_open_state(struct nfs4_state *state) |
| 420 | { |
| 421 | kfree(state); |
| 422 | } |
| 423 | |
| 424 | struct nfs4_state * |
| 425 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) |
| 426 | { |
| 427 | struct nfs4_state *state, *new; |
| 428 | struct nfs_inode *nfsi = NFS_I(inode); |
| 429 | |
| 430 | spin_lock(&inode->i_lock); |
| 431 | state = __nfs4_find_state_byowner(inode, owner); |
| 432 | spin_unlock(&inode->i_lock); |
| 433 | if (state) |
| 434 | goto out; |
| 435 | new = nfs4_alloc_open_state(); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 436 | spin_lock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | spin_lock(&inode->i_lock); |
| 438 | state = __nfs4_find_state_byowner(inode, owner); |
| 439 | if (state == NULL && new != NULL) { |
| 440 | state = new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | state->owner = owner; |
| 442 | atomic_inc(&owner->so_count); |
| 443 | list_add(&state->inode_states, &nfsi->open_states); |
| 444 | state->inode = igrab(inode); |
| 445 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 446 | /* Note: The reclaim code dictates that we add stateless |
| 447 | * and read-only stateids to the end of the list */ |
| 448 | list_add_tail(&state->open_states, &owner->so_states); |
| 449 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } else { |
| 451 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 452 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (new) |
| 454 | nfs4_free_open_state(new); |
| 455 | } |
| 456 | out: |
| 457 | return state; |
| 458 | } |
| 459 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | void nfs4_put_open_state(struct nfs4_state *state) |
| 461 | { |
| 462 | struct inode *inode = state->inode; |
| 463 | struct nfs4_state_owner *owner = state->owner; |
| 464 | |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 465 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | return; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 467 | spin_lock(&inode->i_lock); |
Trond Myklebust | ba68303 | 2007-07-27 10:23:05 -0400 | [diff] [blame] | 468 | list_del(&state->inode_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | list_del(&state->open_states); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 470 | spin_unlock(&inode->i_lock); |
| 471 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | nfs4_free_open_state(state); |
| 474 | nfs4_put_state_owner(owner); |
| 475 | } |
| 476 | |
| 477 | /* |
Trond Myklebust | 83c9d41 | 2005-10-18 14:20:13 -0700 | [diff] [blame] | 478 | * Close the current file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 480 | static void __nfs4_close(struct path *path, struct nfs4_state *state, fmode_t fmode, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | struct nfs4_state_owner *owner = state->owner; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 483 | int call_close = 0; |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 484 | fmode_t newstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
| 486 | atomic_inc(&owner->so_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | /* Protect against nfs4_find_state() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 488 | spin_lock(&owner->so_lock); |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 489 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 490 | case FMODE_READ: |
| 491 | state->n_rdonly--; |
| 492 | break; |
| 493 | case FMODE_WRITE: |
| 494 | state->n_wronly--; |
| 495 | break; |
| 496 | case FMODE_READ|FMODE_WRITE: |
| 497 | state->n_rdwr--; |
| 498 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 499 | newstate = FMODE_READ|FMODE_WRITE; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 500 | if (state->n_rdwr == 0) { |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 501 | if (state->n_rdonly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 502 | newstate &= ~FMODE_READ; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 503 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 504 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 505 | } |
| 506 | if (state->n_wronly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 507 | newstate &= ~FMODE_WRITE; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 508 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 509 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 510 | } |
| 511 | if (newstate == 0) |
| 512 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 513 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 514 | nfs4_state_set_mode_locked(state, newstate); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 515 | spin_unlock(&owner->so_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 516 | |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 517 | if (!call_close) { |
Trond Myklebust | b39e625 | 2007-06-11 23:05:07 -0400 | [diff] [blame] | 518 | nfs4_put_open_state(state); |
| 519 | nfs4_put_state_owner(owner); |
| 520 | } else |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 521 | nfs4_do_close(path, state, wait); |
| 522 | } |
| 523 | |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 524 | void nfs4_close_state(struct path *path, struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 525 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 526 | __nfs4_close(path, state, fmode, 0); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 527 | } |
| 528 | |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 529 | void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 530 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 531 | __nfs4_close(path, state, fmode, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | } |
| 533 | |
| 534 | /* |
| 535 | * Search the state->lock_states for an existing lock_owner |
| 536 | * that is compatible with current->files |
| 537 | */ |
| 538 | static struct nfs4_lock_state * |
| 539 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
| 540 | { |
| 541 | struct nfs4_lock_state *pos; |
| 542 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
| 543 | if (pos->ls_owner != fl_owner) |
| 544 | continue; |
| 545 | atomic_inc(&pos->ls_count); |
| 546 | return pos; |
| 547 | } |
| 548 | return NULL; |
| 549 | } |
| 550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | /* |
| 552 | * Return a compatible lock_state. If no initialized lock_state structure |
| 553 | * exists, return an uninitialized one. |
| 554 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | */ |
| 556 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
| 557 | { |
| 558 | struct nfs4_lock_state *lsp; |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 559 | struct nfs_client *clp = state->owner->so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 561 | lsp = kzalloc(sizeof(*lsp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | if (lsp == NULL) |
| 563 | return NULL; |
Trond Myklebust | d0dc370 | 2008-01-10 16:07:54 -0500 | [diff] [blame] | 564 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
| 565 | spin_lock_init(&lsp->ls_sequence.lock); |
| 566 | INIT_LIST_HEAD(&lsp->ls_sequence.list); |
| 567 | lsp->ls_seqid.sequence = &lsp->ls_sequence; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | atomic_set(&lsp->ls_count, 1); |
Trond Myklebust | b64aec8 | 2009-07-21 16:47:46 -0400 | [diff] [blame] | 569 | lsp->ls_state = state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | lsp->ls_owner = fl_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | spin_lock(&clp->cl_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 572 | nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 574 | INIT_LIST_HEAD(&lsp->ls_locks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | return lsp; |
| 576 | } |
| 577 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 578 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
| 579 | { |
| 580 | struct nfs_client *clp = lsp->ls_state->owner->so_client; |
| 581 | |
| 582 | spin_lock(&clp->cl_lock); |
| 583 | nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); |
| 584 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 585 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 586 | kfree(lsp); |
| 587 | } |
| 588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | /* |
| 590 | * Return a compatible lock_state. If no initialized lock_state structure |
| 591 | * exists, return an uninitialized one. |
| 592 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | */ |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 594 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 596 | struct nfs4_lock_state *lsp, *new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 598 | for(;;) { |
| 599 | spin_lock(&state->state_lock); |
| 600 | lsp = __nfs4_find_lock_state(state, owner); |
| 601 | if (lsp != NULL) |
| 602 | break; |
| 603 | if (new != NULL) { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 604 | list_add(&new->ls_locks, &state->lock_states); |
| 605 | set_bit(LK_STATE_IN_USE, &state->flags); |
| 606 | lsp = new; |
| 607 | new = NULL; |
| 608 | break; |
| 609 | } |
| 610 | spin_unlock(&state->state_lock); |
| 611 | new = nfs4_alloc_lock_state(state, owner); |
| 612 | if (new == NULL) |
| 613 | return NULL; |
| 614 | } |
| 615 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 616 | if (new != NULL) |
| 617 | nfs4_free_lock_state(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | return lsp; |
| 619 | } |
| 620 | |
| 621 | /* |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 622 | * Release reference to lock_state, and free it if we see that |
| 623 | * it is no longer in use |
| 624 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 625 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 626 | { |
| 627 | struct nfs4_state *state; |
| 628 | |
| 629 | if (lsp == NULL) |
| 630 | return; |
| 631 | state = lsp->ls_state; |
| 632 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
| 633 | return; |
| 634 | list_del(&lsp->ls_locks); |
| 635 | if (list_empty(&state->lock_states)) |
| 636 | clear_bit(LK_STATE_IN_USE, &state->flags); |
| 637 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 638 | nfs4_free_lock_state(lsp); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 639 | } |
| 640 | |
| 641 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
| 642 | { |
| 643 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
| 644 | |
| 645 | dst->fl_u.nfs4_fl.owner = lsp; |
| 646 | atomic_inc(&lsp->ls_count); |
| 647 | } |
| 648 | |
| 649 | static void nfs4_fl_release_lock(struct file_lock *fl) |
| 650 | { |
| 651 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
| 652 | } |
| 653 | |
Alexey Dobriyan | 6aed628 | 2009-09-21 17:01:11 -0700 | [diff] [blame] | 654 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 655 | .fl_copy_lock = nfs4_fl_copy_lock, |
| 656 | .fl_release_private = nfs4_fl_release_lock, |
| 657 | }; |
| 658 | |
| 659 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
| 660 | { |
| 661 | struct nfs4_lock_state *lsp; |
| 662 | |
| 663 | if (fl->fl_ops != NULL) |
| 664 | return 0; |
| 665 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
| 666 | if (lsp == NULL) |
| 667 | return -ENOMEM; |
| 668 | fl->fl_u.nfs4_fl.owner = lsp; |
| 669 | fl->fl_ops = &nfs4_fl_lock_ops; |
| 670 | return 0; |
| 671 | } |
| 672 | |
| 673 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | * Byte-range lock aware utility to initialize the stateid of read/write |
| 675 | * requests. |
| 676 | */ |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 677 | void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 679 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 680 | int seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 682 | do { |
| 683 | seq = read_seqbegin(&state->seqlock); |
| 684 | memcpy(dst, &state->stateid, sizeof(*dst)); |
| 685 | } while (read_seqretry(&state->seqlock, seq)); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 686 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
| 687 | return; |
| 688 | |
| 689 | spin_lock(&state->state_lock); |
| 690 | lsp = __nfs4_find_lock_state(state, fl_owner); |
| 691 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
| 692 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); |
| 693 | spin_unlock(&state->state_lock); |
| 694 | nfs4_put_lock_state(lsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | } |
| 696 | |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 697 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 699 | struct nfs_seqid *new; |
| 700 | |
| 701 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
| 702 | if (new != NULL) { |
| 703 | new->sequence = counter; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 704 | INIT_LIST_HEAD(&new->list); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 705 | } |
| 706 | return new; |
| 707 | } |
| 708 | |
| 709 | void nfs_free_seqid(struct nfs_seqid *seqid) |
| 710 | { |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 711 | if (!list_empty(&seqid->list)) { |
| 712 | struct rpc_sequence *sequence = seqid->sequence->sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 713 | |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 714 | spin_lock(&sequence->lock); |
| 715 | list_del(&seqid->list); |
| 716 | spin_unlock(&sequence->lock); |
| 717 | rpc_wake_up(&sequence->wait); |
| 718 | } |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 719 | kfree(seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | } |
| 721 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 723 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
| 724 | * failed with a seqid incrementing error - |
| 725 | * see comments nfs_fs.h:seqid_mutating_error() |
| 726 | */ |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 727 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | { |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 729 | BUG_ON(list_first_entry(&seqid->sequence->sequence->list, struct nfs_seqid, list) != seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 730 | switch (status) { |
| 731 | case 0: |
| 732 | break; |
| 733 | case -NFS4ERR_BAD_SEQID: |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 734 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
| 735 | return; |
| 736 | printk(KERN_WARNING "NFS: v4 server returned a bad" |
Dan Muntz | 497799e | 2008-02-13 13:09:35 -0800 | [diff] [blame] | 737 | " sequence-id error on an" |
| 738 | " unconfirmed sequence %p!\n", |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 739 | seqid->sequence); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 740 | case -NFS4ERR_STALE_CLIENTID: |
| 741 | case -NFS4ERR_STALE_STATEID: |
| 742 | case -NFS4ERR_BAD_STATEID: |
| 743 | case -NFS4ERR_BADXDR: |
| 744 | case -NFS4ERR_RESOURCE: |
| 745 | case -NFS4ERR_NOFILEHANDLE: |
| 746 | /* Non-seqid mutating errors */ |
| 747 | return; |
| 748 | }; |
| 749 | /* |
| 750 | * Note: no locking needed as we are guaranteed to be first |
| 751 | * on the sequence list |
| 752 | */ |
| 753 | seqid->sequence->counter++; |
| 754 | } |
| 755 | |
| 756 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) |
| 757 | { |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 758 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
| 759 | struct nfs4_state_owner, so_seqid); |
| 760 | struct nfs_server *server = sp->so_server; |
| 761 | |
| 762 | if (status == -NFS4ERR_BAD_SEQID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | nfs4_drop_state_owner(sp); |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 764 | if (!nfs4_has_session(server->nfs_client)) |
| 765 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 769 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
| 770 | * failed with a seqid incrementing error - |
| 771 | * see comments nfs_fs.h:seqid_mutating_error() |
| 772 | */ |
| 773 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) |
| 774 | { |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 775 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 776 | } |
| 777 | |
| 778 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) |
| 779 | { |
| 780 | struct rpc_sequence *sequence = seqid->sequence->sequence; |
| 781 | int status = 0; |
| 782 | |
| 783 | spin_lock(&sequence->lock); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 784 | if (list_empty(&seqid->list)) |
| 785 | list_add_tail(&seqid->list, &sequence->list); |
| 786 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) |
| 787 | goto unlock; |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 788 | rpc_sleep_on(&sequence->wait, task, NULL); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 789 | status = -EAGAIN; |
| 790 | unlock: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 791 | spin_unlock(&sequence->lock); |
| 792 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | } |
| 794 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 795 | static int nfs4_run_state_manager(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 797 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 798 | { |
| 799 | smp_mb__before_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 800 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 801 | smp_mb__after_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 802 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 803 | rpc_wake_up(&clp->cl_rpcwaitq); |
| 804 | } |
| 805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | /* |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 807 | * Schedule the nfs_client asynchronous state management routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | */ |
Trond Myklebust | b0d3ded | 2008-12-23 15:21:50 -0500 | [diff] [blame] | 809 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | { |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 811 | struct task_struct *task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 813 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 814 | return; |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 815 | __module_get(THIS_MODULE); |
| 816 | atomic_inc(&clp->cl_count); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 817 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 818 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 819 | RPC_DISPLAY_ADDR)); |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 820 | if (!IS_ERR(task)) |
| 821 | return; |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 822 | nfs4_clear_state_manager_bit(clp); |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 823 | nfs_put_client(clp); |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 824 | module_put(THIS_MODULE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | } |
| 826 | |
| 827 | /* |
| 828 | * Schedule a state recovery attempt |
| 829 | */ |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 830 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | { |
| 832 | if (!clp) |
| 833 | return; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 834 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 835 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 836 | nfs4_schedule_state_manager(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | } |
| 838 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 839 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
| 840 | { |
| 841 | |
| 842 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 843 | /* Don't recover state that expired before the reboot */ |
| 844 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { |
| 845 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 846 | return 0; |
| 847 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 848 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 849 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 850 | return 1; |
| 851 | } |
| 852 | |
Trond Myklebust | 9e33bed | 2008-12-23 15:21:46 -0500 | [diff] [blame] | 853 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 854 | { |
| 855 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 856 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 857 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 858 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
| 859 | return 1; |
| 860 | } |
| 861 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 862 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | { |
| 864 | struct inode *inode = state->inode; |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 865 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | struct file_lock *fl; |
| 867 | int status = 0; |
| 868 | |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 869 | if (inode->i_flock == NULL) |
| 870 | return 0; |
| 871 | |
| 872 | /* Guard against delegation returns and new lock/unlock calls */ |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 873 | down_write(&nfsi->rwsem); |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 874 | /* Protect inode->i_flock using the BKL */ |
| 875 | lock_kernel(); |
Harvey Harrison | 90dc7d2 | 2008-02-20 13:03:05 -0800 | [diff] [blame] | 876 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 877 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | continue; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 879 | if (nfs_file_open_context(fl->fl_file)->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | continue; |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 881 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | status = ops->recover_lock(state, fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | switch (status) { |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 884 | case 0: |
| 885 | break; |
| 886 | case -ESTALE: |
| 887 | case -NFS4ERR_ADMIN_REVOKED: |
| 888 | case -NFS4ERR_STALE_STATEID: |
| 889 | case -NFS4ERR_BAD_STATEID: |
| 890 | case -NFS4ERR_EXPIRED: |
| 891 | case -NFS4ERR_NO_GRACE: |
| 892 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 893 | case -NFS4ERR_BADSESSION: |
| 894 | case -NFS4ERR_BADSLOT: |
| 895 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 896 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 897 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | default: |
| 899 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 900 | __func__, status); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 901 | case -ENOMEM: |
| 902 | case -NFS4ERR_DENIED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | case -NFS4ERR_RECLAIM_BAD: |
| 904 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 905 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 906 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | } |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 908 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | } |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 910 | unlock_kernel(); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 911 | out: |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 912 | up_write(&nfsi->rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | return status; |
| 914 | } |
| 915 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 916 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | { |
| 918 | struct nfs4_state *state; |
| 919 | struct nfs4_lock_state *lock; |
| 920 | int status = 0; |
| 921 | |
| 922 | /* Note: we rely on the sp->so_states list being ordered |
| 923 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) |
| 924 | * states first. |
| 925 | * This is needed to ensure that the server won't give us any |
| 926 | * read delegations that we have to return if, say, we are |
| 927 | * recovering after a network partition or a reboot from a |
| 928 | * server that doesn't support a grace period. |
| 929 | */ |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 930 | restart: |
| 931 | spin_lock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 933 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
| 934 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | if (state->state == 0) |
| 936 | continue; |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 937 | atomic_inc(&state->count); |
| 938 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | status = ops->recover_open(sp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | if (status >= 0) { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 941 | status = nfs4_reclaim_locks(state, ops); |
| 942 | if (status >= 0) { |
| 943 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
| 944 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) |
| 945 | printk("%s: Lock reclaim failed!\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 946 | __func__); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 947 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 948 | nfs4_put_open_state(state); |
| 949 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | } |
| 952 | switch (status) { |
| 953 | default: |
| 954 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 955 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | case -ENOENT: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 957 | case -ENOMEM: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 958 | case -ESTALE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | /* |
| 960 | * Open state on this file cannot be recovered |
| 961 | * All we can do is revert to using the zero stateid. |
| 962 | */ |
| 963 | memset(state->stateid.data, 0, |
| 964 | sizeof(state->stateid.data)); |
| 965 | /* Mark the file as being 'closed' */ |
| 966 | state->state = 0; |
| 967 | break; |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 968 | case -NFS4ERR_ADMIN_REVOKED: |
| 969 | case -NFS4ERR_STALE_STATEID: |
| 970 | case -NFS4ERR_BAD_STATEID: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 971 | case -NFS4ERR_RECLAIM_BAD: |
| 972 | case -NFS4ERR_RECLAIM_CONFLICT: |
| 973 | nfs4_state_mark_reclaim_nograce(sp->so_client, state); |
| 974 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | case -NFS4ERR_EXPIRED: |
| 976 | case -NFS4ERR_NO_GRACE: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 977 | nfs4_state_mark_reclaim_nograce(sp->so_client, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 979 | case -NFS4ERR_BADSESSION: |
| 980 | case -NFS4ERR_BADSLOT: |
| 981 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 982 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | goto out_err; |
| 984 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 985 | nfs4_put_open_state(state); |
| 986 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 988 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | return 0; |
| 990 | out_err: |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 991 | nfs4_put_open_state(state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | return status; |
| 993 | } |
| 994 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 995 | static void nfs4_clear_open_state(struct nfs4_state *state) |
| 996 | { |
| 997 | struct nfs4_lock_state *lock; |
| 998 | |
| 999 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1000 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1001 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1002 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1003 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1004 | lock->ls_seqid.flags = 0; |
| 1005 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; |
| 1006 | } |
| 1007 | } |
| 1008 | |
| 1009 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1010 | { |
| 1011 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1012 | struct rb_node *pos; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1013 | struct nfs4_state *state; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1014 | |
| 1015 | /* Reset all sequence ids to zero */ |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1016 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 1017 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1018 | sp->so_seqid.flags = 0; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1019 | spin_lock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1020 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1021 | if (mark_reclaim(clp, state)) |
| 1022 | nfs4_clear_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1023 | } |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1024 | spin_unlock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1025 | } |
| 1026 | } |
| 1027 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1028 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
| 1029 | { |
| 1030 | /* Mark all delegations for reclaim */ |
| 1031 | nfs_delegation_mark_reclaim(clp); |
| 1032 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); |
| 1033 | } |
| 1034 | |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame^] | 1035 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
| 1036 | const struct nfs4_state_recovery_ops *ops) |
| 1037 | { |
| 1038 | /* Notify the server we're done reclaiming our state */ |
| 1039 | if (ops->reclaim_complete) |
| 1040 | (void)ops->reclaim_complete(clp); |
| 1041 | } |
| 1042 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1043 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
| 1044 | { |
| 1045 | struct nfs4_state_owner *sp; |
| 1046 | struct rb_node *pos; |
| 1047 | struct nfs4_state *state; |
| 1048 | |
| 1049 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1050 | return; |
| 1051 | |
| 1052 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 1053 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
| 1054 | spin_lock(&sp->so_lock); |
| 1055 | list_for_each_entry(state, &sp->so_states, open_states) { |
| 1056 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) |
| 1057 | continue; |
| 1058 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1059 | } |
| 1060 | spin_unlock(&sp->so_lock); |
| 1061 | } |
| 1062 | |
| 1063 | nfs_delegation_reap_unclaimed(clp); |
| 1064 | } |
| 1065 | |
| 1066 | static void nfs_delegation_clear_all(struct nfs_client *clp) |
| 1067 | { |
| 1068 | nfs_delegation_mark_reclaim(clp); |
| 1069 | nfs_delegation_reap_unclaimed(clp); |
| 1070 | } |
| 1071 | |
| 1072 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
| 1073 | { |
| 1074 | nfs_delegation_clear_all(clp); |
| 1075 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 1076 | } |
| 1077 | |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1078 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1079 | { |
| 1080 | switch (error) { |
| 1081 | case -NFS4ERR_CB_PATH_DOWN: |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1082 | nfs_handle_cb_pathdown(clp); |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1083 | return 0; |
Trond Myklebust | c8b7ae3d | 2009-12-03 15:53:21 -0500 | [diff] [blame] | 1084 | case -NFS4ERR_NO_GRACE: |
| 1085 | nfs4_state_end_reclaim_reboot(clp); |
| 1086 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1087 | case -NFS4ERR_STALE_CLIENTID: |
| 1088 | case -NFS4ERR_LEASE_MOVED: |
| 1089 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 1090 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1091 | nfs4_state_start_reclaim_reboot(clp); |
| 1092 | break; |
| 1093 | case -NFS4ERR_EXPIRED: |
| 1094 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1095 | nfs4_state_start_reclaim_nograce(clp); |
Andy Adamson | 8ba9bf8 | 2009-12-04 15:55:34 -0500 | [diff] [blame] | 1096 | break; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1097 | case -NFS4ERR_BADSESSION: |
| 1098 | case -NFS4ERR_BADSLOT: |
| 1099 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1100 | case -NFS4ERR_DEADSESSION: |
| 1101 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1102 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 1103 | case -NFS4ERR_SEQ_MISORDERED: |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1104 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 0b9e2d4 | 2009-12-04 16:02:14 -0500 | [diff] [blame] | 1105 | /* Zero session reset errors */ |
| 1106 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1107 | } |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1108 | return error; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1109 | } |
| 1110 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1111 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | { |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1113 | struct rb_node *pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | int status = 0; |
| 1115 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1116 | restart: |
| 1117 | spin_lock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1118 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 1119 | struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1120 | if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) |
| 1121 | continue; |
| 1122 | atomic_inc(&sp->so_count); |
| 1123 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1124 | status = nfs4_reclaim_open_state(sp, ops); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1125 | if (status < 0) { |
| 1126 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
| 1127 | nfs4_put_state_owner(sp); |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1128 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1129 | } |
| 1130 | nfs4_put_state_owner(sp); |
| 1131 | goto restart; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1132 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1133 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1134 | return status; |
| 1135 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1137 | static int nfs4_check_lease(struct nfs_client *clp) |
| 1138 | { |
| 1139 | struct rpc_cred *cred; |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1140 | struct nfs4_state_maintenance_ops *ops = |
| 1141 | nfs4_state_renewal_ops[clp->cl_minorversion]; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1142 | int status = -NFS4ERR_EXPIRED; |
| 1143 | |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1144 | /* Is the client already known to have an expired lease? */ |
| 1145 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1146 | return 0; |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 1147 | spin_lock(&clp->cl_lock); |
| 1148 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1149 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1150 | if (cred == NULL) { |
| 1151 | cred = nfs4_get_setclientid_cred(clp); |
| 1152 | if (cred == NULL) |
| 1153 | goto out; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1154 | } |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1155 | status = ops->renew_lease(clp, cred); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1156 | put_rpccred(cred); |
| 1157 | out: |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1158 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1159 | } |
| 1160 | |
| 1161 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
| 1162 | { |
| 1163 | struct rpc_cred *cred; |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1164 | struct nfs4_state_recovery_ops *ops = |
| 1165 | nfs4_reboot_recovery_ops[clp->cl_minorversion]; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1166 | int status = -ENOENT; |
| 1167 | |
Andy Adamson | 90a1661 | 2009-04-01 09:22:48 -0400 | [diff] [blame] | 1168 | cred = ops->get_clid_cred(clp); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1169 | if (cred != NULL) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1170 | status = ops->establish_clid(clp, cred); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1171 | put_rpccred(cred); |
| 1172 | /* Handle case where the user hasn't set up machine creds */ |
| 1173 | if (status == -EACCES && cred == clp->cl_machine_cred) { |
| 1174 | nfs4_clear_machine_cred(clp); |
| 1175 | status = -EAGAIN; |
| 1176 | } |
Benny Halevy | c2e713d | 2009-04-01 09:21:51 -0400 | [diff] [blame] | 1177 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
| 1178 | status = -EPROTONOSUPPORT; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1179 | } |
| 1180 | return status; |
| 1181 | } |
| 1182 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1183 | #ifdef CONFIG_NFS_V4_1 |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1184 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
| 1185 | { |
| 1186 | if (!flags) |
| 1187 | return; |
| 1188 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) { |
| 1189 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1190 | nfs4_state_start_reclaim_reboot(clp); |
| 1191 | nfs4_schedule_state_recovery(clp); |
| 1192 | } else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
| 1193 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
| 1194 | SEQ4_STATUS_ADMIN_STATE_REVOKED | |
| 1195 | SEQ4_STATUS_RECALLABLE_STATE_REVOKED | |
| 1196 | SEQ4_STATUS_LEASE_MOVED)) { |
| 1197 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1198 | nfs4_state_start_reclaim_nograce(clp); |
| 1199 | nfs4_schedule_state_recovery(clp); |
| 1200 | } else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
| 1201 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
| 1202 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
| 1203 | nfs_expire_all_delegations(clp); |
| 1204 | } |
| 1205 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1206 | static void nfs4_session_recovery_handle_error(struct nfs_client *clp, int err) |
| 1207 | { |
| 1208 | switch (err) { |
| 1209 | case -NFS4ERR_STALE_CLIENTID: |
| 1210 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | static int nfs4_reset_session(struct nfs_client *clp) |
| 1215 | { |
Andy Adamson | ea028ac | 2009-12-04 15:55:38 -0500 | [diff] [blame] | 1216 | struct nfs4_session *ses = clp->cl_session; |
| 1217 | struct nfs4_slot_table *tbl = &ses->fc_slot_table; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1218 | int status; |
| 1219 | |
Andy Adamson | ea028ac | 2009-12-04 15:55:38 -0500 | [diff] [blame] | 1220 | INIT_COMPLETION(ses->complete); |
| 1221 | spin_lock(&tbl->slot_tbl_lock); |
Trond Myklebust | 0556d1a | 2009-12-05 15:03:20 -0500 | [diff] [blame] | 1222 | set_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state); |
Andy Adamson | ea028ac | 2009-12-04 15:55:38 -0500 | [diff] [blame] | 1223 | if (tbl->highest_used_slotid != -1) { |
Andy Adamson | ea028ac | 2009-12-04 15:55:38 -0500 | [diff] [blame] | 1224 | spin_unlock(&tbl->slot_tbl_lock); |
| 1225 | status = wait_for_completion_interruptible(&ses->complete); |
Andy Adamson | ea028ac | 2009-12-04 15:55:38 -0500 | [diff] [blame] | 1226 | if (status) /* -ERESTARTSYS */ |
| 1227 | goto out; |
| 1228 | } else { |
| 1229 | spin_unlock(&tbl->slot_tbl_lock); |
| 1230 | } |
| 1231 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1232 | status = nfs4_proc_destroy_session(clp->cl_session); |
| 1233 | if (status && status != -NFS4ERR_BADSESSION && |
| 1234 | status != -NFS4ERR_DEADSESSION) { |
| 1235 | nfs4_session_recovery_handle_error(clp, status); |
| 1236 | goto out; |
| 1237 | } |
| 1238 | |
| 1239 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
| 1240 | status = nfs4_proc_create_session(clp, 1); |
| 1241 | if (status) |
| 1242 | nfs4_session_recovery_handle_error(clp, status); |
| 1243 | /* fall through*/ |
| 1244 | out: |
| 1245 | /* Wake up the next rpc task even on error */ |
Andy Adamson | 0b9e2d4 | 2009-12-04 16:02:14 -0500 | [diff] [blame] | 1246 | clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1247 | rpc_wake_up_next(&clp->cl_session->fc_slot_table.slot_tbl_waitq); |
| 1248 | return status; |
| 1249 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1250 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1251 | #else /* CONFIG_NFS_V4_1 */ |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1252 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1253 | #endif /* CONFIG_NFS_V4_1 */ |
| 1254 | |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1255 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
| 1256 | * on EXCHANGE_ID for v4.1 |
| 1257 | */ |
| 1258 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) |
| 1259 | { |
| 1260 | if (nfs4_has_session(clp)) { |
| 1261 | switch (status) { |
| 1262 | case -NFS4ERR_DELAY: |
| 1263 | case -NFS4ERR_CLID_INUSE: |
| 1264 | case -EAGAIN: |
| 1265 | break; |
| 1266 | |
| 1267 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 1268 | * in nfs4_exchange_id */ |
| 1269 | default: |
| 1270 | return; |
| 1271 | } |
| 1272 | } |
| 1273 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1274 | } |
| 1275 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1276 | static void nfs4_state_manager(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1277 | { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1278 | int status = 0; |
| 1279 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1280 | /* Ensure exclusive access to NFSv4 state */ |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1281 | for(;;) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1282 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
| 1283 | /* We're going to have to re-establish a clientid */ |
| 1284 | status = nfs4_reclaim_lease(clp); |
| 1285 | if (status) { |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1286 | nfs4_set_lease_expired(clp, status); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1287 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
| 1288 | &clp->cl_state)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1289 | continue; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1290 | if (clp->cl_cons_state == |
| 1291 | NFS_CS_SESSION_INITING) |
| 1292 | nfs_mark_client_ready(clp, status); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1293 | goto out_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | } |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1295 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 1296 | } |
| 1297 | |
| 1298 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
| 1299 | status = nfs4_check_lease(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1300 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1301 | continue; |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1302 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
| 1303 | goto out_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1305 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1306 | /* Initialize or reset the session */ |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1307 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
Trond Myklebust | 7111dc7 | 2009-08-24 19:21:29 -0400 | [diff] [blame] | 1308 | && nfs4_has_session(clp)) { |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 1309 | status = nfs4_reset_session(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1310 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1311 | continue; |
| 1312 | if (status < 0) |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1313 | goto out_error; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1314 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1315 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1316 | /* First recover reboot state... */ |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 1317 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1318 | status = nfs4_do_reclaim(clp, |
| 1319 | nfs4_reboot_recovery_ops[clp->cl_minorversion]); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1320 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1321 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1322 | continue; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1323 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1324 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 1325 | continue; |
| 1326 | if (status < 0) |
| 1327 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1328 | } |
| 1329 | |
| 1330 | /* Now recover expired state... */ |
| 1331 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1332 | status = nfs4_do_reclaim(clp, |
| 1333 | nfs4_nograce_recovery_ops[clp->cl_minorversion]); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1334 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1335 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1336 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1337 | continue; |
| 1338 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1339 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1340 | } |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1341 | |
| 1342 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
| 1343 | nfs_client_return_marked_delegations(clp); |
| 1344 | continue; |
| 1345 | } |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1346 | |
| 1347 | nfs4_clear_state_manager_bit(clp); |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1348 | /* Did we race with an attempt to give us more work? */ |
| 1349 | if (clp->cl_state == 0) |
| 1350 | break; |
| 1351 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1352 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | } |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1354 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | out_error: |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1356 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 1357 | " with error %d\n", clp->cl_hostname, -status); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1358 | nfs4_clear_state_manager_bit(clp); |
| 1359 | } |
| 1360 | |
| 1361 | static int nfs4_run_state_manager(void *ptr) |
| 1362 | { |
| 1363 | struct nfs_client *clp = ptr; |
| 1364 | |
| 1365 | allow_signal(SIGKILL); |
| 1366 | nfs4_state_manager(clp); |
| 1367 | nfs_put_client(clp); |
| 1368 | module_put_and_exit(0); |
| 1369 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | } |
| 1371 | |
| 1372 | /* |
| 1373 | * Local variables: |
| 1374 | * c-basic-offset: 8 |
| 1375 | * End: |
| 1376 | */ |