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 | |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 119 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
| 120 | { |
| 121 | int status; |
| 122 | struct nfs_fsinfo fsinfo; |
| 123 | |
| 124 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
| 125 | if (status == 0) { |
| 126 | /* Update lease time and schedule renewal */ |
| 127 | spin_lock(&clp->cl_lock); |
| 128 | clp->cl_lease_time = fsinfo.lease_time * HZ; |
| 129 | clp->cl_last_renewal = jiffies; |
| 130 | spin_unlock(&clp->cl_lock); |
| 131 | |
| 132 | nfs4_schedule_state_renewal(clp); |
| 133 | } |
| 134 | |
| 135 | return status; |
| 136 | } |
| 137 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame^] | 138 | static void nfs4_end_drain_session(struct nfs_client *clp) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 139 | { |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame^] | 140 | struct nfs4_session *ses = clp->cl_session; |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 141 | int max_slots; |
| 142 | |
| 143 | if (test_and_clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) { |
| 144 | spin_lock(&ses->fc_slot_table.slot_tbl_lock); |
| 145 | max_slots = ses->fc_slot_table.max_slots; |
| 146 | while (max_slots--) { |
| 147 | struct rpc_task *task; |
| 148 | |
| 149 | task = rpc_wake_up_next(&ses->fc_slot_table. |
| 150 | slot_tbl_waitq); |
| 151 | if (!task) |
| 152 | break; |
| 153 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 154 | } |
| 155 | spin_unlock(&ses->fc_slot_table.slot_tbl_lock); |
| 156 | } |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 157 | } |
| 158 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame^] | 159 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 160 | { |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame^] | 161 | struct nfs4_session *ses = clp->cl_session; |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 162 | struct nfs4_slot_table *tbl = &ses->fc_slot_table; |
| 163 | |
| 164 | spin_lock(&tbl->slot_tbl_lock); |
| 165 | set_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state); |
| 166 | if (tbl->highest_used_slotid != -1) { |
| 167 | INIT_COMPLETION(ses->complete); |
| 168 | spin_unlock(&tbl->slot_tbl_lock); |
| 169 | return wait_for_completion_interruptible(&ses->complete); |
| 170 | } |
| 171 | spin_unlock(&tbl->slot_tbl_lock); |
| 172 | return 0; |
| 173 | } |
| 174 | |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 175 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
| 176 | { |
| 177 | int status; |
| 178 | |
| 179 | status = nfs4_proc_exchange_id(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 180 | if (status != 0) |
| 181 | goto out; |
| 182 | status = nfs4_proc_create_session(clp); |
| 183 | if (status != 0) |
| 184 | goto out; |
| 185 | nfs41_setup_state_renewal(clp); |
| 186 | nfs_mark_client_ready(clp, NFS_CS_READY); |
| 187 | out: |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 188 | return status; |
| 189 | } |
| 190 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 191 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
| 192 | { |
| 193 | struct rpc_cred *cred; |
| 194 | |
| 195 | spin_lock(&clp->cl_lock); |
| 196 | cred = nfs4_get_machine_cred_locked(clp); |
| 197 | spin_unlock(&clp->cl_lock); |
| 198 | return cred; |
| 199 | } |
| 200 | |
| 201 | #endif /* CONFIG_NFS_V4_1 */ |
| 202 | |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 203 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 204 | { |
| 205 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 206 | struct rb_node *pos; |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 207 | struct rpc_cred *cred; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 208 | |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 209 | spin_lock(&clp->cl_lock); |
| 210 | cred = nfs4_get_machine_cred_locked(clp); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 211 | if (cred != NULL) |
| 212 | goto out; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 213 | pos = rb_first(&clp->cl_state_owners); |
| 214 | if (pos != NULL) { |
| 215 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 216 | cred = get_rpccred(sp->so_cred); |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 217 | } |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 218 | out: |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 219 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 220 | return cred; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 221 | } |
| 222 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 223 | static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, |
| 224 | __u64 minval, int maxbits) |
| 225 | { |
| 226 | struct rb_node **p, *parent; |
| 227 | struct nfs_unique_id *pos; |
| 228 | __u64 mask = ~0ULL; |
| 229 | |
| 230 | if (maxbits < 64) |
| 231 | mask = (1ULL << maxbits) - 1ULL; |
| 232 | |
| 233 | /* Ensure distribution is more or less flat */ |
| 234 | get_random_bytes(&new->id, sizeof(new->id)); |
| 235 | new->id &= mask; |
| 236 | if (new->id < minval) |
| 237 | new->id += minval; |
| 238 | retry: |
| 239 | p = &root->rb_node; |
| 240 | parent = NULL; |
| 241 | |
| 242 | while (*p != NULL) { |
| 243 | parent = *p; |
| 244 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); |
| 245 | |
| 246 | if (new->id < pos->id) |
| 247 | p = &(*p)->rb_left; |
| 248 | else if (new->id > pos->id) |
| 249 | p = &(*p)->rb_right; |
| 250 | else |
| 251 | goto id_exists; |
| 252 | } |
| 253 | rb_link_node(&new->rb_node, parent, p); |
| 254 | rb_insert_color(&new->rb_node, root); |
| 255 | return; |
| 256 | id_exists: |
| 257 | for (;;) { |
| 258 | new->id++; |
| 259 | if (new->id < minval || (new->id & mask) != new->id) { |
| 260 | new->id = minval; |
| 261 | break; |
| 262 | } |
| 263 | parent = rb_next(parent); |
| 264 | if (parent == NULL) |
| 265 | break; |
| 266 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); |
| 267 | if (new->id < pos->id) |
| 268 | break; |
| 269 | } |
| 270 | goto retry; |
| 271 | } |
| 272 | |
| 273 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) |
| 274 | { |
| 275 | rb_erase(&id->rb_node, root); |
| 276 | } |
| 277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | static struct nfs4_state_owner * |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 279 | nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | { |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 281 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 282 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
| 283 | *parent = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | struct nfs4_state_owner *sp, *res = NULL; |
| 285 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 286 | while (*p != NULL) { |
| 287 | parent = *p; |
| 288 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); |
| 289 | |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 290 | if (server < sp->so_server) { |
| 291 | p = &parent->rb_left; |
| 292 | continue; |
| 293 | } |
| 294 | if (server > sp->so_server) { |
| 295 | p = &parent->rb_right; |
| 296 | continue; |
| 297 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 298 | if (cred < sp->so_cred) |
| 299 | p = &parent->rb_left; |
| 300 | else if (cred > sp->so_cred) |
| 301 | p = &parent->rb_right; |
| 302 | else { |
| 303 | atomic_inc(&sp->so_count); |
| 304 | res = sp; |
| 305 | break; |
| 306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
| 308 | return res; |
| 309 | } |
| 310 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 311 | static struct nfs4_state_owner * |
| 312 | nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) |
| 313 | { |
| 314 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
| 315 | *parent = NULL; |
| 316 | struct nfs4_state_owner *sp; |
| 317 | |
| 318 | while (*p != NULL) { |
| 319 | parent = *p; |
| 320 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); |
| 321 | |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 322 | if (new->so_server < sp->so_server) { |
| 323 | p = &parent->rb_left; |
| 324 | continue; |
| 325 | } |
| 326 | if (new->so_server > sp->so_server) { |
| 327 | p = &parent->rb_right; |
| 328 | continue; |
| 329 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 330 | if (new->so_cred < sp->so_cred) |
| 331 | p = &parent->rb_left; |
| 332 | else if (new->so_cred > sp->so_cred) |
| 333 | p = &parent->rb_right; |
| 334 | else { |
| 335 | atomic_inc(&sp->so_count); |
| 336 | return sp; |
| 337 | } |
| 338 | } |
| 339 | nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); |
| 340 | rb_link_node(&new->so_client_node, parent, p); |
| 341 | rb_insert_color(&new->so_client_node, &clp->cl_state_owners); |
| 342 | return new; |
| 343 | } |
| 344 | |
| 345 | static void |
| 346 | nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) |
| 347 | { |
| 348 | if (!RB_EMPTY_NODE(&sp->so_client_node)) |
| 349 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); |
| 350 | nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); |
| 351 | } |
| 352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | /* |
| 354 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to |
| 355 | * create a new state_owner. |
| 356 | * |
| 357 | */ |
| 358 | static struct nfs4_state_owner * |
| 359 | nfs4_alloc_state_owner(void) |
| 360 | { |
| 361 | struct nfs4_state_owner *sp; |
| 362 | |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 363 | sp = kzalloc(sizeof(*sp),GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | if (!sp) |
| 365 | return NULL; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 366 | spin_lock_init(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | INIT_LIST_HEAD(&sp->so_states); |
| 368 | INIT_LIST_HEAD(&sp->so_delegations); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 369 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
| 370 | sp->so_seqid.sequence = &sp->so_sequence; |
| 371 | spin_lock_init(&sp->so_sequence.lock); |
| 372 | INIT_LIST_HEAD(&sp->so_sequence.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | atomic_set(&sp->so_count, 1); |
| 374 | return sp; |
| 375 | } |
| 376 | |
Adrian Bunk | 1d2e88e | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 377 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
| 379 | { |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 380 | if (!RB_EMPTY_NODE(&sp->so_client_node)) { |
| 381 | struct nfs_client *clp = sp->so_client; |
| 382 | |
| 383 | spin_lock(&clp->cl_lock); |
| 384 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); |
| 385 | RB_CLEAR_NODE(&sp->so_client_node); |
| 386 | spin_unlock(&clp->cl_lock); |
| 387 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
| 389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
| 391 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 392 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | struct nfs4_state_owner *sp, *new; |
| 394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | spin_lock(&clp->cl_lock); |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 396 | sp = nfs4_find_state_owner(server, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | if (sp != NULL) |
| 399 | return sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 400 | new = nfs4_alloc_state_owner(); |
| 401 | if (new == NULL) |
| 402 | return NULL; |
| 403 | new->so_client = clp; |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 404 | new->so_server = server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 405 | new->so_cred = cred; |
| 406 | spin_lock(&clp->cl_lock); |
| 407 | sp = nfs4_insert_state_owner(clp, new); |
| 408 | spin_unlock(&clp->cl_lock); |
| 409 | if (sp == new) |
| 410 | get_rpccred(cred); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 411 | else { |
| 412 | rpc_destroy_wait_queue(&new->so_sequence.wait); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 413 | kfree(new); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 414 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 415 | return sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
| 417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
| 419 | { |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 420 | struct nfs_client *clp = sp->so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | struct rpc_cred *cred = sp->so_cred; |
| 422 | |
| 423 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) |
| 424 | return; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 425 | nfs4_remove_state_owner(clp, sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 427 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | put_rpccred(cred); |
| 429 | kfree(sp); |
| 430 | } |
| 431 | |
| 432 | static struct nfs4_state * |
| 433 | nfs4_alloc_open_state(void) |
| 434 | { |
| 435 | struct nfs4_state *state; |
| 436 | |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 437 | state = kzalloc(sizeof(*state), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | if (!state) |
| 439 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | atomic_set(&state->count, 1); |
| 441 | INIT_LIST_HEAD(&state->lock_states); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 442 | spin_lock_init(&state->state_lock); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 443 | seqlock_init(&state->seqlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | return state; |
| 445 | } |
| 446 | |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 447 | void |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 448 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 449 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 450 | if (state->state == fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 451 | return; |
| 452 | /* NB! List reordering - see the reclaim code for why. */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 453 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
| 454 | if (fmode & FMODE_WRITE) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 455 | list_move(&state->open_states, &state->owner->so_states); |
| 456 | else |
| 457 | list_move_tail(&state->open_states, &state->owner->so_states); |
| 458 | } |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 459 | state->state = fmode; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 460 | } |
| 461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | static struct nfs4_state * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) |
| 464 | { |
| 465 | struct nfs_inode *nfsi = NFS_I(inode); |
| 466 | struct nfs4_state *state; |
| 467 | |
| 468 | list_for_each_entry(state, &nfsi->open_states, inode_states) { |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 469 | if (state->owner != owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | continue; |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 471 | if (atomic_inc_not_zero(&state->count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | return state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | } |
| 474 | return NULL; |
| 475 | } |
| 476 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | static void |
| 478 | nfs4_free_open_state(struct nfs4_state *state) |
| 479 | { |
| 480 | kfree(state); |
| 481 | } |
| 482 | |
| 483 | struct nfs4_state * |
| 484 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) |
| 485 | { |
| 486 | struct nfs4_state *state, *new; |
| 487 | struct nfs_inode *nfsi = NFS_I(inode); |
| 488 | |
| 489 | spin_lock(&inode->i_lock); |
| 490 | state = __nfs4_find_state_byowner(inode, owner); |
| 491 | spin_unlock(&inode->i_lock); |
| 492 | if (state) |
| 493 | goto out; |
| 494 | new = nfs4_alloc_open_state(); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 495 | spin_lock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | spin_lock(&inode->i_lock); |
| 497 | state = __nfs4_find_state_byowner(inode, owner); |
| 498 | if (state == NULL && new != NULL) { |
| 499 | state = new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | state->owner = owner; |
| 501 | atomic_inc(&owner->so_count); |
| 502 | list_add(&state->inode_states, &nfsi->open_states); |
| 503 | state->inode = igrab(inode); |
| 504 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 505 | /* Note: The reclaim code dictates that we add stateless |
| 506 | * and read-only stateids to the end of the list */ |
| 507 | list_add_tail(&state->open_states, &owner->so_states); |
| 508 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | } else { |
| 510 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 511 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | if (new) |
| 513 | nfs4_free_open_state(new); |
| 514 | } |
| 515 | out: |
| 516 | return state; |
| 517 | } |
| 518 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | void nfs4_put_open_state(struct nfs4_state *state) |
| 520 | { |
| 521 | struct inode *inode = state->inode; |
| 522 | struct nfs4_state_owner *owner = state->owner; |
| 523 | |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 524 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | return; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 526 | spin_lock(&inode->i_lock); |
Trond Myklebust | ba68303 | 2007-07-27 10:23:05 -0400 | [diff] [blame] | 527 | list_del(&state->inode_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | list_del(&state->open_states); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 529 | spin_unlock(&inode->i_lock); |
| 530 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | nfs4_free_open_state(state); |
| 533 | nfs4_put_state_owner(owner); |
| 534 | } |
| 535 | |
| 536 | /* |
Trond Myklebust | 83c9d41 | 2005-10-18 14:20:13 -0700 | [diff] [blame] | 537 | * Close the current file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 539 | 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] | 540 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | struct nfs4_state_owner *owner = state->owner; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 542 | int call_close = 0; |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 543 | fmode_t newstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
| 545 | atomic_inc(&owner->so_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | /* Protect against nfs4_find_state() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 547 | spin_lock(&owner->so_lock); |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 548 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 549 | case FMODE_READ: |
| 550 | state->n_rdonly--; |
| 551 | break; |
| 552 | case FMODE_WRITE: |
| 553 | state->n_wronly--; |
| 554 | break; |
| 555 | case FMODE_READ|FMODE_WRITE: |
| 556 | state->n_rdwr--; |
| 557 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 558 | newstate = FMODE_READ|FMODE_WRITE; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 559 | if (state->n_rdwr == 0) { |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 560 | if (state->n_rdonly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 561 | newstate &= ~FMODE_READ; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 562 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 563 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 564 | } |
| 565 | if (state->n_wronly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 566 | newstate &= ~FMODE_WRITE; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 567 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 568 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 569 | } |
| 570 | if (newstate == 0) |
| 571 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 572 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 573 | nfs4_state_set_mode_locked(state, newstate); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 574 | spin_unlock(&owner->so_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 575 | |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 576 | if (!call_close) { |
Trond Myklebust | b39e625 | 2007-06-11 23:05:07 -0400 | [diff] [blame] | 577 | nfs4_put_open_state(state); |
| 578 | nfs4_put_state_owner(owner); |
| 579 | } else |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 580 | nfs4_do_close(path, state, wait); |
| 581 | } |
| 582 | |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 583 | 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] | 584 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 585 | __nfs4_close(path, state, fmode, 0); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 586 | } |
| 587 | |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 588 | 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] | 589 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 590 | __nfs4_close(path, state, fmode, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | } |
| 592 | |
| 593 | /* |
| 594 | * Search the state->lock_states for an existing lock_owner |
| 595 | * that is compatible with current->files |
| 596 | */ |
| 597 | static struct nfs4_lock_state * |
| 598 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
| 599 | { |
| 600 | struct nfs4_lock_state *pos; |
| 601 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
| 602 | if (pos->ls_owner != fl_owner) |
| 603 | continue; |
| 604 | atomic_inc(&pos->ls_count); |
| 605 | return pos; |
| 606 | } |
| 607 | return NULL; |
| 608 | } |
| 609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | /* |
| 611 | * Return a compatible lock_state. If no initialized lock_state structure |
| 612 | * exists, return an uninitialized one. |
| 613 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | */ |
| 615 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
| 616 | { |
| 617 | struct nfs4_lock_state *lsp; |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 618 | struct nfs_client *clp = state->owner->so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 620 | lsp = kzalloc(sizeof(*lsp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | if (lsp == NULL) |
| 622 | return NULL; |
Trond Myklebust | d0dc370 | 2008-01-10 16:07:54 -0500 | [diff] [blame] | 623 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
| 624 | spin_lock_init(&lsp->ls_sequence.lock); |
| 625 | INIT_LIST_HEAD(&lsp->ls_sequence.list); |
| 626 | lsp->ls_seqid.sequence = &lsp->ls_sequence; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | atomic_set(&lsp->ls_count, 1); |
Trond Myklebust | b64aec8 | 2009-07-21 16:47:46 -0400 | [diff] [blame] | 628 | lsp->ls_state = state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | lsp->ls_owner = fl_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | spin_lock(&clp->cl_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 631 | 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] | 632 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 633 | INIT_LIST_HEAD(&lsp->ls_locks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | return lsp; |
| 635 | } |
| 636 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 637 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
| 638 | { |
| 639 | struct nfs_client *clp = lsp->ls_state->owner->so_client; |
| 640 | |
| 641 | spin_lock(&clp->cl_lock); |
| 642 | nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); |
| 643 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 644 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 645 | kfree(lsp); |
| 646 | } |
| 647 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | /* |
| 649 | * Return a compatible lock_state. If no initialized lock_state structure |
| 650 | * exists, return an uninitialized one. |
| 651 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | */ |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 653 | 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] | 654 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 655 | struct nfs4_lock_state *lsp, *new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 657 | for(;;) { |
| 658 | spin_lock(&state->state_lock); |
| 659 | lsp = __nfs4_find_lock_state(state, owner); |
| 660 | if (lsp != NULL) |
| 661 | break; |
| 662 | if (new != NULL) { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 663 | list_add(&new->ls_locks, &state->lock_states); |
| 664 | set_bit(LK_STATE_IN_USE, &state->flags); |
| 665 | lsp = new; |
| 666 | new = NULL; |
| 667 | break; |
| 668 | } |
| 669 | spin_unlock(&state->state_lock); |
| 670 | new = nfs4_alloc_lock_state(state, owner); |
| 671 | if (new == NULL) |
| 672 | return NULL; |
| 673 | } |
| 674 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 675 | if (new != NULL) |
| 676 | nfs4_free_lock_state(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | return lsp; |
| 678 | } |
| 679 | |
| 680 | /* |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 681 | * Release reference to lock_state, and free it if we see that |
| 682 | * it is no longer in use |
| 683 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 684 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 685 | { |
| 686 | struct nfs4_state *state; |
| 687 | |
| 688 | if (lsp == NULL) |
| 689 | return; |
| 690 | state = lsp->ls_state; |
| 691 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
| 692 | return; |
| 693 | list_del(&lsp->ls_locks); |
| 694 | if (list_empty(&state->lock_states)) |
| 695 | clear_bit(LK_STATE_IN_USE, &state->flags); |
| 696 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 697 | nfs4_free_lock_state(lsp); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 698 | } |
| 699 | |
| 700 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
| 701 | { |
| 702 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
| 703 | |
| 704 | dst->fl_u.nfs4_fl.owner = lsp; |
| 705 | atomic_inc(&lsp->ls_count); |
| 706 | } |
| 707 | |
| 708 | static void nfs4_fl_release_lock(struct file_lock *fl) |
| 709 | { |
| 710 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
| 711 | } |
| 712 | |
Alexey Dobriyan | 6aed628 | 2009-09-21 17:01:11 -0700 | [diff] [blame] | 713 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 714 | .fl_copy_lock = nfs4_fl_copy_lock, |
| 715 | .fl_release_private = nfs4_fl_release_lock, |
| 716 | }; |
| 717 | |
| 718 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
| 719 | { |
| 720 | struct nfs4_lock_state *lsp; |
| 721 | |
| 722 | if (fl->fl_ops != NULL) |
| 723 | return 0; |
| 724 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
| 725 | if (lsp == NULL) |
| 726 | return -ENOMEM; |
| 727 | fl->fl_u.nfs4_fl.owner = lsp; |
| 728 | fl->fl_ops = &nfs4_fl_lock_ops; |
| 729 | return 0; |
| 730 | } |
| 731 | |
| 732 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | * Byte-range lock aware utility to initialize the stateid of read/write |
| 734 | * requests. |
| 735 | */ |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 736 | 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] | 737 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 738 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 739 | int seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 741 | do { |
| 742 | seq = read_seqbegin(&state->seqlock); |
| 743 | memcpy(dst, &state->stateid, sizeof(*dst)); |
| 744 | } while (read_seqretry(&state->seqlock, seq)); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 745 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
| 746 | return; |
| 747 | |
| 748 | spin_lock(&state->state_lock); |
| 749 | lsp = __nfs4_find_lock_state(state, fl_owner); |
| 750 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
| 751 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); |
| 752 | spin_unlock(&state->state_lock); |
| 753 | nfs4_put_lock_state(lsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | } |
| 755 | |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 756 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 758 | struct nfs_seqid *new; |
| 759 | |
| 760 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
| 761 | if (new != NULL) { |
| 762 | new->sequence = counter; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 763 | INIT_LIST_HEAD(&new->list); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 764 | } |
| 765 | return new; |
| 766 | } |
| 767 | |
| 768 | void nfs_free_seqid(struct nfs_seqid *seqid) |
| 769 | { |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 770 | if (!list_empty(&seqid->list)) { |
| 771 | struct rpc_sequence *sequence = seqid->sequence->sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 772 | |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 773 | spin_lock(&sequence->lock); |
| 774 | list_del(&seqid->list); |
| 775 | spin_unlock(&sequence->lock); |
| 776 | rpc_wake_up(&sequence->wait); |
| 777 | } |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 778 | kfree(seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | } |
| 780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 782 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
| 783 | * failed with a seqid incrementing error - |
| 784 | * see comments nfs_fs.h:seqid_mutating_error() |
| 785 | */ |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 786 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | { |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 788 | 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] | 789 | switch (status) { |
| 790 | case 0: |
| 791 | break; |
| 792 | case -NFS4ERR_BAD_SEQID: |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 793 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
| 794 | return; |
| 795 | printk(KERN_WARNING "NFS: v4 server returned a bad" |
Dan Muntz | 497799e | 2008-02-13 13:09:35 -0800 | [diff] [blame] | 796 | " sequence-id error on an" |
| 797 | " unconfirmed sequence %p!\n", |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 798 | seqid->sequence); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 799 | case -NFS4ERR_STALE_CLIENTID: |
| 800 | case -NFS4ERR_STALE_STATEID: |
| 801 | case -NFS4ERR_BAD_STATEID: |
| 802 | case -NFS4ERR_BADXDR: |
| 803 | case -NFS4ERR_RESOURCE: |
| 804 | case -NFS4ERR_NOFILEHANDLE: |
| 805 | /* Non-seqid mutating errors */ |
| 806 | return; |
| 807 | }; |
| 808 | /* |
| 809 | * Note: no locking needed as we are guaranteed to be first |
| 810 | * on the sequence list |
| 811 | */ |
| 812 | seqid->sequence->counter++; |
| 813 | } |
| 814 | |
| 815 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) |
| 816 | { |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 817 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
| 818 | struct nfs4_state_owner, so_seqid); |
| 819 | struct nfs_server *server = sp->so_server; |
| 820 | |
| 821 | if (status == -NFS4ERR_BAD_SEQID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | nfs4_drop_state_owner(sp); |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 823 | if (!nfs4_has_session(server->nfs_client)) |
| 824 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 825 | } |
| 826 | |
| 827 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 828 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
| 829 | * failed with a seqid incrementing error - |
| 830 | * see comments nfs_fs.h:seqid_mutating_error() |
| 831 | */ |
| 832 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) |
| 833 | { |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 834 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) |
| 838 | { |
| 839 | struct rpc_sequence *sequence = seqid->sequence->sequence; |
| 840 | int status = 0; |
| 841 | |
| 842 | spin_lock(&sequence->lock); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 843 | if (list_empty(&seqid->list)) |
| 844 | list_add_tail(&seqid->list, &sequence->list); |
| 845 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) |
| 846 | goto unlock; |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 847 | rpc_sleep_on(&sequence->wait, task, NULL); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 848 | status = -EAGAIN; |
| 849 | unlock: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 850 | spin_unlock(&sequence->lock); |
| 851 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | } |
| 853 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 854 | static int nfs4_run_state_manager(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 856 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 857 | { |
| 858 | smp_mb__before_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 859 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 860 | smp_mb__after_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 861 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 862 | rpc_wake_up(&clp->cl_rpcwaitq); |
| 863 | } |
| 864 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | /* |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 866 | * Schedule the nfs_client asynchronous state management routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | */ |
Trond Myklebust | b0d3ded | 2008-12-23 15:21:50 -0500 | [diff] [blame] | 868 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | { |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 870 | struct task_struct *task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 872 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 873 | return; |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 874 | __module_get(THIS_MODULE); |
| 875 | atomic_inc(&clp->cl_count); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 876 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 877 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 878 | RPC_DISPLAY_ADDR)); |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 879 | if (!IS_ERR(task)) |
| 880 | return; |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 881 | nfs4_clear_state_manager_bit(clp); |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 882 | nfs_put_client(clp); |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 883 | module_put(THIS_MODULE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | } |
| 885 | |
| 886 | /* |
| 887 | * Schedule a state recovery attempt |
| 888 | */ |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 889 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | { |
| 891 | if (!clp) |
| 892 | return; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 893 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 894 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 895 | nfs4_schedule_state_manager(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
| 897 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 898 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
| 899 | { |
| 900 | |
| 901 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 902 | /* Don't recover state that expired before the reboot */ |
| 903 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { |
| 904 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 905 | return 0; |
| 906 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 907 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 908 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 909 | return 1; |
| 910 | } |
| 911 | |
Trond Myklebust | 9e33bed | 2008-12-23 15:21:46 -0500 | [diff] [blame] | 912 | 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] | 913 | { |
| 914 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 915 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 916 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 917 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
| 918 | return 1; |
| 919 | } |
| 920 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 921 | 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] | 922 | { |
| 923 | struct inode *inode = state->inode; |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 924 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | struct file_lock *fl; |
| 926 | int status = 0; |
| 927 | |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 928 | if (inode->i_flock == NULL) |
| 929 | return 0; |
| 930 | |
| 931 | /* Guard against delegation returns and new lock/unlock calls */ |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 932 | down_write(&nfsi->rwsem); |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 933 | /* Protect inode->i_flock using the BKL */ |
| 934 | lock_kernel(); |
Harvey Harrison | 90dc7d2 | 2008-02-20 13:03:05 -0800 | [diff] [blame] | 935 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 936 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | continue; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 938 | if (nfs_file_open_context(fl->fl_file)->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | continue; |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 940 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | status = ops->recover_lock(state, fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | switch (status) { |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 943 | case 0: |
| 944 | break; |
| 945 | case -ESTALE: |
| 946 | case -NFS4ERR_ADMIN_REVOKED: |
| 947 | case -NFS4ERR_STALE_STATEID: |
| 948 | case -NFS4ERR_BAD_STATEID: |
| 949 | case -NFS4ERR_EXPIRED: |
| 950 | case -NFS4ERR_NO_GRACE: |
| 951 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 952 | case -NFS4ERR_BADSESSION: |
| 953 | case -NFS4ERR_BADSLOT: |
| 954 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 955 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 956 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | default: |
| 958 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 959 | __func__, status); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 960 | case -ENOMEM: |
| 961 | case -NFS4ERR_DENIED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | case -NFS4ERR_RECLAIM_BAD: |
| 963 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 964 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 965 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | } |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 967 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | } |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 969 | unlock_kernel(); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 970 | out: |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 971 | up_write(&nfsi->rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | return status; |
| 973 | } |
| 974 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 975 | 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] | 976 | { |
| 977 | struct nfs4_state *state; |
| 978 | struct nfs4_lock_state *lock; |
| 979 | int status = 0; |
| 980 | |
| 981 | /* Note: we rely on the sp->so_states list being ordered |
| 982 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) |
| 983 | * states first. |
| 984 | * This is needed to ensure that the server won't give us any |
| 985 | * read delegations that we have to return if, say, we are |
| 986 | * recovering after a network partition or a reboot from a |
| 987 | * server that doesn't support a grace period. |
| 988 | */ |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 989 | restart: |
| 990 | spin_lock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 992 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
| 993 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | if (state->state == 0) |
| 995 | continue; |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 996 | atomic_inc(&state->count); |
| 997 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | status = ops->recover_open(sp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | if (status >= 0) { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1000 | status = nfs4_reclaim_locks(state, ops); |
| 1001 | if (status >= 0) { |
| 1002 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
| 1003 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) |
| 1004 | printk("%s: Lock reclaim failed!\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1005 | __func__); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1006 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1007 | nfs4_put_open_state(state); |
| 1008 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | } |
| 1011 | switch (status) { |
| 1012 | default: |
| 1013 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1014 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | case -ENOENT: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1016 | case -ENOMEM: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1017 | case -ESTALE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | /* |
| 1019 | * Open state on this file cannot be recovered |
| 1020 | * All we can do is revert to using the zero stateid. |
| 1021 | */ |
| 1022 | memset(state->stateid.data, 0, |
| 1023 | sizeof(state->stateid.data)); |
| 1024 | /* Mark the file as being 'closed' */ |
| 1025 | state->state = 0; |
| 1026 | break; |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1027 | case -NFS4ERR_ADMIN_REVOKED: |
| 1028 | case -NFS4ERR_STALE_STATEID: |
| 1029 | case -NFS4ERR_BAD_STATEID: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1030 | case -NFS4ERR_RECLAIM_BAD: |
| 1031 | case -NFS4ERR_RECLAIM_CONFLICT: |
| 1032 | nfs4_state_mark_reclaim_nograce(sp->so_client, state); |
| 1033 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | case -NFS4ERR_EXPIRED: |
| 1035 | case -NFS4ERR_NO_GRACE: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1036 | nfs4_state_mark_reclaim_nograce(sp->so_client, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1038 | case -NFS4ERR_BADSESSION: |
| 1039 | case -NFS4ERR_BADSLOT: |
| 1040 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1041 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | goto out_err; |
| 1043 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1044 | nfs4_put_open_state(state); |
| 1045 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1047 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | return 0; |
| 1049 | out_err: |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1050 | nfs4_put_open_state(state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | return status; |
| 1052 | } |
| 1053 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1054 | static void nfs4_clear_open_state(struct nfs4_state *state) |
| 1055 | { |
| 1056 | struct nfs4_lock_state *lock; |
| 1057 | |
| 1058 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1059 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1060 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1061 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1062 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1063 | lock->ls_seqid.flags = 0; |
| 1064 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; |
| 1065 | } |
| 1066 | } |
| 1067 | |
| 1068 | 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] | 1069 | { |
| 1070 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1071 | struct rb_node *pos; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1072 | struct nfs4_state *state; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1073 | |
| 1074 | /* Reset all sequence ids to zero */ |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1075 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 1076 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1077 | sp->so_seqid.flags = 0; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1078 | spin_lock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1079 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1080 | if (mark_reclaim(clp, state)) |
| 1081 | nfs4_clear_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1082 | } |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1083 | spin_unlock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1084 | } |
| 1085 | } |
| 1086 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1087 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
| 1088 | { |
| 1089 | /* Mark all delegations for reclaim */ |
| 1090 | nfs_delegation_mark_reclaim(clp); |
| 1091 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); |
| 1092 | } |
| 1093 | |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1094 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
| 1095 | const struct nfs4_state_recovery_ops *ops) |
| 1096 | { |
| 1097 | /* Notify the server we're done reclaiming our state */ |
| 1098 | if (ops->reclaim_complete) |
| 1099 | (void)ops->reclaim_complete(clp); |
| 1100 | } |
| 1101 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1102 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
| 1103 | { |
| 1104 | struct nfs4_state_owner *sp; |
| 1105 | struct rb_node *pos; |
| 1106 | struct nfs4_state *state; |
| 1107 | |
| 1108 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1109 | return; |
| 1110 | |
Ricardo Labiaga | 7cab89b | 2009-12-08 14:35:28 -0500 | [diff] [blame] | 1111 | nfs4_reclaim_complete(clp, |
| 1112 | nfs4_reboot_recovery_ops[clp->cl_minorversion]); |
| 1113 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1114 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 1115 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
| 1116 | spin_lock(&sp->so_lock); |
| 1117 | list_for_each_entry(state, &sp->so_states, open_states) { |
| 1118 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) |
| 1119 | continue; |
| 1120 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1121 | } |
| 1122 | spin_unlock(&sp->so_lock); |
| 1123 | } |
| 1124 | |
| 1125 | nfs_delegation_reap_unclaimed(clp); |
| 1126 | } |
| 1127 | |
| 1128 | static void nfs_delegation_clear_all(struct nfs_client *clp) |
| 1129 | { |
| 1130 | nfs_delegation_mark_reclaim(clp); |
| 1131 | nfs_delegation_reap_unclaimed(clp); |
| 1132 | } |
| 1133 | |
| 1134 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
| 1135 | { |
| 1136 | nfs_delegation_clear_all(clp); |
| 1137 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 1138 | } |
| 1139 | |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1140 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1141 | { |
| 1142 | switch (error) { |
| 1143 | case -NFS4ERR_CB_PATH_DOWN: |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1144 | nfs_handle_cb_pathdown(clp); |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1145 | return 0; |
Trond Myklebust | c8b7ae3d | 2009-12-03 15:53:21 -0500 | [diff] [blame] | 1146 | case -NFS4ERR_NO_GRACE: |
| 1147 | nfs4_state_end_reclaim_reboot(clp); |
| 1148 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1149 | case -NFS4ERR_STALE_CLIENTID: |
| 1150 | case -NFS4ERR_LEASE_MOVED: |
| 1151 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 1152 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1153 | nfs4_state_start_reclaim_reboot(clp); |
| 1154 | break; |
| 1155 | case -NFS4ERR_EXPIRED: |
| 1156 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1157 | nfs4_state_start_reclaim_nograce(clp); |
Andy Adamson | 8ba9bf8 | 2009-12-04 15:55:34 -0500 | [diff] [blame] | 1158 | break; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1159 | case -NFS4ERR_BADSESSION: |
| 1160 | case -NFS4ERR_BADSLOT: |
| 1161 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1162 | case -NFS4ERR_DEADSESSION: |
| 1163 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1164 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 1165 | case -NFS4ERR_SEQ_MISORDERED: |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1166 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 0b9e2d4 | 2009-12-04 16:02:14 -0500 | [diff] [blame] | 1167 | /* Zero session reset errors */ |
| 1168 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1169 | } |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1170 | return error; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1171 | } |
| 1172 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1173 | 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] | 1174 | { |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1175 | struct rb_node *pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | int status = 0; |
| 1177 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1178 | restart: |
| 1179 | spin_lock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1180 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 1181 | 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] | 1182 | if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) |
| 1183 | continue; |
| 1184 | atomic_inc(&sp->so_count); |
| 1185 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1186 | status = nfs4_reclaim_open_state(sp, ops); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1187 | if (status < 0) { |
| 1188 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
| 1189 | nfs4_put_state_owner(sp); |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1190 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1191 | } |
| 1192 | nfs4_put_state_owner(sp); |
| 1193 | goto restart; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1194 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1195 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1196 | return status; |
| 1197 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1199 | static int nfs4_check_lease(struct nfs_client *clp) |
| 1200 | { |
| 1201 | struct rpc_cred *cred; |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1202 | struct nfs4_state_maintenance_ops *ops = |
| 1203 | nfs4_state_renewal_ops[clp->cl_minorversion]; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1204 | int status = -NFS4ERR_EXPIRED; |
| 1205 | |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1206 | /* Is the client already known to have an expired lease? */ |
| 1207 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1208 | return 0; |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 1209 | spin_lock(&clp->cl_lock); |
| 1210 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1211 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1212 | if (cred == NULL) { |
| 1213 | cred = nfs4_get_setclientid_cred(clp); |
| 1214 | if (cred == NULL) |
| 1215 | goto out; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1216 | } |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1217 | status = ops->renew_lease(clp, cred); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1218 | put_rpccred(cred); |
| 1219 | out: |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1220 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1221 | } |
| 1222 | |
| 1223 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
| 1224 | { |
| 1225 | struct rpc_cred *cred; |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1226 | struct nfs4_state_recovery_ops *ops = |
| 1227 | nfs4_reboot_recovery_ops[clp->cl_minorversion]; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1228 | int status = -ENOENT; |
| 1229 | |
Andy Adamson | 90a1661 | 2009-04-01 09:22:48 -0400 | [diff] [blame] | 1230 | cred = ops->get_clid_cred(clp); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1231 | if (cred != NULL) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1232 | status = ops->establish_clid(clp, cred); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1233 | put_rpccred(cred); |
| 1234 | /* Handle case where the user hasn't set up machine creds */ |
| 1235 | if (status == -EACCES && cred == clp->cl_machine_cred) { |
| 1236 | nfs4_clear_machine_cred(clp); |
| 1237 | status = -EAGAIN; |
| 1238 | } |
Benny Halevy | c2e713d | 2009-04-01 09:21:51 -0400 | [diff] [blame] | 1239 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
| 1240 | status = -EPROTONOSUPPORT; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1241 | } |
| 1242 | return status; |
| 1243 | } |
| 1244 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1245 | #ifdef CONFIG_NFS_V4_1 |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1246 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
| 1247 | { |
| 1248 | if (!flags) |
| 1249 | return; |
| 1250 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) { |
| 1251 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1252 | nfs4_state_start_reclaim_reboot(clp); |
| 1253 | nfs4_schedule_state_recovery(clp); |
| 1254 | } else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
| 1255 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
| 1256 | SEQ4_STATUS_ADMIN_STATE_REVOKED | |
| 1257 | SEQ4_STATUS_RECALLABLE_STATE_REVOKED | |
| 1258 | SEQ4_STATUS_LEASE_MOVED)) { |
| 1259 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1260 | nfs4_state_start_reclaim_nograce(clp); |
| 1261 | nfs4_schedule_state_recovery(clp); |
| 1262 | } else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
| 1263 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
| 1264 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
| 1265 | nfs_expire_all_delegations(clp); |
| 1266 | } |
| 1267 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1268 | static int nfs4_reset_session(struct nfs_client *clp) |
| 1269 | { |
| 1270 | int status; |
| 1271 | |
| 1272 | status = nfs4_proc_destroy_session(clp->cl_session); |
| 1273 | if (status && status != -NFS4ERR_BADSESSION && |
| 1274 | status != -NFS4ERR_DEADSESSION) { |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 1275 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1276 | goto out; |
| 1277 | } |
| 1278 | |
| 1279 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
Trond Myklebust | f26468f | 2009-12-05 19:32:11 -0500 | [diff] [blame] | 1280 | status = nfs4_proc_create_session(clp); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1281 | if (status) |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 1282 | status = nfs4_recovery_handle_error(clp, status); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 1283 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1284 | out: |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 1285 | /* |
| 1286 | * Let the state manager reestablish state |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 1287 | */ |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame^] | 1288 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
| 1289 | status == 0) |
| 1290 | nfs41_setup_state_renewal(clp); |
| 1291 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1292 | return status; |
| 1293 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1294 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1295 | #else /* CONFIG_NFS_V4_1 */ |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1296 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame^] | 1297 | static int nfs4_begin_drain_session(struct nfs_client *clp) { return 0; } |
| 1298 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1299 | #endif /* CONFIG_NFS_V4_1 */ |
| 1300 | |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1301 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
| 1302 | * on EXCHANGE_ID for v4.1 |
| 1303 | */ |
| 1304 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) |
| 1305 | { |
| 1306 | if (nfs4_has_session(clp)) { |
| 1307 | switch (status) { |
| 1308 | case -NFS4ERR_DELAY: |
| 1309 | case -NFS4ERR_CLID_INUSE: |
| 1310 | case -EAGAIN: |
| 1311 | break; |
| 1312 | |
| 1313 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 1314 | * in nfs4_exchange_id */ |
| 1315 | default: |
| 1316 | return; |
| 1317 | } |
| 1318 | } |
| 1319 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1320 | } |
| 1321 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1322 | static void nfs4_state_manager(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1323 | { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1324 | int status = 0; |
| 1325 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1326 | /* Ensure exclusive access to NFSv4 state */ |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1327 | for(;;) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1328 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
| 1329 | /* We're going to have to re-establish a clientid */ |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame^] | 1330 | nfs4_begin_drain_session(clp); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1331 | status = nfs4_reclaim_lease(clp); |
| 1332 | if (status) { |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1333 | nfs4_set_lease_expired(clp, status); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1334 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
| 1335 | &clp->cl_state)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1336 | continue; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1337 | if (clp->cl_cons_state == |
| 1338 | NFS_CS_SESSION_INITING) |
| 1339 | nfs_mark_client_ready(clp, status); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1340 | goto out_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | } |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1342 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Ricardo Labiaga | 7cab89b | 2009-12-08 14:35:28 -0500 | [diff] [blame] | 1343 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1344 | } |
| 1345 | |
| 1346 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
| 1347 | status = nfs4_check_lease(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1348 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1349 | continue; |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1350 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
| 1351 | goto out_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1353 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1354 | /* Initialize or reset the session */ |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1355 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
Trond Myklebust | 7111dc7 | 2009-08-24 19:21:29 -0400 | [diff] [blame] | 1356 | && nfs4_has_session(clp)) { |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame^] | 1357 | nfs4_begin_drain_session(clp); |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 1358 | status = nfs4_reset_session(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1359 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1360 | continue; |
| 1361 | if (status < 0) |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1362 | goto out_error; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1363 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1364 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1365 | /* First recover reboot state... */ |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 1366 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1367 | status = nfs4_do_reclaim(clp, |
| 1368 | nfs4_reboot_recovery_ops[clp->cl_minorversion]); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1369 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1370 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1371 | continue; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1372 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1373 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 1374 | continue; |
| 1375 | if (status < 0) |
| 1376 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1377 | } |
| 1378 | |
| 1379 | /* Now recover expired state... */ |
| 1380 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1381 | status = nfs4_do_reclaim(clp, |
| 1382 | nfs4_nograce_recovery_ops[clp->cl_minorversion]); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1383 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1384 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1385 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1386 | continue; |
| 1387 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1388 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1389 | } |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1390 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame^] | 1391 | nfs4_end_drain_session(clp); |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1392 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
| 1393 | nfs_client_return_marked_delegations(clp); |
| 1394 | continue; |
| 1395 | } |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1396 | |
| 1397 | nfs4_clear_state_manager_bit(clp); |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1398 | /* Did we race with an attempt to give us more work? */ |
| 1399 | if (clp->cl_state == 0) |
| 1400 | break; |
| 1401 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1402 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | } |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1404 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | out_error: |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1406 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 1407 | " with error %d\n", clp->cl_hostname, -status); |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame^] | 1408 | nfs4_end_drain_session(clp); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1409 | nfs4_clear_state_manager_bit(clp); |
| 1410 | } |
| 1411 | |
| 1412 | static int nfs4_run_state_manager(void *ptr) |
| 1413 | { |
| 1414 | struct nfs_client *clp = ptr; |
| 1415 | |
| 1416 | allow_signal(SIGKILL); |
| 1417 | nfs4_state_manager(clp); |
| 1418 | nfs_put_client(clp); |
| 1419 | module_put_and_exit(0); |
| 1420 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | } |
| 1422 | |
| 1423 | /* |
| 1424 | * Local variables: |
| 1425 | * c-basic-offset: 8 |
| 1426 | * End: |
| 1427 | */ |