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> |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 43 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Randy Dunlap | 8c7597f | 2010-10-22 16:18:52 -0700 | [diff] [blame] | 49 | #include <linux/ratelimit.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <linux/workqueue.h> |
| 51 | #include <linux/bitops.h> |
| 52 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 53 | #include "nfs4_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #include "callback.h" |
| 55 | #include "delegation.h" |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 56 | #include "internal.h" |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 57 | #include "pnfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | #define OPENOWNER_POOL_SIZE 8 |
| 60 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 61 | const nfs4_stateid zero_stateid; |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | static LIST_HEAD(nfs4_clientid_list); |
| 64 | |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 65 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 67 | struct nfs4_setclientid_res clid; |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 68 | unsigned short port; |
| 69 | int status; |
| 70 | |
| 71 | port = nfs_callback_tcpport; |
| 72 | if (clp->cl_addr.ss_family == AF_INET6) |
| 73 | port = nfs_callback_tcpport6; |
| 74 | |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 75 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
| 76 | if (status != 0) |
| 77 | goto out; |
| 78 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
| 79 | if (status != 0) |
| 80 | goto out; |
| 81 | clp->cl_clientid = clid.clientid; |
| 82 | nfs4_schedule_state_renewal(clp); |
| 83 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | return status; |
| 85 | } |
| 86 | |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 87 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 88 | { |
| 89 | struct rpc_cred *cred = NULL; |
| 90 | |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 91 | if (clp->cl_machine_cred != NULL) |
| 92 | cred = get_rpccred(clp->cl_machine_cred); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 93 | return cred; |
| 94 | } |
| 95 | |
| 96 | static void nfs4_clear_machine_cred(struct nfs_client *clp) |
| 97 | { |
| 98 | struct rpc_cred *cred; |
| 99 | |
| 100 | spin_lock(&clp->cl_lock); |
| 101 | cred = clp->cl_machine_cred; |
| 102 | clp->cl_machine_cred = NULL; |
| 103 | spin_unlock(&clp->cl_lock); |
| 104 | if (cred != NULL) |
| 105 | put_rpccred(cred); |
| 106 | } |
| 107 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 108 | static struct rpc_cred * |
| 109 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 110 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 111 | struct rpc_cred *cred = NULL; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 112 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 113 | struct rb_node *pos; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 114 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 115 | for (pos = rb_first(&server->state_owners); |
| 116 | pos != NULL; |
| 117 | pos = rb_next(pos)) { |
| 118 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 119 | if (list_empty(&sp->so_states)) |
| 120 | continue; |
| 121 | cred = get_rpccred(sp->so_cred); |
| 122 | break; |
| 123 | } |
| 124 | return cred; |
| 125 | } |
| 126 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 127 | /** |
| 128 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation |
| 129 | * @clp: client state handle |
| 130 | * |
| 131 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 132 | * Caller must hold clp->cl_lock. |
| 133 | */ |
| 134 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) |
| 135 | { |
| 136 | struct rpc_cred *cred = NULL; |
| 137 | struct nfs_server *server; |
| 138 | |
| 139 | rcu_read_lock(); |
| 140 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 141 | cred = nfs4_get_renew_cred_server_locked(server); |
| 142 | if (cred != NULL) |
| 143 | break; |
| 144 | } |
| 145 | rcu_read_unlock(); |
| 146 | return cred; |
| 147 | } |
| 148 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 149 | #if defined(CONFIG_NFS_V4_1) |
| 150 | |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 151 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
| 152 | { |
| 153 | int status; |
| 154 | struct nfs_fsinfo fsinfo; |
| 155 | |
| 156 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
| 157 | if (status == 0) { |
| 158 | /* Update lease time and schedule renewal */ |
| 159 | spin_lock(&clp->cl_lock); |
| 160 | clp->cl_lease_time = fsinfo.lease_time * HZ; |
| 161 | clp->cl_last_renewal = jiffies; |
| 162 | spin_unlock(&clp->cl_lock); |
| 163 | |
| 164 | nfs4_schedule_state_renewal(clp); |
| 165 | } |
| 166 | |
| 167 | return status; |
| 168 | } |
| 169 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 170 | /* |
| 171 | * Back channel returns NFS4ERR_DELAY for new requests when |
| 172 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining |
| 173 | * is ended. |
| 174 | */ |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 175 | static void nfs4_end_drain_session(struct nfs_client *clp) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 176 | { |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 177 | struct nfs4_session *ses = clp->cl_session; |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 178 | int max_slots; |
| 179 | |
Trond Myklebust | a2118c3 | 2010-06-16 09:52:26 -0400 | [diff] [blame] | 180 | if (ses == NULL) |
| 181 | return; |
| 182 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 183 | spin_lock(&ses->fc_slot_table.slot_tbl_lock); |
| 184 | max_slots = ses->fc_slot_table.max_slots; |
| 185 | while (max_slots--) { |
| 186 | struct rpc_task *task; |
| 187 | |
| 188 | task = rpc_wake_up_next(&ses->fc_slot_table. |
| 189 | slot_tbl_waitq); |
| 190 | if (!task) |
| 191 | break; |
| 192 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 193 | } |
| 194 | spin_unlock(&ses->fc_slot_table.slot_tbl_lock); |
| 195 | } |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 196 | } |
| 197 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 198 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 199 | { |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 200 | spin_lock(&tbl->slot_tbl_lock); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 201 | if (tbl->highest_used_slotid != -1) { |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 202 | INIT_COMPLETION(tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 203 | spin_unlock(&tbl->slot_tbl_lock); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 204 | return wait_for_completion_interruptible(&tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 205 | } |
| 206 | spin_unlock(&tbl->slot_tbl_lock); |
| 207 | return 0; |
| 208 | } |
| 209 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 210 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
| 211 | { |
| 212 | struct nfs4_session *ses = clp->cl_session; |
| 213 | int ret = 0; |
| 214 | |
| 215 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); |
| 216 | /* back channel */ |
| 217 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); |
| 218 | if (ret) |
| 219 | return ret; |
| 220 | /* fore channel */ |
| 221 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); |
| 222 | } |
| 223 | |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 224 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
| 225 | { |
| 226 | int status; |
| 227 | |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 228 | nfs4_begin_drain_session(clp); |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 229 | status = nfs4_proc_exchange_id(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 230 | if (status != 0) |
| 231 | goto out; |
| 232 | status = nfs4_proc_create_session(clp); |
| 233 | if (status != 0) |
| 234 | goto out; |
Andy Adamson | 2c2618c | 2011-01-06 02:04:31 +0000 | [diff] [blame] | 235 | status = nfs4_set_callback_sessionid(clp); |
| 236 | if (status != 0) { |
| 237 | printk(KERN_WARNING "Sessionid not set. No callback service\n"); |
| 238 | nfs_callback_down(1); |
| 239 | status = 0; |
| 240 | } |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 241 | nfs41_setup_state_renewal(clp); |
| 242 | nfs_mark_client_ready(clp, NFS_CS_READY); |
| 243 | out: |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 244 | return status; |
| 245 | } |
| 246 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 247 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
| 248 | { |
| 249 | struct rpc_cred *cred; |
| 250 | |
| 251 | spin_lock(&clp->cl_lock); |
| 252 | cred = nfs4_get_machine_cred_locked(clp); |
| 253 | spin_unlock(&clp->cl_lock); |
| 254 | return cred; |
| 255 | } |
| 256 | |
| 257 | #endif /* CONFIG_NFS_V4_1 */ |
| 258 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 259 | static struct rpc_cred * |
| 260 | nfs4_get_setclientid_cred_server(struct nfs_server *server) |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 261 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 262 | struct nfs_client *clp = server->nfs_client; |
| 263 | struct rpc_cred *cred = NULL; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 264 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 265 | struct rb_node *pos; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 266 | |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 267 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 268 | pos = rb_first(&server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 269 | if (pos != NULL) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 270 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 271 | cred = get_rpccred(sp->so_cred); |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 272 | } |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 273 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 274 | return cred; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 275 | } |
| 276 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 277 | /** |
| 278 | * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation |
| 279 | * @clp: client state handle |
| 280 | * |
| 281 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 282 | */ |
| 283 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
| 284 | { |
| 285 | struct nfs_server *server; |
| 286 | struct rpc_cred *cred; |
| 287 | |
| 288 | spin_lock(&clp->cl_lock); |
| 289 | cred = nfs4_get_machine_cred_locked(clp); |
| 290 | spin_unlock(&clp->cl_lock); |
| 291 | if (cred != NULL) |
| 292 | goto out; |
| 293 | |
| 294 | rcu_read_lock(); |
| 295 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 296 | cred = nfs4_get_setclientid_cred_server(server); |
| 297 | if (cred != NULL) |
| 298 | break; |
| 299 | } |
| 300 | rcu_read_unlock(); |
| 301 | |
| 302 | out: |
| 303 | return cred; |
| 304 | } |
| 305 | |
| 306 | static void nfs_alloc_unique_id_locked(struct rb_root *root, |
| 307 | struct nfs_unique_id *new, |
| 308 | __u64 minval, int maxbits) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 309 | { |
| 310 | struct rb_node **p, *parent; |
| 311 | struct nfs_unique_id *pos; |
| 312 | __u64 mask = ~0ULL; |
| 313 | |
| 314 | if (maxbits < 64) |
| 315 | mask = (1ULL << maxbits) - 1ULL; |
| 316 | |
| 317 | /* Ensure distribution is more or less flat */ |
| 318 | get_random_bytes(&new->id, sizeof(new->id)); |
| 319 | new->id &= mask; |
| 320 | if (new->id < minval) |
| 321 | new->id += minval; |
| 322 | retry: |
| 323 | p = &root->rb_node; |
| 324 | parent = NULL; |
| 325 | |
| 326 | while (*p != NULL) { |
| 327 | parent = *p; |
| 328 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); |
| 329 | |
| 330 | if (new->id < pos->id) |
| 331 | p = &(*p)->rb_left; |
| 332 | else if (new->id > pos->id) |
| 333 | p = &(*p)->rb_right; |
| 334 | else |
| 335 | goto id_exists; |
| 336 | } |
| 337 | rb_link_node(&new->rb_node, parent, p); |
| 338 | rb_insert_color(&new->rb_node, root); |
| 339 | return; |
| 340 | id_exists: |
| 341 | for (;;) { |
| 342 | new->id++; |
| 343 | if (new->id < minval || (new->id & mask) != new->id) { |
| 344 | new->id = minval; |
| 345 | break; |
| 346 | } |
| 347 | parent = rb_next(parent); |
| 348 | if (parent == NULL) |
| 349 | break; |
| 350 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); |
| 351 | if (new->id < pos->id) |
| 352 | break; |
| 353 | } |
| 354 | goto retry; |
| 355 | } |
| 356 | |
| 357 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) |
| 358 | { |
| 359 | rb_erase(&id->rb_node, root); |
| 360 | } |
| 361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 363 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 365 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 366 | *parent = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | struct nfs4_state_owner *sp, *res = NULL; |
| 368 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 369 | while (*p != NULL) { |
| 370 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 371 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 372 | |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 373 | if (server < sp->so_server) { |
| 374 | p = &parent->rb_left; |
| 375 | continue; |
| 376 | } |
| 377 | if (server > sp->so_server) { |
| 378 | p = &parent->rb_right; |
| 379 | continue; |
| 380 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 381 | if (cred < sp->so_cred) |
| 382 | p = &parent->rb_left; |
| 383 | else if (cred > sp->so_cred) |
| 384 | p = &parent->rb_right; |
| 385 | else { |
| 386 | atomic_inc(&sp->so_count); |
| 387 | res = sp; |
| 388 | break; |
| 389 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | return res; |
| 392 | } |
| 393 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 394 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 395 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 396 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 397 | struct nfs_server *server = new->so_server; |
| 398 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 399 | *parent = NULL; |
| 400 | struct nfs4_state_owner *sp; |
| 401 | |
| 402 | while (*p != NULL) { |
| 403 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 404 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 405 | |
| 406 | if (new->so_cred < sp->so_cred) |
| 407 | p = &parent->rb_left; |
| 408 | else if (new->so_cred > sp->so_cred) |
| 409 | p = &parent->rb_right; |
| 410 | else { |
| 411 | atomic_inc(&sp->so_count); |
| 412 | return sp; |
| 413 | } |
| 414 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 415 | nfs_alloc_unique_id_locked(&server->openowner_id, |
| 416 | &new->so_owner_id, 1, 64); |
| 417 | rb_link_node(&new->so_server_node, parent, p); |
| 418 | rb_insert_color(&new->so_server_node, &server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 419 | return new; |
| 420 | } |
| 421 | |
| 422 | static void |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 423 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 424 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 425 | struct nfs_server *server = sp->so_server; |
| 426 | |
| 427 | if (!RB_EMPTY_NODE(&sp->so_server_node)) |
| 428 | rb_erase(&sp->so_server_node, &server->state_owners); |
| 429 | nfs_free_unique_id(&server->openowner_id, &sp->so_owner_id); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 430 | } |
| 431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | /* |
| 433 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to |
| 434 | * create a new state_owner. |
| 435 | * |
| 436 | */ |
| 437 | static struct nfs4_state_owner * |
| 438 | nfs4_alloc_state_owner(void) |
| 439 | { |
| 440 | struct nfs4_state_owner *sp; |
| 441 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 442 | sp = kzalloc(sizeof(*sp),GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | if (!sp) |
| 444 | return NULL; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 445 | spin_lock_init(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | INIT_LIST_HEAD(&sp->so_states); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 447 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
| 448 | sp->so_seqid.sequence = &sp->so_sequence; |
| 449 | spin_lock_init(&sp->so_sequence.lock); |
| 450 | INIT_LIST_HEAD(&sp->so_sequence.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | atomic_set(&sp->so_count, 1); |
| 452 | return sp; |
| 453 | } |
| 454 | |
Adrian Bunk | 1d2e88e | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 455 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
| 457 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 458 | if (!RB_EMPTY_NODE(&sp->so_server_node)) { |
| 459 | struct nfs_server *server = sp->so_server; |
| 460 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 461 | |
| 462 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 463 | rb_erase(&sp->so_server_node, &server->state_owners); |
| 464 | RB_CLEAR_NODE(&sp->so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 465 | spin_unlock(&clp->cl_lock); |
| 466 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | } |
| 468 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 469 | /** |
| 470 | * nfs4_get_state_owner - Look up a state owner given a credential |
| 471 | * @server: nfs_server to search |
| 472 | * @cred: RPC credential to match |
| 473 | * |
| 474 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. |
| 475 | */ |
| 476 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, |
| 477 | struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 479 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | struct nfs4_state_owner *sp, *new; |
| 481 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 483 | sp = nfs4_find_state_owner_locked(server, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | if (sp != NULL) |
| 486 | return sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 487 | new = nfs4_alloc_state_owner(); |
| 488 | if (new == NULL) |
| 489 | return NULL; |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 490 | new->so_server = server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 491 | new->so_cred = cred; |
| 492 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 493 | sp = nfs4_insert_state_owner_locked(new); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 494 | spin_unlock(&clp->cl_lock); |
| 495 | if (sp == new) |
| 496 | get_rpccred(cred); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 497 | else { |
| 498 | rpc_destroy_wait_queue(&new->so_sequence.wait); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 499 | kfree(new); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 500 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 501 | return sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 504 | /** |
| 505 | * nfs4_put_state_owner - Release a nfs4_state_owner |
| 506 | * @sp: state owner data to release |
| 507 | * |
| 508 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
| 510 | { |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 511 | struct nfs_client *clp = sp->so_server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | struct rpc_cred *cred = sp->so_cred; |
| 513 | |
| 514 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) |
| 515 | return; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 516 | nfs4_remove_state_owner_locked(sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 518 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | put_rpccred(cred); |
| 520 | kfree(sp); |
| 521 | } |
| 522 | |
| 523 | static struct nfs4_state * |
| 524 | nfs4_alloc_open_state(void) |
| 525 | { |
| 526 | struct nfs4_state *state; |
| 527 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 528 | state = kzalloc(sizeof(*state), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | if (!state) |
| 530 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | atomic_set(&state->count, 1); |
| 532 | INIT_LIST_HEAD(&state->lock_states); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 533 | spin_lock_init(&state->state_lock); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 534 | seqlock_init(&state->seqlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | return state; |
| 536 | } |
| 537 | |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 538 | void |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 539 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 540 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 541 | if (state->state == fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 542 | return; |
| 543 | /* NB! List reordering - see the reclaim code for why. */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 544 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
| 545 | if (fmode & FMODE_WRITE) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 546 | list_move(&state->open_states, &state->owner->so_states); |
| 547 | else |
| 548 | list_move_tail(&state->open_states, &state->owner->so_states); |
| 549 | } |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 550 | state->state = fmode; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 551 | } |
| 552 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | static struct nfs4_state * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) |
| 555 | { |
| 556 | struct nfs_inode *nfsi = NFS_I(inode); |
| 557 | struct nfs4_state *state; |
| 558 | |
| 559 | list_for_each_entry(state, &nfsi->open_states, inode_states) { |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 560 | if (state->owner != owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | continue; |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 562 | if (atomic_inc_not_zero(&state->count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | return state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | } |
| 565 | return NULL; |
| 566 | } |
| 567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | static void |
| 569 | nfs4_free_open_state(struct nfs4_state *state) |
| 570 | { |
| 571 | kfree(state); |
| 572 | } |
| 573 | |
| 574 | struct nfs4_state * |
| 575 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) |
| 576 | { |
| 577 | struct nfs4_state *state, *new; |
| 578 | struct nfs_inode *nfsi = NFS_I(inode); |
| 579 | |
| 580 | spin_lock(&inode->i_lock); |
| 581 | state = __nfs4_find_state_byowner(inode, owner); |
| 582 | spin_unlock(&inode->i_lock); |
| 583 | if (state) |
| 584 | goto out; |
| 585 | new = nfs4_alloc_open_state(); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 586 | spin_lock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | spin_lock(&inode->i_lock); |
| 588 | state = __nfs4_find_state_byowner(inode, owner); |
| 589 | if (state == NULL && new != NULL) { |
| 590 | state = new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | state->owner = owner; |
| 592 | atomic_inc(&owner->so_count); |
| 593 | list_add(&state->inode_states, &nfsi->open_states); |
| 594 | state->inode = igrab(inode); |
| 595 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 596 | /* Note: The reclaim code dictates that we add stateless |
| 597 | * and read-only stateids to the end of the list */ |
| 598 | list_add_tail(&state->open_states, &owner->so_states); |
| 599 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | } else { |
| 601 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 602 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | if (new) |
| 604 | nfs4_free_open_state(new); |
| 605 | } |
| 606 | out: |
| 607 | return state; |
| 608 | } |
| 609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | void nfs4_put_open_state(struct nfs4_state *state) |
| 611 | { |
| 612 | struct inode *inode = state->inode; |
| 613 | struct nfs4_state_owner *owner = state->owner; |
| 614 | |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 615 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | return; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 617 | spin_lock(&inode->i_lock); |
Trond Myklebust | ba683031 | 2007-07-27 10:23:05 -0400 | [diff] [blame] | 618 | list_del(&state->inode_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | list_del(&state->open_states); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 620 | spin_unlock(&inode->i_lock); |
| 621 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | nfs4_free_open_state(state); |
| 624 | nfs4_put_state_owner(owner); |
| 625 | } |
| 626 | |
| 627 | /* |
Trond Myklebust | 83c9d41 | 2005-10-18 14:20:13 -0700 | [diff] [blame] | 628 | * Close the current file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | */ |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 630 | static void __nfs4_close(struct path *path, struct nfs4_state *state, |
| 631 | fmode_t fmode, gfp_t gfp_mask, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | struct nfs4_state_owner *owner = state->owner; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 634 | int call_close = 0; |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 635 | fmode_t newstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
| 637 | atomic_inc(&owner->so_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | /* Protect against nfs4_find_state() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 639 | spin_lock(&owner->so_lock); |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 640 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 641 | case FMODE_READ: |
| 642 | state->n_rdonly--; |
| 643 | break; |
| 644 | case FMODE_WRITE: |
| 645 | state->n_wronly--; |
| 646 | break; |
| 647 | case FMODE_READ|FMODE_WRITE: |
| 648 | state->n_rdwr--; |
| 649 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 650 | newstate = FMODE_READ|FMODE_WRITE; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 651 | if (state->n_rdwr == 0) { |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 652 | if (state->n_rdonly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 653 | newstate &= ~FMODE_READ; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 654 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 655 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 656 | } |
| 657 | if (state->n_wronly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 658 | newstate &= ~FMODE_WRITE; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 659 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 660 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 661 | } |
| 662 | if (newstate == 0) |
| 663 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 664 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 665 | nfs4_state_set_mode_locked(state, newstate); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 666 | spin_unlock(&owner->so_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 667 | |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 668 | if (!call_close) { |
Trond Myklebust | b39e625 | 2007-06-11 23:05:07 -0400 | [diff] [blame] | 669 | nfs4_put_open_state(state); |
| 670 | nfs4_put_state_owner(owner); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 671 | } else { |
| 672 | bool roc = pnfs_roc(state->inode); |
| 673 | |
| 674 | nfs4_do_close(path, state, gfp_mask, wait, roc); |
| 675 | } |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 676 | } |
| 677 | |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 678 | 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] | 679 | { |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 680 | __nfs4_close(path, state, fmode, GFP_NOFS, 0); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 681 | } |
| 682 | |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 683 | 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] | 684 | { |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 685 | __nfs4_close(path, state, fmode, GFP_KERNEL, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | /* |
| 689 | * Search the state->lock_states for an existing lock_owner |
| 690 | * that is compatible with current->files |
| 691 | */ |
| 692 | static struct nfs4_lock_state * |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 693 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | { |
| 695 | struct nfs4_lock_state *pos; |
| 696 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 697 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | continue; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 699 | switch (pos->ls_owner.lo_type) { |
| 700 | case NFS4_POSIX_LOCK_TYPE: |
| 701 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) |
| 702 | continue; |
| 703 | break; |
| 704 | case NFS4_FLOCK_LOCK_TYPE: |
| 705 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) |
| 706 | continue; |
| 707 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | atomic_inc(&pos->ls_count); |
| 709 | return pos; |
| 710 | } |
| 711 | return NULL; |
| 712 | } |
| 713 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | /* |
| 715 | * Return a compatible lock_state. If no initialized lock_state structure |
| 716 | * exists, return an uninitialized one. |
| 717 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 719 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | { |
| 721 | struct nfs4_lock_state *lsp; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 722 | struct nfs_server *server = state->owner->so_server; |
| 723 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 725 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | if (lsp == NULL) |
| 727 | return NULL; |
Trond Myklebust | d0dc370 | 2008-01-10 16:07:54 -0500 | [diff] [blame] | 728 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
| 729 | spin_lock_init(&lsp->ls_sequence.lock); |
| 730 | INIT_LIST_HEAD(&lsp->ls_sequence.list); |
| 731 | lsp->ls_seqid.sequence = &lsp->ls_sequence; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | atomic_set(&lsp->ls_count, 1); |
Trond Myklebust | b64aec8 | 2009-07-21 16:47:46 -0400 | [diff] [blame] | 733 | lsp->ls_state = state; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 734 | lsp->ls_owner.lo_type = type; |
| 735 | switch (lsp->ls_owner.lo_type) { |
| 736 | case NFS4_FLOCK_LOCK_TYPE: |
| 737 | lsp->ls_owner.lo_u.flock_owner = fl_pid; |
| 738 | break; |
| 739 | case NFS4_POSIX_LOCK_TYPE: |
| 740 | lsp->ls_owner.lo_u.posix_owner = fl_owner; |
| 741 | break; |
| 742 | default: |
| 743 | kfree(lsp); |
| 744 | return NULL; |
| 745 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 747 | nfs_alloc_unique_id_locked(&server->lockowner_id, &lsp->ls_id, 1, 64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 749 | INIT_LIST_HEAD(&lsp->ls_locks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | return lsp; |
| 751 | } |
| 752 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 753 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
| 754 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 755 | struct nfs_server *server = lsp->ls_state->owner->so_server; |
| 756 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 757 | |
| 758 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 759 | nfs_free_unique_id(&server->lockowner_id, &lsp->ls_id); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 760 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 761 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 762 | kfree(lsp); |
| 763 | } |
| 764 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | /* |
| 766 | * Return a compatible lock_state. If no initialized lock_state structure |
| 767 | * exists, return an uninitialized one. |
| 768 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 770 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 772 | struct nfs4_lock_state *lsp, *new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 774 | for(;;) { |
| 775 | spin_lock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 776 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 777 | if (lsp != NULL) |
| 778 | break; |
| 779 | if (new != NULL) { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 780 | list_add(&new->ls_locks, &state->lock_states); |
| 781 | set_bit(LK_STATE_IN_USE, &state->flags); |
| 782 | lsp = new; |
| 783 | new = NULL; |
| 784 | break; |
| 785 | } |
| 786 | spin_unlock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 787 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 788 | if (new == NULL) |
| 789 | return NULL; |
| 790 | } |
| 791 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 792 | if (new != NULL) |
| 793 | nfs4_free_lock_state(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | return lsp; |
| 795 | } |
| 796 | |
| 797 | /* |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 798 | * Release reference to lock_state, and free it if we see that |
| 799 | * it is no longer in use |
| 800 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 801 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 802 | { |
| 803 | struct nfs4_state *state; |
| 804 | |
| 805 | if (lsp == NULL) |
| 806 | return; |
| 807 | state = lsp->ls_state; |
| 808 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
| 809 | return; |
| 810 | list_del(&lsp->ls_locks); |
| 811 | if (list_empty(&state->lock_states)) |
| 812 | clear_bit(LK_STATE_IN_USE, &state->flags); |
| 813 | spin_unlock(&state->state_lock); |
Trond Myklebust | d3c7b7c | 2010-07-01 12:49:01 -0400 | [diff] [blame] | 814 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) |
| 815 | nfs4_release_lockowner(lsp); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 816 | nfs4_free_lock_state(lsp); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 817 | } |
| 818 | |
| 819 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
| 820 | { |
| 821 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
| 822 | |
| 823 | dst->fl_u.nfs4_fl.owner = lsp; |
| 824 | atomic_inc(&lsp->ls_count); |
| 825 | } |
| 826 | |
| 827 | static void nfs4_fl_release_lock(struct file_lock *fl) |
| 828 | { |
| 829 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
| 830 | } |
| 831 | |
Alexey Dobriyan | 6aed628 | 2009-09-21 17:01:11 -0700 | [diff] [blame] | 832 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 833 | .fl_copy_lock = nfs4_fl_copy_lock, |
| 834 | .fl_release_private = nfs4_fl_release_lock, |
| 835 | }; |
| 836 | |
| 837 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
| 838 | { |
| 839 | struct nfs4_lock_state *lsp; |
| 840 | |
| 841 | if (fl->fl_ops != NULL) |
| 842 | return 0; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 843 | if (fl->fl_flags & FL_POSIX) |
| 844 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); |
| 845 | else if (fl->fl_flags & FL_FLOCK) |
| 846 | lsp = nfs4_get_lock_state(state, 0, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE); |
| 847 | else |
| 848 | return -EINVAL; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 849 | if (lsp == NULL) |
| 850 | return -ENOMEM; |
| 851 | fl->fl_u.nfs4_fl.owner = lsp; |
| 852 | fl->fl_ops = &nfs4_fl_lock_ops; |
| 853 | return 0; |
| 854 | } |
| 855 | |
| 856 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | * Byte-range lock aware utility to initialize the stateid of read/write |
| 858 | * requests. |
| 859 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 860 | void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 862 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 863 | int seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 865 | do { |
| 866 | seq = read_seqbegin(&state->seqlock); |
| 867 | memcpy(dst, &state->stateid, sizeof(*dst)); |
| 868 | } while (read_seqretry(&state->seqlock, seq)); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 869 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
| 870 | return; |
| 871 | |
| 872 | spin_lock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 873 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 874 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
| 875 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); |
| 876 | spin_unlock(&state->state_lock); |
| 877 | nfs4_put_lock_state(lsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | } |
| 879 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 880 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 882 | struct nfs_seqid *new; |
| 883 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 884 | new = kmalloc(sizeof(*new), gfp_mask); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 885 | if (new != NULL) { |
| 886 | new->sequence = counter; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 887 | INIT_LIST_HEAD(&new->list); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 888 | } |
| 889 | return new; |
| 890 | } |
| 891 | |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 892 | void nfs_release_seqid(struct nfs_seqid *seqid) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 893 | { |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 894 | if (!list_empty(&seqid->list)) { |
| 895 | struct rpc_sequence *sequence = seqid->sequence->sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 896 | |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 897 | spin_lock(&sequence->lock); |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 898 | list_del_init(&seqid->list); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 899 | spin_unlock(&sequence->lock); |
| 900 | rpc_wake_up(&sequence->wait); |
| 901 | } |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 902 | } |
| 903 | |
| 904 | void nfs_free_seqid(struct nfs_seqid *seqid) |
| 905 | { |
| 906 | nfs_release_seqid(seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 907 | kfree(seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | } |
| 909 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 911 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
| 912 | * failed with a seqid incrementing error - |
| 913 | * see comments nfs_fs.h:seqid_mutating_error() |
| 914 | */ |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 915 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | { |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 917 | 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] | 918 | switch (status) { |
| 919 | case 0: |
| 920 | break; |
| 921 | case -NFS4ERR_BAD_SEQID: |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 922 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
| 923 | return; |
| 924 | printk(KERN_WARNING "NFS: v4 server returned a bad" |
Dan Muntz | 497799e | 2008-02-13 13:09:35 -0800 | [diff] [blame] | 925 | " sequence-id error on an" |
| 926 | " unconfirmed sequence %p!\n", |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 927 | seqid->sequence); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 928 | case -NFS4ERR_STALE_CLIENTID: |
| 929 | case -NFS4ERR_STALE_STATEID: |
| 930 | case -NFS4ERR_BAD_STATEID: |
| 931 | case -NFS4ERR_BADXDR: |
| 932 | case -NFS4ERR_RESOURCE: |
| 933 | case -NFS4ERR_NOFILEHANDLE: |
| 934 | /* Non-seqid mutating errors */ |
| 935 | return; |
| 936 | }; |
| 937 | /* |
| 938 | * Note: no locking needed as we are guaranteed to be first |
| 939 | * on the sequence list |
| 940 | */ |
| 941 | seqid->sequence->counter++; |
| 942 | } |
| 943 | |
| 944 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) |
| 945 | { |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 946 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
| 947 | struct nfs4_state_owner, so_seqid); |
| 948 | struct nfs_server *server = sp->so_server; |
| 949 | |
| 950 | if (status == -NFS4ERR_BAD_SEQID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | nfs4_drop_state_owner(sp); |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 952 | if (!nfs4_has_session(server->nfs_client)) |
| 953 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 954 | } |
| 955 | |
| 956 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 957 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
| 958 | * failed with a seqid incrementing error - |
| 959 | * see comments nfs_fs.h:seqid_mutating_error() |
| 960 | */ |
| 961 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) |
| 962 | { |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 963 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) |
| 967 | { |
| 968 | struct rpc_sequence *sequence = seqid->sequence->sequence; |
| 969 | int status = 0; |
| 970 | |
| 971 | spin_lock(&sequence->lock); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 972 | if (list_empty(&seqid->list)) |
| 973 | list_add_tail(&seqid->list, &sequence->list); |
| 974 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) |
| 975 | goto unlock; |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 976 | rpc_sleep_on(&sequence->wait, task, NULL); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 977 | status = -EAGAIN; |
| 978 | unlock: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 979 | spin_unlock(&sequence->lock); |
| 980 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | } |
| 982 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 983 | static int nfs4_run_state_manager(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 985 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 986 | { |
| 987 | smp_mb__before_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 988 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 989 | smp_mb__after_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 990 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 991 | rpc_wake_up(&clp->cl_rpcwaitq); |
| 992 | } |
| 993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | /* |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 995 | * Schedule the nfs_client asynchronous state management routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | */ |
Trond Myklebust | b0d3ded | 2008-12-23 15:21:50 -0500 | [diff] [blame] | 997 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | { |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 999 | struct task_struct *task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1001 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1002 | return; |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1003 | __module_get(THIS_MODULE); |
| 1004 | atomic_inc(&clp->cl_count); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1005 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 1006 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 1007 | RPC_DISPLAY_ADDR)); |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1008 | if (!IS_ERR(task)) |
| 1009 | return; |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1010 | nfs4_clear_state_manager_bit(clp); |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 1011 | nfs_put_client(clp); |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1012 | module_put(THIS_MODULE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | } |
| 1014 | |
| 1015 | /* |
| 1016 | * Schedule a state recovery attempt |
| 1017 | */ |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 1018 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | { |
| 1020 | if (!clp) |
| 1021 | return; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1022 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1023 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1024 | nfs4_schedule_state_manager(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | } |
| 1026 | |
Trond Myklebust | a2c0b9e | 2010-01-26 15:42:47 -0500 | [diff] [blame] | 1027 | int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1028 | { |
| 1029 | |
| 1030 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1031 | /* Don't recover state that expired before the reboot */ |
| 1032 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { |
| 1033 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1034 | return 0; |
| 1035 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1036 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1037 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 1038 | return 1; |
| 1039 | } |
| 1040 | |
Trond Myklebust | 9e33bed | 2008-12-23 15:21:46 -0500 | [diff] [blame] | 1041 | 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] | 1042 | { |
| 1043 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 1044 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1045 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1046 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
| 1047 | return 1; |
| 1048 | } |
| 1049 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1050 | 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] | 1051 | { |
| 1052 | struct inode *inode = state->inode; |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1053 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | struct file_lock *fl; |
| 1055 | int status = 0; |
| 1056 | |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1057 | if (inode->i_flock == NULL) |
| 1058 | return 0; |
| 1059 | |
| 1060 | /* Guard against delegation returns and new lock/unlock calls */ |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1061 | down_write(&nfsi->rwsem); |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1062 | /* Protect inode->i_flock using the BKL */ |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1063 | lock_flocks(); |
Harvey Harrison | 90dc7d2 | 2008-02-20 13:03:05 -0800 | [diff] [blame] | 1064 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 1065 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | continue; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 1067 | if (nfs_file_open_context(fl->fl_file)->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | continue; |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1069 | unlock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | status = ops->recover_lock(state, fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | switch (status) { |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1072 | case 0: |
| 1073 | break; |
| 1074 | case -ESTALE: |
| 1075 | case -NFS4ERR_ADMIN_REVOKED: |
| 1076 | case -NFS4ERR_STALE_STATEID: |
| 1077 | case -NFS4ERR_BAD_STATEID: |
| 1078 | case -NFS4ERR_EXPIRED: |
| 1079 | case -NFS4ERR_NO_GRACE: |
| 1080 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1081 | case -NFS4ERR_BADSESSION: |
| 1082 | case -NFS4ERR_BADSLOT: |
| 1083 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1084 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1085 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | default: |
| 1087 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1088 | __func__, status); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1089 | case -ENOMEM: |
| 1090 | case -NFS4ERR_DENIED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | case -NFS4ERR_RECLAIM_BAD: |
| 1092 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 1093 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1094 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | } |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1096 | lock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | } |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1098 | unlock_flocks(); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1099 | out: |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1100 | up_write(&nfsi->rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | return status; |
| 1102 | } |
| 1103 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1104 | 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] | 1105 | { |
| 1106 | struct nfs4_state *state; |
| 1107 | struct nfs4_lock_state *lock; |
| 1108 | int status = 0; |
| 1109 | |
| 1110 | /* Note: we rely on the sp->so_states list being ordered |
| 1111 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) |
| 1112 | * states first. |
| 1113 | * This is needed to ensure that the server won't give us any |
| 1114 | * read delegations that we have to return if, say, we are |
| 1115 | * recovering after a network partition or a reboot from a |
| 1116 | * server that doesn't support a grace period. |
| 1117 | */ |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1118 | restart: |
| 1119 | spin_lock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1121 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
| 1122 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | if (state->state == 0) |
| 1124 | continue; |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1125 | atomic_inc(&state->count); |
| 1126 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | status = ops->recover_open(sp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | if (status >= 0) { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1129 | status = nfs4_reclaim_locks(state, ops); |
| 1130 | if (status >= 0) { |
| 1131 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
| 1132 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) |
| 1133 | printk("%s: Lock reclaim failed!\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1134 | __func__); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1135 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1136 | nfs4_put_open_state(state); |
| 1137 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | } |
| 1140 | switch (status) { |
| 1141 | default: |
| 1142 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1143 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | case -ENOENT: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1145 | case -ENOMEM: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1146 | case -ESTALE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | /* |
| 1148 | * Open state on this file cannot be recovered |
| 1149 | * All we can do is revert to using the zero stateid. |
| 1150 | */ |
| 1151 | memset(state->stateid.data, 0, |
| 1152 | sizeof(state->stateid.data)); |
| 1153 | /* Mark the file as being 'closed' */ |
| 1154 | state->state = 0; |
| 1155 | break; |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1156 | case -EKEYEXPIRED: |
| 1157 | /* |
| 1158 | * User RPCSEC_GSS context has expired. |
| 1159 | * We cannot recover this stateid now, so |
| 1160 | * skip it and allow recovery thread to |
| 1161 | * proceed. |
| 1162 | */ |
| 1163 | break; |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1164 | case -NFS4ERR_ADMIN_REVOKED: |
| 1165 | case -NFS4ERR_STALE_STATEID: |
| 1166 | case -NFS4ERR_BAD_STATEID: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1167 | case -NFS4ERR_RECLAIM_BAD: |
| 1168 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1169 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1170 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | case -NFS4ERR_EXPIRED: |
| 1172 | case -NFS4ERR_NO_GRACE: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1173 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1175 | case -NFS4ERR_BADSESSION: |
| 1176 | case -NFS4ERR_BADSLOT: |
| 1177 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1178 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | goto out_err; |
| 1180 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1181 | nfs4_put_open_state(state); |
| 1182 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1184 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | return 0; |
| 1186 | out_err: |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1187 | nfs4_put_open_state(state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | return status; |
| 1189 | } |
| 1190 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1191 | static void nfs4_clear_open_state(struct nfs4_state *state) |
| 1192 | { |
| 1193 | struct nfs4_lock_state *lock; |
| 1194 | |
| 1195 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1196 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1197 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1198 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1199 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1200 | lock->ls_seqid.flags = 0; |
| 1201 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; |
| 1202 | } |
| 1203 | } |
| 1204 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1205 | static void nfs4_reset_seqids(struct nfs_server *server, |
| 1206 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1207 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1208 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1209 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1210 | struct rb_node *pos; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1211 | struct nfs4_state *state; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1212 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1213 | spin_lock(&clp->cl_lock); |
| 1214 | for (pos = rb_first(&server->state_owners); |
| 1215 | pos != NULL; |
| 1216 | pos = rb_next(pos)) { |
| 1217 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1218 | sp->so_seqid.flags = 0; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1219 | spin_lock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1220 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1221 | if (mark_reclaim(clp, state)) |
| 1222 | nfs4_clear_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1223 | } |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1224 | spin_unlock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1225 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1226 | spin_unlock(&clp->cl_lock); |
| 1227 | } |
| 1228 | |
| 1229 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, |
| 1230 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
| 1231 | { |
| 1232 | struct nfs_server *server; |
| 1233 | |
| 1234 | rcu_read_lock(); |
| 1235 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1236 | nfs4_reset_seqids(server, mark_reclaim); |
| 1237 | rcu_read_unlock(); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1238 | } |
| 1239 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1240 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
| 1241 | { |
| 1242 | /* Mark all delegations for reclaim */ |
| 1243 | nfs_delegation_mark_reclaim(clp); |
| 1244 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); |
| 1245 | } |
| 1246 | |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1247 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
| 1248 | const struct nfs4_state_recovery_ops *ops) |
| 1249 | { |
| 1250 | /* Notify the server we're done reclaiming our state */ |
| 1251 | if (ops->reclaim_complete) |
| 1252 | (void)ops->reclaim_complete(clp); |
| 1253 | } |
| 1254 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1255 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1256 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1257 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1258 | struct nfs4_state_owner *sp; |
| 1259 | struct rb_node *pos; |
| 1260 | struct nfs4_state *state; |
| 1261 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1262 | spin_lock(&clp->cl_lock); |
| 1263 | for (pos = rb_first(&server->state_owners); |
| 1264 | pos != NULL; |
| 1265 | pos = rb_next(pos)) { |
| 1266 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1267 | spin_lock(&sp->so_lock); |
| 1268 | list_for_each_entry(state, &sp->so_states, open_states) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1269 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
| 1270 | &state->flags)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1271 | continue; |
| 1272 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1273 | } |
| 1274 | spin_unlock(&sp->so_lock); |
| 1275 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1276 | spin_unlock(&clp->cl_lock); |
| 1277 | } |
| 1278 | |
| 1279 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
| 1280 | { |
| 1281 | struct nfs_server *server; |
| 1282 | |
| 1283 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1284 | return 0; |
| 1285 | |
| 1286 | rcu_read_lock(); |
| 1287 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1288 | nfs4_clear_reclaim_server(server); |
| 1289 | rcu_read_unlock(); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1290 | |
| 1291 | nfs_delegation_reap_unclaimed(clp); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1292 | return 1; |
| 1293 | } |
| 1294 | |
| 1295 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
| 1296 | { |
| 1297 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
| 1298 | return; |
| 1299 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1300 | } |
| 1301 | |
| 1302 | static void nfs_delegation_clear_all(struct nfs_client *clp) |
| 1303 | { |
| 1304 | nfs_delegation_mark_reclaim(clp); |
| 1305 | nfs_delegation_reap_unclaimed(clp); |
| 1306 | } |
| 1307 | |
| 1308 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
| 1309 | { |
| 1310 | nfs_delegation_clear_all(clp); |
| 1311 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 1312 | } |
| 1313 | |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1314 | static void nfs4_warn_keyexpired(const char *s) |
| 1315 | { |
| 1316 | printk_ratelimited(KERN_WARNING "Error: state manager" |
| 1317 | " encountered RPCSEC_GSS session" |
| 1318 | " expired against NFSv4 server %s.\n", |
| 1319 | s); |
| 1320 | } |
| 1321 | |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1322 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1323 | { |
| 1324 | switch (error) { |
| 1325 | case -NFS4ERR_CB_PATH_DOWN: |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1326 | nfs_handle_cb_pathdown(clp); |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1327 | return 0; |
Trond Myklebust | c8b7ae3d | 2009-12-03 15:53:21 -0500 | [diff] [blame] | 1328 | case -NFS4ERR_NO_GRACE: |
| 1329 | nfs4_state_end_reclaim_reboot(clp); |
| 1330 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1331 | case -NFS4ERR_STALE_CLIENTID: |
| 1332 | case -NFS4ERR_LEASE_MOVED: |
| 1333 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1334 | nfs4_state_clear_reclaim_reboot(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1335 | nfs4_state_start_reclaim_reboot(clp); |
| 1336 | break; |
| 1337 | case -NFS4ERR_EXPIRED: |
| 1338 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1339 | nfs4_state_start_reclaim_nograce(clp); |
Andy Adamson | 8ba9bf8 | 2009-12-04 15:55:34 -0500 | [diff] [blame] | 1340 | break; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1341 | case -NFS4ERR_BADSESSION: |
| 1342 | case -NFS4ERR_BADSLOT: |
| 1343 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1344 | case -NFS4ERR_DEADSESSION: |
| 1345 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1346 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 1347 | case -NFS4ERR_SEQ_MISORDERED: |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1348 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 0b9e2d4 | 2009-12-04 16:02:14 -0500 | [diff] [blame] | 1349 | /* Zero session reset errors */ |
| 1350 | return 0; |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1351 | case -EKEYEXPIRED: |
| 1352 | /* Nothing we can do */ |
| 1353 | nfs4_warn_keyexpired(clp->cl_hostname); |
| 1354 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1355 | } |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1356 | return error; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1357 | } |
| 1358 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1359 | 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] | 1360 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1361 | struct nfs4_state_owner *sp; |
| 1362 | struct nfs_server *server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1363 | struct rb_node *pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | int status = 0; |
| 1365 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1366 | restart: |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1367 | rcu_read_lock(); |
| 1368 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 1369 | spin_lock(&clp->cl_lock); |
| 1370 | for (pos = rb_first(&server->state_owners); |
| 1371 | pos != NULL; |
| 1372 | pos = rb_next(pos)) { |
| 1373 | sp = rb_entry(pos, |
| 1374 | struct nfs4_state_owner, so_server_node); |
| 1375 | if (!test_and_clear_bit(ops->owner_flag_bit, |
| 1376 | &sp->so_flags)) |
| 1377 | continue; |
| 1378 | atomic_inc(&sp->so_count); |
| 1379 | spin_unlock(&clp->cl_lock); |
| 1380 | rcu_read_unlock(); |
| 1381 | |
| 1382 | status = nfs4_reclaim_open_state(sp, ops); |
| 1383 | if (status < 0) { |
| 1384 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
| 1385 | nfs4_put_state_owner(sp); |
| 1386 | return nfs4_recovery_handle_error(clp, status); |
| 1387 | } |
| 1388 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1389 | nfs4_put_state_owner(sp); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1390 | goto restart; |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1391 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1392 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1393 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1394 | rcu_read_unlock(); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1395 | return status; |
| 1396 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1398 | static int nfs4_check_lease(struct nfs_client *clp) |
| 1399 | { |
| 1400 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1401 | const struct nfs4_state_maintenance_ops *ops = |
| 1402 | clp->cl_mvops->state_renewal_ops; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1403 | int status = -NFS4ERR_EXPIRED; |
| 1404 | |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1405 | /* Is the client already known to have an expired lease? */ |
| 1406 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1407 | return 0; |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 1408 | spin_lock(&clp->cl_lock); |
| 1409 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1410 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1411 | if (cred == NULL) { |
| 1412 | cred = nfs4_get_setclientid_cred(clp); |
| 1413 | if (cred == NULL) |
| 1414 | goto out; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1415 | } |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1416 | status = ops->renew_lease(clp, cred); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1417 | put_rpccred(cred); |
| 1418 | out: |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1419 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1420 | } |
| 1421 | |
| 1422 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
| 1423 | { |
| 1424 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1425 | const struct nfs4_state_recovery_ops *ops = |
| 1426 | clp->cl_mvops->reboot_recovery_ops; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1427 | int status = -ENOENT; |
| 1428 | |
Andy Adamson | 90a1661 | 2009-04-01 09:22:48 -0400 | [diff] [blame] | 1429 | cred = ops->get_clid_cred(clp); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1430 | if (cred != NULL) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1431 | status = ops->establish_clid(clp, cred); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1432 | put_rpccred(cred); |
| 1433 | /* Handle case where the user hasn't set up machine creds */ |
| 1434 | if (status == -EACCES && cred == clp->cl_machine_cred) { |
| 1435 | nfs4_clear_machine_cred(clp); |
| 1436 | status = -EAGAIN; |
| 1437 | } |
Benny Halevy | c2e713d | 2009-04-01 09:21:51 -0400 | [diff] [blame] | 1438 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
| 1439 | status = -EPROTONOSUPPORT; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1440 | } |
| 1441 | return status; |
| 1442 | } |
| 1443 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1444 | #ifdef CONFIG_NFS_V4_1 |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1445 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
| 1446 | { |
| 1447 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); |
| 1448 | nfs4_schedule_state_recovery(clp); |
| 1449 | } |
| 1450 | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1451 | static void nfs4_reset_all_state(struct nfs_client *clp) |
| 1452 | { |
| 1453 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 1454 | clp->cl_boot_time = CURRENT_TIME; |
| 1455 | nfs4_state_start_reclaim_nograce(clp); |
| 1456 | nfs4_schedule_state_recovery(clp); |
| 1457 | } |
| 1458 | } |
| 1459 | |
| 1460 | static void nfs41_handle_server_reboot(struct nfs_client *clp) |
| 1461 | { |
| 1462 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 1463 | nfs4_state_start_reclaim_reboot(clp); |
| 1464 | nfs4_schedule_state_recovery(clp); |
| 1465 | } |
| 1466 | } |
| 1467 | |
| 1468 | static void nfs41_handle_state_revoked(struct nfs_client *clp) |
| 1469 | { |
| 1470 | /* Temporary */ |
| 1471 | nfs4_reset_all_state(clp); |
| 1472 | } |
| 1473 | |
| 1474 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
| 1475 | { |
| 1476 | /* This will need to handle layouts too */ |
| 1477 | nfs_expire_all_delegations(clp); |
| 1478 | } |
| 1479 | |
| 1480 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
| 1481 | { |
| 1482 | nfs_expire_all_delegations(clp); |
| 1483 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) |
| 1484 | nfs4_schedule_state_recovery(clp); |
| 1485 | } |
| 1486 | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1487 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
| 1488 | { |
| 1489 | if (!flags) |
| 1490 | return; |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1491 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
| 1492 | nfs41_handle_server_reboot(clp); |
| 1493 | else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1494 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
| 1495 | SEQ4_STATUS_ADMIN_STATE_REVOKED | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1496 | SEQ4_STATUS_LEASE_MOVED)) |
| 1497 | nfs41_handle_state_revoked(clp); |
| 1498 | else if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
| 1499 | nfs41_handle_recallable_state_revoked(clp); |
| 1500 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1501 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
| 1502 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1503 | nfs41_handle_cb_path_down(clp); |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1504 | } |
| 1505 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1506 | static int nfs4_reset_session(struct nfs_client *clp) |
| 1507 | { |
| 1508 | int status; |
| 1509 | |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 1510 | nfs4_begin_drain_session(clp); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1511 | status = nfs4_proc_destroy_session(clp->cl_session); |
| 1512 | if (status && status != -NFS4ERR_BADSESSION && |
| 1513 | status != -NFS4ERR_DEADSESSION) { |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 1514 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1515 | goto out; |
| 1516 | } |
| 1517 | |
| 1518 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
Trond Myklebust | f26468f | 2009-12-05 19:32:11 -0500 | [diff] [blame] | 1519 | status = nfs4_proc_create_session(clp); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1520 | if (status) { |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 1521 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1522 | goto out; |
| 1523 | } |
| 1524 | /* create_session negotiated new slot table */ |
| 1525 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 1526 | |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1527 | /* Let the state manager reestablish state */ |
| 1528 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1529 | nfs41_setup_state_renewal(clp); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1530 | out: |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1531 | return status; |
| 1532 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1533 | |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1534 | static int nfs4_recall_slot(struct nfs_client *clp) |
| 1535 | { |
| 1536 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; |
| 1537 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; |
| 1538 | struct nfs4_slot *new, *old; |
| 1539 | int i; |
| 1540 | |
| 1541 | nfs4_begin_drain_session(clp); |
| 1542 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1543 | GFP_NOFS); |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1544 | if (!new) |
| 1545 | return -ENOMEM; |
| 1546 | |
| 1547 | spin_lock(&fc_tbl->slot_tbl_lock); |
| 1548 | for (i = 0; i < fc_tbl->target_max_slots; i++) |
| 1549 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; |
| 1550 | old = fc_tbl->slots; |
| 1551 | fc_tbl->slots = new; |
| 1552 | fc_tbl->max_slots = fc_tbl->target_max_slots; |
| 1553 | fc_tbl->target_max_slots = 0; |
| 1554 | fc_attrs->max_reqs = fc_tbl->max_slots; |
| 1555 | spin_unlock(&fc_tbl->slot_tbl_lock); |
| 1556 | |
| 1557 | kfree(old); |
| 1558 | nfs4_end_drain_session(clp); |
| 1559 | return 0; |
| 1560 | } |
| 1561 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1562 | #else /* CONFIG_NFS_V4_1 */ |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1563 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1564 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1565 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1566 | #endif /* CONFIG_NFS_V4_1 */ |
| 1567 | |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1568 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
| 1569 | * on EXCHANGE_ID for v4.1 |
| 1570 | */ |
| 1571 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) |
| 1572 | { |
| 1573 | if (nfs4_has_session(clp)) { |
| 1574 | switch (status) { |
| 1575 | case -NFS4ERR_DELAY: |
| 1576 | case -NFS4ERR_CLID_INUSE: |
| 1577 | case -EAGAIN: |
| 1578 | break; |
| 1579 | |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1580 | case -EKEYEXPIRED: |
| 1581 | nfs4_warn_keyexpired(clp->cl_hostname); |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1582 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 1583 | * in nfs4_exchange_id */ |
| 1584 | default: |
| 1585 | return; |
| 1586 | } |
| 1587 | } |
| 1588 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1589 | } |
| 1590 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1591 | static void nfs4_state_manager(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1592 | { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1593 | int status = 0; |
| 1594 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1595 | /* Ensure exclusive access to NFSv4 state */ |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1596 | for(;;) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1597 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
| 1598 | /* We're going to have to re-establish a clientid */ |
| 1599 | status = nfs4_reclaim_lease(clp); |
| 1600 | if (status) { |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1601 | nfs4_set_lease_expired(clp, status); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1602 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
| 1603 | &clp->cl_state)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1604 | continue; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1605 | if (clp->cl_cons_state == |
| 1606 | NFS_CS_SESSION_INITING) |
| 1607 | nfs_mark_client_ready(clp, status); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1608 | goto out_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | } |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1610 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Ricardo Labiaga | 7cab89b | 2009-12-08 14:35:28 -0500 | [diff] [blame] | 1611 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1612 | pnfs_destroy_all_layouts(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1613 | } |
| 1614 | |
| 1615 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
| 1616 | status = nfs4_check_lease(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1617 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1618 | continue; |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1619 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
| 1620 | goto out_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1622 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1623 | /* Initialize or reset the session */ |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1624 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
Trond Myklebust | 7111dc7 | 2009-08-24 19:21:29 -0400 | [diff] [blame] | 1625 | && nfs4_has_session(clp)) { |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 1626 | status = nfs4_reset_session(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1627 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1628 | continue; |
| 1629 | if (status < 0) |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1630 | goto out_error; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1631 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1632 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1633 | /* First recover reboot state... */ |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 1634 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1635 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1636 | clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1637 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1638 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1639 | continue; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1640 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1641 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 1642 | continue; |
| 1643 | if (status < 0) |
| 1644 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1645 | } |
| 1646 | |
| 1647 | /* Now recover expired state... */ |
| 1648 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1649 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1650 | clp->cl_mvops->nograce_recovery_ops); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1651 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1652 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1653 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1654 | continue; |
| 1655 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1656 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1657 | } |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1658 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1659 | nfs4_end_drain_session(clp); |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1660 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
| 1661 | nfs_client_return_marked_delegations(clp); |
| 1662 | continue; |
| 1663 | } |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1664 | /* Recall session slots */ |
| 1665 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) |
| 1666 | && nfs4_has_session(clp)) { |
| 1667 | status = nfs4_recall_slot(clp); |
| 1668 | if (status < 0) |
| 1669 | goto out_error; |
| 1670 | continue; |
| 1671 | } |
| 1672 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1673 | |
| 1674 | nfs4_clear_state_manager_bit(clp); |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1675 | /* Did we race with an attempt to give us more work? */ |
| 1676 | if (clp->cl_state == 0) |
| 1677 | break; |
| 1678 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1679 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | } |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1681 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | out_error: |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1683 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 1684 | " with error %d\n", clp->cl_hostname, -status); |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1685 | nfs4_end_drain_session(clp); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1686 | nfs4_clear_state_manager_bit(clp); |
| 1687 | } |
| 1688 | |
| 1689 | static int nfs4_run_state_manager(void *ptr) |
| 1690 | { |
| 1691 | struct nfs_client *clp = ptr; |
| 1692 | |
| 1693 | allow_signal(SIGKILL); |
| 1694 | nfs4_state_manager(clp); |
| 1695 | nfs_put_client(clp); |
| 1696 | module_put_and_exit(0); |
| 1697 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | } |
| 1699 | |
| 1700 | /* |
| 1701 | * Local variables: |
| 1702 | * c-basic-offset: 8 |
| 1703 | * End: |
| 1704 | */ |