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 | |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 108 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 109 | { |
| 110 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 111 | struct rb_node *pos; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 112 | struct rpc_cred *cred = NULL; |
| 113 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 114 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 115 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 116 | if (list_empty(&sp->so_states)) |
| 117 | continue; |
| 118 | cred = get_rpccred(sp->so_cred); |
| 119 | break; |
| 120 | } |
| 121 | return cred; |
| 122 | } |
| 123 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 124 | #if defined(CONFIG_NFS_V4_1) |
| 125 | |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 126 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
| 127 | { |
| 128 | int status; |
| 129 | struct nfs_fsinfo fsinfo; |
| 130 | |
| 131 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
| 132 | if (status == 0) { |
| 133 | /* Update lease time and schedule renewal */ |
| 134 | spin_lock(&clp->cl_lock); |
| 135 | clp->cl_lease_time = fsinfo.lease_time * HZ; |
| 136 | clp->cl_last_renewal = jiffies; |
| 137 | spin_unlock(&clp->cl_lock); |
| 138 | |
| 139 | nfs4_schedule_state_renewal(clp); |
| 140 | } |
| 141 | |
| 142 | return status; |
| 143 | } |
| 144 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame^] | 145 | /* |
| 146 | * Back channel returns NFS4ERR_DELAY for new requests when |
| 147 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining |
| 148 | * is ended. |
| 149 | */ |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 150 | static void nfs4_end_drain_session(struct nfs_client *clp) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 151 | { |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 152 | struct nfs4_session *ses = clp->cl_session; |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 153 | int max_slots; |
| 154 | |
Trond Myklebust | a2118c3 | 2010-06-16 09:52:26 -0400 | [diff] [blame] | 155 | if (ses == NULL) |
| 156 | return; |
| 157 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 158 | spin_lock(&ses->fc_slot_table.slot_tbl_lock); |
| 159 | max_slots = ses->fc_slot_table.max_slots; |
| 160 | while (max_slots--) { |
| 161 | struct rpc_task *task; |
| 162 | |
| 163 | task = rpc_wake_up_next(&ses->fc_slot_table. |
| 164 | slot_tbl_waitq); |
| 165 | if (!task) |
| 166 | break; |
| 167 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 168 | } |
| 169 | spin_unlock(&ses->fc_slot_table.slot_tbl_lock); |
| 170 | } |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 171 | } |
| 172 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame^] | 173 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 174 | { |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 175 | spin_lock(&tbl->slot_tbl_lock); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 176 | if (tbl->highest_used_slotid != -1) { |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame^] | 177 | INIT_COMPLETION(tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 178 | spin_unlock(&tbl->slot_tbl_lock); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame^] | 179 | return wait_for_completion_interruptible(&tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 180 | } |
| 181 | spin_unlock(&tbl->slot_tbl_lock); |
| 182 | return 0; |
| 183 | } |
| 184 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame^] | 185 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
| 186 | { |
| 187 | struct nfs4_session *ses = clp->cl_session; |
| 188 | int ret = 0; |
| 189 | |
| 190 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); |
| 191 | /* back channel */ |
| 192 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); |
| 193 | if (ret) |
| 194 | return ret; |
| 195 | /* fore channel */ |
| 196 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); |
| 197 | } |
| 198 | |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 199 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
| 200 | { |
| 201 | int status; |
| 202 | |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 203 | nfs4_begin_drain_session(clp); |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 204 | status = nfs4_proc_exchange_id(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 205 | if (status != 0) |
| 206 | goto out; |
| 207 | status = nfs4_proc_create_session(clp); |
| 208 | if (status != 0) |
| 209 | goto out; |
Andy Adamson | 2c2618c | 2011-01-06 02:04:31 +0000 | [diff] [blame] | 210 | status = nfs4_set_callback_sessionid(clp); |
| 211 | if (status != 0) { |
| 212 | printk(KERN_WARNING "Sessionid not set. No callback service\n"); |
| 213 | nfs_callback_down(1); |
| 214 | status = 0; |
| 215 | } |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 216 | nfs41_setup_state_renewal(clp); |
| 217 | nfs_mark_client_ready(clp, NFS_CS_READY); |
| 218 | out: |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 219 | return status; |
| 220 | } |
| 221 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 222 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
| 223 | { |
| 224 | struct rpc_cred *cred; |
| 225 | |
| 226 | spin_lock(&clp->cl_lock); |
| 227 | cred = nfs4_get_machine_cred_locked(clp); |
| 228 | spin_unlock(&clp->cl_lock); |
| 229 | return cred; |
| 230 | } |
| 231 | |
| 232 | #endif /* CONFIG_NFS_V4_1 */ |
| 233 | |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 234 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 235 | { |
| 236 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 237 | struct rb_node *pos; |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 238 | struct rpc_cred *cred; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 239 | |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 240 | spin_lock(&clp->cl_lock); |
| 241 | cred = nfs4_get_machine_cred_locked(clp); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 242 | if (cred != NULL) |
| 243 | goto out; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 244 | pos = rb_first(&clp->cl_state_owners); |
| 245 | if (pos != NULL) { |
| 246 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 247 | cred = get_rpccred(sp->so_cred); |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 248 | } |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 249 | out: |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 250 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 251 | return cred; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 252 | } |
| 253 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 254 | static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, |
| 255 | __u64 minval, int maxbits) |
| 256 | { |
| 257 | struct rb_node **p, *parent; |
| 258 | struct nfs_unique_id *pos; |
| 259 | __u64 mask = ~0ULL; |
| 260 | |
| 261 | if (maxbits < 64) |
| 262 | mask = (1ULL << maxbits) - 1ULL; |
| 263 | |
| 264 | /* Ensure distribution is more or less flat */ |
| 265 | get_random_bytes(&new->id, sizeof(new->id)); |
| 266 | new->id &= mask; |
| 267 | if (new->id < minval) |
| 268 | new->id += minval; |
| 269 | retry: |
| 270 | p = &root->rb_node; |
| 271 | parent = NULL; |
| 272 | |
| 273 | while (*p != NULL) { |
| 274 | parent = *p; |
| 275 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); |
| 276 | |
| 277 | if (new->id < pos->id) |
| 278 | p = &(*p)->rb_left; |
| 279 | else if (new->id > pos->id) |
| 280 | p = &(*p)->rb_right; |
| 281 | else |
| 282 | goto id_exists; |
| 283 | } |
| 284 | rb_link_node(&new->rb_node, parent, p); |
| 285 | rb_insert_color(&new->rb_node, root); |
| 286 | return; |
| 287 | id_exists: |
| 288 | for (;;) { |
| 289 | new->id++; |
| 290 | if (new->id < minval || (new->id & mask) != new->id) { |
| 291 | new->id = minval; |
| 292 | break; |
| 293 | } |
| 294 | parent = rb_next(parent); |
| 295 | if (parent == NULL) |
| 296 | break; |
| 297 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); |
| 298 | if (new->id < pos->id) |
| 299 | break; |
| 300 | } |
| 301 | goto retry; |
| 302 | } |
| 303 | |
| 304 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) |
| 305 | { |
| 306 | rb_erase(&id->rb_node, root); |
| 307 | } |
| 308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | static struct nfs4_state_owner * |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 310 | nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | { |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 312 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 313 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
| 314 | *parent = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | struct nfs4_state_owner *sp, *res = NULL; |
| 316 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 317 | while (*p != NULL) { |
| 318 | parent = *p; |
| 319 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); |
| 320 | |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 321 | if (server < sp->so_server) { |
| 322 | p = &parent->rb_left; |
| 323 | continue; |
| 324 | } |
| 325 | if (server > sp->so_server) { |
| 326 | p = &parent->rb_right; |
| 327 | continue; |
| 328 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 329 | if (cred < sp->so_cred) |
| 330 | p = &parent->rb_left; |
| 331 | else if (cred > sp->so_cred) |
| 332 | p = &parent->rb_right; |
| 333 | else { |
| 334 | atomic_inc(&sp->so_count); |
| 335 | res = sp; |
| 336 | break; |
| 337 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
| 339 | return res; |
| 340 | } |
| 341 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 342 | static struct nfs4_state_owner * |
| 343 | nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) |
| 344 | { |
| 345 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
| 346 | *parent = NULL; |
| 347 | struct nfs4_state_owner *sp; |
| 348 | |
| 349 | while (*p != NULL) { |
| 350 | parent = *p; |
| 351 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); |
| 352 | |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 353 | if (new->so_server < sp->so_server) { |
| 354 | p = &parent->rb_left; |
| 355 | continue; |
| 356 | } |
| 357 | if (new->so_server > sp->so_server) { |
| 358 | p = &parent->rb_right; |
| 359 | continue; |
| 360 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 361 | if (new->so_cred < sp->so_cred) |
| 362 | p = &parent->rb_left; |
| 363 | else if (new->so_cred > sp->so_cred) |
| 364 | p = &parent->rb_right; |
| 365 | else { |
| 366 | atomic_inc(&sp->so_count); |
| 367 | return sp; |
| 368 | } |
| 369 | } |
| 370 | nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); |
| 371 | rb_link_node(&new->so_client_node, parent, p); |
| 372 | rb_insert_color(&new->so_client_node, &clp->cl_state_owners); |
| 373 | return new; |
| 374 | } |
| 375 | |
| 376 | static void |
| 377 | nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) |
| 378 | { |
| 379 | if (!RB_EMPTY_NODE(&sp->so_client_node)) |
| 380 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); |
| 381 | nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); |
| 382 | } |
| 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | /* |
| 385 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to |
| 386 | * create a new state_owner. |
| 387 | * |
| 388 | */ |
| 389 | static struct nfs4_state_owner * |
| 390 | nfs4_alloc_state_owner(void) |
| 391 | { |
| 392 | struct nfs4_state_owner *sp; |
| 393 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 394 | sp = kzalloc(sizeof(*sp),GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | if (!sp) |
| 396 | return NULL; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 397 | spin_lock_init(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | INIT_LIST_HEAD(&sp->so_states); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 399 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
| 400 | sp->so_seqid.sequence = &sp->so_sequence; |
| 401 | spin_lock_init(&sp->so_sequence.lock); |
| 402 | INIT_LIST_HEAD(&sp->so_sequence.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | atomic_set(&sp->so_count, 1); |
| 404 | return sp; |
| 405 | } |
| 406 | |
Adrian Bunk | 1d2e88e | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 407 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
| 409 | { |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 410 | if (!RB_EMPTY_NODE(&sp->so_client_node)) { |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 411 | struct nfs_client *clp = sp->so_server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 412 | |
| 413 | spin_lock(&clp->cl_lock); |
| 414 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); |
| 415 | RB_CLEAR_NODE(&sp->so_client_node); |
| 416 | spin_unlock(&clp->cl_lock); |
| 417 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | } |
| 419 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
| 421 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 422 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | struct nfs4_state_owner *sp, *new; |
| 424 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | spin_lock(&clp->cl_lock); |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 426 | sp = nfs4_find_state_owner(server, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | if (sp != NULL) |
| 429 | return sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 430 | new = nfs4_alloc_state_owner(); |
| 431 | if (new == NULL) |
| 432 | return NULL; |
Trond Myklebust | 6f2e64d | 2007-07-06 10:53:21 -0400 | [diff] [blame] | 433 | new->so_server = server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 434 | new->so_cred = cred; |
| 435 | spin_lock(&clp->cl_lock); |
| 436 | sp = nfs4_insert_state_owner(clp, new); |
| 437 | spin_unlock(&clp->cl_lock); |
| 438 | if (sp == new) |
| 439 | get_rpccred(cred); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 440 | else { |
| 441 | rpc_destroy_wait_queue(&new->so_sequence.wait); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 442 | kfree(new); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 443 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 444 | return sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | } |
| 446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
| 448 | { |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 449 | struct nfs_client *clp = sp->so_server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | struct rpc_cred *cred = sp->so_cred; |
| 451 | |
| 452 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) |
| 453 | return; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 454 | nfs4_remove_state_owner(clp, sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 456 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | put_rpccred(cred); |
| 458 | kfree(sp); |
| 459 | } |
| 460 | |
| 461 | static struct nfs4_state * |
| 462 | nfs4_alloc_open_state(void) |
| 463 | { |
| 464 | struct nfs4_state *state; |
| 465 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 466 | state = kzalloc(sizeof(*state), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | if (!state) |
| 468 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | atomic_set(&state->count, 1); |
| 470 | INIT_LIST_HEAD(&state->lock_states); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 471 | spin_lock_init(&state->state_lock); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 472 | seqlock_init(&state->seqlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | return state; |
| 474 | } |
| 475 | |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 476 | void |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 477 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 478 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 479 | if (state->state == fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 480 | return; |
| 481 | /* NB! List reordering - see the reclaim code for why. */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 482 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
| 483 | if (fmode & FMODE_WRITE) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 484 | list_move(&state->open_states, &state->owner->so_states); |
| 485 | else |
| 486 | list_move_tail(&state->open_states, &state->owner->so_states); |
| 487 | } |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 488 | state->state = fmode; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 489 | } |
| 490 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | static struct nfs4_state * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) |
| 493 | { |
| 494 | struct nfs_inode *nfsi = NFS_I(inode); |
| 495 | struct nfs4_state *state; |
| 496 | |
| 497 | list_for_each_entry(state, &nfsi->open_states, inode_states) { |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 498 | if (state->owner != owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | continue; |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 500 | if (atomic_inc_not_zero(&state->count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | return state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | return NULL; |
| 504 | } |
| 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | static void |
| 507 | nfs4_free_open_state(struct nfs4_state *state) |
| 508 | { |
| 509 | kfree(state); |
| 510 | } |
| 511 | |
| 512 | struct nfs4_state * |
| 513 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) |
| 514 | { |
| 515 | struct nfs4_state *state, *new; |
| 516 | struct nfs_inode *nfsi = NFS_I(inode); |
| 517 | |
| 518 | spin_lock(&inode->i_lock); |
| 519 | state = __nfs4_find_state_byowner(inode, owner); |
| 520 | spin_unlock(&inode->i_lock); |
| 521 | if (state) |
| 522 | goto out; |
| 523 | new = nfs4_alloc_open_state(); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 524 | spin_lock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | spin_lock(&inode->i_lock); |
| 526 | state = __nfs4_find_state_byowner(inode, owner); |
| 527 | if (state == NULL && new != NULL) { |
| 528 | state = new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | state->owner = owner; |
| 530 | atomic_inc(&owner->so_count); |
| 531 | list_add(&state->inode_states, &nfsi->open_states); |
| 532 | state->inode = igrab(inode); |
| 533 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 534 | /* Note: The reclaim code dictates that we add stateless |
| 535 | * and read-only stateids to the end of the list */ |
| 536 | list_add_tail(&state->open_states, &owner->so_states); |
| 537 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | } else { |
| 539 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 540 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | if (new) |
| 542 | nfs4_free_open_state(new); |
| 543 | } |
| 544 | out: |
| 545 | return state; |
| 546 | } |
| 547 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | void nfs4_put_open_state(struct nfs4_state *state) |
| 549 | { |
| 550 | struct inode *inode = state->inode; |
| 551 | struct nfs4_state_owner *owner = state->owner; |
| 552 | |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 553 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | return; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 555 | spin_lock(&inode->i_lock); |
Trond Myklebust | ba68303 | 2007-07-27 10:23:05 -0400 | [diff] [blame] | 556 | list_del(&state->inode_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | list_del(&state->open_states); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 558 | spin_unlock(&inode->i_lock); |
| 559 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | nfs4_free_open_state(state); |
| 562 | nfs4_put_state_owner(owner); |
| 563 | } |
| 564 | |
| 565 | /* |
Trond Myklebust | 83c9d41 | 2005-10-18 14:20:13 -0700 | [diff] [blame] | 566 | * Close the current file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | */ |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 568 | static void __nfs4_close(struct path *path, struct nfs4_state *state, |
| 569 | fmode_t fmode, gfp_t gfp_mask, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | struct nfs4_state_owner *owner = state->owner; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 572 | int call_close = 0; |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 573 | fmode_t newstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
| 575 | atomic_inc(&owner->so_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | /* Protect against nfs4_find_state() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 577 | spin_lock(&owner->so_lock); |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 578 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 579 | case FMODE_READ: |
| 580 | state->n_rdonly--; |
| 581 | break; |
| 582 | case FMODE_WRITE: |
| 583 | state->n_wronly--; |
| 584 | break; |
| 585 | case FMODE_READ|FMODE_WRITE: |
| 586 | state->n_rdwr--; |
| 587 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 588 | newstate = FMODE_READ|FMODE_WRITE; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 589 | if (state->n_rdwr == 0) { |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 590 | if (state->n_rdonly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 591 | newstate &= ~FMODE_READ; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 592 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 593 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 594 | } |
| 595 | if (state->n_wronly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 596 | newstate &= ~FMODE_WRITE; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 597 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 598 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 599 | } |
| 600 | if (newstate == 0) |
| 601 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 602 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 603 | nfs4_state_set_mode_locked(state, newstate); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 604 | spin_unlock(&owner->so_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 605 | |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 606 | if (!call_close) { |
Trond Myklebust | b39e625 | 2007-06-11 23:05:07 -0400 | [diff] [blame] | 607 | nfs4_put_open_state(state); |
| 608 | nfs4_put_state_owner(owner); |
| 609 | } else |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 610 | nfs4_do_close(path, state, gfp_mask, wait); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 611 | } |
| 612 | |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 613 | 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] | 614 | { |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 615 | __nfs4_close(path, state, fmode, GFP_NOFS, 0); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 616 | } |
| 617 | |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 618 | 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] | 619 | { |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 620 | __nfs4_close(path, state, fmode, GFP_KERNEL, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | } |
| 622 | |
| 623 | /* |
| 624 | * Search the state->lock_states for an existing lock_owner |
| 625 | * that is compatible with current->files |
| 626 | */ |
| 627 | static struct nfs4_lock_state * |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 628 | __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] | 629 | { |
| 630 | struct nfs4_lock_state *pos; |
| 631 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 632 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | continue; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 634 | switch (pos->ls_owner.lo_type) { |
| 635 | case NFS4_POSIX_LOCK_TYPE: |
| 636 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) |
| 637 | continue; |
| 638 | break; |
| 639 | case NFS4_FLOCK_LOCK_TYPE: |
| 640 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) |
| 641 | continue; |
| 642 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | atomic_inc(&pos->ls_count); |
| 644 | return pos; |
| 645 | } |
| 646 | return NULL; |
| 647 | } |
| 648 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | /* |
| 650 | * Return a compatible lock_state. If no initialized lock_state structure |
| 651 | * exists, return an uninitialized one. |
| 652 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 654 | 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] | 655 | { |
| 656 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 657 | struct nfs_client *clp = state->owner->so_server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 659 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | if (lsp == NULL) |
| 661 | return NULL; |
Trond Myklebust | d0dc370 | 2008-01-10 16:07:54 -0500 | [diff] [blame] | 662 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
| 663 | spin_lock_init(&lsp->ls_sequence.lock); |
| 664 | INIT_LIST_HEAD(&lsp->ls_sequence.list); |
| 665 | lsp->ls_seqid.sequence = &lsp->ls_sequence; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | atomic_set(&lsp->ls_count, 1); |
Trond Myklebust | b64aec8 | 2009-07-21 16:47:46 -0400 | [diff] [blame] | 667 | lsp->ls_state = state; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 668 | lsp->ls_owner.lo_type = type; |
| 669 | switch (lsp->ls_owner.lo_type) { |
| 670 | case NFS4_FLOCK_LOCK_TYPE: |
| 671 | lsp->ls_owner.lo_u.flock_owner = fl_pid; |
| 672 | break; |
| 673 | case NFS4_POSIX_LOCK_TYPE: |
| 674 | lsp->ls_owner.lo_u.posix_owner = fl_owner; |
| 675 | break; |
| 676 | default: |
| 677 | kfree(lsp); |
| 678 | return NULL; |
| 679 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | spin_lock(&clp->cl_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 681 | nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 683 | INIT_LIST_HEAD(&lsp->ls_locks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | return lsp; |
| 685 | } |
| 686 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 687 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
| 688 | { |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 689 | struct nfs_client *clp = lsp->ls_state->owner->so_server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 690 | |
| 691 | spin_lock(&clp->cl_lock); |
| 692 | nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); |
| 693 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 694 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 695 | kfree(lsp); |
| 696 | } |
| 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | /* |
| 699 | * Return a compatible lock_state. If no initialized lock_state structure |
| 700 | * exists, return an uninitialized one. |
| 701 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 703 | 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] | 704 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 705 | struct nfs4_lock_state *lsp, *new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 707 | for(;;) { |
| 708 | spin_lock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 709 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 710 | if (lsp != NULL) |
| 711 | break; |
| 712 | if (new != NULL) { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 713 | list_add(&new->ls_locks, &state->lock_states); |
| 714 | set_bit(LK_STATE_IN_USE, &state->flags); |
| 715 | lsp = new; |
| 716 | new = NULL; |
| 717 | break; |
| 718 | } |
| 719 | spin_unlock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 720 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 721 | if (new == NULL) |
| 722 | return NULL; |
| 723 | } |
| 724 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 725 | if (new != NULL) |
| 726 | nfs4_free_lock_state(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | return lsp; |
| 728 | } |
| 729 | |
| 730 | /* |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 731 | * Release reference to lock_state, and free it if we see that |
| 732 | * it is no longer in use |
| 733 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 734 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 735 | { |
| 736 | struct nfs4_state *state; |
| 737 | |
| 738 | if (lsp == NULL) |
| 739 | return; |
| 740 | state = lsp->ls_state; |
| 741 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
| 742 | return; |
| 743 | list_del(&lsp->ls_locks); |
| 744 | if (list_empty(&state->lock_states)) |
| 745 | clear_bit(LK_STATE_IN_USE, &state->flags); |
| 746 | spin_unlock(&state->state_lock); |
Trond Myklebust | d3c7b7c | 2010-07-01 12:49:01 -0400 | [diff] [blame] | 747 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) |
| 748 | nfs4_release_lockowner(lsp); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 749 | nfs4_free_lock_state(lsp); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 750 | } |
| 751 | |
| 752 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
| 753 | { |
| 754 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
| 755 | |
| 756 | dst->fl_u.nfs4_fl.owner = lsp; |
| 757 | atomic_inc(&lsp->ls_count); |
| 758 | } |
| 759 | |
| 760 | static void nfs4_fl_release_lock(struct file_lock *fl) |
| 761 | { |
| 762 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
| 763 | } |
| 764 | |
Alexey Dobriyan | 6aed628 | 2009-09-21 17:01:11 -0700 | [diff] [blame] | 765 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 766 | .fl_copy_lock = nfs4_fl_copy_lock, |
| 767 | .fl_release_private = nfs4_fl_release_lock, |
| 768 | }; |
| 769 | |
| 770 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
| 771 | { |
| 772 | struct nfs4_lock_state *lsp; |
| 773 | |
| 774 | if (fl->fl_ops != NULL) |
| 775 | return 0; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 776 | if (fl->fl_flags & FL_POSIX) |
| 777 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); |
| 778 | else if (fl->fl_flags & FL_FLOCK) |
| 779 | lsp = nfs4_get_lock_state(state, 0, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE); |
| 780 | else |
| 781 | return -EINVAL; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 782 | if (lsp == NULL) |
| 783 | return -ENOMEM; |
| 784 | fl->fl_u.nfs4_fl.owner = lsp; |
| 785 | fl->fl_ops = &nfs4_fl_lock_ops; |
| 786 | return 0; |
| 787 | } |
| 788 | |
| 789 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | * Byte-range lock aware utility to initialize the stateid of read/write |
| 791 | * requests. |
| 792 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 793 | 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] | 794 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 795 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 796 | int seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 798 | do { |
| 799 | seq = read_seqbegin(&state->seqlock); |
| 800 | memcpy(dst, &state->stateid, sizeof(*dst)); |
| 801 | } while (read_seqretry(&state->seqlock, seq)); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 802 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
| 803 | return; |
| 804 | |
| 805 | spin_lock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 806 | 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] | 807 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
| 808 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); |
| 809 | spin_unlock(&state->state_lock); |
| 810 | nfs4_put_lock_state(lsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | } |
| 812 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 813 | 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] | 814 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 815 | struct nfs_seqid *new; |
| 816 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 817 | new = kmalloc(sizeof(*new), gfp_mask); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 818 | if (new != NULL) { |
| 819 | new->sequence = counter; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 820 | INIT_LIST_HEAD(&new->list); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 821 | } |
| 822 | return new; |
| 823 | } |
| 824 | |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 825 | void nfs_release_seqid(struct nfs_seqid *seqid) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 826 | { |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 827 | if (!list_empty(&seqid->list)) { |
| 828 | struct rpc_sequence *sequence = seqid->sequence->sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 829 | |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 830 | spin_lock(&sequence->lock); |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 831 | list_del_init(&seqid->list); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 832 | spin_unlock(&sequence->lock); |
| 833 | rpc_wake_up(&sequence->wait); |
| 834 | } |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | void nfs_free_seqid(struct nfs_seqid *seqid) |
| 838 | { |
| 839 | nfs_release_seqid(seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 840 | kfree(seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | } |
| 842 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 844 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
| 845 | * failed with a seqid incrementing error - |
| 846 | * see comments nfs_fs.h:seqid_mutating_error() |
| 847 | */ |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 848 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | { |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 850 | 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] | 851 | switch (status) { |
| 852 | case 0: |
| 853 | break; |
| 854 | case -NFS4ERR_BAD_SEQID: |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 855 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
| 856 | return; |
| 857 | printk(KERN_WARNING "NFS: v4 server returned a bad" |
Dan Muntz | 497799e | 2008-02-13 13:09:35 -0800 | [diff] [blame] | 858 | " sequence-id error on an" |
| 859 | " unconfirmed sequence %p!\n", |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 860 | seqid->sequence); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 861 | case -NFS4ERR_STALE_CLIENTID: |
| 862 | case -NFS4ERR_STALE_STATEID: |
| 863 | case -NFS4ERR_BAD_STATEID: |
| 864 | case -NFS4ERR_BADXDR: |
| 865 | case -NFS4ERR_RESOURCE: |
| 866 | case -NFS4ERR_NOFILEHANDLE: |
| 867 | /* Non-seqid mutating errors */ |
| 868 | return; |
| 869 | }; |
| 870 | /* |
| 871 | * Note: no locking needed as we are guaranteed to be first |
| 872 | * on the sequence list |
| 873 | */ |
| 874 | seqid->sequence->counter++; |
| 875 | } |
| 876 | |
| 877 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) |
| 878 | { |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 879 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
| 880 | struct nfs4_state_owner, so_seqid); |
| 881 | struct nfs_server *server = sp->so_server; |
| 882 | |
| 883 | if (status == -NFS4ERR_BAD_SEQID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | nfs4_drop_state_owner(sp); |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 885 | if (!nfs4_has_session(server->nfs_client)) |
| 886 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 890 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
| 891 | * failed with a seqid incrementing error - |
| 892 | * see comments nfs_fs.h:seqid_mutating_error() |
| 893 | */ |
| 894 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) |
| 895 | { |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 896 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 897 | } |
| 898 | |
| 899 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) |
| 900 | { |
| 901 | struct rpc_sequence *sequence = seqid->sequence->sequence; |
| 902 | int status = 0; |
| 903 | |
| 904 | spin_lock(&sequence->lock); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 905 | if (list_empty(&seqid->list)) |
| 906 | list_add_tail(&seqid->list, &sequence->list); |
| 907 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) |
| 908 | goto unlock; |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 909 | rpc_sleep_on(&sequence->wait, task, NULL); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 910 | status = -EAGAIN; |
| 911 | unlock: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 912 | spin_unlock(&sequence->lock); |
| 913 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | } |
| 915 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 916 | static int nfs4_run_state_manager(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 918 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 919 | { |
| 920 | smp_mb__before_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 921 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 922 | smp_mb__after_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 923 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 924 | rpc_wake_up(&clp->cl_rpcwaitq); |
| 925 | } |
| 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | /* |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 928 | * Schedule the nfs_client asynchronous state management routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | */ |
Trond Myklebust | b0d3ded | 2008-12-23 15:21:50 -0500 | [diff] [blame] | 930 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | { |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 932 | struct task_struct *task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 934 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 935 | return; |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 936 | __module_get(THIS_MODULE); |
| 937 | atomic_inc(&clp->cl_count); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 938 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 939 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 940 | RPC_DISPLAY_ADDR)); |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 941 | if (!IS_ERR(task)) |
| 942 | return; |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 943 | nfs4_clear_state_manager_bit(clp); |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 944 | nfs_put_client(clp); |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 945 | module_put(THIS_MODULE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | } |
| 947 | |
| 948 | /* |
| 949 | * Schedule a state recovery attempt |
| 950 | */ |
David Howells | adfa6f9 | 2006-08-22 20:06:08 -0400 | [diff] [blame] | 951 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | { |
| 953 | if (!clp) |
| 954 | return; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 955 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 956 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 957 | nfs4_schedule_state_manager(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
| 959 | |
Trond Myklebust | a2c0b9e | 2010-01-26 15:42:47 -0500 | [diff] [blame] | 960 | 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] | 961 | { |
| 962 | |
| 963 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 964 | /* Don't recover state that expired before the reboot */ |
| 965 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { |
| 966 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 967 | return 0; |
| 968 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 969 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 970 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 971 | return 1; |
| 972 | } |
| 973 | |
Trond Myklebust | 9e33bed | 2008-12-23 15:21:46 -0500 | [diff] [blame] | 974 | 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] | 975 | { |
| 976 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 977 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 978 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 979 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
| 980 | return 1; |
| 981 | } |
| 982 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 983 | 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] | 984 | { |
| 985 | struct inode *inode = state->inode; |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 986 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | struct file_lock *fl; |
| 988 | int status = 0; |
| 989 | |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 990 | if (inode->i_flock == NULL) |
| 991 | return 0; |
| 992 | |
| 993 | /* Guard against delegation returns and new lock/unlock calls */ |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 994 | down_write(&nfsi->rwsem); |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 995 | /* Protect inode->i_flock using the BKL */ |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 996 | lock_flocks(); |
Harvey Harrison | 90dc7d2 | 2008-02-20 13:03:05 -0800 | [diff] [blame] | 997 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 998 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | continue; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 1000 | if (nfs_file_open_context(fl->fl_file)->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | continue; |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1002 | unlock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | status = ops->recover_lock(state, fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | switch (status) { |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1005 | case 0: |
| 1006 | break; |
| 1007 | case -ESTALE: |
| 1008 | case -NFS4ERR_ADMIN_REVOKED: |
| 1009 | case -NFS4ERR_STALE_STATEID: |
| 1010 | case -NFS4ERR_BAD_STATEID: |
| 1011 | case -NFS4ERR_EXPIRED: |
| 1012 | case -NFS4ERR_NO_GRACE: |
| 1013 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1014 | case -NFS4ERR_BADSESSION: |
| 1015 | case -NFS4ERR_BADSLOT: |
| 1016 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1017 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1018 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | default: |
| 1020 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1021 | __func__, status); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1022 | case -ENOMEM: |
| 1023 | case -NFS4ERR_DENIED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | case -NFS4ERR_RECLAIM_BAD: |
| 1025 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 1026 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1027 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | } |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1029 | lock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | } |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1031 | unlock_flocks(); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1032 | out: |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1033 | up_write(&nfsi->rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | return status; |
| 1035 | } |
| 1036 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1037 | 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] | 1038 | { |
| 1039 | struct nfs4_state *state; |
| 1040 | struct nfs4_lock_state *lock; |
| 1041 | int status = 0; |
| 1042 | |
| 1043 | /* Note: we rely on the sp->so_states list being ordered |
| 1044 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) |
| 1045 | * states first. |
| 1046 | * This is needed to ensure that the server won't give us any |
| 1047 | * read delegations that we have to return if, say, we are |
| 1048 | * recovering after a network partition or a reboot from a |
| 1049 | * server that doesn't support a grace period. |
| 1050 | */ |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1051 | restart: |
| 1052 | spin_lock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1054 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
| 1055 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | if (state->state == 0) |
| 1057 | continue; |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1058 | atomic_inc(&state->count); |
| 1059 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | status = ops->recover_open(sp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | if (status >= 0) { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1062 | status = nfs4_reclaim_locks(state, ops); |
| 1063 | if (status >= 0) { |
| 1064 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
| 1065 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) |
| 1066 | printk("%s: Lock reclaim failed!\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1067 | __func__); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1068 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1069 | nfs4_put_open_state(state); |
| 1070 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | } |
| 1073 | switch (status) { |
| 1074 | default: |
| 1075 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1076 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | case -ENOENT: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1078 | case -ENOMEM: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1079 | case -ESTALE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | /* |
| 1081 | * Open state on this file cannot be recovered |
| 1082 | * All we can do is revert to using the zero stateid. |
| 1083 | */ |
| 1084 | memset(state->stateid.data, 0, |
| 1085 | sizeof(state->stateid.data)); |
| 1086 | /* Mark the file as being 'closed' */ |
| 1087 | state->state = 0; |
| 1088 | break; |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1089 | case -EKEYEXPIRED: |
| 1090 | /* |
| 1091 | * User RPCSEC_GSS context has expired. |
| 1092 | * We cannot recover this stateid now, so |
| 1093 | * skip it and allow recovery thread to |
| 1094 | * proceed. |
| 1095 | */ |
| 1096 | break; |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1097 | case -NFS4ERR_ADMIN_REVOKED: |
| 1098 | case -NFS4ERR_STALE_STATEID: |
| 1099 | case -NFS4ERR_BAD_STATEID: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1100 | case -NFS4ERR_RECLAIM_BAD: |
| 1101 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1102 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1103 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | case -NFS4ERR_EXPIRED: |
| 1105 | case -NFS4ERR_NO_GRACE: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1106 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1108 | case -NFS4ERR_BADSESSION: |
| 1109 | case -NFS4ERR_BADSLOT: |
| 1110 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1111 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | goto out_err; |
| 1113 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1114 | nfs4_put_open_state(state); |
| 1115 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1117 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | return 0; |
| 1119 | out_err: |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1120 | nfs4_put_open_state(state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | return status; |
| 1122 | } |
| 1123 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1124 | static void nfs4_clear_open_state(struct nfs4_state *state) |
| 1125 | { |
| 1126 | struct nfs4_lock_state *lock; |
| 1127 | |
| 1128 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1129 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1130 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1131 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
| 1132 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1133 | lock->ls_seqid.flags = 0; |
| 1134 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; |
| 1135 | } |
| 1136 | } |
| 1137 | |
| 1138 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1139 | { |
| 1140 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1141 | struct rb_node *pos; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1142 | struct nfs4_state *state; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1143 | |
| 1144 | /* Reset all sequence ids to zero */ |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1145 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 1146 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1147 | sp->so_seqid.flags = 0; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1148 | spin_lock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1149 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1150 | if (mark_reclaim(clp, state)) |
| 1151 | nfs4_clear_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1152 | } |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1153 | spin_unlock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1154 | } |
| 1155 | } |
| 1156 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1157 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
| 1158 | { |
| 1159 | /* Mark all delegations for reclaim */ |
| 1160 | nfs_delegation_mark_reclaim(clp); |
| 1161 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); |
| 1162 | } |
| 1163 | |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1164 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
| 1165 | const struct nfs4_state_recovery_ops *ops) |
| 1166 | { |
| 1167 | /* Notify the server we're done reclaiming our state */ |
| 1168 | if (ops->reclaim_complete) |
| 1169 | (void)ops->reclaim_complete(clp); |
| 1170 | } |
| 1171 | |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1172 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1173 | { |
| 1174 | struct nfs4_state_owner *sp; |
| 1175 | struct rb_node *pos; |
| 1176 | struct nfs4_state *state; |
| 1177 | |
| 1178 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1179 | return 0; |
Ricardo Labiaga | 7cab89b | 2009-12-08 14:35:28 -0500 | [diff] [blame] | 1180 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1181 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 1182 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
| 1183 | spin_lock(&sp->so_lock); |
| 1184 | list_for_each_entry(state, &sp->so_states, open_states) { |
| 1185 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) |
| 1186 | continue; |
| 1187 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1188 | } |
| 1189 | spin_unlock(&sp->so_lock); |
| 1190 | } |
| 1191 | |
| 1192 | nfs_delegation_reap_unclaimed(clp); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1193 | return 1; |
| 1194 | } |
| 1195 | |
| 1196 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
| 1197 | { |
| 1198 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
| 1199 | return; |
| 1200 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1201 | } |
| 1202 | |
| 1203 | static void nfs_delegation_clear_all(struct nfs_client *clp) |
| 1204 | { |
| 1205 | nfs_delegation_mark_reclaim(clp); |
| 1206 | nfs_delegation_reap_unclaimed(clp); |
| 1207 | } |
| 1208 | |
| 1209 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
| 1210 | { |
| 1211 | nfs_delegation_clear_all(clp); |
| 1212 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 1213 | } |
| 1214 | |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1215 | static void nfs4_warn_keyexpired(const char *s) |
| 1216 | { |
| 1217 | printk_ratelimited(KERN_WARNING "Error: state manager" |
| 1218 | " encountered RPCSEC_GSS session" |
| 1219 | " expired against NFSv4 server %s.\n", |
| 1220 | s); |
| 1221 | } |
| 1222 | |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1223 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1224 | { |
| 1225 | switch (error) { |
| 1226 | case -NFS4ERR_CB_PATH_DOWN: |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1227 | nfs_handle_cb_pathdown(clp); |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1228 | return 0; |
Trond Myklebust | c8b7ae3d | 2009-12-03 15:53:21 -0500 | [diff] [blame] | 1229 | case -NFS4ERR_NO_GRACE: |
| 1230 | nfs4_state_end_reclaim_reboot(clp); |
| 1231 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1232 | case -NFS4ERR_STALE_CLIENTID: |
| 1233 | case -NFS4ERR_LEASE_MOVED: |
| 1234 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1235 | nfs4_state_clear_reclaim_reboot(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1236 | nfs4_state_start_reclaim_reboot(clp); |
| 1237 | break; |
| 1238 | case -NFS4ERR_EXPIRED: |
| 1239 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1240 | nfs4_state_start_reclaim_nograce(clp); |
Andy Adamson | 8ba9bf8 | 2009-12-04 15:55:34 -0500 | [diff] [blame] | 1241 | break; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1242 | case -NFS4ERR_BADSESSION: |
| 1243 | case -NFS4ERR_BADSLOT: |
| 1244 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1245 | case -NFS4ERR_DEADSESSION: |
| 1246 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1247 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 1248 | case -NFS4ERR_SEQ_MISORDERED: |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1249 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 0b9e2d4 | 2009-12-04 16:02:14 -0500 | [diff] [blame] | 1250 | /* Zero session reset errors */ |
| 1251 | return 0; |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1252 | case -EKEYEXPIRED: |
| 1253 | /* Nothing we can do */ |
| 1254 | nfs4_warn_keyexpired(clp->cl_hostname); |
| 1255 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1256 | } |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1257 | return error; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1258 | } |
| 1259 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1260 | 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] | 1261 | { |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1262 | struct rb_node *pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | int status = 0; |
| 1264 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1265 | restart: |
| 1266 | spin_lock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1267 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
| 1268 | struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1269 | if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) |
| 1270 | continue; |
| 1271 | atomic_inc(&sp->so_count); |
| 1272 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1273 | status = nfs4_reclaim_open_state(sp, ops); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1274 | if (status < 0) { |
| 1275 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
| 1276 | nfs4_put_state_owner(sp); |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1277 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1278 | } |
| 1279 | nfs4_put_state_owner(sp); |
| 1280 | goto restart; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1281 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1282 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1283 | return status; |
| 1284 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1286 | static int nfs4_check_lease(struct nfs_client *clp) |
| 1287 | { |
| 1288 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1289 | const struct nfs4_state_maintenance_ops *ops = |
| 1290 | clp->cl_mvops->state_renewal_ops; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1291 | int status = -NFS4ERR_EXPIRED; |
| 1292 | |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1293 | /* Is the client already known to have an expired lease? */ |
| 1294 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1295 | return 0; |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 1296 | spin_lock(&clp->cl_lock); |
| 1297 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1298 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1299 | if (cred == NULL) { |
| 1300 | cred = nfs4_get_setclientid_cred(clp); |
| 1301 | if (cred == NULL) |
| 1302 | goto out; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1303 | } |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1304 | status = ops->renew_lease(clp, cred); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1305 | put_rpccred(cred); |
| 1306 | out: |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1307 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1308 | } |
| 1309 | |
| 1310 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
| 1311 | { |
| 1312 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1313 | const struct nfs4_state_recovery_ops *ops = |
| 1314 | clp->cl_mvops->reboot_recovery_ops; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1315 | int status = -ENOENT; |
| 1316 | |
Andy Adamson | 90a1661 | 2009-04-01 09:22:48 -0400 | [diff] [blame] | 1317 | cred = ops->get_clid_cred(clp); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1318 | if (cred != NULL) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1319 | status = ops->establish_clid(clp, cred); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1320 | put_rpccred(cred); |
| 1321 | /* Handle case where the user hasn't set up machine creds */ |
| 1322 | if (status == -EACCES && cred == clp->cl_machine_cred) { |
| 1323 | nfs4_clear_machine_cred(clp); |
| 1324 | status = -EAGAIN; |
| 1325 | } |
Benny Halevy | c2e713d | 2009-04-01 09:21:51 -0400 | [diff] [blame] | 1326 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
| 1327 | status = -EPROTONOSUPPORT; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1328 | } |
| 1329 | return status; |
| 1330 | } |
| 1331 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1332 | #ifdef CONFIG_NFS_V4_1 |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1333 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
| 1334 | { |
| 1335 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); |
| 1336 | nfs4_schedule_state_recovery(clp); |
| 1337 | } |
| 1338 | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1339 | static void nfs4_reset_all_state(struct nfs_client *clp) |
| 1340 | { |
| 1341 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 1342 | clp->cl_boot_time = CURRENT_TIME; |
| 1343 | nfs4_state_start_reclaim_nograce(clp); |
| 1344 | nfs4_schedule_state_recovery(clp); |
| 1345 | } |
| 1346 | } |
| 1347 | |
| 1348 | static void nfs41_handle_server_reboot(struct nfs_client *clp) |
| 1349 | { |
| 1350 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 1351 | nfs4_state_start_reclaim_reboot(clp); |
| 1352 | nfs4_schedule_state_recovery(clp); |
| 1353 | } |
| 1354 | } |
| 1355 | |
| 1356 | static void nfs41_handle_state_revoked(struct nfs_client *clp) |
| 1357 | { |
| 1358 | /* Temporary */ |
| 1359 | nfs4_reset_all_state(clp); |
| 1360 | } |
| 1361 | |
| 1362 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
| 1363 | { |
| 1364 | /* This will need to handle layouts too */ |
| 1365 | nfs_expire_all_delegations(clp); |
| 1366 | } |
| 1367 | |
| 1368 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
| 1369 | { |
| 1370 | nfs_expire_all_delegations(clp); |
| 1371 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) |
| 1372 | nfs4_schedule_state_recovery(clp); |
| 1373 | } |
| 1374 | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1375 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
| 1376 | { |
| 1377 | if (!flags) |
| 1378 | return; |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1379 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
| 1380 | nfs41_handle_server_reboot(clp); |
| 1381 | else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1382 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
| 1383 | SEQ4_STATUS_ADMIN_STATE_REVOKED | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1384 | SEQ4_STATUS_LEASE_MOVED)) |
| 1385 | nfs41_handle_state_revoked(clp); |
| 1386 | else if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
| 1387 | nfs41_handle_recallable_state_revoked(clp); |
| 1388 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1389 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
| 1390 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1391 | nfs41_handle_cb_path_down(clp); |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1392 | } |
| 1393 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1394 | static int nfs4_reset_session(struct nfs_client *clp) |
| 1395 | { |
| 1396 | int status; |
| 1397 | |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 1398 | nfs4_begin_drain_session(clp); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1399 | status = nfs4_proc_destroy_session(clp->cl_session); |
| 1400 | if (status && status != -NFS4ERR_BADSESSION && |
| 1401 | status != -NFS4ERR_DEADSESSION) { |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 1402 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1403 | goto out; |
| 1404 | } |
| 1405 | |
| 1406 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
Trond Myklebust | f26468f | 2009-12-05 19:32:11 -0500 | [diff] [blame] | 1407 | status = nfs4_proc_create_session(clp); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1408 | if (status) { |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 1409 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1410 | goto out; |
| 1411 | } |
| 1412 | /* create_session negotiated new slot table */ |
| 1413 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 1414 | |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1415 | /* Let the state manager reestablish state */ |
| 1416 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1417 | nfs41_setup_state_renewal(clp); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1418 | out: |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1419 | return status; |
| 1420 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1421 | |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1422 | static int nfs4_recall_slot(struct nfs_client *clp) |
| 1423 | { |
| 1424 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; |
| 1425 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; |
| 1426 | struct nfs4_slot *new, *old; |
| 1427 | int i; |
| 1428 | |
| 1429 | nfs4_begin_drain_session(clp); |
| 1430 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1431 | GFP_NOFS); |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1432 | if (!new) |
| 1433 | return -ENOMEM; |
| 1434 | |
| 1435 | spin_lock(&fc_tbl->slot_tbl_lock); |
| 1436 | for (i = 0; i < fc_tbl->target_max_slots; i++) |
| 1437 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; |
| 1438 | old = fc_tbl->slots; |
| 1439 | fc_tbl->slots = new; |
| 1440 | fc_tbl->max_slots = fc_tbl->target_max_slots; |
| 1441 | fc_tbl->target_max_slots = 0; |
| 1442 | fc_attrs->max_reqs = fc_tbl->max_slots; |
| 1443 | spin_unlock(&fc_tbl->slot_tbl_lock); |
| 1444 | |
| 1445 | kfree(old); |
| 1446 | nfs4_end_drain_session(clp); |
| 1447 | return 0; |
| 1448 | } |
| 1449 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1450 | #else /* CONFIG_NFS_V4_1 */ |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1451 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1452 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1453 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1454 | #endif /* CONFIG_NFS_V4_1 */ |
| 1455 | |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1456 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
| 1457 | * on EXCHANGE_ID for v4.1 |
| 1458 | */ |
| 1459 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) |
| 1460 | { |
| 1461 | if (nfs4_has_session(clp)) { |
| 1462 | switch (status) { |
| 1463 | case -NFS4ERR_DELAY: |
| 1464 | case -NFS4ERR_CLID_INUSE: |
| 1465 | case -EAGAIN: |
| 1466 | break; |
| 1467 | |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1468 | case -EKEYEXPIRED: |
| 1469 | nfs4_warn_keyexpired(clp->cl_hostname); |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1470 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 1471 | * in nfs4_exchange_id */ |
| 1472 | default: |
| 1473 | return; |
| 1474 | } |
| 1475 | } |
| 1476 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1477 | } |
| 1478 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1479 | static void nfs4_state_manager(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1480 | { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1481 | int status = 0; |
| 1482 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1483 | /* Ensure exclusive access to NFSv4 state */ |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1484 | for(;;) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1485 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
| 1486 | /* We're going to have to re-establish a clientid */ |
| 1487 | status = nfs4_reclaim_lease(clp); |
| 1488 | if (status) { |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1489 | nfs4_set_lease_expired(clp, status); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1490 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
| 1491 | &clp->cl_state)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1492 | continue; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1493 | if (clp->cl_cons_state == |
| 1494 | NFS_CS_SESSION_INITING) |
| 1495 | nfs_mark_client_ready(clp, status); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1496 | goto out_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | } |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1498 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Ricardo Labiaga | 7cab89b | 2009-12-08 14:35:28 -0500 | [diff] [blame] | 1499 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1500 | pnfs_destroy_all_layouts(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1501 | } |
| 1502 | |
| 1503 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
| 1504 | status = nfs4_check_lease(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1505 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1506 | continue; |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1507 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
| 1508 | goto out_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1510 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1511 | /* Initialize or reset the session */ |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1512 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
Trond Myklebust | 7111dc7 | 2009-08-24 19:21:29 -0400 | [diff] [blame] | 1513 | && nfs4_has_session(clp)) { |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 1514 | status = nfs4_reset_session(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1515 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1516 | continue; |
| 1517 | if (status < 0) |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1518 | goto out_error; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1519 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1520 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1521 | /* First recover reboot state... */ |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 1522 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1523 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1524 | clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1525 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1526 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1527 | continue; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1528 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1529 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 1530 | continue; |
| 1531 | if (status < 0) |
| 1532 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1533 | } |
| 1534 | |
| 1535 | /* Now recover expired state... */ |
| 1536 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1537 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1538 | clp->cl_mvops->nograce_recovery_ops); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1539 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1540 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1541 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1542 | continue; |
| 1543 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1544 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1545 | } |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1546 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1547 | nfs4_end_drain_session(clp); |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1548 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
| 1549 | nfs_client_return_marked_delegations(clp); |
| 1550 | continue; |
| 1551 | } |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1552 | /* Recall session slots */ |
| 1553 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) |
| 1554 | && nfs4_has_session(clp)) { |
| 1555 | status = nfs4_recall_slot(clp); |
| 1556 | if (status < 0) |
| 1557 | goto out_error; |
| 1558 | continue; |
| 1559 | } |
| 1560 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1561 | |
| 1562 | nfs4_clear_state_manager_bit(clp); |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1563 | /* Did we race with an attempt to give us more work? */ |
| 1564 | if (clp->cl_state == 0) |
| 1565 | break; |
| 1566 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1567 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | } |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1569 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | out_error: |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1571 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 1572 | " with error %d\n", clp->cl_hostname, -status); |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1573 | nfs4_end_drain_session(clp); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1574 | nfs4_clear_state_manager_bit(clp); |
| 1575 | } |
| 1576 | |
| 1577 | static int nfs4_run_state_manager(void *ptr) |
| 1578 | { |
| 1579 | struct nfs_client *clp = ptr; |
| 1580 | |
| 1581 | allow_signal(SIGKILL); |
| 1582 | nfs4_state_manager(clp); |
| 1583 | nfs_put_client(clp); |
| 1584 | module_put_and_exit(0); |
| 1585 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | } |
| 1587 | |
| 1588 | /* |
| 1589 | * Local variables: |
| 1590 | * c-basic-offset: 8 |
| 1591 | * End: |
| 1592 | */ |