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> |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 52 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 54 | #include "nfs4_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #include "callback.h" |
| 56 | #include "delegation.h" |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 57 | #include "internal.h" |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 58 | #include "pnfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | #define OPENOWNER_POOL_SIZE 8 |
| 61 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 62 | const nfs4_stateid zero_stateid; |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | static LIST_HEAD(nfs4_clientid_list); |
| 65 | |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 66 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | { |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 68 | struct nfs4_setclientid_res clid = { |
| 69 | .clientid = clp->cl_clientid, |
| 70 | .confirm = clp->cl_confirm, |
| 71 | }; |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 72 | unsigned short port; |
| 73 | int status; |
| 74 | |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 75 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
| 76 | goto do_confirm; |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 77 | port = nfs_callback_tcpport; |
| 78 | if (clp->cl_addr.ss_family == AF_INET6) |
| 79 | port = nfs_callback_tcpport6; |
| 80 | |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 81 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
| 82 | if (status != 0) |
| 83 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 84 | clp->cl_clientid = clid.clientid; |
| 85 | clp->cl_confirm = clid.confirm; |
| 86 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 87 | do_confirm: |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 88 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
| 89 | if (status != 0) |
| 90 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 91 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 92 | nfs4_schedule_state_renewal(clp); |
| 93 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | return status; |
| 95 | } |
| 96 | |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 97 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 98 | { |
| 99 | struct rpc_cred *cred = NULL; |
| 100 | |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 101 | if (clp->cl_machine_cred != NULL) |
| 102 | cred = get_rpccred(clp->cl_machine_cred); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 103 | return cred; |
| 104 | } |
| 105 | |
| 106 | static void nfs4_clear_machine_cred(struct nfs_client *clp) |
| 107 | { |
| 108 | struct rpc_cred *cred; |
| 109 | |
| 110 | spin_lock(&clp->cl_lock); |
| 111 | cred = clp->cl_machine_cred; |
| 112 | clp->cl_machine_cred = NULL; |
| 113 | spin_unlock(&clp->cl_lock); |
| 114 | if (cred != NULL) |
| 115 | put_rpccred(cred); |
| 116 | } |
| 117 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 118 | static struct rpc_cred * |
| 119 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 120 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 121 | struct rpc_cred *cred = NULL; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 122 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 123 | struct rb_node *pos; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 124 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 125 | for (pos = rb_first(&server->state_owners); |
| 126 | pos != NULL; |
| 127 | pos = rb_next(pos)) { |
| 128 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 129 | if (list_empty(&sp->so_states)) |
| 130 | continue; |
| 131 | cred = get_rpccred(sp->so_cred); |
| 132 | break; |
| 133 | } |
| 134 | return cred; |
| 135 | } |
| 136 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 137 | /** |
| 138 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation |
| 139 | * @clp: client state handle |
| 140 | * |
| 141 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 142 | * Caller must hold clp->cl_lock. |
| 143 | */ |
| 144 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) |
| 145 | { |
| 146 | struct rpc_cred *cred = NULL; |
| 147 | struct nfs_server *server; |
| 148 | |
| 149 | rcu_read_lock(); |
| 150 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 151 | cred = nfs4_get_renew_cred_server_locked(server); |
| 152 | if (cred != NULL) |
| 153 | break; |
| 154 | } |
| 155 | rcu_read_unlock(); |
| 156 | return cred; |
| 157 | } |
| 158 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 159 | #if defined(CONFIG_NFS_V4_1) |
| 160 | |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 161 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
| 162 | { |
| 163 | int status; |
| 164 | struct nfs_fsinfo fsinfo; |
| 165 | |
Andy Adamson | d6fb79d | 2011-03-01 01:34:11 +0000 | [diff] [blame] | 166 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { |
| 167 | nfs4_schedule_state_renewal(clp); |
| 168 | return 0; |
| 169 | } |
| 170 | |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 171 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
| 172 | if (status == 0) { |
| 173 | /* Update lease time and schedule renewal */ |
| 174 | spin_lock(&clp->cl_lock); |
| 175 | clp->cl_lease_time = fsinfo.lease_time * HZ; |
| 176 | clp->cl_last_renewal = jiffies; |
| 177 | spin_unlock(&clp->cl_lock); |
| 178 | |
| 179 | nfs4_schedule_state_renewal(clp); |
| 180 | } |
| 181 | |
| 182 | return status; |
| 183 | } |
| 184 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 185 | /* |
| 186 | * Back channel returns NFS4ERR_DELAY for new requests when |
| 187 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining |
| 188 | * is ended. |
| 189 | */ |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 190 | static void nfs4_end_drain_session(struct nfs_client *clp) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 191 | { |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 192 | struct nfs4_session *ses = clp->cl_session; |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 193 | int max_slots; |
| 194 | |
Trond Myklebust | a2118c3 | 2010-06-16 09:52:26 -0400 | [diff] [blame] | 195 | if (ses == NULL) |
| 196 | return; |
| 197 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 198 | spin_lock(&ses->fc_slot_table.slot_tbl_lock); |
| 199 | max_slots = ses->fc_slot_table.max_slots; |
| 200 | while (max_slots--) { |
| 201 | struct rpc_task *task; |
| 202 | |
| 203 | task = rpc_wake_up_next(&ses->fc_slot_table. |
| 204 | slot_tbl_waitq); |
| 205 | if (!task) |
| 206 | break; |
| 207 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
| 208 | } |
| 209 | spin_unlock(&ses->fc_slot_table.slot_tbl_lock); |
| 210 | } |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 211 | } |
| 212 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 213 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 214 | { |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 215 | spin_lock(&tbl->slot_tbl_lock); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 216 | if (tbl->highest_used_slotid != -1) { |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 217 | INIT_COMPLETION(tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 218 | spin_unlock(&tbl->slot_tbl_lock); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 219 | return wait_for_completion_interruptible(&tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 220 | } |
| 221 | spin_unlock(&tbl->slot_tbl_lock); |
| 222 | return 0; |
| 223 | } |
| 224 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 225 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
| 226 | { |
| 227 | struct nfs4_session *ses = clp->cl_session; |
| 228 | int ret = 0; |
| 229 | |
| 230 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); |
| 231 | /* back channel */ |
| 232 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); |
| 233 | if (ret) |
| 234 | return ret; |
| 235 | /* fore channel */ |
| 236 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); |
| 237 | } |
| 238 | |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 239 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
| 240 | { |
| 241 | int status; |
| 242 | |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 243 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
| 244 | goto do_confirm; |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 245 | nfs4_begin_drain_session(clp); |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 246 | status = nfs4_proc_exchange_id(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 247 | if (status != 0) |
| 248 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 249 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 250 | do_confirm: |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 251 | status = nfs4_proc_create_session(clp); |
| 252 | if (status != 0) |
| 253 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 254 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 255 | nfs41_setup_state_renewal(clp); |
| 256 | nfs_mark_client_ready(clp, NFS_CS_READY); |
| 257 | out: |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 258 | return status; |
| 259 | } |
| 260 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 261 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
| 262 | { |
| 263 | struct rpc_cred *cred; |
| 264 | |
| 265 | spin_lock(&clp->cl_lock); |
| 266 | cred = nfs4_get_machine_cred_locked(clp); |
| 267 | spin_unlock(&clp->cl_lock); |
| 268 | return cred; |
| 269 | } |
| 270 | |
| 271 | #endif /* CONFIG_NFS_V4_1 */ |
| 272 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 273 | static struct rpc_cred * |
| 274 | nfs4_get_setclientid_cred_server(struct nfs_server *server) |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 275 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 276 | struct nfs_client *clp = server->nfs_client; |
| 277 | struct rpc_cred *cred = NULL; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 278 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 279 | struct rb_node *pos; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 280 | |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 281 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 282 | pos = rb_first(&server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 283 | if (pos != NULL) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 284 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 285 | cred = get_rpccred(sp->so_cred); |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 286 | } |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 287 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 288 | return cred; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 289 | } |
| 290 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 291 | /** |
| 292 | * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation |
| 293 | * @clp: client state handle |
| 294 | * |
| 295 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 296 | */ |
| 297 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
| 298 | { |
| 299 | struct nfs_server *server; |
| 300 | struct rpc_cred *cred; |
| 301 | |
| 302 | spin_lock(&clp->cl_lock); |
| 303 | cred = nfs4_get_machine_cred_locked(clp); |
| 304 | spin_unlock(&clp->cl_lock); |
| 305 | if (cred != NULL) |
| 306 | goto out; |
| 307 | |
| 308 | rcu_read_lock(); |
| 309 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 310 | cred = nfs4_get_setclientid_cred_server(server); |
| 311 | if (cred != NULL) |
| 312 | break; |
| 313 | } |
| 314 | rcu_read_unlock(); |
| 315 | |
| 316 | out: |
| 317 | return cred; |
| 318 | } |
| 319 | |
| 320 | static void nfs_alloc_unique_id_locked(struct rb_root *root, |
| 321 | struct nfs_unique_id *new, |
| 322 | __u64 minval, int maxbits) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 323 | { |
| 324 | struct rb_node **p, *parent; |
| 325 | struct nfs_unique_id *pos; |
| 326 | __u64 mask = ~0ULL; |
| 327 | |
| 328 | if (maxbits < 64) |
| 329 | mask = (1ULL << maxbits) - 1ULL; |
| 330 | |
| 331 | /* Ensure distribution is more or less flat */ |
| 332 | get_random_bytes(&new->id, sizeof(new->id)); |
| 333 | new->id &= mask; |
| 334 | if (new->id < minval) |
| 335 | new->id += minval; |
| 336 | retry: |
| 337 | p = &root->rb_node; |
| 338 | parent = NULL; |
| 339 | |
| 340 | while (*p != NULL) { |
| 341 | parent = *p; |
| 342 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); |
| 343 | |
| 344 | if (new->id < pos->id) |
| 345 | p = &(*p)->rb_left; |
| 346 | else if (new->id > pos->id) |
| 347 | p = &(*p)->rb_right; |
| 348 | else |
| 349 | goto id_exists; |
| 350 | } |
| 351 | rb_link_node(&new->rb_node, parent, p); |
| 352 | rb_insert_color(&new->rb_node, root); |
| 353 | return; |
| 354 | id_exists: |
| 355 | for (;;) { |
| 356 | new->id++; |
| 357 | if (new->id < minval || (new->id & mask) != new->id) { |
| 358 | new->id = minval; |
| 359 | break; |
| 360 | } |
| 361 | parent = rb_next(parent); |
| 362 | if (parent == NULL) |
| 363 | break; |
| 364 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); |
| 365 | if (new->id < pos->id) |
| 366 | break; |
| 367 | } |
| 368 | goto retry; |
| 369 | } |
| 370 | |
| 371 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) |
| 372 | { |
| 373 | rb_erase(&id->rb_node, root); |
| 374 | } |
| 375 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 377 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 379 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 380 | *parent = NULL; |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 381 | struct nfs4_state_owner *sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 383 | while (*p != NULL) { |
| 384 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 385 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 386 | |
| 387 | if (cred < sp->so_cred) |
| 388 | p = &parent->rb_left; |
| 389 | else if (cred > sp->so_cred) |
| 390 | p = &parent->rb_right; |
| 391 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 392 | if (!list_empty(&sp->so_lru)) |
| 393 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 394 | atomic_inc(&sp->so_count); |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 395 | return sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 396 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 398 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
| 400 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 401 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 402 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 403 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 404 | struct nfs_server *server = new->so_server; |
| 405 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 406 | *parent = NULL; |
| 407 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame^] | 408 | int err; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 409 | |
| 410 | while (*p != NULL) { |
| 411 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 412 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 413 | |
| 414 | if (new->so_cred < sp->so_cred) |
| 415 | p = &parent->rb_left; |
| 416 | else if (new->so_cred > sp->so_cred) |
| 417 | p = &parent->rb_right; |
| 418 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 419 | if (!list_empty(&sp->so_lru)) |
| 420 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 421 | atomic_inc(&sp->so_count); |
| 422 | return sp; |
| 423 | } |
| 424 | } |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame^] | 425 | err = ida_get_new(&server->openowner_id, &new->so_owner_id); |
| 426 | if (err) |
| 427 | return ERR_PTR(err); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 428 | rb_link_node(&new->so_server_node, parent, p); |
| 429 | rb_insert_color(&new->so_server_node, &server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 430 | return new; |
| 431 | } |
| 432 | |
| 433 | static void |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 434 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 435 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 436 | struct nfs_server *server = sp->so_server; |
| 437 | |
| 438 | if (!RB_EMPTY_NODE(&sp->so_server_node)) |
| 439 | rb_erase(&sp->so_server_node, &server->state_owners); |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame^] | 440 | ida_remove(&server->openowner_id, sp->so_owner_id); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 441 | } |
| 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | /* |
| 444 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to |
| 445 | * create a new state_owner. |
| 446 | * |
| 447 | */ |
| 448 | static struct nfs4_state_owner * |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 449 | nfs4_alloc_state_owner(struct nfs_server *server, |
| 450 | struct rpc_cred *cred, |
| 451 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | { |
| 453 | struct nfs4_state_owner *sp; |
| 454 | |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 455 | sp = kzalloc(sizeof(*sp), gfp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | if (!sp) |
| 457 | return NULL; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 458 | sp->so_server = server; |
| 459 | sp->so_cred = get_rpccred(cred); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 460 | spin_lock_init(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | INIT_LIST_HEAD(&sp->so_states); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 462 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
| 463 | sp->so_seqid.sequence = &sp->so_sequence; |
| 464 | spin_lock_init(&sp->so_sequence.lock); |
| 465 | INIT_LIST_HEAD(&sp->so_sequence.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | atomic_set(&sp->so_count, 1); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 467 | INIT_LIST_HEAD(&sp->so_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | return sp; |
| 469 | } |
| 470 | |
Adrian Bunk | 1d2e88e | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 471 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
| 473 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 474 | if (!RB_EMPTY_NODE(&sp->so_server_node)) { |
| 475 | struct nfs_server *server = sp->so_server; |
| 476 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 477 | |
| 478 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 479 | rb_erase(&sp->so_server_node, &server->state_owners); |
| 480 | RB_CLEAR_NODE(&sp->so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 481 | spin_unlock(&clp->cl_lock); |
| 482 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | } |
| 484 | |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 485 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
| 486 | { |
| 487 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
| 488 | put_rpccred(sp->so_cred); |
| 489 | kfree(sp); |
| 490 | } |
| 491 | |
| 492 | static void nfs4_gc_state_owners(struct nfs_server *server) |
| 493 | { |
| 494 | struct nfs_client *clp = server->nfs_client; |
| 495 | struct nfs4_state_owner *sp, *tmp; |
| 496 | unsigned long time_min, time_max; |
| 497 | LIST_HEAD(doomed); |
| 498 | |
| 499 | spin_lock(&clp->cl_lock); |
| 500 | time_max = jiffies; |
| 501 | time_min = (long)time_max - (long)clp->cl_lease_time; |
| 502 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 503 | /* NB: LRU is sorted so that oldest is at the head */ |
| 504 | if (time_in_range(sp->so_expires, time_min, time_max)) |
| 505 | break; |
| 506 | list_move(&sp->so_lru, &doomed); |
| 507 | nfs4_remove_state_owner_locked(sp); |
| 508 | } |
| 509 | spin_unlock(&clp->cl_lock); |
| 510 | |
| 511 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 512 | list_del(&sp->so_lru); |
| 513 | nfs4_free_state_owner(sp); |
| 514 | } |
| 515 | } |
| 516 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 517 | /** |
| 518 | * nfs4_get_state_owner - Look up a state owner given a credential |
| 519 | * @server: nfs_server to search |
| 520 | * @cred: RPC credential to match |
| 521 | * |
| 522 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. |
| 523 | */ |
| 524 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 525 | struct rpc_cred *cred, |
| 526 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 528 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | struct nfs4_state_owner *sp, *new; |
| 530 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 532 | sp = nfs4_find_state_owner_locked(server, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | if (sp != NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 535 | goto out; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 536 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 537 | if (new == NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 538 | goto out; |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame^] | 539 | do { |
| 540 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) |
| 541 | break; |
| 542 | spin_lock(&clp->cl_lock); |
| 543 | sp = nfs4_insert_state_owner_locked(new); |
| 544 | spin_unlock(&clp->cl_lock); |
| 545 | } while (sp == ERR_PTR(-EAGAIN)); |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 546 | if (sp != new) |
| 547 | nfs4_free_state_owner(new); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 548 | out: |
| 549 | nfs4_gc_state_owners(server); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 550 | return sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | } |
| 552 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 553 | /** |
| 554 | * nfs4_put_state_owner - Release a nfs4_state_owner |
| 555 | * @sp: state owner data to release |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 556 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
| 558 | { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 559 | struct nfs_server *server = sp->so_server; |
| 560 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | |
| 562 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) |
| 563 | return; |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 564 | |
| 565 | if (!RB_EMPTY_NODE(&sp->so_server_node)) { |
| 566 | sp->so_expires = jiffies; |
| 567 | list_add_tail(&sp->so_lru, &server->state_owners_lru); |
| 568 | spin_unlock(&clp->cl_lock); |
| 569 | } else { |
| 570 | nfs4_remove_state_owner_locked(sp); |
| 571 | spin_unlock(&clp->cl_lock); |
| 572 | nfs4_free_state_owner(sp); |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | /** |
| 577 | * nfs4_purge_state_owners - Release all cached state owners |
| 578 | * @server: nfs_server with cached state owners to release |
| 579 | * |
| 580 | * Called at umount time. Remaining state owners will be on |
| 581 | * the LRU with ref count of zero. |
| 582 | */ |
| 583 | void nfs4_purge_state_owners(struct nfs_server *server) |
| 584 | { |
| 585 | struct nfs_client *clp = server->nfs_client; |
| 586 | struct nfs4_state_owner *sp, *tmp; |
| 587 | LIST_HEAD(doomed); |
| 588 | |
| 589 | spin_lock(&clp->cl_lock); |
| 590 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 591 | list_move(&sp->so_lru, &doomed); |
| 592 | nfs4_remove_state_owner_locked(sp); |
| 593 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 595 | |
| 596 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 597 | list_del(&sp->so_lru); |
| 598 | nfs4_free_state_owner(sp); |
| 599 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | static struct nfs4_state * |
| 603 | nfs4_alloc_open_state(void) |
| 604 | { |
| 605 | struct nfs4_state *state; |
| 606 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 607 | state = kzalloc(sizeof(*state), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | if (!state) |
| 609 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | atomic_set(&state->count, 1); |
| 611 | INIT_LIST_HEAD(&state->lock_states); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 612 | spin_lock_init(&state->state_lock); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 613 | seqlock_init(&state->seqlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | return state; |
| 615 | } |
| 616 | |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 617 | void |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 618 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 619 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 620 | if (state->state == fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 621 | return; |
| 622 | /* NB! List reordering - see the reclaim code for why. */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 623 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
| 624 | if (fmode & FMODE_WRITE) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 625 | list_move(&state->open_states, &state->owner->so_states); |
| 626 | else |
| 627 | list_move_tail(&state->open_states, &state->owner->so_states); |
| 628 | } |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 629 | state->state = fmode; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 630 | } |
| 631 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | static struct nfs4_state * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) |
| 634 | { |
| 635 | struct nfs_inode *nfsi = NFS_I(inode); |
| 636 | struct nfs4_state *state; |
| 637 | |
| 638 | list_for_each_entry(state, &nfsi->open_states, inode_states) { |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 639 | if (state->owner != owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | continue; |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 641 | if (atomic_inc_not_zero(&state->count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | return state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
| 644 | return NULL; |
| 645 | } |
| 646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | static void |
| 648 | nfs4_free_open_state(struct nfs4_state *state) |
| 649 | { |
| 650 | kfree(state); |
| 651 | } |
| 652 | |
| 653 | struct nfs4_state * |
| 654 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) |
| 655 | { |
| 656 | struct nfs4_state *state, *new; |
| 657 | struct nfs_inode *nfsi = NFS_I(inode); |
| 658 | |
| 659 | spin_lock(&inode->i_lock); |
| 660 | state = __nfs4_find_state_byowner(inode, owner); |
| 661 | spin_unlock(&inode->i_lock); |
| 662 | if (state) |
| 663 | goto out; |
| 664 | new = nfs4_alloc_open_state(); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 665 | spin_lock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | spin_lock(&inode->i_lock); |
| 667 | state = __nfs4_find_state_byowner(inode, owner); |
| 668 | if (state == NULL && new != NULL) { |
| 669 | state = new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | state->owner = owner; |
| 671 | atomic_inc(&owner->so_count); |
| 672 | list_add(&state->inode_states, &nfsi->open_states); |
Dave Chinner | 0444d76 | 2011-03-29 18:08:50 +1100 | [diff] [blame] | 673 | ihold(inode); |
| 674 | state->inode = inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 676 | /* Note: The reclaim code dictates that we add stateless |
| 677 | * and read-only stateids to the end of the list */ |
| 678 | list_add_tail(&state->open_states, &owner->so_states); |
| 679 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | } else { |
| 681 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 682 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | if (new) |
| 684 | nfs4_free_open_state(new); |
| 685 | } |
| 686 | out: |
| 687 | return state; |
| 688 | } |
| 689 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | void nfs4_put_open_state(struct nfs4_state *state) |
| 691 | { |
| 692 | struct inode *inode = state->inode; |
| 693 | struct nfs4_state_owner *owner = state->owner; |
| 694 | |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 695 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | return; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 697 | spin_lock(&inode->i_lock); |
Trond Myklebust | ba68303 | 2007-07-27 10:23:05 -0400 | [diff] [blame] | 698 | list_del(&state->inode_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | list_del(&state->open_states); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 700 | spin_unlock(&inode->i_lock); |
| 701 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | nfs4_free_open_state(state); |
| 704 | nfs4_put_state_owner(owner); |
| 705 | } |
| 706 | |
| 707 | /* |
Trond Myklebust | 83c9d41 | 2005-10-18 14:20:13 -0700 | [diff] [blame] | 708 | * Close the current file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | */ |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 710 | static void __nfs4_close(struct nfs4_state *state, |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 711 | fmode_t fmode, gfp_t gfp_mask, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | struct nfs4_state_owner *owner = state->owner; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 714 | int call_close = 0; |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 715 | fmode_t newstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
| 717 | atomic_inc(&owner->so_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | /* Protect against nfs4_find_state() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 719 | spin_lock(&owner->so_lock); |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 720 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 721 | case FMODE_READ: |
| 722 | state->n_rdonly--; |
| 723 | break; |
| 724 | case FMODE_WRITE: |
| 725 | state->n_wronly--; |
| 726 | break; |
| 727 | case FMODE_READ|FMODE_WRITE: |
| 728 | state->n_rdwr--; |
| 729 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 730 | newstate = FMODE_READ|FMODE_WRITE; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 731 | if (state->n_rdwr == 0) { |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 732 | if (state->n_rdonly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 733 | newstate &= ~FMODE_READ; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 734 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 735 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 736 | } |
| 737 | if (state->n_wronly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 738 | newstate &= ~FMODE_WRITE; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 739 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 740 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 741 | } |
| 742 | if (newstate == 0) |
| 743 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 744 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 745 | nfs4_state_set_mode_locked(state, newstate); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 746 | spin_unlock(&owner->so_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 747 | |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 748 | if (!call_close) { |
Trond Myklebust | b39e625 | 2007-06-11 23:05:07 -0400 | [diff] [blame] | 749 | nfs4_put_open_state(state); |
| 750 | nfs4_put_state_owner(owner); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 751 | } else { |
| 752 | bool roc = pnfs_roc(state->inode); |
| 753 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 754 | nfs4_do_close(state, gfp_mask, wait, roc); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 755 | } |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 756 | } |
| 757 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 758 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 759 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 760 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 761 | } |
| 762 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 763 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 764 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 765 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | /* |
| 769 | * Search the state->lock_states for an existing lock_owner |
| 770 | * that is compatible with current->files |
| 771 | */ |
| 772 | static struct nfs4_lock_state * |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 773 | __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] | 774 | { |
| 775 | struct nfs4_lock_state *pos; |
| 776 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 777 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | continue; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 779 | switch (pos->ls_owner.lo_type) { |
| 780 | case NFS4_POSIX_LOCK_TYPE: |
| 781 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) |
| 782 | continue; |
| 783 | break; |
| 784 | case NFS4_FLOCK_LOCK_TYPE: |
| 785 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) |
| 786 | continue; |
| 787 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | atomic_inc(&pos->ls_count); |
| 789 | return pos; |
| 790 | } |
| 791 | return NULL; |
| 792 | } |
| 793 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | /* |
| 795 | * Return a compatible lock_state. If no initialized lock_state structure |
| 796 | * exists, return an uninitialized one. |
| 797 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 799 | 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] | 800 | { |
| 801 | struct nfs4_lock_state *lsp; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 802 | struct nfs_server *server = state->owner->so_server; |
| 803 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 805 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | if (lsp == NULL) |
| 807 | return NULL; |
Trond Myklebust | d0dc370 | 2008-01-10 16:07:54 -0500 | [diff] [blame] | 808 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
| 809 | spin_lock_init(&lsp->ls_sequence.lock); |
| 810 | INIT_LIST_HEAD(&lsp->ls_sequence.list); |
| 811 | lsp->ls_seqid.sequence = &lsp->ls_sequence; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | atomic_set(&lsp->ls_count, 1); |
Trond Myklebust | b64aec8 | 2009-07-21 16:47:46 -0400 | [diff] [blame] | 813 | lsp->ls_state = state; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 814 | lsp->ls_owner.lo_type = type; |
| 815 | switch (lsp->ls_owner.lo_type) { |
| 816 | case NFS4_FLOCK_LOCK_TYPE: |
| 817 | lsp->ls_owner.lo_u.flock_owner = fl_pid; |
| 818 | break; |
| 819 | case NFS4_POSIX_LOCK_TYPE: |
| 820 | lsp->ls_owner.lo_u.posix_owner = fl_owner; |
| 821 | break; |
| 822 | default: |
| 823 | kfree(lsp); |
| 824 | return NULL; |
| 825 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 827 | nfs_alloc_unique_id_locked(&server->lockowner_id, &lsp->ls_id, 1, 64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 829 | INIT_LIST_HEAD(&lsp->ls_locks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | return lsp; |
| 831 | } |
| 832 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 833 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
| 834 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 835 | struct nfs_server *server = lsp->ls_state->owner->so_server; |
| 836 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 837 | |
| 838 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 839 | nfs_free_unique_id(&server->lockowner_id, &lsp->ls_id); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 840 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | f6a1cc8 | 2008-02-22 17:06:55 -0500 | [diff] [blame] | 841 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 842 | kfree(lsp); |
| 843 | } |
| 844 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | /* |
| 846 | * Return a compatible lock_state. If no initialized lock_state structure |
| 847 | * exists, return an uninitialized one. |
| 848 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 850 | 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] | 851 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 852 | struct nfs4_lock_state *lsp, *new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 854 | for(;;) { |
| 855 | spin_lock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 856 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 857 | if (lsp != NULL) |
| 858 | break; |
| 859 | if (new != NULL) { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 860 | list_add(&new->ls_locks, &state->lock_states); |
| 861 | set_bit(LK_STATE_IN_USE, &state->flags); |
| 862 | lsp = new; |
| 863 | new = NULL; |
| 864 | break; |
| 865 | } |
| 866 | spin_unlock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 867 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 868 | if (new == NULL) |
| 869 | return NULL; |
| 870 | } |
| 871 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 872 | if (new != NULL) |
| 873 | nfs4_free_lock_state(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | return lsp; |
| 875 | } |
| 876 | |
| 877 | /* |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 878 | * Release reference to lock_state, and free it if we see that |
| 879 | * it is no longer in use |
| 880 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 881 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 882 | { |
| 883 | struct nfs4_state *state; |
| 884 | |
| 885 | if (lsp == NULL) |
| 886 | return; |
| 887 | state = lsp->ls_state; |
| 888 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
| 889 | return; |
| 890 | list_del(&lsp->ls_locks); |
| 891 | if (list_empty(&state->lock_states)) |
| 892 | clear_bit(LK_STATE_IN_USE, &state->flags); |
| 893 | spin_unlock(&state->state_lock); |
Trond Myklebust | d3c7b7c | 2010-07-01 12:49:01 -0400 | [diff] [blame] | 894 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) |
| 895 | nfs4_release_lockowner(lsp); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 896 | nfs4_free_lock_state(lsp); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 897 | } |
| 898 | |
| 899 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
| 900 | { |
| 901 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
| 902 | |
| 903 | dst->fl_u.nfs4_fl.owner = lsp; |
| 904 | atomic_inc(&lsp->ls_count); |
| 905 | } |
| 906 | |
| 907 | static void nfs4_fl_release_lock(struct file_lock *fl) |
| 908 | { |
| 909 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
| 910 | } |
| 911 | |
Alexey Dobriyan | 6aed628 | 2009-09-21 17:01:11 -0700 | [diff] [blame] | 912 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 913 | .fl_copy_lock = nfs4_fl_copy_lock, |
| 914 | .fl_release_private = nfs4_fl_release_lock, |
| 915 | }; |
| 916 | |
| 917 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
| 918 | { |
| 919 | struct nfs4_lock_state *lsp; |
| 920 | |
| 921 | if (fl->fl_ops != NULL) |
| 922 | return 0; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 923 | if (fl->fl_flags & FL_POSIX) |
| 924 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); |
| 925 | else if (fl->fl_flags & FL_FLOCK) |
| 926 | lsp = nfs4_get_lock_state(state, 0, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE); |
| 927 | else |
| 928 | return -EINVAL; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 929 | if (lsp == NULL) |
| 930 | return -ENOMEM; |
| 931 | fl->fl_u.nfs4_fl.owner = lsp; |
| 932 | fl->fl_ops = &nfs4_fl_lock_ops; |
| 933 | return 0; |
| 934 | } |
| 935 | |
| 936 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | * Byte-range lock aware utility to initialize the stateid of read/write |
| 938 | * requests. |
| 939 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 940 | 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] | 941 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 942 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 943 | int seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 945 | do { |
| 946 | seq = read_seqbegin(&state->seqlock); |
| 947 | memcpy(dst, &state->stateid, sizeof(*dst)); |
| 948 | } while (read_seqretry(&state->seqlock, seq)); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 949 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
| 950 | return; |
| 951 | |
| 952 | spin_lock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 953 | 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] | 954 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
| 955 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); |
| 956 | spin_unlock(&state->state_lock); |
| 957 | nfs4_put_lock_state(lsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
| 959 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 960 | 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] | 961 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 962 | struct nfs_seqid *new; |
| 963 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 964 | new = kmalloc(sizeof(*new), gfp_mask); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 965 | if (new != NULL) { |
| 966 | new->sequence = counter; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 967 | INIT_LIST_HEAD(&new->list); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 968 | } |
| 969 | return new; |
| 970 | } |
| 971 | |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 972 | void nfs_release_seqid(struct nfs_seqid *seqid) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 973 | { |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 974 | if (!list_empty(&seqid->list)) { |
| 975 | struct rpc_sequence *sequence = seqid->sequence->sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 976 | |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 977 | spin_lock(&sequence->lock); |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 978 | list_del_init(&seqid->list); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 979 | spin_unlock(&sequence->lock); |
| 980 | rpc_wake_up(&sequence->wait); |
| 981 | } |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 982 | } |
| 983 | |
| 984 | void nfs_free_seqid(struct nfs_seqid *seqid) |
| 985 | { |
| 986 | nfs_release_seqid(seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 987 | kfree(seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | } |
| 989 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 991 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
| 992 | * failed with a seqid incrementing error - |
| 993 | * see comments nfs_fs.h:seqid_mutating_error() |
| 994 | */ |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 995 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | { |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 997 | 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] | 998 | switch (status) { |
| 999 | case 0: |
| 1000 | break; |
| 1001 | case -NFS4ERR_BAD_SEQID: |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 1002 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
| 1003 | return; |
| 1004 | printk(KERN_WARNING "NFS: v4 server returned a bad" |
Dan Muntz | 497799e | 2008-02-13 13:09:35 -0800 | [diff] [blame] | 1005 | " sequence-id error on an" |
| 1006 | " unconfirmed sequence %p!\n", |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 1007 | seqid->sequence); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1008 | case -NFS4ERR_STALE_CLIENTID: |
| 1009 | case -NFS4ERR_STALE_STATEID: |
| 1010 | case -NFS4ERR_BAD_STATEID: |
| 1011 | case -NFS4ERR_BADXDR: |
| 1012 | case -NFS4ERR_RESOURCE: |
| 1013 | case -NFS4ERR_NOFILEHANDLE: |
| 1014 | /* Non-seqid mutating errors */ |
| 1015 | return; |
| 1016 | }; |
| 1017 | /* |
| 1018 | * Note: no locking needed as we are guaranteed to be first |
| 1019 | * on the sequence list |
| 1020 | */ |
| 1021 | seqid->sequence->counter++; |
| 1022 | } |
| 1023 | |
| 1024 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) |
| 1025 | { |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1026 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
| 1027 | struct nfs4_state_owner, so_seqid); |
| 1028 | struct nfs_server *server = sp->so_server; |
| 1029 | |
| 1030 | if (status == -NFS4ERR_BAD_SEQID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | nfs4_drop_state_owner(sp); |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1032 | if (!nfs4_has_session(server->nfs_client)) |
| 1033 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1034 | } |
| 1035 | |
| 1036 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1037 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
| 1038 | * failed with a seqid incrementing error - |
| 1039 | * see comments nfs_fs.h:seqid_mutating_error() |
| 1040 | */ |
| 1041 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) |
| 1042 | { |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 1043 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1044 | } |
| 1045 | |
| 1046 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) |
| 1047 | { |
| 1048 | struct rpc_sequence *sequence = seqid->sequence->sequence; |
| 1049 | int status = 0; |
| 1050 | |
| 1051 | spin_lock(&sequence->lock); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1052 | if (list_empty(&seqid->list)) |
| 1053 | list_add_tail(&seqid->list, &sequence->list); |
| 1054 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) |
| 1055 | goto unlock; |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 1056 | rpc_sleep_on(&sequence->wait, task, NULL); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1057 | status = -EAGAIN; |
| 1058 | unlock: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1059 | spin_unlock(&sequence->lock); |
| 1060 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | } |
| 1062 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1063 | static int nfs4_run_state_manager(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1065 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1066 | { |
| 1067 | smp_mb__before_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1068 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1069 | smp_mb__after_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1070 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1071 | rpc_wake_up(&clp->cl_rpcwaitq); |
| 1072 | } |
| 1073 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | /* |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1075 | * Schedule the nfs_client asynchronous state management routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | */ |
Trond Myklebust | b0d3ded | 2008-12-23 15:21:50 -0500 | [diff] [blame] | 1077 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | { |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1079 | struct task_struct *task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1081 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1082 | return; |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1083 | __module_get(THIS_MODULE); |
| 1084 | atomic_inc(&clp->cl_count); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1085 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 1086 | rpc_peeraddr2str(clp->cl_rpcclient, |
| 1087 | RPC_DISPLAY_ADDR)); |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1088 | if (!IS_ERR(task)) |
| 1089 | return; |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1090 | nfs4_clear_state_manager_bit(clp); |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 1091 | nfs_put_client(clp); |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1092 | module_put(THIS_MODULE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | } |
| 1094 | |
| 1095 | /* |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1096 | * Schedule a lease recovery attempt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | */ |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1098 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | { |
| 1100 | if (!clp) |
| 1101 | return; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1102 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1103 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1104 | nfs4_schedule_state_manager(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | } |
| 1106 | |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1107 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
| 1108 | { |
| 1109 | nfs_handle_cb_pathdown(clp); |
| 1110 | nfs4_schedule_state_manager(clp); |
| 1111 | } |
| 1112 | |
Trond Myklebust | f9feab1 | 2011-03-09 16:12:46 -0500 | [diff] [blame] | 1113 | static 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] | 1114 | { |
| 1115 | |
| 1116 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1117 | /* Don't recover state that expired before the reboot */ |
| 1118 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { |
| 1119 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1120 | return 0; |
| 1121 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1122 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1123 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 1124 | return 1; |
| 1125 | } |
| 1126 | |
Trond Myklebust | f9feab1 | 2011-03-09 16:12:46 -0500 | [diff] [blame] | 1127 | static 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] | 1128 | { |
| 1129 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 1130 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1131 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1132 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
| 1133 | return 1; |
| 1134 | } |
| 1135 | |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1136 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
| 1137 | { |
| 1138 | struct nfs_client *clp = server->nfs_client; |
| 1139 | |
| 1140 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1141 | nfs4_schedule_state_manager(clp); |
| 1142 | } |
| 1143 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1144 | 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] | 1145 | { |
| 1146 | struct inode *inode = state->inode; |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1147 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | struct file_lock *fl; |
| 1149 | int status = 0; |
| 1150 | |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1151 | if (inode->i_flock == NULL) |
| 1152 | return 0; |
| 1153 | |
| 1154 | /* Guard against delegation returns and new lock/unlock calls */ |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1155 | down_write(&nfsi->rwsem); |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1156 | /* Protect inode->i_flock using the BKL */ |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1157 | lock_flocks(); |
Harvey Harrison | 90dc7d2 | 2008-02-20 13:03:05 -0800 | [diff] [blame] | 1158 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 1159 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | continue; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 1161 | if (nfs_file_open_context(fl->fl_file)->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | continue; |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1163 | unlock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | status = ops->recover_lock(state, fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | switch (status) { |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1166 | case 0: |
| 1167 | break; |
| 1168 | case -ESTALE: |
| 1169 | case -NFS4ERR_ADMIN_REVOKED: |
| 1170 | case -NFS4ERR_STALE_STATEID: |
| 1171 | case -NFS4ERR_BAD_STATEID: |
| 1172 | case -NFS4ERR_EXPIRED: |
| 1173 | case -NFS4ERR_NO_GRACE: |
| 1174 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1175 | case -NFS4ERR_BADSESSION: |
| 1176 | case -NFS4ERR_BADSLOT: |
| 1177 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1178 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1179 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | default: |
| 1181 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1182 | __func__, status); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1183 | case -ENOMEM: |
| 1184 | case -NFS4ERR_DENIED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | case -NFS4ERR_RECLAIM_BAD: |
| 1186 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 1187 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1188 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | } |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1190 | lock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | } |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1192 | unlock_flocks(); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1193 | out: |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1194 | up_write(&nfsi->rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | return status; |
| 1196 | } |
| 1197 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1198 | 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] | 1199 | { |
| 1200 | struct nfs4_state *state; |
| 1201 | struct nfs4_lock_state *lock; |
| 1202 | int status = 0; |
| 1203 | |
| 1204 | /* Note: we rely on the sp->so_states list being ordered |
| 1205 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) |
| 1206 | * states first. |
| 1207 | * This is needed to ensure that the server won't give us any |
| 1208 | * read delegations that we have to return if, say, we are |
| 1209 | * recovering after a network partition or a reboot from a |
| 1210 | * server that doesn't support a grace period. |
| 1211 | */ |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1212 | restart: |
| 1213 | spin_lock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1215 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
| 1216 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | if (state->state == 0) |
| 1218 | continue; |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1219 | atomic_inc(&state->count); |
| 1220 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | status = ops->recover_open(sp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | if (status >= 0) { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1223 | status = nfs4_reclaim_locks(state, ops); |
| 1224 | if (status >= 0) { |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1225 | spin_lock(&state->state_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1226 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
| 1227 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) |
| 1228 | printk("%s: Lock reclaim failed!\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1229 | __func__); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1230 | } |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1231 | spin_unlock(&state->state_lock); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1232 | nfs4_put_open_state(state); |
| 1233 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | } |
| 1236 | switch (status) { |
| 1237 | default: |
| 1238 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1239 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | case -ENOENT: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1241 | case -ENOMEM: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1242 | case -ESTALE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | /* |
| 1244 | * Open state on this file cannot be recovered |
| 1245 | * All we can do is revert to using the zero stateid. |
| 1246 | */ |
| 1247 | memset(state->stateid.data, 0, |
| 1248 | sizeof(state->stateid.data)); |
| 1249 | /* Mark the file as being 'closed' */ |
| 1250 | state->state = 0; |
| 1251 | break; |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1252 | case -EKEYEXPIRED: |
| 1253 | /* |
| 1254 | * User RPCSEC_GSS context has expired. |
| 1255 | * We cannot recover this stateid now, so |
| 1256 | * skip it and allow recovery thread to |
| 1257 | * proceed. |
| 1258 | */ |
| 1259 | break; |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1260 | case -NFS4ERR_ADMIN_REVOKED: |
| 1261 | case -NFS4ERR_STALE_STATEID: |
| 1262 | case -NFS4ERR_BAD_STATEID: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1263 | case -NFS4ERR_RECLAIM_BAD: |
| 1264 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1265 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1266 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | case -NFS4ERR_EXPIRED: |
| 1268 | case -NFS4ERR_NO_GRACE: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1269 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1271 | case -NFS4ERR_BADSESSION: |
| 1272 | case -NFS4ERR_BADSLOT: |
| 1273 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1274 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | goto out_err; |
| 1276 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1277 | nfs4_put_open_state(state); |
| 1278 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1280 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | return 0; |
| 1282 | out_err: |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1283 | nfs4_put_open_state(state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | return status; |
| 1285 | } |
| 1286 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1287 | static void nfs4_clear_open_state(struct nfs4_state *state) |
| 1288 | { |
| 1289 | struct nfs4_lock_state *lock; |
| 1290 | |
| 1291 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1292 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1293 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1294 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1295 | spin_lock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1296 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1297 | lock->ls_seqid.flags = 0; |
| 1298 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; |
| 1299 | } |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1300 | spin_unlock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1301 | } |
| 1302 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1303 | static void nfs4_reset_seqids(struct nfs_server *server, |
| 1304 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1305 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1306 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1307 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1308 | struct rb_node *pos; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1309 | struct nfs4_state *state; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1310 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1311 | spin_lock(&clp->cl_lock); |
| 1312 | for (pos = rb_first(&server->state_owners); |
| 1313 | pos != NULL; |
| 1314 | pos = rb_next(pos)) { |
| 1315 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1316 | sp->so_seqid.flags = 0; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1317 | spin_lock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1318 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1319 | if (mark_reclaim(clp, state)) |
| 1320 | nfs4_clear_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1321 | } |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1322 | spin_unlock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1323 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1324 | spin_unlock(&clp->cl_lock); |
| 1325 | } |
| 1326 | |
| 1327 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, |
| 1328 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
| 1329 | { |
| 1330 | struct nfs_server *server; |
| 1331 | |
| 1332 | rcu_read_lock(); |
| 1333 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1334 | nfs4_reset_seqids(server, mark_reclaim); |
| 1335 | rcu_read_unlock(); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1336 | } |
| 1337 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1338 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
| 1339 | { |
| 1340 | /* Mark all delegations for reclaim */ |
| 1341 | nfs_delegation_mark_reclaim(clp); |
| 1342 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); |
| 1343 | } |
| 1344 | |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1345 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
| 1346 | const struct nfs4_state_recovery_ops *ops) |
| 1347 | { |
| 1348 | /* Notify the server we're done reclaiming our state */ |
| 1349 | if (ops->reclaim_complete) |
| 1350 | (void)ops->reclaim_complete(clp); |
| 1351 | } |
| 1352 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1353 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1354 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1355 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1356 | struct nfs4_state_owner *sp; |
| 1357 | struct rb_node *pos; |
| 1358 | struct nfs4_state *state; |
| 1359 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1360 | spin_lock(&clp->cl_lock); |
| 1361 | for (pos = rb_first(&server->state_owners); |
| 1362 | pos != NULL; |
| 1363 | pos = rb_next(pos)) { |
| 1364 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1365 | spin_lock(&sp->so_lock); |
| 1366 | list_for_each_entry(state, &sp->so_states, open_states) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1367 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
| 1368 | &state->flags)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1369 | continue; |
| 1370 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1371 | } |
| 1372 | spin_unlock(&sp->so_lock); |
| 1373 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1374 | spin_unlock(&clp->cl_lock); |
| 1375 | } |
| 1376 | |
| 1377 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
| 1378 | { |
| 1379 | struct nfs_server *server; |
| 1380 | |
| 1381 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1382 | return 0; |
| 1383 | |
| 1384 | rcu_read_lock(); |
| 1385 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1386 | nfs4_clear_reclaim_server(server); |
| 1387 | rcu_read_unlock(); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1388 | |
| 1389 | nfs_delegation_reap_unclaimed(clp); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1390 | return 1; |
| 1391 | } |
| 1392 | |
| 1393 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
| 1394 | { |
| 1395 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
| 1396 | return; |
| 1397 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1398 | } |
| 1399 | |
| 1400 | static void nfs_delegation_clear_all(struct nfs_client *clp) |
| 1401 | { |
| 1402 | nfs_delegation_mark_reclaim(clp); |
| 1403 | nfs_delegation_reap_unclaimed(clp); |
| 1404 | } |
| 1405 | |
| 1406 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
| 1407 | { |
| 1408 | nfs_delegation_clear_all(clp); |
| 1409 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 1410 | } |
| 1411 | |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1412 | static void nfs4_warn_keyexpired(const char *s) |
| 1413 | { |
| 1414 | printk_ratelimited(KERN_WARNING "Error: state manager" |
| 1415 | " encountered RPCSEC_GSS session" |
| 1416 | " expired against NFSv4 server %s.\n", |
| 1417 | s); |
| 1418 | } |
| 1419 | |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1420 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1421 | { |
| 1422 | switch (error) { |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1423 | case 0: |
| 1424 | break; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1425 | case -NFS4ERR_CB_PATH_DOWN: |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1426 | nfs_handle_cb_pathdown(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1427 | break; |
Trond Myklebust | c8b7ae3d | 2009-12-03 15:53:21 -0500 | [diff] [blame] | 1428 | case -NFS4ERR_NO_GRACE: |
| 1429 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1430 | break; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1431 | case -NFS4ERR_STALE_CLIENTID: |
| 1432 | case -NFS4ERR_LEASE_MOVED: |
| 1433 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1434 | nfs4_state_clear_reclaim_reboot(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1435 | nfs4_state_start_reclaim_reboot(clp); |
| 1436 | break; |
| 1437 | case -NFS4ERR_EXPIRED: |
| 1438 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1439 | nfs4_state_start_reclaim_nograce(clp); |
Andy Adamson | 8ba9bf8 | 2009-12-04 15:55:34 -0500 | [diff] [blame] | 1440 | break; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1441 | case -NFS4ERR_BADSESSION: |
| 1442 | case -NFS4ERR_BADSLOT: |
| 1443 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1444 | case -NFS4ERR_DEADSESSION: |
| 1445 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1446 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 1447 | case -NFS4ERR_SEQ_MISORDERED: |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1448 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 0b9e2d4 | 2009-12-04 16:02:14 -0500 | [diff] [blame] | 1449 | /* Zero session reset errors */ |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1450 | break; |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1451 | case -EKEYEXPIRED: |
| 1452 | /* Nothing we can do */ |
| 1453 | nfs4_warn_keyexpired(clp->cl_hostname); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1454 | break; |
| 1455 | default: |
| 1456 | return error; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1457 | } |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1458 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1459 | } |
| 1460 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1461 | 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] | 1462 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1463 | struct nfs4_state_owner *sp; |
| 1464 | struct nfs_server *server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1465 | struct rb_node *pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | int status = 0; |
| 1467 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1468 | restart: |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1469 | rcu_read_lock(); |
| 1470 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 1471 | nfs4_purge_state_owners(server); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1472 | spin_lock(&clp->cl_lock); |
| 1473 | for (pos = rb_first(&server->state_owners); |
| 1474 | pos != NULL; |
| 1475 | pos = rb_next(pos)) { |
| 1476 | sp = rb_entry(pos, |
| 1477 | struct nfs4_state_owner, so_server_node); |
| 1478 | if (!test_and_clear_bit(ops->owner_flag_bit, |
| 1479 | &sp->so_flags)) |
| 1480 | continue; |
| 1481 | atomic_inc(&sp->so_count); |
| 1482 | spin_unlock(&clp->cl_lock); |
| 1483 | rcu_read_unlock(); |
| 1484 | |
| 1485 | status = nfs4_reclaim_open_state(sp, ops); |
| 1486 | if (status < 0) { |
| 1487 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
| 1488 | nfs4_put_state_owner(sp); |
| 1489 | return nfs4_recovery_handle_error(clp, status); |
| 1490 | } |
| 1491 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1492 | nfs4_put_state_owner(sp); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1493 | goto restart; |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1494 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1495 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1496 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1497 | rcu_read_unlock(); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1498 | return status; |
| 1499 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1501 | static int nfs4_check_lease(struct nfs_client *clp) |
| 1502 | { |
| 1503 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1504 | const struct nfs4_state_maintenance_ops *ops = |
| 1505 | clp->cl_mvops->state_renewal_ops; |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1506 | int status; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1507 | |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1508 | /* Is the client already known to have an expired lease? */ |
| 1509 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1510 | return 0; |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 1511 | spin_lock(&clp->cl_lock); |
| 1512 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1513 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1514 | if (cred == NULL) { |
| 1515 | cred = nfs4_get_setclientid_cred(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1516 | status = -ENOKEY; |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1517 | if (cred == NULL) |
| 1518 | goto out; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1519 | } |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1520 | status = ops->renew_lease(clp, cred); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1521 | put_rpccred(cred); |
| 1522 | out: |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1523 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1524 | } |
| 1525 | |
| 1526 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
| 1527 | { |
| 1528 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1529 | const struct nfs4_state_recovery_ops *ops = |
| 1530 | clp->cl_mvops->reboot_recovery_ops; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1531 | int status = -ENOENT; |
| 1532 | |
Andy Adamson | 90a1661 | 2009-04-01 09:22:48 -0400 | [diff] [blame] | 1533 | cred = ops->get_clid_cred(clp); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1534 | if (cred != NULL) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1535 | status = ops->establish_clid(clp, cred); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1536 | put_rpccred(cred); |
| 1537 | /* Handle case where the user hasn't set up machine creds */ |
| 1538 | if (status == -EACCES && cred == clp->cl_machine_cred) { |
| 1539 | nfs4_clear_machine_cred(clp); |
| 1540 | status = -EAGAIN; |
| 1541 | } |
Benny Halevy | c2e713d | 2009-04-01 09:21:51 -0400 | [diff] [blame] | 1542 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
| 1543 | status = -EPROTONOSUPPORT; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1544 | } |
| 1545 | return status; |
| 1546 | } |
| 1547 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1548 | #ifdef CONFIG_NFS_V4_1 |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1549 | void nfs4_schedule_session_recovery(struct nfs4_session *session) |
| 1550 | { |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 1551 | struct nfs_client *clp = session->clp; |
| 1552 | |
| 1553 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 1554 | nfs4_schedule_lease_recovery(clp); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1555 | } |
Andy Adamson | cbdabc7 | 2011-03-01 01:34:20 +0000 | [diff] [blame] | 1556 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1557 | |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1558 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
| 1559 | { |
| 1560 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1561 | nfs4_schedule_state_manager(clp); |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1562 | } |
| 1563 | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1564 | static void nfs4_reset_all_state(struct nfs_client *clp) |
| 1565 | { |
| 1566 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 1567 | clp->cl_boot_time = CURRENT_TIME; |
| 1568 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1569 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1570 | } |
| 1571 | } |
| 1572 | |
| 1573 | static void nfs41_handle_server_reboot(struct nfs_client *clp) |
| 1574 | { |
| 1575 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 1576 | nfs4_state_start_reclaim_reboot(clp); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1577 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1578 | } |
| 1579 | } |
| 1580 | |
| 1581 | static void nfs41_handle_state_revoked(struct nfs_client *clp) |
| 1582 | { |
| 1583 | /* Temporary */ |
| 1584 | nfs4_reset_all_state(clp); |
| 1585 | } |
| 1586 | |
| 1587 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
| 1588 | { |
| 1589 | /* This will need to handle layouts too */ |
| 1590 | nfs_expire_all_delegations(clp); |
| 1591 | } |
| 1592 | |
| 1593 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
| 1594 | { |
| 1595 | nfs_expire_all_delegations(clp); |
| 1596 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1597 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1598 | } |
| 1599 | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1600 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
| 1601 | { |
| 1602 | if (!flags) |
| 1603 | return; |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 1604 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1605 | nfs41_handle_server_reboot(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 1606 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1607 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
| 1608 | SEQ4_STATUS_ADMIN_STATE_REVOKED | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1609 | SEQ4_STATUS_LEASE_MOVED)) |
| 1610 | nfs41_handle_state_revoked(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 1611 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1612 | nfs41_handle_recallable_state_revoked(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 1613 | if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1614 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
| 1615 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1616 | nfs41_handle_cb_path_down(clp); |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1617 | } |
| 1618 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1619 | static int nfs4_reset_session(struct nfs_client *clp) |
| 1620 | { |
| 1621 | int status; |
| 1622 | |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 1623 | nfs4_begin_drain_session(clp); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1624 | status = nfs4_proc_destroy_session(clp->cl_session); |
| 1625 | if (status && status != -NFS4ERR_BADSESSION && |
| 1626 | status != -NFS4ERR_DEADSESSION) { |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 1627 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1628 | goto out; |
| 1629 | } |
| 1630 | |
| 1631 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
Trond Myklebust | f26468f | 2009-12-05 19:32:11 -0500 | [diff] [blame] | 1632 | status = nfs4_proc_create_session(clp); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1633 | if (status) { |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 1634 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1635 | goto out; |
| 1636 | } |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 1637 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1638 | /* create_session negotiated new slot table */ |
| 1639 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 1640 | |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1641 | /* Let the state manager reestablish state */ |
| 1642 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1643 | nfs41_setup_state_renewal(clp); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1644 | out: |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1645 | return status; |
| 1646 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1647 | |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1648 | static int nfs4_recall_slot(struct nfs_client *clp) |
| 1649 | { |
| 1650 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; |
| 1651 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; |
| 1652 | struct nfs4_slot *new, *old; |
| 1653 | int i; |
| 1654 | |
| 1655 | nfs4_begin_drain_session(clp); |
| 1656 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1657 | GFP_NOFS); |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1658 | if (!new) |
| 1659 | return -ENOMEM; |
| 1660 | |
| 1661 | spin_lock(&fc_tbl->slot_tbl_lock); |
| 1662 | for (i = 0; i < fc_tbl->target_max_slots; i++) |
| 1663 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; |
| 1664 | old = fc_tbl->slots; |
| 1665 | fc_tbl->slots = new; |
| 1666 | fc_tbl->max_slots = fc_tbl->target_max_slots; |
| 1667 | fc_tbl->target_max_slots = 0; |
| 1668 | fc_attrs->max_reqs = fc_tbl->max_slots; |
| 1669 | spin_unlock(&fc_tbl->slot_tbl_lock); |
| 1670 | |
| 1671 | kfree(old); |
| 1672 | nfs4_end_drain_session(clp); |
| 1673 | return 0; |
| 1674 | } |
| 1675 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1676 | #else /* CONFIG_NFS_V4_1 */ |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1677 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1678 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1679 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1680 | #endif /* CONFIG_NFS_V4_1 */ |
| 1681 | |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1682 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
| 1683 | * on EXCHANGE_ID for v4.1 |
| 1684 | */ |
| 1685 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) |
| 1686 | { |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 1687 | switch (status) { |
| 1688 | case -NFS4ERR_CLID_INUSE: |
| 1689 | case -NFS4ERR_STALE_CLIENTID: |
| 1690 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 1691 | break; |
| 1692 | case -NFS4ERR_DELAY: |
Trond Myklebust | 1bd714f | 2011-04-24 14:29:33 -0400 | [diff] [blame] | 1693 | case -ETIMEDOUT: |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 1694 | case -EAGAIN: |
| 1695 | ssleep(1); |
| 1696 | break; |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1697 | |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 1698 | case -EKEYEXPIRED: |
| 1699 | nfs4_warn_keyexpired(clp->cl_hostname); |
| 1700 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 1701 | * in nfs4_exchange_id */ |
| 1702 | default: |
| 1703 | return; |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1704 | } |
| 1705 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1706 | } |
| 1707 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1708 | static void nfs4_state_manager(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1709 | { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1710 | int status = 0; |
| 1711 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1712 | /* Ensure exclusive access to NFSv4 state */ |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 1713 | do { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1714 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
| 1715 | /* We're going to have to re-establish a clientid */ |
| 1716 | status = nfs4_reclaim_lease(clp); |
| 1717 | if (status) { |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1718 | nfs4_set_lease_expired(clp, status); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1719 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
| 1720 | &clp->cl_state)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1721 | continue; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1722 | if (clp->cl_cons_state == |
| 1723 | NFS_CS_SESSION_INITING) |
| 1724 | nfs_mark_client_ready(clp, status); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1725 | goto out_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | } |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1727 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Weston Andros Adamson | 78fe0f4 | 2011-05-31 19:05:47 -0400 | [diff] [blame] | 1728 | |
| 1729 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, |
| 1730 | &clp->cl_state)) |
| 1731 | nfs4_state_start_reclaim_nograce(clp); |
| 1732 | else |
| 1733 | set_bit(NFS4CLNT_RECLAIM_REBOOT, |
| 1734 | &clp->cl_state); |
| 1735 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1736 | pnfs_destroy_all_layouts(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1737 | } |
| 1738 | |
| 1739 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
| 1740 | status = nfs4_check_lease(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1741 | if (status < 0) |
| 1742 | goto out_error; |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1743 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1744 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1746 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1747 | /* Initialize or reset the session */ |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1748 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
Trond Myklebust | 7111dc7 | 2009-08-24 19:21:29 -0400 | [diff] [blame] | 1749 | && nfs4_has_session(clp)) { |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 1750 | status = nfs4_reset_session(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1751 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1752 | continue; |
| 1753 | if (status < 0) |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1754 | goto out_error; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1755 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1756 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1757 | /* First recover reboot state... */ |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 1758 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1759 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1760 | clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1761 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1762 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1763 | continue; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1764 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1765 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 1766 | continue; |
| 1767 | if (status < 0) |
| 1768 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1769 | } |
| 1770 | |
| 1771 | /* Now recover expired state... */ |
| 1772 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1773 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1774 | clp->cl_mvops->nograce_recovery_ops); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1775 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1776 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1777 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1778 | continue; |
| 1779 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1780 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1781 | } |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1782 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1783 | nfs4_end_drain_session(clp); |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1784 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
| 1785 | nfs_client_return_marked_delegations(clp); |
| 1786 | continue; |
| 1787 | } |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1788 | /* Recall session slots */ |
| 1789 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) |
| 1790 | && nfs4_has_session(clp)) { |
| 1791 | status = nfs4_recall_slot(clp); |
| 1792 | if (status < 0) |
| 1793 | goto out_error; |
| 1794 | continue; |
| 1795 | } |
| 1796 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1797 | |
| 1798 | nfs4_clear_state_manager_bit(clp); |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1799 | /* Did we race with an attempt to give us more work? */ |
| 1800 | if (clp->cl_state == 0) |
| 1801 | break; |
| 1802 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1803 | break; |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 1804 | } while (atomic_read(&clp->cl_count) > 1); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1805 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | out_error: |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1807 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 1808 | " with error %d\n", clp->cl_hostname, -status); |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1809 | nfs4_end_drain_session(clp); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1810 | nfs4_clear_state_manager_bit(clp); |
| 1811 | } |
| 1812 | |
| 1813 | static int nfs4_run_state_manager(void *ptr) |
| 1814 | { |
| 1815 | struct nfs_client *clp = ptr; |
| 1816 | |
| 1817 | allow_signal(SIGKILL); |
| 1818 | nfs4_state_manager(clp); |
| 1819 | nfs_put_client(clp); |
| 1820 | module_put_and_exit(0); |
| 1821 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | } |
| 1823 | |
| 1824 | /* |
| 1825 | * Local variables: |
| 1826 | * c-basic-offset: 8 |
| 1827 | * End: |
| 1828 | */ |