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; |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 193 | struct nfs4_slot_table *tbl; |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 194 | int max_slots; |
| 195 | |
Trond Myklebust | a2118c3 | 2010-06-16 09:52:26 -0400 | [diff] [blame] | 196 | if (ses == NULL) |
| 197 | return; |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 198 | tbl = &ses->fc_slot_table; |
Trond Myklebust | a2118c3 | 2010-06-16 09:52:26 -0400 | [diff] [blame] | 199 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 200 | spin_lock(&tbl->slot_tbl_lock); |
| 201 | max_slots = tbl->max_slots; |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 202 | while (max_slots--) { |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 203 | if (rpc_wake_up_first(&tbl->slot_tbl_waitq, |
| 204 | nfs4_set_task_privileged, |
| 205 | NULL) == NULL) |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 206 | break; |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 207 | } |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 208 | spin_unlock(&tbl->slot_tbl_lock); |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 209 | } |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 210 | } |
| 211 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 212 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 213 | { |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 214 | spin_lock(&tbl->slot_tbl_lock); |
Andy Adamson | b6bf6e7 | 2012-02-17 13:05:23 -0500 | [diff] [blame] | 215 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 216 | INIT_COMPLETION(tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 217 | spin_unlock(&tbl->slot_tbl_lock); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 218 | return wait_for_completion_interruptible(&tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 219 | } |
| 220 | spin_unlock(&tbl->slot_tbl_lock); |
| 221 | return 0; |
| 222 | } |
| 223 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 224 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
| 225 | { |
| 226 | struct nfs4_session *ses = clp->cl_session; |
| 227 | int ret = 0; |
| 228 | |
| 229 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); |
| 230 | /* back channel */ |
| 231 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); |
| 232 | if (ret) |
| 233 | return ret; |
| 234 | /* fore channel */ |
| 235 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); |
| 236 | } |
| 237 | |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 238 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
| 239 | { |
| 240 | int status; |
| 241 | |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 242 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
| 243 | goto do_confirm; |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 244 | nfs4_begin_drain_session(clp); |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 245 | status = nfs4_proc_exchange_id(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 246 | if (status != 0) |
| 247 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 248 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 249 | do_confirm: |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 250 | status = nfs4_proc_create_session(clp); |
| 251 | if (status != 0) |
| 252 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 253 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 254 | nfs41_setup_state_renewal(clp); |
| 255 | nfs_mark_client_ready(clp, NFS_CS_READY); |
| 256 | out: |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 257 | return status; |
| 258 | } |
| 259 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 260 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
| 261 | { |
| 262 | struct rpc_cred *cred; |
| 263 | |
| 264 | spin_lock(&clp->cl_lock); |
| 265 | cred = nfs4_get_machine_cred_locked(clp); |
| 266 | spin_unlock(&clp->cl_lock); |
| 267 | return cred; |
| 268 | } |
| 269 | |
| 270 | #endif /* CONFIG_NFS_V4_1 */ |
| 271 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 272 | static struct rpc_cred * |
| 273 | nfs4_get_setclientid_cred_server(struct nfs_server *server) |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 274 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 275 | struct nfs_client *clp = server->nfs_client; |
| 276 | struct rpc_cred *cred = NULL; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 277 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 278 | struct rb_node *pos; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 279 | |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 280 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 281 | pos = rb_first(&server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 282 | if (pos != NULL) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 283 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 284 | cred = get_rpccred(sp->so_cred); |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 285 | } |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 286 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 287 | return cred; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 288 | } |
| 289 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 290 | /** |
| 291 | * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation |
| 292 | * @clp: client state handle |
| 293 | * |
| 294 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 295 | */ |
| 296 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
| 297 | { |
| 298 | struct nfs_server *server; |
| 299 | struct rpc_cred *cred; |
| 300 | |
| 301 | spin_lock(&clp->cl_lock); |
| 302 | cred = nfs4_get_machine_cred_locked(clp); |
| 303 | spin_unlock(&clp->cl_lock); |
| 304 | if (cred != NULL) |
| 305 | goto out; |
| 306 | |
| 307 | rcu_read_lock(); |
| 308 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 309 | cred = nfs4_get_setclientid_cred_server(server); |
| 310 | if (cred != NULL) |
| 311 | break; |
| 312 | } |
| 313 | rcu_read_unlock(); |
| 314 | |
| 315 | out: |
| 316 | return cred; |
| 317 | } |
| 318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 320 | 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] | 321 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 322 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 323 | *parent = NULL; |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 324 | struct nfs4_state_owner *sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 326 | while (*p != NULL) { |
| 327 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 328 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 329 | |
| 330 | if (cred < sp->so_cred) |
| 331 | p = &parent->rb_left; |
| 332 | else if (cred > sp->so_cred) |
| 333 | p = &parent->rb_right; |
| 334 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 335 | if (!list_empty(&sp->so_lru)) |
| 336 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 337 | atomic_inc(&sp->so_count); |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 338 | return sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 339 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | } |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 341 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
| 343 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 344 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 345 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 346 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 347 | struct nfs_server *server = new->so_server; |
| 348 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 349 | *parent = NULL; |
| 350 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 351 | int err; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 352 | |
| 353 | while (*p != NULL) { |
| 354 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 355 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 356 | |
| 357 | if (new->so_cred < sp->so_cred) |
| 358 | p = &parent->rb_left; |
| 359 | else if (new->so_cred > sp->so_cred) |
| 360 | p = &parent->rb_right; |
| 361 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 362 | if (!list_empty(&sp->so_lru)) |
| 363 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 364 | atomic_inc(&sp->so_count); |
| 365 | return sp; |
| 366 | } |
| 367 | } |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 368 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 369 | if (err) |
| 370 | return ERR_PTR(err); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 371 | rb_link_node(&new->so_server_node, parent, p); |
| 372 | rb_insert_color(&new->so_server_node, &server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 373 | return new; |
| 374 | } |
| 375 | |
| 376 | static void |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 377 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 378 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 379 | struct nfs_server *server = sp->so_server; |
| 380 | |
| 381 | if (!RB_EMPTY_NODE(&sp->so_server_node)) |
| 382 | rb_erase(&sp->so_server_node, &server->state_owners); |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 383 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 384 | } |
| 385 | |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 386 | static void |
| 387 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) |
| 388 | { |
| 389 | sc->flags = 0; |
| 390 | sc->counter = 0; |
| 391 | spin_lock_init(&sc->lock); |
| 392 | INIT_LIST_HEAD(&sc->list); |
| 393 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); |
| 394 | } |
| 395 | |
| 396 | static void |
| 397 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) |
| 398 | { |
| 399 | rpc_destroy_wait_queue(&sc->wait); |
| 400 | } |
| 401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | /* |
| 403 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to |
| 404 | * create a new state_owner. |
| 405 | * |
| 406 | */ |
| 407 | static struct nfs4_state_owner * |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 408 | nfs4_alloc_state_owner(struct nfs_server *server, |
| 409 | struct rpc_cred *cred, |
| 410 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | { |
| 412 | struct nfs4_state_owner *sp; |
| 413 | |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 414 | sp = kzalloc(sizeof(*sp), gfp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | if (!sp) |
| 416 | return NULL; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 417 | sp->so_server = server; |
| 418 | sp->so_cred = get_rpccred(cred); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 419 | spin_lock_init(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | INIT_LIST_HEAD(&sp->so_states); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 421 | nfs4_init_seqid_counter(&sp->so_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | atomic_set(&sp->so_count, 1); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 423 | INIT_LIST_HEAD(&sp->so_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | return sp; |
| 425 | } |
| 426 | |
Adrian Bunk | 1d2e88e | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 427 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
| 429 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 430 | if (!RB_EMPTY_NODE(&sp->so_server_node)) { |
| 431 | struct nfs_server *server = sp->so_server; |
| 432 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 433 | |
| 434 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 435 | rb_erase(&sp->so_server_node, &server->state_owners); |
| 436 | RB_CLEAR_NODE(&sp->so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 437 | spin_unlock(&clp->cl_lock); |
| 438 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | } |
| 440 | |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 441 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
| 442 | { |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 443 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 444 | put_rpccred(sp->so_cred); |
| 445 | kfree(sp); |
| 446 | } |
| 447 | |
| 448 | static void nfs4_gc_state_owners(struct nfs_server *server) |
| 449 | { |
| 450 | struct nfs_client *clp = server->nfs_client; |
| 451 | struct nfs4_state_owner *sp, *tmp; |
| 452 | unsigned long time_min, time_max; |
| 453 | LIST_HEAD(doomed); |
| 454 | |
| 455 | spin_lock(&clp->cl_lock); |
| 456 | time_max = jiffies; |
| 457 | time_min = (long)time_max - (long)clp->cl_lease_time; |
| 458 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 459 | /* NB: LRU is sorted so that oldest is at the head */ |
| 460 | if (time_in_range(sp->so_expires, time_min, time_max)) |
| 461 | break; |
| 462 | list_move(&sp->so_lru, &doomed); |
| 463 | nfs4_remove_state_owner_locked(sp); |
| 464 | } |
| 465 | spin_unlock(&clp->cl_lock); |
| 466 | |
| 467 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 468 | list_del(&sp->so_lru); |
| 469 | nfs4_free_state_owner(sp); |
| 470 | } |
| 471 | } |
| 472 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 473 | /** |
| 474 | * nfs4_get_state_owner - Look up a state owner given a credential |
| 475 | * @server: nfs_server to search |
| 476 | * @cred: RPC credential to match |
| 477 | * |
| 478 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. |
| 479 | */ |
| 480 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 481 | struct rpc_cred *cred, |
| 482 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 484 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | struct nfs4_state_owner *sp, *new; |
| 486 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 488 | sp = nfs4_find_state_owner_locked(server, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | if (sp != NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 491 | goto out; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 492 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 493 | if (new == NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 494 | goto out; |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 495 | do { |
| 496 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) |
| 497 | break; |
| 498 | spin_lock(&clp->cl_lock); |
| 499 | sp = nfs4_insert_state_owner_locked(new); |
| 500 | spin_unlock(&clp->cl_lock); |
| 501 | } while (sp == ERR_PTR(-EAGAIN)); |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 502 | if (sp != new) |
| 503 | nfs4_free_state_owner(new); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 504 | out: |
| 505 | nfs4_gc_state_owners(server); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 506 | return sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | } |
| 508 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 509 | /** |
| 510 | * nfs4_put_state_owner - Release a nfs4_state_owner |
| 511 | * @sp: state owner data to release |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 512 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
| 514 | { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 515 | struct nfs_server *server = sp->so_server; |
| 516 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) |
| 519 | return; |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 520 | |
| 521 | if (!RB_EMPTY_NODE(&sp->so_server_node)) { |
| 522 | sp->so_expires = jiffies; |
| 523 | list_add_tail(&sp->so_lru, &server->state_owners_lru); |
| 524 | spin_unlock(&clp->cl_lock); |
| 525 | } else { |
| 526 | nfs4_remove_state_owner_locked(sp); |
| 527 | spin_unlock(&clp->cl_lock); |
| 528 | nfs4_free_state_owner(sp); |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | /** |
| 533 | * nfs4_purge_state_owners - Release all cached state owners |
| 534 | * @server: nfs_server with cached state owners to release |
| 535 | * |
| 536 | * Called at umount time. Remaining state owners will be on |
| 537 | * the LRU with ref count of zero. |
| 538 | */ |
| 539 | void nfs4_purge_state_owners(struct nfs_server *server) |
| 540 | { |
| 541 | struct nfs_client *clp = server->nfs_client; |
| 542 | struct nfs4_state_owner *sp, *tmp; |
| 543 | LIST_HEAD(doomed); |
| 544 | |
| 545 | spin_lock(&clp->cl_lock); |
| 546 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 547 | list_move(&sp->so_lru, &doomed); |
| 548 | nfs4_remove_state_owner_locked(sp); |
| 549 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 551 | |
| 552 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 553 | list_del(&sp->so_lru); |
| 554 | nfs4_free_state_owner(sp); |
| 555 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | static struct nfs4_state * |
| 559 | nfs4_alloc_open_state(void) |
| 560 | { |
| 561 | struct nfs4_state *state; |
| 562 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 563 | state = kzalloc(sizeof(*state), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | if (!state) |
| 565 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | atomic_set(&state->count, 1); |
| 567 | INIT_LIST_HEAD(&state->lock_states); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 568 | spin_lock_init(&state->state_lock); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 569 | seqlock_init(&state->seqlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | return state; |
| 571 | } |
| 572 | |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 573 | void |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 574 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 575 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 576 | if (state->state == fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 577 | return; |
| 578 | /* NB! List reordering - see the reclaim code for why. */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 579 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
| 580 | if (fmode & FMODE_WRITE) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 581 | list_move(&state->open_states, &state->owner->so_states); |
| 582 | else |
| 583 | list_move_tail(&state->open_states, &state->owner->so_states); |
| 584 | } |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 585 | state->state = fmode; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 586 | } |
| 587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | static struct nfs4_state * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) |
| 590 | { |
| 591 | struct nfs_inode *nfsi = NFS_I(inode); |
| 592 | struct nfs4_state *state; |
| 593 | |
| 594 | list_for_each_entry(state, &nfsi->open_states, inode_states) { |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 595 | if (state->owner != owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | continue; |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 597 | if (atomic_inc_not_zero(&state->count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | return state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
| 600 | return NULL; |
| 601 | } |
| 602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | static void |
| 604 | nfs4_free_open_state(struct nfs4_state *state) |
| 605 | { |
| 606 | kfree(state); |
| 607 | } |
| 608 | |
| 609 | struct nfs4_state * |
| 610 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) |
| 611 | { |
| 612 | struct nfs4_state *state, *new; |
| 613 | struct nfs_inode *nfsi = NFS_I(inode); |
| 614 | |
| 615 | spin_lock(&inode->i_lock); |
| 616 | state = __nfs4_find_state_byowner(inode, owner); |
| 617 | spin_unlock(&inode->i_lock); |
| 618 | if (state) |
| 619 | goto out; |
| 620 | new = nfs4_alloc_open_state(); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 621 | spin_lock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | spin_lock(&inode->i_lock); |
| 623 | state = __nfs4_find_state_byowner(inode, owner); |
| 624 | if (state == NULL && new != NULL) { |
| 625 | state = new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | state->owner = owner; |
| 627 | atomic_inc(&owner->so_count); |
| 628 | list_add(&state->inode_states, &nfsi->open_states); |
Dave Chinner | 0444d76 | 2011-03-29 18:08:50 +1100 | [diff] [blame] | 629 | ihold(inode); |
| 630 | state->inode = inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 632 | /* Note: The reclaim code dictates that we add stateless |
| 633 | * and read-only stateids to the end of the list */ |
| 634 | list_add_tail(&state->open_states, &owner->so_states); |
| 635 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | } else { |
| 637 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 638 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | if (new) |
| 640 | nfs4_free_open_state(new); |
| 641 | } |
| 642 | out: |
| 643 | return state; |
| 644 | } |
| 645 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | void nfs4_put_open_state(struct nfs4_state *state) |
| 647 | { |
| 648 | struct inode *inode = state->inode; |
| 649 | struct nfs4_state_owner *owner = state->owner; |
| 650 | |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 651 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | return; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 653 | spin_lock(&inode->i_lock); |
Trond Myklebust | ba68303 | 2007-07-27 10:23:05 -0400 | [diff] [blame] | 654 | list_del(&state->inode_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | list_del(&state->open_states); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 656 | spin_unlock(&inode->i_lock); |
| 657 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | nfs4_free_open_state(state); |
| 660 | nfs4_put_state_owner(owner); |
| 661 | } |
| 662 | |
| 663 | /* |
Trond Myklebust | 83c9d41 | 2005-10-18 14:20:13 -0700 | [diff] [blame] | 664 | * Close the current file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | */ |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 666 | static void __nfs4_close(struct nfs4_state *state, |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 667 | fmode_t fmode, gfp_t gfp_mask, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | struct nfs4_state_owner *owner = state->owner; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 670 | int call_close = 0; |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 671 | fmode_t newstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
| 673 | atomic_inc(&owner->so_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | /* Protect against nfs4_find_state() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 675 | spin_lock(&owner->so_lock); |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 676 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 677 | case FMODE_READ: |
| 678 | state->n_rdonly--; |
| 679 | break; |
| 680 | case FMODE_WRITE: |
| 681 | state->n_wronly--; |
| 682 | break; |
| 683 | case FMODE_READ|FMODE_WRITE: |
| 684 | state->n_rdwr--; |
| 685 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 686 | newstate = FMODE_READ|FMODE_WRITE; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 687 | if (state->n_rdwr == 0) { |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 688 | if (state->n_rdonly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 689 | newstate &= ~FMODE_READ; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 690 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 691 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 692 | } |
| 693 | if (state->n_wronly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 694 | newstate &= ~FMODE_WRITE; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 695 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 696 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 697 | } |
| 698 | if (newstate == 0) |
| 699 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 700 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 701 | nfs4_state_set_mode_locked(state, newstate); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 702 | spin_unlock(&owner->so_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 703 | |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 704 | if (!call_close) { |
Trond Myklebust | b39e625 | 2007-06-11 23:05:07 -0400 | [diff] [blame] | 705 | nfs4_put_open_state(state); |
| 706 | nfs4_put_state_owner(owner); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 707 | } else { |
| 708 | bool roc = pnfs_roc(state->inode); |
| 709 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 710 | nfs4_do_close(state, gfp_mask, wait, roc); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 711 | } |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 712 | } |
| 713 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 714 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 715 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 716 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 717 | } |
| 718 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 719 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 720 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 721 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | } |
| 723 | |
| 724 | /* |
| 725 | * Search the state->lock_states for an existing lock_owner |
| 726 | * that is compatible with current->files |
| 727 | */ |
| 728 | static struct nfs4_lock_state * |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 729 | __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] | 730 | { |
| 731 | struct nfs4_lock_state *pos; |
| 732 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 733 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | continue; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 735 | switch (pos->ls_owner.lo_type) { |
| 736 | case NFS4_POSIX_LOCK_TYPE: |
| 737 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) |
| 738 | continue; |
| 739 | break; |
| 740 | case NFS4_FLOCK_LOCK_TYPE: |
| 741 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) |
| 742 | continue; |
| 743 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | atomic_inc(&pos->ls_count); |
| 745 | return pos; |
| 746 | } |
| 747 | return NULL; |
| 748 | } |
| 749 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | /* |
| 751 | * Return a compatible lock_state. If no initialized lock_state structure |
| 752 | * exists, return an uninitialized one. |
| 753 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 755 | 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] | 756 | { |
| 757 | struct nfs4_lock_state *lsp; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 758 | struct nfs_server *server = state->owner->so_server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 760 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | if (lsp == NULL) |
| 762 | return NULL; |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 763 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | atomic_set(&lsp->ls_count, 1); |
Trond Myklebust | b64aec8 | 2009-07-21 16:47:46 -0400 | [diff] [blame] | 765 | lsp->ls_state = state; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 766 | lsp->ls_owner.lo_type = type; |
| 767 | switch (lsp->ls_owner.lo_type) { |
| 768 | case NFS4_FLOCK_LOCK_TYPE: |
| 769 | lsp->ls_owner.lo_u.flock_owner = fl_pid; |
| 770 | break; |
| 771 | case NFS4_POSIX_LOCK_TYPE: |
| 772 | lsp->ls_owner.lo_u.posix_owner = fl_owner; |
| 773 | break; |
| 774 | default: |
Trond Myklebust | d2d7ce2 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 775 | goto out_free; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 776 | } |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 777 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
| 778 | if (lsp->ls_seqid.owner_id < 0) |
Trond Myklebust | d2d7ce2 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 779 | goto out_free; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 780 | INIT_LIST_HEAD(&lsp->ls_locks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | return lsp; |
Trond Myklebust | d2d7ce2 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 782 | out_free: |
| 783 | kfree(lsp); |
| 784 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | } |
| 786 | |
Trond Myklebust | cf470c3 | 2012-03-07 13:49:12 -0500 | [diff] [blame] | 787 | void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 788 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 789 | struct nfs_server *server = lsp->ls_state->owner->so_server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 790 | |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 791 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 792 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 793 | kfree(lsp); |
| 794 | } |
| 795 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | /* |
| 797 | * Return a compatible lock_state. If no initialized lock_state structure |
| 798 | * exists, return an uninitialized one. |
| 799 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 801 | 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] | 802 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 803 | struct nfs4_lock_state *lsp, *new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 805 | for(;;) { |
| 806 | spin_lock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 807 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 808 | if (lsp != NULL) |
| 809 | break; |
| 810 | if (new != NULL) { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 811 | list_add(&new->ls_locks, &state->lock_states); |
| 812 | set_bit(LK_STATE_IN_USE, &state->flags); |
| 813 | lsp = new; |
| 814 | new = NULL; |
| 815 | break; |
| 816 | } |
| 817 | spin_unlock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 818 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 819 | if (new == NULL) |
| 820 | return NULL; |
| 821 | } |
| 822 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 823 | if (new != NULL) |
| 824 | nfs4_free_lock_state(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | return lsp; |
| 826 | } |
| 827 | |
| 828 | /* |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 829 | * Release reference to lock_state, and free it if we see that |
| 830 | * it is no longer in use |
| 831 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 832 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 833 | { |
| 834 | struct nfs4_state *state; |
| 835 | |
| 836 | if (lsp == NULL) |
| 837 | return; |
| 838 | state = lsp->ls_state; |
| 839 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
| 840 | return; |
| 841 | list_del(&lsp->ls_locks); |
| 842 | if (list_empty(&state->lock_states)) |
| 843 | clear_bit(LK_STATE_IN_USE, &state->flags); |
| 844 | spin_unlock(&state->state_lock); |
Trond Myklebust | cf470c3 | 2012-03-07 13:49:12 -0500 | [diff] [blame] | 845 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) { |
| 846 | if (nfs4_release_lockowner(lsp) == 0) |
| 847 | return; |
| 848 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 849 | nfs4_free_lock_state(lsp); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 850 | } |
| 851 | |
| 852 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
| 853 | { |
| 854 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
| 855 | |
| 856 | dst->fl_u.nfs4_fl.owner = lsp; |
| 857 | atomic_inc(&lsp->ls_count); |
| 858 | } |
| 859 | |
| 860 | static void nfs4_fl_release_lock(struct file_lock *fl) |
| 861 | { |
| 862 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
| 863 | } |
| 864 | |
Alexey Dobriyan | 6aed628 | 2009-09-21 17:01:11 -0700 | [diff] [blame] | 865 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 866 | .fl_copy_lock = nfs4_fl_copy_lock, |
| 867 | .fl_release_private = nfs4_fl_release_lock, |
| 868 | }; |
| 869 | |
| 870 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
| 871 | { |
| 872 | struct nfs4_lock_state *lsp; |
| 873 | |
| 874 | if (fl->fl_ops != NULL) |
| 875 | return 0; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 876 | if (fl->fl_flags & FL_POSIX) |
| 877 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); |
| 878 | else if (fl->fl_flags & FL_FLOCK) |
Trond Myklebust | 1728017 | 2012-03-11 13:11:00 -0400 | [diff] [blame] | 879 | lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, |
| 880 | NFS4_FLOCK_LOCK_TYPE); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 881 | else |
| 882 | return -EINVAL; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 883 | if (lsp == NULL) |
| 884 | return -ENOMEM; |
| 885 | fl->fl_u.nfs4_fl.owner = lsp; |
| 886 | fl->fl_ops = &nfs4_fl_lock_ops; |
| 887 | return 0; |
| 888 | } |
| 889 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 890 | static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
| 891 | fl_owner_t fl_owner, pid_t fl_pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 893 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 894 | bool ret = false; |
| 895 | |
| 896 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
| 897 | goto out; |
| 898 | |
| 899 | spin_lock(&state->state_lock); |
| 900 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
| 901 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) { |
| 902 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
| 903 | ret = true; |
| 904 | } |
| 905 | spin_unlock(&state->state_lock); |
| 906 | nfs4_put_lock_state(lsp); |
| 907 | out: |
| 908 | return ret; |
| 909 | } |
| 910 | |
| 911 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
| 912 | { |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 913 | int seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 915 | do { |
| 916 | seq = read_seqbegin(&state->seqlock); |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 917 | nfs4_stateid_copy(dst, &state->stateid); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 918 | } while (read_seqretry(&state->seqlock, seq)); |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 919 | } |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 920 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 921 | /* |
| 922 | * Byte-range lock aware utility to initialize the stateid of read/write |
| 923 | * requests. |
| 924 | */ |
| 925 | void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
| 926 | fmode_t fmode, fl_owner_t fl_owner, pid_t fl_pid) |
| 927 | { |
| 928 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) |
| 929 | return; |
| 930 | if (nfs4_copy_lock_stateid(dst, state, fl_owner, fl_pid)) |
| 931 | return; |
| 932 | nfs4_copy_open_stateid(dst, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | } |
| 934 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 935 | 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] | 936 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 937 | struct nfs_seqid *new; |
| 938 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 939 | new = kmalloc(sizeof(*new), gfp_mask); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 940 | if (new != NULL) { |
| 941 | new->sequence = counter; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 942 | INIT_LIST_HEAD(&new->list); |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 943 | new->task = NULL; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 944 | } |
| 945 | return new; |
| 946 | } |
| 947 | |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 948 | void nfs_release_seqid(struct nfs_seqid *seqid) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 949 | { |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 950 | struct nfs_seqid_counter *sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 951 | |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 952 | if (list_empty(&seqid->list)) |
| 953 | return; |
| 954 | sequence = seqid->sequence; |
| 955 | spin_lock(&sequence->lock); |
| 956 | list_del_init(&seqid->list); |
| 957 | if (!list_empty(&sequence->list)) { |
| 958 | struct nfs_seqid *next; |
| 959 | |
| 960 | next = list_first_entry(&sequence->list, |
| 961 | struct nfs_seqid, list); |
| 962 | rpc_wake_up_queued_task(&sequence->wait, next->task); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 963 | } |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 964 | spin_unlock(&sequence->lock); |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 965 | } |
| 966 | |
| 967 | void nfs_free_seqid(struct nfs_seqid *seqid) |
| 968 | { |
| 969 | nfs_release_seqid(seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 970 | kfree(seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | } |
| 972 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 974 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
| 975 | * failed with a seqid incrementing error - |
| 976 | * see comments nfs_fs.h:seqid_mutating_error() |
| 977 | */ |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 978 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | { |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 980 | BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 981 | switch (status) { |
| 982 | case 0: |
| 983 | break; |
| 984 | case -NFS4ERR_BAD_SEQID: |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 985 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
| 986 | return; |
Trond Myklebust | 9a3ba43 | 2012-03-12 18:01:48 -0400 | [diff] [blame] | 987 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
Dan Muntz | 497799e | 2008-02-13 13:09:35 -0800 | [diff] [blame] | 988 | " sequence-id error on an" |
| 989 | " unconfirmed sequence %p!\n", |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 990 | seqid->sequence); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 991 | case -NFS4ERR_STALE_CLIENTID: |
| 992 | case -NFS4ERR_STALE_STATEID: |
| 993 | case -NFS4ERR_BAD_STATEID: |
| 994 | case -NFS4ERR_BADXDR: |
| 995 | case -NFS4ERR_RESOURCE: |
| 996 | case -NFS4ERR_NOFILEHANDLE: |
| 997 | /* Non-seqid mutating errors */ |
| 998 | return; |
| 999 | }; |
| 1000 | /* |
| 1001 | * Note: no locking needed as we are guaranteed to be first |
| 1002 | * on the sequence list |
| 1003 | */ |
| 1004 | seqid->sequence->counter++; |
| 1005 | } |
| 1006 | |
| 1007 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) |
| 1008 | { |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1009 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
| 1010 | struct nfs4_state_owner, so_seqid); |
| 1011 | struct nfs_server *server = sp->so_server; |
| 1012 | |
| 1013 | if (status == -NFS4ERR_BAD_SEQID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | nfs4_drop_state_owner(sp); |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1015 | if (!nfs4_has_session(server->nfs_client)) |
| 1016 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1017 | } |
| 1018 | |
| 1019 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1020 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
| 1021 | * failed with a seqid incrementing error - |
| 1022 | * see comments nfs_fs.h:seqid_mutating_error() |
| 1023 | */ |
| 1024 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) |
| 1025 | { |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 1026 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) |
| 1030 | { |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 1031 | struct nfs_seqid_counter *sequence = seqid->sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1032 | int status = 0; |
| 1033 | |
| 1034 | spin_lock(&sequence->lock); |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1035 | seqid->task = task; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1036 | if (list_empty(&seqid->list)) |
| 1037 | list_add_tail(&seqid->list, &sequence->list); |
| 1038 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) |
| 1039 | goto unlock; |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 1040 | rpc_sleep_on(&sequence->wait, task, NULL); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1041 | status = -EAGAIN; |
| 1042 | unlock: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1043 | spin_unlock(&sequence->lock); |
| 1044 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | } |
| 1046 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1047 | static int nfs4_run_state_manager(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1049 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1050 | { |
| 1051 | smp_mb__before_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1052 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1053 | smp_mb__after_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1054 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1055 | rpc_wake_up(&clp->cl_rpcwaitq); |
| 1056 | } |
| 1057 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | /* |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1059 | * Schedule the nfs_client asynchronous state management routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | */ |
Trond Myklebust | b0d3ded | 2008-12-23 15:21:50 -0500 | [diff] [blame] | 1061 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | { |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1063 | struct task_struct *task; |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1064 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1066 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1067 | return; |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1068 | __module_get(THIS_MODULE); |
| 1069 | atomic_inc(&clp->cl_count); |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1070 | |
| 1071 | /* The rcu_read_lock() is not strictly necessary, as the state |
| 1072 | * manager is the only thread that ever changes the rpc_xprt |
| 1073 | * after it's initialized. At this point, we're single threaded. */ |
| 1074 | rcu_read_lock(); |
| 1075 | snprintf(buf, sizeof(buf), "%s-manager", |
| 1076 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
| 1077 | rcu_read_unlock(); |
| 1078 | task = kthread_run(nfs4_run_state_manager, clp, buf); |
| 1079 | if (IS_ERR(task)) { |
| 1080 | printk(KERN_ERR "%s: kthread_run: %ld\n", |
| 1081 | __func__, PTR_ERR(task)); |
| 1082 | nfs4_clear_state_manager_bit(clp); |
| 1083 | nfs_put_client(clp); |
| 1084 | module_put(THIS_MODULE); |
| 1085 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | } |
| 1087 | |
| 1088 | /* |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1089 | * Schedule a lease recovery attempt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | */ |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1091 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | { |
| 1093 | if (!clp) |
| 1094 | return; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1095 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1096 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1097 | nfs4_schedule_state_manager(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | } |
Andy Adamson | 9cb8196 | 2012-03-07 10:49:41 -0500 | [diff] [blame] | 1099 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1101 | /* |
| 1102 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN |
| 1103 | * @clp: client to process |
| 1104 | * |
| 1105 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a |
| 1106 | * resend of the SETCLIENTID and hence re-establish the |
| 1107 | * callback channel. Then return all existing delegations. |
| 1108 | */ |
| 1109 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) |
| 1110 | { |
| 1111 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1112 | nfs_expire_all_delegations(clp); |
| 1113 | } |
| 1114 | |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1115 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
| 1116 | { |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1117 | nfs40_handle_cb_pathdown(clp); |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1118 | nfs4_schedule_state_manager(clp); |
| 1119 | } |
| 1120 | |
Trond Myklebust | f9feab1 | 2011-03-09 16:12:46 -0500 | [diff] [blame] | 1121 | 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] | 1122 | { |
| 1123 | |
| 1124 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1125 | /* Don't recover state that expired before the reboot */ |
| 1126 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { |
| 1127 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1128 | return 0; |
| 1129 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1130 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1131 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 1132 | return 1; |
| 1133 | } |
| 1134 | |
Trond Myklebust | f9feab1 | 2011-03-09 16:12:46 -0500 | [diff] [blame] | 1135 | 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] | 1136 | { |
| 1137 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 1138 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1139 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1140 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
| 1141 | return 1; |
| 1142 | } |
| 1143 | |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1144 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
| 1145 | { |
| 1146 | struct nfs_client *clp = server->nfs_client; |
| 1147 | |
| 1148 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1149 | nfs4_schedule_state_manager(clp); |
| 1150 | } |
Andy Adamson | 9cb8196 | 2012-03-07 10:49:41 -0500 | [diff] [blame] | 1151 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1152 | |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1153 | void nfs_inode_find_state_and_recover(struct inode *inode, |
| 1154 | const nfs4_stateid *stateid) |
| 1155 | { |
| 1156 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; |
| 1157 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1158 | struct nfs_open_context *ctx; |
| 1159 | struct nfs4_state *state; |
| 1160 | bool found = false; |
| 1161 | |
| 1162 | spin_lock(&inode->i_lock); |
| 1163 | list_for_each_entry(ctx, &nfsi->open_files, list) { |
| 1164 | state = ctx->state; |
| 1165 | if (state == NULL) |
| 1166 | continue; |
| 1167 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| 1168 | continue; |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 1169 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1170 | continue; |
| 1171 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1172 | found = true; |
| 1173 | } |
| 1174 | spin_unlock(&inode->i_lock); |
| 1175 | if (found) |
| 1176 | nfs4_schedule_state_manager(clp); |
| 1177 | } |
| 1178 | |
| 1179 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1180 | 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] | 1181 | { |
| 1182 | struct inode *inode = state->inode; |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1183 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | struct file_lock *fl; |
| 1185 | int status = 0; |
| 1186 | |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1187 | if (inode->i_flock == NULL) |
| 1188 | return 0; |
| 1189 | |
| 1190 | /* Guard against delegation returns and new lock/unlock calls */ |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1191 | down_write(&nfsi->rwsem); |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1192 | /* Protect inode->i_flock using the BKL */ |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1193 | lock_flocks(); |
Harvey Harrison | 90dc7d2 | 2008-02-20 13:03:05 -0800 | [diff] [blame] | 1194 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 1195 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | continue; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 1197 | if (nfs_file_open_context(fl->fl_file)->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | continue; |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1199 | unlock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | status = ops->recover_lock(state, fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | switch (status) { |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1202 | case 0: |
| 1203 | break; |
| 1204 | case -ESTALE: |
| 1205 | case -NFS4ERR_ADMIN_REVOKED: |
| 1206 | case -NFS4ERR_STALE_STATEID: |
| 1207 | case -NFS4ERR_BAD_STATEID: |
| 1208 | case -NFS4ERR_EXPIRED: |
| 1209 | case -NFS4ERR_NO_GRACE: |
| 1210 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1211 | case -NFS4ERR_BADSESSION: |
| 1212 | case -NFS4ERR_BADSLOT: |
| 1213 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1214 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1215 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | default: |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 1217 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
| 1218 | "Zeroing state\n", __func__, status); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1219 | case -ENOMEM: |
| 1220 | case -NFS4ERR_DENIED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | case -NFS4ERR_RECLAIM_BAD: |
| 1222 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 1223 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1224 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | } |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1226 | lock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | } |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1228 | unlock_flocks(); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1229 | out: |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1230 | up_write(&nfsi->rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | return status; |
| 1232 | } |
| 1233 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1234 | 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] | 1235 | { |
| 1236 | struct nfs4_state *state; |
| 1237 | struct nfs4_lock_state *lock; |
| 1238 | int status = 0; |
| 1239 | |
| 1240 | /* Note: we rely on the sp->so_states list being ordered |
| 1241 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) |
| 1242 | * states first. |
| 1243 | * This is needed to ensure that the server won't give us any |
| 1244 | * read delegations that we have to return if, say, we are |
| 1245 | * recovering after a network partition or a reboot from a |
| 1246 | * server that doesn't support a grace period. |
| 1247 | */ |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1248 | restart: |
| 1249 | spin_lock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1251 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
| 1252 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | if (state->state == 0) |
| 1254 | continue; |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1255 | atomic_inc(&state->count); |
| 1256 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | status = ops->recover_open(sp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | if (status >= 0) { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1259 | status = nfs4_reclaim_locks(state, ops); |
| 1260 | if (status >= 0) { |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1261 | spin_lock(&state->state_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1262 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
| 1263 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) |
William Dauchy | 96dcadc | 2012-03-14 12:32:04 +0100 | [diff] [blame^] | 1264 | pr_warn_ratelimited("NFS: " |
| 1265 | "%s: Lock reclaim " |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 1266 | "failed!\n", __func__); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1267 | } |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1268 | spin_unlock(&state->state_lock); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1269 | nfs4_put_open_state(state); |
| 1270 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | } |
| 1273 | switch (status) { |
| 1274 | default: |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 1275 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
| 1276 | "Zeroing state\n", __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | case -ENOENT: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1278 | case -ENOMEM: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1279 | case -ESTALE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | /* |
| 1281 | * Open state on this file cannot be recovered |
| 1282 | * All we can do is revert to using the zero stateid. |
| 1283 | */ |
Trond Myklebust | 2d2f24a | 2012-03-04 18:13:57 -0500 | [diff] [blame] | 1284 | memset(&state->stateid, 0, |
| 1285 | sizeof(state->stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | /* Mark the file as being 'closed' */ |
| 1287 | state->state = 0; |
| 1288 | break; |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1289 | case -EKEYEXPIRED: |
| 1290 | /* |
| 1291 | * User RPCSEC_GSS context has expired. |
| 1292 | * We cannot recover this stateid now, so |
| 1293 | * skip it and allow recovery thread to |
| 1294 | * proceed. |
| 1295 | */ |
| 1296 | break; |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1297 | case -NFS4ERR_ADMIN_REVOKED: |
| 1298 | case -NFS4ERR_STALE_STATEID: |
| 1299 | case -NFS4ERR_BAD_STATEID: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1300 | case -NFS4ERR_RECLAIM_BAD: |
| 1301 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1302 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1303 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | case -NFS4ERR_EXPIRED: |
| 1305 | case -NFS4ERR_NO_GRACE: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1306 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1308 | case -NFS4ERR_BADSESSION: |
| 1309 | case -NFS4ERR_BADSLOT: |
| 1310 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1311 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | goto out_err; |
| 1313 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1314 | nfs4_put_open_state(state); |
| 1315 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1317 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | return 0; |
| 1319 | out_err: |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1320 | nfs4_put_open_state(state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | return status; |
| 1322 | } |
| 1323 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1324 | static void nfs4_clear_open_state(struct nfs4_state *state) |
| 1325 | { |
| 1326 | struct nfs4_lock_state *lock; |
| 1327 | |
| 1328 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1329 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1330 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1331 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1332 | spin_lock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1333 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1334 | lock->ls_seqid.flags = 0; |
| 1335 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; |
| 1336 | } |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1337 | spin_unlock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1338 | } |
| 1339 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1340 | static void nfs4_reset_seqids(struct nfs_server *server, |
| 1341 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1342 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1343 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1344 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1345 | struct rb_node *pos; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1346 | struct nfs4_state *state; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1347 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1348 | spin_lock(&clp->cl_lock); |
| 1349 | for (pos = rb_first(&server->state_owners); |
| 1350 | pos != NULL; |
| 1351 | pos = rb_next(pos)) { |
| 1352 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1353 | sp->so_seqid.flags = 0; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1354 | spin_lock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1355 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1356 | if (mark_reclaim(clp, state)) |
| 1357 | nfs4_clear_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1358 | } |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1359 | spin_unlock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1360 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1361 | spin_unlock(&clp->cl_lock); |
| 1362 | } |
| 1363 | |
| 1364 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, |
| 1365 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
| 1366 | { |
| 1367 | struct nfs_server *server; |
| 1368 | |
| 1369 | rcu_read_lock(); |
| 1370 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1371 | nfs4_reset_seqids(server, mark_reclaim); |
| 1372 | rcu_read_unlock(); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1373 | } |
| 1374 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1375 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
| 1376 | { |
| 1377 | /* Mark all delegations for reclaim */ |
| 1378 | nfs_delegation_mark_reclaim(clp); |
| 1379 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); |
| 1380 | } |
| 1381 | |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1382 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
| 1383 | const struct nfs4_state_recovery_ops *ops) |
| 1384 | { |
| 1385 | /* Notify the server we're done reclaiming our state */ |
| 1386 | if (ops->reclaim_complete) |
| 1387 | (void)ops->reclaim_complete(clp); |
| 1388 | } |
| 1389 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1390 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1391 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1392 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1393 | struct nfs4_state_owner *sp; |
| 1394 | struct rb_node *pos; |
| 1395 | struct nfs4_state *state; |
| 1396 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1397 | spin_lock(&clp->cl_lock); |
| 1398 | for (pos = rb_first(&server->state_owners); |
| 1399 | pos != NULL; |
| 1400 | pos = rb_next(pos)) { |
| 1401 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1402 | spin_lock(&sp->so_lock); |
| 1403 | list_for_each_entry(state, &sp->so_states, open_states) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1404 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
| 1405 | &state->flags)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1406 | continue; |
| 1407 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1408 | } |
| 1409 | spin_unlock(&sp->so_lock); |
| 1410 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1411 | spin_unlock(&clp->cl_lock); |
| 1412 | } |
| 1413 | |
| 1414 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
| 1415 | { |
| 1416 | struct nfs_server *server; |
| 1417 | |
| 1418 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1419 | return 0; |
| 1420 | |
| 1421 | rcu_read_lock(); |
| 1422 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1423 | nfs4_clear_reclaim_server(server); |
| 1424 | rcu_read_unlock(); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1425 | |
| 1426 | nfs_delegation_reap_unclaimed(clp); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1427 | return 1; |
| 1428 | } |
| 1429 | |
| 1430 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
| 1431 | { |
| 1432 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
| 1433 | return; |
| 1434 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1435 | } |
| 1436 | |
| 1437 | static void nfs_delegation_clear_all(struct nfs_client *clp) |
| 1438 | { |
| 1439 | nfs_delegation_mark_reclaim(clp); |
| 1440 | nfs_delegation_reap_unclaimed(clp); |
| 1441 | } |
| 1442 | |
| 1443 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
| 1444 | { |
| 1445 | nfs_delegation_clear_all(clp); |
| 1446 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 1447 | } |
| 1448 | |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1449 | static void nfs4_warn_keyexpired(const char *s) |
| 1450 | { |
| 1451 | printk_ratelimited(KERN_WARNING "Error: state manager" |
| 1452 | " encountered RPCSEC_GSS session" |
| 1453 | " expired against NFSv4 server %s.\n", |
| 1454 | s); |
| 1455 | } |
| 1456 | |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1457 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1458 | { |
| 1459 | switch (error) { |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1460 | case 0: |
| 1461 | break; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1462 | case -NFS4ERR_CB_PATH_DOWN: |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1463 | nfs40_handle_cb_pathdown(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1464 | break; |
Trond Myklebust | c8b7ae3d | 2009-12-03 15:53:21 -0500 | [diff] [blame] | 1465 | case -NFS4ERR_NO_GRACE: |
| 1466 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1467 | break; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1468 | case -NFS4ERR_STALE_CLIENTID: |
| 1469 | case -NFS4ERR_LEASE_MOVED: |
| 1470 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1471 | nfs4_state_clear_reclaim_reboot(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1472 | nfs4_state_start_reclaim_reboot(clp); |
| 1473 | break; |
| 1474 | case -NFS4ERR_EXPIRED: |
| 1475 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1476 | nfs4_state_start_reclaim_nograce(clp); |
Andy Adamson | 8ba9bf8 | 2009-12-04 15:55:34 -0500 | [diff] [blame] | 1477 | break; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1478 | case -NFS4ERR_BADSESSION: |
| 1479 | case -NFS4ERR_BADSLOT: |
| 1480 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1481 | case -NFS4ERR_DEADSESSION: |
| 1482 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1483 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 1484 | case -NFS4ERR_SEQ_MISORDERED: |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1485 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 0b9e2d4 | 2009-12-04 16:02:14 -0500 | [diff] [blame] | 1486 | /* Zero session reset errors */ |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1487 | break; |
Trond Myklebust | 168667c | 2010-10-19 19:47:49 -0400 | [diff] [blame] | 1488 | case -EKEYEXPIRED: |
| 1489 | /* Nothing we can do */ |
| 1490 | nfs4_warn_keyexpired(clp->cl_hostname); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1491 | break; |
| 1492 | default: |
| 1493 | return error; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1494 | } |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1495 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1496 | } |
| 1497 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1498 | 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] | 1499 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1500 | struct nfs4_state_owner *sp; |
| 1501 | struct nfs_server *server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1502 | struct rb_node *pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | int status = 0; |
| 1504 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1505 | restart: |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1506 | rcu_read_lock(); |
| 1507 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 1508 | nfs4_purge_state_owners(server); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1509 | spin_lock(&clp->cl_lock); |
| 1510 | for (pos = rb_first(&server->state_owners); |
| 1511 | pos != NULL; |
| 1512 | pos = rb_next(pos)) { |
| 1513 | sp = rb_entry(pos, |
| 1514 | struct nfs4_state_owner, so_server_node); |
| 1515 | if (!test_and_clear_bit(ops->owner_flag_bit, |
| 1516 | &sp->so_flags)) |
| 1517 | continue; |
| 1518 | atomic_inc(&sp->so_count); |
| 1519 | spin_unlock(&clp->cl_lock); |
| 1520 | rcu_read_unlock(); |
| 1521 | |
| 1522 | status = nfs4_reclaim_open_state(sp, ops); |
| 1523 | if (status < 0) { |
| 1524 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
| 1525 | nfs4_put_state_owner(sp); |
| 1526 | return nfs4_recovery_handle_error(clp, status); |
| 1527 | } |
| 1528 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1529 | nfs4_put_state_owner(sp); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1530 | goto restart; |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1531 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1532 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1533 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1534 | rcu_read_unlock(); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1535 | return status; |
| 1536 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1538 | static int nfs4_check_lease(struct nfs_client *clp) |
| 1539 | { |
| 1540 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1541 | const struct nfs4_state_maintenance_ops *ops = |
| 1542 | clp->cl_mvops->state_renewal_ops; |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1543 | int status; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1544 | |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1545 | /* Is the client already known to have an expired lease? */ |
| 1546 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1547 | return 0; |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 1548 | spin_lock(&clp->cl_lock); |
| 1549 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1550 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1551 | if (cred == NULL) { |
| 1552 | cred = nfs4_get_setclientid_cred(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1553 | status = -ENOKEY; |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1554 | if (cred == NULL) |
| 1555 | goto out; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1556 | } |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1557 | status = ops->renew_lease(clp, cred); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1558 | put_rpccred(cred); |
| 1559 | out: |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1560 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1561 | } |
| 1562 | |
| 1563 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
| 1564 | { |
| 1565 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1566 | const struct nfs4_state_recovery_ops *ops = |
| 1567 | clp->cl_mvops->reboot_recovery_ops; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1568 | int status = -ENOENT; |
| 1569 | |
Andy Adamson | 90a1661 | 2009-04-01 09:22:48 -0400 | [diff] [blame] | 1570 | cred = ops->get_clid_cred(clp); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1571 | if (cred != NULL) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1572 | status = ops->establish_clid(clp, cred); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1573 | put_rpccred(cred); |
| 1574 | /* Handle case where the user hasn't set up machine creds */ |
| 1575 | if (status == -EACCES && cred == clp->cl_machine_cred) { |
| 1576 | nfs4_clear_machine_cred(clp); |
| 1577 | status = -EAGAIN; |
| 1578 | } |
Benny Halevy | c2e713d | 2009-04-01 09:21:51 -0400 | [diff] [blame] | 1579 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
| 1580 | status = -EPROTONOSUPPORT; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1581 | } |
| 1582 | return status; |
| 1583 | } |
| 1584 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1585 | #ifdef CONFIG_NFS_V4_1 |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1586 | void nfs4_schedule_session_recovery(struct nfs4_session *session) |
| 1587 | { |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 1588 | struct nfs_client *clp = session->clp; |
| 1589 | |
| 1590 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 1591 | nfs4_schedule_lease_recovery(clp); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1592 | } |
Andy Adamson | cbdabc7 | 2011-03-01 01:34:20 +0000 | [diff] [blame] | 1593 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1594 | |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1595 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
| 1596 | { |
| 1597 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1598 | nfs4_schedule_state_manager(clp); |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1599 | } |
| 1600 | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1601 | static void nfs4_reset_all_state(struct nfs_client *clp) |
| 1602 | { |
| 1603 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 1604 | clp->cl_boot_time = CURRENT_TIME; |
| 1605 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1606 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1607 | } |
| 1608 | } |
| 1609 | |
| 1610 | static void nfs41_handle_server_reboot(struct nfs_client *clp) |
| 1611 | { |
| 1612 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 1613 | nfs4_state_start_reclaim_reboot(clp); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1614 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1615 | } |
| 1616 | } |
| 1617 | |
| 1618 | static void nfs41_handle_state_revoked(struct nfs_client *clp) |
| 1619 | { |
| 1620 | /* Temporary */ |
| 1621 | nfs4_reset_all_state(clp); |
| 1622 | } |
| 1623 | |
| 1624 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
| 1625 | { |
| 1626 | /* This will need to handle layouts too */ |
| 1627 | nfs_expire_all_delegations(clp); |
| 1628 | } |
| 1629 | |
| 1630 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
| 1631 | { |
| 1632 | nfs_expire_all_delegations(clp); |
| 1633 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1634 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1635 | } |
| 1636 | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1637 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
| 1638 | { |
| 1639 | if (!flags) |
| 1640 | return; |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 1641 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1642 | nfs41_handle_server_reboot(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 1643 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1644 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
| 1645 | SEQ4_STATUS_ADMIN_STATE_REVOKED | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1646 | SEQ4_STATUS_LEASE_MOVED)) |
| 1647 | nfs41_handle_state_revoked(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 1648 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1649 | nfs41_handle_recallable_state_revoked(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 1650 | if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1651 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
| 1652 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1653 | nfs41_handle_cb_path_down(clp); |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1654 | } |
| 1655 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1656 | static int nfs4_reset_session(struct nfs_client *clp) |
| 1657 | { |
| 1658 | int status; |
| 1659 | |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 1660 | nfs4_begin_drain_session(clp); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1661 | status = nfs4_proc_destroy_session(clp->cl_session); |
| 1662 | if (status && status != -NFS4ERR_BADSESSION && |
| 1663 | status != -NFS4ERR_DEADSESSION) { |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 1664 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1665 | goto out; |
| 1666 | } |
| 1667 | |
| 1668 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
Trond Myklebust | f26468f | 2009-12-05 19:32:11 -0500 | [diff] [blame] | 1669 | status = nfs4_proc_create_session(clp); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1670 | if (status) { |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 1671 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1672 | goto out; |
| 1673 | } |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 1674 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1675 | /* create_session negotiated new slot table */ |
| 1676 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 1677 | |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1678 | /* Let the state manager reestablish state */ |
| 1679 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1680 | nfs41_setup_state_renewal(clp); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 1681 | out: |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1682 | return status; |
| 1683 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1684 | |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1685 | static int nfs4_recall_slot(struct nfs_client *clp) |
| 1686 | { |
| 1687 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; |
| 1688 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; |
| 1689 | struct nfs4_slot *new, *old; |
| 1690 | int i; |
| 1691 | |
| 1692 | nfs4_begin_drain_session(clp); |
| 1693 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1694 | GFP_NOFS); |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1695 | if (!new) |
| 1696 | return -ENOMEM; |
| 1697 | |
| 1698 | spin_lock(&fc_tbl->slot_tbl_lock); |
| 1699 | for (i = 0; i < fc_tbl->target_max_slots; i++) |
| 1700 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; |
| 1701 | old = fc_tbl->slots; |
| 1702 | fc_tbl->slots = new; |
| 1703 | fc_tbl->max_slots = fc_tbl->target_max_slots; |
| 1704 | fc_tbl->target_max_slots = 0; |
| 1705 | fc_attrs->max_reqs = fc_tbl->max_slots; |
| 1706 | spin_unlock(&fc_tbl->slot_tbl_lock); |
| 1707 | |
| 1708 | kfree(old); |
| 1709 | nfs4_end_drain_session(clp); |
| 1710 | return 0; |
| 1711 | } |
| 1712 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1713 | #else /* CONFIG_NFS_V4_1 */ |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1714 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1715 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1716 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1717 | #endif /* CONFIG_NFS_V4_1 */ |
| 1718 | |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1719 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
| 1720 | * on EXCHANGE_ID for v4.1 |
| 1721 | */ |
| 1722 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) |
| 1723 | { |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 1724 | switch (status) { |
| 1725 | case -NFS4ERR_CLID_INUSE: |
| 1726 | case -NFS4ERR_STALE_CLIENTID: |
| 1727 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 1728 | break; |
| 1729 | case -NFS4ERR_DELAY: |
Trond Myklebust | 1bd714f | 2011-04-24 14:29:33 -0400 | [diff] [blame] | 1730 | case -ETIMEDOUT: |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 1731 | case -EAGAIN: |
| 1732 | ssleep(1); |
| 1733 | break; |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1734 | |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 1735 | case -EKEYEXPIRED: |
| 1736 | nfs4_warn_keyexpired(clp->cl_hostname); |
| 1737 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 1738 | * in nfs4_exchange_id */ |
| 1739 | default: |
| 1740 | return; |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1741 | } |
| 1742 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1743 | } |
| 1744 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1745 | static void nfs4_state_manager(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1746 | { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1747 | int status = 0; |
| 1748 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1749 | /* Ensure exclusive access to NFSv4 state */ |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 1750 | do { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1751 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
| 1752 | /* We're going to have to re-establish a clientid */ |
| 1753 | status = nfs4_reclaim_lease(clp); |
| 1754 | if (status) { |
Andy Adamson | 78722e9 | 2009-06-16 14:43:15 -0400 | [diff] [blame] | 1755 | nfs4_set_lease_expired(clp, status); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1756 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
| 1757 | &clp->cl_state)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1758 | continue; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1759 | if (clp->cl_cons_state == |
| 1760 | NFS_CS_SESSION_INITING) |
| 1761 | nfs_mark_client_ready(clp, status); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1762 | goto out_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | } |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1764 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Weston Andros Adamson | 78fe0f4 | 2011-05-31 19:05:47 -0400 | [diff] [blame] | 1765 | |
| 1766 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, |
| 1767 | &clp->cl_state)) |
| 1768 | nfs4_state_start_reclaim_nograce(clp); |
| 1769 | else |
| 1770 | set_bit(NFS4CLNT_RECLAIM_REBOOT, |
| 1771 | &clp->cl_state); |
| 1772 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1773 | pnfs_destroy_all_layouts(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1774 | } |
| 1775 | |
| 1776 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
| 1777 | status = nfs4_check_lease(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1778 | if (status < 0) |
| 1779 | goto out_error; |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1780 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1781 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1783 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1784 | /* Initialize or reset the session */ |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1785 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
Trond Myklebust | 7111dc7 | 2009-08-24 19:21:29 -0400 | [diff] [blame] | 1786 | && nfs4_has_session(clp)) { |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 1787 | status = nfs4_reset_session(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1788 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1789 | continue; |
| 1790 | if (status < 0) |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1791 | goto out_error; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1792 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1793 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1794 | /* First recover reboot state... */ |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 1795 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1796 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1797 | clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1798 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1799 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1800 | continue; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1801 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1802 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 1803 | continue; |
| 1804 | if (status < 0) |
| 1805 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1806 | } |
| 1807 | |
| 1808 | /* Now recover expired state... */ |
| 1809 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 1810 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1811 | clp->cl_mvops->nograce_recovery_ops); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1812 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1813 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 1814 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1815 | continue; |
| 1816 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1817 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1818 | } |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1819 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1820 | nfs4_end_drain_session(clp); |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 1821 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
| 1822 | nfs_client_return_marked_delegations(clp); |
| 1823 | continue; |
| 1824 | } |
Andy Adamson | b9efa1b | 2010-01-20 16:06:27 -0500 | [diff] [blame] | 1825 | /* Recall session slots */ |
| 1826 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) |
| 1827 | && nfs4_has_session(clp)) { |
| 1828 | status = nfs4_recall_slot(clp); |
| 1829 | if (status < 0) |
| 1830 | goto out_error; |
| 1831 | continue; |
| 1832 | } |
| 1833 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1834 | |
| 1835 | nfs4_clear_state_manager_bit(clp); |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1836 | /* Did we race with an attempt to give us more work? */ |
| 1837 | if (clp->cl_state == 0) |
| 1838 | break; |
| 1839 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1840 | break; |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 1841 | } while (atomic_read(&clp->cl_count) > 1); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1842 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | out_error: |
Trond Myklebust | 9a3ba43 | 2012-03-12 18:01:48 -0400 | [diff] [blame] | 1844 | pr_warn_ratelimited("NFS: state manager failed on NFSv4 server %s" |
Chuck Lever | 5d8515c | 2007-12-10 14:57:16 -0500 | [diff] [blame] | 1845 | " with error %d\n", clp->cl_hostname, -status); |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 1846 | nfs4_end_drain_session(clp); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1847 | nfs4_clear_state_manager_bit(clp); |
| 1848 | } |
| 1849 | |
| 1850 | static int nfs4_run_state_manager(void *ptr) |
| 1851 | { |
| 1852 | struct nfs_client *clp = ptr; |
| 1853 | |
| 1854 | allow_signal(SIGKILL); |
| 1855 | nfs4_state_manager(clp); |
| 1856 | nfs_put_client(clp); |
| 1857 | module_put_and_exit(0); |
| 1858 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | } |
| 1860 | |
| 1861 | /* |
| 1862 | * Local variables: |
| 1863 | * c-basic-offset: 8 |
| 1864 | * End: |
| 1865 | */ |