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 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 54 | #include <linux/sunrpc/clnt.h> |
| 55 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 56 | #include "nfs4_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #include "callback.h" |
| 58 | #include "delegation.h" |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 59 | #include "internal.h" |
Trond Myklebust | 76e697b | 2012-11-26 14:20:49 -0500 | [diff] [blame] | 60 | #include "nfs4session.h" |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 61 | #include "pnfs.h" |
Stanislav Kinsbursky | bbe0a3a | 2012-08-20 18:00:36 +0400 | [diff] [blame] | 62 | #include "netns.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Chuck Lever | e3c0fb7 | 2012-05-21 22:45:24 -0400 | [diff] [blame] | 64 | #define NFSDBG_FACILITY NFSDBG_STATE |
| 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #define OPENOWNER_POOL_SIZE 8 |
| 67 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 68 | const nfs4_stateid zero_stateid; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 69 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 71 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | { |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 73 | struct nfs4_setclientid_res clid = { |
| 74 | .clientid = clp->cl_clientid, |
| 75 | .confirm = clp->cl_confirm, |
| 76 | }; |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 77 | unsigned short port; |
| 78 | int status; |
Stanislav Kinsbursky | bbe0a3a | 2012-08-20 18:00:36 +0400 | [diff] [blame] | 79 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 80 | |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 81 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
| 82 | goto do_confirm; |
Stanislav Kinsbursky | bbe0a3a | 2012-08-20 18:00:36 +0400 | [diff] [blame] | 83 | port = nn->nfs_callback_tcpport; |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 84 | if (clp->cl_addr.ss_family == AF_INET6) |
Stanislav Kinsbursky | 29dcc16 | 2012-08-20 18:00:41 +0400 | [diff] [blame] | 85 | port = nn->nfs_callback_tcpport6; |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 86 | |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 87 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
| 88 | if (status != 0) |
| 89 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 90 | clp->cl_clientid = clid.clientid; |
| 91 | clp->cl_confirm = clid.confirm; |
| 92 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 93 | do_confirm: |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 94 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
| 95 | if (status != 0) |
| 96 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 97 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 98 | nfs4_schedule_state_renewal(clp); |
| 99 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | return status; |
| 101 | } |
| 102 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 103 | /** |
| 104 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) |
| 105 | * |
| 106 | * @clp: nfs_client under test |
| 107 | * @result: OUT: found nfs_client, or clp |
| 108 | * @cred: credential to use for trunking test |
| 109 | * |
| 110 | * Returns zero, a negative errno, or a negative NFS4ERR status. |
| 111 | * If zero is returned, an nfs_client pointer is planted in |
| 112 | * "result". |
| 113 | * |
| 114 | * Note: The returned client may not yet be marked ready. |
| 115 | */ |
| 116 | int nfs40_discover_server_trunking(struct nfs_client *clp, |
| 117 | struct nfs_client **result, |
| 118 | struct rpc_cred *cred) |
| 119 | { |
| 120 | struct nfs4_setclientid_res clid = { |
| 121 | .clientid = clp->cl_clientid, |
| 122 | .confirm = clp->cl_confirm, |
| 123 | }; |
Trond Myklebust | 9f62387 | 2012-10-01 16:17:31 -0700 | [diff] [blame] | 124 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 125 | unsigned short port; |
| 126 | int status; |
| 127 | |
Trond Myklebust | 9f62387 | 2012-10-01 16:17:31 -0700 | [diff] [blame] | 128 | port = nn->nfs_callback_tcpport; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 129 | if (clp->cl_addr.ss_family == AF_INET6) |
Trond Myklebust | 9f62387 | 2012-10-01 16:17:31 -0700 | [diff] [blame] | 130 | port = nn->nfs_callback_tcpport6; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 131 | |
| 132 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
| 133 | if (status != 0) |
| 134 | goto out; |
| 135 | clp->cl_clientid = clid.clientid; |
| 136 | clp->cl_confirm = clid.confirm; |
| 137 | |
| 138 | status = nfs40_walk_client_list(clp, result, cred); |
| 139 | switch (status) { |
| 140 | case -NFS4ERR_STALE_CLIENTID: |
| 141 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 142 | case 0: |
| 143 | /* Sustain the lease, even if it's empty. If the clientid4 |
| 144 | * goes stale it's of no use for trunking discovery. */ |
| 145 | nfs4_schedule_state_renewal(*result); |
| 146 | break; |
| 147 | } |
| 148 | |
| 149 | out: |
| 150 | return status; |
| 151 | } |
| 152 | |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 153 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 154 | { |
| 155 | struct rpc_cred *cred = NULL; |
| 156 | |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 157 | if (clp->cl_machine_cred != NULL) |
| 158 | cred = get_rpccred(clp->cl_machine_cred); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 159 | return cred; |
| 160 | } |
| 161 | |
| 162 | static void nfs4_clear_machine_cred(struct nfs_client *clp) |
| 163 | { |
| 164 | struct rpc_cred *cred; |
| 165 | |
| 166 | spin_lock(&clp->cl_lock); |
| 167 | cred = clp->cl_machine_cred; |
| 168 | clp->cl_machine_cred = NULL; |
| 169 | spin_unlock(&clp->cl_lock); |
| 170 | if (cred != NULL) |
| 171 | put_rpccred(cred); |
| 172 | } |
| 173 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 174 | static struct rpc_cred * |
| 175 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 176 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 177 | struct rpc_cred *cred = NULL; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 178 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 179 | struct rb_node *pos; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 180 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 181 | for (pos = rb_first(&server->state_owners); |
| 182 | pos != NULL; |
| 183 | pos = rb_next(pos)) { |
| 184 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 185 | if (list_empty(&sp->so_states)) |
| 186 | continue; |
| 187 | cred = get_rpccred(sp->so_cred); |
| 188 | break; |
| 189 | } |
| 190 | return cred; |
| 191 | } |
| 192 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 193 | /** |
| 194 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation |
| 195 | * @clp: client state handle |
| 196 | * |
| 197 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 198 | * Caller must hold clp->cl_lock. |
| 199 | */ |
| 200 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) |
| 201 | { |
| 202 | struct rpc_cred *cred = NULL; |
| 203 | struct nfs_server *server; |
| 204 | |
Sachin Prabhu | e49a29b | 2012-03-16 19:25:52 +0000 | [diff] [blame] | 205 | /* Use machine credentials if available */ |
| 206 | cred = nfs4_get_machine_cred_locked(clp); |
| 207 | if (cred != NULL) |
| 208 | goto out; |
| 209 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 210 | rcu_read_lock(); |
| 211 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 212 | cred = nfs4_get_renew_cred_server_locked(server); |
| 213 | if (cred != NULL) |
| 214 | break; |
| 215 | } |
| 216 | rcu_read_unlock(); |
Sachin Prabhu | e49a29b | 2012-03-16 19:25:52 +0000 | [diff] [blame] | 217 | |
| 218 | out: |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 219 | return cred; |
| 220 | } |
| 221 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 222 | #if defined(CONFIG_NFS_V4_1) |
| 223 | |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 224 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
| 225 | { |
| 226 | int status; |
| 227 | struct nfs_fsinfo fsinfo; |
| 228 | |
Andy Adamson | d6fb79d | 2011-03-01 01:34:11 +0000 | [diff] [blame] | 229 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { |
| 230 | nfs4_schedule_state_renewal(clp); |
| 231 | return 0; |
| 232 | } |
| 233 | |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 234 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
| 235 | if (status == 0) { |
| 236 | /* Update lease time and schedule renewal */ |
| 237 | spin_lock(&clp->cl_lock); |
| 238 | clp->cl_lease_time = fsinfo.lease_time * HZ; |
| 239 | clp->cl_last_renewal = jiffies; |
| 240 | spin_unlock(&clp->cl_lock); |
| 241 | |
| 242 | nfs4_schedule_state_renewal(clp); |
| 243 | } |
| 244 | |
| 245 | return status; |
| 246 | } |
| 247 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 248 | /* |
| 249 | * Back channel returns NFS4ERR_DELAY for new requests when |
| 250 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining |
| 251 | * is ended. |
| 252 | */ |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 253 | static void nfs4_end_drain_session(struct nfs_client *clp) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 254 | { |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 255 | struct nfs4_session *ses = clp->cl_session; |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 256 | struct nfs4_slot_table *tbl; |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 257 | |
Trond Myklebust | a2118c3 | 2010-06-16 09:52:26 -0400 | [diff] [blame] | 258 | if (ses == NULL) |
| 259 | return; |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 260 | tbl = &ses->fc_slot_table; |
Trond Myklebust | a2118c3 | 2010-06-16 09:52:26 -0400 | [diff] [blame] | 261 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 262 | spin_lock(&tbl->slot_tbl_lock); |
Trond Myklebust | b75ad4c | 2012-11-29 17:27:47 -0500 | [diff] [blame] | 263 | nfs41_wake_slot_table(tbl); |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 264 | spin_unlock(&tbl->slot_tbl_lock); |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 265 | } |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 266 | } |
| 267 | |
Trond Myklebust | 5d63360 | 2012-11-23 13:09:38 -0500 | [diff] [blame] | 268 | /* |
| 269 | * Signal state manager thread if session fore channel is drained |
| 270 | */ |
| 271 | void nfs4_session_drain_complete(struct nfs4_session *session, |
| 272 | struct nfs4_slot_table *tbl) |
| 273 | { |
| 274 | if (nfs4_session_draining(session)) |
| 275 | complete(&tbl->complete); |
| 276 | } |
| 277 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 278 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 279 | { |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 280 | spin_lock(&tbl->slot_tbl_lock); |
Andy Adamson | b6bf6e7 | 2012-02-17 13:05:23 -0500 | [diff] [blame] | 281 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 282 | INIT_COMPLETION(tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 283 | spin_unlock(&tbl->slot_tbl_lock); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 284 | return wait_for_completion_interruptible(&tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 285 | } |
| 286 | spin_unlock(&tbl->slot_tbl_lock); |
| 287 | return 0; |
| 288 | } |
| 289 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 290 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
| 291 | { |
| 292 | struct nfs4_session *ses = clp->cl_session; |
| 293 | int ret = 0; |
| 294 | |
| 295 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); |
| 296 | /* back channel */ |
| 297 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); |
| 298 | if (ret) |
| 299 | return ret; |
| 300 | /* fore channel */ |
| 301 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); |
| 302 | } |
| 303 | |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 304 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
| 305 | { |
| 306 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 307 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 308 | /* create_session negotiated new slot table */ |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 309 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 310 | nfs41_setup_state_renewal(clp); |
| 311 | } |
| 312 | |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 313 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
| 314 | { |
| 315 | int status; |
| 316 | |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 317 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
| 318 | goto do_confirm; |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 319 | nfs4_begin_drain_session(clp); |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 320 | status = nfs4_proc_exchange_id(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 321 | if (status != 0) |
| 322 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 323 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 324 | do_confirm: |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 325 | status = nfs4_proc_create_session(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 326 | if (status != 0) |
| 327 | goto out; |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 328 | nfs41_finish_session_reset(clp); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 329 | nfs_mark_client_ready(clp, NFS_CS_READY); |
| 330 | out: |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 331 | return status; |
| 332 | } |
| 333 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 334 | /** |
| 335 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) |
| 336 | * |
| 337 | * @clp: nfs_client under test |
| 338 | * @result: OUT: found nfs_client, or clp |
| 339 | * @cred: credential to use for trunking test |
| 340 | * |
| 341 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. |
| 342 | * If NFS4_OK is returned, an nfs_client pointer is planted in |
| 343 | * "result". |
| 344 | * |
| 345 | * Note: The returned client may not yet be marked ready. |
| 346 | */ |
| 347 | int nfs41_discover_server_trunking(struct nfs_client *clp, |
| 348 | struct nfs_client **result, |
| 349 | struct rpc_cred *cred) |
| 350 | { |
| 351 | int status; |
| 352 | |
| 353 | status = nfs4_proc_exchange_id(clp, cred); |
| 354 | if (status != NFS4_OK) |
| 355 | return status; |
Weston Andros Adamson | fd48357 | 2012-10-02 11:33:22 -0700 | [diff] [blame] | 356 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 357 | |
| 358 | return nfs41_walk_client_list(clp, result, cred); |
| 359 | } |
| 360 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 361 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
| 362 | { |
| 363 | struct rpc_cred *cred; |
| 364 | |
| 365 | spin_lock(&clp->cl_lock); |
| 366 | cred = nfs4_get_machine_cred_locked(clp); |
| 367 | spin_unlock(&clp->cl_lock); |
| 368 | return cred; |
| 369 | } |
| 370 | |
| 371 | #endif /* CONFIG_NFS_V4_1 */ |
| 372 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 373 | static struct rpc_cred * |
| 374 | nfs4_get_setclientid_cred_server(struct nfs_server *server) |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 375 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 376 | struct nfs_client *clp = server->nfs_client; |
| 377 | struct rpc_cred *cred = NULL; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 378 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 379 | struct rb_node *pos; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 380 | |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 381 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 382 | pos = rb_first(&server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 383 | if (pos != NULL) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 384 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 385 | cred = get_rpccred(sp->so_cred); |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 386 | } |
Trond Myklebust | 6dc9d57 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 387 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 388 | return cred; |
Trond Myklebust | 286d7d6 | 2006-01-03 09:55:26 +0100 | [diff] [blame] | 389 | } |
| 390 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 391 | /** |
| 392 | * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation |
| 393 | * @clp: client state handle |
| 394 | * |
| 395 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 396 | */ |
| 397 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
| 398 | { |
| 399 | struct nfs_server *server; |
| 400 | struct rpc_cred *cred; |
| 401 | |
| 402 | spin_lock(&clp->cl_lock); |
| 403 | cred = nfs4_get_machine_cred_locked(clp); |
| 404 | spin_unlock(&clp->cl_lock); |
| 405 | if (cred != NULL) |
| 406 | goto out; |
| 407 | |
| 408 | rcu_read_lock(); |
| 409 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 410 | cred = nfs4_get_setclientid_cred_server(server); |
| 411 | if (cred != NULL) |
| 412 | break; |
| 413 | } |
| 414 | rcu_read_unlock(); |
| 415 | |
| 416 | out: |
| 417 | return cred; |
| 418 | } |
| 419 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 421 | 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] | 422 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 423 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 424 | *parent = NULL; |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 425 | struct nfs4_state_owner *sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 427 | while (*p != NULL) { |
| 428 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 429 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 430 | |
| 431 | if (cred < sp->so_cred) |
| 432 | p = &parent->rb_left; |
| 433 | else if (cred > sp->so_cred) |
| 434 | p = &parent->rb_right; |
| 435 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 436 | if (!list_empty(&sp->so_lru)) |
| 437 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 438 | atomic_inc(&sp->so_count); |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 439 | return sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 440 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | } |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 442 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | } |
| 444 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 445 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 446 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 447 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 448 | struct nfs_server *server = new->so_server; |
| 449 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 450 | *parent = NULL; |
| 451 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 452 | int err; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 453 | |
| 454 | while (*p != NULL) { |
| 455 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 456 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 457 | |
| 458 | if (new->so_cred < sp->so_cred) |
| 459 | p = &parent->rb_left; |
| 460 | else if (new->so_cred > sp->so_cred) |
| 461 | p = &parent->rb_right; |
| 462 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 463 | if (!list_empty(&sp->so_lru)) |
| 464 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 465 | atomic_inc(&sp->so_count); |
| 466 | return sp; |
| 467 | } |
| 468 | } |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 469 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 470 | if (err) |
| 471 | return ERR_PTR(err); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 472 | rb_link_node(&new->so_server_node, parent, p); |
| 473 | rb_insert_color(&new->so_server_node, &server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 474 | return new; |
| 475 | } |
| 476 | |
| 477 | static void |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 478 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 479 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 480 | struct nfs_server *server = sp->so_server; |
| 481 | |
| 482 | if (!RB_EMPTY_NODE(&sp->so_server_node)) |
| 483 | rb_erase(&sp->so_server_node, &server->state_owners); |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 484 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 485 | } |
| 486 | |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 487 | static void |
| 488 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) |
| 489 | { |
Trond Myklebust | 95b72eb | 2012-04-20 19:24:51 -0400 | [diff] [blame] | 490 | sc->create_time = ktime_get(); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 491 | sc->flags = 0; |
| 492 | sc->counter = 0; |
| 493 | spin_lock_init(&sc->lock); |
| 494 | INIT_LIST_HEAD(&sc->list); |
| 495 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); |
| 496 | } |
| 497 | |
| 498 | static void |
| 499 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) |
| 500 | { |
| 501 | rpc_destroy_wait_queue(&sc->wait); |
| 502 | } |
| 503 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | /* |
| 505 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to |
| 506 | * create a new state_owner. |
| 507 | * |
| 508 | */ |
| 509 | static struct nfs4_state_owner * |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 510 | nfs4_alloc_state_owner(struct nfs_server *server, |
| 511 | struct rpc_cred *cred, |
| 512 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | { |
| 514 | struct nfs4_state_owner *sp; |
| 515 | |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 516 | sp = kzalloc(sizeof(*sp), gfp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | if (!sp) |
| 518 | return NULL; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 519 | sp->so_server = server; |
| 520 | sp->so_cred = get_rpccred(cred); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 521 | spin_lock_init(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | INIT_LIST_HEAD(&sp->so_states); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 523 | nfs4_init_seqid_counter(&sp->so_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | atomic_set(&sp->so_count, 1); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 525 | INIT_LIST_HEAD(&sp->so_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | return sp; |
| 527 | } |
| 528 | |
Adrian Bunk | 1d2e88e | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 529 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
| 531 | { |
Trond Myklebust | c77365c | 2012-04-21 12:31:05 -0400 | [diff] [blame] | 532 | struct rb_node *rb_node = &sp->so_server_node; |
| 533 | |
| 534 | if (!RB_EMPTY_NODE(rb_node)) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 535 | struct nfs_server *server = sp->so_server; |
| 536 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 537 | |
| 538 | spin_lock(&clp->cl_lock); |
Trond Myklebust | c77365c | 2012-04-21 12:31:05 -0400 | [diff] [blame] | 539 | if (!RB_EMPTY_NODE(rb_node)) { |
| 540 | rb_erase(rb_node, &server->state_owners); |
| 541 | RB_CLEAR_NODE(rb_node); |
| 542 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 543 | spin_unlock(&clp->cl_lock); |
| 544 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | } |
| 546 | |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 547 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
| 548 | { |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 549 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 550 | put_rpccred(sp->so_cred); |
| 551 | kfree(sp); |
| 552 | } |
| 553 | |
| 554 | static void nfs4_gc_state_owners(struct nfs_server *server) |
| 555 | { |
| 556 | struct nfs_client *clp = server->nfs_client; |
| 557 | struct nfs4_state_owner *sp, *tmp; |
| 558 | unsigned long time_min, time_max; |
| 559 | LIST_HEAD(doomed); |
| 560 | |
| 561 | spin_lock(&clp->cl_lock); |
| 562 | time_max = jiffies; |
| 563 | time_min = (long)time_max - (long)clp->cl_lease_time; |
| 564 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 565 | /* NB: LRU is sorted so that oldest is at the head */ |
| 566 | if (time_in_range(sp->so_expires, time_min, time_max)) |
| 567 | break; |
| 568 | list_move(&sp->so_lru, &doomed); |
| 569 | nfs4_remove_state_owner_locked(sp); |
| 570 | } |
| 571 | spin_unlock(&clp->cl_lock); |
| 572 | |
| 573 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 574 | list_del(&sp->so_lru); |
| 575 | nfs4_free_state_owner(sp); |
| 576 | } |
| 577 | } |
| 578 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 579 | /** |
| 580 | * nfs4_get_state_owner - Look up a state owner given a credential |
| 581 | * @server: nfs_server to search |
| 582 | * @cred: RPC credential to match |
| 583 | * |
| 584 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. |
| 585 | */ |
| 586 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 587 | struct rpc_cred *cred, |
| 588 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 590 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | struct nfs4_state_owner *sp, *new; |
| 592 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 594 | sp = nfs4_find_state_owner_locked(server, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | if (sp != NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 597 | goto out; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 598 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 599 | if (new == NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 600 | goto out; |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 601 | do { |
| 602 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) |
| 603 | break; |
| 604 | spin_lock(&clp->cl_lock); |
| 605 | sp = nfs4_insert_state_owner_locked(new); |
| 606 | spin_unlock(&clp->cl_lock); |
| 607 | } while (sp == ERR_PTR(-EAGAIN)); |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 608 | if (sp != new) |
| 609 | nfs4_free_state_owner(new); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 610 | out: |
| 611 | nfs4_gc_state_owners(server); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 612 | return sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
| 614 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 615 | /** |
| 616 | * nfs4_put_state_owner - Release a nfs4_state_owner |
| 617 | * @sp: state owner data to release |
Trond Myklebust | 7bf97bc | 2012-04-21 12:36:19 -0400 | [diff] [blame] | 618 | * |
| 619 | * Note that we keep released state owners on an LRU |
| 620 | * list. |
| 621 | * This caches valid state owners so that they can be |
| 622 | * reused, to avoid the OPEN_CONFIRM on minor version 0. |
| 623 | * It also pins the uniquifier of dropped state owners for |
| 624 | * a while, to ensure that those state owner names are |
| 625 | * never reused. |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 626 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
| 628 | { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 629 | struct nfs_server *server = sp->so_server; |
| 630 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | |
| 632 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) |
| 633 | return; |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 634 | |
Trond Myklebust | 7bf97bc | 2012-04-21 12:36:19 -0400 | [diff] [blame] | 635 | sp->so_expires = jiffies; |
| 636 | list_add_tail(&sp->so_lru, &server->state_owners_lru); |
| 637 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 638 | } |
| 639 | |
| 640 | /** |
| 641 | * nfs4_purge_state_owners - Release all cached state owners |
| 642 | * @server: nfs_server with cached state owners to release |
| 643 | * |
| 644 | * Called at umount time. Remaining state owners will be on |
| 645 | * the LRU with ref count of zero. |
| 646 | */ |
| 647 | void nfs4_purge_state_owners(struct nfs_server *server) |
| 648 | { |
| 649 | struct nfs_client *clp = server->nfs_client; |
| 650 | struct nfs4_state_owner *sp, *tmp; |
| 651 | LIST_HEAD(doomed); |
| 652 | |
| 653 | spin_lock(&clp->cl_lock); |
| 654 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 655 | list_move(&sp->so_lru, &doomed); |
| 656 | nfs4_remove_state_owner_locked(sp); |
| 657 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 659 | |
| 660 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 661 | list_del(&sp->so_lru); |
| 662 | nfs4_free_state_owner(sp); |
| 663 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | } |
| 665 | |
| 666 | static struct nfs4_state * |
| 667 | nfs4_alloc_open_state(void) |
| 668 | { |
| 669 | struct nfs4_state *state; |
| 670 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 671 | state = kzalloc(sizeof(*state), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | if (!state) |
| 673 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | atomic_set(&state->count, 1); |
| 675 | INIT_LIST_HEAD(&state->lock_states); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 676 | spin_lock_init(&state->state_lock); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 677 | seqlock_init(&state->seqlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | return state; |
| 679 | } |
| 680 | |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 681 | void |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 682 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 683 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 684 | if (state->state == fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 685 | return; |
| 686 | /* NB! List reordering - see the reclaim code for why. */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 687 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
| 688 | if (fmode & FMODE_WRITE) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 689 | list_move(&state->open_states, &state->owner->so_states); |
| 690 | else |
| 691 | list_move_tail(&state->open_states, &state->owner->so_states); |
| 692 | } |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 693 | state->state = fmode; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 694 | } |
| 695 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | static struct nfs4_state * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) |
| 698 | { |
| 699 | struct nfs_inode *nfsi = NFS_I(inode); |
| 700 | struct nfs4_state *state; |
| 701 | |
| 702 | list_for_each_entry(state, &nfsi->open_states, inode_states) { |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 703 | if (state->owner != owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | continue; |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 705 | if (atomic_inc_not_zero(&state->count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | return state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | } |
| 708 | return NULL; |
| 709 | } |
| 710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | static void |
| 712 | nfs4_free_open_state(struct nfs4_state *state) |
| 713 | { |
| 714 | kfree(state); |
| 715 | } |
| 716 | |
| 717 | struct nfs4_state * |
| 718 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) |
| 719 | { |
| 720 | struct nfs4_state *state, *new; |
| 721 | struct nfs_inode *nfsi = NFS_I(inode); |
| 722 | |
| 723 | spin_lock(&inode->i_lock); |
| 724 | state = __nfs4_find_state_byowner(inode, owner); |
| 725 | spin_unlock(&inode->i_lock); |
| 726 | if (state) |
| 727 | goto out; |
| 728 | new = nfs4_alloc_open_state(); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 729 | spin_lock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | spin_lock(&inode->i_lock); |
| 731 | state = __nfs4_find_state_byowner(inode, owner); |
| 732 | if (state == NULL && new != NULL) { |
| 733 | state = new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | state->owner = owner; |
| 735 | atomic_inc(&owner->so_count); |
| 736 | list_add(&state->inode_states, &nfsi->open_states); |
Dave Chinner | 0444d76 | 2011-03-29 18:08:50 +1100 | [diff] [blame] | 737 | ihold(inode); |
| 738 | state->inode = inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 740 | /* Note: The reclaim code dictates that we add stateless |
| 741 | * and read-only stateids to the end of the list */ |
| 742 | list_add_tail(&state->open_states, &owner->so_states); |
| 743 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | } else { |
| 745 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 746 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | if (new) |
| 748 | nfs4_free_open_state(new); |
| 749 | } |
| 750 | out: |
| 751 | return state; |
| 752 | } |
| 753 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | void nfs4_put_open_state(struct nfs4_state *state) |
| 755 | { |
| 756 | struct inode *inode = state->inode; |
| 757 | struct nfs4_state_owner *owner = state->owner; |
| 758 | |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 759 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | return; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 761 | spin_lock(&inode->i_lock); |
Trond Myklebust | ba683031 | 2007-07-27 10:23:05 -0400 | [diff] [blame] | 762 | list_del(&state->inode_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | list_del(&state->open_states); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 764 | spin_unlock(&inode->i_lock); |
| 765 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | nfs4_free_open_state(state); |
| 768 | nfs4_put_state_owner(owner); |
| 769 | } |
| 770 | |
| 771 | /* |
Trond Myklebust | 83c9d41 | 2005-10-18 14:20:13 -0700 | [diff] [blame] | 772 | * Close the current file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | */ |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 774 | static void __nfs4_close(struct nfs4_state *state, |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 775 | fmode_t fmode, gfp_t gfp_mask, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | struct nfs4_state_owner *owner = state->owner; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 778 | int call_close = 0; |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 779 | fmode_t newstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
| 781 | atomic_inc(&owner->so_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | /* Protect against nfs4_find_state() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 783 | spin_lock(&owner->so_lock); |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 784 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 785 | case FMODE_READ: |
| 786 | state->n_rdonly--; |
| 787 | break; |
| 788 | case FMODE_WRITE: |
| 789 | state->n_wronly--; |
| 790 | break; |
| 791 | case FMODE_READ|FMODE_WRITE: |
| 792 | state->n_rdwr--; |
| 793 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 794 | newstate = FMODE_READ|FMODE_WRITE; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 795 | if (state->n_rdwr == 0) { |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 796 | if (state->n_rdonly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 797 | newstate &= ~FMODE_READ; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 798 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 799 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 800 | } |
| 801 | if (state->n_wronly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 802 | newstate &= ~FMODE_WRITE; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 803 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 804 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 805 | } |
| 806 | if (newstate == 0) |
| 807 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 808 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 809 | nfs4_state_set_mode_locked(state, newstate); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 810 | spin_unlock(&owner->so_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 811 | |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 812 | if (!call_close) { |
Trond Myklebust | b39e625 | 2007-06-11 23:05:07 -0400 | [diff] [blame] | 813 | nfs4_put_open_state(state); |
| 814 | nfs4_put_state_owner(owner); |
Trond Myklebust | 1f7977c | 2012-09-20 20:31:51 -0400 | [diff] [blame] | 815 | } else |
| 816 | nfs4_do_close(state, gfp_mask, wait); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 817 | } |
| 818 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 819 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 820 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 821 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 822 | } |
| 823 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 824 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 825 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 826 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | /* |
| 830 | * Search the state->lock_states for an existing lock_owner |
| 831 | * that is compatible with current->files |
| 832 | */ |
| 833 | static struct nfs4_lock_state * |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 834 | __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] | 835 | { |
| 836 | struct nfs4_lock_state *pos; |
| 837 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 838 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | continue; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 840 | switch (pos->ls_owner.lo_type) { |
| 841 | case NFS4_POSIX_LOCK_TYPE: |
| 842 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) |
| 843 | continue; |
| 844 | break; |
| 845 | case NFS4_FLOCK_LOCK_TYPE: |
| 846 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) |
| 847 | continue; |
| 848 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | atomic_inc(&pos->ls_count); |
| 850 | return pos; |
| 851 | } |
| 852 | return NULL; |
| 853 | } |
| 854 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | /* |
| 856 | * Return a compatible lock_state. If no initialized lock_state structure |
| 857 | * exists, return an uninitialized one. |
| 858 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 860 | 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] | 861 | { |
| 862 | struct nfs4_lock_state *lsp; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 863 | struct nfs_server *server = state->owner->so_server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 865 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | if (lsp == NULL) |
| 867 | return NULL; |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 868 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | atomic_set(&lsp->ls_count, 1); |
Trond Myklebust | b64aec8 | 2009-07-21 16:47:46 -0400 | [diff] [blame] | 870 | lsp->ls_state = state; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 871 | lsp->ls_owner.lo_type = type; |
| 872 | switch (lsp->ls_owner.lo_type) { |
| 873 | case NFS4_FLOCK_LOCK_TYPE: |
| 874 | lsp->ls_owner.lo_u.flock_owner = fl_pid; |
| 875 | break; |
| 876 | case NFS4_POSIX_LOCK_TYPE: |
| 877 | lsp->ls_owner.lo_u.posix_owner = fl_owner; |
| 878 | break; |
| 879 | default: |
Trond Myklebust | d2d7ce28 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 880 | goto out_free; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 881 | } |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 882 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
| 883 | if (lsp->ls_seqid.owner_id < 0) |
Trond Myklebust | d2d7ce28 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 884 | goto out_free; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 885 | INIT_LIST_HEAD(&lsp->ls_locks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | return lsp; |
Trond Myklebust | d2d7ce28 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 887 | out_free: |
| 888 | kfree(lsp); |
| 889 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | } |
| 891 | |
Trond Myklebust | 5ae67c4 | 2012-03-19 16:17:18 -0400 | [diff] [blame] | 892 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 893 | { |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 894 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 895 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 896 | kfree(lsp); |
| 897 | } |
| 898 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | /* |
| 900 | * Return a compatible lock_state. If no initialized lock_state structure |
| 901 | * exists, return an uninitialized one. |
| 902 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | */ |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 904 | 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] | 905 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 906 | struct nfs4_lock_state *lsp, *new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 908 | for(;;) { |
| 909 | spin_lock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 910 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 911 | if (lsp != NULL) |
| 912 | break; |
| 913 | if (new != NULL) { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 914 | list_add(&new->ls_locks, &state->lock_states); |
| 915 | set_bit(LK_STATE_IN_USE, &state->flags); |
| 916 | lsp = new; |
| 917 | new = NULL; |
| 918 | break; |
| 919 | } |
| 920 | spin_unlock(&state->state_lock); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 921 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 922 | if (new == NULL) |
| 923 | return NULL; |
| 924 | } |
| 925 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 926 | if (new != NULL) |
Trond Myklebust | 5ae67c4 | 2012-03-19 16:17:18 -0400 | [diff] [blame] | 927 | nfs4_free_lock_state(state->owner->so_server, new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | return lsp; |
| 929 | } |
| 930 | |
| 931 | /* |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 932 | * Release reference to lock_state, and free it if we see that |
| 933 | * it is no longer in use |
| 934 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 935 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 936 | { |
| 937 | struct nfs4_state *state; |
| 938 | |
| 939 | if (lsp == NULL) |
| 940 | return; |
| 941 | state = lsp->ls_state; |
| 942 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
| 943 | return; |
| 944 | list_del(&lsp->ls_locks); |
| 945 | if (list_empty(&state->lock_states)) |
| 946 | clear_bit(LK_STATE_IN_USE, &state->flags); |
| 947 | spin_unlock(&state->state_lock); |
Trond Myklebust | 795a88c | 2012-09-10 13:26:49 -0400 | [diff] [blame] | 948 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
Trond Myklebust | cf470c3 | 2012-03-07 13:49:12 -0500 | [diff] [blame] | 949 | if (nfs4_release_lockowner(lsp) == 0) |
| 950 | return; |
| 951 | } |
Trond Myklebust | 5ae67c4 | 2012-03-19 16:17:18 -0400 | [diff] [blame] | 952 | nfs4_free_lock_state(lsp->ls_state->owner->so_server, lsp); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 953 | } |
| 954 | |
| 955 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
| 956 | { |
| 957 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
| 958 | |
| 959 | dst->fl_u.nfs4_fl.owner = lsp; |
| 960 | atomic_inc(&lsp->ls_count); |
| 961 | } |
| 962 | |
| 963 | static void nfs4_fl_release_lock(struct file_lock *fl) |
| 964 | { |
| 965 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
| 966 | } |
| 967 | |
Alexey Dobriyan | 6aed628 | 2009-09-21 17:01:11 -0700 | [diff] [blame] | 968 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 969 | .fl_copy_lock = nfs4_fl_copy_lock, |
| 970 | .fl_release_private = nfs4_fl_release_lock, |
| 971 | }; |
| 972 | |
| 973 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
| 974 | { |
| 975 | struct nfs4_lock_state *lsp; |
| 976 | |
| 977 | if (fl->fl_ops != NULL) |
| 978 | return 0; |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 979 | if (fl->fl_flags & FL_POSIX) |
| 980 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); |
| 981 | else if (fl->fl_flags & FL_FLOCK) |
Trond Myklebust | 1728017 | 2012-03-11 13:11:00 -0400 | [diff] [blame] | 982 | lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, |
| 983 | NFS4_FLOCK_LOCK_TYPE); |
Trond Myklebust | 77041ed | 2010-07-01 12:49:11 -0400 | [diff] [blame] | 984 | else |
| 985 | return -EINVAL; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 986 | if (lsp == NULL) |
| 987 | return -ENOMEM; |
| 988 | fl->fl_u.nfs4_fl.owner = lsp; |
| 989 | fl->fl_ops = &nfs4_fl_lock_ops; |
| 990 | return 0; |
| 991 | } |
| 992 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 993 | static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 994 | const struct nfs_lockowner *lockowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 996 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 997 | fl_owner_t fl_owner; |
| 998 | pid_t fl_pid; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 999 | bool ret = false; |
| 1000 | |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 1001 | |
| 1002 | if (lockowner == NULL) |
| 1003 | goto out; |
| 1004 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1005 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
| 1006 | goto out; |
| 1007 | |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 1008 | fl_owner = lockowner->l_owner; |
| 1009 | fl_pid = lockowner->l_pid; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1010 | spin_lock(&state->state_lock); |
| 1011 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
Trond Myklebust | 795a88c | 2012-09-10 13:26:49 -0400 | [diff] [blame] | 1012 | if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1013 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
| 1014 | ret = true; |
| 1015 | } |
| 1016 | spin_unlock(&state->state_lock); |
| 1017 | nfs4_put_lock_state(lsp); |
| 1018 | out: |
| 1019 | return ret; |
| 1020 | } |
| 1021 | |
| 1022 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
| 1023 | { |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 1024 | int seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 1026 | do { |
| 1027 | seq = read_seqbegin(&state->seqlock); |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 1028 | nfs4_stateid_copy(dst, &state->stateid); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 1029 | } while (read_seqretry(&state->seqlock, seq)); |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1030 | } |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 1031 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1032 | /* |
| 1033 | * Byte-range lock aware utility to initialize the stateid of read/write |
| 1034 | * requests. |
| 1035 | */ |
| 1036 | void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 1037 | fmode_t fmode, const struct nfs_lockowner *lockowner) |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1038 | { |
| 1039 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) |
| 1040 | return; |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 1041 | if (nfs4_copy_lock_stateid(dst, state, lockowner)) |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1042 | return; |
| 1043 | nfs4_copy_open_stateid(dst, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | } |
| 1045 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1046 | 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] | 1047 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1048 | struct nfs_seqid *new; |
| 1049 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1050 | new = kmalloc(sizeof(*new), gfp_mask); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1051 | if (new != NULL) { |
| 1052 | new->sequence = counter; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1053 | INIT_LIST_HEAD(&new->list); |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1054 | new->task = NULL; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1055 | } |
| 1056 | return new; |
| 1057 | } |
| 1058 | |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 1059 | void nfs_release_seqid(struct nfs_seqid *seqid) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1060 | { |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1061 | struct nfs_seqid_counter *sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1062 | |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1063 | if (list_empty(&seqid->list)) |
| 1064 | return; |
| 1065 | sequence = seqid->sequence; |
| 1066 | spin_lock(&sequence->lock); |
| 1067 | list_del_init(&seqid->list); |
| 1068 | if (!list_empty(&sequence->list)) { |
| 1069 | struct nfs_seqid *next; |
| 1070 | |
| 1071 | next = list_first_entry(&sequence->list, |
| 1072 | struct nfs_seqid, list); |
| 1073 | rpc_wake_up_queued_task(&sequence->wait, next->task); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1074 | } |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1075 | spin_unlock(&sequence->lock); |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 1076 | } |
| 1077 | |
| 1078 | void nfs_free_seqid(struct nfs_seqid *seqid) |
| 1079 | { |
| 1080 | nfs_release_seqid(seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1081 | kfree(seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | } |
| 1083 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1085 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
| 1086 | * failed with a seqid incrementing error - |
| 1087 | * see comments nfs_fs.h:seqid_mutating_error() |
| 1088 | */ |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 1089 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1091 | switch (status) { |
| 1092 | case 0: |
| 1093 | break; |
| 1094 | case -NFS4ERR_BAD_SEQID: |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 1095 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
| 1096 | return; |
Trond Myklebust | 9a3ba43 | 2012-03-12 18:01:48 -0400 | [diff] [blame] | 1097 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
Dan Muntz | 497799e | 2008-02-13 13:09:35 -0800 | [diff] [blame] | 1098 | " sequence-id error on an" |
| 1099 | " unconfirmed sequence %p!\n", |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 1100 | seqid->sequence); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1101 | case -NFS4ERR_STALE_CLIENTID: |
| 1102 | case -NFS4ERR_STALE_STATEID: |
| 1103 | case -NFS4ERR_BAD_STATEID: |
| 1104 | case -NFS4ERR_BADXDR: |
| 1105 | case -NFS4ERR_RESOURCE: |
| 1106 | case -NFS4ERR_NOFILEHANDLE: |
| 1107 | /* Non-seqid mutating errors */ |
| 1108 | return; |
| 1109 | }; |
| 1110 | /* |
| 1111 | * Note: no locking needed as we are guaranteed to be first |
| 1112 | * on the sequence list |
| 1113 | */ |
| 1114 | seqid->sequence->counter++; |
| 1115 | } |
| 1116 | |
| 1117 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) |
| 1118 | { |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1119 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
| 1120 | struct nfs4_state_owner, so_seqid); |
| 1121 | struct nfs_server *server = sp->so_server; |
| 1122 | |
| 1123 | if (status == -NFS4ERR_BAD_SEQID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | nfs4_drop_state_owner(sp); |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1125 | if (!nfs4_has_session(server->nfs_client)) |
| 1126 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1130 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
| 1131 | * failed with a seqid incrementing error - |
| 1132 | * see comments nfs_fs.h:seqid_mutating_error() |
| 1133 | */ |
| 1134 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) |
| 1135 | { |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 1136 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1137 | } |
| 1138 | |
| 1139 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) |
| 1140 | { |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 1141 | struct nfs_seqid_counter *sequence = seqid->sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1142 | int status = 0; |
| 1143 | |
| 1144 | spin_lock(&sequence->lock); |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1145 | seqid->task = task; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1146 | if (list_empty(&seqid->list)) |
| 1147 | list_add_tail(&seqid->list, &sequence->list); |
| 1148 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) |
| 1149 | goto unlock; |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 1150 | rpc_sleep_on(&sequence->wait, task, NULL); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1151 | status = -EAGAIN; |
| 1152 | unlock: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1153 | spin_unlock(&sequence->lock); |
| 1154 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | } |
| 1156 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1157 | static int nfs4_run_state_manager(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1159 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1160 | { |
| 1161 | smp_mb__before_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1162 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1163 | smp_mb__after_clear_bit(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1164 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1165 | rpc_wake_up(&clp->cl_rpcwaitq); |
| 1166 | } |
| 1167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | /* |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1169 | * Schedule the nfs_client asynchronous state management routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | */ |
Trond Myklebust | b0d3ded | 2008-12-23 15:21:50 -0500 | [diff] [blame] | 1171 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | { |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1173 | struct task_struct *task; |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1174 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1176 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1177 | return; |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1178 | __module_get(THIS_MODULE); |
| 1179 | atomic_inc(&clp->cl_count); |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1180 | |
| 1181 | /* The rcu_read_lock() is not strictly necessary, as the state |
| 1182 | * manager is the only thread that ever changes the rpc_xprt |
| 1183 | * after it's initialized. At this point, we're single threaded. */ |
| 1184 | rcu_read_lock(); |
| 1185 | snprintf(buf, sizeof(buf), "%s-manager", |
| 1186 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
| 1187 | rcu_read_unlock(); |
| 1188 | task = kthread_run(nfs4_run_state_manager, clp, buf); |
| 1189 | if (IS_ERR(task)) { |
| 1190 | printk(KERN_ERR "%s: kthread_run: %ld\n", |
| 1191 | __func__, PTR_ERR(task)); |
| 1192 | nfs4_clear_state_manager_bit(clp); |
| 1193 | nfs_put_client(clp); |
| 1194 | module_put(THIS_MODULE); |
| 1195 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | } |
| 1197 | |
| 1198 | /* |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1199 | * Schedule a lease recovery attempt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | */ |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1201 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | { |
| 1203 | if (!clp) |
| 1204 | return; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1205 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1206 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1207 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
| 1208 | clp->cl_hostname); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1209 | nfs4_schedule_state_manager(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | } |
Andy Adamson | 9cb8196 | 2012-03-07 10:49:41 -0500 | [diff] [blame] | 1211 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1213 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
| 1214 | { |
| 1215 | int res; |
| 1216 | |
| 1217 | might_sleep(); |
| 1218 | |
| 1219 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
| 1220 | nfs_wait_bit_killable, TASK_KILLABLE); |
| 1221 | if (res) |
| 1222 | return res; |
| 1223 | |
| 1224 | if (clp->cl_cons_state < 0) |
| 1225 | return clp->cl_cons_state; |
| 1226 | return 0; |
| 1227 | } |
| 1228 | |
| 1229 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) |
| 1230 | { |
| 1231 | unsigned int loop; |
| 1232 | int ret; |
| 1233 | |
| 1234 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
| 1235 | ret = nfs4_wait_clnt_recover(clp); |
| 1236 | if (ret != 0) |
| 1237 | break; |
| 1238 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
| 1239 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) |
| 1240 | break; |
| 1241 | nfs4_schedule_state_manager(clp); |
| 1242 | ret = -EIO; |
| 1243 | } |
| 1244 | return ret; |
| 1245 | } |
| 1246 | |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1247 | /* |
| 1248 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN |
| 1249 | * @clp: client to process |
| 1250 | * |
| 1251 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a |
| 1252 | * resend of the SETCLIENTID and hence re-establish the |
| 1253 | * callback channel. Then return all existing delegations. |
| 1254 | */ |
| 1255 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) |
| 1256 | { |
| 1257 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1258 | nfs_expire_all_delegations(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1259 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
| 1260 | clp->cl_hostname); |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1261 | } |
| 1262 | |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1263 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
| 1264 | { |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1265 | nfs40_handle_cb_pathdown(clp); |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1266 | nfs4_schedule_state_manager(clp); |
| 1267 | } |
| 1268 | |
Trond Myklebust | f9feab1 | 2011-03-09 16:12:46 -0500 | [diff] [blame] | 1269 | 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] | 1270 | { |
| 1271 | |
| 1272 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1273 | /* Don't recover state that expired before the reboot */ |
| 1274 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { |
| 1275 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1276 | return 0; |
| 1277 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1278 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1279 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 1280 | return 1; |
| 1281 | } |
| 1282 | |
Trond Myklebust | f9feab1 | 2011-03-09 16:12:46 -0500 | [diff] [blame] | 1283 | 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] | 1284 | { |
| 1285 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 1286 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1287 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1288 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
| 1289 | return 1; |
| 1290 | } |
| 1291 | |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1292 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
| 1293 | { |
| 1294 | struct nfs_client *clp = server->nfs_client; |
| 1295 | |
| 1296 | nfs4_state_mark_reclaim_nograce(clp, state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1297 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
| 1298 | clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1299 | nfs4_schedule_state_manager(clp); |
| 1300 | } |
Andy Adamson | 9cb8196 | 2012-03-07 10:49:41 -0500 | [diff] [blame] | 1301 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1302 | |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1303 | void nfs_inode_find_state_and_recover(struct inode *inode, |
| 1304 | const nfs4_stateid *stateid) |
| 1305 | { |
| 1306 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; |
| 1307 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1308 | struct nfs_open_context *ctx; |
| 1309 | struct nfs4_state *state; |
| 1310 | bool found = false; |
| 1311 | |
| 1312 | spin_lock(&inode->i_lock); |
| 1313 | list_for_each_entry(ctx, &nfsi->open_files, list) { |
| 1314 | state = ctx->state; |
| 1315 | if (state == NULL) |
| 1316 | continue; |
| 1317 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| 1318 | continue; |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 1319 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1320 | continue; |
| 1321 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1322 | found = true; |
| 1323 | } |
| 1324 | spin_unlock(&inode->i_lock); |
| 1325 | if (found) |
| 1326 | nfs4_schedule_state_manager(clp); |
| 1327 | } |
| 1328 | |
| 1329 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1330 | 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] | 1331 | { |
| 1332 | struct inode *inode = state->inode; |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1333 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | struct file_lock *fl; |
| 1335 | int status = 0; |
| 1336 | |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1337 | if (inode->i_flock == NULL) |
| 1338 | return 0; |
| 1339 | |
| 1340 | /* Guard against delegation returns and new lock/unlock calls */ |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1341 | down_write(&nfsi->rwsem); |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1342 | /* Protect inode->i_flock using the BKL */ |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1343 | lock_flocks(); |
Harvey Harrison | 90dc7d2 | 2008-02-20 13:03:05 -0800 | [diff] [blame] | 1344 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 1345 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | continue; |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 1347 | if (nfs_file_open_context(fl->fl_file)->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | continue; |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1349 | unlock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | status = ops->recover_lock(state, fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | switch (status) { |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1352 | case 0: |
| 1353 | break; |
| 1354 | case -ESTALE: |
| 1355 | case -NFS4ERR_ADMIN_REVOKED: |
| 1356 | case -NFS4ERR_STALE_STATEID: |
| 1357 | case -NFS4ERR_BAD_STATEID: |
| 1358 | case -NFS4ERR_EXPIRED: |
| 1359 | case -NFS4ERR_NO_GRACE: |
| 1360 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1361 | case -NFS4ERR_BADSESSION: |
| 1362 | case -NFS4ERR_BADSLOT: |
| 1363 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1364 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1365 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | default: |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 1367 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
| 1368 | "Zeroing state\n", __func__, status); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1369 | case -ENOMEM: |
| 1370 | case -NFS4ERR_DENIED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | case -NFS4ERR_RECLAIM_BAD: |
| 1372 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 43b2a33 | 2005-11-04 15:35:30 -0500 | [diff] [blame] | 1373 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1374 | status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | } |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1376 | lock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | } |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 1378 | unlock_flocks(); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1379 | out: |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1380 | up_write(&nfsi->rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | return status; |
| 1382 | } |
| 1383 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1384 | 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] | 1385 | { |
| 1386 | struct nfs4_state *state; |
| 1387 | struct nfs4_lock_state *lock; |
| 1388 | int status = 0; |
| 1389 | |
| 1390 | /* Note: we rely on the sp->so_states list being ordered |
| 1391 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) |
| 1392 | * states first. |
| 1393 | * This is needed to ensure that the server won't give us any |
| 1394 | * read delegations that we have to return if, say, we are |
| 1395 | * recovering after a network partition or a reboot from a |
| 1396 | * server that doesn't support a grace period. |
| 1397 | */ |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1398 | restart: |
| 1399 | spin_lock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1401 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
| 1402 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | if (state->state == 0) |
| 1404 | continue; |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1405 | atomic_inc(&state->count); |
| 1406 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | status = ops->recover_open(sp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | if (status >= 0) { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1409 | status = nfs4_reclaim_locks(state, ops); |
| 1410 | if (status >= 0) { |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1411 | spin_lock(&state->state_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1412 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | 795a88c | 2012-09-10 13:26:49 -0400 | [diff] [blame] | 1413 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
William Dauchy | 96dcadc | 2012-03-14 12:32:04 +0100 | [diff] [blame] | 1414 | pr_warn_ratelimited("NFS: " |
| 1415 | "%s: Lock reclaim " |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 1416 | "failed!\n", __func__); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1417 | } |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1418 | spin_unlock(&state->state_lock); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1419 | nfs4_put_open_state(state); |
| 1420 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | } |
| 1423 | switch (status) { |
| 1424 | default: |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 1425 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
| 1426 | "Zeroing state\n", __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | case -ENOENT: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1428 | case -ENOMEM: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1429 | case -ESTALE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | /* |
| 1431 | * Open state on this file cannot be recovered |
| 1432 | * All we can do is revert to using the zero stateid. |
| 1433 | */ |
Trond Myklebust | 2d2f24a | 2012-03-04 18:13:57 -0500 | [diff] [blame] | 1434 | memset(&state->stateid, 0, |
| 1435 | sizeof(state->stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | /* Mark the file as being 'closed' */ |
| 1437 | state->state = 0; |
| 1438 | break; |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1439 | case -NFS4ERR_ADMIN_REVOKED: |
| 1440 | case -NFS4ERR_STALE_STATEID: |
| 1441 | case -NFS4ERR_BAD_STATEID: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1442 | case -NFS4ERR_RECLAIM_BAD: |
| 1443 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1444 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1445 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | case -NFS4ERR_EXPIRED: |
| 1447 | case -NFS4ERR_NO_GRACE: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1448 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1450 | case -NFS4ERR_BADSESSION: |
| 1451 | case -NFS4ERR_BADSLOT: |
| 1452 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1453 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | goto out_err; |
| 1455 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1456 | nfs4_put_open_state(state); |
| 1457 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1459 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | return 0; |
| 1461 | out_err: |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1462 | nfs4_put_open_state(state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | return status; |
| 1464 | } |
| 1465 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1466 | static void nfs4_clear_open_state(struct nfs4_state *state) |
| 1467 | { |
| 1468 | struct nfs4_lock_state *lock; |
| 1469 | |
| 1470 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1471 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1472 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1473 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1474 | spin_lock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1475 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1476 | lock->ls_seqid.flags = 0; |
Trond Myklebust | 795a88c | 2012-09-10 13:26:49 -0400 | [diff] [blame] | 1477 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1478 | } |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1479 | spin_unlock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1480 | } |
| 1481 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1482 | static void nfs4_reset_seqids(struct nfs_server *server, |
| 1483 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1484 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1485 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1486 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1487 | struct rb_node *pos; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1488 | struct nfs4_state *state; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1489 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1490 | spin_lock(&clp->cl_lock); |
| 1491 | for (pos = rb_first(&server->state_owners); |
| 1492 | pos != NULL; |
| 1493 | pos = rb_next(pos)) { |
| 1494 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1495 | sp->so_seqid.flags = 0; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1496 | spin_lock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1497 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1498 | if (mark_reclaim(clp, state)) |
| 1499 | nfs4_clear_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1500 | } |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1501 | spin_unlock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1502 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1503 | spin_unlock(&clp->cl_lock); |
| 1504 | } |
| 1505 | |
| 1506 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, |
| 1507 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
| 1508 | { |
| 1509 | struct nfs_server *server; |
| 1510 | |
| 1511 | rcu_read_lock(); |
| 1512 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1513 | nfs4_reset_seqids(server, mark_reclaim); |
| 1514 | rcu_read_unlock(); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1515 | } |
| 1516 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1517 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
| 1518 | { |
| 1519 | /* Mark all delegations for reclaim */ |
| 1520 | nfs_delegation_mark_reclaim(clp); |
| 1521 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); |
| 1522 | } |
| 1523 | |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1524 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
| 1525 | const struct nfs4_state_recovery_ops *ops) |
| 1526 | { |
| 1527 | /* Notify the server we're done reclaiming our state */ |
| 1528 | if (ops->reclaim_complete) |
| 1529 | (void)ops->reclaim_complete(clp); |
| 1530 | } |
| 1531 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1532 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1533 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1534 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1535 | struct nfs4_state_owner *sp; |
| 1536 | struct rb_node *pos; |
| 1537 | struct nfs4_state *state; |
| 1538 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1539 | spin_lock(&clp->cl_lock); |
| 1540 | for (pos = rb_first(&server->state_owners); |
| 1541 | pos != NULL; |
| 1542 | pos = rb_next(pos)) { |
| 1543 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1544 | spin_lock(&sp->so_lock); |
| 1545 | list_for_each_entry(state, &sp->so_states, open_states) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1546 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
| 1547 | &state->flags)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1548 | continue; |
| 1549 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1550 | } |
| 1551 | spin_unlock(&sp->so_lock); |
| 1552 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1553 | spin_unlock(&clp->cl_lock); |
| 1554 | } |
| 1555 | |
| 1556 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
| 1557 | { |
| 1558 | struct nfs_server *server; |
| 1559 | |
| 1560 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1561 | return 0; |
| 1562 | |
| 1563 | rcu_read_lock(); |
| 1564 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1565 | nfs4_clear_reclaim_server(server); |
| 1566 | rcu_read_unlock(); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1567 | |
| 1568 | nfs_delegation_reap_unclaimed(clp); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1569 | return 1; |
| 1570 | } |
| 1571 | |
| 1572 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
| 1573 | { |
| 1574 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
| 1575 | return; |
| 1576 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1577 | } |
| 1578 | |
| 1579 | static void nfs_delegation_clear_all(struct nfs_client *clp) |
| 1580 | { |
| 1581 | nfs_delegation_mark_reclaim(clp); |
| 1582 | nfs_delegation_reap_unclaimed(clp); |
| 1583 | } |
| 1584 | |
| 1585 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
| 1586 | { |
| 1587 | nfs_delegation_clear_all(clp); |
| 1588 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 1589 | } |
| 1590 | |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1591 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1592 | { |
| 1593 | switch (error) { |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1594 | case 0: |
| 1595 | break; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1596 | case -NFS4ERR_CB_PATH_DOWN: |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1597 | nfs40_handle_cb_pathdown(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1598 | break; |
Trond Myklebust | c8b7ae3d | 2009-12-03 15:53:21 -0500 | [diff] [blame] | 1599 | case -NFS4ERR_NO_GRACE: |
| 1600 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1601 | break; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1602 | case -NFS4ERR_STALE_CLIENTID: |
| 1603 | case -NFS4ERR_LEASE_MOVED: |
| 1604 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1605 | nfs4_state_clear_reclaim_reboot(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1606 | nfs4_state_start_reclaim_reboot(clp); |
| 1607 | break; |
| 1608 | case -NFS4ERR_EXPIRED: |
| 1609 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1610 | nfs4_state_start_reclaim_nograce(clp); |
Andy Adamson | 8ba9bf8 | 2009-12-04 15:55:34 -0500 | [diff] [blame] | 1611 | break; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1612 | case -NFS4ERR_BADSESSION: |
| 1613 | case -NFS4ERR_BADSLOT: |
| 1614 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1615 | case -NFS4ERR_DEADSESSION: |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1616 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 1617 | case -NFS4ERR_SEQ_MISORDERED: |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1618 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 0b9e2d4 | 2009-12-04 16:02:14 -0500 | [diff] [blame] | 1619 | /* Zero session reset errors */ |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1620 | break; |
Trond Myklebust | 7c5d725 | 2012-05-27 12:58:48 -0400 | [diff] [blame] | 1621 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1622 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 1623 | break; |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1624 | default: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1625 | dprintk("%s: failed to handle error %d for server %s\n", |
| 1626 | __func__, error, clp->cl_hostname); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1627 | return error; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1628 | } |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1629 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
| 1630 | clp->cl_hostname); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1631 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1632 | } |
| 1633 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1634 | 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] | 1635 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1636 | struct nfs4_state_owner *sp; |
| 1637 | struct nfs_server *server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1638 | struct rb_node *pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | int status = 0; |
| 1640 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1641 | restart: |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1642 | rcu_read_lock(); |
| 1643 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 1644 | nfs4_purge_state_owners(server); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1645 | spin_lock(&clp->cl_lock); |
| 1646 | for (pos = rb_first(&server->state_owners); |
| 1647 | pos != NULL; |
| 1648 | pos = rb_next(pos)) { |
| 1649 | sp = rb_entry(pos, |
| 1650 | struct nfs4_state_owner, so_server_node); |
| 1651 | if (!test_and_clear_bit(ops->owner_flag_bit, |
| 1652 | &sp->so_flags)) |
| 1653 | continue; |
| 1654 | atomic_inc(&sp->so_count); |
| 1655 | spin_unlock(&clp->cl_lock); |
| 1656 | rcu_read_unlock(); |
| 1657 | |
| 1658 | status = nfs4_reclaim_open_state(sp, ops); |
| 1659 | if (status < 0) { |
| 1660 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
| 1661 | nfs4_put_state_owner(sp); |
| 1662 | return nfs4_recovery_handle_error(clp, status); |
| 1663 | } |
| 1664 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1665 | nfs4_put_state_owner(sp); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1666 | goto restart; |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1667 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1668 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1669 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1670 | rcu_read_unlock(); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1671 | return status; |
| 1672 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1674 | static int nfs4_check_lease(struct nfs_client *clp) |
| 1675 | { |
| 1676 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1677 | const struct nfs4_state_maintenance_ops *ops = |
| 1678 | clp->cl_mvops->state_renewal_ops; |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1679 | int status; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1680 | |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1681 | /* Is the client already known to have an expired lease? */ |
| 1682 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1683 | return 0; |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 1684 | spin_lock(&clp->cl_lock); |
| 1685 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1686 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1687 | if (cred == NULL) { |
| 1688 | cred = nfs4_get_setclientid_cred(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1689 | status = -ENOKEY; |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1690 | if (cred == NULL) |
| 1691 | goto out; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1692 | } |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1693 | status = ops->renew_lease(clp, cred); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1694 | put_rpccred(cred); |
| 1695 | out: |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1696 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1697 | } |
| 1698 | |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1699 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
| 1700 | * and for recoverable errors on EXCHANGE_ID for v4.1 |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1701 | */ |
| 1702 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) |
| 1703 | { |
| 1704 | switch (status) { |
Trond Myklebust | 89a2173 | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1705 | case -NFS4ERR_SEQ_MISORDERED: |
| 1706 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) |
| 1707 | return -ESERVERFAULT; |
| 1708 | /* Lease confirmation error: retry after purging the lease */ |
| 1709 | ssleep(1); |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1710 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 1711 | break; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1712 | case -NFS4ERR_STALE_CLIENTID: |
| 1713 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1714 | nfs4_state_clear_reclaim_reboot(clp); |
| 1715 | nfs4_state_start_reclaim_reboot(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1716 | break; |
Chuck Lever | de73483 | 2012-07-11 16:30:50 -0400 | [diff] [blame] | 1717 | case -NFS4ERR_CLID_INUSE: |
| 1718 | pr_err("NFS: Server %s reports our clientid is in use\n", |
| 1719 | clp->cl_hostname); |
| 1720 | nfs_mark_client_ready(clp, -EPERM); |
| 1721 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 1722 | return -EPERM; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1723 | case -EACCES: |
| 1724 | if (clp->cl_machine_cred == NULL) |
| 1725 | return -EACCES; |
| 1726 | /* Handle case where the user hasn't set up machine creds */ |
| 1727 | nfs4_clear_machine_cred(clp); |
| 1728 | case -NFS4ERR_DELAY: |
| 1729 | case -ETIMEDOUT: |
| 1730 | case -EAGAIN: |
| 1731 | ssleep(1); |
| 1732 | break; |
| 1733 | |
| 1734 | case -NFS4ERR_MINOR_VERS_MISMATCH: |
| 1735 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) |
| 1736 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1737 | dprintk("%s: exit with error %d for server %s\n", |
| 1738 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1739 | return -EPROTONOSUPPORT; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1740 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 1741 | * in nfs4_exchange_id */ |
| 1742 | default: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1743 | dprintk("%s: exit with error %d for server %s\n", __func__, |
| 1744 | status, clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1745 | return status; |
| 1746 | } |
| 1747 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1748 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
| 1749 | clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1750 | return 0; |
| 1751 | } |
| 1752 | |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1753 | static int nfs4_establish_lease(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1754 | { |
| 1755 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1756 | const struct nfs4_state_recovery_ops *ops = |
| 1757 | clp->cl_mvops->reboot_recovery_ops; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1758 | int status; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1759 | |
Andy Adamson | 90a1661 | 2009-04-01 09:22:48 -0400 | [diff] [blame] | 1760 | cred = ops->get_clid_cred(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1761 | if (cred == NULL) |
| 1762 | return -ENOENT; |
| 1763 | status = ops->establish_clid(clp, cred); |
| 1764 | put_rpccred(cred); |
| 1765 | if (status != 0) |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1766 | return status; |
| 1767 | pnfs_destroy_all_layouts(clp); |
| 1768 | return 0; |
| 1769 | } |
| 1770 | |
Chuck Lever | 6bbb4ae | 2012-07-11 16:30:59 -0400 | [diff] [blame] | 1771 | /* |
| 1772 | * Returns zero or a negative errno. NFS4ERR values are converted |
| 1773 | * to local errno values. |
| 1774 | */ |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1775 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
| 1776 | { |
| 1777 | int status; |
| 1778 | |
| 1779 | status = nfs4_establish_lease(clp); |
| 1780 | if (status < 0) |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1781 | return nfs4_handle_reclaim_lease_error(clp, status); |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1782 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) |
| 1783 | nfs4_state_start_reclaim_nograce(clp); |
| 1784 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 1785 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 1786 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 1787 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1788 | return 0; |
| 1789 | } |
| 1790 | |
| 1791 | static int nfs4_purge_lease(struct nfs_client *clp) |
| 1792 | { |
| 1793 | int status; |
| 1794 | |
| 1795 | status = nfs4_establish_lease(clp); |
| 1796 | if (status < 0) |
| 1797 | return nfs4_handle_reclaim_lease_error(clp, status); |
| 1798 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
| 1799 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1800 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1801 | return 0; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1802 | } |
| 1803 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 1804 | /** |
| 1805 | * nfs4_discover_server_trunking - Detect server IP address trunking |
| 1806 | * |
| 1807 | * @clp: nfs_client under test |
| 1808 | * @result: OUT: found nfs_client, or clp |
| 1809 | * |
| 1810 | * Returns zero or a negative errno. If zero is returned, |
| 1811 | * an nfs_client pointer is planted in "result". |
| 1812 | * |
| 1813 | * Note: since we are invoked in process context, and |
| 1814 | * not from inside the state manager, we cannot use |
| 1815 | * nfs4_handle_reclaim_lease_error(). |
| 1816 | */ |
| 1817 | int nfs4_discover_server_trunking(struct nfs_client *clp, |
| 1818 | struct nfs_client **result) |
| 1819 | { |
| 1820 | const struct nfs4_state_recovery_ops *ops = |
| 1821 | clp->cl_mvops->reboot_recovery_ops; |
| 1822 | rpc_authflavor_t *flavors, flav, save; |
| 1823 | struct rpc_clnt *clnt; |
| 1824 | struct rpc_cred *cred; |
| 1825 | int i, len, status; |
| 1826 | |
| 1827 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); |
| 1828 | |
| 1829 | len = NFS_MAX_SECFLAVORS; |
| 1830 | flavors = kcalloc(len, sizeof(*flavors), GFP_KERNEL); |
| 1831 | if (flavors == NULL) { |
| 1832 | status = -ENOMEM; |
| 1833 | goto out; |
| 1834 | } |
| 1835 | len = rpcauth_list_flavors(flavors, len); |
| 1836 | if (len < 0) { |
| 1837 | status = len; |
| 1838 | goto out_free; |
| 1839 | } |
| 1840 | clnt = clp->cl_rpcclient; |
| 1841 | save = clnt->cl_auth->au_flavor; |
| 1842 | i = 0; |
| 1843 | |
| 1844 | mutex_lock(&nfs_clid_init_mutex); |
| 1845 | status = -ENOENT; |
| 1846 | again: |
| 1847 | cred = ops->get_clid_cred(clp); |
| 1848 | if (cred == NULL) |
| 1849 | goto out_unlock; |
| 1850 | |
| 1851 | status = ops->detect_trunking(clp, result, cred); |
| 1852 | put_rpccred(cred); |
| 1853 | switch (status) { |
| 1854 | case 0: |
| 1855 | break; |
| 1856 | |
| 1857 | case -EACCES: |
| 1858 | if (clp->cl_machine_cred == NULL) |
| 1859 | break; |
| 1860 | /* Handle case where the user hasn't set up machine creds */ |
| 1861 | nfs4_clear_machine_cred(clp); |
| 1862 | case -NFS4ERR_DELAY: |
| 1863 | case -ETIMEDOUT: |
| 1864 | case -EAGAIN: |
| 1865 | ssleep(1); |
| 1866 | dprintk("NFS: %s after status %d, retrying\n", |
| 1867 | __func__, status); |
| 1868 | goto again; |
| 1869 | |
| 1870 | case -NFS4ERR_CLID_INUSE: |
| 1871 | case -NFS4ERR_WRONGSEC: |
| 1872 | status = -EPERM; |
| 1873 | if (i >= len) |
| 1874 | break; |
| 1875 | |
| 1876 | flav = flavors[i++]; |
| 1877 | if (flav == save) |
| 1878 | flav = flavors[i++]; |
| 1879 | clnt = rpc_clone_client_set_auth(clnt, flav); |
| 1880 | if (IS_ERR(clnt)) { |
| 1881 | status = PTR_ERR(clnt); |
| 1882 | break; |
| 1883 | } |
| 1884 | clp->cl_rpcclient = clnt; |
| 1885 | goto again; |
| 1886 | |
| 1887 | case -NFS4ERR_MINOR_VERS_MISMATCH: |
| 1888 | status = -EPROTONOSUPPORT; |
| 1889 | break; |
| 1890 | |
| 1891 | case -EKEYEXPIRED: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 1892 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 1893 | * in nfs4_exchange_id */ |
| 1894 | status = -EKEYEXPIRED; |
| 1895 | } |
| 1896 | |
| 1897 | out_unlock: |
| 1898 | mutex_unlock(&nfs_clid_init_mutex); |
| 1899 | out_free: |
| 1900 | kfree(flavors); |
| 1901 | out: |
| 1902 | dprintk("NFS: %s: status = %d\n", __func__, status); |
| 1903 | return status; |
| 1904 | } |
| 1905 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 1906 | #ifdef CONFIG_NFS_V4_1 |
Trond Myklebust | 9f59479 | 2012-05-27 13:02:53 -0400 | [diff] [blame] | 1907 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1908 | { |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 1909 | struct nfs_client *clp = session->clp; |
| 1910 | |
Trond Myklebust | 9f59479 | 2012-05-27 13:02:53 -0400 | [diff] [blame] | 1911 | switch (err) { |
| 1912 | default: |
| 1913 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 1914 | break; |
| 1915 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1916 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 1917 | } |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 1918 | nfs4_schedule_lease_recovery(clp); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1919 | } |
Andy Adamson | cbdabc7 | 2011-03-01 01:34:20 +0000 | [diff] [blame] | 1920 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1921 | |
Trond Myklebust | ac07483 | 2012-11-21 09:06:11 -0500 | [diff] [blame] | 1922 | static void nfs41_ping_server(struct nfs_client *clp) |
| 1923 | { |
| 1924 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ |
| 1925 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 1926 | nfs4_schedule_state_manager(clp); |
| 1927 | } |
| 1928 | |
| 1929 | void nfs41_server_notify_target_slotid_update(struct nfs_client *clp) |
| 1930 | { |
| 1931 | nfs41_ping_server(clp); |
| 1932 | } |
| 1933 | |
Trond Myklebust | c10e449 | 2012-11-26 16:16:54 -0500 | [diff] [blame] | 1934 | void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp) |
| 1935 | { |
| 1936 | nfs41_ping_server(clp); |
| 1937 | } |
| 1938 | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1939 | static void nfs4_reset_all_state(struct nfs_client *clp) |
| 1940 | { |
| 1941 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 1942 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
Trond Myklebust | be0bfed | 2012-05-25 16:02:15 -0400 | [diff] [blame] | 1943 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1944 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1945 | dprintk("%s: scheduling reset of all state for server %s!\n", |
| 1946 | __func__, clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1947 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1948 | } |
| 1949 | } |
| 1950 | |
| 1951 | static void nfs41_handle_server_reboot(struct nfs_client *clp) |
| 1952 | { |
| 1953 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 1954 | nfs4_state_start_reclaim_reboot(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1955 | dprintk("%s: server %s rebooted!\n", __func__, |
| 1956 | clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1957 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1958 | } |
| 1959 | } |
| 1960 | |
| 1961 | static void nfs41_handle_state_revoked(struct nfs_client *clp) |
| 1962 | { |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1963 | nfs4_reset_all_state(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1964 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1965 | } |
| 1966 | |
| 1967 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
| 1968 | { |
| 1969 | /* This will need to handle layouts too */ |
| 1970 | nfs_expire_all_delegations(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1971 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
| 1972 | clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1973 | } |
| 1974 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 1975 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1976 | { |
| 1977 | nfs_expire_all_delegations(clp); |
| 1978 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1979 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1980 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
| 1981 | clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 1982 | } |
| 1983 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 1984 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
| 1985 | { |
| 1986 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, |
| 1987 | &clp->cl_state) == 0) |
| 1988 | nfs4_schedule_state_manager(clp); |
| 1989 | } |
| 1990 | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 1991 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
| 1992 | { |
| 1993 | if (!flags) |
| 1994 | return; |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 1995 | |
| 1996 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", |
| 1997 | __func__, clp->cl_hostname, clp->cl_clientid, flags); |
| 1998 | |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 1999 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2000 | nfs41_handle_server_reboot(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 2001 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 2002 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
| 2003 | SEQ4_STATUS_ADMIN_STATE_REVOKED | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2004 | SEQ4_STATUS_LEASE_MOVED)) |
| 2005 | nfs41_handle_state_revoked(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 2006 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2007 | nfs41_handle_recallable_state_revoked(clp); |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2008 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
| 2009 | nfs41_handle_backchannel_fault(clp); |
| 2010 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
| 2011 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2012 | nfs41_handle_cb_path_down(clp); |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 2013 | } |
| 2014 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2015 | static int nfs4_reset_session(struct nfs_client *clp) |
| 2016 | { |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2017 | struct rpc_cred *cred; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2018 | int status; |
| 2019 | |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2020 | if (!nfs4_has_session(clp)) |
| 2021 | return 0; |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 2022 | nfs4_begin_drain_session(clp); |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2023 | cred = nfs4_get_exchange_id_cred(clp); |
| 2024 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2025 | if (status && status != -NFS4ERR_BADSESSION && |
| 2026 | status != -NFS4ERR_DEADSESSION) { |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 2027 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2028 | goto out; |
| 2029 | } |
| 2030 | |
| 2031 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2032 | status = nfs4_proc_create_session(clp, cred); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2033 | if (status) { |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2034 | dprintk("%s: session reset failed with status %d for server %s!\n", |
| 2035 | __func__, status, clp->cl_hostname); |
Trond Myklebust | f2c1b51 | 2012-05-27 14:46:46 -0400 | [diff] [blame] | 2036 | status = nfs4_handle_reclaim_lease_error(clp, status); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2037 | goto out; |
| 2038 | } |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 2039 | nfs41_finish_session_reset(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2040 | dprintk("%s: session reset was successful for server %s!\n", |
| 2041 | __func__, clp->cl_hostname); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2042 | out: |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2043 | if (cred) |
| 2044 | put_rpccred(cred); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2045 | return status; |
| 2046 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2047 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2048 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
| 2049 | { |
Trond Myklebust | 2cf047c | 2012-05-25 17:57:41 -0400 | [diff] [blame] | 2050 | struct rpc_cred *cred; |
| 2051 | int ret; |
| 2052 | |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2053 | if (!nfs4_has_session(clp)) |
| 2054 | return 0; |
Trond Myklebust | 43ac544 | 2012-05-27 13:47:21 -0400 | [diff] [blame] | 2055 | nfs4_begin_drain_session(clp); |
Trond Myklebust | 2cf047c | 2012-05-25 17:57:41 -0400 | [diff] [blame] | 2056 | cred = nfs4_get_exchange_id_cred(clp); |
| 2057 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
| 2058 | if (cred) |
| 2059 | put_rpccred(cred); |
Trond Myklebust | 43ac544 | 2012-05-27 13:47:21 -0400 | [diff] [blame] | 2060 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2061 | switch (ret) { |
| 2062 | case 0: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2063 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
| 2064 | __func__, clp->cl_hostname); |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2065 | break; |
| 2066 | case -NFS4ERR_DELAY: |
| 2067 | ssleep(1); |
| 2068 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 2069 | break; |
| 2070 | default: |
| 2071 | return nfs4_recovery_handle_error(clp, ret); |
| 2072 | } |
| 2073 | return 0; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2074 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2075 | #else /* CONFIG_NFS_V4_1 */ |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2076 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 2077 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2078 | |
| 2079 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
| 2080 | { |
| 2081 | return 0; |
| 2082 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2083 | #endif /* CONFIG_NFS_V4_1 */ |
| 2084 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2085 | static void nfs4_state_manager(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2086 | { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2087 | int status = 0; |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2088 | const char *section = "", *section_sep = ""; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2089 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2090 | /* Ensure exclusive access to NFSv4 state */ |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 2091 | do { |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2092 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2093 | section = "purge state"; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2094 | status = nfs4_purge_lease(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2095 | if (status < 0) |
| 2096 | goto out_error; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2097 | continue; |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2098 | } |
| 2099 | |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2100 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2101 | section = "lease expired"; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2102 | /* We're going to have to re-establish a clientid */ |
| 2103 | status = nfs4_reclaim_lease(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2104 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2105 | goto out_error; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2106 | continue; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 2107 | } |
| 2108 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2109 | /* Initialize or reset the session */ |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2110 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2111 | section = "reset session"; |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 2112 | status = nfs4_reset_session(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2113 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 2114 | continue; |
| 2115 | if (status < 0) |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2116 | goto out_error; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2117 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2118 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2119 | /* Send BIND_CONN_TO_SESSION */ |
| 2120 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2121 | &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2122 | section = "bind conn to session"; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2123 | status = nfs4_bind_conn_to_session(clp); |
| 2124 | if (status < 0) |
| 2125 | goto out_error; |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2126 | continue; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2127 | } |
| 2128 | |
Trond Myklebust | 5df904a | 2012-11-21 09:22:14 -0500 | [diff] [blame] | 2129 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
| 2130 | section = "check lease"; |
| 2131 | status = nfs4_check_lease(clp); |
| 2132 | if (status < 0) |
| 2133 | goto out_error; |
| 2134 | continue; |
| 2135 | } |
| 2136 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2137 | /* First recover reboot state... */ |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 2138 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2139 | section = "reclaim reboot"; |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 2140 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 2141 | clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2142 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 2143 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2144 | continue; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2145 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2146 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 2147 | continue; |
| 2148 | if (status < 0) |
| 2149 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2150 | } |
| 2151 | |
| 2152 | /* Now recover expired state... */ |
| 2153 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2154 | section = "reclaim nograce"; |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 2155 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 2156 | clp->cl_mvops->nograce_recovery_ops); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2157 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 2158 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2159 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 2160 | continue; |
| 2161 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2162 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2163 | } |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 2164 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 2165 | nfs4_end_drain_session(clp); |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 2166 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
| 2167 | nfs_client_return_marked_delegations(clp); |
| 2168 | continue; |
| 2169 | } |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2170 | |
| 2171 | nfs4_clear_state_manager_bit(clp); |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2172 | /* Did we race with an attempt to give us more work? */ |
| 2173 | if (clp->cl_state == 0) |
| 2174 | break; |
| 2175 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 2176 | break; |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 2177 | } while (atomic_read(&clp->cl_count) > 1); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2178 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | out_error: |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2180 | if (strlen(section)) |
| 2181 | section_sep = ": "; |
| 2182 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" |
| 2183 | " with error %d\n", section_sep, section, |
| 2184 | clp->cl_hostname, -status); |
Chuck Lever | ffe5a83 | 2012-09-14 17:23:23 -0400 | [diff] [blame] | 2185 | ssleep(1); |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 2186 | nfs4_end_drain_session(clp); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2187 | nfs4_clear_state_manager_bit(clp); |
| 2188 | } |
| 2189 | |
| 2190 | static int nfs4_run_state_manager(void *ptr) |
| 2191 | { |
| 2192 | struct nfs_client *clp = ptr; |
| 2193 | |
| 2194 | allow_signal(SIGKILL); |
| 2195 | nfs4_state_manager(clp); |
| 2196 | nfs_put_client(clp); |
| 2197 | module_put_and_exit(0); |
| 2198 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | } |
| 2200 | |
| 2201 | /* |
| 2202 | * Local variables: |
| 2203 | * c-basic-offset: 8 |
| 2204 | * End: |
| 2205 | */ |