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); |
Trond Myklebust | 202c312 | 2013-01-18 22:56:23 -0500 | [diff] [blame] | 139 | if (status == 0) { |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 140 | /* Sustain the lease, even if it's empty. If the clientid4 |
| 141 | * goes stale it's of no use for trunking discovery. */ |
| 142 | nfs4_schedule_state_renewal(*result); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 143 | } |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 144 | out: |
| 145 | return status; |
| 146 | } |
| 147 | |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 148 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 149 | { |
| 150 | struct rpc_cred *cred = NULL; |
| 151 | |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 152 | if (clp->cl_machine_cred != NULL) |
| 153 | cred = get_rpccred(clp->cl_machine_cred); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 154 | return cred; |
| 155 | } |
| 156 | |
Chuck Lever | d688f7b | 2013-07-24 12:28:28 -0400 | [diff] [blame] | 157 | static void nfs4_root_machine_cred(struct nfs_client *clp) |
| 158 | { |
| 159 | struct rpc_cred *cred, *new; |
| 160 | |
| 161 | new = rpc_lookup_machine_cred(NULL); |
| 162 | spin_lock(&clp->cl_lock); |
| 163 | cred = clp->cl_machine_cred; |
| 164 | clp->cl_machine_cred = new; |
| 165 | spin_unlock(&clp->cl_lock); |
| 166 | if (cred != NULL) |
| 167 | put_rpccred(cred); |
| 168 | } |
| 169 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 170 | static struct rpc_cred * |
| 171 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 172 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 173 | struct rpc_cred *cred = NULL; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 174 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 175 | struct rb_node *pos; |
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 | for (pos = rb_first(&server->state_owners); |
| 178 | pos != NULL; |
| 179 | pos = rb_next(pos)) { |
| 180 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 181 | if (list_empty(&sp->so_states)) |
| 182 | continue; |
| 183 | cred = get_rpccred(sp->so_cred); |
| 184 | break; |
| 185 | } |
| 186 | return cred; |
| 187 | } |
| 188 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 189 | /** |
| 190 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation |
| 191 | * @clp: client state handle |
| 192 | * |
| 193 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 194 | * Caller must hold clp->cl_lock. |
| 195 | */ |
| 196 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) |
| 197 | { |
| 198 | struct rpc_cred *cred = NULL; |
| 199 | struct nfs_server *server; |
| 200 | |
Sachin Prabhu | e49a29b | 2012-03-16 19:25:52 +0000 | [diff] [blame] | 201 | /* Use machine credentials if available */ |
| 202 | cred = nfs4_get_machine_cred_locked(clp); |
| 203 | if (cred != NULL) |
| 204 | goto out; |
| 205 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 206 | rcu_read_lock(); |
| 207 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 208 | cred = nfs4_get_renew_cred_server_locked(server); |
| 209 | if (cred != NULL) |
| 210 | break; |
| 211 | } |
| 212 | rcu_read_unlock(); |
Sachin Prabhu | e49a29b | 2012-03-16 19:25:52 +0000 | [diff] [blame] | 213 | |
| 214 | out: |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 215 | return cred; |
| 216 | } |
| 217 | |
Andy Adamson | 62f288a | 2013-06-19 16:39:44 -0400 | [diff] [blame] | 218 | static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 219 | { |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 220 | if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 221 | spin_lock(&tbl->slot_tbl_lock); |
Trond Myklebust | b75ad4c | 2012-11-29 17:27:47 -0500 | [diff] [blame] | 222 | nfs41_wake_slot_table(tbl); |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 223 | spin_unlock(&tbl->slot_tbl_lock); |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 224 | } |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 225 | } |
| 226 | |
Andy Adamson | 62f288a | 2013-06-19 16:39:44 -0400 | [diff] [blame] | 227 | static void nfs4_end_drain_session(struct nfs_client *clp) |
| 228 | { |
| 229 | struct nfs4_session *ses = clp->cl_session; |
| 230 | |
Chuck Lever | 2cf8bca | 2013-08-09 12:49:56 -0400 | [diff] [blame] | 231 | if (clp->cl_slot_tbl) { |
| 232 | nfs4_end_drain_slot_table(clp->cl_slot_tbl); |
| 233 | return; |
| 234 | } |
| 235 | |
Andy Adamson | 62f288a | 2013-06-19 16:39:44 -0400 | [diff] [blame] | 236 | if (ses != NULL) { |
| 237 | nfs4_end_drain_slot_table(&ses->bc_slot_table); |
| 238 | nfs4_end_drain_slot_table(&ses->fc_slot_table); |
| 239 | } |
| 240 | } |
| 241 | |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 242 | static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 243 | { |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 244 | set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 245 | spin_lock(&tbl->slot_tbl_lock); |
Andy Adamson | b6bf6e7 | 2012-02-17 13:05:23 -0500 | [diff] [blame] | 246 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
Wolfram Sang | 16735d0 | 2013-11-14 14:32:02 -0800 | [diff] [blame] | 247 | reinit_completion(&tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 248 | spin_unlock(&tbl->slot_tbl_lock); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 249 | return wait_for_completion_interruptible(&tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 250 | } |
| 251 | spin_unlock(&tbl->slot_tbl_lock); |
| 252 | return 0; |
| 253 | } |
| 254 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 255 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
| 256 | { |
| 257 | struct nfs4_session *ses = clp->cl_session; |
| 258 | int ret = 0; |
| 259 | |
Chuck Lever | 2cf8bca | 2013-08-09 12:49:56 -0400 | [diff] [blame] | 260 | if (clp->cl_slot_tbl) |
| 261 | return nfs4_drain_slot_tbl(clp->cl_slot_tbl); |
| 262 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 263 | /* back channel */ |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 264 | ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 265 | if (ret) |
| 266 | return ret; |
| 267 | /* fore channel */ |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 268 | return nfs4_drain_slot_tbl(&ses->fc_slot_table); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 269 | } |
| 270 | |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 271 | #if defined(CONFIG_NFS_V4_1) |
| 272 | |
Chuck Lever | 2cf8bca | 2013-08-09 12:49:56 -0400 | [diff] [blame] | 273 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
| 274 | { |
| 275 | int status; |
| 276 | struct nfs_fsinfo fsinfo; |
| 277 | |
| 278 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { |
| 279 | nfs4_schedule_state_renewal(clp); |
| 280 | return 0; |
| 281 | } |
| 282 | |
| 283 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
| 284 | if (status == 0) { |
| 285 | /* Update lease time and schedule renewal */ |
| 286 | spin_lock(&clp->cl_lock); |
| 287 | clp->cl_lease_time = fsinfo.lease_time * HZ; |
| 288 | clp->cl_last_renewal = jiffies; |
| 289 | spin_unlock(&clp->cl_lock); |
| 290 | |
| 291 | nfs4_schedule_state_renewal(clp); |
| 292 | } |
| 293 | |
| 294 | return status; |
| 295 | } |
| 296 | |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 297 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
| 298 | { |
| 299 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 300 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 301 | /* create_session negotiated new slot table */ |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 302 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 303 | nfs41_setup_state_renewal(clp); |
| 304 | } |
| 305 | |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 306 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
| 307 | { |
| 308 | int status; |
| 309 | |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 310 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
| 311 | goto do_confirm; |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 312 | nfs4_begin_drain_session(clp); |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 313 | status = nfs4_proc_exchange_id(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 314 | if (status != 0) |
| 315 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 316 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 317 | do_confirm: |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 318 | status = nfs4_proc_create_session(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 319 | if (status != 0) |
| 320 | goto out; |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 321 | nfs41_finish_session_reset(clp); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 322 | nfs_mark_client_ready(clp, NFS_CS_READY); |
| 323 | out: |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 324 | return status; |
| 325 | } |
| 326 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 327 | /** |
| 328 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) |
| 329 | * |
| 330 | * @clp: nfs_client under test |
| 331 | * @result: OUT: found nfs_client, or clp |
| 332 | * @cred: credential to use for trunking test |
| 333 | * |
| 334 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. |
| 335 | * If NFS4_OK is returned, an nfs_client pointer is planted in |
| 336 | * "result". |
| 337 | * |
| 338 | * Note: The returned client may not yet be marked ready. |
| 339 | */ |
| 340 | int nfs41_discover_server_trunking(struct nfs_client *clp, |
| 341 | struct nfs_client **result, |
| 342 | struct rpc_cred *cred) |
| 343 | { |
| 344 | int status; |
| 345 | |
| 346 | status = nfs4_proc_exchange_id(clp, cred); |
| 347 | if (status != NFS4_OK) |
| 348 | return status; |
Weston Andros Adamson | fd48357 | 2012-10-02 11:33:22 -0700 | [diff] [blame] | 349 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 350 | |
| 351 | return nfs41_walk_client_list(clp, result, cred); |
| 352 | } |
| 353 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 354 | #endif /* CONFIG_NFS_V4_1 */ |
| 355 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 356 | /** |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 357 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 358 | * @clp: client state handle |
| 359 | * |
| 360 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 361 | */ |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 362 | struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp) |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 363 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 364 | struct rpc_cred *cred; |
| 365 | |
| 366 | spin_lock(&clp->cl_lock); |
| 367 | cred = nfs4_get_machine_cred_locked(clp); |
| 368 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 369 | return cred; |
| 370 | } |
| 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 373 | 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] | 374 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 375 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 376 | *parent = NULL; |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 377 | struct nfs4_state_owner *sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 379 | while (*p != NULL) { |
| 380 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 381 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 382 | |
| 383 | if (cred < sp->so_cred) |
| 384 | p = &parent->rb_left; |
| 385 | else if (cred > sp->so_cred) |
| 386 | p = &parent->rb_right; |
| 387 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 388 | if (!list_empty(&sp->so_lru)) |
| 389 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 390 | atomic_inc(&sp->so_count); |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 391 | return sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 392 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | } |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 394 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | } |
| 396 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 397 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 398 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 399 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 400 | struct nfs_server *server = new->so_server; |
| 401 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 402 | *parent = NULL; |
| 403 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 404 | int err; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 405 | |
| 406 | while (*p != NULL) { |
| 407 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 408 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 409 | |
| 410 | if (new->so_cred < sp->so_cred) |
| 411 | p = &parent->rb_left; |
| 412 | else if (new->so_cred > sp->so_cred) |
| 413 | p = &parent->rb_right; |
| 414 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 415 | if (!list_empty(&sp->so_lru)) |
| 416 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 417 | atomic_inc(&sp->so_count); |
| 418 | return sp; |
| 419 | } |
| 420 | } |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 421 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 422 | if (err) |
| 423 | return ERR_PTR(err); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 424 | rb_link_node(&new->so_server_node, parent, p); |
| 425 | rb_insert_color(&new->so_server_node, &server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 426 | return new; |
| 427 | } |
| 428 | |
| 429 | static void |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 430 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 431 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 432 | struct nfs_server *server = sp->so_server; |
| 433 | |
| 434 | if (!RB_EMPTY_NODE(&sp->so_server_node)) |
| 435 | rb_erase(&sp->so_server_node, &server->state_owners); |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 436 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 437 | } |
| 438 | |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 439 | static void |
| 440 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) |
| 441 | { |
Trond Myklebust | 95b72eb | 2012-04-20 19:24:51 -0400 | [diff] [blame] | 442 | sc->create_time = ktime_get(); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 443 | sc->flags = 0; |
| 444 | sc->counter = 0; |
| 445 | spin_lock_init(&sc->lock); |
| 446 | INIT_LIST_HEAD(&sc->list); |
| 447 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); |
| 448 | } |
| 449 | |
| 450 | static void |
| 451 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) |
| 452 | { |
| 453 | rpc_destroy_wait_queue(&sc->wait); |
| 454 | } |
| 455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | /* |
| 457 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to |
| 458 | * create a new state_owner. |
| 459 | * |
| 460 | */ |
| 461 | static struct nfs4_state_owner * |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 462 | nfs4_alloc_state_owner(struct nfs_server *server, |
| 463 | struct rpc_cred *cred, |
| 464 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | { |
| 466 | struct nfs4_state_owner *sp; |
| 467 | |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 468 | sp = kzalloc(sizeof(*sp), gfp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | if (!sp) |
| 470 | return NULL; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 471 | sp->so_server = server; |
| 472 | sp->so_cred = get_rpccred(cred); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 473 | spin_lock_init(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | INIT_LIST_HEAD(&sp->so_states); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 475 | nfs4_init_seqid_counter(&sp->so_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | atomic_set(&sp->so_count, 1); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 477 | INIT_LIST_HEAD(&sp->so_lru); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 478 | seqcount_init(&sp->so_reclaim_seqcount); |
Trond Myklebust | 65b62a2 | 2013-02-07 10:54:07 -0500 | [diff] [blame] | 479 | mutex_init(&sp->so_delegreturn_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | return sp; |
| 481 | } |
| 482 | |
Adrian Bunk | 1d2e88e | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 483 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
| 485 | { |
Trond Myklebust | c77365c | 2012-04-21 12:31:05 -0400 | [diff] [blame] | 486 | struct rb_node *rb_node = &sp->so_server_node; |
| 487 | |
| 488 | if (!RB_EMPTY_NODE(rb_node)) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 489 | struct nfs_server *server = sp->so_server; |
| 490 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 491 | |
| 492 | spin_lock(&clp->cl_lock); |
Trond Myklebust | c77365c | 2012-04-21 12:31:05 -0400 | [diff] [blame] | 493 | if (!RB_EMPTY_NODE(rb_node)) { |
| 494 | rb_erase(rb_node, &server->state_owners); |
| 495 | RB_CLEAR_NODE(rb_node); |
| 496 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 497 | spin_unlock(&clp->cl_lock); |
| 498 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 501 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
| 502 | { |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 503 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 504 | put_rpccred(sp->so_cred); |
| 505 | kfree(sp); |
| 506 | } |
| 507 | |
| 508 | static void nfs4_gc_state_owners(struct nfs_server *server) |
| 509 | { |
| 510 | struct nfs_client *clp = server->nfs_client; |
| 511 | struct nfs4_state_owner *sp, *tmp; |
| 512 | unsigned long time_min, time_max; |
| 513 | LIST_HEAD(doomed); |
| 514 | |
| 515 | spin_lock(&clp->cl_lock); |
| 516 | time_max = jiffies; |
| 517 | time_min = (long)time_max - (long)clp->cl_lease_time; |
| 518 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 519 | /* NB: LRU is sorted so that oldest is at the head */ |
| 520 | if (time_in_range(sp->so_expires, time_min, time_max)) |
| 521 | break; |
| 522 | list_move(&sp->so_lru, &doomed); |
| 523 | nfs4_remove_state_owner_locked(sp); |
| 524 | } |
| 525 | spin_unlock(&clp->cl_lock); |
| 526 | |
| 527 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 528 | list_del(&sp->so_lru); |
| 529 | nfs4_free_state_owner(sp); |
| 530 | } |
| 531 | } |
| 532 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 533 | /** |
| 534 | * nfs4_get_state_owner - Look up a state owner given a credential |
| 535 | * @server: nfs_server to search |
| 536 | * @cred: RPC credential to match |
| 537 | * |
| 538 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. |
| 539 | */ |
| 540 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 541 | struct rpc_cred *cred, |
| 542 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 544 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | struct nfs4_state_owner *sp, *new; |
| 546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 548 | sp = nfs4_find_state_owner_locked(server, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | if (sp != NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 551 | goto out; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 552 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 553 | if (new == NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 554 | goto out; |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 555 | do { |
| 556 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) |
| 557 | break; |
| 558 | spin_lock(&clp->cl_lock); |
| 559 | sp = nfs4_insert_state_owner_locked(new); |
| 560 | spin_unlock(&clp->cl_lock); |
| 561 | } while (sp == ERR_PTR(-EAGAIN)); |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 562 | if (sp != new) |
| 563 | nfs4_free_state_owner(new); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 564 | out: |
| 565 | nfs4_gc_state_owners(server); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 566 | return sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | } |
| 568 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 569 | /** |
| 570 | * nfs4_put_state_owner - Release a nfs4_state_owner |
| 571 | * @sp: state owner data to release |
Trond Myklebust | 7bf97bc | 2012-04-21 12:36:19 -0400 | [diff] [blame] | 572 | * |
| 573 | * Note that we keep released state owners on an LRU |
| 574 | * list. |
| 575 | * This caches valid state owners so that they can be |
| 576 | * reused, to avoid the OPEN_CONFIRM on minor version 0. |
| 577 | * It also pins the uniquifier of dropped state owners for |
| 578 | * a while, to ensure that those state owner names are |
| 579 | * never reused. |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 580 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
| 582 | { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 583 | struct nfs_server *server = sp->so_server; |
| 584 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | |
| 586 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) |
| 587 | return; |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 588 | |
Trond Myklebust | 7bf97bc | 2012-04-21 12:36:19 -0400 | [diff] [blame] | 589 | sp->so_expires = jiffies; |
| 590 | list_add_tail(&sp->so_lru, &server->state_owners_lru); |
| 591 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | /** |
| 595 | * nfs4_purge_state_owners - Release all cached state owners |
| 596 | * @server: nfs_server with cached state owners to release |
| 597 | * |
| 598 | * Called at umount time. Remaining state owners will be on |
| 599 | * the LRU with ref count of zero. |
| 600 | */ |
| 601 | void nfs4_purge_state_owners(struct nfs_server *server) |
| 602 | { |
| 603 | struct nfs_client *clp = server->nfs_client; |
| 604 | struct nfs4_state_owner *sp, *tmp; |
| 605 | LIST_HEAD(doomed); |
| 606 | |
| 607 | spin_lock(&clp->cl_lock); |
| 608 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 609 | list_move(&sp->so_lru, &doomed); |
| 610 | nfs4_remove_state_owner_locked(sp); |
| 611 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 613 | |
| 614 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 615 | list_del(&sp->so_lru); |
| 616 | nfs4_free_state_owner(sp); |
| 617 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | } |
| 619 | |
| 620 | static struct nfs4_state * |
| 621 | nfs4_alloc_open_state(void) |
| 622 | { |
| 623 | struct nfs4_state *state; |
| 624 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 625 | state = kzalloc(sizeof(*state), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | if (!state) |
| 627 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | atomic_set(&state->count, 1); |
| 629 | INIT_LIST_HEAD(&state->lock_states); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 630 | spin_lock_init(&state->state_lock); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 631 | seqlock_init(&state->seqlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | return state; |
| 633 | } |
| 634 | |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 635 | void |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 636 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 637 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 638 | if (state->state == fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 639 | return; |
| 640 | /* NB! List reordering - see the reclaim code for why. */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 641 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
| 642 | if (fmode & FMODE_WRITE) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 643 | list_move(&state->open_states, &state->owner->so_states); |
| 644 | else |
| 645 | list_move_tail(&state->open_states, &state->owner->so_states); |
| 646 | } |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 647 | state->state = fmode; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 648 | } |
| 649 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | static struct nfs4_state * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) |
| 652 | { |
| 653 | struct nfs_inode *nfsi = NFS_I(inode); |
| 654 | struct nfs4_state *state; |
| 655 | |
| 656 | list_for_each_entry(state, &nfsi->open_states, inode_states) { |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 657 | if (state->owner != owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | continue; |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 659 | if (!nfs4_valid_open_stateid(state)) |
| 660 | continue; |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 661 | if (atomic_inc_not_zero(&state->count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | return state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | } |
| 664 | return NULL; |
| 665 | } |
| 666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | static void |
| 668 | nfs4_free_open_state(struct nfs4_state *state) |
| 669 | { |
| 670 | kfree(state); |
| 671 | } |
| 672 | |
| 673 | struct nfs4_state * |
| 674 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) |
| 675 | { |
| 676 | struct nfs4_state *state, *new; |
| 677 | struct nfs_inode *nfsi = NFS_I(inode); |
| 678 | |
| 679 | spin_lock(&inode->i_lock); |
| 680 | state = __nfs4_find_state_byowner(inode, owner); |
| 681 | spin_unlock(&inode->i_lock); |
| 682 | if (state) |
| 683 | goto out; |
| 684 | new = nfs4_alloc_open_state(); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 685 | spin_lock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | spin_lock(&inode->i_lock); |
| 687 | state = __nfs4_find_state_byowner(inode, owner); |
| 688 | if (state == NULL && new != NULL) { |
| 689 | state = new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | state->owner = owner; |
| 691 | atomic_inc(&owner->so_count); |
| 692 | list_add(&state->inode_states, &nfsi->open_states); |
Dave Chinner | 0444d76 | 2011-03-29 18:08:50 +1100 | [diff] [blame] | 693 | ihold(inode); |
| 694 | state->inode = inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 696 | /* Note: The reclaim code dictates that we add stateless |
| 697 | * and read-only stateids to the end of the list */ |
| 698 | list_add_tail(&state->open_states, &owner->so_states); |
| 699 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | } else { |
| 701 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 702 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | if (new) |
| 704 | nfs4_free_open_state(new); |
| 705 | } |
| 706 | out: |
| 707 | return state; |
| 708 | } |
| 709 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | void nfs4_put_open_state(struct nfs4_state *state) |
| 711 | { |
| 712 | struct inode *inode = state->inode; |
| 713 | struct nfs4_state_owner *owner = state->owner; |
| 714 | |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 715 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | return; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 717 | spin_lock(&inode->i_lock); |
Trond Myklebust | ba683031 | 2007-07-27 10:23:05 -0400 | [diff] [blame] | 718 | list_del(&state->inode_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | list_del(&state->open_states); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 720 | spin_unlock(&inode->i_lock); |
| 721 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | nfs4_free_open_state(state); |
| 724 | nfs4_put_state_owner(owner); |
| 725 | } |
| 726 | |
| 727 | /* |
Trond Myklebust | 83c9d41 | 2005-10-18 14:20:13 -0700 | [diff] [blame] | 728 | * Close the current file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | */ |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 730 | static void __nfs4_close(struct nfs4_state *state, |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 731 | fmode_t fmode, gfp_t gfp_mask, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | struct nfs4_state_owner *owner = state->owner; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 734 | int call_close = 0; |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 735 | fmode_t newstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
| 737 | atomic_inc(&owner->so_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | /* Protect against nfs4_find_state() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 739 | spin_lock(&owner->so_lock); |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 740 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 741 | case FMODE_READ: |
| 742 | state->n_rdonly--; |
| 743 | break; |
| 744 | case FMODE_WRITE: |
| 745 | state->n_wronly--; |
| 746 | break; |
| 747 | case FMODE_READ|FMODE_WRITE: |
| 748 | state->n_rdwr--; |
| 749 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 750 | newstate = FMODE_READ|FMODE_WRITE; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 751 | if (state->n_rdwr == 0) { |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 752 | if (state->n_rdonly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 753 | newstate &= ~FMODE_READ; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 754 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 755 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 756 | } |
| 757 | if (state->n_wronly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 758 | newstate &= ~FMODE_WRITE; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 759 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 760 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 761 | } |
| 762 | if (newstate == 0) |
| 763 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 764 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 765 | nfs4_state_set_mode_locked(state, newstate); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 766 | spin_unlock(&owner->so_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 767 | |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 768 | if (!call_close) { |
Trond Myklebust | b39e625 | 2007-06-11 23:05:07 -0400 | [diff] [blame] | 769 | nfs4_put_open_state(state); |
| 770 | nfs4_put_state_owner(owner); |
Trond Myklebust | 1f7977c | 2012-09-20 20:31:51 -0400 | [diff] [blame] | 771 | } else |
| 772 | nfs4_do_close(state, gfp_mask, wait); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 773 | } |
| 774 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 775 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 776 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 777 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 778 | } |
| 779 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 780 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 781 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 782 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | /* |
| 786 | * Search the state->lock_states for an existing lock_owner |
| 787 | * that is compatible with current->files |
| 788 | */ |
| 789 | static struct nfs4_lock_state * |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 790 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | { |
| 792 | struct nfs4_lock_state *pos; |
| 793 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 794 | if (pos->ls_owner != fl_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | continue; |
| 796 | atomic_inc(&pos->ls_count); |
| 797 | return pos; |
| 798 | } |
| 799 | return NULL; |
| 800 | } |
| 801 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | /* |
| 803 | * Return a compatible lock_state. If no initialized lock_state structure |
| 804 | * exists, return an uninitialized one. |
| 805 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | */ |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 807 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | { |
| 809 | struct nfs4_lock_state *lsp; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 810 | struct nfs_server *server = state->owner->so_server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 812 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | if (lsp == NULL) |
| 814 | return NULL; |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 815 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | atomic_set(&lsp->ls_count, 1); |
Trond Myklebust | b64aec8 | 2009-07-21 16:47:46 -0400 | [diff] [blame] | 817 | lsp->ls_state = state; |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 818 | lsp->ls_owner = fl_owner; |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 819 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
| 820 | if (lsp->ls_seqid.owner_id < 0) |
Trond Myklebust | d2d7ce2 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 821 | goto out_free; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 822 | INIT_LIST_HEAD(&lsp->ls_locks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | return lsp; |
Trond Myklebust | d2d7ce2 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 824 | out_free: |
| 825 | kfree(lsp); |
| 826 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } |
| 828 | |
Trond Myklebust | 5ae67c4 | 2012-03-19 16:17:18 -0400 | [diff] [blame] | 829 | 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] | 830 | { |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 831 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 832 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 833 | kfree(lsp); |
| 834 | } |
| 835 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | /* |
| 837 | * Return a compatible lock_state. If no initialized lock_state structure |
| 838 | * exists, return an uninitialized one. |
| 839 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | */ |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 841 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 843 | struct nfs4_lock_state *lsp, *new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 845 | for(;;) { |
| 846 | spin_lock(&state->state_lock); |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 847 | lsp = __nfs4_find_lock_state(state, owner); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 848 | if (lsp != NULL) |
| 849 | break; |
| 850 | if (new != NULL) { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 851 | list_add(&new->ls_locks, &state->lock_states); |
| 852 | set_bit(LK_STATE_IN_USE, &state->flags); |
| 853 | lsp = new; |
| 854 | new = NULL; |
| 855 | break; |
| 856 | } |
| 857 | spin_unlock(&state->state_lock); |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 858 | new = nfs4_alloc_lock_state(state, owner); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 859 | if (new == NULL) |
| 860 | return NULL; |
| 861 | } |
| 862 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 863 | if (new != NULL) |
Trond Myklebust | 5ae67c4 | 2012-03-19 16:17:18 -0400 | [diff] [blame] | 864 | nfs4_free_lock_state(state->owner->so_server, new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | return lsp; |
| 866 | } |
| 867 | |
| 868 | /* |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 869 | * Release reference to lock_state, and free it if we see that |
| 870 | * it is no longer in use |
| 871 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 872 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 873 | { |
Trond Myklebust | c8b2d0b | 2013-05-03 16:22:55 -0400 | [diff] [blame] | 874 | struct nfs_server *server; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 875 | struct nfs4_state *state; |
| 876 | |
| 877 | if (lsp == NULL) |
| 878 | return; |
| 879 | state = lsp->ls_state; |
| 880 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
| 881 | return; |
| 882 | list_del(&lsp->ls_locks); |
| 883 | if (list_empty(&state->lock_states)) |
| 884 | clear_bit(LK_STATE_IN_USE, &state->flags); |
| 885 | spin_unlock(&state->state_lock); |
Jeff Layton | 0c0e0d3 | 2014-09-08 08:26:01 -0400 | [diff] [blame] | 886 | server = state->owner->so_server; |
| 887 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
| 888 | struct nfs_client *clp = server->nfs_client; |
| 889 | |
| 890 | clp->cl_mvops->free_lock_state(server, lsp); |
| 891 | } else |
Trond Myklebust | c8b2d0b | 2013-05-03 16:22:55 -0400 | [diff] [blame] | 892 | nfs4_free_lock_state(server, lsp); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 893 | } |
| 894 | |
| 895 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
| 896 | { |
| 897 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
| 898 | |
| 899 | dst->fl_u.nfs4_fl.owner = lsp; |
| 900 | atomic_inc(&lsp->ls_count); |
| 901 | } |
| 902 | |
| 903 | static void nfs4_fl_release_lock(struct file_lock *fl) |
| 904 | { |
| 905 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
| 906 | } |
| 907 | |
Alexey Dobriyan | 6aed628 | 2009-09-21 17:01:11 -0700 | [diff] [blame] | 908 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 909 | .fl_copy_lock = nfs4_fl_copy_lock, |
| 910 | .fl_release_private = nfs4_fl_release_lock, |
| 911 | }; |
| 912 | |
| 913 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
| 914 | { |
| 915 | struct nfs4_lock_state *lsp; |
| 916 | |
| 917 | if (fl->fl_ops != NULL) |
| 918 | return 0; |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 919 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 920 | if (lsp == NULL) |
| 921 | return -ENOMEM; |
| 922 | fl->fl_u.nfs4_fl.owner = lsp; |
| 923 | fl->fl_ops = &nfs4_fl_lock_ops; |
| 924 | return 0; |
| 925 | } |
| 926 | |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 927 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
| 928 | struct nfs4_state *state, |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 929 | const struct nfs_lockowner *lockowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 931 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 932 | fl_owner_t fl_owner; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 933 | int ret = -ENOENT; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 934 | |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 935 | |
| 936 | if (lockowner == NULL) |
| 937 | goto out; |
| 938 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 939 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
| 940 | goto out; |
| 941 | |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 942 | fl_owner = lockowner->l_owner; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 943 | spin_lock(&state->state_lock); |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 944 | lsp = __nfs4_find_lock_state(state, fl_owner); |
NeilBrown | ef1820f | 2013-09-04 17:04:49 +1000 | [diff] [blame] | 945 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
| 946 | ret = -EIO; |
| 947 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 948 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 949 | ret = 0; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 950 | } |
| 951 | spin_unlock(&state->state_lock); |
| 952 | nfs4_put_lock_state(lsp); |
| 953 | out: |
| 954 | return ret; |
| 955 | } |
| 956 | |
Trond Myklebust | 927864c | 2014-03-04 13:12:03 -0500 | [diff] [blame] | 957 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 958 | { |
Trond Myklebust | 92b40e9 | 2013-04-20 01:25:45 -0400 | [diff] [blame] | 959 | const nfs4_stateid *src; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 960 | int seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 962 | do { |
Trond Myklebust | 92b40e9 | 2013-04-20 01:25:45 -0400 | [diff] [blame] | 963 | src = &zero_stateid; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 964 | seq = read_seqbegin(&state->seqlock); |
Trond Myklebust | 92b40e9 | 2013-04-20 01:25:45 -0400 | [diff] [blame] | 965 | if (test_bit(NFS_OPEN_STATE, &state->flags)) |
| 966 | src = &state->open_stateid; |
| 967 | nfs4_stateid_copy(dst, src); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 968 | } while (read_seqretry(&state->seqlock, seq)); |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 969 | } |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 970 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 971 | /* |
| 972 | * Byte-range lock aware utility to initialize the stateid of read/write |
| 973 | * requests. |
| 974 | */ |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 975 | int nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 976 | fmode_t fmode, const struct nfs_lockowner *lockowner) |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 977 | { |
NeilBrown | ef1820f | 2013-09-04 17:04:49 +1000 | [diff] [blame] | 978 | int ret = nfs4_copy_lock_stateid(dst, state, lockowner); |
| 979 | if (ret == -EIO) |
| 980 | /* A lost lock - don't even consider delegations */ |
| 981 | goto out; |
Andy Adamson | 146d70c | 2014-02-18 10:36:05 -0500 | [diff] [blame] | 982 | /* returns true if delegation stateid found and copied */ |
| 983 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) { |
| 984 | ret = 0; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 985 | goto out; |
Andy Adamson | 146d70c | 2014-02-18 10:36:05 -0500 | [diff] [blame] | 986 | } |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 987 | if (ret != -ENOENT) |
NeilBrown | ef1820f | 2013-09-04 17:04:49 +1000 | [diff] [blame] | 988 | /* nfs4_copy_delegation_stateid() didn't over-write |
| 989 | * dst, so it still has the lock stateid which we now |
| 990 | * choose to use. |
| 991 | */ |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 992 | goto out; |
Trond Myklebust | 927864c | 2014-03-04 13:12:03 -0500 | [diff] [blame] | 993 | nfs4_copy_open_stateid(dst, state); |
| 994 | ret = 0; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 995 | out: |
Trond Myklebust | 3b66486 | 2013-03-17 15:31:15 -0400 | [diff] [blame] | 996 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
| 997 | dst->seqid = 0; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 998 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | } |
| 1000 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1001 | 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] | 1002 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1003 | struct nfs_seqid *new; |
| 1004 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1005 | new = kmalloc(sizeof(*new), gfp_mask); |
Trond Myklebust | badc76d | 2015-01-23 18:48:00 -0500 | [diff] [blame] | 1006 | if (new == NULL) |
| 1007 | return ERR_PTR(-ENOMEM); |
| 1008 | new->sequence = counter; |
| 1009 | INIT_LIST_HEAD(&new->list); |
| 1010 | new->task = NULL; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1011 | return new; |
| 1012 | } |
| 1013 | |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 1014 | void nfs_release_seqid(struct nfs_seqid *seqid) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1015 | { |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1016 | struct nfs_seqid_counter *sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1017 | |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1018 | if (seqid == NULL || list_empty(&seqid->list)) |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1019 | return; |
| 1020 | sequence = seqid->sequence; |
| 1021 | spin_lock(&sequence->lock); |
| 1022 | list_del_init(&seqid->list); |
| 1023 | if (!list_empty(&sequence->list)) { |
| 1024 | struct nfs_seqid *next; |
| 1025 | |
| 1026 | next = list_first_entry(&sequence->list, |
| 1027 | struct nfs_seqid, list); |
| 1028 | rpc_wake_up_queued_task(&sequence->wait, next->task); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1029 | } |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1030 | spin_unlock(&sequence->lock); |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | void nfs_free_seqid(struct nfs_seqid *seqid) |
| 1034 | { |
| 1035 | nfs_release_seqid(seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1036 | kfree(seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | } |
| 1038 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1040 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
| 1041 | * failed with a seqid incrementing error - |
Toralf Förster | 16a6ddc | 2013-12-12 19:09:00 +0100 | [diff] [blame] | 1042 | * see comments nfs4.h:seqid_mutating_error() |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1043 | */ |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 1044 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1046 | switch (status) { |
| 1047 | case 0: |
| 1048 | break; |
| 1049 | case -NFS4ERR_BAD_SEQID: |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 1050 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
| 1051 | return; |
Trond Myklebust | 9a3ba43 | 2012-03-12 18:01:48 -0400 | [diff] [blame] | 1052 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
Dan Muntz | 497799e | 2008-02-13 13:09:35 -0800 | [diff] [blame] | 1053 | " sequence-id error on an" |
| 1054 | " unconfirmed sequence %p!\n", |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 1055 | seqid->sequence); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1056 | case -NFS4ERR_STALE_CLIENTID: |
| 1057 | case -NFS4ERR_STALE_STATEID: |
| 1058 | case -NFS4ERR_BAD_STATEID: |
| 1059 | case -NFS4ERR_BADXDR: |
| 1060 | case -NFS4ERR_RESOURCE: |
| 1061 | case -NFS4ERR_NOFILEHANDLE: |
| 1062 | /* Non-seqid mutating errors */ |
| 1063 | return; |
| 1064 | }; |
| 1065 | /* |
| 1066 | * Note: no locking needed as we are guaranteed to be first |
| 1067 | * on the sequence list |
| 1068 | */ |
| 1069 | seqid->sequence->counter++; |
| 1070 | } |
| 1071 | |
| 1072 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) |
| 1073 | { |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1074 | struct nfs4_state_owner *sp; |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1075 | |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1076 | if (seqid == NULL) |
| 1077 | return; |
| 1078 | |
| 1079 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1080 | if (status == -NFS4ERR_BAD_SEQID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | nfs4_drop_state_owner(sp); |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1082 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1083 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1084 | } |
| 1085 | |
| 1086 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1087 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
| 1088 | * failed with a seqid incrementing error - |
Toralf Förster | 16a6ddc | 2013-12-12 19:09:00 +0100 | [diff] [blame] | 1089 | * see comments nfs4.h:seqid_mutating_error() |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1090 | */ |
| 1091 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) |
| 1092 | { |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1093 | if (seqid != NULL) |
| 1094 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1095 | } |
| 1096 | |
| 1097 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) |
| 1098 | { |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1099 | struct nfs_seqid_counter *sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1100 | int status = 0; |
| 1101 | |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1102 | if (seqid == NULL) |
| 1103 | goto out; |
| 1104 | sequence = seqid->sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1105 | spin_lock(&sequence->lock); |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1106 | seqid->task = task; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1107 | if (list_empty(&seqid->list)) |
| 1108 | list_add_tail(&seqid->list, &sequence->list); |
| 1109 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) |
| 1110 | goto unlock; |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 1111 | rpc_sleep_on(&sequence->wait, task, NULL); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1112 | status = -EAGAIN; |
| 1113 | unlock: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1114 | spin_unlock(&sequence->lock); |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1115 | out: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1116 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | } |
| 1118 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1119 | static int nfs4_run_state_manager(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1121 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1122 | { |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1123 | smp_mb__before_atomic(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1124 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1125 | smp_mb__after_atomic(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1126 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1127 | rpc_wake_up(&clp->cl_rpcwaitq); |
| 1128 | } |
| 1129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | /* |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1131 | * Schedule the nfs_client asynchronous state management routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | */ |
Trond Myklebust | b0d3ded | 2008-12-23 15:21:50 -0500 | [diff] [blame] | 1133 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | { |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1135 | struct task_struct *task; |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1136 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1138 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1139 | return; |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1140 | __module_get(THIS_MODULE); |
| 1141 | atomic_inc(&clp->cl_count); |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1142 | |
| 1143 | /* The rcu_read_lock() is not strictly necessary, as the state |
| 1144 | * manager is the only thread that ever changes the rpc_xprt |
| 1145 | * after it's initialized. At this point, we're single threaded. */ |
| 1146 | rcu_read_lock(); |
| 1147 | snprintf(buf, sizeof(buf), "%s-manager", |
| 1148 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
| 1149 | rcu_read_unlock(); |
Kees Cook | f170168 | 2013-07-03 15:04:58 -0700 | [diff] [blame] | 1150 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1151 | if (IS_ERR(task)) { |
| 1152 | printk(KERN_ERR "%s: kthread_run: %ld\n", |
| 1153 | __func__, PTR_ERR(task)); |
| 1154 | nfs4_clear_state_manager_bit(clp); |
| 1155 | nfs_put_client(clp); |
| 1156 | module_put(THIS_MODULE); |
| 1157 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | } |
| 1159 | |
| 1160 | /* |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1161 | * Schedule a lease recovery attempt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | */ |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1163 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | { |
| 1165 | if (!clp) |
| 1166 | return; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1167 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1168 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1169 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
| 1170 | clp->cl_hostname); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1171 | nfs4_schedule_state_manager(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | } |
Andy Adamson | 9cb8196 | 2012-03-07 10:49:41 -0500 | [diff] [blame] | 1173 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 1175 | /** |
| 1176 | * nfs4_schedule_migration_recovery - trigger migration recovery |
| 1177 | * |
| 1178 | * @server: FSID that is migrating |
| 1179 | * |
| 1180 | * Returns zero if recovery has started, otherwise a negative NFS4ERR |
| 1181 | * value is returned. |
| 1182 | */ |
| 1183 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) |
| 1184 | { |
| 1185 | struct nfs_client *clp = server->nfs_client; |
| 1186 | |
| 1187 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { |
| 1188 | pr_err("NFS: volatile file handles not supported (server %s)\n", |
| 1189 | clp->cl_hostname); |
| 1190 | return -NFS4ERR_IO; |
| 1191 | } |
| 1192 | |
| 1193 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) |
| 1194 | return -NFS4ERR_IO; |
| 1195 | |
| 1196 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", |
| 1197 | __func__, |
| 1198 | (unsigned long long)server->fsid.major, |
| 1199 | (unsigned long long)server->fsid.minor, |
| 1200 | clp->cl_hostname); |
| 1201 | |
| 1202 | set_bit(NFS_MIG_IN_TRANSITION, |
| 1203 | &((struct nfs_server *)server)->mig_status); |
| 1204 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); |
| 1205 | |
| 1206 | nfs4_schedule_state_manager(clp); |
| 1207 | return 0; |
| 1208 | } |
| 1209 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); |
| 1210 | |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 1211 | /** |
| 1212 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery |
| 1213 | * |
| 1214 | * @clp: server to check for moved leases |
| 1215 | * |
| 1216 | */ |
| 1217 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) |
| 1218 | { |
| 1219 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", |
| 1220 | __func__, clp->cl_clientid, clp->cl_hostname); |
| 1221 | |
| 1222 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); |
| 1223 | nfs4_schedule_state_manager(clp); |
| 1224 | } |
| 1225 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); |
| 1226 | |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1227 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
| 1228 | { |
| 1229 | int res; |
| 1230 | |
| 1231 | might_sleep(); |
| 1232 | |
Chuck Lever | 0625c2d | 2013-10-17 14:14:10 -0400 | [diff] [blame] | 1233 | atomic_inc(&clp->cl_count); |
NeilBrown | 7431620 | 2014-07-07 15:16:04 +1000 | [diff] [blame] | 1234 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
| 1235 | nfs_wait_bit_killable, TASK_KILLABLE); |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1236 | if (res) |
Chuck Lever | 0625c2d | 2013-10-17 14:14:10 -0400 | [diff] [blame] | 1237 | goto out; |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1238 | if (clp->cl_cons_state < 0) |
Chuck Lever | 0625c2d | 2013-10-17 14:14:10 -0400 | [diff] [blame] | 1239 | res = clp->cl_cons_state; |
| 1240 | out: |
| 1241 | nfs_put_client(clp); |
| 1242 | return res; |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1243 | } |
| 1244 | |
| 1245 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) |
| 1246 | { |
| 1247 | unsigned int loop; |
| 1248 | int ret; |
| 1249 | |
| 1250 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
| 1251 | ret = nfs4_wait_clnt_recover(clp); |
| 1252 | if (ret != 0) |
| 1253 | break; |
| 1254 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
| 1255 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) |
| 1256 | break; |
| 1257 | nfs4_schedule_state_manager(clp); |
| 1258 | ret = -EIO; |
| 1259 | } |
| 1260 | return ret; |
| 1261 | } |
| 1262 | |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1263 | /* |
| 1264 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN |
| 1265 | * @clp: client to process |
| 1266 | * |
| 1267 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a |
| 1268 | * resend of the SETCLIENTID and hence re-establish the |
| 1269 | * callback channel. Then return all existing delegations. |
| 1270 | */ |
| 1271 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) |
| 1272 | { |
| 1273 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1274 | nfs_expire_all_delegations(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1275 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
| 1276 | clp->cl_hostname); |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1277 | } |
| 1278 | |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1279 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
| 1280 | { |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1281 | nfs40_handle_cb_pathdown(clp); |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1282 | nfs4_schedule_state_manager(clp); |
| 1283 | } |
| 1284 | |
Trond Myklebust | f9feab1 | 2011-03-09 16:12:46 -0500 | [diff] [blame] | 1285 | 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] | 1286 | { |
| 1287 | |
| 1288 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1289 | /* Don't recover state that expired before the reboot */ |
| 1290 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { |
| 1291 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1292 | return 0; |
| 1293 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1294 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1295 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 1296 | return 1; |
| 1297 | } |
| 1298 | |
Trond Myklebust | 4f14c19 | 2014-02-12 19:15:06 -0500 | [diff] [blame] | 1299 | 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] | 1300 | { |
| 1301 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 1302 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1303 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1304 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
| 1305 | return 1; |
| 1306 | } |
| 1307 | |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1308 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1309 | { |
| 1310 | struct nfs_client *clp = server->nfs_client; |
| 1311 | |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1312 | if (!nfs4_valid_open_stateid(state)) |
| 1313 | return -EBADF; |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1314 | nfs4_state_mark_reclaim_nograce(clp, state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1315 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
| 1316 | clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1317 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1318 | return 0; |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1319 | } |
Andy Adamson | 9cb8196 | 2012-03-07 10:49:41 -0500 | [diff] [blame] | 1320 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1321 | |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1322 | void nfs_inode_find_state_and_recover(struct inode *inode, |
| 1323 | const nfs4_stateid *stateid) |
| 1324 | { |
| 1325 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; |
| 1326 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1327 | struct nfs_open_context *ctx; |
| 1328 | struct nfs4_state *state; |
| 1329 | bool found = false; |
| 1330 | |
| 1331 | spin_lock(&inode->i_lock); |
| 1332 | list_for_each_entry(ctx, &nfsi->open_files, list) { |
| 1333 | state = ctx->state; |
| 1334 | if (state == NULL) |
| 1335 | continue; |
| 1336 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| 1337 | continue; |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 1338 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1339 | continue; |
| 1340 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1341 | found = true; |
| 1342 | } |
| 1343 | spin_unlock(&inode->i_lock); |
| 1344 | if (found) |
| 1345 | nfs4_schedule_state_manager(clp); |
| 1346 | } |
| 1347 | |
Trond Myklebust | c58c844 | 2013-03-18 19:45:14 -0400 | [diff] [blame] | 1348 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) |
| 1349 | { |
| 1350 | struct inode *inode = state->inode; |
| 1351 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1352 | struct nfs_open_context *ctx; |
| 1353 | |
| 1354 | spin_lock(&inode->i_lock); |
| 1355 | list_for_each_entry(ctx, &nfsi->open_files, list) { |
| 1356 | if (ctx->state != state) |
| 1357 | continue; |
| 1358 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); |
| 1359 | } |
| 1360 | spin_unlock(&inode->i_lock); |
| 1361 | } |
| 1362 | |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1363 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
| 1364 | { |
| 1365 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); |
Trond Myklebust | c58c844 | 2013-03-18 19:45:14 -0400 | [diff] [blame] | 1366 | nfs4_state_mark_open_context_bad(state); |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1367 | } |
| 1368 | |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1369 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1370 | 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] | 1371 | { |
| 1372 | struct inode *inode = state->inode; |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1373 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | struct file_lock *fl; |
| 1375 | int status = 0; |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1376 | struct file_lock_context *flctx = inode->i_flctx; |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1377 | struct list_head *list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1379 | if (flctx == NULL) |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1380 | return 0; |
| 1381 | |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1382 | list = &flctx->flc_posix; |
| 1383 | |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1384 | /* Guard against delegation returns and new lock/unlock calls */ |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1385 | down_write(&nfsi->rwsem); |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1386 | spin_lock(&flctx->flc_lock); |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1387 | restart: |
| 1388 | list_for_each_entry(fl, list, fl_list) { |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1389 | if (nfs_file_open_context(fl->fl_file)->state != state) |
| 1390 | continue; |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1391 | spin_unlock(&flctx->flc_lock); |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1392 | status = ops->recover_lock(state, fl); |
| 1393 | switch (status) { |
| 1394 | case 0: |
| 1395 | break; |
| 1396 | case -ESTALE: |
| 1397 | case -NFS4ERR_ADMIN_REVOKED: |
| 1398 | case -NFS4ERR_STALE_STATEID: |
| 1399 | case -NFS4ERR_BAD_STATEID: |
| 1400 | case -NFS4ERR_EXPIRED: |
| 1401 | case -NFS4ERR_NO_GRACE: |
| 1402 | case -NFS4ERR_STALE_CLIENTID: |
| 1403 | case -NFS4ERR_BADSESSION: |
| 1404 | case -NFS4ERR_BADSLOT: |
| 1405 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1406 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1407 | goto out; |
| 1408 | default: |
| 1409 | pr_err("NFS: %s: unhandled error %d\n", |
| 1410 | __func__, status); |
| 1411 | case -ENOMEM: |
| 1412 | case -NFS4ERR_DENIED: |
| 1413 | case -NFS4ERR_RECLAIM_BAD: |
| 1414 | case -NFS4ERR_RECLAIM_CONFLICT: |
| 1415 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
| 1416 | status = 0; |
| 1417 | } |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1418 | spin_lock(&flctx->flc_lock); |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1419 | } |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1420 | if (list == &flctx->flc_posix) { |
| 1421 | list = &flctx->flc_flock; |
| 1422 | goto restart; |
| 1423 | } |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1424 | spin_unlock(&flctx->flc_lock); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1425 | out: |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1426 | up_write(&nfsi->rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | return status; |
| 1428 | } |
| 1429 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1430 | 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] | 1431 | { |
| 1432 | struct nfs4_state *state; |
| 1433 | struct nfs4_lock_state *lock; |
| 1434 | int status = 0; |
| 1435 | |
| 1436 | /* Note: we rely on the sp->so_states list being ordered |
| 1437 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) |
| 1438 | * states first. |
| 1439 | * This is needed to ensure that the server won't give us any |
| 1440 | * read delegations that we have to return if, say, we are |
| 1441 | * recovering after a network partition or a reboot from a |
| 1442 | * server that doesn't support a grace period. |
| 1443 | */ |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1444 | spin_lock(&sp->so_lock); |
Trond Myklebust | abbec2da | 2014-06-05 10:42:37 -0400 | [diff] [blame] | 1445 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1446 | restart: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1448 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
| 1449 | continue; |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1450 | if (!nfs4_valid_open_stateid(state)) |
| 1451 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | if (state->state == 0) |
| 1453 | continue; |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1454 | atomic_inc(&state->count); |
| 1455 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | status = ops->recover_open(sp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | if (status >= 0) { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1458 | status = nfs4_reclaim_locks(state, ops); |
| 1459 | if (status >= 0) { |
Jeff Layton | 1acd1c3 | 2013-10-31 13:03:04 -0400 | [diff] [blame] | 1460 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
NeilBrown | 6686390 | 2013-08-12 16:52:47 +1000 | [diff] [blame] | 1461 | spin_lock(&state->state_lock); |
| 1462 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
| 1463 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
| 1464 | pr_warn_ratelimited("NFS: " |
| 1465 | "%s: Lock reclaim " |
| 1466 | "failed!\n", __func__); |
| 1467 | } |
| 1468 | spin_unlock(&state->state_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1469 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1470 | nfs4_put_open_state(state); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1471 | spin_lock(&sp->so_lock); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1472 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | } |
| 1475 | switch (status) { |
| 1476 | default: |
Andy Adamson | 3660cd4 | 2013-10-03 12:23:24 -0400 | [diff] [blame] | 1477 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", |
| 1478 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | case -ENOENT: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1480 | case -ENOMEM: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1481 | case -ESTALE: |
Andy Adamson | 3660cd4 | 2013-10-03 12:23:24 -0400 | [diff] [blame] | 1482 | /* Open state on this file cannot be recovered */ |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1483 | nfs4_state_mark_recovery_failed(state, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | break; |
Trond Myklebust | 91876b1 | 2013-03-28 14:01:33 -0400 | [diff] [blame] | 1485 | case -EAGAIN: |
| 1486 | ssleep(1); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1487 | case -NFS4ERR_ADMIN_REVOKED: |
| 1488 | case -NFS4ERR_STALE_STATEID: |
| 1489 | case -NFS4ERR_BAD_STATEID: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1490 | case -NFS4ERR_RECLAIM_BAD: |
| 1491 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1492 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1493 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | case -NFS4ERR_EXPIRED: |
| 1495 | case -NFS4ERR_NO_GRACE: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1496 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1498 | case -NFS4ERR_BADSESSION: |
| 1499 | case -NFS4ERR_BADSLOT: |
| 1500 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1501 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | goto out_err; |
| 1503 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1504 | nfs4_put_open_state(state); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1505 | spin_lock(&sp->so_lock); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1506 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | } |
Trond Myklebust | abbec2da | 2014-06-05 10:42:37 -0400 | [diff] [blame] | 1508 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1509 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | return 0; |
| 1511 | out_err: |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1512 | nfs4_put_open_state(state); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1513 | spin_lock(&sp->so_lock); |
Trond Myklebust | abbec2da | 2014-06-05 10:42:37 -0400 | [diff] [blame] | 1514 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1515 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | return status; |
| 1517 | } |
| 1518 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1519 | static void nfs4_clear_open_state(struct nfs4_state *state) |
| 1520 | { |
| 1521 | struct nfs4_lock_state *lock; |
| 1522 | |
| 1523 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1524 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1525 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1526 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1527 | spin_lock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1528 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1529 | lock->ls_seqid.flags = 0; |
Trond Myklebust | 795a88c | 2012-09-10 13:26:49 -0400 | [diff] [blame] | 1530 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1531 | } |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1532 | spin_unlock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1533 | } |
| 1534 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1535 | static void nfs4_reset_seqids(struct nfs_server *server, |
| 1536 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1537 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1538 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1539 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1540 | struct rb_node *pos; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1541 | struct nfs4_state *state; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1542 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1543 | spin_lock(&clp->cl_lock); |
| 1544 | for (pos = rb_first(&server->state_owners); |
| 1545 | pos != NULL; |
| 1546 | pos = rb_next(pos)) { |
| 1547 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1548 | sp->so_seqid.flags = 0; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1549 | spin_lock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1550 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1551 | if (mark_reclaim(clp, state)) |
| 1552 | nfs4_clear_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1553 | } |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1554 | spin_unlock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1555 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1556 | spin_unlock(&clp->cl_lock); |
| 1557 | } |
| 1558 | |
| 1559 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, |
| 1560 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
| 1561 | { |
| 1562 | struct nfs_server *server; |
| 1563 | |
| 1564 | rcu_read_lock(); |
| 1565 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1566 | nfs4_reset_seqids(server, mark_reclaim); |
| 1567 | rcu_read_unlock(); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1568 | } |
| 1569 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1570 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
| 1571 | { |
| 1572 | /* Mark all delegations for reclaim */ |
| 1573 | nfs_delegation_mark_reclaim(clp); |
| 1574 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); |
| 1575 | } |
| 1576 | |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1577 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1578 | const struct nfs4_state_recovery_ops *ops, |
| 1579 | struct rpc_cred *cred) |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1580 | { |
| 1581 | /* Notify the server we're done reclaiming our state */ |
| 1582 | if (ops->reclaim_complete) |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1583 | (void)ops->reclaim_complete(clp, cred); |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1584 | } |
| 1585 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1586 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1587 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1588 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1589 | struct nfs4_state_owner *sp; |
| 1590 | struct rb_node *pos; |
| 1591 | struct nfs4_state *state; |
| 1592 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1593 | spin_lock(&clp->cl_lock); |
| 1594 | for (pos = rb_first(&server->state_owners); |
| 1595 | pos != NULL; |
| 1596 | pos = rb_next(pos)) { |
| 1597 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1598 | spin_lock(&sp->so_lock); |
| 1599 | list_for_each_entry(state, &sp->so_states, open_states) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1600 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
| 1601 | &state->flags)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1602 | continue; |
| 1603 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1604 | } |
| 1605 | spin_unlock(&sp->so_lock); |
| 1606 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1607 | spin_unlock(&clp->cl_lock); |
| 1608 | } |
| 1609 | |
| 1610 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
| 1611 | { |
| 1612 | struct nfs_server *server; |
| 1613 | |
| 1614 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1615 | return 0; |
| 1616 | |
| 1617 | rcu_read_lock(); |
| 1618 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1619 | nfs4_clear_reclaim_server(server); |
| 1620 | rcu_read_unlock(); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1621 | |
| 1622 | nfs_delegation_reap_unclaimed(clp); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1623 | return 1; |
| 1624 | } |
| 1625 | |
| 1626 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
| 1627 | { |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1628 | const struct nfs4_state_recovery_ops *ops; |
| 1629 | struct rpc_cred *cred; |
| 1630 | |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1631 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
| 1632 | return; |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1633 | ops = clp->cl_mvops->reboot_recovery_ops; |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 1634 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1635 | nfs4_reclaim_complete(clp, ops, cred); |
| 1636 | put_rpccred(cred); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1637 | } |
| 1638 | |
| 1639 | static void nfs_delegation_clear_all(struct nfs_client *clp) |
| 1640 | { |
| 1641 | nfs_delegation_mark_reclaim(clp); |
| 1642 | nfs_delegation_reap_unclaimed(clp); |
| 1643 | } |
| 1644 | |
| 1645 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
| 1646 | { |
| 1647 | nfs_delegation_clear_all(clp); |
| 1648 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 1649 | } |
| 1650 | |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1651 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1652 | { |
| 1653 | switch (error) { |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1654 | case 0: |
| 1655 | break; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1656 | case -NFS4ERR_CB_PATH_DOWN: |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1657 | nfs40_handle_cb_pathdown(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1658 | break; |
Trond Myklebust | c8b7ae3d | 2009-12-03 15:53:21 -0500 | [diff] [blame] | 1659 | case -NFS4ERR_NO_GRACE: |
| 1660 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1661 | break; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1662 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1663 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1664 | nfs4_state_clear_reclaim_reboot(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1665 | nfs4_state_start_reclaim_reboot(clp); |
| 1666 | break; |
| 1667 | case -NFS4ERR_EXPIRED: |
| 1668 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1669 | nfs4_state_start_reclaim_nograce(clp); |
Andy Adamson | 8ba9bf8 | 2009-12-04 15:55:34 -0500 | [diff] [blame] | 1670 | break; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1671 | case -NFS4ERR_BADSESSION: |
| 1672 | case -NFS4ERR_BADSLOT: |
| 1673 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1674 | case -NFS4ERR_DEADSESSION: |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1675 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 1676 | case -NFS4ERR_SEQ_MISORDERED: |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1677 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 0b9e2d4 | 2009-12-04 16:02:14 -0500 | [diff] [blame] | 1678 | /* Zero session reset errors */ |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1679 | break; |
Trond Myklebust | 7c5d725 | 2012-05-27 12:58:48 -0400 | [diff] [blame] | 1680 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1681 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 1682 | break; |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1683 | default: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1684 | dprintk("%s: failed to handle error %d for server %s\n", |
| 1685 | __func__, error, clp->cl_hostname); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1686 | return error; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1687 | } |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1688 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
| 1689 | clp->cl_hostname); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1690 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1691 | } |
| 1692 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1693 | 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] | 1694 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1695 | struct nfs4_state_owner *sp; |
| 1696 | struct nfs_server *server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1697 | struct rb_node *pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | int status = 0; |
| 1699 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1700 | restart: |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1701 | rcu_read_lock(); |
| 1702 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 1703 | nfs4_purge_state_owners(server); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1704 | spin_lock(&clp->cl_lock); |
| 1705 | for (pos = rb_first(&server->state_owners); |
| 1706 | pos != NULL; |
| 1707 | pos = rb_next(pos)) { |
| 1708 | sp = rb_entry(pos, |
| 1709 | struct nfs4_state_owner, so_server_node); |
| 1710 | if (!test_and_clear_bit(ops->owner_flag_bit, |
| 1711 | &sp->so_flags)) |
| 1712 | continue; |
| 1713 | atomic_inc(&sp->so_count); |
| 1714 | spin_unlock(&clp->cl_lock); |
| 1715 | rcu_read_unlock(); |
| 1716 | |
| 1717 | status = nfs4_reclaim_open_state(sp, ops); |
| 1718 | if (status < 0) { |
| 1719 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
| 1720 | nfs4_put_state_owner(sp); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 1721 | status = nfs4_recovery_handle_error(clp, status); |
| 1722 | return (status != 0) ? status : -EAGAIN; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1723 | } |
| 1724 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1725 | nfs4_put_state_owner(sp); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1726 | goto restart; |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1727 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1728 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1729 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1730 | rcu_read_unlock(); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 1731 | return 0; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1732 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1734 | static int nfs4_check_lease(struct nfs_client *clp) |
| 1735 | { |
| 1736 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1737 | const struct nfs4_state_maintenance_ops *ops = |
| 1738 | clp->cl_mvops->state_renewal_ops; |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1739 | int status; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1740 | |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1741 | /* Is the client already known to have an expired lease? */ |
| 1742 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1743 | return 0; |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 1744 | spin_lock(&clp->cl_lock); |
| 1745 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1746 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1747 | if (cred == NULL) { |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 1748 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1749 | status = -ENOKEY; |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1750 | if (cred == NULL) |
| 1751 | goto out; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1752 | } |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1753 | status = ops->renew_lease(clp, cred); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1754 | put_rpccred(cred); |
Trond Myklebust | bc7a05c | 2013-04-08 17:50:28 -0400 | [diff] [blame] | 1755 | if (status == -ETIMEDOUT) { |
| 1756 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 1757 | return 0; |
| 1758 | } |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1759 | out: |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1760 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1761 | } |
| 1762 | |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1763 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
| 1764 | * and for recoverable errors on EXCHANGE_ID for v4.1 |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1765 | */ |
| 1766 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) |
| 1767 | { |
| 1768 | switch (status) { |
Trond Myklebust | 89a2173 | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1769 | case -NFS4ERR_SEQ_MISORDERED: |
| 1770 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) |
| 1771 | return -ESERVERFAULT; |
| 1772 | /* Lease confirmation error: retry after purging the lease */ |
| 1773 | ssleep(1); |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1774 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 1775 | break; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1776 | case -NFS4ERR_STALE_CLIENTID: |
| 1777 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1778 | nfs4_state_start_reclaim_reboot(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1779 | break; |
Chuck Lever | de73483 | 2012-07-11 16:30:50 -0400 | [diff] [blame] | 1780 | case -NFS4ERR_CLID_INUSE: |
| 1781 | pr_err("NFS: Server %s reports our clientid is in use\n", |
| 1782 | clp->cl_hostname); |
| 1783 | nfs_mark_client_ready(clp, -EPERM); |
| 1784 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 1785 | return -EPERM; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1786 | case -EACCES: |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1787 | case -NFS4ERR_DELAY: |
| 1788 | case -ETIMEDOUT: |
| 1789 | case -EAGAIN: |
| 1790 | ssleep(1); |
| 1791 | break; |
| 1792 | |
| 1793 | case -NFS4ERR_MINOR_VERS_MISMATCH: |
| 1794 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) |
| 1795 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1796 | dprintk("%s: exit with error %d for server %s\n", |
| 1797 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1798 | return -EPROTONOSUPPORT; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1799 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 1800 | * in nfs4_exchange_id */ |
| 1801 | default: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1802 | dprintk("%s: exit with error %d for server %s\n", __func__, |
| 1803 | status, clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1804 | return status; |
| 1805 | } |
| 1806 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1807 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
| 1808 | clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1809 | return 0; |
| 1810 | } |
| 1811 | |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1812 | static int nfs4_establish_lease(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1813 | { |
| 1814 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1815 | const struct nfs4_state_recovery_ops *ops = |
| 1816 | clp->cl_mvops->reboot_recovery_ops; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1817 | int status; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1818 | |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 1819 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1820 | if (cred == NULL) |
| 1821 | return -ENOENT; |
| 1822 | status = ops->establish_clid(clp, cred); |
| 1823 | put_rpccred(cred); |
| 1824 | if (status != 0) |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1825 | return status; |
| 1826 | pnfs_destroy_all_layouts(clp); |
| 1827 | return 0; |
| 1828 | } |
| 1829 | |
Chuck Lever | 6bbb4ae | 2012-07-11 16:30:59 -0400 | [diff] [blame] | 1830 | /* |
| 1831 | * Returns zero or a negative errno. NFS4ERR values are converted |
| 1832 | * to local errno values. |
| 1833 | */ |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1834 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
| 1835 | { |
| 1836 | int status; |
| 1837 | |
| 1838 | status = nfs4_establish_lease(clp); |
| 1839 | if (status < 0) |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1840 | return nfs4_handle_reclaim_lease_error(clp, status); |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1841 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) |
| 1842 | nfs4_state_start_reclaim_nograce(clp); |
| 1843 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 1844 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 1845 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 1846 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1847 | return 0; |
| 1848 | } |
| 1849 | |
| 1850 | static int nfs4_purge_lease(struct nfs_client *clp) |
| 1851 | { |
| 1852 | int status; |
| 1853 | |
| 1854 | status = nfs4_establish_lease(clp); |
| 1855 | if (status < 0) |
| 1856 | return nfs4_handle_reclaim_lease_error(clp, status); |
| 1857 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
| 1858 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1859 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1860 | return 0; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1861 | } |
| 1862 | |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 1863 | /* |
| 1864 | * Try remote migration of one FSID from a source server to a |
| 1865 | * destination server. The source server provides a list of |
| 1866 | * potential destinations. |
| 1867 | * |
| 1868 | * Returns zero or a negative NFS4ERR status code. |
| 1869 | */ |
| 1870 | static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) |
| 1871 | { |
| 1872 | struct nfs_client *clp = server->nfs_client; |
| 1873 | struct nfs4_fs_locations *locations = NULL; |
| 1874 | struct inode *inode; |
| 1875 | struct page *page; |
| 1876 | int status, result; |
| 1877 | |
| 1878 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, |
| 1879 | (unsigned long long)server->fsid.major, |
| 1880 | (unsigned long long)server->fsid.minor, |
| 1881 | clp->cl_hostname); |
| 1882 | |
| 1883 | result = 0; |
| 1884 | page = alloc_page(GFP_KERNEL); |
| 1885 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); |
| 1886 | if (page == NULL || locations == NULL) { |
| 1887 | dprintk("<-- %s: no memory\n", __func__); |
| 1888 | goto out; |
| 1889 | } |
| 1890 | |
| 1891 | inode = server->super->s_root->d_inode; |
| 1892 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
| 1893 | if (result) { |
| 1894 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", |
| 1895 | __func__, result); |
| 1896 | goto out; |
| 1897 | } |
| 1898 | |
| 1899 | result = -NFS4ERR_NXIO; |
| 1900 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { |
| 1901 | dprintk("<-- %s: No fs_locations data, migration skipped\n", |
| 1902 | __func__); |
| 1903 | goto out; |
| 1904 | } |
| 1905 | |
| 1906 | nfs4_begin_drain_session(clp); |
| 1907 | |
| 1908 | status = nfs4_replace_transport(server, locations); |
| 1909 | if (status != 0) { |
| 1910 | dprintk("<-- %s: failed to replace transport: %d\n", |
| 1911 | __func__, status); |
| 1912 | goto out; |
| 1913 | } |
| 1914 | |
| 1915 | result = 0; |
| 1916 | dprintk("<-- %s: migration succeeded\n", __func__); |
| 1917 | |
| 1918 | out: |
| 1919 | if (page != NULL) |
| 1920 | __free_page(page); |
| 1921 | kfree(locations); |
| 1922 | if (result) { |
| 1923 | pr_err("NFS: migration recovery failed (server %s)\n", |
| 1924 | clp->cl_hostname); |
| 1925 | set_bit(NFS_MIG_FAILED, &server->mig_status); |
| 1926 | } |
| 1927 | return result; |
| 1928 | } |
| 1929 | |
| 1930 | /* |
| 1931 | * Returns zero or a negative NFS4ERR status code. |
| 1932 | */ |
| 1933 | static int nfs4_handle_migration(struct nfs_client *clp) |
| 1934 | { |
| 1935 | const struct nfs4_state_maintenance_ops *ops = |
| 1936 | clp->cl_mvops->state_renewal_ops; |
| 1937 | struct nfs_server *server; |
| 1938 | struct rpc_cred *cred; |
| 1939 | |
| 1940 | dprintk("%s: migration reported on \"%s\"\n", __func__, |
| 1941 | clp->cl_hostname); |
| 1942 | |
| 1943 | spin_lock(&clp->cl_lock); |
| 1944 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1945 | spin_unlock(&clp->cl_lock); |
| 1946 | if (cred == NULL) |
| 1947 | return -NFS4ERR_NOENT; |
| 1948 | |
| 1949 | clp->cl_mig_gen++; |
| 1950 | restart: |
| 1951 | rcu_read_lock(); |
| 1952 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 1953 | int status; |
| 1954 | |
| 1955 | if (server->mig_gen == clp->cl_mig_gen) |
| 1956 | continue; |
| 1957 | server->mig_gen = clp->cl_mig_gen; |
| 1958 | |
| 1959 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, |
| 1960 | &server->mig_status)) |
| 1961 | continue; |
| 1962 | |
| 1963 | rcu_read_unlock(); |
| 1964 | status = nfs4_try_migration(server, cred); |
| 1965 | if (status < 0) { |
| 1966 | put_rpccred(cred); |
| 1967 | return status; |
| 1968 | } |
| 1969 | goto restart; |
| 1970 | } |
| 1971 | rcu_read_unlock(); |
| 1972 | put_rpccred(cred); |
| 1973 | return 0; |
| 1974 | } |
| 1975 | |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 1976 | /* |
| 1977 | * Test each nfs_server on the clp's cl_superblocks list to see |
| 1978 | * if it's moved to another server. Stop when the server no longer |
| 1979 | * returns NFS4ERR_LEASE_MOVED. |
| 1980 | */ |
| 1981 | static int nfs4_handle_lease_moved(struct nfs_client *clp) |
| 1982 | { |
| 1983 | const struct nfs4_state_maintenance_ops *ops = |
| 1984 | clp->cl_mvops->state_renewal_ops; |
| 1985 | struct nfs_server *server; |
| 1986 | struct rpc_cred *cred; |
| 1987 | |
| 1988 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, |
| 1989 | clp->cl_hostname); |
| 1990 | |
| 1991 | spin_lock(&clp->cl_lock); |
| 1992 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1993 | spin_unlock(&clp->cl_lock); |
| 1994 | if (cred == NULL) |
| 1995 | return -NFS4ERR_NOENT; |
| 1996 | |
| 1997 | clp->cl_mig_gen++; |
| 1998 | restart: |
| 1999 | rcu_read_lock(); |
| 2000 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 2001 | struct inode *inode; |
| 2002 | int status; |
| 2003 | |
| 2004 | if (server->mig_gen == clp->cl_mig_gen) |
| 2005 | continue; |
| 2006 | server->mig_gen = clp->cl_mig_gen; |
| 2007 | |
| 2008 | rcu_read_unlock(); |
| 2009 | |
| 2010 | inode = server->super->s_root->d_inode; |
| 2011 | status = nfs4_proc_fsid_present(inode, cred); |
| 2012 | if (status != -NFS4ERR_MOVED) |
| 2013 | goto restart; /* wasn't this one */ |
| 2014 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) |
| 2015 | goto restart; /* there are more */ |
| 2016 | goto out; |
| 2017 | } |
| 2018 | rcu_read_unlock(); |
| 2019 | |
| 2020 | out: |
| 2021 | put_rpccred(cred); |
| 2022 | return 0; |
| 2023 | } |
| 2024 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2025 | /** |
| 2026 | * nfs4_discover_server_trunking - Detect server IP address trunking |
| 2027 | * |
| 2028 | * @clp: nfs_client under test |
| 2029 | * @result: OUT: found nfs_client, or clp |
| 2030 | * |
| 2031 | * Returns zero or a negative errno. If zero is returned, |
| 2032 | * an nfs_client pointer is planted in "result". |
| 2033 | * |
| 2034 | * Note: since we are invoked in process context, and |
| 2035 | * not from inside the state manager, we cannot use |
| 2036 | * nfs4_handle_reclaim_lease_error(). |
| 2037 | */ |
| 2038 | int nfs4_discover_server_trunking(struct nfs_client *clp, |
| 2039 | struct nfs_client **result) |
| 2040 | { |
| 2041 | const struct nfs4_state_recovery_ops *ops = |
| 2042 | clp->cl_mvops->reboot_recovery_ops; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2043 | struct rpc_clnt *clnt; |
| 2044 | struct rpc_cred *cred; |
Chuck Lever | 4edaa30 | 2013-03-16 15:56:20 -0400 | [diff] [blame] | 2045 | int i, status; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2046 | |
| 2047 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); |
| 2048 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2049 | clnt = clp->cl_rpcclient; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2050 | i = 0; |
| 2051 | |
| 2052 | mutex_lock(&nfs_clid_init_mutex); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2053 | again: |
Trond Myklebust | ea33e6c | 2013-04-05 13:22:50 -0400 | [diff] [blame] | 2054 | status = -ENOENT; |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 2055 | cred = nfs4_get_clid_cred(clp); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2056 | if (cred == NULL) |
| 2057 | goto out_unlock; |
| 2058 | |
| 2059 | status = ops->detect_trunking(clp, result, cred); |
| 2060 | put_rpccred(cred); |
| 2061 | switch (status) { |
| 2062 | case 0: |
| 2063 | break; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2064 | case -ETIMEDOUT: |
Trond Myklebust | 150e726 | 2014-03-18 14:23:11 -0400 | [diff] [blame] | 2065 | if (clnt->cl_softrtry) |
| 2066 | break; |
| 2067 | case -NFS4ERR_DELAY: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2068 | case -EAGAIN: |
| 2069 | ssleep(1); |
Trond Myklebust | 202c312 | 2013-01-18 22:56:23 -0500 | [diff] [blame] | 2070 | case -NFS4ERR_STALE_CLIENTID: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2071 | dprintk("NFS: %s after status %d, retrying\n", |
| 2072 | __func__, status); |
| 2073 | goto again; |
Chuck Lever | 4edaa30 | 2013-03-16 15:56:20 -0400 | [diff] [blame] | 2074 | case -EACCES: |
Chuck Lever | d688f7b | 2013-07-24 12:28:28 -0400 | [diff] [blame] | 2075 | if (i++ == 0) { |
| 2076 | nfs4_root_machine_cred(clp); |
| 2077 | goto again; |
| 2078 | } |
Jeff Layton | 6d769f1 | 2013-11-13 09:08:21 -0500 | [diff] [blame] | 2079 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
Chuck Lever | 4edaa30 | 2013-03-16 15:56:20 -0400 | [diff] [blame] | 2080 | break; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2081 | case -NFS4ERR_CLID_INUSE: |
| 2082 | case -NFS4ERR_WRONGSEC: |
Jeff Layton | 6d769f1 | 2013-11-13 09:08:21 -0500 | [diff] [blame] | 2083 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
| 2084 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { |
| 2085 | status = -EPERM; |
| 2086 | break; |
| 2087 | } |
Chuck Lever | 79d852b | 2013-04-22 15:42:48 -0400 | [diff] [blame] | 2088 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2089 | if (IS_ERR(clnt)) { |
| 2090 | status = PTR_ERR(clnt); |
| 2091 | break; |
| 2092 | } |
Trond Myklebust | b193d59 | 2013-04-04 15:55:00 -0400 | [diff] [blame] | 2093 | /* Note: this is safe because we haven't yet marked the |
| 2094 | * client as ready, so we are the only user of |
| 2095 | * clp->cl_rpcclient |
| 2096 | */ |
| 2097 | clnt = xchg(&clp->cl_rpcclient, clnt); |
| 2098 | rpc_shutdown_client(clnt); |
| 2099 | clnt = clp->cl_rpcclient; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2100 | goto again; |
| 2101 | |
| 2102 | case -NFS4ERR_MINOR_VERS_MISMATCH: |
| 2103 | status = -EPROTONOSUPPORT; |
| 2104 | break; |
| 2105 | |
| 2106 | case -EKEYEXPIRED: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2107 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 2108 | * in nfs4_exchange_id */ |
| 2109 | status = -EKEYEXPIRED; |
Trond Myklebust | ea33e6c | 2013-04-05 13:22:50 -0400 | [diff] [blame] | 2110 | break; |
| 2111 | default: |
| 2112 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", |
| 2113 | __func__, status); |
| 2114 | status = -EIO; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2115 | } |
| 2116 | |
| 2117 | out_unlock: |
| 2118 | mutex_unlock(&nfs_clid_init_mutex); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2119 | dprintk("NFS: %s: status = %d\n", __func__, status); |
| 2120 | return status; |
| 2121 | } |
| 2122 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2123 | #ifdef CONFIG_NFS_V4_1 |
Trond Myklebust | 9f59479 | 2012-05-27 13:02:53 -0400 | [diff] [blame] | 2124 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2125 | { |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 2126 | struct nfs_client *clp = session->clp; |
| 2127 | |
Trond Myklebust | 9f59479 | 2012-05-27 13:02:53 -0400 | [diff] [blame] | 2128 | switch (err) { |
| 2129 | default: |
| 2130 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 2131 | break; |
| 2132 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 2133 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 2134 | } |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 2135 | nfs4_schedule_lease_recovery(clp); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2136 | } |
Andy Adamson | cbdabc7f | 2011-03-01 01:34:20 +0000 | [diff] [blame] | 2137 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2138 | |
Trond Myklebust | ac07483 | 2012-11-21 09:06:11 -0500 | [diff] [blame] | 2139 | static void nfs41_ping_server(struct nfs_client *clp) |
| 2140 | { |
| 2141 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ |
| 2142 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 2143 | nfs4_schedule_state_manager(clp); |
| 2144 | } |
| 2145 | |
| 2146 | void nfs41_server_notify_target_slotid_update(struct nfs_client *clp) |
| 2147 | { |
| 2148 | nfs41_ping_server(clp); |
| 2149 | } |
| 2150 | |
Trond Myklebust | c10e449 | 2012-11-26 16:16:54 -0500 | [diff] [blame] | 2151 | void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp) |
| 2152 | { |
| 2153 | nfs41_ping_server(clp); |
| 2154 | } |
| 2155 | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2156 | static void nfs4_reset_all_state(struct nfs_client *clp) |
| 2157 | { |
| 2158 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2159 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
Trond Myklebust | be0bfed | 2012-05-25 16:02:15 -0400 | [diff] [blame] | 2160 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2161 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2162 | dprintk("%s: scheduling reset of all state for server %s!\n", |
| 2163 | __func__, clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2164 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2165 | } |
| 2166 | } |
| 2167 | |
| 2168 | static void nfs41_handle_server_reboot(struct nfs_client *clp) |
| 2169 | { |
| 2170 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 2171 | nfs4_state_start_reclaim_reboot(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2172 | dprintk("%s: server %s rebooted!\n", __func__, |
| 2173 | clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2174 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2175 | } |
| 2176 | } |
| 2177 | |
| 2178 | static void nfs41_handle_state_revoked(struct nfs_client *clp) |
| 2179 | { |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2180 | nfs4_reset_all_state(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2181 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2182 | } |
| 2183 | |
| 2184 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
| 2185 | { |
| 2186 | /* This will need to handle layouts too */ |
| 2187 | nfs_expire_all_delegations(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2188 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
| 2189 | clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2190 | } |
| 2191 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2192 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2193 | { |
| 2194 | nfs_expire_all_delegations(clp); |
| 2195 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2196 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2197 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
| 2198 | clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2199 | } |
| 2200 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2201 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
| 2202 | { |
| 2203 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, |
| 2204 | &clp->cl_state) == 0) |
| 2205 | nfs4_schedule_state_manager(clp); |
| 2206 | } |
| 2207 | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 2208 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
| 2209 | { |
| 2210 | if (!flags) |
| 2211 | return; |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2212 | |
| 2213 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", |
| 2214 | __func__, clp->cl_hostname, clp->cl_clientid, flags); |
| 2215 | |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 2216 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2217 | nfs41_handle_server_reboot(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 2218 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 2219 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
Chuck Lever | d1c2331 | 2013-10-17 14:13:58 -0400 | [diff] [blame] | 2220 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2221 | nfs41_handle_state_revoked(clp); |
Chuck Lever | d1c2331 | 2013-10-17 14:13:58 -0400 | [diff] [blame] | 2222 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
| 2223 | nfs4_schedule_lease_moved_recovery(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 2224 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2225 | nfs41_handle_recallable_state_revoked(clp); |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2226 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
| 2227 | nfs41_handle_backchannel_fault(clp); |
| 2228 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
| 2229 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2230 | nfs41_handle_cb_path_down(clp); |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 2231 | } |
| 2232 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2233 | static int nfs4_reset_session(struct nfs_client *clp) |
| 2234 | { |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2235 | struct rpc_cred *cred; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2236 | int status; |
| 2237 | |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2238 | if (!nfs4_has_session(clp)) |
| 2239 | return 0; |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 2240 | nfs4_begin_drain_session(clp); |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 2241 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2242 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
Trond Myklebust | c489ee2 | 2013-01-30 13:04:10 -0500 | [diff] [blame] | 2243 | switch (status) { |
| 2244 | case 0: |
| 2245 | case -NFS4ERR_BADSESSION: |
| 2246 | case -NFS4ERR_DEADSESSION: |
| 2247 | break; |
| 2248 | case -NFS4ERR_BACK_CHAN_BUSY: |
| 2249 | case -NFS4ERR_DELAY: |
| 2250 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 2251 | status = 0; |
| 2252 | ssleep(1); |
| 2253 | goto out; |
| 2254 | default: |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 2255 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2256 | goto out; |
| 2257 | } |
| 2258 | |
| 2259 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2260 | status = nfs4_proc_create_session(clp, cred); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2261 | if (status) { |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2262 | dprintk("%s: session reset failed with status %d for server %s!\n", |
| 2263 | __func__, status, clp->cl_hostname); |
Trond Myklebust | f2c1b51 | 2012-05-27 14:46:46 -0400 | [diff] [blame] | 2264 | status = nfs4_handle_reclaim_lease_error(clp, status); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2265 | goto out; |
| 2266 | } |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 2267 | nfs41_finish_session_reset(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2268 | dprintk("%s: session reset was successful for server %s!\n", |
| 2269 | __func__, clp->cl_hostname); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2270 | out: |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2271 | if (cred) |
| 2272 | put_rpccred(cred); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2273 | return status; |
| 2274 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2275 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2276 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
| 2277 | { |
Trond Myklebust | 2cf047c | 2012-05-25 17:57:41 -0400 | [diff] [blame] | 2278 | struct rpc_cred *cred; |
| 2279 | int ret; |
| 2280 | |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2281 | if (!nfs4_has_session(clp)) |
| 2282 | return 0; |
Trond Myklebust | 43ac544 | 2012-05-27 13:47:21 -0400 | [diff] [blame] | 2283 | nfs4_begin_drain_session(clp); |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 2284 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 2cf047c | 2012-05-25 17:57:41 -0400 | [diff] [blame] | 2285 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
| 2286 | if (cred) |
| 2287 | put_rpccred(cred); |
Trond Myklebust | 43ac544 | 2012-05-27 13:47:21 -0400 | [diff] [blame] | 2288 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2289 | switch (ret) { |
| 2290 | case 0: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2291 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
| 2292 | __func__, clp->cl_hostname); |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2293 | break; |
| 2294 | case -NFS4ERR_DELAY: |
| 2295 | ssleep(1); |
| 2296 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 2297 | break; |
| 2298 | default: |
| 2299 | return nfs4_recovery_handle_error(clp, ret); |
| 2300 | } |
| 2301 | return 0; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2302 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2303 | #else /* CONFIG_NFS_V4_1 */ |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2304 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2305 | |
| 2306 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
| 2307 | { |
| 2308 | return 0; |
| 2309 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2310 | #endif /* CONFIG_NFS_V4_1 */ |
| 2311 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2312 | static void nfs4_state_manager(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2313 | { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2314 | int status = 0; |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2315 | const char *section = "", *section_sep = ""; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2316 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2317 | /* Ensure exclusive access to NFSv4 state */ |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 2318 | do { |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2319 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2320 | section = "purge state"; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2321 | status = nfs4_purge_lease(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2322 | if (status < 0) |
| 2323 | goto out_error; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2324 | continue; |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2325 | } |
| 2326 | |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2327 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2328 | section = "lease expired"; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2329 | /* We're going to have to re-establish a clientid */ |
| 2330 | status = nfs4_reclaim_lease(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2331 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2332 | goto out_error; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2333 | continue; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 2334 | } |
| 2335 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2336 | /* Initialize or reset the session */ |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2337 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2338 | section = "reset session"; |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 2339 | status = nfs4_reset_session(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2340 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 2341 | continue; |
| 2342 | if (status < 0) |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2343 | goto out_error; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2344 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2345 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2346 | /* Send BIND_CONN_TO_SESSION */ |
| 2347 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2348 | &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2349 | section = "bind conn to session"; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2350 | status = nfs4_bind_conn_to_session(clp); |
| 2351 | if (status < 0) |
| 2352 | goto out_error; |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2353 | continue; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2354 | } |
| 2355 | |
Trond Myklebust | 5df904a | 2012-11-21 09:22:14 -0500 | [diff] [blame] | 2356 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
| 2357 | section = "check lease"; |
| 2358 | status = nfs4_check_lease(clp); |
| 2359 | if (status < 0) |
| 2360 | goto out_error; |
Olga Kornievskaia | 8faaa6d | 2014-09-24 18:11:28 -0400 | [diff] [blame] | 2361 | continue; |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2362 | } |
| 2363 | |
| 2364 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { |
| 2365 | section = "migration"; |
| 2366 | status = nfs4_handle_migration(clp); |
| 2367 | if (status < 0) |
| 2368 | goto out_error; |
Trond Myklebust | 5df904a | 2012-11-21 09:22:14 -0500 | [diff] [blame] | 2369 | } |
| 2370 | |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 2371 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
| 2372 | section = "lease moved"; |
| 2373 | status = nfs4_handle_lease_moved(clp); |
| 2374 | if (status < 0) |
| 2375 | goto out_error; |
| 2376 | } |
| 2377 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2378 | /* First recover reboot state... */ |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 2379 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2380 | section = "reclaim reboot"; |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 2381 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 2382 | clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 2383 | if (status == -EAGAIN) |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2384 | continue; |
| 2385 | if (status < 0) |
| 2386 | goto out_error; |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 2387 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2388 | } |
| 2389 | |
| 2390 | /* Now recover expired state... */ |
| 2391 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2392 | section = "reclaim nograce"; |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 2393 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 2394 | clp->cl_mvops->nograce_recovery_ops); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 2395 | if (status == -EAGAIN) |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2396 | continue; |
| 2397 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2398 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2399 | } |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 2400 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 2401 | nfs4_end_drain_session(clp); |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 2402 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
| 2403 | nfs_client_return_marked_delegations(clp); |
| 2404 | continue; |
| 2405 | } |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2406 | |
| 2407 | nfs4_clear_state_manager_bit(clp); |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2408 | /* Did we race with an attempt to give us more work? */ |
| 2409 | if (clp->cl_state == 0) |
| 2410 | break; |
| 2411 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 2412 | break; |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 2413 | } while (atomic_read(&clp->cl_count) > 1); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2414 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2415 | out_error: |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2416 | if (strlen(section)) |
| 2417 | section_sep = ": "; |
| 2418 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" |
| 2419 | " with error %d\n", section_sep, section, |
| 2420 | clp->cl_hostname, -status); |
Chuck Lever | ffe5a83 | 2012-09-14 17:23:23 -0400 | [diff] [blame] | 2421 | ssleep(1); |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 2422 | nfs4_end_drain_session(clp); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2423 | nfs4_clear_state_manager_bit(clp); |
| 2424 | } |
| 2425 | |
| 2426 | static int nfs4_run_state_manager(void *ptr) |
| 2427 | { |
| 2428 | struct nfs_client *clp = ptr; |
| 2429 | |
| 2430 | allow_signal(SIGKILL); |
| 2431 | nfs4_state_manager(clp); |
| 2432 | nfs_put_client(clp); |
| 2433 | module_put_and_exit(0); |
| 2434 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | } |
| 2436 | |
| 2437 | /* |
| 2438 | * Local variables: |
| 2439 | * c-basic-offset: 8 |
| 2440 | * End: |
| 2441 | */ |