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> |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 45 | #include <linux/kthread.h> |
| 46 | #include <linux/module.h> |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 47 | #include <linux/random.h> |
Randy Dunlap | 8c7597f | 2010-10-22 16:18:52 -0700 | [diff] [blame] | 48 | #include <linux/ratelimit.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <linux/workqueue.h> |
| 50 | #include <linux/bitops.h> |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 51 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 53 | #include <linux/sunrpc/clnt.h> |
| 54 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 55 | #include "nfs4_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #include "callback.h" |
| 57 | #include "delegation.h" |
David Howells | 24c8dbb | 2006-08-22 20:06:10 -0400 | [diff] [blame] | 58 | #include "internal.h" |
Anna Schumaker | 40c64c2 | 2015-04-15 13:00:05 -0400 | [diff] [blame] | 59 | #include "nfs4idmap.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; |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 312 | status = nfs4_proc_exchange_id(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 313 | if (status != 0) |
| 314 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 315 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 316 | do_confirm: |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 317 | status = nfs4_proc_create_session(clp, cred); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 318 | if (status != 0) |
| 319 | goto out; |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 320 | nfs41_finish_session_reset(clp); |
Ricardo Labiaga | 9430fb6 | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 321 | nfs_mark_client_ready(clp, NFS_CS_READY); |
| 322 | out: |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 323 | return status; |
| 324 | } |
| 325 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 326 | /** |
| 327 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) |
| 328 | * |
| 329 | * @clp: nfs_client under test |
| 330 | * @result: OUT: found nfs_client, or clp |
| 331 | * @cred: credential to use for trunking test |
| 332 | * |
| 333 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. |
| 334 | * If NFS4_OK is returned, an nfs_client pointer is planted in |
| 335 | * "result". |
| 336 | * |
| 337 | * Note: The returned client may not yet be marked ready. |
| 338 | */ |
| 339 | int nfs41_discover_server_trunking(struct nfs_client *clp, |
| 340 | struct nfs_client **result, |
| 341 | struct rpc_cred *cred) |
| 342 | { |
| 343 | int status; |
| 344 | |
| 345 | status = nfs4_proc_exchange_id(clp, cred); |
| 346 | if (status != NFS4_OK) |
| 347 | return status; |
| 348 | |
Trond Myklebust | 48d66b9 | 2015-03-03 20:28:59 -0500 | [diff] [blame] | 349 | status = nfs41_walk_client_list(clp, result, cred); |
| 350 | if (status < 0) |
| 351 | return status; |
| 352 | if (clp != *result) |
| 353 | return 0; |
| 354 | |
Trond Myklebust | e11259f | 2015-03-03 20:35:31 -0500 | [diff] [blame] | 355 | /* Purge state if the client id was established in a prior instance */ |
| 356 | if (clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R) |
| 357 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
| 358 | else |
| 359 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Trond Myklebust | 48d66b9 | 2015-03-03 20:28:59 -0500 | [diff] [blame] | 360 | nfs4_schedule_state_manager(clp); |
| 361 | status = nfs_wait_client_init_complete(clp); |
| 362 | if (status < 0) |
| 363 | nfs_put_client(clp); |
| 364 | return status; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 365 | } |
| 366 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 367 | #endif /* CONFIG_NFS_V4_1 */ |
| 368 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 369 | /** |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 370 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 371 | * @clp: client state handle |
| 372 | * |
| 373 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 374 | */ |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 375 | struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp) |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 376 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 377 | struct rpc_cred *cred; |
| 378 | |
| 379 | spin_lock(&clp->cl_lock); |
| 380 | cred = nfs4_get_machine_cred_locked(clp); |
| 381 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 382 | return cred; |
| 383 | } |
| 384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 386 | 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] | 387 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 388 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 389 | *parent = NULL; |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 390 | struct nfs4_state_owner *sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 392 | while (*p != NULL) { |
| 393 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 394 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 395 | |
| 396 | if (cred < sp->so_cred) |
| 397 | p = &parent->rb_left; |
| 398 | else if (cred > sp->so_cred) |
| 399 | p = &parent->rb_right; |
| 400 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 401 | if (!list_empty(&sp->so_lru)) |
| 402 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 403 | atomic_inc(&sp->so_count); |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 404 | return sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 405 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | } |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 407 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 410 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 411 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 412 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 413 | struct nfs_server *server = new->so_server; |
| 414 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 415 | *parent = NULL; |
| 416 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 417 | int err; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 418 | |
| 419 | while (*p != NULL) { |
| 420 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 421 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 422 | |
| 423 | if (new->so_cred < sp->so_cred) |
| 424 | p = &parent->rb_left; |
| 425 | else if (new->so_cred > sp->so_cred) |
| 426 | p = &parent->rb_right; |
| 427 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 428 | if (!list_empty(&sp->so_lru)) |
| 429 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 430 | atomic_inc(&sp->so_count); |
| 431 | return sp; |
| 432 | } |
| 433 | } |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 434 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 435 | if (err) |
| 436 | return ERR_PTR(err); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 437 | rb_link_node(&new->so_server_node, parent, p); |
| 438 | rb_insert_color(&new->so_server_node, &server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 439 | return new; |
| 440 | } |
| 441 | |
| 442 | static void |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 443 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 444 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 445 | struct nfs_server *server = sp->so_server; |
| 446 | |
| 447 | if (!RB_EMPTY_NODE(&sp->so_server_node)) |
| 448 | rb_erase(&sp->so_server_node, &server->state_owners); |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 449 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 450 | } |
| 451 | |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 452 | static void |
| 453 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) |
| 454 | { |
Trond Myklebust | 95b72eb | 2012-04-20 19:24:51 -0400 | [diff] [blame] | 455 | sc->create_time = ktime_get(); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 456 | sc->flags = 0; |
| 457 | sc->counter = 0; |
| 458 | spin_lock_init(&sc->lock); |
| 459 | INIT_LIST_HEAD(&sc->list); |
| 460 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); |
| 461 | } |
| 462 | |
| 463 | static void |
| 464 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) |
| 465 | { |
| 466 | rpc_destroy_wait_queue(&sc->wait); |
| 467 | } |
| 468 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | /* |
| 470 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to |
| 471 | * create a new state_owner. |
| 472 | * |
| 473 | */ |
| 474 | static struct nfs4_state_owner * |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 475 | nfs4_alloc_state_owner(struct nfs_server *server, |
| 476 | struct rpc_cred *cred, |
| 477 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | { |
| 479 | struct nfs4_state_owner *sp; |
| 480 | |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 481 | sp = kzalloc(sizeof(*sp), gfp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | if (!sp) |
| 483 | return NULL; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 484 | sp->so_server = server; |
| 485 | sp->so_cred = get_rpccred(cred); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 486 | spin_lock_init(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | INIT_LIST_HEAD(&sp->so_states); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 488 | nfs4_init_seqid_counter(&sp->so_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | atomic_set(&sp->so_count, 1); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 490 | INIT_LIST_HEAD(&sp->so_lru); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 491 | seqcount_init(&sp->so_reclaim_seqcount); |
Trond Myklebust | 65b62a2 | 2013-02-07 10:54:07 -0500 | [diff] [blame] | 492 | mutex_init(&sp->so_delegreturn_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | return sp; |
| 494 | } |
| 495 | |
Adrian Bunk | 1d2e88e | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 496 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
| 498 | { |
Trond Myklebust | c77365c | 2012-04-21 12:31:05 -0400 | [diff] [blame] | 499 | struct rb_node *rb_node = &sp->so_server_node; |
| 500 | |
| 501 | if (!RB_EMPTY_NODE(rb_node)) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 502 | struct nfs_server *server = sp->so_server; |
| 503 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 504 | |
| 505 | spin_lock(&clp->cl_lock); |
Trond Myklebust | c77365c | 2012-04-21 12:31:05 -0400 | [diff] [blame] | 506 | if (!RB_EMPTY_NODE(rb_node)) { |
| 507 | rb_erase(rb_node, &server->state_owners); |
| 508 | RB_CLEAR_NODE(rb_node); |
| 509 | } |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 510 | spin_unlock(&clp->cl_lock); |
| 511 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | } |
| 513 | |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 514 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
| 515 | { |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 516 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 517 | put_rpccred(sp->so_cred); |
| 518 | kfree(sp); |
| 519 | } |
| 520 | |
| 521 | static void nfs4_gc_state_owners(struct nfs_server *server) |
| 522 | { |
| 523 | struct nfs_client *clp = server->nfs_client; |
| 524 | struct nfs4_state_owner *sp, *tmp; |
| 525 | unsigned long time_min, time_max; |
| 526 | LIST_HEAD(doomed); |
| 527 | |
| 528 | spin_lock(&clp->cl_lock); |
| 529 | time_max = jiffies; |
| 530 | time_min = (long)time_max - (long)clp->cl_lease_time; |
| 531 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 532 | /* NB: LRU is sorted so that oldest is at the head */ |
| 533 | if (time_in_range(sp->so_expires, time_min, time_max)) |
| 534 | break; |
| 535 | list_move(&sp->so_lru, &doomed); |
| 536 | nfs4_remove_state_owner_locked(sp); |
| 537 | } |
| 538 | spin_unlock(&clp->cl_lock); |
| 539 | |
| 540 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 541 | list_del(&sp->so_lru); |
| 542 | nfs4_free_state_owner(sp); |
| 543 | } |
| 544 | } |
| 545 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 546 | /** |
| 547 | * nfs4_get_state_owner - Look up a state owner given a credential |
| 548 | * @server: nfs_server to search |
| 549 | * @cred: RPC credential to match |
| 550 | * |
| 551 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. |
| 552 | */ |
| 553 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 554 | struct rpc_cred *cred, |
| 555 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 557 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | struct nfs4_state_owner *sp, *new; |
| 559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 561 | sp = nfs4_find_state_owner_locked(server, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | if (sp != NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 564 | goto out; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 565 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 566 | if (new == NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 567 | goto out; |
Trond Myklebust | 9157c31 | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 568 | do { |
| 569 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) |
| 570 | break; |
| 571 | spin_lock(&clp->cl_lock); |
| 572 | sp = nfs4_insert_state_owner_locked(new); |
| 573 | spin_unlock(&clp->cl_lock); |
| 574 | } while (sp == ERR_PTR(-EAGAIN)); |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 575 | if (sp != new) |
| 576 | nfs4_free_state_owner(new); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 577 | out: |
| 578 | nfs4_gc_state_owners(server); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 579 | return sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | } |
| 581 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 582 | /** |
| 583 | * nfs4_put_state_owner - Release a nfs4_state_owner |
| 584 | * @sp: state owner data to release |
Trond Myklebust | 7bf97bc | 2012-04-21 12:36:19 -0400 | [diff] [blame] | 585 | * |
| 586 | * Note that we keep released state owners on an LRU |
| 587 | * list. |
| 588 | * This caches valid state owners so that they can be |
| 589 | * reused, to avoid the OPEN_CONFIRM on minor version 0. |
| 590 | * It also pins the uniquifier of dropped state owners for |
| 591 | * a while, to ensure that those state owner names are |
| 592 | * never reused. |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 593 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
| 595 | { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 596 | struct nfs_server *server = sp->so_server; |
| 597 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
| 599 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) |
| 600 | return; |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 601 | |
Trond Myklebust | 7bf97bc | 2012-04-21 12:36:19 -0400 | [diff] [blame] | 602 | sp->so_expires = jiffies; |
| 603 | list_add_tail(&sp->so_lru, &server->state_owners_lru); |
| 604 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 605 | } |
| 606 | |
| 607 | /** |
| 608 | * nfs4_purge_state_owners - Release all cached state owners |
| 609 | * @server: nfs_server with cached state owners to release |
| 610 | * |
| 611 | * Called at umount time. Remaining state owners will be on |
| 612 | * the LRU with ref count of zero. |
| 613 | */ |
| 614 | void nfs4_purge_state_owners(struct nfs_server *server) |
| 615 | { |
| 616 | struct nfs_client *clp = server->nfs_client; |
| 617 | struct nfs4_state_owner *sp, *tmp; |
| 618 | LIST_HEAD(doomed); |
| 619 | |
| 620 | spin_lock(&clp->cl_lock); |
| 621 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 622 | list_move(&sp->so_lru, &doomed); |
| 623 | nfs4_remove_state_owner_locked(sp); |
| 624 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 626 | |
| 627 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 628 | list_del(&sp->so_lru); |
| 629 | nfs4_free_state_owner(sp); |
| 630 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | static struct nfs4_state * |
| 634 | nfs4_alloc_open_state(void) |
| 635 | { |
| 636 | struct nfs4_state *state; |
| 637 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 638 | state = kzalloc(sizeof(*state), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | if (!state) |
| 640 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | atomic_set(&state->count, 1); |
| 642 | INIT_LIST_HEAD(&state->lock_states); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 643 | spin_lock_init(&state->state_lock); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 644 | seqlock_init(&state->seqlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | return state; |
| 646 | } |
| 647 | |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 648 | void |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 649 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 650 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 651 | if (state->state == fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 652 | return; |
| 653 | /* NB! List reordering - see the reclaim code for why. */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 654 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
| 655 | if (fmode & FMODE_WRITE) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 656 | list_move(&state->open_states, &state->owner->so_states); |
| 657 | else |
| 658 | list_move_tail(&state->open_states, &state->owner->so_states); |
| 659 | } |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 660 | state->state = fmode; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 661 | } |
| 662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | static struct nfs4_state * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) |
| 665 | { |
| 666 | struct nfs_inode *nfsi = NFS_I(inode); |
| 667 | struct nfs4_state *state; |
| 668 | |
| 669 | list_for_each_entry(state, &nfsi->open_states, inode_states) { |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 670 | if (state->owner != owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | continue; |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 672 | if (!nfs4_valid_open_stateid(state)) |
| 673 | continue; |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 674 | if (atomic_inc_not_zero(&state->count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | return state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | } |
| 677 | return NULL; |
| 678 | } |
| 679 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | static void |
| 681 | nfs4_free_open_state(struct nfs4_state *state) |
| 682 | { |
| 683 | kfree(state); |
| 684 | } |
| 685 | |
| 686 | struct nfs4_state * |
| 687 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) |
| 688 | { |
| 689 | struct nfs4_state *state, *new; |
| 690 | struct nfs_inode *nfsi = NFS_I(inode); |
| 691 | |
| 692 | spin_lock(&inode->i_lock); |
| 693 | state = __nfs4_find_state_byowner(inode, owner); |
| 694 | spin_unlock(&inode->i_lock); |
| 695 | if (state) |
| 696 | goto out; |
| 697 | new = nfs4_alloc_open_state(); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 698 | spin_lock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | spin_lock(&inode->i_lock); |
| 700 | state = __nfs4_find_state_byowner(inode, owner); |
| 701 | if (state == NULL && new != NULL) { |
| 702 | state = new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | state->owner = owner; |
| 704 | atomic_inc(&owner->so_count); |
| 705 | list_add(&state->inode_states, &nfsi->open_states); |
Dave Chinner | 0444d76 | 2011-03-29 18:08:50 +1100 | [diff] [blame] | 706 | ihold(inode); |
| 707 | state->inode = inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 709 | /* Note: The reclaim code dictates that we add stateless |
| 710 | * and read-only stateids to the end of the list */ |
| 711 | list_add_tail(&state->open_states, &owner->so_states); |
| 712 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | } else { |
| 714 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 715 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | if (new) |
| 717 | nfs4_free_open_state(new); |
| 718 | } |
| 719 | out: |
| 720 | return state; |
| 721 | } |
| 722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | void nfs4_put_open_state(struct nfs4_state *state) |
| 724 | { |
| 725 | struct inode *inode = state->inode; |
| 726 | struct nfs4_state_owner *owner = state->owner; |
| 727 | |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 728 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | return; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 730 | spin_lock(&inode->i_lock); |
Trond Myklebust | ba683031 | 2007-07-27 10:23:05 -0400 | [diff] [blame] | 731 | list_del(&state->inode_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | list_del(&state->open_states); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 733 | spin_unlock(&inode->i_lock); |
| 734 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | nfs4_free_open_state(state); |
| 737 | nfs4_put_state_owner(owner); |
| 738 | } |
| 739 | |
| 740 | /* |
Trond Myklebust | 83c9d41 | 2005-10-18 14:20:13 -0700 | [diff] [blame] | 741 | * Close the current file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | */ |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 743 | static void __nfs4_close(struct nfs4_state *state, |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 744 | fmode_t fmode, gfp_t gfp_mask, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | struct nfs4_state_owner *owner = state->owner; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 747 | int call_close = 0; |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 748 | fmode_t newstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | |
| 750 | atomic_inc(&owner->so_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | /* Protect against nfs4_find_state() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 752 | spin_lock(&owner->so_lock); |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 753 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 754 | case FMODE_READ: |
| 755 | state->n_rdonly--; |
| 756 | break; |
| 757 | case FMODE_WRITE: |
| 758 | state->n_wronly--; |
| 759 | break; |
| 760 | case FMODE_READ|FMODE_WRITE: |
| 761 | state->n_rdwr--; |
| 762 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 763 | newstate = FMODE_READ|FMODE_WRITE; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 764 | if (state->n_rdwr == 0) { |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 765 | if (state->n_rdonly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 766 | newstate &= ~FMODE_READ; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 767 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 768 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 769 | } |
| 770 | if (state->n_wronly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 771 | newstate &= ~FMODE_WRITE; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 772 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 773 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 774 | } |
| 775 | if (newstate == 0) |
| 776 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 777 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 778 | nfs4_state_set_mode_locked(state, newstate); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 779 | spin_unlock(&owner->so_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 780 | |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 781 | if (!call_close) { |
Trond Myklebust | b39e625 | 2007-06-11 23:05:07 -0400 | [diff] [blame] | 782 | nfs4_put_open_state(state); |
| 783 | nfs4_put_state_owner(owner); |
Trond Myklebust | 1f7977c | 2012-09-20 20:31:51 -0400 | [diff] [blame] | 784 | } else |
| 785 | nfs4_do_close(state, gfp_mask, wait); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 786 | } |
| 787 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 788 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 789 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 790 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 791 | } |
| 792 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 793 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 794 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 795 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | } |
| 797 | |
| 798 | /* |
| 799 | * Search the state->lock_states for an existing lock_owner |
| 800 | * that is compatible with current->files |
| 801 | */ |
| 802 | static struct nfs4_lock_state * |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 803 | __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] | 804 | { |
| 805 | struct nfs4_lock_state *pos; |
| 806 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 807 | if (pos->ls_owner != fl_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | continue; |
| 809 | atomic_inc(&pos->ls_count); |
| 810 | return pos; |
| 811 | } |
| 812 | return NULL; |
| 813 | } |
| 814 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | /* |
| 816 | * Return a compatible lock_state. If no initialized lock_state structure |
| 817 | * exists, return an uninitialized one. |
| 818 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | */ |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 820 | 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] | 821 | { |
| 822 | struct nfs4_lock_state *lsp; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 823 | struct nfs_server *server = state->owner->so_server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 825 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | if (lsp == NULL) |
| 827 | return NULL; |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 828 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | atomic_set(&lsp->ls_count, 1); |
Trond Myklebust | b64aec8 | 2009-07-21 16:47:46 -0400 | [diff] [blame] | 830 | lsp->ls_state = state; |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 831 | lsp->ls_owner = fl_owner; |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 832 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
| 833 | if (lsp->ls_seqid.owner_id < 0) |
Trond Myklebust | d2d7ce2 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 834 | goto out_free; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 835 | INIT_LIST_HEAD(&lsp->ls_locks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | return lsp; |
Trond Myklebust | d2d7ce2 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 837 | out_free: |
| 838 | kfree(lsp); |
| 839 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | } |
| 841 | |
Trond Myklebust | 5ae67c4 | 2012-03-19 16:17:18 -0400 | [diff] [blame] | 842 | 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] | 843 | { |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 844 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 845 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 846 | kfree(lsp); |
| 847 | } |
| 848 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | /* |
| 850 | * Return a compatible lock_state. If no initialized lock_state structure |
| 851 | * exists, return an uninitialized one. |
| 852 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | */ |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 854 | 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] | 855 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 856 | struct nfs4_lock_state *lsp, *new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 858 | for(;;) { |
| 859 | spin_lock(&state->state_lock); |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 860 | lsp = __nfs4_find_lock_state(state, owner); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 861 | if (lsp != NULL) |
| 862 | break; |
| 863 | if (new != NULL) { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 864 | list_add(&new->ls_locks, &state->lock_states); |
| 865 | set_bit(LK_STATE_IN_USE, &state->flags); |
| 866 | lsp = new; |
| 867 | new = NULL; |
| 868 | break; |
| 869 | } |
| 870 | spin_unlock(&state->state_lock); |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 871 | new = nfs4_alloc_lock_state(state, owner); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 872 | if (new == NULL) |
| 873 | return NULL; |
| 874 | } |
| 875 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 876 | if (new != NULL) |
Trond Myklebust | 5ae67c4 | 2012-03-19 16:17:18 -0400 | [diff] [blame] | 877 | nfs4_free_lock_state(state->owner->so_server, new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | return lsp; |
| 879 | } |
| 880 | |
| 881 | /* |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 882 | * Release reference to lock_state, and free it if we see that |
| 883 | * it is no longer in use |
| 884 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 885 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 886 | { |
Trond Myklebust | c8b2d0b | 2013-05-03 16:22:55 -0400 | [diff] [blame] | 887 | struct nfs_server *server; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 888 | struct nfs4_state *state; |
| 889 | |
| 890 | if (lsp == NULL) |
| 891 | return; |
| 892 | state = lsp->ls_state; |
| 893 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
| 894 | return; |
| 895 | list_del(&lsp->ls_locks); |
| 896 | if (list_empty(&state->lock_states)) |
| 897 | clear_bit(LK_STATE_IN_USE, &state->flags); |
| 898 | spin_unlock(&state->state_lock); |
Jeff Layton | 0c0e0d3 | 2014-09-08 08:26:01 -0400 | [diff] [blame] | 899 | server = state->owner->so_server; |
| 900 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
| 901 | struct nfs_client *clp = server->nfs_client; |
| 902 | |
| 903 | clp->cl_mvops->free_lock_state(server, lsp); |
| 904 | } else |
Trond Myklebust | c8b2d0b | 2013-05-03 16:22:55 -0400 | [diff] [blame] | 905 | nfs4_free_lock_state(server, lsp); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 906 | } |
| 907 | |
| 908 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
| 909 | { |
| 910 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
| 911 | |
| 912 | dst->fl_u.nfs4_fl.owner = lsp; |
| 913 | atomic_inc(&lsp->ls_count); |
| 914 | } |
| 915 | |
| 916 | static void nfs4_fl_release_lock(struct file_lock *fl) |
| 917 | { |
| 918 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
| 919 | } |
| 920 | |
Alexey Dobriyan | 6aed628 | 2009-09-21 17:01:11 -0700 | [diff] [blame] | 921 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 922 | .fl_copy_lock = nfs4_fl_copy_lock, |
| 923 | .fl_release_private = nfs4_fl_release_lock, |
| 924 | }; |
| 925 | |
| 926 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
| 927 | { |
| 928 | struct nfs4_lock_state *lsp; |
| 929 | |
| 930 | if (fl->fl_ops != NULL) |
| 931 | return 0; |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 932 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 933 | if (lsp == NULL) |
| 934 | return -ENOMEM; |
| 935 | fl->fl_u.nfs4_fl.owner = lsp; |
| 936 | fl->fl_ops = &nfs4_fl_lock_ops; |
| 937 | return 0; |
| 938 | } |
| 939 | |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 940 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
| 941 | struct nfs4_state *state, |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 942 | const struct nfs_lockowner *lockowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 944 | struct nfs4_lock_state *lsp; |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 945 | fl_owner_t fl_owner; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 946 | int ret = -ENOENT; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 947 | |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 948 | |
| 949 | if (lockowner == NULL) |
| 950 | goto out; |
| 951 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 952 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
| 953 | goto out; |
| 954 | |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 955 | fl_owner = lockowner->l_owner; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 956 | spin_lock(&state->state_lock); |
Jeff Layton | 8003d3c | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 957 | lsp = __nfs4_find_lock_state(state, fl_owner); |
NeilBrown | ef1820f | 2013-09-04 17:04:49 +1000 | [diff] [blame] | 958 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
| 959 | ret = -EIO; |
| 960 | 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] | 961 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 962 | ret = 0; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 963 | } |
| 964 | spin_unlock(&state->state_lock); |
| 965 | nfs4_put_lock_state(lsp); |
| 966 | out: |
| 967 | return ret; |
| 968 | } |
| 969 | |
Trond Myklebust | 927864c | 2014-03-04 13:12:03 -0500 | [diff] [blame] | 970 | 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] | 971 | { |
Trond Myklebust | 92b40e9 | 2013-04-20 01:25:45 -0400 | [diff] [blame] | 972 | const nfs4_stateid *src; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 973 | int seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 975 | do { |
Trond Myklebust | 92b40e9 | 2013-04-20 01:25:45 -0400 | [diff] [blame] | 976 | src = &zero_stateid; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 977 | seq = read_seqbegin(&state->seqlock); |
Trond Myklebust | 92b40e9 | 2013-04-20 01:25:45 -0400 | [diff] [blame] | 978 | if (test_bit(NFS_OPEN_STATE, &state->flags)) |
| 979 | src = &state->open_stateid; |
| 980 | nfs4_stateid_copy(dst, src); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 981 | } while (read_seqretry(&state->seqlock, seq)); |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 982 | } |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 983 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 984 | /* |
| 985 | * Byte-range lock aware utility to initialize the stateid of read/write |
| 986 | * requests. |
| 987 | */ |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 988 | int nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 989 | fmode_t fmode, const struct nfs_lockowner *lockowner) |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 990 | { |
NeilBrown | ef1820f | 2013-09-04 17:04:49 +1000 | [diff] [blame] | 991 | int ret = nfs4_copy_lock_stateid(dst, state, lockowner); |
| 992 | if (ret == -EIO) |
| 993 | /* A lost lock - don't even consider delegations */ |
| 994 | goto out; |
Andy Adamson | 146d70c | 2014-02-18 10:36:05 -0500 | [diff] [blame] | 995 | /* returns true if delegation stateid found and copied */ |
| 996 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) { |
| 997 | ret = 0; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 998 | goto out; |
Andy Adamson | 146d70c | 2014-02-18 10:36:05 -0500 | [diff] [blame] | 999 | } |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 1000 | if (ret != -ENOENT) |
NeilBrown | ef1820f | 2013-09-04 17:04:49 +1000 | [diff] [blame] | 1001 | /* nfs4_copy_delegation_stateid() didn't over-write |
| 1002 | * dst, so it still has the lock stateid which we now |
| 1003 | * choose to use. |
| 1004 | */ |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 1005 | goto out; |
Trond Myklebust | 927864c | 2014-03-04 13:12:03 -0500 | [diff] [blame] | 1006 | nfs4_copy_open_stateid(dst, state); |
| 1007 | ret = 0; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 1008 | out: |
Trond Myklebust | 3b66486 | 2013-03-17 15:31:15 -0400 | [diff] [blame] | 1009 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
| 1010 | dst->seqid = 0; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 1011 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | } |
| 1013 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1014 | 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] | 1015 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1016 | struct nfs_seqid *new; |
| 1017 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1018 | new = kmalloc(sizeof(*new), gfp_mask); |
Trond Myklebust | badc76d | 2015-01-23 18:48:00 -0500 | [diff] [blame] | 1019 | if (new == NULL) |
| 1020 | return ERR_PTR(-ENOMEM); |
| 1021 | new->sequence = counter; |
| 1022 | INIT_LIST_HEAD(&new->list); |
| 1023 | new->task = NULL; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1024 | return new; |
| 1025 | } |
| 1026 | |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 1027 | void nfs_release_seqid(struct nfs_seqid *seqid) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1028 | { |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1029 | struct nfs_seqid_counter *sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1030 | |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1031 | if (seqid == NULL || list_empty(&seqid->list)) |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1032 | return; |
| 1033 | sequence = seqid->sequence; |
| 1034 | spin_lock(&sequence->lock); |
| 1035 | list_del_init(&seqid->list); |
| 1036 | if (!list_empty(&sequence->list)) { |
| 1037 | struct nfs_seqid *next; |
| 1038 | |
| 1039 | next = list_first_entry(&sequence->list, |
| 1040 | struct nfs_seqid, list); |
| 1041 | rpc_wake_up_queued_task(&sequence->wait, next->task); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1042 | } |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1043 | spin_unlock(&sequence->lock); |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 1044 | } |
| 1045 | |
| 1046 | void nfs_free_seqid(struct nfs_seqid *seqid) |
| 1047 | { |
| 1048 | nfs_release_seqid(seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1049 | kfree(seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
| 1051 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1053 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
| 1054 | * failed with a seqid incrementing error - |
Toralf Förster | 16a6ddc | 2013-12-12 19:09:00 +0100 | [diff] [blame] | 1055 | * see comments nfs4.h:seqid_mutating_error() |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1056 | */ |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 1057 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1059 | switch (status) { |
| 1060 | case 0: |
| 1061 | break; |
| 1062 | case -NFS4ERR_BAD_SEQID: |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 1063 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
| 1064 | return; |
Trond Myklebust | 9a3ba43 | 2012-03-12 18:01:48 -0400 | [diff] [blame] | 1065 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
Dan Muntz | 497799e | 2008-02-13 13:09:35 -0800 | [diff] [blame] | 1066 | " sequence-id error on an" |
| 1067 | " unconfirmed sequence %p!\n", |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 1068 | seqid->sequence); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1069 | case -NFS4ERR_STALE_CLIENTID: |
| 1070 | case -NFS4ERR_STALE_STATEID: |
| 1071 | case -NFS4ERR_BAD_STATEID: |
| 1072 | case -NFS4ERR_BADXDR: |
| 1073 | case -NFS4ERR_RESOURCE: |
| 1074 | case -NFS4ERR_NOFILEHANDLE: |
| 1075 | /* Non-seqid mutating errors */ |
| 1076 | return; |
| 1077 | }; |
| 1078 | /* |
| 1079 | * Note: no locking needed as we are guaranteed to be first |
| 1080 | * on the sequence list |
| 1081 | */ |
| 1082 | seqid->sequence->counter++; |
| 1083 | } |
| 1084 | |
| 1085 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) |
| 1086 | { |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1087 | struct nfs4_state_owner *sp; |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1088 | |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1089 | if (seqid == NULL) |
| 1090 | return; |
| 1091 | |
| 1092 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1093 | if (status == -NFS4ERR_BAD_SEQID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | nfs4_drop_state_owner(sp); |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1095 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1096 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1097 | } |
| 1098 | |
| 1099 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1100 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
| 1101 | * failed with a seqid incrementing error - |
Toralf Förster | 16a6ddc | 2013-12-12 19:09:00 +0100 | [diff] [blame] | 1102 | * see comments nfs4.h:seqid_mutating_error() |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1103 | */ |
| 1104 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) |
| 1105 | { |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1106 | if (seqid != NULL) |
| 1107 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1108 | } |
| 1109 | |
| 1110 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) |
| 1111 | { |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1112 | struct nfs_seqid_counter *sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1113 | int status = 0; |
| 1114 | |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1115 | if (seqid == NULL) |
| 1116 | goto out; |
| 1117 | sequence = seqid->sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1118 | spin_lock(&sequence->lock); |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1119 | seqid->task = task; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1120 | if (list_empty(&seqid->list)) |
| 1121 | list_add_tail(&seqid->list, &sequence->list); |
| 1122 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) |
| 1123 | goto unlock; |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 1124 | rpc_sleep_on(&sequence->wait, task, NULL); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1125 | status = -EAGAIN; |
| 1126 | unlock: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1127 | spin_unlock(&sequence->lock); |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1128 | out: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1129 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | } |
| 1131 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1132 | static int nfs4_run_state_manager(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1134 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1135 | { |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1136 | smp_mb__before_atomic(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1137 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1138 | smp_mb__after_atomic(); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1139 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1140 | rpc_wake_up(&clp->cl_rpcwaitq); |
| 1141 | } |
| 1142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | /* |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1144 | * Schedule the nfs_client asynchronous state management routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | */ |
Trond Myklebust | b0d3ded | 2008-12-23 15:21:50 -0500 | [diff] [blame] | 1146 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | { |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1148 | struct task_struct *task; |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1149 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1151 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1152 | return; |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1153 | __module_get(THIS_MODULE); |
| 1154 | atomic_inc(&clp->cl_count); |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1155 | |
| 1156 | /* The rcu_read_lock() is not strictly necessary, as the state |
| 1157 | * manager is the only thread that ever changes the rpc_xprt |
| 1158 | * after it's initialized. At this point, we're single threaded. */ |
| 1159 | rcu_read_lock(); |
| 1160 | snprintf(buf, sizeof(buf), "%s-manager", |
| 1161 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
| 1162 | rcu_read_unlock(); |
Kees Cook | f170168 | 2013-07-03 15:04:58 -0700 | [diff] [blame] | 1163 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1164 | if (IS_ERR(task)) { |
| 1165 | printk(KERN_ERR "%s: kthread_run: %ld\n", |
| 1166 | __func__, PTR_ERR(task)); |
| 1167 | nfs4_clear_state_manager_bit(clp); |
| 1168 | nfs_put_client(clp); |
| 1169 | module_put(THIS_MODULE); |
| 1170 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | } |
| 1172 | |
| 1173 | /* |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1174 | * Schedule a lease recovery attempt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | */ |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1176 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | { |
| 1178 | if (!clp) |
| 1179 | return; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1180 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1181 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1182 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
| 1183 | clp->cl_hostname); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1184 | nfs4_schedule_state_manager(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | } |
Andy Adamson | 9cb8196 | 2012-03-07 10:49:41 -0500 | [diff] [blame] | 1186 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 1188 | /** |
| 1189 | * nfs4_schedule_migration_recovery - trigger migration recovery |
| 1190 | * |
| 1191 | * @server: FSID that is migrating |
| 1192 | * |
| 1193 | * Returns zero if recovery has started, otherwise a negative NFS4ERR |
| 1194 | * value is returned. |
| 1195 | */ |
| 1196 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) |
| 1197 | { |
| 1198 | struct nfs_client *clp = server->nfs_client; |
| 1199 | |
| 1200 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { |
| 1201 | pr_err("NFS: volatile file handles not supported (server %s)\n", |
| 1202 | clp->cl_hostname); |
| 1203 | return -NFS4ERR_IO; |
| 1204 | } |
| 1205 | |
| 1206 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) |
| 1207 | return -NFS4ERR_IO; |
| 1208 | |
| 1209 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", |
| 1210 | __func__, |
| 1211 | (unsigned long long)server->fsid.major, |
| 1212 | (unsigned long long)server->fsid.minor, |
| 1213 | clp->cl_hostname); |
| 1214 | |
| 1215 | set_bit(NFS_MIG_IN_TRANSITION, |
| 1216 | &((struct nfs_server *)server)->mig_status); |
| 1217 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); |
| 1218 | |
| 1219 | nfs4_schedule_state_manager(clp); |
| 1220 | return 0; |
| 1221 | } |
| 1222 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); |
| 1223 | |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 1224 | /** |
| 1225 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery |
| 1226 | * |
| 1227 | * @clp: server to check for moved leases |
| 1228 | * |
| 1229 | */ |
| 1230 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) |
| 1231 | { |
| 1232 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", |
| 1233 | __func__, clp->cl_clientid, clp->cl_hostname); |
| 1234 | |
| 1235 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); |
| 1236 | nfs4_schedule_state_manager(clp); |
| 1237 | } |
| 1238 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); |
| 1239 | |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1240 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
| 1241 | { |
| 1242 | int res; |
| 1243 | |
| 1244 | might_sleep(); |
| 1245 | |
Chuck Lever | 0625c2d | 2013-10-17 14:14:10 -0400 | [diff] [blame] | 1246 | atomic_inc(&clp->cl_count); |
NeilBrown | 7431620 | 2014-07-07 15:16:04 +1000 | [diff] [blame] | 1247 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
| 1248 | nfs_wait_bit_killable, TASK_KILLABLE); |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1249 | if (res) |
Chuck Lever | 0625c2d | 2013-10-17 14:14:10 -0400 | [diff] [blame] | 1250 | goto out; |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1251 | if (clp->cl_cons_state < 0) |
Chuck Lever | 0625c2d | 2013-10-17 14:14:10 -0400 | [diff] [blame] | 1252 | res = clp->cl_cons_state; |
| 1253 | out: |
| 1254 | nfs_put_client(clp); |
| 1255 | return res; |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1256 | } |
| 1257 | |
| 1258 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) |
| 1259 | { |
| 1260 | unsigned int loop; |
| 1261 | int ret; |
| 1262 | |
| 1263 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
| 1264 | ret = nfs4_wait_clnt_recover(clp); |
| 1265 | if (ret != 0) |
| 1266 | break; |
| 1267 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
| 1268 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) |
| 1269 | break; |
| 1270 | nfs4_schedule_state_manager(clp); |
| 1271 | ret = -EIO; |
| 1272 | } |
| 1273 | return ret; |
| 1274 | } |
| 1275 | |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1276 | /* |
| 1277 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN |
| 1278 | * @clp: client to process |
| 1279 | * |
| 1280 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a |
| 1281 | * resend of the SETCLIENTID and hence re-establish the |
| 1282 | * callback channel. Then return all existing delegations. |
| 1283 | */ |
| 1284 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) |
| 1285 | { |
| 1286 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1287 | nfs_expire_all_delegations(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1288 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
| 1289 | clp->cl_hostname); |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1290 | } |
| 1291 | |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1292 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
| 1293 | { |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1294 | nfs40_handle_cb_pathdown(clp); |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1295 | nfs4_schedule_state_manager(clp); |
| 1296 | } |
| 1297 | |
Trond Myklebust | f9feab1 | 2011-03-09 16:12:46 -0500 | [diff] [blame] | 1298 | 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] | 1299 | { |
| 1300 | |
| 1301 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1302 | /* Don't recover state that expired before the reboot */ |
| 1303 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { |
| 1304 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1305 | return 0; |
| 1306 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1307 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1308 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 1309 | return 1; |
| 1310 | } |
| 1311 | |
Trond Myklebust | 4f14c19 | 2014-02-12 19:15:06 -0500 | [diff] [blame] | 1312 | 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] | 1313 | { |
| 1314 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 1315 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1316 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1317 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
| 1318 | return 1; |
| 1319 | } |
| 1320 | |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1321 | 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] | 1322 | { |
| 1323 | struct nfs_client *clp = server->nfs_client; |
| 1324 | |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1325 | if (!nfs4_valid_open_stateid(state)) |
| 1326 | return -EBADF; |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1327 | nfs4_state_mark_reclaim_nograce(clp, state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1328 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
| 1329 | clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1330 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1331 | return 0; |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1332 | } |
Andy Adamson | 9cb8196 | 2012-03-07 10:49:41 -0500 | [diff] [blame] | 1333 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1334 | |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1335 | void nfs_inode_find_state_and_recover(struct inode *inode, |
| 1336 | const nfs4_stateid *stateid) |
| 1337 | { |
| 1338 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; |
| 1339 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1340 | struct nfs_open_context *ctx; |
| 1341 | struct nfs4_state *state; |
| 1342 | bool found = false; |
| 1343 | |
| 1344 | spin_lock(&inode->i_lock); |
| 1345 | list_for_each_entry(ctx, &nfsi->open_files, list) { |
| 1346 | state = ctx->state; |
| 1347 | if (state == NULL) |
| 1348 | continue; |
| 1349 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
| 1350 | continue; |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 1351 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1352 | continue; |
| 1353 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1354 | found = true; |
| 1355 | } |
| 1356 | spin_unlock(&inode->i_lock); |
| 1357 | if (found) |
| 1358 | nfs4_schedule_state_manager(clp); |
| 1359 | } |
| 1360 | |
Trond Myklebust | c58c844 | 2013-03-18 19:45:14 -0400 | [diff] [blame] | 1361 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) |
| 1362 | { |
| 1363 | struct inode *inode = state->inode; |
| 1364 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1365 | struct nfs_open_context *ctx; |
| 1366 | |
| 1367 | spin_lock(&inode->i_lock); |
| 1368 | list_for_each_entry(ctx, &nfsi->open_files, list) { |
| 1369 | if (ctx->state != state) |
| 1370 | continue; |
| 1371 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); |
| 1372 | } |
| 1373 | spin_unlock(&inode->i_lock); |
| 1374 | } |
| 1375 | |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1376 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
| 1377 | { |
| 1378 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); |
Trond Myklebust | c58c844 | 2013-03-18 19:45:14 -0400 | [diff] [blame] | 1379 | nfs4_state_mark_open_context_bad(state); |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1380 | } |
| 1381 | |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1382 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1383 | 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] | 1384 | { |
| 1385 | struct inode *inode = state->inode; |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1386 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | struct file_lock *fl; |
| 1388 | int status = 0; |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1389 | struct file_lock_context *flctx = inode->i_flctx; |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1390 | struct list_head *list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1392 | if (flctx == NULL) |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1393 | return 0; |
| 1394 | |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1395 | list = &flctx->flc_posix; |
| 1396 | |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1397 | /* Guard against delegation returns and new lock/unlock calls */ |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1398 | down_write(&nfsi->rwsem); |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1399 | spin_lock(&flctx->flc_lock); |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1400 | restart: |
| 1401 | list_for_each_entry(fl, list, fl_list) { |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1402 | if (nfs_file_open_context(fl->fl_file)->state != state) |
| 1403 | continue; |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1404 | spin_unlock(&flctx->flc_lock); |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1405 | status = ops->recover_lock(state, fl); |
| 1406 | switch (status) { |
| 1407 | case 0: |
| 1408 | break; |
| 1409 | case -ESTALE: |
| 1410 | case -NFS4ERR_ADMIN_REVOKED: |
| 1411 | case -NFS4ERR_STALE_STATEID: |
| 1412 | case -NFS4ERR_BAD_STATEID: |
| 1413 | case -NFS4ERR_EXPIRED: |
| 1414 | case -NFS4ERR_NO_GRACE: |
| 1415 | case -NFS4ERR_STALE_CLIENTID: |
| 1416 | case -NFS4ERR_BADSESSION: |
| 1417 | case -NFS4ERR_BADSLOT: |
| 1418 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1419 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1420 | goto out; |
| 1421 | default: |
| 1422 | pr_err("NFS: %s: unhandled error %d\n", |
| 1423 | __func__, status); |
| 1424 | case -ENOMEM: |
| 1425 | case -NFS4ERR_DENIED: |
| 1426 | case -NFS4ERR_RECLAIM_BAD: |
| 1427 | case -NFS4ERR_RECLAIM_CONFLICT: |
| 1428 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
| 1429 | status = 0; |
| 1430 | } |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1431 | spin_lock(&flctx->flc_lock); |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1432 | } |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1433 | if (list == &flctx->flc_posix) { |
| 1434 | list = &flctx->flc_flock; |
| 1435 | goto restart; |
| 1436 | } |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1437 | spin_unlock(&flctx->flc_lock); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1438 | out: |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1439 | up_write(&nfsi->rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | return status; |
| 1441 | } |
| 1442 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1443 | 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] | 1444 | { |
| 1445 | struct nfs4_state *state; |
| 1446 | struct nfs4_lock_state *lock; |
| 1447 | int status = 0; |
| 1448 | |
| 1449 | /* Note: we rely on the sp->so_states list being ordered |
| 1450 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) |
| 1451 | * states first. |
| 1452 | * This is needed to ensure that the server won't give us any |
| 1453 | * read delegations that we have to return if, say, we are |
| 1454 | * recovering after a network partition or a reboot from a |
| 1455 | * server that doesn't support a grace period. |
| 1456 | */ |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1457 | spin_lock(&sp->so_lock); |
Trond Myklebust | abbec2da | 2014-06-05 10:42:37 -0400 | [diff] [blame] | 1458 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1459 | restart: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1461 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
| 1462 | continue; |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1463 | if (!nfs4_valid_open_stateid(state)) |
| 1464 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | if (state->state == 0) |
| 1466 | continue; |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1467 | atomic_inc(&state->count); |
| 1468 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | status = ops->recover_open(sp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | if (status >= 0) { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1471 | status = nfs4_reclaim_locks(state, ops); |
| 1472 | if (status >= 0) { |
Jeff Layton | 1acd1c3 | 2013-10-31 13:03:04 -0400 | [diff] [blame] | 1473 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
NeilBrown | 6686390 | 2013-08-12 16:52:47 +1000 | [diff] [blame] | 1474 | spin_lock(&state->state_lock); |
| 1475 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
| 1476 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
| 1477 | pr_warn_ratelimited("NFS: " |
| 1478 | "%s: Lock reclaim " |
| 1479 | "failed!\n", __func__); |
| 1480 | } |
| 1481 | spin_unlock(&state->state_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1482 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1483 | nfs4_put_open_state(state); |
Olga Kornievskaia | e8d975e | 2015-05-15 11:45:31 -0400 | [diff] [blame] | 1484 | clear_bit(NFS4CLNT_RECLAIM_NOGRACE, |
| 1485 | &state->flags); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1486 | spin_lock(&sp->so_lock); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1487 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | } |
| 1490 | switch (status) { |
| 1491 | default: |
Andy Adamson | 3660cd4 | 2013-10-03 12:23:24 -0400 | [diff] [blame] | 1492 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", |
| 1493 | __func__, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | case -ENOENT: |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1495 | case -ENOMEM: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1496 | case -ESTALE: |
Andy Adamson | 3660cd4 | 2013-10-03 12:23:24 -0400 | [diff] [blame] | 1497 | /* Open state on this file cannot be recovered */ |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1498 | nfs4_state_mark_recovery_failed(state, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | break; |
Trond Myklebust | 91876b1 | 2013-03-28 14:01:33 -0400 | [diff] [blame] | 1500 | case -EAGAIN: |
| 1501 | ssleep(1); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1502 | case -NFS4ERR_ADMIN_REVOKED: |
| 1503 | case -NFS4ERR_STALE_STATEID: |
| 1504 | case -NFS4ERR_BAD_STATEID: |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1505 | case -NFS4ERR_RECLAIM_BAD: |
| 1506 | case -NFS4ERR_RECLAIM_CONFLICT: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1507 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1508 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | case -NFS4ERR_EXPIRED: |
| 1510 | case -NFS4ERR_NO_GRACE: |
Trond Myklebust | 1f0e890 | 2010-06-24 15:11:43 -0400 | [diff] [blame] | 1511 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | 9c4c761 | 2009-12-03 15:58:56 -0500 | [diff] [blame] | 1513 | case -NFS4ERR_BADSESSION: |
| 1514 | case -NFS4ERR_BADSLOT: |
| 1515 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1516 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | goto out_err; |
| 1518 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1519 | nfs4_put_open_state(state); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1520 | spin_lock(&sp->so_lock); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1521 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | } |
Trond Myklebust | abbec2da | 2014-06-05 10:42:37 -0400 | [diff] [blame] | 1523 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1524 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | return 0; |
| 1526 | out_err: |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1527 | nfs4_put_open_state(state); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1528 | spin_lock(&sp->so_lock); |
Trond Myklebust | abbec2da | 2014-06-05 10:42:37 -0400 | [diff] [blame] | 1529 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1530 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | return status; |
| 1532 | } |
| 1533 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1534 | static void nfs4_clear_open_state(struct nfs4_state *state) |
| 1535 | { |
| 1536 | struct nfs4_lock_state *lock; |
| 1537 | |
| 1538 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1539 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1540 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1541 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1542 | spin_lock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1543 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1544 | lock->ls_seqid.flags = 0; |
Trond Myklebust | 795a88c | 2012-09-10 13:26:49 -0400 | [diff] [blame] | 1545 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1546 | } |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1547 | spin_unlock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1548 | } |
| 1549 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1550 | static void nfs4_reset_seqids(struct nfs_server *server, |
| 1551 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1552 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1553 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1554 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1555 | struct rb_node *pos; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1556 | struct nfs4_state *state; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1557 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1558 | spin_lock(&clp->cl_lock); |
| 1559 | for (pos = rb_first(&server->state_owners); |
| 1560 | pos != NULL; |
| 1561 | pos = rb_next(pos)) { |
| 1562 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1563 | sp->so_seqid.flags = 0; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1564 | spin_lock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1565 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1566 | if (mark_reclaim(clp, state)) |
| 1567 | nfs4_clear_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1568 | } |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1569 | spin_unlock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1570 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1571 | spin_unlock(&clp->cl_lock); |
| 1572 | } |
| 1573 | |
| 1574 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, |
| 1575 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
| 1576 | { |
| 1577 | struct nfs_server *server; |
| 1578 | |
| 1579 | rcu_read_lock(); |
| 1580 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1581 | nfs4_reset_seqids(server, mark_reclaim); |
| 1582 | rcu_read_unlock(); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1583 | } |
| 1584 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1585 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
| 1586 | { |
| 1587 | /* Mark all delegations for reclaim */ |
| 1588 | nfs_delegation_mark_reclaim(clp); |
| 1589 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); |
| 1590 | } |
| 1591 | |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1592 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1593 | const struct nfs4_state_recovery_ops *ops, |
| 1594 | struct rpc_cred *cred) |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1595 | { |
| 1596 | /* Notify the server we're done reclaiming our state */ |
| 1597 | if (ops->reclaim_complete) |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1598 | (void)ops->reclaim_complete(clp, cred); |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1599 | } |
| 1600 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1601 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1602 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1603 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1604 | struct nfs4_state_owner *sp; |
| 1605 | struct rb_node *pos; |
| 1606 | struct nfs4_state *state; |
| 1607 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1608 | spin_lock(&clp->cl_lock); |
| 1609 | for (pos = rb_first(&server->state_owners); |
| 1610 | pos != NULL; |
| 1611 | pos = rb_next(pos)) { |
| 1612 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1613 | spin_lock(&sp->so_lock); |
| 1614 | list_for_each_entry(state, &sp->so_states, open_states) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1615 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
| 1616 | &state->flags)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1617 | continue; |
| 1618 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1619 | } |
| 1620 | spin_unlock(&sp->so_lock); |
| 1621 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1622 | spin_unlock(&clp->cl_lock); |
| 1623 | } |
| 1624 | |
| 1625 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
| 1626 | { |
| 1627 | struct nfs_server *server; |
| 1628 | |
| 1629 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1630 | return 0; |
| 1631 | |
| 1632 | rcu_read_lock(); |
| 1633 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1634 | nfs4_clear_reclaim_server(server); |
| 1635 | rcu_read_unlock(); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1636 | |
| 1637 | nfs_delegation_reap_unclaimed(clp); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1638 | return 1; |
| 1639 | } |
| 1640 | |
| 1641 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
| 1642 | { |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1643 | const struct nfs4_state_recovery_ops *ops; |
| 1644 | struct rpc_cred *cred; |
| 1645 | |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1646 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
| 1647 | return; |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1648 | ops = clp->cl_mvops->reboot_recovery_ops; |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 1649 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1650 | nfs4_reclaim_complete(clp, ops, cred); |
| 1651 | put_rpccred(cred); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1652 | } |
| 1653 | |
| 1654 | static void nfs_delegation_clear_all(struct nfs_client *clp) |
| 1655 | { |
| 1656 | nfs_delegation_mark_reclaim(clp); |
| 1657 | nfs_delegation_reap_unclaimed(clp); |
| 1658 | } |
| 1659 | |
| 1660 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
| 1661 | { |
| 1662 | nfs_delegation_clear_all(clp); |
| 1663 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 1664 | } |
| 1665 | |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1666 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1667 | { |
| 1668 | switch (error) { |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1669 | case 0: |
| 1670 | break; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1671 | case -NFS4ERR_CB_PATH_DOWN: |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1672 | nfs40_handle_cb_pathdown(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1673 | break; |
Trond Myklebust | c8b7ae3d | 2009-12-03 15:53:21 -0500 | [diff] [blame] | 1674 | case -NFS4ERR_NO_GRACE: |
| 1675 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1676 | break; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1677 | case -NFS4ERR_STALE_CLIENTID: |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1678 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1679 | nfs4_state_clear_reclaim_reboot(clp); |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1680 | nfs4_state_start_reclaim_reboot(clp); |
| 1681 | break; |
| 1682 | case -NFS4ERR_EXPIRED: |
| 1683 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1684 | nfs4_state_start_reclaim_nograce(clp); |
Andy Adamson | 8ba9bf8 | 2009-12-04 15:55:34 -0500 | [diff] [blame] | 1685 | break; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1686 | case -NFS4ERR_BADSESSION: |
| 1687 | case -NFS4ERR_BADSLOT: |
| 1688 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1689 | case -NFS4ERR_DEADSESSION: |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 1690 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 1691 | case -NFS4ERR_SEQ_MISORDERED: |
Andy Adamson | 6df0818 | 2009-12-04 15:55:05 -0500 | [diff] [blame] | 1692 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
Andy Adamson | 0b9e2d4 | 2009-12-04 16:02:14 -0500 | [diff] [blame] | 1693 | /* Zero session reset errors */ |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1694 | break; |
Trond Myklebust | 7c5d725 | 2012-05-27 12:58:48 -0400 | [diff] [blame] | 1695 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1696 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 1697 | break; |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1698 | default: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1699 | dprintk("%s: failed to handle error %d for server %s\n", |
| 1700 | __func__, error, clp->cl_hostname); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1701 | return error; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1702 | } |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1703 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
| 1704 | clp->cl_hostname); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1705 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1706 | } |
| 1707 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1708 | 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] | 1709 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1710 | struct nfs4_state_owner *sp; |
| 1711 | struct nfs_server *server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1712 | struct rb_node *pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | int status = 0; |
| 1714 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1715 | restart: |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1716 | rcu_read_lock(); |
| 1717 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 1718 | nfs4_purge_state_owners(server); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1719 | spin_lock(&clp->cl_lock); |
| 1720 | for (pos = rb_first(&server->state_owners); |
| 1721 | pos != NULL; |
| 1722 | pos = rb_next(pos)) { |
| 1723 | sp = rb_entry(pos, |
| 1724 | struct nfs4_state_owner, so_server_node); |
| 1725 | if (!test_and_clear_bit(ops->owner_flag_bit, |
| 1726 | &sp->so_flags)) |
| 1727 | continue; |
| 1728 | atomic_inc(&sp->so_count); |
| 1729 | spin_unlock(&clp->cl_lock); |
| 1730 | rcu_read_unlock(); |
| 1731 | |
| 1732 | status = nfs4_reclaim_open_state(sp, ops); |
| 1733 | if (status < 0) { |
| 1734 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
| 1735 | nfs4_put_state_owner(sp); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 1736 | status = nfs4_recovery_handle_error(clp, status); |
| 1737 | return (status != 0) ? status : -EAGAIN; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1738 | } |
| 1739 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1740 | nfs4_put_state_owner(sp); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1741 | goto restart; |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1742 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1743 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1744 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1745 | rcu_read_unlock(); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 1746 | return 0; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1747 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1749 | static int nfs4_check_lease(struct nfs_client *clp) |
| 1750 | { |
| 1751 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1752 | const struct nfs4_state_maintenance_ops *ops = |
| 1753 | clp->cl_mvops->state_renewal_ops; |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1754 | int status; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1755 | |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1756 | /* Is the client already known to have an expired lease? */ |
| 1757 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1758 | return 0; |
Andy Adamson | a7b7210 | 2009-04-01 09:22:46 -0400 | [diff] [blame] | 1759 | spin_lock(&clp->cl_lock); |
| 1760 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1761 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1762 | if (cred == NULL) { |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 1763 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1764 | status = -ENOKEY; |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1765 | if (cred == NULL) |
| 1766 | goto out; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1767 | } |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1768 | status = ops->renew_lease(clp, cred); |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1769 | put_rpccred(cred); |
Trond Myklebust | bc7a05c | 2013-04-08 17:50:28 -0400 | [diff] [blame] | 1770 | if (status == -ETIMEDOUT) { |
| 1771 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 1772 | return 0; |
| 1773 | } |
Trond Myklebust | 0f605b5 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1774 | out: |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1775 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1776 | } |
| 1777 | |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1778 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
| 1779 | * and for recoverable errors on EXCHANGE_ID for v4.1 |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1780 | */ |
| 1781 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) |
| 1782 | { |
| 1783 | switch (status) { |
Trond Myklebust | 89a2173 | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1784 | case -NFS4ERR_SEQ_MISORDERED: |
| 1785 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) |
| 1786 | return -ESERVERFAULT; |
| 1787 | /* Lease confirmation error: retry after purging the lease */ |
| 1788 | ssleep(1); |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1789 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 1790 | break; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1791 | case -NFS4ERR_STALE_CLIENTID: |
| 1792 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1793 | nfs4_state_start_reclaim_reboot(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1794 | break; |
Chuck Lever | de73483 | 2012-07-11 16:30:50 -0400 | [diff] [blame] | 1795 | case -NFS4ERR_CLID_INUSE: |
| 1796 | pr_err("NFS: Server %s reports our clientid is in use\n", |
| 1797 | clp->cl_hostname); |
| 1798 | nfs_mark_client_ready(clp, -EPERM); |
| 1799 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 1800 | return -EPERM; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1801 | case -EACCES: |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1802 | case -NFS4ERR_DELAY: |
| 1803 | case -ETIMEDOUT: |
| 1804 | case -EAGAIN: |
| 1805 | ssleep(1); |
| 1806 | break; |
| 1807 | |
| 1808 | case -NFS4ERR_MINOR_VERS_MISMATCH: |
| 1809 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) |
| 1810 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1811 | dprintk("%s: exit with error %d for server %s\n", |
| 1812 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1813 | return -EPROTONOSUPPORT; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1814 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 1815 | * in nfs4_exchange_id */ |
| 1816 | default: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1817 | dprintk("%s: exit with error %d for server %s\n", __func__, |
| 1818 | status, clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1819 | return status; |
| 1820 | } |
| 1821 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1822 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
| 1823 | clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1824 | return 0; |
| 1825 | } |
| 1826 | |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1827 | static int nfs4_establish_lease(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1828 | { |
| 1829 | struct rpc_cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1830 | const struct nfs4_state_recovery_ops *ops = |
| 1831 | clp->cl_mvops->reboot_recovery_ops; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1832 | int status; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1833 | |
Trond Myklebust | 5cae02f | 2015-06-01 10:30:11 -0400 | [diff] [blame] | 1834 | nfs4_begin_drain_session(clp); |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 1835 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1836 | if (cred == NULL) |
| 1837 | return -ENOENT; |
| 1838 | status = ops->establish_clid(clp, cred); |
| 1839 | put_rpccred(cred); |
| 1840 | if (status != 0) |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1841 | return status; |
| 1842 | pnfs_destroy_all_layouts(clp); |
| 1843 | return 0; |
| 1844 | } |
| 1845 | |
Chuck Lever | 6bbb4ae | 2012-07-11 16:30:59 -0400 | [diff] [blame] | 1846 | /* |
| 1847 | * Returns zero or a negative errno. NFS4ERR values are converted |
| 1848 | * to local errno values. |
| 1849 | */ |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1850 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
| 1851 | { |
| 1852 | int status; |
| 1853 | |
| 1854 | status = nfs4_establish_lease(clp); |
| 1855 | if (status < 0) |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1856 | return nfs4_handle_reclaim_lease_error(clp, status); |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 1857 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) |
| 1858 | nfs4_state_start_reclaim_nograce(clp); |
| 1859 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 1860 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 1861 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 1862 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1863 | return 0; |
| 1864 | } |
| 1865 | |
| 1866 | static int nfs4_purge_lease(struct nfs_client *clp) |
| 1867 | { |
| 1868 | int status; |
| 1869 | |
| 1870 | status = nfs4_establish_lease(clp); |
| 1871 | if (status < 0) |
| 1872 | return nfs4_handle_reclaim_lease_error(clp, status); |
| 1873 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
| 1874 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1875 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1876 | return 0; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1877 | } |
| 1878 | |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 1879 | /* |
| 1880 | * Try remote migration of one FSID from a source server to a |
| 1881 | * destination server. The source server provides a list of |
| 1882 | * potential destinations. |
| 1883 | * |
| 1884 | * Returns zero or a negative NFS4ERR status code. |
| 1885 | */ |
| 1886 | static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) |
| 1887 | { |
| 1888 | struct nfs_client *clp = server->nfs_client; |
| 1889 | struct nfs4_fs_locations *locations = NULL; |
| 1890 | struct inode *inode; |
| 1891 | struct page *page; |
| 1892 | int status, result; |
| 1893 | |
| 1894 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, |
| 1895 | (unsigned long long)server->fsid.major, |
| 1896 | (unsigned long long)server->fsid.minor, |
| 1897 | clp->cl_hostname); |
| 1898 | |
| 1899 | result = 0; |
| 1900 | page = alloc_page(GFP_KERNEL); |
| 1901 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); |
| 1902 | if (page == NULL || locations == NULL) { |
| 1903 | dprintk("<-- %s: no memory\n", __func__); |
| 1904 | goto out; |
| 1905 | } |
| 1906 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1907 | inode = d_inode(server->super->s_root); |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 1908 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
| 1909 | if (result) { |
| 1910 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", |
| 1911 | __func__, result); |
| 1912 | goto out; |
| 1913 | } |
| 1914 | |
| 1915 | result = -NFS4ERR_NXIO; |
| 1916 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { |
| 1917 | dprintk("<-- %s: No fs_locations data, migration skipped\n", |
| 1918 | __func__); |
| 1919 | goto out; |
| 1920 | } |
| 1921 | |
| 1922 | nfs4_begin_drain_session(clp); |
| 1923 | |
| 1924 | status = nfs4_replace_transport(server, locations); |
| 1925 | if (status != 0) { |
| 1926 | dprintk("<-- %s: failed to replace transport: %d\n", |
| 1927 | __func__, status); |
| 1928 | goto out; |
| 1929 | } |
| 1930 | |
| 1931 | result = 0; |
| 1932 | dprintk("<-- %s: migration succeeded\n", __func__); |
| 1933 | |
| 1934 | out: |
| 1935 | if (page != NULL) |
| 1936 | __free_page(page); |
| 1937 | kfree(locations); |
| 1938 | if (result) { |
| 1939 | pr_err("NFS: migration recovery failed (server %s)\n", |
| 1940 | clp->cl_hostname); |
| 1941 | set_bit(NFS_MIG_FAILED, &server->mig_status); |
| 1942 | } |
| 1943 | return result; |
| 1944 | } |
| 1945 | |
| 1946 | /* |
| 1947 | * Returns zero or a negative NFS4ERR status code. |
| 1948 | */ |
| 1949 | static int nfs4_handle_migration(struct nfs_client *clp) |
| 1950 | { |
| 1951 | const struct nfs4_state_maintenance_ops *ops = |
| 1952 | clp->cl_mvops->state_renewal_ops; |
| 1953 | struct nfs_server *server; |
| 1954 | struct rpc_cred *cred; |
| 1955 | |
| 1956 | dprintk("%s: migration reported on \"%s\"\n", __func__, |
| 1957 | clp->cl_hostname); |
| 1958 | |
| 1959 | spin_lock(&clp->cl_lock); |
| 1960 | cred = ops->get_state_renewal_cred_locked(clp); |
| 1961 | spin_unlock(&clp->cl_lock); |
| 1962 | if (cred == NULL) |
| 1963 | return -NFS4ERR_NOENT; |
| 1964 | |
| 1965 | clp->cl_mig_gen++; |
| 1966 | restart: |
| 1967 | rcu_read_lock(); |
| 1968 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 1969 | int status; |
| 1970 | |
| 1971 | if (server->mig_gen == clp->cl_mig_gen) |
| 1972 | continue; |
| 1973 | server->mig_gen = clp->cl_mig_gen; |
| 1974 | |
| 1975 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, |
| 1976 | &server->mig_status)) |
| 1977 | continue; |
| 1978 | |
| 1979 | rcu_read_unlock(); |
| 1980 | status = nfs4_try_migration(server, cred); |
| 1981 | if (status < 0) { |
| 1982 | put_rpccred(cred); |
| 1983 | return status; |
| 1984 | } |
| 1985 | goto restart; |
| 1986 | } |
| 1987 | rcu_read_unlock(); |
| 1988 | put_rpccred(cred); |
| 1989 | return 0; |
| 1990 | } |
| 1991 | |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 1992 | /* |
| 1993 | * Test each nfs_server on the clp's cl_superblocks list to see |
| 1994 | * if it's moved to another server. Stop when the server no longer |
| 1995 | * returns NFS4ERR_LEASE_MOVED. |
| 1996 | */ |
| 1997 | static int nfs4_handle_lease_moved(struct nfs_client *clp) |
| 1998 | { |
| 1999 | const struct nfs4_state_maintenance_ops *ops = |
| 2000 | clp->cl_mvops->state_renewal_ops; |
| 2001 | struct nfs_server *server; |
| 2002 | struct rpc_cred *cred; |
| 2003 | |
| 2004 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, |
| 2005 | clp->cl_hostname); |
| 2006 | |
| 2007 | spin_lock(&clp->cl_lock); |
| 2008 | cred = ops->get_state_renewal_cred_locked(clp); |
| 2009 | spin_unlock(&clp->cl_lock); |
| 2010 | if (cred == NULL) |
| 2011 | return -NFS4ERR_NOENT; |
| 2012 | |
| 2013 | clp->cl_mig_gen++; |
| 2014 | restart: |
| 2015 | rcu_read_lock(); |
| 2016 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 2017 | struct inode *inode; |
| 2018 | int status; |
| 2019 | |
| 2020 | if (server->mig_gen == clp->cl_mig_gen) |
| 2021 | continue; |
| 2022 | server->mig_gen = clp->cl_mig_gen; |
| 2023 | |
| 2024 | rcu_read_unlock(); |
| 2025 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 2026 | inode = d_inode(server->super->s_root); |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 2027 | status = nfs4_proc_fsid_present(inode, cred); |
| 2028 | if (status != -NFS4ERR_MOVED) |
| 2029 | goto restart; /* wasn't this one */ |
| 2030 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) |
| 2031 | goto restart; /* there are more */ |
| 2032 | goto out; |
| 2033 | } |
| 2034 | rcu_read_unlock(); |
| 2035 | |
| 2036 | out: |
| 2037 | put_rpccred(cred); |
| 2038 | return 0; |
| 2039 | } |
| 2040 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2041 | /** |
| 2042 | * nfs4_discover_server_trunking - Detect server IP address trunking |
| 2043 | * |
| 2044 | * @clp: nfs_client under test |
| 2045 | * @result: OUT: found nfs_client, or clp |
| 2046 | * |
| 2047 | * Returns zero or a negative errno. If zero is returned, |
| 2048 | * an nfs_client pointer is planted in "result". |
| 2049 | * |
| 2050 | * Note: since we are invoked in process context, and |
| 2051 | * not from inside the state manager, we cannot use |
| 2052 | * nfs4_handle_reclaim_lease_error(). |
| 2053 | */ |
| 2054 | int nfs4_discover_server_trunking(struct nfs_client *clp, |
| 2055 | struct nfs_client **result) |
| 2056 | { |
| 2057 | const struct nfs4_state_recovery_ops *ops = |
| 2058 | clp->cl_mvops->reboot_recovery_ops; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2059 | struct rpc_clnt *clnt; |
| 2060 | struct rpc_cred *cred; |
Chuck Lever | 4edaa30 | 2013-03-16 15:56:20 -0400 | [diff] [blame] | 2061 | int i, status; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2062 | |
| 2063 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); |
| 2064 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2065 | clnt = clp->cl_rpcclient; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2066 | i = 0; |
| 2067 | |
| 2068 | mutex_lock(&nfs_clid_init_mutex); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2069 | again: |
Trond Myklebust | ea33e6c | 2013-04-05 13:22:50 -0400 | [diff] [blame] | 2070 | status = -ENOENT; |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 2071 | cred = nfs4_get_clid_cred(clp); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2072 | if (cred == NULL) |
| 2073 | goto out_unlock; |
| 2074 | |
| 2075 | status = ops->detect_trunking(clp, result, cred); |
| 2076 | put_rpccred(cred); |
| 2077 | switch (status) { |
| 2078 | case 0: |
| 2079 | break; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2080 | case -ETIMEDOUT: |
Trond Myklebust | 150e726 | 2014-03-18 14:23:11 -0400 | [diff] [blame] | 2081 | if (clnt->cl_softrtry) |
| 2082 | break; |
| 2083 | case -NFS4ERR_DELAY: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2084 | case -EAGAIN: |
| 2085 | ssleep(1); |
Trond Myklebust | 202c312 | 2013-01-18 22:56:23 -0500 | [diff] [blame] | 2086 | case -NFS4ERR_STALE_CLIENTID: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2087 | dprintk("NFS: %s after status %d, retrying\n", |
| 2088 | __func__, status); |
| 2089 | goto again; |
Chuck Lever | 4edaa30 | 2013-03-16 15:56:20 -0400 | [diff] [blame] | 2090 | case -EACCES: |
Chuck Lever | d688f7b | 2013-07-24 12:28:28 -0400 | [diff] [blame] | 2091 | if (i++ == 0) { |
| 2092 | nfs4_root_machine_cred(clp); |
| 2093 | goto again; |
| 2094 | } |
Jeff Layton | 6d769f1 | 2013-11-13 09:08:21 -0500 | [diff] [blame] | 2095 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
Chuck Lever | 4edaa30 | 2013-03-16 15:56:20 -0400 | [diff] [blame] | 2096 | break; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2097 | case -NFS4ERR_CLID_INUSE: |
| 2098 | case -NFS4ERR_WRONGSEC: |
Jeff Layton | 6d769f1 | 2013-11-13 09:08:21 -0500 | [diff] [blame] | 2099 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
| 2100 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { |
| 2101 | status = -EPERM; |
| 2102 | break; |
| 2103 | } |
Chuck Lever | 79d852b | 2013-04-22 15:42:48 -0400 | [diff] [blame] | 2104 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2105 | if (IS_ERR(clnt)) { |
| 2106 | status = PTR_ERR(clnt); |
| 2107 | break; |
| 2108 | } |
Trond Myklebust | b193d59 | 2013-04-04 15:55:00 -0400 | [diff] [blame] | 2109 | /* Note: this is safe because we haven't yet marked the |
| 2110 | * client as ready, so we are the only user of |
| 2111 | * clp->cl_rpcclient |
| 2112 | */ |
| 2113 | clnt = xchg(&clp->cl_rpcclient, clnt); |
| 2114 | rpc_shutdown_client(clnt); |
| 2115 | clnt = clp->cl_rpcclient; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2116 | goto again; |
| 2117 | |
| 2118 | case -NFS4ERR_MINOR_VERS_MISMATCH: |
| 2119 | status = -EPROTONOSUPPORT; |
| 2120 | break; |
| 2121 | |
| 2122 | case -EKEYEXPIRED: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2123 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 2124 | * in nfs4_exchange_id */ |
| 2125 | status = -EKEYEXPIRED; |
Trond Myklebust | ea33e6c | 2013-04-05 13:22:50 -0400 | [diff] [blame] | 2126 | break; |
| 2127 | default: |
| 2128 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", |
| 2129 | __func__, status); |
| 2130 | status = -EIO; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2131 | } |
| 2132 | |
| 2133 | out_unlock: |
| 2134 | mutex_unlock(&nfs_clid_init_mutex); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2135 | dprintk("NFS: %s: status = %d\n", __func__, status); |
| 2136 | return status; |
| 2137 | } |
| 2138 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2139 | #ifdef CONFIG_NFS_V4_1 |
Trond Myklebust | 9f59479 | 2012-05-27 13:02:53 -0400 | [diff] [blame] | 2140 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2141 | { |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 2142 | struct nfs_client *clp = session->clp; |
| 2143 | |
Trond Myklebust | 9f59479 | 2012-05-27 13:02:53 -0400 | [diff] [blame] | 2144 | switch (err) { |
| 2145 | default: |
| 2146 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 2147 | break; |
| 2148 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 2149 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 2150 | } |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 2151 | nfs4_schedule_lease_recovery(clp); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2152 | } |
Andy Adamson | cbdabc7f | 2011-03-01 01:34:20 +0000 | [diff] [blame] | 2153 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2154 | |
Anna Schumaker | 3f10a6a | 2015-07-13 14:01:31 -0400 | [diff] [blame] | 2155 | void nfs41_notify_server(struct nfs_client *clp) |
Trond Myklebust | ac07483 | 2012-11-21 09:06:11 -0500 | [diff] [blame] | 2156 | { |
| 2157 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ |
| 2158 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 2159 | nfs4_schedule_state_manager(clp); |
| 2160 | } |
| 2161 | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2162 | static void nfs4_reset_all_state(struct nfs_client *clp) |
| 2163 | { |
| 2164 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2165 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
Trond Myklebust | be0bfed | 2012-05-25 16:02:15 -0400 | [diff] [blame] | 2166 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2167 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2168 | dprintk("%s: scheduling reset of all state for server %s!\n", |
| 2169 | __func__, clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2170 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2171 | } |
| 2172 | } |
| 2173 | |
| 2174 | static void nfs41_handle_server_reboot(struct nfs_client *clp) |
| 2175 | { |
| 2176 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 2177 | nfs4_state_start_reclaim_reboot(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2178 | dprintk("%s: server %s rebooted!\n", __func__, |
| 2179 | clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2180 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2181 | } |
| 2182 | } |
| 2183 | |
Trond Myklebust | 8b895ce | 2015-07-05 15:12:06 -0400 | [diff] [blame] | 2184 | static void nfs41_handle_all_state_revoked(struct nfs_client *clp) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2185 | { |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2186 | nfs4_reset_all_state(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2187 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2188 | } |
| 2189 | |
Trond Myklebust | 8b895ce | 2015-07-05 15:12:06 -0400 | [diff] [blame] | 2190 | static void nfs41_handle_some_state_revoked(struct nfs_client *clp) |
| 2191 | { |
| 2192 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 2193 | nfs4_schedule_state_manager(clp); |
| 2194 | |
| 2195 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
| 2196 | } |
| 2197 | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2198 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
| 2199 | { |
Trond Myklebust | 4099287 | 2015-07-05 15:20:53 -0400 | [diff] [blame] | 2200 | /* FIXME: For now, we destroy all layouts. */ |
| 2201 | pnfs_destroy_all_layouts(clp); |
| 2202 | /* FIXME: For now, we test all delegations+open state+locks. */ |
| 2203 | nfs41_handle_some_state_revoked(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2204 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
| 2205 | clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2206 | } |
| 2207 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2208 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2209 | { |
Trond Myklebust | b135290 | 2015-07-05 15:26:58 -0400 | [diff] [blame] | 2210 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 2211 | nfs4_schedule_state_manager(clp); |
| 2212 | |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2213 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
| 2214 | clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2215 | } |
| 2216 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2217 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
| 2218 | { |
| 2219 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, |
| 2220 | &clp->cl_state) == 0) |
| 2221 | nfs4_schedule_state_manager(clp); |
| 2222 | } |
| 2223 | |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 2224 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
| 2225 | { |
| 2226 | if (!flags) |
| 2227 | return; |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2228 | |
| 2229 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", |
| 2230 | __func__, clp->cl_hostname, clp->cl_clientid, flags); |
| 2231 | |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 2232 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2233 | nfs41_handle_server_reboot(clp); |
Trond Myklebust | 8b895ce | 2015-07-05 15:12:06 -0400 | [diff] [blame] | 2234 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED)) |
| 2235 | nfs41_handle_all_state_revoked(clp); |
| 2236 | if (flags & (SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
Chuck Lever | d1c2331 | 2013-10-17 14:13:58 -0400 | [diff] [blame] | 2237 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
Trond Myklebust | 8b895ce | 2015-07-05 15:12:06 -0400 | [diff] [blame] | 2238 | nfs41_handle_some_state_revoked(clp); |
Chuck Lever | d1c2331 | 2013-10-17 14:13:58 -0400 | [diff] [blame] | 2239 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
| 2240 | nfs4_schedule_lease_moved_recovery(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 2241 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2242 | nfs41_handle_recallable_state_revoked(clp); |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2243 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
| 2244 | nfs41_handle_backchannel_fault(clp); |
| 2245 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
| 2246 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2247 | nfs41_handle_cb_path_down(clp); |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 2248 | } |
| 2249 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2250 | static int nfs4_reset_session(struct nfs_client *clp) |
| 2251 | { |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2252 | struct rpc_cred *cred; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2253 | int status; |
| 2254 | |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2255 | if (!nfs4_has_session(clp)) |
| 2256 | return 0; |
Trond Myklebust | 3804541 | 2009-12-15 17:36:57 -0500 | [diff] [blame] | 2257 | nfs4_begin_drain_session(clp); |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 2258 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2259 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
Trond Myklebust | c489ee2 | 2013-01-30 13:04:10 -0500 | [diff] [blame] | 2260 | switch (status) { |
| 2261 | case 0: |
| 2262 | case -NFS4ERR_BADSESSION: |
| 2263 | case -NFS4ERR_DEADSESSION: |
| 2264 | break; |
| 2265 | case -NFS4ERR_BACK_CHAN_BUSY: |
| 2266 | case -NFS4ERR_DELAY: |
| 2267 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 2268 | status = 0; |
| 2269 | ssleep(1); |
| 2270 | goto out; |
| 2271 | default: |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 2272 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2273 | goto out; |
| 2274 | } |
| 2275 | |
| 2276 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2277 | status = nfs4_proc_create_session(clp, cred); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2278 | if (status) { |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2279 | dprintk("%s: session reset failed with status %d for server %s!\n", |
| 2280 | __func__, status, clp->cl_hostname); |
Trond Myklebust | f2c1b51 | 2012-05-27 14:46:46 -0400 | [diff] [blame] | 2281 | status = nfs4_handle_reclaim_lease_error(clp, status); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2282 | goto out; |
| 2283 | } |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 2284 | nfs41_finish_session_reset(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2285 | dprintk("%s: session reset was successful for server %s!\n", |
| 2286 | __func__, clp->cl_hostname); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2287 | out: |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2288 | if (cred) |
| 2289 | put_rpccred(cred); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2290 | return status; |
| 2291 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2292 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2293 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
| 2294 | { |
Trond Myklebust | 2cf047c | 2012-05-25 17:57:41 -0400 | [diff] [blame] | 2295 | struct rpc_cred *cred; |
| 2296 | int ret; |
| 2297 | |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2298 | if (!nfs4_has_session(clp)) |
| 2299 | return 0; |
Trond Myklebust | 43ac544 | 2012-05-27 13:47:21 -0400 | [diff] [blame] | 2300 | nfs4_begin_drain_session(clp); |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 2301 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 2cf047c | 2012-05-25 17:57:41 -0400 | [diff] [blame] | 2302 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
| 2303 | if (cred) |
| 2304 | put_rpccred(cred); |
Trond Myklebust | 43ac544 | 2012-05-27 13:47:21 -0400 | [diff] [blame] | 2305 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2306 | switch (ret) { |
| 2307 | case 0: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2308 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
| 2309 | __func__, clp->cl_hostname); |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2310 | break; |
| 2311 | case -NFS4ERR_DELAY: |
| 2312 | ssleep(1); |
| 2313 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 2314 | break; |
| 2315 | default: |
| 2316 | return nfs4_recovery_handle_error(clp, ret); |
| 2317 | } |
| 2318 | return 0; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2319 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2320 | #else /* CONFIG_NFS_V4_1 */ |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2321 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2322 | |
| 2323 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
| 2324 | { |
| 2325 | return 0; |
| 2326 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2327 | #endif /* CONFIG_NFS_V4_1 */ |
| 2328 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2329 | static void nfs4_state_manager(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2330 | { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2331 | int status = 0; |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2332 | const char *section = "", *section_sep = ""; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2333 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2334 | /* Ensure exclusive access to NFSv4 state */ |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 2335 | do { |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2336 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2337 | section = "purge state"; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2338 | status = nfs4_purge_lease(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2339 | if (status < 0) |
| 2340 | goto out_error; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2341 | continue; |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2342 | } |
| 2343 | |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2344 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2345 | section = "lease expired"; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2346 | /* We're going to have to re-establish a clientid */ |
| 2347 | status = nfs4_reclaim_lease(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2348 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2349 | goto out_error; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2350 | continue; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 2351 | } |
| 2352 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2353 | /* Initialize or reset the session */ |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2354 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2355 | section = "reset session"; |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 2356 | status = nfs4_reset_session(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2357 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 2358 | continue; |
| 2359 | if (status < 0) |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2360 | goto out_error; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2361 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2362 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2363 | /* Send BIND_CONN_TO_SESSION */ |
| 2364 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2365 | &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2366 | section = "bind conn to session"; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2367 | status = nfs4_bind_conn_to_session(clp); |
| 2368 | if (status < 0) |
| 2369 | goto out_error; |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2370 | continue; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2371 | } |
| 2372 | |
Trond Myklebust | 5df904a | 2012-11-21 09:22:14 -0500 | [diff] [blame] | 2373 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
| 2374 | section = "check lease"; |
| 2375 | status = nfs4_check_lease(clp); |
| 2376 | if (status < 0) |
| 2377 | goto out_error; |
Olga Kornievskaia | 8faaa6d | 2014-09-24 18:11:28 -0400 | [diff] [blame] | 2378 | continue; |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2379 | } |
| 2380 | |
| 2381 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { |
| 2382 | section = "migration"; |
| 2383 | status = nfs4_handle_migration(clp); |
| 2384 | if (status < 0) |
| 2385 | goto out_error; |
Trond Myklebust | 5df904a | 2012-11-21 09:22:14 -0500 | [diff] [blame] | 2386 | } |
| 2387 | |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 2388 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
| 2389 | section = "lease moved"; |
| 2390 | status = nfs4_handle_lease_moved(clp); |
| 2391 | if (status < 0) |
| 2392 | goto out_error; |
| 2393 | } |
| 2394 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2395 | /* First recover reboot state... */ |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 2396 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2397 | section = "reclaim reboot"; |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 2398 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 2399 | clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 2400 | if (status == -EAGAIN) |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2401 | continue; |
| 2402 | if (status < 0) |
| 2403 | goto out_error; |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 2404 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2405 | } |
| 2406 | |
| 2407 | /* Now recover expired state... */ |
| 2408 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2409 | section = "reclaim nograce"; |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 2410 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 2411 | clp->cl_mvops->nograce_recovery_ops); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 2412 | if (status == -EAGAIN) |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2413 | continue; |
| 2414 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2415 | goto out_error; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2416 | } |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 2417 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 2418 | nfs4_end_drain_session(clp); |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 2419 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
| 2420 | nfs_client_return_marked_delegations(clp); |
| 2421 | continue; |
| 2422 | } |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2423 | |
| 2424 | nfs4_clear_state_manager_bit(clp); |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2425 | /* Did we race with an attempt to give us more work? */ |
| 2426 | if (clp->cl_state == 0) |
| 2427 | break; |
| 2428 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 2429 | break; |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 2430 | } while (atomic_read(&clp->cl_count) > 1); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2431 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | out_error: |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2433 | if (strlen(section)) |
| 2434 | section_sep = ": "; |
| 2435 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" |
| 2436 | " with error %d\n", section_sep, section, |
| 2437 | clp->cl_hostname, -status); |
Chuck Lever | ffe5a83 | 2012-09-14 17:23:23 -0400 | [diff] [blame] | 2438 | ssleep(1); |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 2439 | nfs4_end_drain_session(clp); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2440 | nfs4_clear_state_manager_bit(clp); |
| 2441 | } |
| 2442 | |
| 2443 | static int nfs4_run_state_manager(void *ptr) |
| 2444 | { |
| 2445 | struct nfs_client *clp = ptr; |
| 2446 | |
| 2447 | allow_signal(SIGKILL); |
| 2448 | nfs4_state_manager(clp); |
| 2449 | nfs_put_client(clp); |
| 2450 | module_put_and_exit(0); |
| 2451 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2452 | } |
| 2453 | |
| 2454 | /* |
| 2455 | * Local variables: |
| 2456 | * c-basic-offset: 8 |
| 2457 | * End: |
| 2458 | */ |