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" |
Chuck Lever | 511ba52 | 2019-11-05 11:04:07 -0500 | [diff] [blame] | 63 | #include "nfs4trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
Chuck Lever | e3c0fb7 | 2012-05-21 22:45:24 -0400 | [diff] [blame] | 65 | #define NFSDBG_FACILITY NFSDBG_STATE |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #define OPENOWNER_POOL_SIZE 8 |
| 68 | |
Trond Myklebust | 93b717f | 2016-05-16 17:42:43 -0400 | [diff] [blame] | 69 | const nfs4_stateid zero_stateid = { |
Linus Torvalds | e0714ec | 2016-05-27 17:20:27 -0700 | [diff] [blame] | 70 | { .data = { 0 } }, |
Trond Myklebust | 93b717f | 2016-05-16 17:42:43 -0400 | [diff] [blame] | 71 | .type = NFS4_SPECIAL_STATEID_TYPE, |
| 72 | }; |
Trond Myklebust | fcd8843 | 2017-11-07 12:39:44 -0500 | [diff] [blame] | 73 | const nfs4_stateid invalid_stateid = { |
| 74 | { |
Trond Myklebust | 445f288 | 2017-11-18 13:50:11 -0500 | [diff] [blame] | 75 | /* Funky initialiser keeps older gcc versions happy */ |
| 76 | .data = { 0xff, 0xff, 0xff, 0xff, 0 }, |
Trond Myklebust | fcd8843 | 2017-11-07 12:39:44 -0500 | [diff] [blame] | 77 | }, |
| 78 | .type = NFS4_INVALID_STATEID_TYPE, |
| 79 | }; |
| 80 | |
Fred Isaman | 2409a97 | 2016-10-06 12:11:21 -0400 | [diff] [blame] | 81 | const nfs4_stateid current_stateid = { |
| 82 | { |
| 83 | /* Funky initialiser keeps older gcc versions happy */ |
| 84 | .data = { 0x0, 0x0, 0x0, 0x1, 0 }, |
| 85 | }, |
| 86 | .type = NFS4_SPECIAL_STATEID_TYPE, |
| 87 | }; |
| 88 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 89 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Donald Buczek | 5b59683 | 2019-07-07 21:26:10 +0200 | [diff] [blame] | 91 | static int nfs4_setup_state_renewal(struct nfs_client *clp) |
| 92 | { |
| 93 | int status; |
| 94 | struct nfs_fsinfo fsinfo; |
Donald Buczek | 5b59683 | 2019-07-07 21:26:10 +0200 | [diff] [blame] | 95 | |
| 96 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { |
| 97 | nfs4_schedule_state_renewal(clp); |
| 98 | return 0; |
| 99 | } |
| 100 | |
Donald Buczek | 5b59683 | 2019-07-07 21:26:10 +0200 | [diff] [blame] | 101 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
| 102 | if (status == 0) { |
Robert Milkowski | 7dc2993 | 2020-01-30 09:43:25 +0000 | [diff] [blame] | 103 | nfs4_set_lease_period(clp, fsinfo.lease_time * HZ); |
Donald Buczek | 5b59683 | 2019-07-07 21:26:10 +0200 | [diff] [blame] | 104 | nfs4_schedule_state_renewal(clp); |
| 105 | } |
| 106 | |
| 107 | return status; |
| 108 | } |
| 109 | |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 110 | int nfs4_init_clientid(struct nfs_client *clp, const struct cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | { |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 112 | struct nfs4_setclientid_res clid = { |
| 113 | .clientid = clp->cl_clientid, |
| 114 | .confirm = clp->cl_confirm, |
| 115 | }; |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 116 | unsigned short port; |
| 117 | int status; |
Stanislav Kinsbursky | bbe0a3a | 2012-08-20 18:00:36 +0400 | [diff] [blame] | 118 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 119 | |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 120 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
| 121 | goto do_confirm; |
Stanislav Kinsbursky | bbe0a3a | 2012-08-20 18:00:36 +0400 | [diff] [blame] | 122 | port = nn->nfs_callback_tcpport; |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 123 | if (clp->cl_addr.ss_family == AF_INET6) |
Stanislav Kinsbursky | 29dcc16 | 2012-08-20 18:00:41 +0400 | [diff] [blame] | 124 | port = nn->nfs_callback_tcpport6; |
Chuck Lever | f738f51 | 2009-03-18 20:48:06 -0400 | [diff] [blame] | 125 | |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 126 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
| 127 | if (status != 0) |
| 128 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 129 | clp->cl_clientid = clid.clientid; |
| 130 | clp->cl_confirm = clid.confirm; |
| 131 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 132 | do_confirm: |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 133 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
| 134 | if (status != 0) |
| 135 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 136 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Donald Buczek | 5b59683 | 2019-07-07 21:26:10 +0200 | [diff] [blame] | 137 | nfs4_setup_state_renewal(clp); |
Trond Myklebust | bb8b27e | 2010-04-16 16:43:06 -0400 | [diff] [blame] | 138 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | return status; |
| 140 | } |
| 141 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 142 | /** |
| 143 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) |
| 144 | * |
| 145 | * @clp: nfs_client under test |
| 146 | * @result: OUT: found nfs_client, or clp |
| 147 | * @cred: credential to use for trunking test |
| 148 | * |
| 149 | * Returns zero, a negative errno, or a negative NFS4ERR status. |
| 150 | * If zero is returned, an nfs_client pointer is planted in |
| 151 | * "result". |
| 152 | * |
| 153 | * Note: The returned client may not yet be marked ready. |
| 154 | */ |
| 155 | int nfs40_discover_server_trunking(struct nfs_client *clp, |
| 156 | struct nfs_client **result, |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 157 | const struct cred *cred) |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 158 | { |
| 159 | struct nfs4_setclientid_res clid = { |
| 160 | .clientid = clp->cl_clientid, |
| 161 | .confirm = clp->cl_confirm, |
| 162 | }; |
Trond Myklebust | 9f62387 | 2012-10-01 16:17:31 -0700 | [diff] [blame] | 163 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 164 | unsigned short port; |
| 165 | int status; |
| 166 | |
Trond Myklebust | 9f62387 | 2012-10-01 16:17:31 -0700 | [diff] [blame] | 167 | port = nn->nfs_callback_tcpport; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 168 | if (clp->cl_addr.ss_family == AF_INET6) |
Trond Myklebust | 9f62387 | 2012-10-01 16:17:31 -0700 | [diff] [blame] | 169 | port = nn->nfs_callback_tcpport6; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 170 | |
| 171 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
| 172 | if (status != 0) |
| 173 | goto out; |
| 174 | clp->cl_clientid = clid.clientid; |
| 175 | clp->cl_confirm = clid.confirm; |
| 176 | |
| 177 | status = nfs40_walk_client_list(clp, result, cred); |
Trond Myklebust | 202c312 | 2013-01-18 22:56:23 -0500 | [diff] [blame] | 178 | if (status == 0) { |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 179 | /* Sustain the lease, even if it's empty. If the clientid4 |
| 180 | * goes stale it's of no use for trunking discovery. */ |
| 181 | nfs4_schedule_state_renewal(*result); |
ZhangXiaoxu | f02f375 | 2019-05-06 11:57:03 +0800 | [diff] [blame] | 182 | |
| 183 | /* If the client state need to recover, do it. */ |
| 184 | if (clp->cl_state) |
| 185 | nfs4_schedule_state_manager(clp); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 186 | } |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 187 | out: |
| 188 | return status; |
| 189 | } |
| 190 | |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 191 | const struct cred *nfs4_get_machine_cred(struct nfs_client *clp) |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 192 | { |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 193 | return get_cred(rpc_machine_cred()); |
Trond Myklebust | a2b2bb8 | 2008-04-08 16:02:17 -0400 | [diff] [blame] | 194 | } |
| 195 | |
Chuck Lever | d688f7b | 2013-07-24 12:28:28 -0400 | [diff] [blame] | 196 | static void nfs4_root_machine_cred(struct nfs_client *clp) |
| 197 | { |
Chuck Lever | d688f7b | 2013-07-24 12:28:28 -0400 | [diff] [blame] | 198 | |
NeilBrown | 5e16923 | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 199 | /* Force root creds instead of machine */ |
| 200 | clp->cl_principal = NULL; |
| 201 | clp->cl_rpcclient->cl_principal = NULL; |
Chuck Lever | d688f7b | 2013-07-24 12:28:28 -0400 | [diff] [blame] | 202 | } |
| 203 | |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 204 | static const struct cred * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 205 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 206 | { |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 207 | const struct cred *cred = NULL; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 208 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 209 | struct rb_node *pos; |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 210 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 211 | for (pos = rb_first(&server->state_owners); |
| 212 | pos != NULL; |
| 213 | pos = rb_next(pos)) { |
| 214 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 215 | if (list_empty(&sp->so_states)) |
| 216 | continue; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 217 | cred = get_cred(sp->so_cred); |
Trond Myklebust | b4454fe | 2006-01-03 09:55:25 +0100 | [diff] [blame] | 218 | break; |
| 219 | } |
| 220 | return cred; |
| 221 | } |
| 222 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 223 | /** |
NeilBrown | f15e1e8 | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 224 | * nfs4_get_renew_cred - Acquire credential for a renew operation |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 225 | * @clp: client state handle |
| 226 | * |
| 227 | * Returns an rpc_cred with reference count bumped, or NULL. |
| 228 | * Caller must hold clp->cl_lock. |
| 229 | */ |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 230 | const struct cred *nfs4_get_renew_cred(struct nfs_client *clp) |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 231 | { |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 232 | const struct cred *cred = NULL; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 233 | struct nfs_server *server; |
| 234 | |
Sachin Prabhu | e49a29b | 2012-03-16 19:25:52 +0000 | [diff] [blame] | 235 | /* Use machine credentials if available */ |
NeilBrown | f15e1e8 | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 236 | cred = nfs4_get_machine_cred(clp); |
Sachin Prabhu | e49a29b | 2012-03-16 19:25:52 +0000 | [diff] [blame] | 237 | if (cred != NULL) |
| 238 | goto out; |
| 239 | |
NeilBrown | f15e1e8 | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 240 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 241 | rcu_read_lock(); |
| 242 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 243 | cred = nfs4_get_renew_cred_server_locked(server); |
| 244 | if (cred != NULL) |
| 245 | break; |
| 246 | } |
| 247 | rcu_read_unlock(); |
NeilBrown | f15e1e8 | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 248 | spin_unlock(&clp->cl_lock); |
Sachin Prabhu | e49a29b | 2012-03-16 19:25:52 +0000 | [diff] [blame] | 249 | |
| 250 | out: |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 251 | return cred; |
| 252 | } |
| 253 | |
Andy Adamson | 62f288a | 2013-06-19 16:39:44 -0400 | [diff] [blame] | 254 | static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 255 | { |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 256 | 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] | 257 | spin_lock(&tbl->slot_tbl_lock); |
Trond Myklebust | b75ad4c | 2012-11-29 17:27:47 -0500 | [diff] [blame] | 258 | nfs41_wake_slot_table(tbl); |
Trond Myklebust | 961a828 | 2012-01-17 22:57:37 -0500 | [diff] [blame] | 259 | spin_unlock(&tbl->slot_tbl_lock); |
Alexandros Batsakis | 689cf5c | 2009-12-14 21:27:56 -0800 | [diff] [blame] | 260 | } |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 261 | } |
| 262 | |
Andy Adamson | 62f288a | 2013-06-19 16:39:44 -0400 | [diff] [blame] | 263 | static void nfs4_end_drain_session(struct nfs_client *clp) |
| 264 | { |
| 265 | struct nfs4_session *ses = clp->cl_session; |
| 266 | |
Chuck Lever | 2cf8bca | 2013-08-09 12:49:56 -0400 | [diff] [blame] | 267 | if (clp->cl_slot_tbl) { |
| 268 | nfs4_end_drain_slot_table(clp->cl_slot_tbl); |
| 269 | return; |
| 270 | } |
| 271 | |
Andy Adamson | 62f288a | 2013-06-19 16:39:44 -0400 | [diff] [blame] | 272 | if (ses != NULL) { |
| 273 | nfs4_end_drain_slot_table(&ses->bc_slot_table); |
| 274 | nfs4_end_drain_slot_table(&ses->fc_slot_table); |
| 275 | } |
| 276 | } |
| 277 | |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 278 | static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 279 | { |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 280 | set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 281 | spin_lock(&tbl->slot_tbl_lock); |
Andy Adamson | b6bf6e7 | 2012-02-17 13:05:23 -0500 | [diff] [blame] | 282 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
Wolfram Sang | 16735d0 | 2013-11-14 14:32:02 -0800 | [diff] [blame] | 283 | reinit_completion(&tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 284 | spin_unlock(&tbl->slot_tbl_lock); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 285 | return wait_for_completion_interruptible(&tbl->complete); |
Ricardo Labiaga | 9dfdf40 | 2009-12-06 12:57:34 -0500 | [diff] [blame] | 286 | } |
| 287 | spin_unlock(&tbl->slot_tbl_lock); |
| 288 | return 0; |
| 289 | } |
| 290 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 291 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
| 292 | { |
| 293 | struct nfs4_session *ses = clp->cl_session; |
Trond Myklebust | 8aafd2f | 2018-08-11 11:52:38 -0400 | [diff] [blame] | 294 | int ret; |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 295 | |
Chuck Lever | 2cf8bca | 2013-08-09 12:49:56 -0400 | [diff] [blame] | 296 | if (clp->cl_slot_tbl) |
| 297 | return nfs4_drain_slot_tbl(clp->cl_slot_tbl); |
| 298 | |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 299 | /* back channel */ |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 300 | ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 301 | if (ret) |
| 302 | return ret; |
| 303 | /* fore channel */ |
Andy Adamson | 774d5f1 | 2013-05-20 14:13:50 -0400 | [diff] [blame] | 304 | return nfs4_drain_slot_tbl(&ses->fc_slot_table); |
Andy Adamson | 42acd02 | 2011-01-06 02:04:34 +0000 | [diff] [blame] | 305 | } |
| 306 | |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 307 | #if defined(CONFIG_NFS_V4_1) |
| 308 | |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 309 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
| 310 | { |
| 311 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 312 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 313 | /* create_session negotiated new slot table */ |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 314 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
Donald Buczek | ea51efa | 2019-07-07 21:26:09 +0200 | [diff] [blame] | 315 | nfs4_setup_state_renewal(clp); |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 316 | } |
| 317 | |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 318 | int nfs41_init_clientid(struct nfs_client *clp, const struct cred *cred) |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 319 | { |
| 320 | int status; |
| 321 | |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 322 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
| 323 | goto do_confirm; |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 324 | status = nfs4_proc_exchange_id(clp, cred); |
Ricardo Labiaga | 9430fb6b | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 325 | if (status != 0) |
| 326 | goto out; |
Trond Myklebust | fd954ae | 2011-04-24 14:28:18 -0400 | [diff] [blame] | 327 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 328 | do_confirm: |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 329 | status = nfs4_proc_create_session(clp, cred); |
Ricardo Labiaga | 9430fb6b | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 330 | if (status != 0) |
| 331 | goto out; |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 332 | nfs41_finish_session_reset(clp); |
Ricardo Labiaga | 9430fb6b | 2009-12-06 12:23:46 -0500 | [diff] [blame] | 333 | nfs_mark_client_ready(clp, NFS_CS_READY); |
| 334 | out: |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 335 | return status; |
| 336 | } |
| 337 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 338 | /** |
| 339 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) |
| 340 | * |
| 341 | * @clp: nfs_client under test |
| 342 | * @result: OUT: found nfs_client, or clp |
| 343 | * @cred: credential to use for trunking test |
| 344 | * |
| 345 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. |
| 346 | * If NFS4_OK is returned, an nfs_client pointer is planted in |
| 347 | * "result". |
| 348 | * |
| 349 | * Note: The returned client may not yet be marked ready. |
| 350 | */ |
| 351 | int nfs41_discover_server_trunking(struct nfs_client *clp, |
| 352 | struct nfs_client **result, |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 353 | const struct cred *cred) |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 354 | { |
| 355 | int status; |
| 356 | |
| 357 | status = nfs4_proc_exchange_id(clp, cred); |
| 358 | if (status != NFS4_OK) |
| 359 | return status; |
| 360 | |
Trond Myklebust | 48d66b9 | 2015-03-03 20:28:59 -0500 | [diff] [blame] | 361 | status = nfs41_walk_client_list(clp, result, cred); |
| 362 | if (status < 0) |
| 363 | return status; |
| 364 | if (clp != *result) |
| 365 | return 0; |
| 366 | |
Chuck Lever | 8dcbec6 | 2017-06-08 11:52:44 -0400 | [diff] [blame] | 367 | /* |
| 368 | * Purge state if the client id was established in a prior |
| 369 | * instance and the client id could not have arrived on the |
| 370 | * server via Transparent State Migration. |
| 371 | */ |
| 372 | if (clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R) { |
| 373 | if (!test_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags)) |
| 374 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
| 375 | else |
| 376 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 377 | } |
Trond Myklebust | 48d66b9 | 2015-03-03 20:28:59 -0500 | [diff] [blame] | 378 | nfs4_schedule_state_manager(clp); |
| 379 | status = nfs_wait_client_init_complete(clp); |
| 380 | if (status < 0) |
| 381 | nfs_put_client(clp); |
| 382 | return status; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 383 | } |
| 384 | |
Andy Adamson | b4b8260 | 2009-04-01 09:22:49 -0400 | [diff] [blame] | 385 | #endif /* CONFIG_NFS_V4_1 */ |
| 386 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 387 | /** |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 388 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 389 | * @clp: client state handle |
| 390 | * |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 391 | * Returns a cred with reference count bumped, or NULL. |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 392 | */ |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 393 | const struct cred *nfs4_get_clid_cred(struct nfs_client *clp) |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 394 | { |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 395 | const struct cred *cred; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 396 | |
NeilBrown | f15e1e8 | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 397 | cred = nfs4_get_machine_cred(clp); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 398 | return cred; |
| 399 | } |
| 400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | static struct nfs4_state_owner * |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 402 | nfs4_find_state_owner_locked(struct nfs_server *server, const struct cred *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 404 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 405 | *parent = NULL; |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 406 | struct nfs4_state_owner *sp; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 407 | int cmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 409 | while (*p != NULL) { |
| 410 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 411 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 412 | cmp = cred_fscmp(cred, sp->so_cred); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 413 | |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 414 | if (cmp < 0) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 415 | p = &parent->rb_left; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 416 | else if (cmp > 0) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 417 | p = &parent->rb_right; |
| 418 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 419 | if (!list_empty(&sp->so_lru)) |
| 420 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 421 | atomic_inc(&sp->so_count); |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 422 | return sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 423 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } |
Chuck Lever | 414adf1 | 2011-12-06 16:13:39 -0500 | [diff] [blame] | 425 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | } |
| 427 | |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 428 | static struct nfs4_state_owner * |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 429 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 430 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 431 | struct nfs_server *server = new->so_server; |
| 432 | struct rb_node **p = &server->state_owners.rb_node, |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 433 | *parent = NULL; |
| 434 | struct nfs4_state_owner *sp; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 435 | int cmp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 436 | |
| 437 | while (*p != NULL) { |
| 438 | parent = *p; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 439 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 440 | cmp = cred_fscmp(new->so_cred, sp->so_cred); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 441 | |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 442 | if (cmp < 0) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 443 | p = &parent->rb_left; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 444 | else if (cmp > 0) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 445 | p = &parent->rb_right; |
| 446 | else { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 447 | if (!list_empty(&sp->so_lru)) |
| 448 | list_del_init(&sp->so_lru); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 449 | atomic_inc(&sp->so_count); |
| 450 | return sp; |
| 451 | } |
| 452 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 453 | rb_link_node(&new->so_server_node, parent, p); |
| 454 | rb_insert_color(&new->so_server_node, &server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 455 | return new; |
| 456 | } |
| 457 | |
| 458 | static void |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 459 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 460 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 461 | struct nfs_server *server = sp->so_server; |
| 462 | |
| 463 | if (!RB_EMPTY_NODE(&sp->so_server_node)) |
| 464 | rb_erase(&sp->so_server_node, &server->state_owners); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 465 | } |
| 466 | |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 467 | static void |
| 468 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) |
| 469 | { |
Trond Myklebust | 95b72eb | 2012-04-20 19:24:51 -0400 | [diff] [blame] | 470 | sc->create_time = ktime_get(); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 471 | sc->flags = 0; |
| 472 | sc->counter = 0; |
| 473 | spin_lock_init(&sc->lock); |
| 474 | INIT_LIST_HEAD(&sc->list); |
| 475 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); |
| 476 | } |
| 477 | |
| 478 | static void |
| 479 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) |
| 480 | { |
| 481 | rpc_destroy_wait_queue(&sc->wait); |
| 482 | } |
| 483 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | /* |
| 485 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to |
| 486 | * create a new state_owner. |
| 487 | * |
| 488 | */ |
| 489 | static struct nfs4_state_owner * |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 490 | nfs4_alloc_state_owner(struct nfs_server *server, |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 491 | const struct cred *cred, |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 492 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | { |
| 494 | struct nfs4_state_owner *sp; |
| 495 | |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 496 | sp = kzalloc(sizeof(*sp), gfp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | if (!sp) |
| 498 | return NULL; |
Matthew Wilcox | aae5730 | 2018-03-14 19:48:27 -0700 | [diff] [blame] | 499 | sp->so_seqid.owner_id = ida_simple_get(&server->openowner_id, 0, 0, |
| 500 | gfp_flags); |
| 501 | if (sp->so_seqid.owner_id < 0) { |
| 502 | kfree(sp); |
| 503 | return NULL; |
| 504 | } |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 505 | sp->so_server = server; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 506 | sp->so_cred = get_cred(cred); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 507 | spin_lock_init(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | INIT_LIST_HEAD(&sp->so_states); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 509 | nfs4_init_seqid_counter(&sp->so_seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | atomic_set(&sp->so_count, 1); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 511 | INIT_LIST_HEAD(&sp->so_lru); |
Ahmed S. Darwish | 76246c9 | 2020-07-20 17:55:27 +0200 | [diff] [blame] | 512 | seqcount_spinlock_init(&sp->so_reclaim_seqcount, &sp->so_lock); |
Trond Myklebust | 65b62a2 | 2013-02-07 10:54:07 -0500 | [diff] [blame] | 513 | mutex_init(&sp->so_delegreturn_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | return sp; |
| 515 | } |
| 516 | |
Adrian Bunk | 1d2e88e | 2008-05-02 13:42:45 -0700 | [diff] [blame] | 517 | static void |
NeilBrown | 86cfb04 | 2016-12-19 11:48:23 +1100 | [diff] [blame] | 518 | nfs4_reset_state_owner(struct nfs4_state_owner *sp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | { |
NeilBrown | 86cfb04 | 2016-12-19 11:48:23 +1100 | [diff] [blame] | 520 | /* This state_owner is no longer usable, but must |
| 521 | * remain in place so that state recovery can find it |
| 522 | * and the opens associated with it. |
| 523 | * It may also be used for new 'open' request to |
| 524 | * return a delegation to the server. |
| 525 | * So update the 'create_time' so that it looks like |
| 526 | * a new state_owner. This will cause the server to |
| 527 | * request an OPEN_CONFIRM to start a new sequence. |
| 528 | */ |
| 529 | sp->so_seqid.create_time = ktime_get(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | } |
| 531 | |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 532 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
| 533 | { |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 534 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 535 | put_cred(sp->so_cred); |
Matthew Wilcox | aae5730 | 2018-03-14 19:48:27 -0700 | [diff] [blame] | 536 | ida_simple_remove(&sp->so_server->openowner_id, sp->so_seqid.owner_id); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 537 | kfree(sp); |
| 538 | } |
| 539 | |
| 540 | static void nfs4_gc_state_owners(struct nfs_server *server) |
| 541 | { |
| 542 | struct nfs_client *clp = server->nfs_client; |
| 543 | struct nfs4_state_owner *sp, *tmp; |
| 544 | unsigned long time_min, time_max; |
| 545 | LIST_HEAD(doomed); |
| 546 | |
| 547 | spin_lock(&clp->cl_lock); |
| 548 | time_max = jiffies; |
| 549 | time_min = (long)time_max - (long)clp->cl_lease_time; |
| 550 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
| 551 | /* NB: LRU is sorted so that oldest is at the head */ |
| 552 | if (time_in_range(sp->so_expires, time_min, time_max)) |
| 553 | break; |
| 554 | list_move(&sp->so_lru, &doomed); |
| 555 | nfs4_remove_state_owner_locked(sp); |
| 556 | } |
| 557 | spin_unlock(&clp->cl_lock); |
| 558 | |
| 559 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { |
| 560 | list_del(&sp->so_lru); |
| 561 | nfs4_free_state_owner(sp); |
| 562 | } |
| 563 | } |
| 564 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 565 | /** |
| 566 | * nfs4_get_state_owner - Look up a state owner given a credential |
| 567 | * @server: nfs_server to search |
| 568 | * @cred: RPC credential to match |
Trond Myklebust | 302fad7 | 2019-02-18 13:32:38 -0500 | [diff] [blame] | 569 | * @gfp_flags: allocation mode |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 570 | * |
| 571 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. |
| 572 | */ |
| 573 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 574 | const struct cred *cred, |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 575 | gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | { |
David Howells | 7539bba | 2006-08-22 20:06:09 -0400 | [diff] [blame] | 577 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | struct nfs4_state_owner *sp, *new; |
| 579 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | spin_lock(&clp->cl_lock); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 581 | sp = nfs4_find_state_owner_locked(server, cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | spin_unlock(&clp->cl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | if (sp != NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 584 | goto out; |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 585 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 586 | if (new == NULL) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 587 | goto out; |
Matthew Wilcox | aae5730 | 2018-03-14 19:48:27 -0700 | [diff] [blame] | 588 | spin_lock(&clp->cl_lock); |
| 589 | sp = nfs4_insert_state_owner_locked(new); |
| 590 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | d1e284d | 2012-01-17 22:04:24 -0500 | [diff] [blame] | 591 | if (sp != new) |
| 592 | nfs4_free_state_owner(new); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 593 | out: |
| 594 | nfs4_gc_state_owners(server); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 595 | return sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | } |
| 597 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 598 | /** |
| 599 | * nfs4_put_state_owner - Release a nfs4_state_owner |
| 600 | * @sp: state owner data to release |
Trond Myklebust | 7bf97bc | 2012-04-21 12:36:19 -0400 | [diff] [blame] | 601 | * |
| 602 | * Note that we keep released state owners on an LRU |
| 603 | * list. |
| 604 | * This caches valid state owners so that they can be |
| 605 | * reused, to avoid the OPEN_CONFIRM on minor version 0. |
| 606 | * It also pins the uniquifier of dropped state owners for |
| 607 | * a while, to ensure that those state owner names are |
| 608 | * never reused. |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 609 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
| 611 | { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 612 | struct nfs_server *server = sp->so_server; |
| 613 | struct nfs_client *clp = server->nfs_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
| 615 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) |
| 616 | return; |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 617 | |
Trond Myklebust | 7bf97bc | 2012-04-21 12:36:19 -0400 | [diff] [blame] | 618 | sp->so_expires = jiffies; |
| 619 | list_add_tail(&sp->so_lru, &server->state_owners_lru); |
| 620 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 621 | } |
| 622 | |
| 623 | /** |
| 624 | * nfs4_purge_state_owners - Release all cached state owners |
| 625 | * @server: nfs_server with cached state owners to release |
Trond Myklebust | c77e228 | 2019-08-03 10:11:27 -0400 | [diff] [blame] | 626 | * @head: resulting list of state owners |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 627 | * |
| 628 | * Called at umount time. Remaining state owners will be on |
| 629 | * the LRU with ref count of zero. |
Trond Myklebust | c77e228 | 2019-08-03 10:11:27 -0400 | [diff] [blame] | 630 | * Note that the state owners are not freed, but are added |
| 631 | * to the list @head, which can later be used as an argument |
| 632 | * to nfs4_free_state_owners. |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 633 | */ |
Trond Myklebust | c77e228 | 2019-08-03 10:11:27 -0400 | [diff] [blame] | 634 | void nfs4_purge_state_owners(struct nfs_server *server, struct list_head *head) |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 635 | { |
| 636 | struct nfs_client *clp = server->nfs_client; |
| 637 | struct nfs4_state_owner *sp, *tmp; |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 638 | |
| 639 | spin_lock(&clp->cl_lock); |
| 640 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { |
Trond Myklebust | c77e228 | 2019-08-03 10:11:27 -0400 | [diff] [blame] | 641 | list_move(&sp->so_lru, head); |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 642 | nfs4_remove_state_owner_locked(sp); |
| 643 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | c77e228 | 2019-08-03 10:11:27 -0400 | [diff] [blame] | 645 | } |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 646 | |
Trond Myklebust | c77e228 | 2019-08-03 10:11:27 -0400 | [diff] [blame] | 647 | /** |
Trond Myklebust | 6453bcd | 2021-03-04 20:29:50 -0500 | [diff] [blame] | 648 | * nfs4_free_state_owners - Release all cached state owners |
Trond Myklebust | c77e228 | 2019-08-03 10:11:27 -0400 | [diff] [blame] | 649 | * @head: resulting list of state owners |
| 650 | * |
| 651 | * Frees a list of state owners that was generated by |
| 652 | * nfs4_purge_state_owners |
| 653 | */ |
| 654 | void nfs4_free_state_owners(struct list_head *head) |
| 655 | { |
| 656 | struct nfs4_state_owner *sp, *tmp; |
| 657 | |
| 658 | list_for_each_entry_safe(sp, tmp, head, so_lru) { |
Chuck Lever | 0aaaf5c | 2011-12-06 16:13:48 -0500 | [diff] [blame] | 659 | list_del(&sp->so_lru); |
| 660 | nfs4_free_state_owner(sp); |
| 661 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | static struct nfs4_state * |
| 665 | nfs4_alloc_open_state(void) |
| 666 | { |
| 667 | struct nfs4_state *state; |
| 668 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 669 | state = kzalloc(sizeof(*state), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | if (!state) |
| 671 | return NULL; |
Trond Myklebust | ace9fad | 2018-09-02 19:19:07 -0400 | [diff] [blame] | 672 | refcount_set(&state->count, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | INIT_LIST_HEAD(&state->lock_states); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 674 | spin_lock_init(&state->state_lock); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 675 | seqlock_init(&state->seqlock); |
Trond Myklebust | c9399f2 | 2017-11-06 15:28:01 -0500 | [diff] [blame] | 676 | init_waitqueue_head(&state->waitq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | return state; |
| 678 | } |
| 679 | |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 680 | void |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 681 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 682 | { |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 683 | if (state->state == fmode) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 684 | return; |
| 685 | /* NB! List reordering - see the reclaim code for why. */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 686 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
| 687 | if (fmode & FMODE_WRITE) |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 688 | list_move(&state->open_states, &state->owner->so_states); |
| 689 | else |
| 690 | list_move_tail(&state->open_states, &state->owner->so_states); |
| 691 | } |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 692 | state->state = fmode; |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 693 | } |
| 694 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | static struct nfs4_state * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) |
| 697 | { |
| 698 | struct nfs_inode *nfsi = NFS_I(inode); |
| 699 | struct nfs4_state *state; |
| 700 | |
Trond Myklebust | 9ae075f | 2018-09-02 19:15:15 -0400 | [diff] [blame] | 701 | list_for_each_entry_rcu(state, &nfsi->open_states, inode_states) { |
Trond Myklebust | 1c816ef | 2007-07-03 14:41:19 -0400 | [diff] [blame] | 702 | if (state->owner != owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | continue; |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 704 | if (!nfs4_valid_open_stateid(state)) |
| 705 | continue; |
Trond Myklebust | ace9fad | 2018-09-02 19:19:07 -0400 | [diff] [blame] | 706 | if (refcount_inc_not_zero(&state->count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | return state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | } |
| 709 | return NULL; |
| 710 | } |
| 711 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | static void |
| 713 | nfs4_free_open_state(struct nfs4_state *state) |
| 714 | { |
Trond Myklebust | 9ae075f | 2018-09-02 19:15:15 -0400 | [diff] [blame] | 715 | kfree_rcu(state, rcu_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | } |
| 717 | |
| 718 | struct nfs4_state * |
| 719 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) |
| 720 | { |
| 721 | struct nfs4_state *state, *new; |
| 722 | struct nfs_inode *nfsi = NFS_I(inode); |
| 723 | |
Trond Myklebust | 9ae075f | 2018-09-02 19:15:15 -0400 | [diff] [blame] | 724 | rcu_read_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | state = __nfs4_find_state_byowner(inode, owner); |
Trond Myklebust | 9ae075f | 2018-09-02 19:15:15 -0400 | [diff] [blame] | 726 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | if (state) |
| 728 | goto out; |
| 729 | new = nfs4_alloc_open_state(); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 730 | spin_lock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | spin_lock(&inode->i_lock); |
| 732 | state = __nfs4_find_state_byowner(inode, owner); |
| 733 | if (state == NULL && new != NULL) { |
| 734 | state = new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | state->owner = owner; |
| 736 | atomic_inc(&owner->so_count); |
Dave Chinner | 0444d76 | 2011-03-29 18:08:50 +1100 | [diff] [blame] | 737 | ihold(inode); |
| 738 | state->inode = inode; |
J. Bruce Fields | 29fe839 | 2020-05-11 10:02:48 -0400 | [diff] [blame] | 739 | list_add_rcu(&state->inode_states, &nfsi->open_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 741 | /* Note: The reclaim code dictates that we add stateless |
| 742 | * and read-only stateids to the end of the list */ |
| 743 | list_add_tail(&state->open_states, &owner->so_states); |
| 744 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | } else { |
| 746 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 747 | spin_unlock(&owner->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | if (new) |
| 749 | nfs4_free_open_state(new); |
| 750 | } |
| 751 | out: |
| 752 | return state; |
| 753 | } |
| 754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | void nfs4_put_open_state(struct nfs4_state *state) |
| 756 | { |
| 757 | struct inode *inode = state->inode; |
| 758 | struct nfs4_state_owner *owner = state->owner; |
| 759 | |
Trond Myklebust | ace9fad | 2018-09-02 19:19:07 -0400 | [diff] [blame] | 760 | if (!refcount_dec_and_lock(&state->count, &owner->so_lock)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | return; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 762 | spin_lock(&inode->i_lock); |
Trond Myklebust | 9ae075f | 2018-09-02 19:15:15 -0400 | [diff] [blame] | 763 | list_del_rcu(&state->inode_states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | list_del(&state->open_states); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 765 | spin_unlock(&inode->i_lock); |
| 766 | spin_unlock(&owner->so_lock); |
Trond Myklebust | b7b7dac | 2020-01-27 09:58:17 -0500 | [diff] [blame] | 767 | nfs4_inode_return_delegation_on_close(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | iput(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | nfs4_free_open_state(state); |
| 770 | nfs4_put_state_owner(owner); |
| 771 | } |
| 772 | |
| 773 | /* |
Trond Myklebust | 83c9d41 | 2005-10-18 14:20:13 -0700 | [diff] [blame] | 774 | * Close the current file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | */ |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 776 | static void __nfs4_close(struct nfs4_state *state, |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 777 | fmode_t fmode, gfp_t gfp_mask, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | struct nfs4_state_owner *owner = state->owner; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 780 | int call_close = 0; |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 781 | fmode_t newstate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
| 783 | atomic_inc(&owner->so_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | /* Protect against nfs4_find_state() */ |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 785 | spin_lock(&owner->so_lock); |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 786 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 787 | case FMODE_READ: |
| 788 | state->n_rdonly--; |
| 789 | break; |
| 790 | case FMODE_WRITE: |
| 791 | state->n_wronly--; |
| 792 | break; |
| 793 | case FMODE_READ|FMODE_WRITE: |
| 794 | state->n_rdwr--; |
| 795 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 796 | newstate = FMODE_READ|FMODE_WRITE; |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 797 | if (state->n_rdwr == 0) { |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 798 | if (state->n_rdonly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 799 | newstate &= ~FMODE_READ; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 800 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 801 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 802 | } |
| 803 | if (state->n_wronly == 0) { |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 804 | newstate &= ~FMODE_WRITE; |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 805 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 806 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); |
| 807 | } |
| 808 | if (newstate == 0) |
| 809 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
Trond Myklebust | e761692 | 2006-01-03 09:55:13 +0100 | [diff] [blame] | 810 | } |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 811 | nfs4_state_set_mode_locked(state, newstate); |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 812 | spin_unlock(&owner->so_lock); |
Trond Myklebust | 4cecb76 | 2005-11-04 15:32:58 -0500 | [diff] [blame] | 813 | |
Trond Myklebust | 003707c | 2007-07-05 18:07:55 -0400 | [diff] [blame] | 814 | if (!call_close) { |
Trond Myklebust | b39e625 | 2007-06-11 23:05:07 -0400 | [diff] [blame] | 815 | nfs4_put_open_state(state); |
| 816 | nfs4_put_state_owner(owner); |
Trond Myklebust | 1f7977c | 2012-09-20 20:31:51 -0400 | [diff] [blame] | 817 | } else |
| 818 | nfs4_do_close(state, gfp_mask, wait); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 819 | } |
| 820 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 821 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 822 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 823 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 824 | } |
| 825 | |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 826 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 827 | { |
Al Viro | 643168c | 2011-06-22 18:20:23 -0400 | [diff] [blame] | 828 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | } |
| 830 | |
| 831 | /* |
| 832 | * Search the state->lock_states for an existing lock_owner |
NeilBrown | 3f8f254 | 2016-12-19 11:33:13 +1100 | [diff] [blame] | 833 | * that is compatible with either of the given owners. |
| 834 | * If the second is non-zero, then the first refers to a Posix-lock |
| 835 | * owner (current->files) and the second refers to a flock/OFD |
| 836 | * owner (struct file*). In that case, prefer a match for the first |
| 837 | * owner. |
| 838 | * If both sorts of locks are held on the one file we cannot know |
| 839 | * which stateid was intended to be used, so a "correct" choice cannot |
| 840 | * be made. Failing that, a "consistent" choice is preferable. The |
| 841 | * consistent choice we make is to prefer the first owner, that of a |
| 842 | * Posix lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | */ |
| 844 | static struct nfs4_lock_state * |
NeilBrown | 8d42443 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 845 | __nfs4_find_lock_state(struct nfs4_state *state, |
| 846 | fl_owner_t fl_owner, fl_owner_t fl_owner2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | { |
NeilBrown | 3f8f254 | 2016-12-19 11:33:13 +1100 | [diff] [blame] | 848 | struct nfs4_lock_state *pos, *ret = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
NeilBrown | 3f8f254 | 2016-12-19 11:33:13 +1100 | [diff] [blame] | 850 | if (pos->ls_owner == fl_owner) { |
| 851 | ret = pos; |
| 852 | break; |
| 853 | } |
| 854 | if (pos->ls_owner == fl_owner2) |
| 855 | ret = pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | } |
NeilBrown | 3f8f254 | 2016-12-19 11:33:13 +1100 | [diff] [blame] | 857 | if (ret) |
Elena Reshetova | 194bc1f | 2017-10-20 12:53:36 +0300 | [diff] [blame] | 858 | refcount_inc(&ret->ls_count); |
NeilBrown | 3f8f254 | 2016-12-19 11:33:13 +1100 | [diff] [blame] | 859 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | } |
| 861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | /* |
| 863 | * Return a compatible lock_state. If no initialized lock_state structure |
| 864 | * exists, return an uninitialized one. |
| 865 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | */ |
Jeff Layton | 8003d3c4 | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 867 | 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] | 868 | { |
| 869 | struct nfs4_lock_state *lsp; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 870 | struct nfs_server *server = state->owner->so_server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 872 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | if (lsp == NULL) |
| 874 | return NULL; |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 875 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
Elena Reshetova | 194bc1f | 2017-10-20 12:53:36 +0300 | [diff] [blame] | 876 | refcount_set(&lsp->ls_count, 1); |
Trond Myklebust | b64aec8 | 2009-07-21 16:47:46 -0400 | [diff] [blame] | 877 | lsp->ls_state = state; |
Jeff Layton | 8003d3c4 | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 878 | lsp->ls_owner = fl_owner; |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 879 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
| 880 | if (lsp->ls_seqid.owner_id < 0) |
Trond Myklebust | d2d7ce2 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 881 | goto out_free; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 882 | INIT_LIST_HEAD(&lsp->ls_locks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | return lsp; |
Trond Myklebust | d2d7ce2 | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 884 | out_free: |
| 885 | kfree(lsp); |
| 886 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | } |
| 888 | |
Trond Myklebust | 5ae67c4 | 2012-03-19 16:17:18 -0400 | [diff] [blame] | 889 | 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] | 890 | { |
Trond Myklebust | 48c22eb | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 891 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
Trond Myklebust | 7ba127a | 2012-01-17 22:04:25 -0500 | [diff] [blame] | 892 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 893 | kfree(lsp); |
| 894 | } |
| 895 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | /* |
| 897 | * Return a compatible lock_state. If no initialized lock_state structure |
| 898 | * exists, return an uninitialized one. |
| 899 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | */ |
Jeff Layton | 8003d3c4 | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 901 | 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] | 902 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 903 | struct nfs4_lock_state *lsp, *new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 905 | for(;;) { |
| 906 | spin_lock(&state->state_lock); |
Wei Yongjun | 68e33bd | 2017-01-12 15:39:18 +0000 | [diff] [blame] | 907 | lsp = __nfs4_find_lock_state(state, owner, NULL); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 908 | if (lsp != NULL) |
| 909 | break; |
| 910 | if (new != NULL) { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 911 | list_add(&new->ls_locks, &state->lock_states); |
| 912 | set_bit(LK_STATE_IN_USE, &state->flags); |
| 913 | lsp = new; |
| 914 | new = NULL; |
| 915 | break; |
| 916 | } |
| 917 | spin_unlock(&state->state_lock); |
Jeff Layton | 8003d3c4 | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 918 | new = nfs4_alloc_lock_state(state, owner); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 919 | if (new == NULL) |
| 920 | return NULL; |
| 921 | } |
| 922 | spin_unlock(&state->state_lock); |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 923 | if (new != NULL) |
Trond Myklebust | 5ae67c4 | 2012-03-19 16:17:18 -0400 | [diff] [blame] | 924 | nfs4_free_lock_state(state->owner->so_server, new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | return lsp; |
| 926 | } |
| 927 | |
| 928 | /* |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 929 | * Release reference to lock_state, and free it if we see that |
| 930 | * it is no longer in use |
| 931 | */ |
Trond Myklebust | faf5f49 | 2005-10-18 14:20:15 -0700 | [diff] [blame] | 932 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 933 | { |
Trond Myklebust | c8b2d0b | 2013-05-03 16:22:55 -0400 | [diff] [blame] | 934 | struct nfs_server *server; |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 935 | struct nfs4_state *state; |
| 936 | |
| 937 | if (lsp == NULL) |
| 938 | return; |
| 939 | state = lsp->ls_state; |
Elena Reshetova | 194bc1f | 2017-10-20 12:53:36 +0300 | [diff] [blame] | 940 | if (!refcount_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 941 | return; |
| 942 | list_del(&lsp->ls_locks); |
| 943 | if (list_empty(&state->lock_states)) |
| 944 | clear_bit(LK_STATE_IN_USE, &state->flags); |
| 945 | spin_unlock(&state->state_lock); |
Jeff Layton | 0c0e0d3 | 2014-09-08 08:26:01 -0400 | [diff] [blame] | 946 | server = state->owner->so_server; |
| 947 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
| 948 | struct nfs_client *clp = server->nfs_client; |
| 949 | |
| 950 | clp->cl_mvops->free_lock_state(server, lsp); |
| 951 | } else |
Trond Myklebust | c8b2d0b | 2013-05-03 16:22:55 -0400 | [diff] [blame] | 952 | nfs4_free_lock_state(server, lsp); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 953 | } |
| 954 | |
| 955 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
| 956 | { |
| 957 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
| 958 | |
| 959 | dst->fl_u.nfs4_fl.owner = lsp; |
Elena Reshetova | 194bc1f | 2017-10-20 12:53:36 +0300 | [diff] [blame] | 960 | refcount_inc(&lsp->ls_count); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 961 | } |
| 962 | |
| 963 | static void nfs4_fl_release_lock(struct file_lock *fl) |
| 964 | { |
| 965 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
| 966 | } |
| 967 | |
Alexey Dobriyan | 6aed628 | 2009-09-21 17:01:11 -0700 | [diff] [blame] | 968 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 969 | .fl_copy_lock = nfs4_fl_copy_lock, |
| 970 | .fl_release_private = nfs4_fl_release_lock, |
| 971 | }; |
| 972 | |
| 973 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) |
| 974 | { |
| 975 | struct nfs4_lock_state *lsp; |
| 976 | |
| 977 | if (fl->fl_ops != NULL) |
| 978 | return 0; |
Jeff Layton | 8003d3c4 | 2014-05-01 06:28:45 -0400 | [diff] [blame] | 979 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 980 | if (lsp == NULL) |
| 981 | return -ENOMEM; |
| 982 | fl->fl_u.nfs4_fl.owner = lsp; |
| 983 | fl->fl_ops = &nfs4_fl_lock_ops; |
| 984 | return 0; |
| 985 | } |
| 986 | |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 987 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
| 988 | struct nfs4_state *state, |
NeilBrown | 1739347 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 989 | const struct nfs_lock_context *l_ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | { |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 991 | struct nfs4_lock_state *lsp; |
NeilBrown | 8d42443 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 992 | fl_owner_t fl_owner, fl_flock_owner; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 993 | int ret = -ENOENT; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 994 | |
NeilBrown | 1739347 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 995 | if (l_ctx == NULL) |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 996 | goto out; |
| 997 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 998 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
| 999 | goto out; |
| 1000 | |
NeilBrown | d51fdb8 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 1001 | fl_owner = l_ctx->lockowner; |
NeilBrown | 8d42443 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 1002 | fl_flock_owner = l_ctx->open_context->flock_owner; |
| 1003 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1004 | spin_lock(&state->state_lock); |
NeilBrown | 8d42443 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 1005 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_flock_owner); |
NeilBrown | ef1820f | 2013-09-04 17:04:49 +1000 | [diff] [blame] | 1006 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
| 1007 | ret = -EIO; |
| 1008 | 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] | 1009 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 1010 | ret = 0; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1011 | } |
| 1012 | spin_unlock(&state->state_lock); |
| 1013 | nfs4_put_lock_state(lsp); |
| 1014 | out: |
| 1015 | return ret; |
| 1016 | } |
| 1017 | |
Trond Myklebust | c82bac6 | 2017-11-06 15:28:06 -0500 | [diff] [blame] | 1018 | bool nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1019 | { |
Trond Myklebust | c82bac6 | 2017-11-06 15:28:06 -0500 | [diff] [blame] | 1020 | bool ret; |
Trond Myklebust | 92b40e9 | 2013-04-20 01:25:45 -0400 | [diff] [blame] | 1021 | const nfs4_stateid *src; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 1022 | int seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 1024 | do { |
Trond Myklebust | c82bac6 | 2017-11-06 15:28:06 -0500 | [diff] [blame] | 1025 | ret = false; |
Trond Myklebust | 92b40e9 | 2013-04-20 01:25:45 -0400 | [diff] [blame] | 1026 | src = &zero_stateid; |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 1027 | seq = read_seqbegin(&state->seqlock); |
Trond Myklebust | c82bac6 | 2017-11-06 15:28:06 -0500 | [diff] [blame] | 1028 | if (test_bit(NFS_OPEN_STATE, &state->flags)) { |
Trond Myklebust | 92b40e9 | 2013-04-20 01:25:45 -0400 | [diff] [blame] | 1029 | src = &state->open_stateid; |
Trond Myklebust | c82bac6 | 2017-11-06 15:28:06 -0500 | [diff] [blame] | 1030 | ret = true; |
| 1031 | } |
Trond Myklebust | 92b40e9 | 2013-04-20 01:25:45 -0400 | [diff] [blame] | 1032 | nfs4_stateid_copy(dst, src); |
Trond Myklebust | 8bda4e4 | 2007-07-09 10:45:42 -0400 | [diff] [blame] | 1033 | } while (read_seqretry(&state->seqlock, seq)); |
Trond Myklebust | c82bac6 | 2017-11-06 15:28:06 -0500 | [diff] [blame] | 1034 | return ret; |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1035 | } |
Trond Myklebust | 8d0a8a9 | 2005-06-22 17:16:32 +0000 | [diff] [blame] | 1036 | |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1037 | /* |
| 1038 | * Byte-range lock aware utility to initialize the stateid of read/write |
| 1039 | * requests. |
| 1040 | */ |
Trond Myklebust | abf4e13 | 2016-05-16 17:42:44 -0400 | [diff] [blame] | 1041 | int nfs4_select_rw_stateid(struct nfs4_state *state, |
NeilBrown | 1739347 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 1042 | fmode_t fmode, const struct nfs_lock_context *l_ctx, |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1043 | nfs4_stateid *dst, const struct cred **cred) |
Trond Myklebust | 4fc8796 | 2012-03-08 17:42:01 -0500 | [diff] [blame] | 1044 | { |
Trond Myklebust | abf4e13 | 2016-05-16 17:42:44 -0400 | [diff] [blame] | 1045 | int ret; |
| 1046 | |
Trond Myklebust | 7ebeb7f | 2016-09-22 13:39:20 -0400 | [diff] [blame] | 1047 | if (!nfs4_valid_open_stateid(state)) |
| 1048 | return -EIO; |
Trond Myklebust | abf4e13 | 2016-05-16 17:42:44 -0400 | [diff] [blame] | 1049 | if (cred != NULL) |
| 1050 | *cred = NULL; |
NeilBrown | 1739347 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 1051 | ret = nfs4_copy_lock_stateid(dst, state, l_ctx); |
NeilBrown | ef1820f | 2013-09-04 17:04:49 +1000 | [diff] [blame] | 1052 | if (ret == -EIO) |
| 1053 | /* A lost lock - don't even consider delegations */ |
| 1054 | goto out; |
Andy Adamson | 146d70c | 2014-02-18 10:36:05 -0500 | [diff] [blame] | 1055 | /* returns true if delegation stateid found and copied */ |
Trond Myklebust | abf4e13 | 2016-05-16 17:42:44 -0400 | [diff] [blame] | 1056 | if (nfs4_copy_delegation_stateid(state->inode, fmode, dst, cred)) { |
Andy Adamson | 146d70c | 2014-02-18 10:36:05 -0500 | [diff] [blame] | 1057 | ret = 0; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 1058 | goto out; |
Andy Adamson | 146d70c | 2014-02-18 10:36:05 -0500 | [diff] [blame] | 1059 | } |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 1060 | if (ret != -ENOENT) |
NeilBrown | ef1820f | 2013-09-04 17:04:49 +1000 | [diff] [blame] | 1061 | /* nfs4_copy_delegation_stateid() didn't over-write |
| 1062 | * dst, so it still has the lock stateid which we now |
| 1063 | * choose to use. |
| 1064 | */ |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 1065 | goto out; |
Trond Myklebust | d9aba2b | 2019-07-16 15:38:28 -0400 | [diff] [blame] | 1066 | ret = nfs4_copy_open_stateid(dst, state) ? 0 : -EAGAIN; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 1067 | out: |
Trond Myklebust | 3b66486 | 2013-03-17 15:31:15 -0400 | [diff] [blame] | 1068 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
| 1069 | dst->seqid = 0; |
Trond Myklebust | 5521abf | 2013-03-16 20:54:34 -0400 | [diff] [blame] | 1070 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | } |
| 1072 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1073 | 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] | 1074 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1075 | struct nfs_seqid *new; |
| 1076 | |
Trond Myklebust | 8535b2b | 2010-05-13 12:51:01 -0400 | [diff] [blame] | 1077 | new = kmalloc(sizeof(*new), gfp_mask); |
Trond Myklebust | badc76d | 2015-01-23 18:48:00 -0500 | [diff] [blame] | 1078 | if (new == NULL) |
| 1079 | return ERR_PTR(-ENOMEM); |
| 1080 | new->sequence = counter; |
| 1081 | INIT_LIST_HEAD(&new->list); |
| 1082 | new->task = NULL; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1083 | return new; |
| 1084 | } |
| 1085 | |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 1086 | void nfs_release_seqid(struct nfs_seqid *seqid) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1087 | { |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1088 | struct nfs_seqid_counter *sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1089 | |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1090 | if (seqid == NULL || list_empty(&seqid->list)) |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1091 | return; |
| 1092 | sequence = seqid->sequence; |
| 1093 | spin_lock(&sequence->lock); |
| 1094 | list_del_init(&seqid->list); |
| 1095 | if (!list_empty(&sequence->list)) { |
| 1096 | struct nfs_seqid *next; |
| 1097 | |
| 1098 | next = list_first_entry(&sequence->list, |
| 1099 | struct nfs_seqid, list); |
| 1100 | rpc_wake_up_queued_task(&sequence->wait, next->task); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1101 | } |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1102 | spin_unlock(&sequence->lock); |
Trond Myklebust | 72211db | 2009-12-15 14:47:36 -0500 | [diff] [blame] | 1103 | } |
| 1104 | |
| 1105 | void nfs_free_seqid(struct nfs_seqid *seqid) |
| 1106 | { |
| 1107 | nfs_release_seqid(seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1108 | kfree(seqid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | } |
| 1110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1112 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
| 1113 | * failed with a seqid incrementing error - |
Toralf Förster | 16a6ddc | 2013-12-12 19:09:00 +0100 | [diff] [blame] | 1114 | * see comments nfs4.h:seqid_mutating_error() |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1115 | */ |
Trond Myklebust | 88d9093 | 2007-07-02 14:03:03 -0400 | [diff] [blame] | 1116 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | { |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1118 | switch (status) { |
| 1119 | case 0: |
| 1120 | break; |
| 1121 | case -NFS4ERR_BAD_SEQID: |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 1122 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
| 1123 | return; |
Trond Myklebust | 9a3ba43 | 2012-03-12 18:01:48 -0400 | [diff] [blame] | 1124 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
Dan Muntz | 497799e | 2008-02-13 13:09:35 -0800 | [diff] [blame] | 1125 | " sequence-id error on an" |
| 1126 | " unconfirmed sequence %p!\n", |
Trond Myklebust | 6f43ddc | 2007-07-08 16:49:11 -0400 | [diff] [blame] | 1127 | seqid->sequence); |
Gustavo A. R. Silva | ffb8171 | 2020-11-20 12:26:46 -0600 | [diff] [blame] | 1128 | return; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1129 | case -NFS4ERR_STALE_CLIENTID: |
| 1130 | case -NFS4ERR_STALE_STATEID: |
| 1131 | case -NFS4ERR_BAD_STATEID: |
| 1132 | case -NFS4ERR_BADXDR: |
| 1133 | case -NFS4ERR_RESOURCE: |
| 1134 | case -NFS4ERR_NOFILEHANDLE: |
Chuck Lever | 406dab8 | 2017-01-26 15:14:52 -0500 | [diff] [blame] | 1135 | case -NFS4ERR_MOVED: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1136 | /* Non-seqid mutating errors */ |
| 1137 | return; |
zhengbin | 8b98a53 | 2019-12-19 18:34:47 +0800 | [diff] [blame] | 1138 | } |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1139 | /* |
| 1140 | * Note: no locking needed as we are guaranteed to be first |
| 1141 | * on the sequence list |
| 1142 | */ |
| 1143 | seqid->sequence->counter++; |
| 1144 | } |
| 1145 | |
| 1146 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) |
| 1147 | { |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1148 | struct nfs4_state_owner *sp; |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1149 | |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1150 | if (seqid == NULL) |
| 1151 | return; |
| 1152 | |
| 1153 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1154 | if (status == -NFS4ERR_BAD_SEQID) |
NeilBrown | 86cfb04 | 2016-12-19 11:48:23 +1100 | [diff] [blame] | 1155 | nfs4_reset_state_owner(sp); |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1156 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
Benny Halevy | 34dc1ad | 2009-04-01 09:22:52 -0400 | [diff] [blame] | 1157 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1158 | } |
| 1159 | |
| 1160 | /* |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1161 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
| 1162 | * failed with a seqid incrementing error - |
Toralf Förster | 16a6ddc | 2013-12-12 19:09:00 +0100 | [diff] [blame] | 1163 | * see comments nfs4.h:seqid_mutating_error() |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1164 | */ |
| 1165 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) |
| 1166 | { |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1167 | if (seqid != NULL) |
| 1168 | nfs_increment_seqid(status, seqid); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1169 | } |
| 1170 | |
| 1171 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) |
| 1172 | { |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1173 | struct nfs_seqid_counter *sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1174 | int status = 0; |
| 1175 | |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1176 | if (seqid == NULL) |
| 1177 | goto out; |
| 1178 | sequence = seqid->sequence; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1179 | spin_lock(&sequence->lock); |
Trond Myklebust | 4601df2 | 2012-01-20 18:47:05 -0500 | [diff] [blame] | 1180 | seqid->task = task; |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1181 | if (list_empty(&seqid->list)) |
| 1182 | list_add_tail(&seqid->list, &sequence->list); |
| 1183 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) |
| 1184 | goto unlock; |
Trond Myklebust | 5d00837 | 2008-02-22 16:34:17 -0500 | [diff] [blame] | 1185 | rpc_sleep_on(&sequence->wait, task, NULL); |
Trond Myklebust | 2f74c0a | 2008-01-08 17:56:07 -0500 | [diff] [blame] | 1186 | status = -EAGAIN; |
| 1187 | unlock: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1188 | spin_unlock(&sequence->lock); |
Trond Myklebust | a679641 | 2015-01-23 19:04:44 -0500 | [diff] [blame] | 1189 | out: |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1190 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | } |
| 1192 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1193 | static int nfs4_run_state_manager(void *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1195 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1196 | { |
Trond Myklebust | 43d20e8 | 2021-07-13 12:28:22 -0400 | [diff] [blame] | 1197 | clear_and_wake_up_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
Trond Myklebust | 433fbe4 | 2006-01-03 09:55:22 +0100 | [diff] [blame] | 1198 | rpc_wake_up(&clp->cl_rpcwaitq); |
| 1199 | } |
| 1200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | /* |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1202 | * Schedule the nfs_client asynchronous state management routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | */ |
Trond Myklebust | b0d3ded | 2008-12-23 15:21:50 -0500 | [diff] [blame] | 1204 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | { |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1206 | struct task_struct *task; |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1207 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | |
Trond Myklebust | aeabb3c | 2018-11-19 20:11:45 -0500 | [diff] [blame] | 1209 | set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1210 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
| 1211 | return; |
Trond Myklebust | 5043e90 | 2006-01-03 09:55:23 +0100 | [diff] [blame] | 1212 | __module_get(THIS_MODULE); |
Elena Reshetova | 212bf41 | 2017-10-20 12:53:38 +0300 | [diff] [blame] | 1213 | refcount_inc(&clp->cl_count); |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1214 | |
| 1215 | /* The rcu_read_lock() is not strictly necessary, as the state |
| 1216 | * manager is the only thread that ever changes the rpc_xprt |
| 1217 | * after it's initialized. At this point, we're single threaded. */ |
| 1218 | rcu_read_lock(); |
| 1219 | snprintf(buf, sizeof(buf), "%s-manager", |
| 1220 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
| 1221 | rcu_read_unlock(); |
Kees Cook | f170168 | 2013-07-03 15:04:58 -0700 | [diff] [blame] | 1222 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
Trond Myklebust | 2446ab6 | 2012-03-01 17:00:56 -0500 | [diff] [blame] | 1223 | if (IS_ERR(task)) { |
| 1224 | printk(KERN_ERR "%s: kthread_run: %ld\n", |
| 1225 | __func__, PTR_ERR(task)); |
| 1226 | nfs4_clear_state_manager_bit(clp); |
| 1227 | nfs_put_client(clp); |
| 1228 | module_put(THIS_MODULE); |
| 1229 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | } |
| 1231 | |
| 1232 | /* |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1233 | * Schedule a lease recovery attempt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | */ |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1235 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | { |
| 1237 | if (!clp) |
| 1238 | return; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1239 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1240 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1241 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
| 1242 | clp->cl_hostname); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 1243 | nfs4_schedule_state_manager(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | } |
Andy Adamson | 9cb8196 | 2012-03-07 10:49:41 -0500 | [diff] [blame] | 1245 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 1247 | /** |
| 1248 | * nfs4_schedule_migration_recovery - trigger migration recovery |
| 1249 | * |
| 1250 | * @server: FSID that is migrating |
| 1251 | * |
| 1252 | * Returns zero if recovery has started, otherwise a negative NFS4ERR |
| 1253 | * value is returned. |
| 1254 | */ |
| 1255 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) |
| 1256 | { |
| 1257 | struct nfs_client *clp = server->nfs_client; |
| 1258 | |
| 1259 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { |
| 1260 | pr_err("NFS: volatile file handles not supported (server %s)\n", |
| 1261 | clp->cl_hostname); |
| 1262 | return -NFS4ERR_IO; |
| 1263 | } |
| 1264 | |
| 1265 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) |
| 1266 | return -NFS4ERR_IO; |
| 1267 | |
| 1268 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", |
| 1269 | __func__, |
| 1270 | (unsigned long long)server->fsid.major, |
| 1271 | (unsigned long long)server->fsid.minor, |
| 1272 | clp->cl_hostname); |
| 1273 | |
| 1274 | set_bit(NFS_MIG_IN_TRANSITION, |
| 1275 | &((struct nfs_server *)server)->mig_status); |
| 1276 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); |
| 1277 | |
| 1278 | nfs4_schedule_state_manager(clp); |
| 1279 | return 0; |
| 1280 | } |
| 1281 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); |
| 1282 | |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 1283 | /** |
| 1284 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery |
| 1285 | * |
| 1286 | * @clp: server to check for moved leases |
| 1287 | * |
| 1288 | */ |
| 1289 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) |
| 1290 | { |
| 1291 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", |
| 1292 | __func__, clp->cl_clientid, clp->cl_hostname); |
| 1293 | |
| 1294 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); |
| 1295 | nfs4_schedule_state_manager(clp); |
| 1296 | } |
| 1297 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); |
| 1298 | |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1299 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
| 1300 | { |
| 1301 | int res; |
| 1302 | |
| 1303 | might_sleep(); |
| 1304 | |
Elena Reshetova | 212bf41 | 2017-10-20 12:53:38 +0300 | [diff] [blame] | 1305 | refcount_inc(&clp->cl_count); |
NeilBrown | 7431620 | 2014-07-07 15:16:04 +1000 | [diff] [blame] | 1306 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
| 1307 | nfs_wait_bit_killable, TASK_KILLABLE); |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1308 | if (res) |
Chuck Lever | 0625c2d | 2013-10-17 14:14:10 -0400 | [diff] [blame] | 1309 | goto out; |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1310 | if (clp->cl_cons_state < 0) |
Chuck Lever | 0625c2d | 2013-10-17 14:14:10 -0400 | [diff] [blame] | 1311 | res = clp->cl_cons_state; |
| 1312 | out: |
| 1313 | nfs_put_client(clp); |
| 1314 | return res; |
Trond Myklebust | 3302127 | 2012-11-26 13:13:29 -0500 | [diff] [blame] | 1315 | } |
| 1316 | |
| 1317 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) |
| 1318 | { |
| 1319 | unsigned int loop; |
| 1320 | int ret; |
| 1321 | |
| 1322 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
| 1323 | ret = nfs4_wait_clnt_recover(clp); |
| 1324 | if (ret != 0) |
| 1325 | break; |
| 1326 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
| 1327 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) |
| 1328 | break; |
| 1329 | nfs4_schedule_state_manager(clp); |
| 1330 | ret = -EIO; |
| 1331 | } |
| 1332 | return ret; |
| 1333 | } |
| 1334 | |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1335 | /* |
| 1336 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN |
| 1337 | * @clp: client to process |
| 1338 | * |
| 1339 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a |
| 1340 | * resend of the SETCLIENTID and hence re-establish the |
| 1341 | * callback channel. Then return all existing delegations. |
| 1342 | */ |
| 1343 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) |
| 1344 | { |
| 1345 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1346 | nfs_expire_all_delegations(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1347 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
| 1348 | clp->cl_hostname); |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1349 | } |
| 1350 | |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1351 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
| 1352 | { |
Trond Myklebust | ad1e396 | 2012-03-10 11:23:15 -0500 | [diff] [blame] | 1353 | nfs40_handle_cb_pathdown(clp); |
Trond Myklebust | 042b60b | 2011-08-24 15:07:37 -0400 | [diff] [blame] | 1354 | nfs4_schedule_state_manager(clp); |
| 1355 | } |
| 1356 | |
Trond Myklebust | f9feab1 | 2011-03-09 16:12:46 -0500 | [diff] [blame] | 1357 | 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] | 1358 | { |
| 1359 | |
Trond Myklebust | 7ebeb7f | 2016-09-22 13:39:20 -0400 | [diff] [blame] | 1360 | if (!nfs4_valid_open_stateid(state)) |
| 1361 | return 0; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1362 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1363 | /* Don't recover state that expired before the reboot */ |
| 1364 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { |
| 1365 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
| 1366 | return 0; |
| 1367 | } |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1368 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1369 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 1370 | return 1; |
| 1371 | } |
| 1372 | |
Trond Myklebust | 4f14c19 | 2014-02-12 19:15:06 -0500 | [diff] [blame] | 1373 | 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] | 1374 | { |
Trond Myklebust | 7ebeb7f | 2016-09-22 13:39:20 -0400 | [diff] [blame] | 1375 | if (!nfs4_valid_open_stateid(state)) |
| 1376 | return 0; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1377 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 1378 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1379 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1380 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
| 1381 | return 1; |
| 1382 | } |
| 1383 | |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1384 | 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] | 1385 | { |
| 1386 | struct nfs_client *clp = server->nfs_client; |
| 1387 | |
Trond Myklebust | 7ebeb7f | 2016-09-22 13:39:20 -0400 | [diff] [blame] | 1388 | if (!nfs4_state_mark_reclaim_nograce(clp, state)) |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1389 | return -EBADF; |
Trond Myklebust | 994b15b | 2018-09-05 14:07:14 -0400 | [diff] [blame] | 1390 | nfs_inode_find_delegation_state_and_recover(state->inode, |
| 1391 | &state->stateid); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1392 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
| 1393 | clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1394 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1395 | return 0; |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1396 | } |
Andy Adamson | 9cb8196 | 2012-03-07 10:49:41 -0500 | [diff] [blame] | 1397 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 1398 | |
Trond Myklebust | 6c2d8f8 | 2016-09-22 13:39:07 -0400 | [diff] [blame] | 1399 | static struct nfs4_lock_state * |
| 1400 | nfs_state_find_lock_state_by_stateid(struct nfs4_state *state, |
| 1401 | const nfs4_stateid *stateid) |
| 1402 | { |
| 1403 | struct nfs4_lock_state *pos; |
| 1404 | |
| 1405 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
| 1406 | if (!test_bit(NFS_LOCK_INITIALIZED, &pos->ls_flags)) |
| 1407 | continue; |
Trond Myklebust | 42c304c | 2019-10-26 10:16:15 -0400 | [diff] [blame] | 1408 | if (nfs4_stateid_match_or_older(&pos->ls_stateid, stateid)) |
Trond Myklebust | 6c2d8f8 | 2016-09-22 13:39:07 -0400 | [diff] [blame] | 1409 | return pos; |
| 1410 | } |
| 1411 | return NULL; |
| 1412 | } |
| 1413 | |
| 1414 | static bool nfs_state_lock_state_matches_stateid(struct nfs4_state *state, |
| 1415 | const nfs4_stateid *stateid) |
| 1416 | { |
| 1417 | bool found = false; |
| 1418 | |
| 1419 | if (test_bit(LK_STATE_IN_USE, &state->flags)) { |
| 1420 | spin_lock(&state->state_lock); |
| 1421 | if (nfs_state_find_lock_state_by_stateid(state, stateid)) |
| 1422 | found = true; |
| 1423 | spin_unlock(&state->state_lock); |
| 1424 | } |
| 1425 | return found; |
| 1426 | } |
| 1427 | |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1428 | void nfs_inode_find_state_and_recover(struct inode *inode, |
| 1429 | const nfs4_stateid *stateid) |
| 1430 | { |
| 1431 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; |
| 1432 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1433 | struct nfs_open_context *ctx; |
| 1434 | struct nfs4_state *state; |
| 1435 | bool found = false; |
| 1436 | |
Trond Myklebust | 0de4397 | 2018-09-02 15:57:01 -0400 | [diff] [blame] | 1437 | rcu_read_lock(); |
| 1438 | list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1439 | state = ctx->state; |
| 1440 | if (state == NULL) |
| 1441 | continue; |
Trond Myklebust | 42c304c | 2019-10-26 10:16:15 -0400 | [diff] [blame] | 1442 | if (nfs4_stateid_match_or_older(&state->stateid, stateid) && |
Trond Myklebust | 7ebeb7f | 2016-09-22 13:39:20 -0400 | [diff] [blame] | 1443 | nfs4_state_mark_reclaim_nograce(clp, state)) { |
Trond Myklebust | 6c2d8f8 | 2016-09-22 13:39:07 -0400 | [diff] [blame] | 1444 | found = true; |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1445 | continue; |
Trond Myklebust | 6c2d8f8 | 2016-09-22 13:39:07 -0400 | [diff] [blame] | 1446 | } |
Trond Myklebust | 42c304c | 2019-10-26 10:16:15 -0400 | [diff] [blame] | 1447 | if (test_bit(NFS_OPEN_STATE, &state->flags) && |
| 1448 | nfs4_stateid_match_or_older(&state->open_stateid, stateid) && |
Trond Myklebust | 46280d9 | 2017-11-06 15:28:11 -0500 | [diff] [blame] | 1449 | nfs4_state_mark_reclaim_nograce(clp, state)) { |
| 1450 | found = true; |
| 1451 | continue; |
| 1452 | } |
Trond Myklebust | 7ebeb7f | 2016-09-22 13:39:20 -0400 | [diff] [blame] | 1453 | if (nfs_state_lock_state_matches_stateid(state, stateid) && |
| 1454 | nfs4_state_mark_reclaim_nograce(clp, state)) |
Trond Myklebust | 6c2d8f8 | 2016-09-22 13:39:07 -0400 | [diff] [blame] | 1455 | found = true; |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1456 | } |
Trond Myklebust | 0de4397 | 2018-09-02 15:57:01 -0400 | [diff] [blame] | 1457 | rcu_read_unlock(); |
Trond Myklebust | 6c2d8f8 | 2016-09-22 13:39:07 -0400 | [diff] [blame] | 1458 | |
| 1459 | nfs_inode_find_delegation_state_and_recover(inode, stateid); |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1460 | if (found) |
| 1461 | nfs4_schedule_state_manager(clp); |
| 1462 | } |
| 1463 | |
Trond Myklebust | 86dbd08b | 2019-07-22 09:44:04 +0100 | [diff] [blame] | 1464 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state, int err) |
Trond Myklebust | c58c844 | 2013-03-18 19:45:14 -0400 | [diff] [blame] | 1465 | { |
| 1466 | struct inode *inode = state->inode; |
| 1467 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1468 | struct nfs_open_context *ctx; |
| 1469 | |
Trond Myklebust | 0de4397 | 2018-09-02 15:57:01 -0400 | [diff] [blame] | 1470 | rcu_read_lock(); |
| 1471 | list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { |
Trond Myklebust | c58c844 | 2013-03-18 19:45:14 -0400 | [diff] [blame] | 1472 | if (ctx->state != state) |
| 1473 | continue; |
| 1474 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); |
Trond Myklebust | 86dbd08b | 2019-07-22 09:44:04 +0100 | [diff] [blame] | 1475 | pr_warn("NFSv4: state recovery failed for open file %pd2, " |
| 1476 | "error = %d\n", ctx->dentry, err); |
Trond Myklebust | c58c844 | 2013-03-18 19:45:14 -0400 | [diff] [blame] | 1477 | } |
Trond Myklebust | 0de4397 | 2018-09-02 15:57:01 -0400 | [diff] [blame] | 1478 | rcu_read_unlock(); |
Trond Myklebust | c58c844 | 2013-03-18 19:45:14 -0400 | [diff] [blame] | 1479 | } |
| 1480 | |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1481 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
| 1482 | { |
| 1483 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); |
Trond Myklebust | 86dbd08b | 2019-07-22 09:44:04 +0100 | [diff] [blame] | 1484 | nfs4_state_mark_open_context_bad(state, error); |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1485 | } |
| 1486 | |
Trond Myklebust | a1d0b5e | 2012-03-05 19:56:44 -0500 | [diff] [blame] | 1487 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1488 | 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] | 1489 | { |
| 1490 | struct inode *inode = state->inode; |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1491 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | struct file_lock *fl; |
NeilBrown | dce2630 | 2017-12-13 09:57:09 +1100 | [diff] [blame] | 1493 | struct nfs4_lock_state *lsp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | int status = 0; |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1495 | struct file_lock_context *flctx = inode->i_flctx; |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1496 | struct list_head *list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1498 | if (flctx == NULL) |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1499 | return 0; |
| 1500 | |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1501 | list = &flctx->flc_posix; |
| 1502 | |
Trond Myklebust | 3f09df7 | 2009-06-17 13:23:00 -0700 | [diff] [blame] | 1503 | /* Guard against delegation returns and new lock/unlock calls */ |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1504 | down_write(&nfsi->rwsem); |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1505 | spin_lock(&flctx->flc_lock); |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1506 | restart: |
| 1507 | list_for_each_entry(fl, list, fl_list) { |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1508 | if (nfs_file_open_context(fl->fl_file)->state != state) |
| 1509 | continue; |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1510 | spin_unlock(&flctx->flc_lock); |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1511 | status = ops->recover_lock(state, fl); |
| 1512 | switch (status) { |
| 1513 | case 0: |
| 1514 | break; |
Trond Myklebust | 67e7b52 | 2019-08-07 07:31:27 -0400 | [diff] [blame] | 1515 | case -ETIMEDOUT: |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1516 | case -ESTALE: |
| 1517 | case -NFS4ERR_ADMIN_REVOKED: |
| 1518 | case -NFS4ERR_STALE_STATEID: |
| 1519 | case -NFS4ERR_BAD_STATEID: |
| 1520 | case -NFS4ERR_EXPIRED: |
| 1521 | case -NFS4ERR_NO_GRACE: |
| 1522 | case -NFS4ERR_STALE_CLIENTID: |
| 1523 | case -NFS4ERR_BADSESSION: |
| 1524 | case -NFS4ERR_BADSLOT: |
| 1525 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1526 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1527 | goto out; |
| 1528 | default: |
| 1529 | pr_err("NFS: %s: unhandled error %d\n", |
| 1530 | __func__, status); |
Gustavo A. R. Silva | df561f66 | 2020-08-23 17:36:59 -0500 | [diff] [blame] | 1531 | fallthrough; |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1532 | case -ENOMEM: |
| 1533 | case -NFS4ERR_DENIED: |
| 1534 | case -NFS4ERR_RECLAIM_BAD: |
| 1535 | case -NFS4ERR_RECLAIM_CONFLICT: |
NeilBrown | dce2630 | 2017-12-13 09:57:09 +1100 | [diff] [blame] | 1536 | lsp = fl->fl_u.nfs4_fl.owner; |
| 1537 | if (lsp) |
| 1538 | set_bit(NFS_LOCK_LOST, &lsp->ls_flags); |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1539 | status = 0; |
| 1540 | } |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1541 | spin_lock(&flctx->flc_lock); |
Jeff Layton | 5263e31 | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1542 | } |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 1543 | if (list == &flctx->flc_posix) { |
| 1544 | list = &flctx->flc_flock; |
| 1545 | goto restart; |
| 1546 | } |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 1547 | spin_unlock(&flctx->flc_lock); |
Trond Myklebust | 965b5d6 | 2009-06-17 13:22:59 -0700 | [diff] [blame] | 1548 | out: |
Trond Myklebust | 19e03c5 | 2008-12-23 15:21:44 -0500 | [diff] [blame] | 1549 | up_write(&nfsi->rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | return status; |
| 1551 | } |
| 1552 | |
Anna Schumaker | 80f4236 | 2018-09-20 16:12:13 -0400 | [diff] [blame] | 1553 | #ifdef CONFIG_NFS_V4_2 |
| 1554 | static void nfs42_complete_copies(struct nfs4_state_owner *sp, struct nfs4_state *state) |
| 1555 | { |
| 1556 | struct nfs4_copy_state *copy; |
| 1557 | |
Olga Kornievskaia | 0e65a32 | 2019-06-14 14:38:40 -0400 | [diff] [blame] | 1558 | if (!test_bit(NFS_CLNT_DST_SSC_COPY_STATE, &state->flags) && |
| 1559 | !test_bit(NFS_CLNT_SRC_SSC_COPY_STATE, &state->flags)) |
Anna Schumaker | 80f4236 | 2018-09-20 16:12:13 -0400 | [diff] [blame] | 1560 | return; |
| 1561 | |
| 1562 | spin_lock(&sp->so_server->nfs_client->cl_lock); |
| 1563 | list_for_each_entry(copy, &sp->so_server->ss_copies, copies) { |
Olga Kornievskaia | 0e65a32 | 2019-06-14 14:38:40 -0400 | [diff] [blame] | 1564 | if ((test_bit(NFS_CLNT_DST_SSC_COPY_STATE, &state->flags) && |
| 1565 | !nfs4_stateid_match_other(&state->stateid, |
| 1566 | ©->parent_dst_state->stateid))) |
| 1567 | continue; |
Anna Schumaker | 80f4236 | 2018-09-20 16:12:13 -0400 | [diff] [blame] | 1568 | copy->flags = 1; |
Olga Kornievskaia | 0e65a32 | 2019-06-14 14:38:40 -0400 | [diff] [blame] | 1569 | if (test_and_clear_bit(NFS_CLNT_DST_SSC_COPY_STATE, |
| 1570 | &state->flags)) { |
| 1571 | clear_bit(NFS_CLNT_SRC_SSC_COPY_STATE, &state->flags); |
| 1572 | complete(©->completion); |
| 1573 | } |
| 1574 | } |
| 1575 | list_for_each_entry(copy, &sp->so_server->ss_copies, src_copies) { |
| 1576 | if ((test_bit(NFS_CLNT_SRC_SSC_COPY_STATE, &state->flags) && |
| 1577 | !nfs4_stateid_match_other(&state->stateid, |
| 1578 | ©->parent_src_state->stateid))) |
| 1579 | continue; |
| 1580 | copy->flags = 1; |
| 1581 | if (test_and_clear_bit(NFS_CLNT_DST_SSC_COPY_STATE, |
| 1582 | &state->flags)) |
| 1583 | complete(©->completion); |
Anna Schumaker | 80f4236 | 2018-09-20 16:12:13 -0400 | [diff] [blame] | 1584 | } |
| 1585 | spin_unlock(&sp->so_server->nfs_client->cl_lock); |
| 1586 | } |
| 1587 | #else /* !CONFIG_NFS_V4_2 */ |
| 1588 | static inline void nfs42_complete_copies(struct nfs4_state_owner *sp, |
| 1589 | struct nfs4_state *state) |
| 1590 | { |
| 1591 | } |
| 1592 | #endif /* CONFIG_NFS_V4_2 */ |
| 1593 | |
Anna Schumaker | cb7a838 | 2018-09-11 16:23:46 -0400 | [diff] [blame] | 1594 | static int __nfs4_reclaim_open_state(struct nfs4_state_owner *sp, struct nfs4_state *state, |
| 1595 | const struct nfs4_state_recovery_ops *ops) |
| 1596 | { |
| 1597 | struct nfs4_lock_state *lock; |
| 1598 | int status; |
| 1599 | |
| 1600 | status = ops->recover_open(sp, state); |
| 1601 | if (status < 0) |
| 1602 | return status; |
| 1603 | |
| 1604 | status = nfs4_reclaim_locks(state, ops); |
| 1605 | if (status < 0) |
| 1606 | return status; |
| 1607 | |
| 1608 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
| 1609 | spin_lock(&state->state_lock); |
| 1610 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Chuck Lever | 21f86d2 | 2019-11-05 11:04:13 -0500 | [diff] [blame] | 1611 | trace_nfs4_state_lock_reclaim(state, lock); |
Anna Schumaker | cb7a838 | 2018-09-11 16:23:46 -0400 | [diff] [blame] | 1612 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
| 1613 | pr_warn_ratelimited("NFS: %s: Lock reclaim failed!\n", __func__); |
| 1614 | } |
| 1615 | spin_unlock(&state->state_lock); |
| 1616 | } |
| 1617 | |
Anna Schumaker | 80f4236 | 2018-09-20 16:12:13 -0400 | [diff] [blame] | 1618 | nfs42_complete_copies(sp, state); |
Anna Schumaker | cb7a838 | 2018-09-11 16:23:46 -0400 | [diff] [blame] | 1619 | clear_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
| 1620 | return status; |
| 1621 | } |
| 1622 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1623 | 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] | 1624 | { |
| 1625 | struct nfs4_state *state; |
Trond Myklebust | c34fae0 | 2019-07-22 09:54:29 +0100 | [diff] [blame] | 1626 | unsigned int loop = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | int status = 0; |
Olga Kornievskaia | 0b9018b | 2019-10-08 16:34:36 -0400 | [diff] [blame] | 1628 | #ifdef CONFIG_NFS_V4_2 |
| 1629 | bool found_ssc_copy_state = false; |
| 1630 | #endif /* CONFIG_NFS_V4_2 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | |
| 1632 | /* Note: we rely on the sp->so_states list being ordered |
| 1633 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) |
| 1634 | * states first. |
| 1635 | * This is needed to ensure that the server won't give us any |
| 1636 | * read delegations that we have to return if, say, we are |
| 1637 | * recovering after a network partition or a reboot from a |
| 1638 | * server that doesn't support a grace period. |
| 1639 | */ |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1640 | spin_lock(&sp->so_lock); |
Trond Myklebust | abbec2da | 2014-06-05 10:42:37 -0400 | [diff] [blame] | 1641 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1642 | restart: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1644 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
| 1645 | continue; |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 1646 | if (!nfs4_valid_open_stateid(state)) |
| 1647 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | if (state->state == 0) |
| 1649 | continue; |
Olga Kornievskaia | 0b9018b | 2019-10-08 16:34:36 -0400 | [diff] [blame] | 1650 | #ifdef CONFIG_NFS_V4_2 |
| 1651 | if (test_bit(NFS_SRV_SSC_COPY_STATE, &state->flags)) { |
| 1652 | nfs4_state_mark_recovery_failed(state, -EIO); |
| 1653 | found_ssc_copy_state = true; |
| 1654 | continue; |
| 1655 | } |
| 1656 | #endif /* CONFIG_NFS_V4_2 */ |
Trond Myklebust | ace9fad | 2018-09-02 19:19:07 -0400 | [diff] [blame] | 1657 | refcount_inc(&state->count); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1658 | spin_unlock(&sp->so_lock); |
Anna Schumaker | cb7a838 | 2018-09-11 16:23:46 -0400 | [diff] [blame] | 1659 | status = __nfs4_reclaim_open_state(sp, state, ops); |
Anna Schumaker | cb7a838 | 2018-09-11 16:23:46 -0400 | [diff] [blame] | 1660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | switch (status) { |
Anna Schumaker | 35a6160 | 2018-09-11 16:23:47 -0400 | [diff] [blame] | 1662 | default: |
Trond Myklebust | c34fae0 | 2019-07-22 09:54:29 +0100 | [diff] [blame] | 1663 | if (status >= 0) { |
| 1664 | loop = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | break; |
Trond Myklebust | c34fae0 | 2019-07-22 09:54:29 +0100 | [diff] [blame] | 1666 | } |
Anna Schumaker | 35a6160 | 2018-09-11 16:23:47 -0400 | [diff] [blame] | 1667 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", __func__, status); |
Gustavo A. R. Silva | df561f66 | 2020-08-23 17:36:59 -0500 | [diff] [blame] | 1668 | fallthrough; |
Anna Schumaker | 35a6160 | 2018-09-11 16:23:47 -0400 | [diff] [blame] | 1669 | case -ENOENT: |
| 1670 | case -ENOMEM: |
| 1671 | case -EACCES: |
| 1672 | case -EROFS: |
| 1673 | case -EIO: |
| 1674 | case -ESTALE: |
| 1675 | /* Open state on this file cannot be recovered */ |
| 1676 | nfs4_state_mark_recovery_failed(state, status); |
| 1677 | break; |
| 1678 | case -EAGAIN: |
| 1679 | ssleep(1); |
Trond Myklebust | c34fae0 | 2019-07-22 09:54:29 +0100 | [diff] [blame] | 1680 | if (loop++ < 10) { |
| 1681 | set_bit(ops->state_flag_bit, &state->flags); |
| 1682 | break; |
| 1683 | } |
Gustavo A. R. Silva | df561f66 | 2020-08-23 17:36:59 -0500 | [diff] [blame] | 1684 | fallthrough; |
Anna Schumaker | 35a6160 | 2018-09-11 16:23:47 -0400 | [diff] [blame] | 1685 | case -NFS4ERR_ADMIN_REVOKED: |
| 1686 | case -NFS4ERR_STALE_STATEID: |
| 1687 | case -NFS4ERR_OLD_STATEID: |
| 1688 | case -NFS4ERR_BAD_STATEID: |
| 1689 | case -NFS4ERR_RECLAIM_BAD: |
| 1690 | case -NFS4ERR_RECLAIM_CONFLICT: |
| 1691 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
| 1692 | break; |
| 1693 | case -NFS4ERR_EXPIRED: |
| 1694 | case -NFS4ERR_NO_GRACE: |
| 1695 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
Gustavo A. R. Silva | df561f66 | 2020-08-23 17:36:59 -0500 | [diff] [blame] | 1696 | fallthrough; |
Anna Schumaker | 35a6160 | 2018-09-11 16:23:47 -0400 | [diff] [blame] | 1697 | case -NFS4ERR_STALE_CLIENTID: |
| 1698 | case -NFS4ERR_BADSESSION: |
| 1699 | case -NFS4ERR_BADSLOT: |
| 1700 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1701 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
Trond Myklebust | 67e7b52 | 2019-08-07 07:31:27 -0400 | [diff] [blame] | 1702 | case -ETIMEDOUT: |
Anna Schumaker | 35a6160 | 2018-09-11 16:23:47 -0400 | [diff] [blame] | 1703 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | } |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1705 | nfs4_put_open_state(state); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1706 | spin_lock(&sp->so_lock); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1707 | goto restart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | } |
Trond Myklebust | abbec2da | 2014-06-05 10:42:37 -0400 | [diff] [blame] | 1709 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1710 | spin_unlock(&sp->so_lock); |
Olga Kornievskaia | 0b9018b | 2019-10-08 16:34:36 -0400 | [diff] [blame] | 1711 | #ifdef CONFIG_NFS_V4_2 |
| 1712 | if (found_ssc_copy_state) |
| 1713 | return -EIO; |
| 1714 | #endif /* CONFIG_NFS_V4_2 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | return 0; |
| 1716 | out_err: |
Trond Myklebust | fe1d819 | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1717 | nfs4_put_open_state(state); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1718 | spin_lock(&sp->so_lock); |
Trond Myklebust | abbec2da | 2014-06-05 10:42:37 -0400 | [diff] [blame] | 1719 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
Trond Myklebust | c137afa | 2013-02-07 14:41:11 -0500 | [diff] [blame] | 1720 | spin_unlock(&sp->so_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | return status; |
| 1722 | } |
| 1723 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1724 | static void nfs4_clear_open_state(struct nfs4_state *state) |
| 1725 | { |
| 1726 | struct nfs4_lock_state *lock; |
| 1727 | |
| 1728 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
| 1729 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
| 1730 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
| 1731 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1732 | spin_lock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1733 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1734 | lock->ls_seqid.flags = 0; |
Trond Myklebust | 795a88c | 2012-09-10 13:26:49 -0400 | [diff] [blame] | 1735 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1736 | } |
Trond Myklebust | 4b44b40 | 2011-12-09 16:31:52 -0500 | [diff] [blame] | 1737 | spin_unlock(&state->state_lock); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1738 | } |
| 1739 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1740 | static void nfs4_reset_seqids(struct nfs_server *server, |
| 1741 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1742 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1743 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1744 | struct nfs4_state_owner *sp; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1745 | struct rb_node *pos; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1746 | struct nfs4_state *state; |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1747 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1748 | spin_lock(&clp->cl_lock); |
| 1749 | for (pos = rb_first(&server->state_owners); |
| 1750 | pos != NULL; |
| 1751 | pos = rb_next(pos)) { |
| 1752 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1753 | sp->so_seqid.flags = 0; |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1754 | spin_lock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1755 | list_for_each_entry(state, &sp->so_states, open_states) { |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1756 | if (mark_reclaim(clp, state)) |
| 1757 | nfs4_clear_open_state(state); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1758 | } |
Trond Myklebust | ec07342 | 2005-10-20 14:22:47 -0700 | [diff] [blame] | 1759 | spin_unlock(&sp->so_lock); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1760 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1761 | spin_unlock(&clp->cl_lock); |
| 1762 | } |
| 1763 | |
| 1764 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, |
| 1765 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) |
| 1766 | { |
| 1767 | struct nfs_server *server; |
| 1768 | |
| 1769 | rcu_read_lock(); |
| 1770 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1771 | nfs4_reset_seqids(server, mark_reclaim); |
| 1772 | rcu_read_unlock(); |
Trond Myklebust | cee54fc | 2005-10-18 14:20:12 -0700 | [diff] [blame] | 1773 | } |
| 1774 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1775 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
| 1776 | { |
| 1777 | /* Mark all delegations for reclaim */ |
| 1778 | nfs_delegation_mark_reclaim(clp); |
| 1779 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); |
| 1780 | } |
| 1781 | |
Trond Myklebust | 0048fdd | 2017-05-04 13:44:04 -0400 | [diff] [blame] | 1782 | static int nfs4_reclaim_complete(struct nfs_client *clp, |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1783 | const struct nfs4_state_recovery_ops *ops, |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1784 | const struct cred *cred) |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1785 | { |
| 1786 | /* Notify the server we're done reclaiming our state */ |
| 1787 | if (ops->reclaim_complete) |
Trond Myklebust | 0048fdd | 2017-05-04 13:44:04 -0400 | [diff] [blame] | 1788 | return ops->reclaim_complete(clp, cred); |
| 1789 | return 0; |
Ricardo Labiaga | fce5c83 | 2009-12-05 16:08:41 -0500 | [diff] [blame] | 1790 | } |
| 1791 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1792 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1793 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1794 | struct nfs_client *clp = server->nfs_client; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1795 | struct nfs4_state_owner *sp; |
| 1796 | struct rb_node *pos; |
| 1797 | struct nfs4_state *state; |
| 1798 | |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1799 | spin_lock(&clp->cl_lock); |
| 1800 | for (pos = rb_first(&server->state_owners); |
| 1801 | pos != NULL; |
| 1802 | pos = rb_next(pos)) { |
| 1803 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1804 | spin_lock(&sp->so_lock); |
| 1805 | list_for_each_entry(state, &sp->so_states, open_states) { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1806 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
| 1807 | &state->flags)) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1808 | continue; |
| 1809 | nfs4_state_mark_reclaim_nograce(clp, state); |
| 1810 | } |
| 1811 | spin_unlock(&sp->so_lock); |
| 1812 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1813 | spin_unlock(&clp->cl_lock); |
| 1814 | } |
| 1815 | |
| 1816 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
| 1817 | { |
| 1818 | struct nfs_server *server; |
| 1819 | |
| 1820 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
| 1821 | return 0; |
| 1822 | |
| 1823 | rcu_read_lock(); |
| 1824 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) |
| 1825 | nfs4_clear_reclaim_server(server); |
| 1826 | rcu_read_unlock(); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1827 | |
| 1828 | nfs_delegation_reap_unclaimed(clp); |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1829 | return 1; |
| 1830 | } |
| 1831 | |
| 1832 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
| 1833 | { |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1834 | const struct nfs4_state_recovery_ops *ops; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1835 | const struct cred *cred; |
Trond Myklebust | 0048fdd | 2017-05-04 13:44:04 -0400 | [diff] [blame] | 1836 | int err; |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1837 | |
Trond Myklebust | 6eaa614 | 2010-10-04 17:59:08 -0400 | [diff] [blame] | 1838 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
| 1839 | return; |
Trond Myklebust | 965e9c2 | 2013-05-20 11:05:17 -0400 | [diff] [blame] | 1840 | ops = clp->cl_mvops->reboot_recovery_ops; |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 1841 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 0048fdd | 2017-05-04 13:44:04 -0400 | [diff] [blame] | 1842 | err = nfs4_reclaim_complete(clp, ops, cred); |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1843 | put_cred(cred); |
Trond Myklebust | 0048fdd | 2017-05-04 13:44:04 -0400 | [diff] [blame] | 1844 | if (err == -NFS4ERR_CONN_NOT_BOUND_TO_SESSION) |
| 1845 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1846 | } |
| 1847 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1848 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
| 1849 | { |
Trond Myklebust | 45870d6 | 2016-09-22 13:38:59 -0400 | [diff] [blame] | 1850 | nfs_mark_test_expired_all_delegations(clp); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 1851 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
| 1852 | } |
| 1853 | |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1854 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1855 | { |
| 1856 | switch (error) { |
Anna Schumaker | 000d3f9 | 2018-09-11 16:23:48 -0400 | [diff] [blame] | 1857 | case 0: |
| 1858 | break; |
| 1859 | case -NFS4ERR_CB_PATH_DOWN: |
| 1860 | nfs40_handle_cb_pathdown(clp); |
| 1861 | break; |
| 1862 | case -NFS4ERR_NO_GRACE: |
| 1863 | nfs4_state_end_reclaim_reboot(clp); |
| 1864 | break; |
| 1865 | case -NFS4ERR_STALE_CLIENTID: |
| 1866 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1867 | nfs4_state_start_reclaim_reboot(clp); |
| 1868 | break; |
| 1869 | case -NFS4ERR_EXPIRED: |
| 1870 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 1871 | nfs4_state_start_reclaim_nograce(clp); |
| 1872 | break; |
| 1873 | case -NFS4ERR_BADSESSION: |
| 1874 | case -NFS4ERR_BADSLOT: |
| 1875 | case -NFS4ERR_BAD_HIGH_SLOT: |
| 1876 | case -NFS4ERR_DEADSESSION: |
| 1877 | case -NFS4ERR_SEQ_FALSE_RETRY: |
| 1878 | case -NFS4ERR_SEQ_MISORDERED: |
| 1879 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 1880 | /* Zero session reset errors */ |
| 1881 | break; |
| 1882 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 1883 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 1884 | break; |
| 1885 | default: |
| 1886 | dprintk("%s: failed to handle error %d for server %s\n", |
| 1887 | __func__, error, clp->cl_hostname); |
| 1888 | return error; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1889 | } |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1890 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
| 1891 | clp->cl_hostname); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1892 | return 0; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1893 | } |
| 1894 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1895 | 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] | 1896 | { |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1897 | struct nfs4_state_owner *sp; |
| 1898 | struct nfs_server *server; |
Trond Myklebust | 9f958ab | 2007-07-02 13:58:33 -0400 | [diff] [blame] | 1899 | struct rb_node *pos; |
Trond Myklebust | c77e228 | 2019-08-03 10:11:27 -0400 | [diff] [blame] | 1900 | LIST_HEAD(freeme); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | int status = 0; |
| 1902 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1903 | restart: |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1904 | rcu_read_lock(); |
| 1905 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
Trond Myklebust | c77e228 | 2019-08-03 10:11:27 -0400 | [diff] [blame] | 1906 | nfs4_purge_state_owners(server, &freeme); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1907 | spin_lock(&clp->cl_lock); |
| 1908 | for (pos = rb_first(&server->state_owners); |
| 1909 | pos != NULL; |
| 1910 | pos = rb_next(pos)) { |
| 1911 | sp = rb_entry(pos, |
| 1912 | struct nfs4_state_owner, so_server_node); |
| 1913 | if (!test_and_clear_bit(ops->owner_flag_bit, |
| 1914 | &sp->so_flags)) |
| 1915 | continue; |
Trond Myklebust | 4a0954e | 2015-10-02 11:11:16 -0400 | [diff] [blame] | 1916 | if (!atomic_inc_not_zero(&sp->so_count)) |
| 1917 | continue; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1918 | spin_unlock(&clp->cl_lock); |
| 1919 | rcu_read_unlock(); |
| 1920 | |
| 1921 | status = nfs4_reclaim_open_state(sp, ops); |
| 1922 | if (status < 0) { |
| 1923 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
| 1924 | nfs4_put_state_owner(sp); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 1925 | status = nfs4_recovery_handle_error(clp, status); |
| 1926 | return (status != 0) ? status : -EAGAIN; |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1927 | } |
| 1928 | |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1929 | nfs4_put_state_owner(sp); |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1930 | goto restart; |
Trond Myklebust | 7eff03a | 2008-12-23 15:21:43 -0500 | [diff] [blame] | 1931 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1932 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1933 | } |
Chuck Lever | 24d292b | 2010-12-24 01:32:43 +0000 | [diff] [blame] | 1934 | rcu_read_unlock(); |
Trond Myklebust | c77e228 | 2019-08-03 10:11:27 -0400 | [diff] [blame] | 1935 | nfs4_free_state_owners(&freeme); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 1936 | return 0; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1937 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1939 | static int nfs4_check_lease(struct nfs_client *clp) |
| 1940 | { |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1941 | const struct cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 1942 | const struct nfs4_state_maintenance_ops *ops = |
| 1943 | clp->cl_mvops->state_renewal_ops; |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1944 | int status; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1945 | |
Trond Myklebust | 0f605b56 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1946 | /* Is the client already known to have an expired lease? */ |
| 1947 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 1948 | return 0; |
NeilBrown | f15e1e8 | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 1949 | cred = ops->get_state_renewal_cred(clp); |
Trond Myklebust | 0f605b56 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1950 | if (cred == NULL) { |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 1951 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 4f38e4a | 2011-12-01 16:31:34 -0500 | [diff] [blame] | 1952 | status = -ENOKEY; |
Trond Myklebust | 0f605b56 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1953 | if (cred == NULL) |
| 1954 | goto out; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1955 | } |
Benny Halevy | 8e69514f | 2009-04-01 09:22:45 -0400 | [diff] [blame] | 1956 | status = ops->renew_lease(clp, cred); |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 1957 | put_cred(cred); |
Trond Myklebust | bc7a05c | 2013-04-08 17:50:28 -0400 | [diff] [blame] | 1958 | if (status == -ETIMEDOUT) { |
| 1959 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 1960 | return 0; |
| 1961 | } |
Trond Myklebust | 0f605b56 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 1962 | out: |
Trond Myklebust | 4f7cdf1 | 2009-12-03 15:53:20 -0500 | [diff] [blame] | 1963 | return nfs4_recovery_handle_error(clp, status); |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 1964 | } |
| 1965 | |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1966 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
| 1967 | * and for recoverable errors on EXCHANGE_ID for v4.1 |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1968 | */ |
| 1969 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) |
| 1970 | { |
| 1971 | switch (status) { |
Trond Myklebust | 89a2173 | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1972 | case -NFS4ERR_SEQ_MISORDERED: |
| 1973 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) |
| 1974 | return -ESERVERFAULT; |
| 1975 | /* Lease confirmation error: retry after purging the lease */ |
| 1976 | ssleep(1); |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1977 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 1978 | break; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1979 | case -NFS4ERR_STALE_CLIENTID: |
| 1980 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Andy Adamson | 47b803c | 2012-10-01 20:42:32 -0400 | [diff] [blame] | 1981 | nfs4_state_start_reclaim_reboot(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1982 | break; |
Chuck Lever | de73483 | 2012-07-11 16:30:50 -0400 | [diff] [blame] | 1983 | case -NFS4ERR_CLID_INUSE: |
| 1984 | pr_err("NFS: Server %s reports our clientid is in use\n", |
| 1985 | clp->cl_hostname); |
| 1986 | nfs_mark_client_ready(clp, -EPERM); |
| 1987 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
| 1988 | return -EPERM; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1989 | case -EACCES: |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1990 | case -NFS4ERR_DELAY: |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 1991 | case -EAGAIN: |
| 1992 | ssleep(1); |
| 1993 | break; |
| 1994 | |
| 1995 | case -NFS4ERR_MINOR_VERS_MISMATCH: |
| 1996 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) |
| 1997 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 1998 | dprintk("%s: exit with error %d for server %s\n", |
| 1999 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2000 | return -EPROTONOSUPPORT; |
Olga Kornievskaia | ea027cb | 2021-11-15 16:30:40 -0500 | [diff] [blame] | 2001 | case -ENOSPC: |
| 2002 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) |
| 2003 | nfs_mark_client_ready(clp, -EIO); |
| 2004 | return -EIO; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2005 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 2006 | * in nfs4_exchange_id */ |
| 2007 | default: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2008 | dprintk("%s: exit with error %d for server %s\n", __func__, |
| 2009 | status, clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2010 | return status; |
| 2011 | } |
| 2012 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2013 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
| 2014 | clp->cl_hostname); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2015 | return 0; |
| 2016 | } |
| 2017 | |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2018 | static int nfs4_establish_lease(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2019 | { |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2020 | const struct cred *cred; |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 2021 | const struct nfs4_state_recovery_ops *ops = |
| 2022 | clp->cl_mvops->reboot_recovery_ops; |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2023 | int status; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2024 | |
Trond Myklebust | 8aafd2f | 2018-08-11 11:52:38 -0400 | [diff] [blame] | 2025 | status = nfs4_begin_drain_session(clp); |
| 2026 | if (status != 0) |
| 2027 | return status; |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 2028 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2029 | if (cred == NULL) |
| 2030 | return -ENOENT; |
| 2031 | status = ops->establish_clid(clp, cred); |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2032 | put_cred(cred); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2033 | if (status != 0) |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2034 | return status; |
| 2035 | pnfs_destroy_all_layouts(clp); |
| 2036 | return 0; |
| 2037 | } |
| 2038 | |
Chuck Lever | 6bbb4ae8 | 2012-07-11 16:30:59 -0400 | [diff] [blame] | 2039 | /* |
| 2040 | * Returns zero or a negative errno. NFS4ERR values are converted |
| 2041 | * to local errno values. |
| 2042 | */ |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2043 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
| 2044 | { |
| 2045 | int status; |
| 2046 | |
| 2047 | status = nfs4_establish_lease(clp); |
| 2048 | if (status < 0) |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2049 | return nfs4_handle_reclaim_lease_error(clp, status); |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2050 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) |
| 2051 | nfs4_state_start_reclaim_nograce(clp); |
| 2052 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
| 2053 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
| 2054 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 2055 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 2056 | return 0; |
| 2057 | } |
| 2058 | |
| 2059 | static int nfs4_purge_lease(struct nfs_client *clp) |
| 2060 | { |
| 2061 | int status; |
| 2062 | |
| 2063 | status = nfs4_establish_lease(clp); |
| 2064 | if (status < 0) |
| 2065 | return nfs4_handle_reclaim_lease_error(clp, status); |
| 2066 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
| 2067 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
| 2068 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2069 | return 0; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2070 | } |
| 2071 | |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2072 | /* |
| 2073 | * Try remote migration of one FSID from a source server to a |
| 2074 | * destination server. The source server provides a list of |
| 2075 | * potential destinations. |
| 2076 | * |
| 2077 | * Returns zero or a negative NFS4ERR status code. |
| 2078 | */ |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2079 | static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred) |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2080 | { |
| 2081 | struct nfs_client *clp = server->nfs_client; |
| 2082 | struct nfs4_fs_locations *locations = NULL; |
| 2083 | struct inode *inode; |
| 2084 | struct page *page; |
| 2085 | int status, result; |
| 2086 | |
| 2087 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, |
| 2088 | (unsigned long long)server->fsid.major, |
| 2089 | (unsigned long long)server->fsid.minor, |
| 2090 | clp->cl_hostname); |
| 2091 | |
| 2092 | result = 0; |
| 2093 | page = alloc_page(GFP_KERNEL); |
| 2094 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); |
| 2095 | if (page == NULL || locations == NULL) { |
| 2096 | dprintk("<-- %s: no memory\n", __func__); |
| 2097 | goto out; |
| 2098 | } |
| 2099 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 2100 | inode = d_inode(server->super->s_root); |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2101 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
| 2102 | if (result) { |
| 2103 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", |
| 2104 | __func__, result); |
| 2105 | goto out; |
| 2106 | } |
| 2107 | |
| 2108 | result = -NFS4ERR_NXIO; |
| 2109 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { |
| 2110 | dprintk("<-- %s: No fs_locations data, migration skipped\n", |
| 2111 | __func__); |
| 2112 | goto out; |
| 2113 | } |
| 2114 | |
Trond Myklebust | 8aafd2f | 2018-08-11 11:52:38 -0400 | [diff] [blame] | 2115 | status = nfs4_begin_drain_session(clp); |
Wenwen Wang | 1e672e3 | 2019-08-20 22:21:21 -0500 | [diff] [blame] | 2116 | if (status != 0) { |
| 2117 | result = status; |
| 2118 | goto out; |
| 2119 | } |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2120 | |
| 2121 | status = nfs4_replace_transport(server, locations); |
| 2122 | if (status != 0) { |
| 2123 | dprintk("<-- %s: failed to replace transport: %d\n", |
| 2124 | __func__, status); |
| 2125 | goto out; |
| 2126 | } |
| 2127 | |
| 2128 | result = 0; |
| 2129 | dprintk("<-- %s: migration succeeded\n", __func__); |
| 2130 | |
| 2131 | out: |
| 2132 | if (page != NULL) |
| 2133 | __free_page(page); |
| 2134 | kfree(locations); |
| 2135 | if (result) { |
| 2136 | pr_err("NFS: migration recovery failed (server %s)\n", |
| 2137 | clp->cl_hostname); |
| 2138 | set_bit(NFS_MIG_FAILED, &server->mig_status); |
| 2139 | } |
| 2140 | return result; |
| 2141 | } |
| 2142 | |
| 2143 | /* |
| 2144 | * Returns zero or a negative NFS4ERR status code. |
| 2145 | */ |
| 2146 | static int nfs4_handle_migration(struct nfs_client *clp) |
| 2147 | { |
| 2148 | const struct nfs4_state_maintenance_ops *ops = |
| 2149 | clp->cl_mvops->state_renewal_ops; |
| 2150 | struct nfs_server *server; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2151 | const struct cred *cred; |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2152 | |
| 2153 | dprintk("%s: migration reported on \"%s\"\n", __func__, |
| 2154 | clp->cl_hostname); |
| 2155 | |
NeilBrown | f15e1e8 | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 2156 | cred = ops->get_state_renewal_cred(clp); |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2157 | if (cred == NULL) |
| 2158 | return -NFS4ERR_NOENT; |
| 2159 | |
| 2160 | clp->cl_mig_gen++; |
| 2161 | restart: |
| 2162 | rcu_read_lock(); |
| 2163 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 2164 | int status; |
| 2165 | |
| 2166 | if (server->mig_gen == clp->cl_mig_gen) |
| 2167 | continue; |
| 2168 | server->mig_gen = clp->cl_mig_gen; |
| 2169 | |
| 2170 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, |
| 2171 | &server->mig_status)) |
| 2172 | continue; |
| 2173 | |
| 2174 | rcu_read_unlock(); |
| 2175 | status = nfs4_try_migration(server, cred); |
| 2176 | if (status < 0) { |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2177 | put_cred(cred); |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2178 | return status; |
| 2179 | } |
| 2180 | goto restart; |
| 2181 | } |
| 2182 | rcu_read_unlock(); |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2183 | put_cred(cred); |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2184 | return 0; |
| 2185 | } |
| 2186 | |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 2187 | /* |
| 2188 | * Test each nfs_server on the clp's cl_superblocks list to see |
| 2189 | * if it's moved to another server. Stop when the server no longer |
| 2190 | * returns NFS4ERR_LEASE_MOVED. |
| 2191 | */ |
| 2192 | static int nfs4_handle_lease_moved(struct nfs_client *clp) |
| 2193 | { |
| 2194 | const struct nfs4_state_maintenance_ops *ops = |
| 2195 | clp->cl_mvops->state_renewal_ops; |
| 2196 | struct nfs_server *server; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2197 | const struct cred *cred; |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 2198 | |
| 2199 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, |
| 2200 | clp->cl_hostname); |
| 2201 | |
NeilBrown | f15e1e8 | 2018-12-03 11:30:30 +1100 | [diff] [blame] | 2202 | cred = ops->get_state_renewal_cred(clp); |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 2203 | if (cred == NULL) |
| 2204 | return -NFS4ERR_NOENT; |
| 2205 | |
| 2206 | clp->cl_mig_gen++; |
| 2207 | restart: |
| 2208 | rcu_read_lock(); |
| 2209 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 2210 | struct inode *inode; |
| 2211 | int status; |
| 2212 | |
| 2213 | if (server->mig_gen == clp->cl_mig_gen) |
| 2214 | continue; |
| 2215 | server->mig_gen = clp->cl_mig_gen; |
| 2216 | |
| 2217 | rcu_read_unlock(); |
| 2218 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 2219 | inode = d_inode(server->super->s_root); |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 2220 | status = nfs4_proc_fsid_present(inode, cred); |
| 2221 | if (status != -NFS4ERR_MOVED) |
| 2222 | goto restart; /* wasn't this one */ |
| 2223 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) |
| 2224 | goto restart; /* there are more */ |
| 2225 | goto out; |
| 2226 | } |
| 2227 | rcu_read_unlock(); |
| 2228 | |
| 2229 | out: |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2230 | put_cred(cred); |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 2231 | return 0; |
| 2232 | } |
| 2233 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2234 | /** |
| 2235 | * nfs4_discover_server_trunking - Detect server IP address trunking |
| 2236 | * |
| 2237 | * @clp: nfs_client under test |
| 2238 | * @result: OUT: found nfs_client, or clp |
| 2239 | * |
| 2240 | * Returns zero or a negative errno. If zero is returned, |
| 2241 | * an nfs_client pointer is planted in "result". |
| 2242 | * |
| 2243 | * Note: since we are invoked in process context, and |
| 2244 | * not from inside the state manager, we cannot use |
| 2245 | * nfs4_handle_reclaim_lease_error(). |
| 2246 | */ |
| 2247 | int nfs4_discover_server_trunking(struct nfs_client *clp, |
| 2248 | struct nfs_client **result) |
| 2249 | { |
| 2250 | const struct nfs4_state_recovery_ops *ops = |
| 2251 | clp->cl_mvops->reboot_recovery_ops; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2252 | struct rpc_clnt *clnt; |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2253 | const struct cred *cred; |
Chuck Lever | 4edaa30 | 2013-03-16 15:56:20 -0400 | [diff] [blame] | 2254 | int i, status; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2255 | |
| 2256 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); |
| 2257 | |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2258 | clnt = clp->cl_rpcclient; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2259 | i = 0; |
| 2260 | |
| 2261 | mutex_lock(&nfs_clid_init_mutex); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2262 | again: |
Trond Myklebust | ea33e6c | 2013-04-05 13:22:50 -0400 | [diff] [blame] | 2263 | status = -ENOENT; |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 2264 | cred = nfs4_get_clid_cred(clp); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2265 | if (cred == NULL) |
| 2266 | goto out_unlock; |
| 2267 | |
| 2268 | status = ops->detect_trunking(clp, result, cred); |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2269 | put_cred(cred); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2270 | switch (status) { |
| 2271 | case 0: |
Trond Myklebust | 898fc11 | 2017-06-21 10:16:56 -0400 | [diff] [blame] | 2272 | case -EINTR: |
| 2273 | case -ERESTARTSYS: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2274 | break; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2275 | case -ETIMEDOUT: |
Trond Myklebust | 150e726 | 2014-03-18 14:23:11 -0400 | [diff] [blame] | 2276 | if (clnt->cl_softrtry) |
| 2277 | break; |
Gustavo A. R. Silva | df561f66 | 2020-08-23 17:36:59 -0500 | [diff] [blame] | 2278 | fallthrough; |
Trond Myklebust | 150e726 | 2014-03-18 14:23:11 -0400 | [diff] [blame] | 2279 | case -NFS4ERR_DELAY: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2280 | case -EAGAIN: |
| 2281 | ssleep(1); |
Gustavo A. R. Silva | df561f66 | 2020-08-23 17:36:59 -0500 | [diff] [blame] | 2282 | fallthrough; |
Trond Myklebust | 202c312 | 2013-01-18 22:56:23 -0500 | [diff] [blame] | 2283 | case -NFS4ERR_STALE_CLIENTID: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2284 | dprintk("NFS: %s after status %d, retrying\n", |
| 2285 | __func__, status); |
| 2286 | goto again; |
Chuck Lever | 4edaa30 | 2013-03-16 15:56:20 -0400 | [diff] [blame] | 2287 | case -EACCES: |
Chuck Lever | d688f7b | 2013-07-24 12:28:28 -0400 | [diff] [blame] | 2288 | if (i++ == 0) { |
| 2289 | nfs4_root_machine_cred(clp); |
| 2290 | goto again; |
| 2291 | } |
Jeff Layton | 6d769f1 | 2013-11-13 09:08:21 -0500 | [diff] [blame] | 2292 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
Chuck Lever | 4edaa30 | 2013-03-16 15:56:20 -0400 | [diff] [blame] | 2293 | break; |
Gustavo A. R. Silva | df561f66 | 2020-08-23 17:36:59 -0500 | [diff] [blame] | 2294 | fallthrough; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2295 | case -NFS4ERR_CLID_INUSE: |
| 2296 | case -NFS4ERR_WRONGSEC: |
Jeff Layton | 6d769f1 | 2013-11-13 09:08:21 -0500 | [diff] [blame] | 2297 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
| 2298 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { |
| 2299 | status = -EPERM; |
| 2300 | break; |
| 2301 | } |
Chuck Lever | 79d852b | 2013-04-22 15:42:48 -0400 | [diff] [blame] | 2302 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2303 | if (IS_ERR(clnt)) { |
| 2304 | status = PTR_ERR(clnt); |
| 2305 | break; |
| 2306 | } |
Trond Myklebust | b193d59a | 2013-04-04 15:55:00 -0400 | [diff] [blame] | 2307 | /* Note: this is safe because we haven't yet marked the |
| 2308 | * client as ready, so we are the only user of |
| 2309 | * clp->cl_rpcclient |
| 2310 | */ |
| 2311 | clnt = xchg(&clp->cl_rpcclient, clnt); |
| 2312 | rpc_shutdown_client(clnt); |
| 2313 | clnt = clp->cl_rpcclient; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2314 | goto again; |
| 2315 | |
| 2316 | case -NFS4ERR_MINOR_VERS_MISMATCH: |
| 2317 | status = -EPROTONOSUPPORT; |
| 2318 | break; |
| 2319 | |
| 2320 | case -EKEYEXPIRED: |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2321 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
| 2322 | * in nfs4_exchange_id */ |
| 2323 | status = -EKEYEXPIRED; |
Trond Myklebust | ea33e6c | 2013-04-05 13:22:50 -0400 | [diff] [blame] | 2324 | break; |
| 2325 | default: |
| 2326 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", |
| 2327 | __func__, status); |
| 2328 | status = -EIO; |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2329 | } |
| 2330 | |
| 2331 | out_unlock: |
| 2332 | mutex_unlock(&nfs_clid_init_mutex); |
Chuck Lever | 05f4c35 | 2012-09-14 17:24:32 -0400 | [diff] [blame] | 2333 | dprintk("NFS: %s: status = %d\n", __func__, status); |
| 2334 | return status; |
| 2335 | } |
| 2336 | |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2337 | #ifdef CONFIG_NFS_V4_1 |
Trond Myklebust | 9f59479 | 2012-05-27 13:02:53 -0400 | [diff] [blame] | 2338 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2339 | { |
Trond Myklebust | 444f72f | 2011-05-26 14:26:35 -0400 | [diff] [blame] | 2340 | struct nfs_client *clp = session->clp; |
| 2341 | |
Trond Myklebust | 9f59479 | 2012-05-27 13:02:53 -0400 | [diff] [blame] | 2342 | switch (err) { |
| 2343 | default: |
| 2344 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 2345 | break; |
| 2346 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
| 2347 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 2348 | } |
Trond Myklebust | d94cbf6 | 2016-12-04 19:34:38 -0500 | [diff] [blame] | 2349 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2350 | } |
Andy Adamson | cbdabc7 | 2011-03-01 01:34:20 +0000 | [diff] [blame] | 2351 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2352 | |
Anna Schumaker | 3f10a6a | 2015-07-13 14:01:31 -0400 | [diff] [blame] | 2353 | void nfs41_notify_server(struct nfs_client *clp) |
Trond Myklebust | ac07483 | 2012-11-21 09:06:11 -0500 | [diff] [blame] | 2354 | { |
| 2355 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ |
| 2356 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
| 2357 | nfs4_schedule_state_manager(clp); |
| 2358 | } |
| 2359 | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2360 | static void nfs4_reset_all_state(struct nfs_client *clp) |
| 2361 | { |
| 2362 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2363 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
Trond Myklebust | be0bfed | 2012-05-25 16:02:15 -0400 | [diff] [blame] | 2364 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2365 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2366 | dprintk("%s: scheduling reset of all state for server %s!\n", |
| 2367 | __func__, clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2368 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2369 | } |
| 2370 | } |
| 2371 | |
| 2372 | static void nfs41_handle_server_reboot(struct nfs_client *clp) |
| 2373 | { |
| 2374 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { |
| 2375 | nfs4_state_start_reclaim_reboot(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2376 | dprintk("%s: server %s rebooted!\n", __func__, |
| 2377 | clp->cl_hostname); |
Trond Myklebust | 0400a6b | 2011-03-09 16:00:53 -0500 | [diff] [blame] | 2378 | nfs4_schedule_state_manager(clp); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2379 | } |
| 2380 | } |
| 2381 | |
Trond Myklebust | 8b895ce | 2015-07-05 15:12:06 -0400 | [diff] [blame] | 2382 | static void nfs41_handle_all_state_revoked(struct nfs_client *clp) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2383 | { |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2384 | nfs4_reset_all_state(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2385 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2386 | } |
| 2387 | |
Trond Myklebust | 8b895ce | 2015-07-05 15:12:06 -0400 | [diff] [blame] | 2388 | static void nfs41_handle_some_state_revoked(struct nfs_client *clp) |
| 2389 | { |
Trond Myklebust | 45870d6 | 2016-09-22 13:38:59 -0400 | [diff] [blame] | 2390 | nfs4_state_start_reclaim_nograce(clp); |
Trond Myklebust | 8b895ce | 2015-07-05 15:12:06 -0400 | [diff] [blame] | 2391 | nfs4_schedule_state_manager(clp); |
| 2392 | |
| 2393 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
| 2394 | } |
| 2395 | |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2396 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
| 2397 | { |
Trond Myklebust | 4099287 | 2015-07-05 15:20:53 -0400 | [diff] [blame] | 2398 | /* FIXME: For now, we destroy all layouts. */ |
| 2399 | pnfs_destroy_all_layouts(clp); |
Scott Mayhew | 8ca017c | 2019-05-06 11:59:05 -0400 | [diff] [blame] | 2400 | nfs_test_expired_all_delegations(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2401 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
| 2402 | clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2403 | } |
| 2404 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2405 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2406 | { |
Trond Myklebust | b135290 | 2015-07-05 15:26:58 -0400 | [diff] [blame] | 2407 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 2408 | nfs4_schedule_state_manager(clp); |
| 2409 | |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2410 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
| 2411 | clp->cl_hostname); |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2412 | } |
| 2413 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2414 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
| 2415 | { |
| 2416 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, |
| 2417 | &clp->cl_state) == 0) |
| 2418 | nfs4_schedule_state_manager(clp); |
| 2419 | } |
| 2420 | |
Trond Myklebust | 0a014a4 | 2016-09-22 13:38:51 -0400 | [diff] [blame] | 2421 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, |
| 2422 | bool recovery) |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 2423 | { |
| 2424 | if (!flags) |
| 2425 | return; |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2426 | |
| 2427 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", |
| 2428 | __func__, clp->cl_hostname, clp->cl_clientid, flags); |
Trond Myklebust | 0a014a4 | 2016-09-22 13:38:51 -0400 | [diff] [blame] | 2429 | /* |
| 2430 | * If we're called from the state manager thread, then assume we're |
| 2431 | * already handling the RECLAIM_NEEDED and/or STATE_REVOKED. |
| 2432 | * Those flags are expected to remain set until we're done |
| 2433 | * recovering (see RFC5661, section 18.46.3). |
| 2434 | */ |
| 2435 | if (recovery) |
| 2436 | goto out_recovery; |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2437 | |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 2438 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2439 | nfs41_handle_server_reboot(clp); |
Trond Myklebust | 8b895ce | 2015-07-05 15:12:06 -0400 | [diff] [blame] | 2440 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED)) |
| 2441 | nfs41_handle_all_state_revoked(clp); |
| 2442 | if (flags & (SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
Chuck Lever | d1c2331 | 2013-10-17 14:13:58 -0400 | [diff] [blame] | 2443 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
Trond Myklebust | 8b895ce | 2015-07-05 15:12:06 -0400 | [diff] [blame] | 2444 | nfs41_handle_some_state_revoked(clp); |
Chuck Lever | d1c2331 | 2013-10-17 14:13:58 -0400 | [diff] [blame] | 2445 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
| 2446 | nfs4_schedule_lease_moved_recovery(clp); |
Trond Myklebust | 111d489 | 2011-12-01 16:37:42 -0500 | [diff] [blame] | 2447 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2448 | nfs41_handle_recallable_state_revoked(clp); |
Trond Myklebust | 0a014a4 | 2016-09-22 13:38:51 -0400 | [diff] [blame] | 2449 | out_recovery: |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2450 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
| 2451 | nfs41_handle_backchannel_fault(clp); |
| 2452 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
| 2453 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) |
Trond Myklebust | 0f79fd6 | 2010-03-02 13:06:21 -0500 | [diff] [blame] | 2454 | nfs41_handle_cb_path_down(clp); |
Alexandros Batsakis | 0629e37 | 2009-12-05 13:46:14 -0500 | [diff] [blame] | 2455 | } |
| 2456 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2457 | static int nfs4_reset_session(struct nfs_client *clp) |
| 2458 | { |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2459 | const struct cred *cred; |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2460 | int status; |
| 2461 | |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2462 | if (!nfs4_has_session(clp)) |
| 2463 | return 0; |
Trond Myklebust | 8aafd2f | 2018-08-11 11:52:38 -0400 | [diff] [blame] | 2464 | status = nfs4_begin_drain_session(clp); |
| 2465 | if (status != 0) |
| 2466 | return status; |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 2467 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2468 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
Trond Myklebust | c489ee2 | 2013-01-30 13:04:10 -0500 | [diff] [blame] | 2469 | switch (status) { |
| 2470 | case 0: |
| 2471 | case -NFS4ERR_BADSESSION: |
| 2472 | case -NFS4ERR_DEADSESSION: |
| 2473 | break; |
| 2474 | case -NFS4ERR_BACK_CHAN_BUSY: |
| 2475 | case -NFS4ERR_DELAY: |
| 2476 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
| 2477 | status = 0; |
| 2478 | ssleep(1); |
| 2479 | goto out; |
| 2480 | default: |
Ricardo Labiaga | f455848 | 2009-12-07 09:16:09 -0500 | [diff] [blame] | 2481 | status = nfs4_recovery_handle_error(clp, status); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2482 | goto out; |
| 2483 | } |
| 2484 | |
| 2485 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); |
Trond Myklebust | 848f5bd | 2012-05-25 17:51:23 -0400 | [diff] [blame] | 2486 | status = nfs4_proc_create_session(clp, cred); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2487 | if (status) { |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2488 | dprintk("%s: session reset failed with status %d for server %s!\n", |
| 2489 | __func__, status, clp->cl_hostname); |
Trond Myklebust | f2c1b51 | 2012-05-27 14:46:46 -0400 | [diff] [blame] | 2490 | status = nfs4_handle_reclaim_lease_error(clp, status); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2491 | goto out; |
| 2492 | } |
Trond Myklebust | bda197f | 2012-06-05 10:22:14 -0400 | [diff] [blame] | 2493 | nfs41_finish_session_reset(clp); |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2494 | dprintk("%s: session reset was successful for server %s!\n", |
| 2495 | __func__, clp->cl_hostname); |
Andy Adamson | 41f54a5 | 2010-01-21 14:54:13 -0500 | [diff] [blame] | 2496 | out: |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2497 | put_cred(cred); |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2498 | return status; |
| 2499 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2500 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2501 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
| 2502 | { |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2503 | const struct cred *cred; |
Trond Myklebust | 2cf047c | 2012-05-25 17:57:41 -0400 | [diff] [blame] | 2504 | int ret; |
| 2505 | |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2506 | if (!nfs4_has_session(clp)) |
| 2507 | return 0; |
Trond Myklebust | 8aafd2f | 2018-08-11 11:52:38 -0400 | [diff] [blame] | 2508 | ret = nfs4_begin_drain_session(clp); |
| 2509 | if (ret != 0) |
| 2510 | return ret; |
Chuck Lever | 73d8bde | 2013-07-24 12:28:37 -0400 | [diff] [blame] | 2511 | cred = nfs4_get_clid_cred(clp); |
Trond Myklebust | 2cf047c | 2012-05-25 17:57:41 -0400 | [diff] [blame] | 2512 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
NeilBrown | a52458b | 2018-12-03 11:30:31 +1100 | [diff] [blame] | 2513 | put_cred(cred); |
Trond Myklebust | 43ac544 | 2012-05-27 13:47:21 -0400 | [diff] [blame] | 2514 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2515 | switch (ret) { |
| 2516 | case 0: |
Trond Myklebust | cc0a984 | 2012-05-28 15:12:27 -0400 | [diff] [blame] | 2517 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
| 2518 | __func__, clp->cl_hostname); |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2519 | break; |
| 2520 | case -NFS4ERR_DELAY: |
| 2521 | ssleep(1); |
| 2522 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
| 2523 | break; |
| 2524 | default: |
| 2525 | return nfs4_recovery_handle_error(clp, ret); |
| 2526 | } |
| 2527 | return 0; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2528 | } |
Trond Myklebust | b5fdf84 | 2020-02-18 15:58:31 -0500 | [diff] [blame] | 2529 | |
| 2530 | static void nfs4_layoutreturn_any_run(struct nfs_client *clp) |
| 2531 | { |
| 2532 | int iomode = 0; |
| 2533 | |
| 2534 | if (test_and_clear_bit(NFS4CLNT_RECALL_ANY_LAYOUT_READ, &clp->cl_state)) |
| 2535 | iomode += IOMODE_READ; |
| 2536 | if (test_and_clear_bit(NFS4CLNT_RECALL_ANY_LAYOUT_RW, &clp->cl_state)) |
| 2537 | iomode += IOMODE_RW; |
| 2538 | /* Note: IOMODE_READ + IOMODE_RW == IOMODE_ANY */ |
| 2539 | if (iomode) { |
| 2540 | pnfs_layout_return_unused_byclid(clp, iomode); |
| 2541 | set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); |
| 2542 | } |
| 2543 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2544 | #else /* CONFIG_NFS_V4_1 */ |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2545 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2546 | |
| 2547 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
| 2548 | { |
| 2549 | return 0; |
| 2550 | } |
Trond Myklebust | b5fdf84 | 2020-02-18 15:58:31 -0500 | [diff] [blame] | 2551 | |
| 2552 | static void nfs4_layoutreturn_any_run(struct nfs_client *clp) |
| 2553 | { |
| 2554 | } |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2555 | #endif /* CONFIG_NFS_V4_1 */ |
| 2556 | |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2557 | static void nfs4_state_manager(struct nfs_client *clp) |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2558 | { |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2559 | int status = 0; |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2560 | const char *section = "", *section_sep = ""; |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2561 | |
Trond Myklebust | 0286001 | 2008-12-23 15:21:40 -0500 | [diff] [blame] | 2562 | /* Ensure exclusive access to NFSv4 state */ |
Trond Myklebust | 47c2199 | 2011-04-15 17:34:18 -0400 | [diff] [blame] | 2563 | do { |
Chuck Lever | 511ba52 | 2019-11-05 11:04:07 -0500 | [diff] [blame] | 2564 | trace_nfs4_state_mgr(clp); |
Trond Myklebust | aeabb3c | 2018-11-19 20:11:45 -0500 | [diff] [blame] | 2565 | clear_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2566 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2567 | section = "purge state"; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2568 | status = nfs4_purge_lease(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2569 | if (status < 0) |
| 2570 | goto out_error; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2571 | continue; |
Chuck Lever | 2c820d9 | 2012-05-21 22:45:33 -0400 | [diff] [blame] | 2572 | } |
| 2573 | |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2574 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2575 | section = "lease expired"; |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2576 | /* We're going to have to re-establish a clientid */ |
| 2577 | status = nfs4_reclaim_lease(clp); |
Trond Myklebust | 2a6ee6a | 2012-05-25 15:00:06 -0400 | [diff] [blame] | 2578 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2579 | goto out_error; |
Trond Myklebust | b42353f | 2012-06-05 11:19:47 -0400 | [diff] [blame] | 2580 | continue; |
Trond Myklebust | e598d84 | 2008-12-23 15:21:42 -0500 | [diff] [blame] | 2581 | } |
| 2582 | |
Andy Adamson | c3fad1b | 2009-04-01 09:22:39 -0400 | [diff] [blame] | 2583 | /* Initialize or reset the session */ |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2584 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2585 | section = "reset session"; |
Andy Adamson | 4d643d1 | 2009-12-04 15:52:24 -0500 | [diff] [blame] | 2586 | status = nfs4_reset_session(clp); |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2587 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
| 2588 | continue; |
| 2589 | if (status < 0) |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2590 | goto out_error; |
Andy Adamson | 76db6d9 | 2009-04-01 09:22:38 -0400 | [diff] [blame] | 2591 | } |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2592 | |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2593 | /* Send BIND_CONN_TO_SESSION */ |
| 2594 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, |
Trond Myklebust | 1a47e7a | 2012-06-05 10:53:38 -0400 | [diff] [blame] | 2595 | &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2596 | section = "bind conn to session"; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2597 | status = nfs4_bind_conn_to_session(clp); |
| 2598 | if (status < 0) |
| 2599 | goto out_error; |
Trond Myklebust | bf674c8 | 2012-05-27 12:53:10 -0400 | [diff] [blame] | 2600 | continue; |
Weston Andros Adamson | a9e6444 | 2012-05-24 12:26:37 -0400 | [diff] [blame] | 2601 | } |
| 2602 | |
Trond Myklebust | 5df904a | 2012-11-21 09:22:14 -0500 | [diff] [blame] | 2603 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
| 2604 | section = "check lease"; |
| 2605 | status = nfs4_check_lease(clp); |
| 2606 | if (status < 0) |
| 2607 | goto out_error; |
Olga Kornievskaia | 8faaa6d | 2014-09-24 18:11:28 -0400 | [diff] [blame] | 2608 | continue; |
Chuck Lever | c9fdeb2 | 2013-10-17 14:13:02 -0400 | [diff] [blame] | 2609 | } |
| 2610 | |
| 2611 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { |
| 2612 | section = "migration"; |
| 2613 | status = nfs4_handle_migration(clp); |
| 2614 | if (status < 0) |
| 2615 | goto out_error; |
Trond Myklebust | 5df904a | 2012-11-21 09:22:14 -0500 | [diff] [blame] | 2616 | } |
| 2617 | |
Chuck Lever | b7f7a66 | 2013-10-17 14:13:35 -0400 | [diff] [blame] | 2618 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
| 2619 | section = "lease moved"; |
| 2620 | status = nfs4_handle_lease_moved(clp); |
| 2621 | if (status < 0) |
| 2622 | goto out_error; |
| 2623 | } |
| 2624 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2625 | /* First recover reboot state... */ |
Trond Myklebust | e345e88 | 2009-12-03 15:52:41 -0500 | [diff] [blame] | 2626 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2627 | section = "reclaim reboot"; |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 2628 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 2629 | clp->cl_mvops->reboot_recovery_ops); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 2630 | if (status == -EAGAIN) |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2631 | continue; |
| 2632 | if (status < 0) |
| 2633 | goto out_error; |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 2634 | nfs4_state_end_reclaim_reboot(clp); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2635 | } |
| 2636 | |
Trond Myklebust | 45870d6 | 2016-09-22 13:38:59 -0400 | [diff] [blame] | 2637 | /* Detect expired delegations... */ |
| 2638 | if (test_and_clear_bit(NFS4CLNT_DELEGATION_EXPIRED, &clp->cl_state)) { |
| 2639 | section = "detect expired delegations"; |
| 2640 | nfs_reap_expired_delegations(clp); |
| 2641 | continue; |
| 2642 | } |
| 2643 | |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2644 | /* Now recover expired state... */ |
Trond Myklebust | 67e7b52 | 2019-08-07 07:31:27 -0400 | [diff] [blame] | 2645 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2646 | section = "reclaim nograce"; |
Andy Adamson | 591d71c | 2009-04-01 09:22:47 -0400 | [diff] [blame] | 2647 | status = nfs4_do_reclaim(clp, |
Trond Myklebust | c48f4f3 | 2010-06-16 09:52:27 -0400 | [diff] [blame] | 2648 | clp->cl_mvops->nograce_recovery_ops); |
Trond Myklebust | df817ba3 | 2014-09-27 17:41:51 -0400 | [diff] [blame] | 2649 | if (status == -EAGAIN) |
Trond Myklebust | b6d408b | 2009-12-03 15:53:22 -0500 | [diff] [blame] | 2650 | continue; |
| 2651 | if (status < 0) |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2652 | goto out_error; |
Trond Myklebust | 67e7b52 | 2019-08-07 07:31:27 -0400 | [diff] [blame] | 2653 | clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
Trond Myklebust | b79a4a1 | 2008-12-23 15:21:41 -0500 | [diff] [blame] | 2654 | } |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 2655 | |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 2656 | nfs4_end_drain_session(clp); |
Trond Myklebust | aeabb3c | 2018-11-19 20:11:45 -0500 | [diff] [blame] | 2657 | nfs4_clear_state_manager_bit(clp); |
| 2658 | |
Trond Myklebust | b5fdf84 | 2020-02-18 15:58:31 -0500 | [diff] [blame] | 2659 | if (!test_and_set_bit(NFS4CLNT_RECALL_RUNNING, &clp->cl_state)) { |
Trond Myklebust | aeabb3c | 2018-11-19 20:11:45 -0500 | [diff] [blame] | 2660 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
| 2661 | nfs_client_return_marked_delegations(clp); |
| 2662 | set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); |
| 2663 | } |
Trond Myklebust | b5fdf84 | 2020-02-18 15:58:31 -0500 | [diff] [blame] | 2664 | nfs4_layoutreturn_any_run(clp); |
| 2665 | clear_bit(NFS4CLNT_RECALL_RUNNING, &clp->cl_state); |
Trond Myklebust | 707fb4b | 2008-12-23 15:21:47 -0500 | [diff] [blame] | 2666 | } |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2667 | |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2668 | /* Did we race with an attempt to give us more work? */ |
Trond Myklebust | aeabb3c | 2018-11-19 20:11:45 -0500 | [diff] [blame] | 2669 | if (!test_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state)) |
Trond Myklebust | 21a446c | 2018-11-05 11:10:50 -0500 | [diff] [blame] | 2670 | return; |
Trond Myklebust | f3c7649 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2671 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
Trond Myklebust | 21a446c | 2018-11-05 11:10:50 -0500 | [diff] [blame] | 2672 | return; |
Trond Myklebust | a1aa09be | 2018-11-05 12:17:01 -0500 | [diff] [blame] | 2673 | } while (refcount_read(&clp->cl_count) > 1 && !signalled()); |
Trond Myklebust | 21a446c | 2018-11-05 11:10:50 -0500 | [diff] [blame] | 2674 | goto out_drain; |
| 2675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2676 | out_error: |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2677 | if (strlen(section)) |
| 2678 | section_sep = ": "; |
Chuck Lever | 511ba52 | 2019-11-05 11:04:07 -0500 | [diff] [blame] | 2679 | trace_nfs4_state_mgr_failed(clp, section, status); |
Weston Andros Adamson | 8ed27d4 | 2012-05-29 15:57:59 -0400 | [diff] [blame] | 2680 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" |
| 2681 | " with error %d\n", section_sep, section, |
| 2682 | clp->cl_hostname, -status); |
Chuck Lever | ffe5a83 | 2012-09-14 17:23:23 -0400 | [diff] [blame] | 2683 | ssleep(1); |
Trond Myklebust | 21a446c | 2018-11-05 11:10:50 -0500 | [diff] [blame] | 2684 | out_drain: |
Alexandros Batsakis | 5601a00 | 2009-12-14 21:27:58 -0800 | [diff] [blame] | 2685 | nfs4_end_drain_session(clp); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2686 | nfs4_clear_state_manager_bit(clp); |
| 2687 | } |
| 2688 | |
| 2689 | static int nfs4_run_state_manager(void *ptr) |
| 2690 | { |
| 2691 | struct nfs_client *clp = ptr; |
| 2692 | |
| 2693 | allow_signal(SIGKILL); |
| 2694 | nfs4_state_manager(clp); |
| 2695 | nfs_put_client(clp); |
Eric W. Biederman | ca3574b | 2021-12-03 11:00:19 -0600 | [diff] [blame] | 2696 | module_put_and_kthread_exit(0); |
Trond Myklebust | e005e80 | 2008-12-23 15:21:48 -0500 | [diff] [blame] | 2697 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2698 | } |