blob: d88b779f9dd0a99a57bbbd3899d019edfa5c7c26 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 Myklebust6f43ddc2007-07-08 16:49:11 -040041#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/slab.h>
Arnd Bergmannb89f4322010-09-18 15:09:31 +020043#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/nfs_fs.h>
Trond Myklebust5043e902006-01-03 09:55:23 +010045#include <linux/kthread.h>
46#include <linux/module.h>
Trond Myklebust9f958ab2007-07-02 13:58:33 -040047#include <linux/random.h>
Randy Dunlap8c7597f2010-10-22 16:18:52 -070048#include <linux/ratelimit.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/workqueue.h>
50#include <linux/bitops.h>
Chuck Lever0aaaf5c2011-12-06 16:13:48 -050051#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Chuck Lever05f4c352012-09-14 17:24:32 -040053#include <linux/sunrpc/clnt.h>
54
Trond Myklebust4ce79712005-06-22 17:16:21 +000055#include "nfs4_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#include "callback.h"
57#include "delegation.h"
David Howells24c8dbb2006-08-22 20:06:10 -040058#include "internal.h"
Anna Schumaker40c64c22015-04-15 13:00:05 -040059#include "nfs4idmap.h"
Trond Myklebust76e697b2012-11-26 14:20:49 -050060#include "nfs4session.h"
Andy Adamson974cec82010-10-20 00:18:02 -040061#include "pnfs.h"
Stanislav Kinsburskybbe0a3a2012-08-20 18:00:36 +040062#include "netns.h"
Chuck Lever511ba522019-11-05 11:04:07 -050063#include "nfs4trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Chuck Levere3c0fb72012-05-21 22:45:24 -040065#define NFSDBG_FACILITY NFSDBG_STATE
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067#define OPENOWNER_POOL_SIZE 8
68
Trond Myklebust93b717f2016-05-16 17:42:43 -040069const nfs4_stateid zero_stateid = {
Linus Torvaldse0714ec2016-05-27 17:20:27 -070070 { .data = { 0 } },
Trond Myklebust93b717f2016-05-16 17:42:43 -040071 .type = NFS4_SPECIAL_STATEID_TYPE,
72};
Trond Myklebustfcd88432017-11-07 12:39:44 -050073const nfs4_stateid invalid_stateid = {
74 {
Trond Myklebust445f2882017-11-18 13:50:11 -050075 /* Funky initialiser keeps older gcc versions happy */
76 .data = { 0xff, 0xff, 0xff, 0xff, 0 },
Trond Myklebustfcd88432017-11-07 12:39:44 -050077 },
78 .type = NFS4_INVALID_STATEID_TYPE,
79};
80
Fred Isaman2409a972016-10-06 12:11:21 -040081const 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 Lever05f4c352012-09-14 17:24:32 -040089static DEFINE_MUTEX(nfs_clid_init_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Donald Buczek5b596832019-07-07 21:26:10 +020091static int nfs4_setup_state_renewal(struct nfs_client *clp)
92{
93 int status;
94 struct nfs_fsinfo fsinfo;
Donald Buczek5b596832019-07-07 21:26:10 +020095
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 Buczek5b596832019-07-07 21:26:10 +0200101 status = nfs4_proc_get_lease_time(clp, &fsinfo);
102 if (status == 0) {
Robert Milkowski7dc29932020-01-30 09:43:25 +0000103 nfs4_set_lease_period(clp, fsinfo.lease_time * HZ);
Donald Buczek5b596832019-07-07 21:26:10 +0200104 nfs4_schedule_state_renewal(clp);
105 }
106
107 return status;
108}
109
NeilBrowna52458b2018-12-03 11:30:31 +1100110int nfs4_init_clientid(struct nfs_client *clp, const struct cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111{
Trond Myklebustfd954ae2011-04-24 14:28:18 -0400112 struct nfs4_setclientid_res clid = {
113 .clientid = clp->cl_clientid,
114 .confirm = clp->cl_confirm,
115 };
Chuck Leverf738f512009-03-18 20:48:06 -0400116 unsigned short port;
117 int status;
Stanislav Kinsburskybbe0a3a2012-08-20 18:00:36 +0400118 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Chuck Leverf738f512009-03-18 20:48:06 -0400119
Trond Myklebustfd954ae2011-04-24 14:28:18 -0400120 if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state))
121 goto do_confirm;
Stanislav Kinsburskybbe0a3a2012-08-20 18:00:36 +0400122 port = nn->nfs_callback_tcpport;
Chuck Leverf738f512009-03-18 20:48:06 -0400123 if (clp->cl_addr.ss_family == AF_INET6)
Stanislav Kinsbursky29dcc162012-08-20 18:00:41 +0400124 port = nn->nfs_callback_tcpport6;
Chuck Leverf738f512009-03-18 20:48:06 -0400125
Trond Myklebustbb8b27e2010-04-16 16:43:06 -0400126 status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid);
127 if (status != 0)
128 goto out;
Trond Myklebustfd954ae2011-04-24 14:28:18 -0400129 clp->cl_clientid = clid.clientid;
130 clp->cl_confirm = clid.confirm;
131 set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state);
132do_confirm:
Trond Myklebustbb8b27e2010-04-16 16:43:06 -0400133 status = nfs4_proc_setclientid_confirm(clp, &clid, cred);
134 if (status != 0)
135 goto out;
Trond Myklebustfd954ae2011-04-24 14:28:18 -0400136 clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state);
Donald Buczek5b596832019-07-07 21:26:10 +0200137 nfs4_setup_state_renewal(clp);
Trond Myklebustbb8b27e2010-04-16 16:43:06 -0400138out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 return status;
140}
141
Chuck Lever05f4c352012-09-14 17:24:32 -0400142/**
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 */
155int nfs40_discover_server_trunking(struct nfs_client *clp,
156 struct nfs_client **result,
NeilBrowna52458b2018-12-03 11:30:31 +1100157 const struct cred *cred)
Chuck Lever05f4c352012-09-14 17:24:32 -0400158{
159 struct nfs4_setclientid_res clid = {
160 .clientid = clp->cl_clientid,
161 .confirm = clp->cl_confirm,
162 };
Trond Myklebust9f623872012-10-01 16:17:31 -0700163 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
Chuck Lever05f4c352012-09-14 17:24:32 -0400164 unsigned short port;
165 int status;
166
Trond Myklebust9f623872012-10-01 16:17:31 -0700167 port = nn->nfs_callback_tcpport;
Chuck Lever05f4c352012-09-14 17:24:32 -0400168 if (clp->cl_addr.ss_family == AF_INET6)
Trond Myklebust9f623872012-10-01 16:17:31 -0700169 port = nn->nfs_callback_tcpport6;
Chuck Lever05f4c352012-09-14 17:24:32 -0400170
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 Myklebust202c3122013-01-18 22:56:23 -0500178 if (status == 0) {
Chuck Lever05f4c352012-09-14 17:24:32 -0400179 /* 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);
ZhangXiaoxuf02f3752019-05-06 11:57:03 +0800182
183 /* If the client state need to recover, do it. */
184 if (clp->cl_state)
185 nfs4_schedule_state_manager(clp);
Chuck Lever05f4c352012-09-14 17:24:32 -0400186 }
Chuck Lever05f4c352012-09-14 17:24:32 -0400187out:
188 return status;
189}
190
NeilBrowna52458b2018-12-03 11:30:31 +1100191const struct cred *nfs4_get_machine_cred(struct nfs_client *clp)
Trond Myklebusta2b2bb82008-04-08 16:02:17 -0400192{
NeilBrowna52458b2018-12-03 11:30:31 +1100193 return get_cred(rpc_machine_cred());
Trond Myklebusta2b2bb82008-04-08 16:02:17 -0400194}
195
Chuck Leverd688f7b2013-07-24 12:28:28 -0400196static void nfs4_root_machine_cred(struct nfs_client *clp)
197{
Chuck Leverd688f7b2013-07-24 12:28:28 -0400198
NeilBrown5e169232018-12-03 11:30:30 +1100199 /* Force root creds instead of machine */
200 clp->cl_principal = NULL;
201 clp->cl_rpcclient->cl_principal = NULL;
Chuck Leverd688f7b2013-07-24 12:28:28 -0400202}
203
NeilBrowna52458b2018-12-03 11:30:31 +1100204static const struct cred *
Chuck Lever24d292b2010-12-24 01:32:43 +0000205nfs4_get_renew_cred_server_locked(struct nfs_server *server)
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100206{
NeilBrowna52458b2018-12-03 11:30:31 +1100207 const struct cred *cred = NULL;
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100208 struct nfs4_state_owner *sp;
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400209 struct rb_node *pos;
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100210
Chuck Lever24d292b2010-12-24 01:32:43 +0000211 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 Myklebustb4454fe2006-01-03 09:55:25 +0100215 if (list_empty(&sp->so_states))
216 continue;
NeilBrowna52458b2018-12-03 11:30:31 +1100217 cred = get_cred(sp->so_cred);
Trond Myklebustb4454fe2006-01-03 09:55:25 +0100218 break;
219 }
220 return cred;
221}
222
Chuck Lever24d292b2010-12-24 01:32:43 +0000223/**
NeilBrownf15e1e82018-12-03 11:30:30 +1100224 * nfs4_get_renew_cred - Acquire credential for a renew operation
Chuck Lever24d292b2010-12-24 01:32:43 +0000225 * @clp: client state handle
226 *
227 * Returns an rpc_cred with reference count bumped, or NULL.
228 * Caller must hold clp->cl_lock.
229 */
NeilBrowna52458b2018-12-03 11:30:31 +1100230const struct cred *nfs4_get_renew_cred(struct nfs_client *clp)
Chuck Lever24d292b2010-12-24 01:32:43 +0000231{
NeilBrowna52458b2018-12-03 11:30:31 +1100232 const struct cred *cred = NULL;
Chuck Lever24d292b2010-12-24 01:32:43 +0000233 struct nfs_server *server;
234
Sachin Prabhue49a29b2012-03-16 19:25:52 +0000235 /* Use machine credentials if available */
NeilBrownf15e1e82018-12-03 11:30:30 +1100236 cred = nfs4_get_machine_cred(clp);
Sachin Prabhue49a29b2012-03-16 19:25:52 +0000237 if (cred != NULL)
238 goto out;
239
NeilBrownf15e1e82018-12-03 11:30:30 +1100240 spin_lock(&clp->cl_lock);
Chuck Lever24d292b2010-12-24 01:32:43 +0000241 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();
NeilBrownf15e1e82018-12-03 11:30:30 +1100248 spin_unlock(&clp->cl_lock);
Sachin Prabhue49a29b2012-03-16 19:25:52 +0000249
250out:
Chuck Lever24d292b2010-12-24 01:32:43 +0000251 return cred;
252}
253
Andy Adamson62f288a2013-06-19 16:39:44 -0400254static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl)
Ricardo Labiaga9dfdf402009-12-06 12:57:34 -0500255{
Andy Adamson774d5f12013-05-20 14:13:50 -0400256 if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) {
Trond Myklebust961a8282012-01-17 22:57:37 -0500257 spin_lock(&tbl->slot_tbl_lock);
Trond Myklebustb75ad4c2012-11-29 17:27:47 -0500258 nfs41_wake_slot_table(tbl);
Trond Myklebust961a8282012-01-17 22:57:37 -0500259 spin_unlock(&tbl->slot_tbl_lock);
Alexandros Batsakis689cf5c2009-12-14 21:27:56 -0800260 }
Ricardo Labiaga9dfdf402009-12-06 12:57:34 -0500261}
262
Andy Adamson62f288a2013-06-19 16:39:44 -0400263static void nfs4_end_drain_session(struct nfs_client *clp)
264{
265 struct nfs4_session *ses = clp->cl_session;
266
Chuck Lever2cf8bca2013-08-09 12:49:56 -0400267 if (clp->cl_slot_tbl) {
268 nfs4_end_drain_slot_table(clp->cl_slot_tbl);
269 return;
270 }
271
Andy Adamson62f288a2013-06-19 16:39:44 -0400272 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 Adamson774d5f12013-05-20 14:13:50 -0400278static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl)
Ricardo Labiaga9dfdf402009-12-06 12:57:34 -0500279{
Andy Adamson774d5f12013-05-20 14:13:50 -0400280 set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state);
Ricardo Labiaga9dfdf402009-12-06 12:57:34 -0500281 spin_lock(&tbl->slot_tbl_lock);
Andy Adamsonb6bf6e72012-02-17 13:05:23 -0500282 if (tbl->highest_used_slotid != NFS4_NO_SLOT) {
Wolfram Sang16735d02013-11-14 14:32:02 -0800283 reinit_completion(&tbl->complete);
Ricardo Labiaga9dfdf402009-12-06 12:57:34 -0500284 spin_unlock(&tbl->slot_tbl_lock);
Andy Adamson42acd022011-01-06 02:04:34 +0000285 return wait_for_completion_interruptible(&tbl->complete);
Ricardo Labiaga9dfdf402009-12-06 12:57:34 -0500286 }
287 spin_unlock(&tbl->slot_tbl_lock);
288 return 0;
289}
290
Andy Adamson42acd022011-01-06 02:04:34 +0000291static int nfs4_begin_drain_session(struct nfs_client *clp)
292{
293 struct nfs4_session *ses = clp->cl_session;
Trond Myklebust8aafd2f2018-08-11 11:52:38 -0400294 int ret;
Andy Adamson42acd022011-01-06 02:04:34 +0000295
Chuck Lever2cf8bca2013-08-09 12:49:56 -0400296 if (clp->cl_slot_tbl)
297 return nfs4_drain_slot_tbl(clp->cl_slot_tbl);
298
Andy Adamson42acd022011-01-06 02:04:34 +0000299 /* back channel */
Andy Adamson774d5f12013-05-20 14:13:50 -0400300 ret = nfs4_drain_slot_tbl(&ses->bc_slot_table);
Andy Adamson42acd022011-01-06 02:04:34 +0000301 if (ret)
302 return ret;
303 /* fore channel */
Andy Adamson774d5f12013-05-20 14:13:50 -0400304 return nfs4_drain_slot_tbl(&ses->fc_slot_table);
Andy Adamson42acd022011-01-06 02:04:34 +0000305}
306
Chuck Leverc9fdeb22013-10-17 14:13:02 -0400307#if defined(CONFIG_NFS_V4_1)
308
Trond Myklebustbda197f2012-06-05 10:22:14 -0400309static 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 Myklebustbda197f2012-06-05 10:22:14 -0400314 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state);
Donald Buczekea51efa2019-07-07 21:26:09 +0200315 nfs4_setup_state_renewal(clp);
Trond Myklebustbda197f2012-06-05 10:22:14 -0400316}
317
NeilBrowna52458b2018-12-03 11:30:31 +1100318int nfs41_init_clientid(struct nfs_client *clp, const struct cred *cred)
Andy Adamson4d643d12009-12-04 15:52:24 -0500319{
320 int status;
321
Trond Myklebustfd954ae2011-04-24 14:28:18 -0400322 if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state))
323 goto do_confirm;
Andy Adamson4d643d12009-12-04 15:52:24 -0500324 status = nfs4_proc_exchange_id(clp, cred);
Ricardo Labiaga9430fb6b2009-12-06 12:23:46 -0500325 if (status != 0)
326 goto out;
Trond Myklebustfd954ae2011-04-24 14:28:18 -0400327 set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state);
328do_confirm:
Trond Myklebust848f5bd2012-05-25 17:51:23 -0400329 status = nfs4_proc_create_session(clp, cred);
Ricardo Labiaga9430fb6b2009-12-06 12:23:46 -0500330 if (status != 0)
331 goto out;
Trond Myklebustbda197f2012-06-05 10:22:14 -0400332 nfs41_finish_session_reset(clp);
Ricardo Labiaga9430fb6b2009-12-06 12:23:46 -0500333 nfs_mark_client_ready(clp, NFS_CS_READY);
334out:
Andy Adamson4d643d12009-12-04 15:52:24 -0500335 return status;
336}
337
Chuck Lever05f4c352012-09-14 17:24:32 -0400338/**
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 */
351int nfs41_discover_server_trunking(struct nfs_client *clp,
352 struct nfs_client **result,
NeilBrowna52458b2018-12-03 11:30:31 +1100353 const struct cred *cred)
Chuck Lever05f4c352012-09-14 17:24:32 -0400354{
355 int status;
356
357 status = nfs4_proc_exchange_id(clp, cred);
358 if (status != NFS4_OK)
359 return status;
360
Trond Myklebust48d66b92015-03-03 20:28:59 -0500361 status = nfs41_walk_client_list(clp, result, cred);
362 if (status < 0)
363 return status;
364 if (clp != *result)
365 return 0;
366
Chuck Lever8dcbec62017-06-08 11:52:44 -0400367 /*
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 Myklebust48d66b92015-03-03 20:28:59 -0500378 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 Lever05f4c352012-09-14 17:24:32 -0400383}
384
Andy Adamsonb4b82602009-04-01 09:22:49 -0400385#endif /* CONFIG_NFS_V4_1 */
386
Chuck Lever24d292b2010-12-24 01:32:43 +0000387/**
Chuck Lever73d8bde2013-07-24 12:28:37 -0400388 * nfs4_get_clid_cred - Acquire credential for a setclientid operation
Chuck Lever24d292b2010-12-24 01:32:43 +0000389 * @clp: client state handle
390 *
NeilBrowna52458b2018-12-03 11:30:31 +1100391 * Returns a cred with reference count bumped, or NULL.
Chuck Lever24d292b2010-12-24 01:32:43 +0000392 */
NeilBrowna52458b2018-12-03 11:30:31 +1100393const struct cred *nfs4_get_clid_cred(struct nfs_client *clp)
Chuck Lever24d292b2010-12-24 01:32:43 +0000394{
NeilBrowna52458b2018-12-03 11:30:31 +1100395 const struct cred *cred;
Chuck Lever24d292b2010-12-24 01:32:43 +0000396
NeilBrownf15e1e82018-12-03 11:30:30 +1100397 cred = nfs4_get_machine_cred(clp);
Chuck Lever24d292b2010-12-24 01:32:43 +0000398 return cred;
399}
400
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401static struct nfs4_state_owner *
NeilBrowna52458b2018-12-03 11:30:31 +1100402nfs4_find_state_owner_locked(struct nfs_server *server, const struct cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403{
Chuck Lever24d292b2010-12-24 01:32:43 +0000404 struct rb_node **p = &server->state_owners.rb_node,
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400405 *parent = NULL;
Chuck Lever414adf12011-12-06 16:13:39 -0500406 struct nfs4_state_owner *sp;
NeilBrowna52458b2018-12-03 11:30:31 +1100407 int cmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400409 while (*p != NULL) {
410 parent = *p;
Chuck Lever24d292b2010-12-24 01:32:43 +0000411 sp = rb_entry(parent, struct nfs4_state_owner, so_server_node);
NeilBrowna52458b2018-12-03 11:30:31 +1100412 cmp = cred_fscmp(cred, sp->so_cred);
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400413
NeilBrowna52458b2018-12-03 11:30:31 +1100414 if (cmp < 0)
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400415 p = &parent->rb_left;
NeilBrowna52458b2018-12-03 11:30:31 +1100416 else if (cmp > 0)
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400417 p = &parent->rb_right;
418 else {
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500419 if (!list_empty(&sp->so_lru))
420 list_del_init(&sp->so_lru);
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400421 atomic_inc(&sp->so_count);
Chuck Lever414adf12011-12-06 16:13:39 -0500422 return sp;
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400423 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 }
Chuck Lever414adf12011-12-06 16:13:39 -0500425 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426}
427
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400428static struct nfs4_state_owner *
Chuck Lever24d292b2010-12-24 01:32:43 +0000429nfs4_insert_state_owner_locked(struct nfs4_state_owner *new)
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400430{
Chuck Lever24d292b2010-12-24 01:32:43 +0000431 struct nfs_server *server = new->so_server;
432 struct rb_node **p = &server->state_owners.rb_node,
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400433 *parent = NULL;
434 struct nfs4_state_owner *sp;
NeilBrowna52458b2018-12-03 11:30:31 +1100435 int cmp;
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400436
437 while (*p != NULL) {
438 parent = *p;
Chuck Lever24d292b2010-12-24 01:32:43 +0000439 sp = rb_entry(parent, struct nfs4_state_owner, so_server_node);
NeilBrowna52458b2018-12-03 11:30:31 +1100440 cmp = cred_fscmp(new->so_cred, sp->so_cred);
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400441
NeilBrowna52458b2018-12-03 11:30:31 +1100442 if (cmp < 0)
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400443 p = &parent->rb_left;
NeilBrowna52458b2018-12-03 11:30:31 +1100444 else if (cmp > 0)
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400445 p = &parent->rb_right;
446 else {
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500447 if (!list_empty(&sp->so_lru))
448 list_del_init(&sp->so_lru);
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400449 atomic_inc(&sp->so_count);
450 return sp;
451 }
452 }
Chuck Lever24d292b2010-12-24 01:32:43 +0000453 rb_link_node(&new->so_server_node, parent, p);
454 rb_insert_color(&new->so_server_node, &server->state_owners);
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400455 return new;
456}
457
458static void
Chuck Lever24d292b2010-12-24 01:32:43 +0000459nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp)
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400460{
Chuck Lever24d292b2010-12-24 01:32:43 +0000461 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 Myklebust9f958ab2007-07-02 13:58:33 -0400465}
466
Trond Myklebust7ba127a2012-01-17 22:04:25 -0500467static void
468nfs4_init_seqid_counter(struct nfs_seqid_counter *sc)
469{
Trond Myklebust95b72eb2012-04-20 19:24:51 -0400470 sc->create_time = ktime_get();
Trond Myklebust7ba127a2012-01-17 22:04:25 -0500471 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
478static void
479nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc)
480{
481 rpc_destroy_wait_queue(&sc->wait);
482}
483
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484/*
485 * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to
486 * create a new state_owner.
487 *
488 */
489static struct nfs4_state_owner *
Trond Myklebustd1e284d2012-01-17 22:04:24 -0500490nfs4_alloc_state_owner(struct nfs_server *server,
NeilBrowna52458b2018-12-03 11:30:31 +1100491 const struct cred *cred,
Trond Myklebustd1e284d2012-01-17 22:04:24 -0500492 gfp_t gfp_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493{
494 struct nfs4_state_owner *sp;
495
Trond Myklebustd1e284d2012-01-17 22:04:24 -0500496 sp = kzalloc(sizeof(*sp), gfp_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 if (!sp)
498 return NULL;
Matthew Wilcoxaae57302018-03-14 19:48:27 -0700499 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 Myklebustd1e284d2012-01-17 22:04:24 -0500505 sp->so_server = server;
NeilBrowna52458b2018-12-03 11:30:31 +1100506 sp->so_cred = get_cred(cred);
Trond Myklebustec073422005-10-20 14:22:47 -0700507 spin_lock_init(&sp->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 INIT_LIST_HEAD(&sp->so_states);
Trond Myklebust7ba127a2012-01-17 22:04:25 -0500509 nfs4_init_seqid_counter(&sp->so_seqid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 atomic_set(&sp->so_count, 1);
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500511 INIT_LIST_HEAD(&sp->so_lru);
Ahmed S. Darwish76246c92020-07-20 17:55:27 +0200512 seqcount_spinlock_init(&sp->so_reclaim_seqcount, &sp->so_lock);
Trond Myklebust65b62a22013-02-07 10:54:07 -0500513 mutex_init(&sp->so_delegreturn_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 return sp;
515}
516
Adrian Bunk1d2e88e2008-05-02 13:42:45 -0700517static void
NeilBrown86cfb042016-12-19 11:48:23 +1100518nfs4_reset_state_owner(struct nfs4_state_owner *sp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
NeilBrown86cfb042016-12-19 11:48:23 +1100520 /* 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 Torvalds1da177e2005-04-16 15:20:36 -0700530}
531
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500532static void nfs4_free_state_owner(struct nfs4_state_owner *sp)
533{
Trond Myklebust7ba127a2012-01-17 22:04:25 -0500534 nfs4_destroy_seqid_counter(&sp->so_seqid);
NeilBrowna52458b2018-12-03 11:30:31 +1100535 put_cred(sp->so_cred);
Matthew Wilcoxaae57302018-03-14 19:48:27 -0700536 ida_simple_remove(&sp->so_server->openowner_id, sp->so_seqid.owner_id);
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500537 kfree(sp);
538}
539
540static 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 Lever24d292b2010-12-24 01:32:43 +0000565/**
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 Myklebust302fad72019-02-18 13:32:38 -0500569 * @gfp_flags: allocation mode
Chuck Lever24d292b2010-12-24 01:32:43 +0000570 *
571 * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL.
572 */
573struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server,
NeilBrowna52458b2018-12-03 11:30:31 +1100574 const struct cred *cred,
Trond Myklebustd1e284d2012-01-17 22:04:24 -0500575 gfp_t gfp_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576{
David Howells7539bba2006-08-22 20:06:09 -0400577 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 struct nfs4_state_owner *sp, *new;
579
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 spin_lock(&clp->cl_lock);
Chuck Lever24d292b2010-12-24 01:32:43 +0000581 sp = nfs4_find_state_owner_locked(server, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 spin_unlock(&clp->cl_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (sp != NULL)
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500584 goto out;
Trond Myklebustd1e284d2012-01-17 22:04:24 -0500585 new = nfs4_alloc_state_owner(server, cred, gfp_flags);
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400586 if (new == NULL)
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500587 goto out;
Matthew Wilcoxaae57302018-03-14 19:48:27 -0700588 spin_lock(&clp->cl_lock);
589 sp = nfs4_insert_state_owner_locked(new);
590 spin_unlock(&clp->cl_lock);
Trond Myklebustd1e284d2012-01-17 22:04:24 -0500591 if (sp != new)
592 nfs4_free_state_owner(new);
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500593out:
594 nfs4_gc_state_owners(server);
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400595 return sp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596}
597
Chuck Lever24d292b2010-12-24 01:32:43 +0000598/**
599 * nfs4_put_state_owner - Release a nfs4_state_owner
600 * @sp: state owner data to release
Trond Myklebust7bf97bc2012-04-21 12:36:19 -0400601 *
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 Lever24d292b2010-12-24 01:32:43 +0000609 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610void nfs4_put_state_owner(struct nfs4_state_owner *sp)
611{
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500612 struct nfs_server *server = sp->so_server;
613 struct nfs_client *clp = server->nfs_client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614
615 if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock))
616 return;
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500617
Trond Myklebust7bf97bc2012-04-21 12:36:19 -0400618 sp->so_expires = jiffies;
619 list_add_tail(&sp->so_lru, &server->state_owners_lru);
620 spin_unlock(&clp->cl_lock);
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500621}
622
623/**
624 * nfs4_purge_state_owners - Release all cached state owners
625 * @server: nfs_server with cached state owners to release
Trond Myklebustc77e2282019-08-03 10:11:27 -0400626 * @head: resulting list of state owners
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500627 *
628 * Called at umount time. Remaining state owners will be on
629 * the LRU with ref count of zero.
Trond Myklebustc77e2282019-08-03 10:11:27 -0400630 * 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 Lever0aaaf5c2011-12-06 16:13:48 -0500633 */
Trond Myklebustc77e2282019-08-03 10:11:27 -0400634void nfs4_purge_state_owners(struct nfs_server *server, struct list_head *head)
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500635{
636 struct nfs_client *clp = server->nfs_client;
637 struct nfs4_state_owner *sp, *tmp;
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500638
639 spin_lock(&clp->cl_lock);
640 list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) {
Trond Myklebustc77e2282019-08-03 10:11:27 -0400641 list_move(&sp->so_lru, head);
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500642 nfs4_remove_state_owner_locked(sp);
643 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 spin_unlock(&clp->cl_lock);
Trond Myklebustc77e2282019-08-03 10:11:27 -0400645}
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500646
Trond Myklebustc77e2282019-08-03 10:11:27 -0400647/**
Trond Myklebust6453bcd2021-03-04 20:29:50 -0500648 * nfs4_free_state_owners - Release all cached state owners
Trond Myklebustc77e2282019-08-03 10:11:27 -0400649 * @head: resulting list of state owners
650 *
651 * Frees a list of state owners that was generated by
652 * nfs4_purge_state_owners
653 */
654void 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 Lever0aaaf5c2011-12-06 16:13:48 -0500659 list_del(&sp->so_lru);
660 nfs4_free_state_owner(sp);
661 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662}
663
664static struct nfs4_state *
665nfs4_alloc_open_state(void)
666{
667 struct nfs4_state *state;
668
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400669 state = kzalloc(sizeof(*state), GFP_NOFS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 if (!state)
671 return NULL;
Trond Myklebustace9fad2018-09-02 19:19:07 -0400672 refcount_set(&state->count, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 INIT_LIST_HEAD(&state->lock_states);
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000674 spin_lock_init(&state->state_lock);
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400675 seqlock_init(&state->seqlock);
Trond Myklebustc9399f22017-11-06 15:28:01 -0500676 init_waitqueue_head(&state->waitq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 return state;
678}
679
Trond Myklebust4cecb762005-11-04 15:32:58 -0500680void
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500681nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode)
Trond Myklebust4cecb762005-11-04 15:32:58 -0500682{
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500683 if (state->state == fmode)
Trond Myklebust4cecb762005-11-04 15:32:58 -0500684 return;
685 /* NB! List reordering - see the reclaim code for why. */
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500686 if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) {
687 if (fmode & FMODE_WRITE)
Trond Myklebust4cecb762005-11-04 15:32:58 -0500688 list_move(&state->open_states, &state->owner->so_states);
689 else
690 list_move_tail(&state->open_states, &state->owner->so_states);
691 }
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500692 state->state = fmode;
Trond Myklebust4cecb762005-11-04 15:32:58 -0500693}
694
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695static struct nfs4_state *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696__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 Myklebust9ae075f2018-09-02 19:15:15 -0400701 list_for_each_entry_rcu(state, &nfsi->open_states, inode_states) {
Trond Myklebust1c816ef2007-07-03 14:41:19 -0400702 if (state->owner != owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 continue;
Trond Myklebust5d422302013-03-14 16:57:48 -0400704 if (!nfs4_valid_open_stateid(state))
705 continue;
Trond Myklebustace9fad2018-09-02 19:19:07 -0400706 if (refcount_inc_not_zero(&state->count))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 return state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 }
709 return NULL;
710}
711
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712static void
713nfs4_free_open_state(struct nfs4_state *state)
714{
Trond Myklebust9ae075f2018-09-02 19:15:15 -0400715 kfree_rcu(state, rcu_head);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716}
717
718struct nfs4_state *
719nfs4_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 Myklebust9ae075f2018-09-02 19:15:15 -0400724 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 state = __nfs4_find_state_byowner(inode, owner);
Trond Myklebust9ae075f2018-09-02 19:15:15 -0400726 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 if (state)
728 goto out;
729 new = nfs4_alloc_open_state();
Trond Myklebustec073422005-10-20 14:22:47 -0700730 spin_lock(&owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 spin_lock(&inode->i_lock);
732 state = __nfs4_find_state_byowner(inode, owner);
733 if (state == NULL && new != NULL) {
734 state = new;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 state->owner = owner;
736 atomic_inc(&owner->so_count);
Dave Chinner0444d762011-03-29 18:08:50 +1100737 ihold(inode);
738 state->inode = inode;
J. Bruce Fields29fe8392020-05-11 10:02:48 -0400739 list_add_rcu(&state->inode_states, &nfsi->open_states);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 spin_unlock(&inode->i_lock);
Trond Myklebustec073422005-10-20 14:22:47 -0700741 /* 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 Torvalds1da177e2005-04-16 15:20:36 -0700745 } else {
746 spin_unlock(&inode->i_lock);
Trond Myklebustec073422005-10-20 14:22:47 -0700747 spin_unlock(&owner->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 if (new)
749 nfs4_free_open_state(new);
750 }
751out:
752 return state;
753}
754
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755void 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 Myklebustace9fad2018-09-02 19:19:07 -0400760 if (!refcount_dec_and_lock(&state->count, &owner->so_lock))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 return;
Trond Myklebustec073422005-10-20 14:22:47 -0700762 spin_lock(&inode->i_lock);
Trond Myklebust9ae075f2018-09-02 19:15:15 -0400763 list_del_rcu(&state->inode_states);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 list_del(&state->open_states);
Trond Myklebustec073422005-10-20 14:22:47 -0700765 spin_unlock(&inode->i_lock);
766 spin_unlock(&owner->so_lock);
Trond Myklebustb7b7dac2020-01-27 09:58:17 -0500767 nfs4_inode_return_delegation_on_close(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 nfs4_free_open_state(state);
770 nfs4_put_state_owner(owner);
771}
772
773/*
Trond Myklebust83c9d412005-10-18 14:20:13 -0700774 * Close the current file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 */
Al Viro643168c2011-06-22 18:20:23 -0400776static void __nfs4_close(struct nfs4_state *state,
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400777 fmode_t fmode, gfp_t gfp_mask, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 struct nfs4_state_owner *owner = state->owner;
Trond Myklebust003707c2007-07-05 18:07:55 -0400780 int call_close = 0;
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500781 fmode_t newstate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
783 atomic_inc(&owner->so_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 /* Protect against nfs4_find_state() */
Trond Myklebustec073422005-10-20 14:22:47 -0700785 spin_lock(&owner->so_lock);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500786 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
Trond Myklebuste7616922006-01-03 09:55:13 +0100787 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 Myklebust003707c2007-07-05 18:07:55 -0400796 newstate = FMODE_READ|FMODE_WRITE;
Trond Myklebuste7616922006-01-03 09:55:13 +0100797 if (state->n_rdwr == 0) {
Trond Myklebust003707c2007-07-05 18:07:55 -0400798 if (state->n_rdonly == 0) {
Trond Myklebuste7616922006-01-03 09:55:13 +0100799 newstate &= ~FMODE_READ;
Trond Myklebust003707c2007-07-05 18:07:55 -0400800 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 Myklebuste7616922006-01-03 09:55:13 +0100804 newstate &= ~FMODE_WRITE;
Trond Myklebust003707c2007-07-05 18:07:55 -0400805 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 Myklebuste7616922006-01-03 09:55:13 +0100810 }
Trond Myklebust003707c2007-07-05 18:07:55 -0400811 nfs4_state_set_mode_locked(state, newstate);
Trond Myklebustec073422005-10-20 14:22:47 -0700812 spin_unlock(&owner->so_lock);
Trond Myklebust4cecb762005-11-04 15:32:58 -0500813
Trond Myklebust003707c2007-07-05 18:07:55 -0400814 if (!call_close) {
Trond Myklebustb39e6252007-06-11 23:05:07 -0400815 nfs4_put_open_state(state);
816 nfs4_put_state_owner(owner);
Trond Myklebust1f7977c2012-09-20 20:31:51 -0400817 } else
818 nfs4_do_close(state, gfp_mask, wait);
Trond Myklebusta49c3c72007-10-18 18:03:27 -0400819}
820
Al Viro643168c2011-06-22 18:20:23 -0400821void nfs4_close_state(struct nfs4_state *state, fmode_t fmode)
Trond Myklebusta49c3c72007-10-18 18:03:27 -0400822{
Al Viro643168c2011-06-22 18:20:23 -0400823 __nfs4_close(state, fmode, GFP_NOFS, 0);
Trond Myklebusta49c3c72007-10-18 18:03:27 -0400824}
825
Al Viro643168c2011-06-22 18:20:23 -0400826void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode)
Trond Myklebusta49c3c72007-10-18 18:03:27 -0400827{
Al Viro643168c2011-06-22 18:20:23 -0400828 __nfs4_close(state, fmode, GFP_KERNEL, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829}
830
831/*
832 * Search the state->lock_states for an existing lock_owner
NeilBrown3f8f2542016-12-19 11:33:13 +1100833 * 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 Torvalds1da177e2005-04-16 15:20:36 -0700843 */
844static struct nfs4_lock_state *
NeilBrown8d424432016-10-13 15:26:47 +1100845__nfs4_find_lock_state(struct nfs4_state *state,
846 fl_owner_t fl_owner, fl_owner_t fl_owner2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847{
NeilBrown3f8f2542016-12-19 11:33:13 +1100848 struct nfs4_lock_state *pos, *ret = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 list_for_each_entry(pos, &state->lock_states, ls_locks) {
NeilBrown3f8f2542016-12-19 11:33:13 +1100850 if (pos->ls_owner == fl_owner) {
851 ret = pos;
852 break;
853 }
854 if (pos->ls_owner == fl_owner2)
855 ret = pos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 }
NeilBrown3f8f2542016-12-19 11:33:13 +1100857 if (ret)
Elena Reshetova194bc1f2017-10-20 12:53:36 +0300858 refcount_inc(&ret->ls_count);
NeilBrown3f8f2542016-12-19 11:33:13 +1100859 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860}
861
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862/*
863 * Return a compatible lock_state. If no initialized lock_state structure
864 * exists, return an uninitialized one.
865 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 */
Jeff Layton8003d3c42014-05-01 06:28:45 -0400867static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868{
869 struct nfs4_lock_state *lsp;
Chuck Lever24d292b2010-12-24 01:32:43 +0000870 struct nfs_server *server = state->owner->so_server;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400872 lsp = kzalloc(sizeof(*lsp), GFP_NOFS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 if (lsp == NULL)
874 return NULL;
Trond Myklebust7ba127a2012-01-17 22:04:25 -0500875 nfs4_init_seqid_counter(&lsp->ls_seqid);
Elena Reshetova194bc1f2017-10-20 12:53:36 +0300876 refcount_set(&lsp->ls_count, 1);
Trond Myklebustb64aec82009-07-21 16:47:46 -0400877 lsp->ls_state = state;
Jeff Layton8003d3c42014-05-01 06:28:45 -0400878 lsp->ls_owner = fl_owner;
Trond Myklebust48c22eb2012-01-17 22:04:25 -0500879 lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS);
880 if (lsp->ls_seqid.owner_id < 0)
Trond Myklebustd2d7ce22012-01-17 22:04:25 -0500881 goto out_free;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000882 INIT_LIST_HEAD(&lsp->ls_locks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 return lsp;
Trond Myklebustd2d7ce22012-01-17 22:04:25 -0500884out_free:
885 kfree(lsp);
886 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887}
888
Trond Myklebust5ae67c42012-03-19 16:17:18 -0400889void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400890{
Trond Myklebust48c22eb2012-01-17 22:04:25 -0500891 ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id);
Trond Myklebust7ba127a2012-01-17 22:04:25 -0500892 nfs4_destroy_seqid_counter(&lsp->ls_seqid);
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400893 kfree(lsp);
894}
895
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896/*
897 * Return a compatible lock_state. If no initialized lock_state structure
898 * exists, return an uninitialized one.
899 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 */
Jeff Layton8003d3c42014-05-01 06:28:45 -0400901static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902{
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000903 struct nfs4_lock_state *lsp, *new = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000905 for(;;) {
906 spin_lock(&state->state_lock);
Wei Yongjun68e33bd2017-01-12 15:39:18 +0000907 lsp = __nfs4_find_lock_state(state, owner, NULL);
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000908 if (lsp != NULL)
909 break;
910 if (new != NULL) {
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000911 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 Layton8003d3c42014-05-01 06:28:45 -0400918 new = nfs4_alloc_lock_state(state, owner);
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000919 if (new == NULL)
920 return NULL;
921 }
922 spin_unlock(&state->state_lock);
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400923 if (new != NULL)
Trond Myklebust5ae67c42012-03-19 16:17:18 -0400924 nfs4_free_lock_state(state->owner->so_server, new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 return lsp;
926}
927
928/*
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000929 * Release reference to lock_state, and free it if we see that
930 * it is no longer in use
931 */
Trond Myklebustfaf5f492005-10-18 14:20:15 -0700932void nfs4_put_lock_state(struct nfs4_lock_state *lsp)
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000933{
Trond Myklebustc8b2d0b2013-05-03 16:22:55 -0400934 struct nfs_server *server;
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000935 struct nfs4_state *state;
936
937 if (lsp == NULL)
938 return;
939 state = lsp->ls_state;
Elena Reshetova194bc1f2017-10-20 12:53:36 +0300940 if (!refcount_dec_and_lock(&lsp->ls_count, &state->state_lock))
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000941 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 Layton0c0e0d32014-09-08 08:26:01 -0400946 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 Myklebustc8b2d0b2013-05-03 16:22:55 -0400952 nfs4_free_lock_state(server, lsp);
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000953}
954
955static 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 Reshetova194bc1f2017-10-20 12:53:36 +0300960 refcount_inc(&lsp->ls_count);
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000961}
962
963static void nfs4_fl_release_lock(struct file_lock *fl)
964{
965 nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner);
966}
967
Alexey Dobriyan6aed6282009-09-21 17:01:11 -0700968static const struct file_lock_operations nfs4_fl_lock_ops = {
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000969 .fl_copy_lock = nfs4_fl_copy_lock,
970 .fl_release_private = nfs4_fl_release_lock,
971};
972
973int 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 Layton8003d3c42014-05-01 06:28:45 -0400979 lsp = nfs4_get_lock_state(state, fl->fl_owner);
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000980 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 Myklebust5521abf2013-03-16 20:54:34 -0400987static int nfs4_copy_lock_stateid(nfs4_stateid *dst,
988 struct nfs4_state *state,
NeilBrown17393472016-10-13 15:26:47 +1100989 const struct nfs_lock_context *l_ctx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990{
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000991 struct nfs4_lock_state *lsp;
NeilBrown8d424432016-10-13 15:26:47 +1100992 fl_owner_t fl_owner, fl_flock_owner;
Trond Myklebust5521abf2013-03-16 20:54:34 -0400993 int ret = -ENOENT;
Trond Myklebust4fc87962012-03-08 17:42:01 -0500994
NeilBrown17393472016-10-13 15:26:47 +1100995 if (l_ctx == NULL)
Trond Myklebust2a369152012-08-13 18:54:45 -0400996 goto out;
997
Trond Myklebust4fc87962012-03-08 17:42:01 -0500998 if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
999 goto out;
1000
NeilBrownd51fdb82016-10-13 15:26:47 +11001001 fl_owner = l_ctx->lockowner;
NeilBrown8d424432016-10-13 15:26:47 +11001002 fl_flock_owner = l_ctx->open_context->flock_owner;
1003
Trond Myklebust4fc87962012-03-08 17:42:01 -05001004 spin_lock(&state->state_lock);
NeilBrown8d424432016-10-13 15:26:47 +11001005 lsp = __nfs4_find_lock_state(state, fl_owner, fl_flock_owner);
NeilBrownef1820f2013-09-04 17:04:49 +10001006 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 Myklebust4fc87962012-03-08 17:42:01 -05001009 nfs4_stateid_copy(dst, &lsp->ls_stateid);
Trond Myklebust5521abf2013-03-16 20:54:34 -04001010 ret = 0;
Trond Myklebust4fc87962012-03-08 17:42:01 -05001011 }
1012 spin_unlock(&state->state_lock);
1013 nfs4_put_lock_state(lsp);
1014out:
1015 return ret;
1016}
1017
Trond Myklebustc82bac62017-11-06 15:28:06 -05001018bool nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state)
Trond Myklebust4fc87962012-03-08 17:42:01 -05001019{
Trond Myklebustc82bac62017-11-06 15:28:06 -05001020 bool ret;
Trond Myklebust92b40e92013-04-20 01:25:45 -04001021 const nfs4_stateid *src;
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001022 int seq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001024 do {
Trond Myklebustc82bac62017-11-06 15:28:06 -05001025 ret = false;
Trond Myklebust92b40e92013-04-20 01:25:45 -04001026 src = &zero_stateid;
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001027 seq = read_seqbegin(&state->seqlock);
Trond Myklebustc82bac62017-11-06 15:28:06 -05001028 if (test_bit(NFS_OPEN_STATE, &state->flags)) {
Trond Myklebust92b40e92013-04-20 01:25:45 -04001029 src = &state->open_stateid;
Trond Myklebustc82bac62017-11-06 15:28:06 -05001030 ret = true;
1031 }
Trond Myklebust92b40e92013-04-20 01:25:45 -04001032 nfs4_stateid_copy(dst, src);
Trond Myklebust8bda4e42007-07-09 10:45:42 -04001033 } while (read_seqretry(&state->seqlock, seq));
Trond Myklebustc82bac62017-11-06 15:28:06 -05001034 return ret;
Trond Myklebust4fc87962012-03-08 17:42:01 -05001035}
Trond Myklebust8d0a8a92005-06-22 17:16:32 +00001036
Trond Myklebust4fc87962012-03-08 17:42:01 -05001037/*
1038 * Byte-range lock aware utility to initialize the stateid of read/write
1039 * requests.
1040 */
Trond Myklebustabf4e132016-05-16 17:42:44 -04001041int nfs4_select_rw_stateid(struct nfs4_state *state,
NeilBrown17393472016-10-13 15:26:47 +11001042 fmode_t fmode, const struct nfs_lock_context *l_ctx,
NeilBrowna52458b2018-12-03 11:30:31 +11001043 nfs4_stateid *dst, const struct cred **cred)
Trond Myklebust4fc87962012-03-08 17:42:01 -05001044{
Trond Myklebustabf4e132016-05-16 17:42:44 -04001045 int ret;
1046
Trond Myklebust7ebeb7f2016-09-22 13:39:20 -04001047 if (!nfs4_valid_open_stateid(state))
1048 return -EIO;
Trond Myklebustabf4e132016-05-16 17:42:44 -04001049 if (cred != NULL)
1050 *cred = NULL;
NeilBrown17393472016-10-13 15:26:47 +11001051 ret = nfs4_copy_lock_stateid(dst, state, l_ctx);
NeilBrownef1820f2013-09-04 17:04:49 +10001052 if (ret == -EIO)
1053 /* A lost lock - don't even consider delegations */
1054 goto out;
Andy Adamson146d70c2014-02-18 10:36:05 -05001055 /* returns true if delegation stateid found and copied */
Trond Myklebustabf4e132016-05-16 17:42:44 -04001056 if (nfs4_copy_delegation_stateid(state->inode, fmode, dst, cred)) {
Andy Adamson146d70c2014-02-18 10:36:05 -05001057 ret = 0;
Trond Myklebust5521abf2013-03-16 20:54:34 -04001058 goto out;
Andy Adamson146d70c2014-02-18 10:36:05 -05001059 }
Trond Myklebust5521abf2013-03-16 20:54:34 -04001060 if (ret != -ENOENT)
NeilBrownef1820f2013-09-04 17:04:49 +10001061 /* 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 Myklebust5521abf2013-03-16 20:54:34 -04001065 goto out;
Trond Myklebustd9aba2b2019-07-16 15:38:28 -04001066 ret = nfs4_copy_open_stateid(dst, state) ? 0 : -EAGAIN;
Trond Myklebust5521abf2013-03-16 20:54:34 -04001067out:
Trond Myklebust3b664862013-03-17 15:31:15 -04001068 if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41))
1069 dst->seqid = 0;
Trond Myklebust5521abf2013-03-16 20:54:34 -04001070 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071}
1072
Trond Myklebust8535b2b2010-05-13 12:51:01 -04001073struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074{
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001075 struct nfs_seqid *new;
1076
Trond Myklebust8535b2b2010-05-13 12:51:01 -04001077 new = kmalloc(sizeof(*new), gfp_mask);
Trond Myklebustbadc76d2015-01-23 18:48:00 -05001078 if (new == NULL)
1079 return ERR_PTR(-ENOMEM);
1080 new->sequence = counter;
1081 INIT_LIST_HEAD(&new->list);
1082 new->task = NULL;
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001083 return new;
1084}
1085
Trond Myklebust72211db2009-12-15 14:47:36 -05001086void nfs_release_seqid(struct nfs_seqid *seqid)
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001087{
Trond Myklebust4601df22012-01-20 18:47:05 -05001088 struct nfs_seqid_counter *sequence;
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001089
Trond Myklebusta6796412015-01-23 19:04:44 -05001090 if (seqid == NULL || list_empty(&seqid->list))
Trond Myklebust4601df22012-01-20 18:47:05 -05001091 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 Myklebust2f74c0a2008-01-08 17:56:07 -05001101 }
Trond Myklebust4601df22012-01-20 18:47:05 -05001102 spin_unlock(&sequence->lock);
Trond Myklebust72211db2009-12-15 14:47:36 -05001103}
1104
1105void nfs_free_seqid(struct nfs_seqid *seqid)
1106{
1107 nfs_release_seqid(seqid);
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001108 kfree(seqid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109}
1110
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111/*
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001112 * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
1113 * failed with a seqid incrementing error -
Toralf Förster16a6ddc2013-12-12 19:09:00 +01001114 * see comments nfs4.h:seqid_mutating_error()
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001115 */
Trond Myklebust88d90932007-07-02 14:03:03 -04001116static void nfs_increment_seqid(int status, struct nfs_seqid *seqid)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117{
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001118 switch (status) {
1119 case 0:
1120 break;
1121 case -NFS4ERR_BAD_SEQID:
Trond Myklebust6f43ddc2007-07-08 16:49:11 -04001122 if (seqid->sequence->flags & NFS_SEQID_CONFIRMED)
1123 return;
Trond Myklebust9a3ba432012-03-12 18:01:48 -04001124 pr_warn_ratelimited("NFS: v4 server returned a bad"
Dan Muntz497799e2008-02-13 13:09:35 -08001125 " sequence-id error on an"
1126 " unconfirmed sequence %p!\n",
Trond Myklebust6f43ddc2007-07-08 16:49:11 -04001127 seqid->sequence);
Gustavo A. R. Silvaffb81712020-11-20 12:26:46 -06001128 return;
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001129 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 Lever406dab82017-01-26 15:14:52 -05001135 case -NFS4ERR_MOVED:
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001136 /* Non-seqid mutating errors */
1137 return;
zhengbin8b98a532019-12-19 18:34:47 +08001138 }
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001139 /*
1140 * Note: no locking needed as we are guaranteed to be first
1141 * on the sequence list
1142 */
1143 seqid->sequence->counter++;
1144}
1145
1146void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid)
1147{
Trond Myklebusta6796412015-01-23 19:04:44 -05001148 struct nfs4_state_owner *sp;
Benny Halevy34dc1ad2009-04-01 09:22:52 -04001149
Trond Myklebusta6796412015-01-23 19:04:44 -05001150 if (seqid == NULL)
1151 return;
1152
1153 sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid);
Benny Halevy34dc1ad2009-04-01 09:22:52 -04001154 if (status == -NFS4ERR_BAD_SEQID)
NeilBrown86cfb042016-12-19 11:48:23 +11001155 nfs4_reset_state_owner(sp);
Trond Myklebusta6796412015-01-23 19:04:44 -05001156 if (!nfs4_has_session(sp->so_server->nfs_client))
Benny Halevy34dc1ad2009-04-01 09:22:52 -04001157 nfs_increment_seqid(status, seqid);
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001158}
1159
1160/*
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001161 * Increment the seqid if the LOCK/LOCKU succeeded, or
1162 * failed with a seqid incrementing error -
Toralf Förster16a6ddc2013-12-12 19:09:00 +01001163 * see comments nfs4.h:seqid_mutating_error()
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001164 */
1165void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid)
1166{
Trond Myklebusta6796412015-01-23 19:04:44 -05001167 if (seqid != NULL)
1168 nfs_increment_seqid(status, seqid);
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001169}
1170
1171int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task)
1172{
Trond Myklebusta6796412015-01-23 19:04:44 -05001173 struct nfs_seqid_counter *sequence;
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001174 int status = 0;
1175
Trond Myklebusta6796412015-01-23 19:04:44 -05001176 if (seqid == NULL)
1177 goto out;
1178 sequence = seqid->sequence;
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001179 spin_lock(&sequence->lock);
Trond Myklebust4601df22012-01-20 18:47:05 -05001180 seqid->task = task;
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05001181 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 Myklebust5d008372008-02-22 16:34:17 -05001185 rpc_sleep_on(&sequence->wait, task, NULL);
Trond Myklebust2f74c0a2008-01-08 17:56:07 -05001186 status = -EAGAIN;
1187unlock:
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001188 spin_unlock(&sequence->lock);
Trond Myklebusta6796412015-01-23 19:04:44 -05001189out:
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001190 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191}
1192
Trond Myklebuste005e802008-12-23 15:21:48 -05001193static int nfs4_run_state_manager(void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
Trond Myklebuste005e802008-12-23 15:21:48 -05001195static void nfs4_clear_state_manager_bit(struct nfs_client *clp)
Trond Myklebust433fbe42006-01-03 09:55:22 +01001196{
Trond Myklebust43d20e82021-07-13 12:28:22 -04001197 clear_and_wake_up_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state);
Trond Myklebust433fbe42006-01-03 09:55:22 +01001198 rpc_wake_up(&clp->cl_rpcwaitq);
1199}
1200
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201/*
Trond Myklebuste005e802008-12-23 15:21:48 -05001202 * Schedule the nfs_client asynchronous state management routine
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 */
Trond Myklebustb0d3ded2008-12-23 15:21:50 -05001204void nfs4_schedule_state_manager(struct nfs_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205{
Trond Myklebust5043e902006-01-03 09:55:23 +01001206 struct task_struct *task;
Trond Myklebust2446ab62012-03-01 17:00:56 -05001207 char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208
Trond Myklebustaeabb3c2018-11-19 20:11:45 -05001209 set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state);
Trond Myklebuste005e802008-12-23 15:21:48 -05001210 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0)
1211 return;
Trond Myklebust5043e902006-01-03 09:55:23 +01001212 __module_get(THIS_MODULE);
Elena Reshetova212bf412017-10-20 12:53:38 +03001213 refcount_inc(&clp->cl_count);
Trond Myklebust2446ab62012-03-01 17:00:56 -05001214
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 Cookf1701682013-07-03 15:04:58 -07001222 task = kthread_run(nfs4_run_state_manager, clp, "%s", buf);
Trond Myklebust2446ab62012-03-01 17:00:56 -05001223 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 Torvalds1da177e2005-04-16 15:20:36 -07001230}
1231
1232/*
Trond Myklebust0400a6b2011-03-09 16:00:53 -05001233 * Schedule a lease recovery attempt
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 */
Trond Myklebust0400a6b2011-03-09 16:00:53 -05001235void nfs4_schedule_lease_recovery(struct nfs_client *clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236{
1237 if (!clp)
1238 return;
Trond Myklebuste598d842008-12-23 15:21:42 -05001239 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
1240 set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
Trond Myklebustcc0a9842012-05-28 15:12:27 -04001241 dprintk("%s: scheduling lease recovery for server %s\n", __func__,
1242 clp->cl_hostname);
Trond Myklebuste005e802008-12-23 15:21:48 -05001243 nfs4_schedule_state_manager(clp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244}
Andy Adamson9cb81962012-03-07 10:49:41 -05001245EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246
Chuck Leverc9fdeb22013-10-17 14:13:02 -04001247/**
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 */
1255int 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}
1281EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery);
1282
Chuck Leverb7f7a662013-10-17 14:13:35 -04001283/**
1284 * nfs4_schedule_lease_moved_recovery - start lease-moved recovery
1285 *
1286 * @clp: server to check for moved leases
1287 *
1288 */
1289void 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}
1297EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery);
1298
Trond Myklebust33021272012-11-26 13:13:29 -05001299int nfs4_wait_clnt_recover(struct nfs_client *clp)
1300{
1301 int res;
1302
1303 might_sleep();
1304
Elena Reshetova212bf412017-10-20 12:53:38 +03001305 refcount_inc(&clp->cl_count);
NeilBrown74316202014-07-07 15:16:04 +10001306 res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
1307 nfs_wait_bit_killable, TASK_KILLABLE);
Trond Myklebust33021272012-11-26 13:13:29 -05001308 if (res)
Chuck Lever0625c2d2013-10-17 14:14:10 -04001309 goto out;
Trond Myklebust33021272012-11-26 13:13:29 -05001310 if (clp->cl_cons_state < 0)
Chuck Lever0625c2d2013-10-17 14:14:10 -04001311 res = clp->cl_cons_state;
1312out:
1313 nfs_put_client(clp);
1314 return res;
Trond Myklebust33021272012-11-26 13:13:29 -05001315}
1316
1317int 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 Myklebustad1e3962012-03-10 11:23:15 -05001335/*
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 */
1343static 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 Myklebustcc0a9842012-05-28 15:12:27 -04001347 dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__,
1348 clp->cl_hostname);
Trond Myklebustad1e3962012-03-10 11:23:15 -05001349}
1350
Trond Myklebust042b60b2011-08-24 15:07:37 -04001351void nfs4_schedule_path_down_recovery(struct nfs_client *clp)
1352{
Trond Myklebustad1e3962012-03-10 11:23:15 -05001353 nfs40_handle_cb_pathdown(clp);
Trond Myklebust042b60b2011-08-24 15:07:37 -04001354 nfs4_schedule_state_manager(clp);
1355}
1356
Trond Myklebustf9feab12011-03-09 16:12:46 -05001357static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state)
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001358{
1359
Trond Myklebust7ebeb7f2016-09-22 13:39:20 -04001360 if (!nfs4_valid_open_stateid(state))
1361 return 0;
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001362 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 Myklebust7eff03a2008-12-23 15:21:43 -05001368 set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags);
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001369 set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state);
1370 return 1;
1371}
1372
Trond Myklebust4f14c192014-02-12 19:15:06 -05001373int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state)
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001374{
Trond Myklebust7ebeb7f2016-09-22 13:39:20 -04001375 if (!nfs4_valid_open_stateid(state))
1376 return 0;
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001377 set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags);
1378 clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags);
Trond Myklebust7eff03a2008-12-23 15:21:43 -05001379 set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags);
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001380 set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
1381 return 1;
1382}
1383
Trond Myklebust5d422302013-03-14 16:57:48 -04001384int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state)
Trond Myklebust0400a6b2011-03-09 16:00:53 -05001385{
1386 struct nfs_client *clp = server->nfs_client;
1387
Trond Myklebust7ebeb7f2016-09-22 13:39:20 -04001388 if (!nfs4_state_mark_reclaim_nograce(clp, state))
Trond Myklebust5d422302013-03-14 16:57:48 -04001389 return -EBADF;
Trond Myklebust994b15b2018-09-05 14:07:14 -04001390 nfs_inode_find_delegation_state_and_recover(state->inode,
1391 &state->stateid);
Trond Myklebustcc0a9842012-05-28 15:12:27 -04001392 dprintk("%s: scheduling stateid recovery for server %s\n", __func__,
1393 clp->cl_hostname);
Trond Myklebust0400a6b2011-03-09 16:00:53 -05001394 nfs4_schedule_state_manager(clp);
Trond Myklebust5d422302013-03-14 16:57:48 -04001395 return 0;
Trond Myklebust0400a6b2011-03-09 16:00:53 -05001396}
Andy Adamson9cb81962012-03-07 10:49:41 -05001397EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery);
Trond Myklebust0400a6b2011-03-09 16:00:53 -05001398
Trond Myklebust6c2d8f82016-09-22 13:39:07 -04001399static struct nfs4_lock_state *
1400nfs_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 Myklebust42c304c2019-10-26 10:16:15 -04001408 if (nfs4_stateid_match_or_older(&pos->ls_stateid, stateid))
Trond Myklebust6c2d8f82016-09-22 13:39:07 -04001409 return pos;
1410 }
1411 return NULL;
1412}
1413
1414static 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 Myklebusta1d0b5e2012-03-05 19:56:44 -05001428void 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 Myklebust0de43972018-09-02 15:57:01 -04001437 rcu_read_lock();
1438 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05001439 state = ctx->state;
1440 if (state == NULL)
1441 continue;
Trond Myklebust42c304c2019-10-26 10:16:15 -04001442 if (nfs4_stateid_match_or_older(&state->stateid, stateid) &&
Trond Myklebust7ebeb7f2016-09-22 13:39:20 -04001443 nfs4_state_mark_reclaim_nograce(clp, state)) {
Trond Myklebust6c2d8f82016-09-22 13:39:07 -04001444 found = true;
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05001445 continue;
Trond Myklebust6c2d8f82016-09-22 13:39:07 -04001446 }
Trond Myklebust42c304c2019-10-26 10:16:15 -04001447 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1448 nfs4_stateid_match_or_older(&state->open_stateid, stateid) &&
Trond Myklebust46280d92017-11-06 15:28:11 -05001449 nfs4_state_mark_reclaim_nograce(clp, state)) {
1450 found = true;
1451 continue;
1452 }
Trond Myklebust7ebeb7f2016-09-22 13:39:20 -04001453 if (nfs_state_lock_state_matches_stateid(state, stateid) &&
1454 nfs4_state_mark_reclaim_nograce(clp, state))
Trond Myklebust6c2d8f82016-09-22 13:39:07 -04001455 found = true;
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05001456 }
Trond Myklebust0de43972018-09-02 15:57:01 -04001457 rcu_read_unlock();
Trond Myklebust6c2d8f82016-09-22 13:39:07 -04001458
1459 nfs_inode_find_delegation_state_and_recover(inode, stateid);
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05001460 if (found)
1461 nfs4_schedule_state_manager(clp);
1462}
1463
Trond Myklebust86dbd08b2019-07-22 09:44:04 +01001464static void nfs4_state_mark_open_context_bad(struct nfs4_state *state, int err)
Trond Myklebustc58c8442013-03-18 19:45:14 -04001465{
1466 struct inode *inode = state->inode;
1467 struct nfs_inode *nfsi = NFS_I(inode);
1468 struct nfs_open_context *ctx;
1469
Trond Myklebust0de43972018-09-02 15:57:01 -04001470 rcu_read_lock();
1471 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
Trond Myklebustc58c8442013-03-18 19:45:14 -04001472 if (ctx->state != state)
1473 continue;
1474 set_bit(NFS_CONTEXT_BAD, &ctx->flags);
Trond Myklebust86dbd08b2019-07-22 09:44:04 +01001475 pr_warn("NFSv4: state recovery failed for open file %pd2, "
1476 "error = %d\n", ctx->dentry, err);
Trond Myklebustc58c8442013-03-18 19:45:14 -04001477 }
Trond Myklebust0de43972018-09-02 15:57:01 -04001478 rcu_read_unlock();
Trond Myklebustc58c8442013-03-18 19:45:14 -04001479}
1480
Trond Myklebust5d422302013-03-14 16:57:48 -04001481static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error)
1482{
1483 set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags);
Trond Myklebust86dbd08b2019-07-22 09:44:04 +01001484 nfs4_state_mark_open_context_bad(state, error);
Trond Myklebust5d422302013-03-14 16:57:48 -04001485}
1486
Trond Myklebusta1d0b5e2012-03-05 19:56:44 -05001487
Trond Myklebust02860012008-12-23 15:21:40 -05001488static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489{
1490 struct inode *inode = state->inode;
Trond Myklebust19e03c52008-12-23 15:21:44 -05001491 struct nfs_inode *nfsi = NFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492 struct file_lock *fl;
NeilBrowndce26302017-12-13 09:57:09 +11001493 struct nfs4_lock_state *lsp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 int status = 0;
Jeff Layton5263e312015-01-16 15:05:55 -05001495 struct file_lock_context *flctx = inode->i_flctx;
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05001496 struct list_head *list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05001498 if (flctx == NULL)
Trond Myklebust3f09df72009-06-17 13:23:00 -07001499 return 0;
1500
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05001501 list = &flctx->flc_posix;
1502
Trond Myklebust3f09df72009-06-17 13:23:00 -07001503 /* Guard against delegation returns and new lock/unlock calls */
Trond Myklebust19e03c52008-12-23 15:21:44 -05001504 down_write(&nfsi->rwsem);
Jeff Layton6109c852015-01-16 15:05:57 -05001505 spin_lock(&flctx->flc_lock);
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05001506restart:
1507 list_for_each_entry(fl, list, fl_list) {
Jeff Layton5263e312015-01-16 15:05:55 -05001508 if (nfs_file_open_context(fl->fl_file)->state != state)
1509 continue;
Jeff Layton6109c852015-01-16 15:05:57 -05001510 spin_unlock(&flctx->flc_lock);
Jeff Layton5263e312015-01-16 15:05:55 -05001511 status = ops->recover_lock(state, fl);
1512 switch (status) {
1513 case 0:
1514 break;
Trond Myklebust67e7b522019-08-07 07:31:27 -04001515 case -ETIMEDOUT:
Jeff Layton5263e312015-01-16 15:05:55 -05001516 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. Silvadf561f662020-08-23 17:36:59 -05001531 fallthrough;
Jeff Layton5263e312015-01-16 15:05:55 -05001532 case -ENOMEM:
1533 case -NFS4ERR_DENIED:
1534 case -NFS4ERR_RECLAIM_BAD:
1535 case -NFS4ERR_RECLAIM_CONFLICT:
NeilBrowndce26302017-12-13 09:57:09 +11001536 lsp = fl->fl_u.nfs4_fl.owner;
1537 if (lsp)
1538 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
Jeff Layton5263e312015-01-16 15:05:55 -05001539 status = 0;
1540 }
Jeff Layton6109c852015-01-16 15:05:57 -05001541 spin_lock(&flctx->flc_lock);
Jeff Layton5263e312015-01-16 15:05:55 -05001542 }
Jeff Laytonbd61e0a2015-01-16 15:05:55 -05001543 if (list == &flctx->flc_posix) {
1544 list = &flctx->flc_flock;
1545 goto restart;
1546 }
Jeff Layton6109c852015-01-16 15:05:57 -05001547 spin_unlock(&flctx->flc_lock);
Trond Myklebust965b5d62009-06-17 13:22:59 -07001548out:
Trond Myklebust19e03c52008-12-23 15:21:44 -05001549 up_write(&nfsi->rwsem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 return status;
1551}
1552
Anna Schumaker80f42362018-09-20 16:12:13 -04001553#ifdef CONFIG_NFS_V4_2
1554static void nfs42_complete_copies(struct nfs4_state_owner *sp, struct nfs4_state *state)
1555{
1556 struct nfs4_copy_state *copy;
1557
Olga Kornievskaia0e65a322019-06-14 14:38:40 -04001558 if (!test_bit(NFS_CLNT_DST_SSC_COPY_STATE, &state->flags) &&
1559 !test_bit(NFS_CLNT_SRC_SSC_COPY_STATE, &state->flags))
Anna Schumaker80f42362018-09-20 16:12:13 -04001560 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 Kornievskaia0e65a322019-06-14 14:38:40 -04001564 if ((test_bit(NFS_CLNT_DST_SSC_COPY_STATE, &state->flags) &&
1565 !nfs4_stateid_match_other(&state->stateid,
1566 &copy->parent_dst_state->stateid)))
1567 continue;
Anna Schumaker80f42362018-09-20 16:12:13 -04001568 copy->flags = 1;
Olga Kornievskaia0e65a322019-06-14 14:38:40 -04001569 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(&copy->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 &copy->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(&copy->completion);
Anna Schumaker80f42362018-09-20 16:12:13 -04001584 }
1585 spin_unlock(&sp->so_server->nfs_client->cl_lock);
1586}
1587#else /* !CONFIG_NFS_V4_2 */
1588static 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 Schumakercb7a8382018-09-11 16:23:46 -04001594static 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 Lever21f86d22019-11-05 11:04:13 -05001611 trace_nfs4_state_lock_reclaim(state, lock);
Anna Schumakercb7a8382018-09-11 16:23:46 -04001612 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 Schumaker80f42362018-09-20 16:12:13 -04001618 nfs42_complete_copies(sp, state);
Anna Schumakercb7a8382018-09-11 16:23:46 -04001619 clear_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags);
1620 return status;
1621}
1622
Trond Myklebust02860012008-12-23 15:21:40 -05001623static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624{
1625 struct nfs4_state *state;
Trond Myklebustc34fae02019-07-22 09:54:29 +01001626 unsigned int loop = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 int status = 0;
Olga Kornievskaia0b9018b2019-10-08 16:34:36 -04001628#ifdef CONFIG_NFS_V4_2
1629 bool found_ssc_copy_state = false;
1630#endif /* CONFIG_NFS_V4_2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631
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 Myklebustfe1d8192008-12-23 15:21:43 -05001640 spin_lock(&sp->so_lock);
Trond Myklebustabbec2da2014-06-05 10:42:37 -04001641 raw_write_seqcount_begin(&sp->so_reclaim_seqcount);
Trond Myklebustc137afa2013-02-07 14:41:11 -05001642restart:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 list_for_each_entry(state, &sp->so_states, open_states) {
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001644 if (!test_and_clear_bit(ops->state_flag_bit, &state->flags))
1645 continue;
Trond Myklebust5d422302013-03-14 16:57:48 -04001646 if (!nfs4_valid_open_stateid(state))
1647 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 if (state->state == 0)
1649 continue;
Olga Kornievskaia0b9018b2019-10-08 16:34:36 -04001650#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 Myklebustace9fad2018-09-02 19:19:07 -04001657 refcount_inc(&state->count);
Trond Myklebustfe1d8192008-12-23 15:21:43 -05001658 spin_unlock(&sp->so_lock);
Anna Schumakercb7a8382018-09-11 16:23:46 -04001659 status = __nfs4_reclaim_open_state(sp, state, ops);
Anna Schumakercb7a8382018-09-11 16:23:46 -04001660
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661 switch (status) {
Anna Schumaker35a61602018-09-11 16:23:47 -04001662 default:
Trond Myklebustc34fae02019-07-22 09:54:29 +01001663 if (status >= 0) {
1664 loop = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 break;
Trond Myklebustc34fae02019-07-22 09:54:29 +01001666 }
Anna Schumaker35a61602018-09-11 16:23:47 -04001667 printk(KERN_ERR "NFS: %s: unhandled error %d\n", __func__, status);
Gustavo A. R. Silvadf561f662020-08-23 17:36:59 -05001668 fallthrough;
Anna Schumaker35a61602018-09-11 16:23:47 -04001669 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 Myklebustc34fae02019-07-22 09:54:29 +01001680 if (loop++ < 10) {
1681 set_bit(ops->state_flag_bit, &state->flags);
1682 break;
1683 }
Gustavo A. R. Silvadf561f662020-08-23 17:36:59 -05001684 fallthrough;
Anna Schumaker35a61602018-09-11 16:23:47 -04001685 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. Silvadf561f662020-08-23 17:36:59 -05001696 fallthrough;
Anna Schumaker35a61602018-09-11 16:23:47 -04001697 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 Myklebust67e7b522019-08-07 07:31:27 -04001702 case -ETIMEDOUT:
Anna Schumaker35a61602018-09-11 16:23:47 -04001703 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 }
Trond Myklebustfe1d8192008-12-23 15:21:43 -05001705 nfs4_put_open_state(state);
Trond Myklebustc137afa2013-02-07 14:41:11 -05001706 spin_lock(&sp->so_lock);
Trond Myklebustfe1d8192008-12-23 15:21:43 -05001707 goto restart;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708 }
Trond Myklebustabbec2da2014-06-05 10:42:37 -04001709 raw_write_seqcount_end(&sp->so_reclaim_seqcount);
Trond Myklebustfe1d8192008-12-23 15:21:43 -05001710 spin_unlock(&sp->so_lock);
Olga Kornievskaia0b9018b2019-10-08 16:34:36 -04001711#ifdef CONFIG_NFS_V4_2
1712 if (found_ssc_copy_state)
1713 return -EIO;
1714#endif /* CONFIG_NFS_V4_2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 return 0;
1716out_err:
Trond Myklebustfe1d8192008-12-23 15:21:43 -05001717 nfs4_put_open_state(state);
Trond Myklebustc137afa2013-02-07 14:41:11 -05001718 spin_lock(&sp->so_lock);
Trond Myklebustabbec2da2014-06-05 10:42:37 -04001719 raw_write_seqcount_end(&sp->so_reclaim_seqcount);
Trond Myklebustc137afa2013-02-07 14:41:11 -05001720 spin_unlock(&sp->so_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 return status;
1722}
1723
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001724static 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 Myklebust4b44b402011-12-09 16:31:52 -05001732 spin_lock(&state->state_lock);
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001733 list_for_each_entry(lock, &state->lock_states, ls_locks) {
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001734 lock->ls_seqid.flags = 0;
Trond Myklebust795a88c2012-09-10 13:26:49 -04001735 clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags);
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001736 }
Trond Myklebust4b44b402011-12-09 16:31:52 -05001737 spin_unlock(&state->state_lock);
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001738}
1739
Chuck Lever24d292b2010-12-24 01:32:43 +00001740static void nfs4_reset_seqids(struct nfs_server *server,
1741 int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state))
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001742{
Chuck Lever24d292b2010-12-24 01:32:43 +00001743 struct nfs_client *clp = server->nfs_client;
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001744 struct nfs4_state_owner *sp;
Trond Myklebust9f958ab2007-07-02 13:58:33 -04001745 struct rb_node *pos;
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001746 struct nfs4_state *state;
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001747
Chuck Lever24d292b2010-12-24 01:32:43 +00001748 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 Myklebustcee54fc2005-10-18 14:20:12 -07001753 sp->so_seqid.flags = 0;
Trond Myklebustec073422005-10-20 14:22:47 -07001754 spin_lock(&sp->so_lock);
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001755 list_for_each_entry(state, &sp->so_states, open_states) {
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001756 if (mark_reclaim(clp, state))
1757 nfs4_clear_open_state(state);
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001758 }
Trond Myklebustec073422005-10-20 14:22:47 -07001759 spin_unlock(&sp->so_lock);
Trond Myklebustcee54fc2005-10-18 14:20:12 -07001760 }
Chuck Lever24d292b2010-12-24 01:32:43 +00001761 spin_unlock(&clp->cl_lock);
1762}
1763
1764static 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 Myklebustcee54fc2005-10-18 14:20:12 -07001773}
1774
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001775static 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 Myklebust0048fdd2017-05-04 13:44:04 -04001782static int nfs4_reclaim_complete(struct nfs_client *clp,
Trond Myklebust965e9c22013-05-20 11:05:17 -04001783 const struct nfs4_state_recovery_ops *ops,
NeilBrowna52458b2018-12-03 11:30:31 +11001784 const struct cred *cred)
Ricardo Labiagafce5c832009-12-05 16:08:41 -05001785{
1786 /* Notify the server we're done reclaiming our state */
1787 if (ops->reclaim_complete)
Trond Myklebust0048fdd2017-05-04 13:44:04 -04001788 return ops->reclaim_complete(clp, cred);
1789 return 0;
Ricardo Labiagafce5c832009-12-05 16:08:41 -05001790}
1791
Chuck Lever24d292b2010-12-24 01:32:43 +00001792static void nfs4_clear_reclaim_server(struct nfs_server *server)
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001793{
Chuck Lever24d292b2010-12-24 01:32:43 +00001794 struct nfs_client *clp = server->nfs_client;
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001795 struct nfs4_state_owner *sp;
1796 struct rb_node *pos;
1797 struct nfs4_state *state;
1798
Chuck Lever24d292b2010-12-24 01:32:43 +00001799 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 Myklebustb79a4a12008-12-23 15:21:41 -05001804 spin_lock(&sp->so_lock);
1805 list_for_each_entry(state, &sp->so_states, open_states) {
Chuck Lever24d292b2010-12-24 01:32:43 +00001806 if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT,
1807 &state->flags))
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001808 continue;
1809 nfs4_state_mark_reclaim_nograce(clp, state);
1810 }
1811 spin_unlock(&sp->so_lock);
1812 }
Chuck Lever24d292b2010-12-24 01:32:43 +00001813 spin_unlock(&clp->cl_lock);
1814}
1815
1816static 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 Myklebustb79a4a12008-12-23 15:21:41 -05001827
1828 nfs_delegation_reap_unclaimed(clp);
Trond Myklebust6eaa6142010-10-04 17:59:08 -04001829 return 1;
1830}
1831
1832static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp)
1833{
Trond Myklebust965e9c22013-05-20 11:05:17 -04001834 const struct nfs4_state_recovery_ops *ops;
NeilBrowna52458b2018-12-03 11:30:31 +11001835 const struct cred *cred;
Trond Myklebust0048fdd2017-05-04 13:44:04 -04001836 int err;
Trond Myklebust965e9c22013-05-20 11:05:17 -04001837
Trond Myklebust6eaa6142010-10-04 17:59:08 -04001838 if (!nfs4_state_clear_reclaim_reboot(clp))
1839 return;
Trond Myklebust965e9c22013-05-20 11:05:17 -04001840 ops = clp->cl_mvops->reboot_recovery_ops;
Chuck Lever73d8bde2013-07-24 12:28:37 -04001841 cred = nfs4_get_clid_cred(clp);
Trond Myklebust0048fdd2017-05-04 13:44:04 -04001842 err = nfs4_reclaim_complete(clp, ops, cred);
NeilBrowna52458b2018-12-03 11:30:31 +11001843 put_cred(cred);
Trond Myklebust0048fdd2017-05-04 13:44:04 -04001844 if (err == -NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
1845 set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state);
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001846}
1847
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001848static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp)
1849{
Trond Myklebust45870d62016-09-22 13:38:59 -04001850 nfs_mark_test_expired_all_delegations(clp);
Trond Myklebustb79a4a12008-12-23 15:21:41 -05001851 nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce);
1852}
1853
Trond Myklebust4f7cdf12009-12-03 15:53:20 -05001854static int nfs4_recovery_handle_error(struct nfs_client *clp, int error)
Trond Myklebuste598d842008-12-23 15:21:42 -05001855{
1856 switch (error) {
Anna Schumaker000d3f92018-09-11 16:23:48 -04001857 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 Myklebuste598d842008-12-23 15:21:42 -05001889 }
Trond Myklebustcc0a9842012-05-28 15:12:27 -04001890 dprintk("%s: handled error %d for server %s\n", __func__, error,
1891 clp->cl_hostname);
Trond Myklebust4f38e4a2011-12-01 16:31:34 -05001892 return 0;
Trond Myklebuste598d842008-12-23 15:21:42 -05001893}
1894
Trond Myklebust02860012008-12-23 15:21:40 -05001895static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896{
Chuck Lever24d292b2010-12-24 01:32:43 +00001897 struct nfs4_state_owner *sp;
1898 struct nfs_server *server;
Trond Myklebust9f958ab2007-07-02 13:58:33 -04001899 struct rb_node *pos;
Trond Myklebustc77e2282019-08-03 10:11:27 -04001900 LIST_HEAD(freeme);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 int status = 0;
1902
Trond Myklebust7eff03a2008-12-23 15:21:43 -05001903restart:
Chuck Lever24d292b2010-12-24 01:32:43 +00001904 rcu_read_lock();
1905 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
Trond Myklebustc77e2282019-08-03 10:11:27 -04001906 nfs4_purge_state_owners(server, &freeme);
Chuck Lever24d292b2010-12-24 01:32:43 +00001907 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 Myklebust4a0954e2015-10-02 11:11:16 -04001916 if (!atomic_inc_not_zero(&sp->so_count))
1917 continue;
Chuck Lever24d292b2010-12-24 01:32:43 +00001918 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 Myklebustdf817ba32014-09-27 17:41:51 -04001925 status = nfs4_recovery_handle_error(clp, status);
1926 return (status != 0) ? status : -EAGAIN;
Chuck Lever24d292b2010-12-24 01:32:43 +00001927 }
1928
Trond Myklebust7eff03a2008-12-23 15:21:43 -05001929 nfs4_put_state_owner(sp);
Chuck Lever24d292b2010-12-24 01:32:43 +00001930 goto restart;
Trond Myklebust7eff03a2008-12-23 15:21:43 -05001931 }
Chuck Lever24d292b2010-12-24 01:32:43 +00001932 spin_unlock(&clp->cl_lock);
Trond Myklebust02860012008-12-23 15:21:40 -05001933 }
Chuck Lever24d292b2010-12-24 01:32:43 +00001934 rcu_read_unlock();
Trond Myklebustc77e2282019-08-03 10:11:27 -04001935 nfs4_free_state_owners(&freeme);
Trond Myklebustdf817ba32014-09-27 17:41:51 -04001936 return 0;
Trond Myklebust02860012008-12-23 15:21:40 -05001937}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938
Trond Myklebust02860012008-12-23 15:21:40 -05001939static int nfs4_check_lease(struct nfs_client *clp)
1940{
NeilBrowna52458b2018-12-03 11:30:31 +11001941 const struct cred *cred;
Trond Myklebustc48f4f32010-06-16 09:52:27 -04001942 const struct nfs4_state_maintenance_ops *ops =
1943 clp->cl_mvops->state_renewal_ops;
Trond Myklebust4f38e4a2011-12-01 16:31:34 -05001944 int status;
Trond Myklebust02860012008-12-23 15:21:40 -05001945
Trond Myklebust0f605b562008-12-23 15:21:42 -05001946 /* Is the client already known to have an expired lease? */
1947 if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
1948 return 0;
NeilBrownf15e1e82018-12-03 11:30:30 +11001949 cred = ops->get_state_renewal_cred(clp);
Trond Myklebust0f605b562008-12-23 15:21:42 -05001950 if (cred == NULL) {
Chuck Lever73d8bde2013-07-24 12:28:37 -04001951 cred = nfs4_get_clid_cred(clp);
Trond Myklebust4f38e4a2011-12-01 16:31:34 -05001952 status = -ENOKEY;
Trond Myklebust0f605b562008-12-23 15:21:42 -05001953 if (cred == NULL)
1954 goto out;
Trond Myklebust02860012008-12-23 15:21:40 -05001955 }
Benny Halevy8e69514f2009-04-01 09:22:45 -04001956 status = ops->renew_lease(clp, cred);
NeilBrowna52458b2018-12-03 11:30:31 +11001957 put_cred(cred);
Trond Myklebustbc7a05c2013-04-08 17:50:28 -04001958 if (status == -ETIMEDOUT) {
1959 set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
1960 return 0;
1961 }
Trond Myklebust0f605b562008-12-23 15:21:42 -05001962out:
Trond Myklebust4f7cdf12009-12-03 15:53:20 -05001963 return nfs4_recovery_handle_error(clp, status);
Trond Myklebust02860012008-12-23 15:21:40 -05001964}
1965
Andy Adamson47b803c2012-10-01 20:42:32 -04001966/* 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 Myklebust2a6ee6a2012-05-25 15:00:06 -04001968 */
1969static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status)
1970{
1971 switch (status) {
Trond Myklebust89a21732012-05-25 15:00:06 -04001972 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 Adamson47b803c2012-10-01 20:42:32 -04001977 clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state);
1978 break;
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04001979 case -NFS4ERR_STALE_CLIENTID:
1980 clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state);
Andy Adamson47b803c2012-10-01 20:42:32 -04001981 nfs4_state_start_reclaim_reboot(clp);
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04001982 break;
Chuck Leverde734832012-07-11 16:30:50 -04001983 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 Myklebust2a6ee6a2012-05-25 15:00:06 -04001989 case -EACCES:
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04001990 case -NFS4ERR_DELAY:
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04001991 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 Myklebustcc0a9842012-05-28 15:12:27 -04001998 dprintk("%s: exit with error %d for server %s\n",
1999 __func__, -EPROTONOSUPPORT, clp->cl_hostname);
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04002000 return -EPROTONOSUPPORT;
Olga Kornievskaiaea027cb2021-11-15 16:30:40 -05002001 case -ENOSPC:
2002 if (clp->cl_cons_state == NFS_CS_SESSION_INITING)
2003 nfs_mark_client_ready(clp, -EIO);
2004 return -EIO;
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04002005 case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery
2006 * in nfs4_exchange_id */
2007 default:
Trond Myklebustcc0a9842012-05-28 15:12:27 -04002008 dprintk("%s: exit with error %d for server %s\n", __func__,
2009 status, clp->cl_hostname);
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04002010 return status;
2011 }
2012 set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
Trond Myklebustcc0a9842012-05-28 15:12:27 -04002013 dprintk("%s: handled error %d for server %s\n", __func__, status,
2014 clp->cl_hostname);
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04002015 return 0;
2016}
2017
Trond Myklebustb42353f2012-06-05 11:19:47 -04002018static int nfs4_establish_lease(struct nfs_client *clp)
Trond Myklebust02860012008-12-23 15:21:40 -05002019{
NeilBrowna52458b2018-12-03 11:30:31 +11002020 const struct cred *cred;
Trond Myklebustc48f4f32010-06-16 09:52:27 -04002021 const struct nfs4_state_recovery_ops *ops =
2022 clp->cl_mvops->reboot_recovery_ops;
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04002023 int status;
Trond Myklebust02860012008-12-23 15:21:40 -05002024
Trond Myklebust8aafd2f2018-08-11 11:52:38 -04002025 status = nfs4_begin_drain_session(clp);
2026 if (status != 0)
2027 return status;
Chuck Lever73d8bde2013-07-24 12:28:37 -04002028 cred = nfs4_get_clid_cred(clp);
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04002029 if (cred == NULL)
2030 return -ENOENT;
2031 status = ops->establish_clid(clp, cred);
NeilBrowna52458b2018-12-03 11:30:31 +11002032 put_cred(cred);
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04002033 if (status != 0)
Trond Myklebustb42353f2012-06-05 11:19:47 -04002034 return status;
2035 pnfs_destroy_all_layouts(clp);
2036 return 0;
2037}
2038
Chuck Lever6bbb4ae82012-07-11 16:30:59 -04002039/*
2040 * Returns zero or a negative errno. NFS4ERR values are converted
2041 * to local errno values.
2042 */
Trond Myklebustb42353f2012-06-05 11:19:47 -04002043static int nfs4_reclaim_lease(struct nfs_client *clp)
2044{
2045 int status;
2046
2047 status = nfs4_establish_lease(clp);
2048 if (status < 0)
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04002049 return nfs4_handle_reclaim_lease_error(clp, status);
Trond Myklebustb42353f2012-06-05 11:19:47 -04002050 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
2059static 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 Myklebust2a6ee6a2012-05-25 15:00:06 -04002069 return 0;
Trond Myklebust02860012008-12-23 15:21:40 -05002070}
2071
Chuck Leverc9fdeb22013-10-17 14:13:02 -04002072/*
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 */
NeilBrowna52458b2018-12-03 11:30:31 +11002079static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred)
Chuck Leverc9fdeb22013-10-17 14:13:02 -04002080{
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 Howells2b0143b2015-03-17 22:25:59 +00002100 inode = d_inode(server->super->s_root);
Chuck Leverc9fdeb22013-10-17 14:13:02 -04002101 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 Myklebust8aafd2f2018-08-11 11:52:38 -04002115 status = nfs4_begin_drain_session(clp);
Wenwen Wang1e672e32019-08-20 22:21:21 -05002116 if (status != 0) {
2117 result = status;
2118 goto out;
2119 }
Chuck Leverc9fdeb22013-10-17 14:13:02 -04002120
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
2131out:
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 */
2146static 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;
NeilBrowna52458b2018-12-03 11:30:31 +11002151 const struct cred *cred;
Chuck Leverc9fdeb22013-10-17 14:13:02 -04002152
2153 dprintk("%s: migration reported on \"%s\"\n", __func__,
2154 clp->cl_hostname);
2155
NeilBrownf15e1e82018-12-03 11:30:30 +11002156 cred = ops->get_state_renewal_cred(clp);
Chuck Leverc9fdeb22013-10-17 14:13:02 -04002157 if (cred == NULL)
2158 return -NFS4ERR_NOENT;
2159
2160 clp->cl_mig_gen++;
2161restart:
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) {
NeilBrowna52458b2018-12-03 11:30:31 +11002177 put_cred(cred);
Chuck Leverc9fdeb22013-10-17 14:13:02 -04002178 return status;
2179 }
2180 goto restart;
2181 }
2182 rcu_read_unlock();
NeilBrowna52458b2018-12-03 11:30:31 +11002183 put_cred(cred);
Chuck Leverc9fdeb22013-10-17 14:13:02 -04002184 return 0;
2185}
2186
Chuck Leverb7f7a662013-10-17 14:13:35 -04002187/*
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 */
2192static 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;
NeilBrowna52458b2018-12-03 11:30:31 +11002197 const struct cred *cred;
Chuck Leverb7f7a662013-10-17 14:13:35 -04002198
2199 dprintk("%s: lease moved reported on \"%s\"\n", __func__,
2200 clp->cl_hostname);
2201
NeilBrownf15e1e82018-12-03 11:30:30 +11002202 cred = ops->get_state_renewal_cred(clp);
Chuck Leverb7f7a662013-10-17 14:13:35 -04002203 if (cred == NULL)
2204 return -NFS4ERR_NOENT;
2205
2206 clp->cl_mig_gen++;
2207restart:
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 Howells2b0143b2015-03-17 22:25:59 +00002219 inode = d_inode(server->super->s_root);
Chuck Leverb7f7a662013-10-17 14:13:35 -04002220 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
2229out:
NeilBrowna52458b2018-12-03 11:30:31 +11002230 put_cred(cred);
Chuck Leverb7f7a662013-10-17 14:13:35 -04002231 return 0;
2232}
2233
Chuck Lever05f4c352012-09-14 17:24:32 -04002234/**
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 */
2247int 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 Lever05f4c352012-09-14 17:24:32 -04002252 struct rpc_clnt *clnt;
NeilBrowna52458b2018-12-03 11:30:31 +11002253 const struct cred *cred;
Chuck Lever4edaa302013-03-16 15:56:20 -04002254 int i, status;
Chuck Lever05f4c352012-09-14 17:24:32 -04002255
2256 dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname);
2257
Chuck Lever05f4c352012-09-14 17:24:32 -04002258 clnt = clp->cl_rpcclient;
Chuck Lever05f4c352012-09-14 17:24:32 -04002259 i = 0;
2260
2261 mutex_lock(&nfs_clid_init_mutex);
Chuck Lever05f4c352012-09-14 17:24:32 -04002262again:
Trond Myklebustea33e6c2013-04-05 13:22:50 -04002263 status = -ENOENT;
Chuck Lever73d8bde2013-07-24 12:28:37 -04002264 cred = nfs4_get_clid_cred(clp);
Chuck Lever05f4c352012-09-14 17:24:32 -04002265 if (cred == NULL)
2266 goto out_unlock;
2267
2268 status = ops->detect_trunking(clp, result, cred);
NeilBrowna52458b2018-12-03 11:30:31 +11002269 put_cred(cred);
Chuck Lever05f4c352012-09-14 17:24:32 -04002270 switch (status) {
2271 case 0:
Trond Myklebust898fc112017-06-21 10:16:56 -04002272 case -EINTR:
2273 case -ERESTARTSYS:
Chuck Lever05f4c352012-09-14 17:24:32 -04002274 break;
Chuck Lever05f4c352012-09-14 17:24:32 -04002275 case -ETIMEDOUT:
Trond Myklebust150e7262014-03-18 14:23:11 -04002276 if (clnt->cl_softrtry)
2277 break;
Gustavo A. R. Silvadf561f662020-08-23 17:36:59 -05002278 fallthrough;
Trond Myklebust150e7262014-03-18 14:23:11 -04002279 case -NFS4ERR_DELAY:
Chuck Lever05f4c352012-09-14 17:24:32 -04002280 case -EAGAIN:
2281 ssleep(1);
Gustavo A. R. Silvadf561f662020-08-23 17:36:59 -05002282 fallthrough;
Trond Myklebust202c3122013-01-18 22:56:23 -05002283 case -NFS4ERR_STALE_CLIENTID:
Chuck Lever05f4c352012-09-14 17:24:32 -04002284 dprintk("NFS: %s after status %d, retrying\n",
2285 __func__, status);
2286 goto again;
Chuck Lever4edaa302013-03-16 15:56:20 -04002287 case -EACCES:
Chuck Leverd688f7b2013-07-24 12:28:28 -04002288 if (i++ == 0) {
2289 nfs4_root_machine_cred(clp);
2290 goto again;
2291 }
Jeff Layton6d769f12013-11-13 09:08:21 -05002292 if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX)
Chuck Lever4edaa302013-03-16 15:56:20 -04002293 break;
Gustavo A. R. Silvadf561f662020-08-23 17:36:59 -05002294 fallthrough;
Chuck Lever05f4c352012-09-14 17:24:32 -04002295 case -NFS4ERR_CLID_INUSE:
2296 case -NFS4ERR_WRONGSEC:
Jeff Layton6d769f12013-11-13 09:08:21 -05002297 /* 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 Lever79d852b2013-04-22 15:42:48 -04002302 clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX);
Chuck Lever05f4c352012-09-14 17:24:32 -04002303 if (IS_ERR(clnt)) {
2304 status = PTR_ERR(clnt);
2305 break;
2306 }
Trond Myklebustb193d59a2013-04-04 15:55:00 -04002307 /* 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 Lever05f4c352012-09-14 17:24:32 -04002314 goto again;
2315
2316 case -NFS4ERR_MINOR_VERS_MISMATCH:
2317 status = -EPROTONOSUPPORT;
2318 break;
2319
2320 case -EKEYEXPIRED:
Chuck Lever05f4c352012-09-14 17:24:32 -04002321 case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery
2322 * in nfs4_exchange_id */
2323 status = -EKEYEXPIRED;
Trond Myklebustea33e6c2013-04-05 13:22:50 -04002324 break;
2325 default:
2326 pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n",
2327 __func__, status);
2328 status = -EIO;
Chuck Lever05f4c352012-09-14 17:24:32 -04002329 }
2330
2331out_unlock:
2332 mutex_unlock(&nfs_clid_init_mutex);
Chuck Lever05f4c352012-09-14 17:24:32 -04002333 dprintk("NFS: %s: status = %d\n", __func__, status);
2334 return status;
2335}
2336
Andy Adamson76db6d92009-04-01 09:22:38 -04002337#ifdef CONFIG_NFS_V4_1
Trond Myklebust9f594792012-05-27 13:02:53 -04002338void nfs4_schedule_session_recovery(struct nfs4_session *session, int err)
Trond Myklebust0400a6b2011-03-09 16:00:53 -05002339{
Trond Myklebust444f72f2011-05-26 14:26:35 -04002340 struct nfs_client *clp = session->clp;
2341
Trond Myklebust9f594792012-05-27 13:02:53 -04002342 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 Myklebustd94cbf62016-12-04 19:34:38 -05002349 nfs4_schedule_state_manager(clp);
Trond Myklebust0400a6b2011-03-09 16:00:53 -05002350}
Andy Adamsoncbdabc72011-03-01 01:34:20 +00002351EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery);
Trond Myklebust0400a6b2011-03-09 16:00:53 -05002352
Anna Schumaker3f10a6a2015-07-13 14:01:31 -04002353void nfs41_notify_server(struct nfs_client *clp)
Trond Myklebustac074832012-11-21 09:06:11 -05002354{
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 Myklebust0f79fd62010-03-02 13:06:21 -05002360static void nfs4_reset_all_state(struct nfs_client *clp)
2361{
2362 if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) {
Chuck Lever2c820d92012-05-21 22:45:33 -04002363 set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state);
Trond Myklebustbe0bfed2012-05-25 16:02:15 -04002364 clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state);
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002365 nfs4_state_start_reclaim_nograce(clp);
Trond Myklebustcc0a9842012-05-28 15:12:27 -04002366 dprintk("%s: scheduling reset of all state for server %s!\n",
2367 __func__, clp->cl_hostname);
Trond Myklebust0400a6b2011-03-09 16:00:53 -05002368 nfs4_schedule_state_manager(clp);
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002369 }
2370}
2371
2372static 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 Myklebustcc0a9842012-05-28 15:12:27 -04002376 dprintk("%s: server %s rebooted!\n", __func__,
2377 clp->cl_hostname);
Trond Myklebust0400a6b2011-03-09 16:00:53 -05002378 nfs4_schedule_state_manager(clp);
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002379 }
2380}
2381
Trond Myklebust8b895ce2015-07-05 15:12:06 -04002382static void nfs41_handle_all_state_revoked(struct nfs_client *clp)
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002383{
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002384 nfs4_reset_all_state(clp);
Trond Myklebustcc0a9842012-05-28 15:12:27 -04002385 dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname);
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002386}
2387
Trond Myklebust8b895ce2015-07-05 15:12:06 -04002388static void nfs41_handle_some_state_revoked(struct nfs_client *clp)
2389{
Trond Myklebust45870d62016-09-22 13:38:59 -04002390 nfs4_state_start_reclaim_nograce(clp);
Trond Myklebust8b895ce2015-07-05 15:12:06 -04002391 nfs4_schedule_state_manager(clp);
2392
2393 dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname);
2394}
2395
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002396static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp)
2397{
Trond Myklebust40992872015-07-05 15:20:53 -04002398 /* FIXME: For now, we destroy all layouts. */
2399 pnfs_destroy_all_layouts(clp);
Scott Mayhew8ca017c2019-05-06 11:59:05 -04002400 nfs_test_expired_all_delegations(clp);
Trond Myklebustcc0a9842012-05-28 15:12:27 -04002401 dprintk("%s: Recallable state revoked on server %s!\n", __func__,
2402 clp->cl_hostname);
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002403}
2404
Weston Andros Adamsona9e64442012-05-24 12:26:37 -04002405static void nfs41_handle_backchannel_fault(struct nfs_client *clp)
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002406{
Trond Myklebustb1352902015-07-05 15:26:58 -04002407 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
2408 nfs4_schedule_state_manager(clp);
2409
Trond Myklebustcc0a9842012-05-28 15:12:27 -04002410 dprintk("%s: server %s declared a backchannel fault\n", __func__,
2411 clp->cl_hostname);
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002412}
2413
Weston Andros Adamsona9e64442012-05-24 12:26:37 -04002414static 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 Myklebust0a014a42016-09-22 13:38:51 -04002421void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags,
2422 bool recovery)
Alexandros Batsakis0629e372009-12-05 13:46:14 -05002423{
2424 if (!flags)
2425 return;
Chuck Lever2c820d92012-05-21 22:45:33 -04002426
2427 dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n",
2428 __func__, clp->cl_hostname, clp->cl_clientid, flags);
Trond Myklebust0a014a42016-09-22 13:38:51 -04002429 /*
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 Lever2c820d92012-05-21 22:45:33 -04002437
Trond Myklebust111d4892011-12-01 16:37:42 -05002438 if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED)
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002439 nfs41_handle_server_reboot(clp);
Trond Myklebust8b895ce2015-07-05 15:12:06 -04002440 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 Leverd1c23312013-10-17 14:13:58 -04002443 SEQ4_STATUS_ADMIN_STATE_REVOKED))
Trond Myklebust8b895ce2015-07-05 15:12:06 -04002444 nfs41_handle_some_state_revoked(clp);
Chuck Leverd1c23312013-10-17 14:13:58 -04002445 if (flags & SEQ4_STATUS_LEASE_MOVED)
2446 nfs4_schedule_lease_moved_recovery(clp);
Trond Myklebust111d4892011-12-01 16:37:42 -05002447 if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED)
Trond Myklebust0f79fd62010-03-02 13:06:21 -05002448 nfs41_handle_recallable_state_revoked(clp);
Trond Myklebust0a014a42016-09-22 13:38:51 -04002449out_recovery:
Weston Andros Adamsona9e64442012-05-24 12:26:37 -04002450 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 Myklebust0f79fd62010-03-02 13:06:21 -05002454 nfs41_handle_cb_path_down(clp);
Alexandros Batsakis0629e372009-12-05 13:46:14 -05002455}
2456
Andy Adamsonc3fad1b2009-04-01 09:22:39 -04002457static int nfs4_reset_session(struct nfs_client *clp)
2458{
NeilBrowna52458b2018-12-03 11:30:31 +11002459 const struct cred *cred;
Andy Adamsonc3fad1b2009-04-01 09:22:39 -04002460 int status;
2461
Trond Myklebust1a47e7a2012-06-05 10:53:38 -04002462 if (!nfs4_has_session(clp))
2463 return 0;
Trond Myklebust8aafd2f2018-08-11 11:52:38 -04002464 status = nfs4_begin_drain_session(clp);
2465 if (status != 0)
2466 return status;
Chuck Lever73d8bde2013-07-24 12:28:37 -04002467 cred = nfs4_get_clid_cred(clp);
Trond Myklebust848f5bd2012-05-25 17:51:23 -04002468 status = nfs4_proc_destroy_session(clp->cl_session, cred);
Trond Myklebustc489ee22013-01-30 13:04:10 -05002469 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 Labiagaf4558482009-12-07 09:16:09 -05002481 status = nfs4_recovery_handle_error(clp, status);
Andy Adamsonc3fad1b2009-04-01 09:22:39 -04002482 goto out;
2483 }
2484
2485 memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN);
Trond Myklebust848f5bd2012-05-25 17:51:23 -04002486 status = nfs4_proc_create_session(clp, cred);
Andy Adamson41f54a52010-01-21 14:54:13 -05002487 if (status) {
Trond Myklebustcc0a9842012-05-28 15:12:27 -04002488 dprintk("%s: session reset failed with status %d for server %s!\n",
2489 __func__, status, clp->cl_hostname);
Trond Myklebustf2c1b512012-05-27 14:46:46 -04002490 status = nfs4_handle_reclaim_lease_error(clp, status);
Andy Adamson41f54a52010-01-21 14:54:13 -05002491 goto out;
2492 }
Trond Myklebustbda197f2012-06-05 10:22:14 -04002493 nfs41_finish_session_reset(clp);
Trond Myklebustcc0a9842012-05-28 15:12:27 -04002494 dprintk("%s: session reset was successful for server %s!\n",
2495 __func__, clp->cl_hostname);
Andy Adamson41f54a52010-01-21 14:54:13 -05002496out:
NeilBrowna52458b2018-12-03 11:30:31 +11002497 put_cred(cred);
Andy Adamsonc3fad1b2009-04-01 09:22:39 -04002498 return status;
2499}
Andy Adamson76db6d92009-04-01 09:22:38 -04002500
Weston Andros Adamsona9e64442012-05-24 12:26:37 -04002501static int nfs4_bind_conn_to_session(struct nfs_client *clp)
2502{
NeilBrowna52458b2018-12-03 11:30:31 +11002503 const struct cred *cred;
Trond Myklebust2cf047c2012-05-25 17:57:41 -04002504 int ret;
2505
Trond Myklebust1a47e7a2012-06-05 10:53:38 -04002506 if (!nfs4_has_session(clp))
2507 return 0;
Trond Myklebust8aafd2f2018-08-11 11:52:38 -04002508 ret = nfs4_begin_drain_session(clp);
2509 if (ret != 0)
2510 return ret;
Chuck Lever73d8bde2013-07-24 12:28:37 -04002511 cred = nfs4_get_clid_cred(clp);
Trond Myklebust2cf047c2012-05-25 17:57:41 -04002512 ret = nfs4_proc_bind_conn_to_session(clp, cred);
NeilBrowna52458b2018-12-03 11:30:31 +11002513 put_cred(cred);
Trond Myklebust43ac5442012-05-27 13:47:21 -04002514 clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state);
Trond Myklebustbf674c82012-05-27 12:53:10 -04002515 switch (ret) {
2516 case 0:
Trond Myklebustcc0a9842012-05-28 15:12:27 -04002517 dprintk("%s: bind_conn_to_session was successful for server %s!\n",
2518 __func__, clp->cl_hostname);
Trond Myklebustbf674c82012-05-27 12:53:10 -04002519 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 Adamsona9e64442012-05-24 12:26:37 -04002528}
Trond Myklebustb5fdf842020-02-18 15:58:31 -05002529
2530static 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 Adamson76db6d92009-04-01 09:22:38 -04002544#else /* CONFIG_NFS_V4_1 */
Andy Adamsonc3fad1b2009-04-01 09:22:39 -04002545static int nfs4_reset_session(struct nfs_client *clp) { return 0; }
Weston Andros Adamsona9e64442012-05-24 12:26:37 -04002546
2547static int nfs4_bind_conn_to_session(struct nfs_client *clp)
2548{
2549 return 0;
2550}
Trond Myklebustb5fdf842020-02-18 15:58:31 -05002551
2552static void nfs4_layoutreturn_any_run(struct nfs_client *clp)
2553{
2554}
Andy Adamson76db6d92009-04-01 09:22:38 -04002555#endif /* CONFIG_NFS_V4_1 */
2556
Trond Myklebuste005e802008-12-23 15:21:48 -05002557static void nfs4_state_manager(struct nfs_client *clp)
Trond Myklebust02860012008-12-23 15:21:40 -05002558{
Trond Myklebust02860012008-12-23 15:21:40 -05002559 int status = 0;
Weston Andros Adamson8ed27d42012-05-29 15:57:59 -04002560 const char *section = "", *section_sep = "";
Trond Myklebust02860012008-12-23 15:21:40 -05002561
Trond Myklebust02860012008-12-23 15:21:40 -05002562 /* Ensure exclusive access to NFSv4 state */
Trond Myklebust47c21992011-04-15 17:34:18 -04002563 do {
Chuck Lever511ba522019-11-05 11:04:07 -05002564 trace_nfs4_state_mgr(clp);
Trond Myklebustaeabb3c2018-11-19 20:11:45 -05002565 clear_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state);
Chuck Lever2c820d92012-05-21 22:45:33 -04002566 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
Weston Andros Adamson8ed27d42012-05-29 15:57:59 -04002567 section = "purge state";
Trond Myklebustb42353f2012-06-05 11:19:47 -04002568 status = nfs4_purge_lease(clp);
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04002569 if (status < 0)
2570 goto out_error;
Trond Myklebustb42353f2012-06-05 11:19:47 -04002571 continue;
Chuck Lever2c820d92012-05-21 22:45:33 -04002572 }
2573
Trond Myklebustb42353f2012-06-05 11:19:47 -04002574 if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
Weston Andros Adamson8ed27d42012-05-29 15:57:59 -04002575 section = "lease expired";
Trond Myklebustb79a4a12008-12-23 15:21:41 -05002576 /* We're going to have to re-establish a clientid */
2577 status = nfs4_reclaim_lease(clp);
Trond Myklebust2a6ee6a2012-05-25 15:00:06 -04002578 if (status < 0)
Trond Myklebustb79a4a12008-12-23 15:21:41 -05002579 goto out_error;
Trond Myklebustb42353f2012-06-05 11:19:47 -04002580 continue;
Trond Myklebuste598d842008-12-23 15:21:42 -05002581 }
2582
Andy Adamsonc3fad1b2009-04-01 09:22:39 -04002583 /* Initialize or reset the session */
Trond Myklebust1a47e7a2012-06-05 10:53:38 -04002584 if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) {
Weston Andros Adamson8ed27d42012-05-29 15:57:59 -04002585 section = "reset session";
Andy Adamson4d643d12009-12-04 15:52:24 -05002586 status = nfs4_reset_session(clp);
Trond Myklebustb6d408b2009-12-03 15:53:22 -05002587 if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
2588 continue;
2589 if (status < 0)
Andy Adamson76db6d92009-04-01 09:22:38 -04002590 goto out_error;
Andy Adamson76db6d92009-04-01 09:22:38 -04002591 }
Trond Myklebustb6d408b2009-12-03 15:53:22 -05002592
Weston Andros Adamsona9e64442012-05-24 12:26:37 -04002593 /* Send BIND_CONN_TO_SESSION */
2594 if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION,
Trond Myklebust1a47e7a2012-06-05 10:53:38 -04002595 &clp->cl_state)) {
Weston Andros Adamson8ed27d42012-05-29 15:57:59 -04002596 section = "bind conn to session";
Weston Andros Adamsona9e64442012-05-24 12:26:37 -04002597 status = nfs4_bind_conn_to_session(clp);
2598 if (status < 0)
2599 goto out_error;
Trond Myklebustbf674c82012-05-27 12:53:10 -04002600 continue;
Weston Andros Adamsona9e64442012-05-24 12:26:37 -04002601 }
2602
Trond Myklebust5df904a2012-11-21 09:22:14 -05002603 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 Kornievskaia8faaa6d2014-09-24 18:11:28 -04002608 continue;
Chuck Leverc9fdeb22013-10-17 14:13:02 -04002609 }
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 Myklebust5df904a2012-11-21 09:22:14 -05002616 }
2617
Chuck Leverb7f7a662013-10-17 14:13:35 -04002618 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 Myklebustb79a4a12008-12-23 15:21:41 -05002625 /* First recover reboot state... */
Trond Myklebuste345e882009-12-03 15:52:41 -05002626 if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) {
Weston Andros Adamson8ed27d42012-05-29 15:57:59 -04002627 section = "reclaim reboot";
Andy Adamson591d71c2009-04-01 09:22:47 -04002628 status = nfs4_do_reclaim(clp,
Trond Myklebustc48f4f32010-06-16 09:52:27 -04002629 clp->cl_mvops->reboot_recovery_ops);
Trond Myklebustdf817ba32014-09-27 17:41:51 -04002630 if (status == -EAGAIN)
Trond Myklebustb6d408b2009-12-03 15:53:22 -05002631 continue;
2632 if (status < 0)
2633 goto out_error;
Trond Myklebustdf817ba32014-09-27 17:41:51 -04002634 nfs4_state_end_reclaim_reboot(clp);
Trond Myklebustb79a4a12008-12-23 15:21:41 -05002635 }
2636
Trond Myklebust45870d62016-09-22 13:38:59 -04002637 /* 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 Myklebustb79a4a12008-12-23 15:21:41 -05002644 /* Now recover expired state... */
Trond Myklebust67e7b522019-08-07 07:31:27 -04002645 if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) {
Weston Andros Adamson8ed27d42012-05-29 15:57:59 -04002646 section = "reclaim nograce";
Andy Adamson591d71c2009-04-01 09:22:47 -04002647 status = nfs4_do_reclaim(clp,
Trond Myklebustc48f4f32010-06-16 09:52:27 -04002648 clp->cl_mvops->nograce_recovery_ops);
Trond Myklebustdf817ba32014-09-27 17:41:51 -04002649 if (status == -EAGAIN)
Trond Myklebustb6d408b2009-12-03 15:53:22 -05002650 continue;
2651 if (status < 0)
Trond Myklebustb79a4a12008-12-23 15:21:41 -05002652 goto out_error;
Trond Myklebust67e7b522019-08-07 07:31:27 -04002653 clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
Trond Myklebustb79a4a12008-12-23 15:21:41 -05002654 }
Trond Myklebust707fb4b2008-12-23 15:21:47 -05002655
Alexandros Batsakis5601a002009-12-14 21:27:58 -08002656 nfs4_end_drain_session(clp);
Trond Myklebustaeabb3c2018-11-19 20:11:45 -05002657 nfs4_clear_state_manager_bit(clp);
2658
Trond Myklebustb5fdf842020-02-18 15:58:31 -05002659 if (!test_and_set_bit(NFS4CLNT_RECALL_RUNNING, &clp->cl_state)) {
Trond Myklebustaeabb3c2018-11-19 20:11:45 -05002660 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 Myklebustb5fdf842020-02-18 15:58:31 -05002664 nfs4_layoutreturn_any_run(clp);
2665 clear_bit(NFS4CLNT_RECALL_RUNNING, &clp->cl_state);
Trond Myklebust707fb4b2008-12-23 15:21:47 -05002666 }
Trond Myklebuste005e802008-12-23 15:21:48 -05002667
Trond Myklebustf3c76492008-12-23 15:21:48 -05002668 /* Did we race with an attempt to give us more work? */
Trond Myklebustaeabb3c2018-11-19 20:11:45 -05002669 if (!test_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state))
Trond Myklebust21a446c2018-11-05 11:10:50 -05002670 return;
Trond Myklebustf3c76492008-12-23 15:21:48 -05002671 if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0)
Trond Myklebust21a446c2018-11-05 11:10:50 -05002672 return;
Trond Myklebusta1aa09be2018-11-05 12:17:01 -05002673 } while (refcount_read(&clp->cl_count) > 1 && !signalled());
Trond Myklebust21a446c2018-11-05 11:10:50 -05002674 goto out_drain;
2675
Linus Torvalds1da177e2005-04-16 15:20:36 -07002676out_error:
Weston Andros Adamson8ed27d42012-05-29 15:57:59 -04002677 if (strlen(section))
2678 section_sep = ": ";
Chuck Lever511ba522019-11-05 11:04:07 -05002679 trace_nfs4_state_mgr_failed(clp, section, status);
Weston Andros Adamson8ed27d42012-05-29 15:57:59 -04002680 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 Leverffe5a832012-09-14 17:23:23 -04002683 ssleep(1);
Trond Myklebust21a446c2018-11-05 11:10:50 -05002684out_drain:
Alexandros Batsakis5601a002009-12-14 21:27:58 -08002685 nfs4_end_drain_session(clp);
Trond Myklebuste005e802008-12-23 15:21:48 -05002686 nfs4_clear_state_manager_bit(clp);
2687}
2688
2689static 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. Biedermanca3574b2021-12-03 11:00:19 -06002696 module_put_and_kthread_exit(0);
Trond Myklebuste005e802008-12-23 15:21:48 -05002697 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002698}