https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-12828 Lustre <p>It can lead to wrong UNLOCK:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>00000080:00010000:0.0:1519718439.198477:0:9470:0:(file.c:3583:ll_file_flock()) inode=[0x200000400:0x1:0x0], pid=9470, owner=0xffff88012d046e00, flags=0x0, mode=2, start=0, end=9223372036854775807 00010000:00010000:0.0:1519718439.200930:0:7184:0:(ldlm_flock.c:314:ldlm_process_flock_lock()) flags 0x0 owner 18446612137364450816 pid 9470 mode 2 start 0 end 9223372036854775807 00000080:00010000:0.0:1519718439.210498:0:9472:0:(file.c:3583:ll_file_flock()) inode=[0x200000400:0x1:0x0], pid=9472, owner=0xffff88013606ce00, flags=0x0, mode=2, start=0, end=9223372036854775807 00000080:00010000:0.0:1519718440.231947:0:9470:0:(file.c:3583:ll_file_flock()) inode=[0x200000400:0x1:0x0], pid=9470, owner=0xffff88012d046e00, flags=0x0, mode=32, start=0, end=9223372036854775807 00000100:00080000:0.0:1519718440.248334:0:5786:0:(client.c:2792:ptlrpc_resend_req()) @@@ going to resend req@ffff88012d036f00 x1593540148730064/t0(0) o101-&gt;lustre-MDT0000-mdc-ffff88009c2e4000@0@lo:12/10 lens 328/344 e 0 to 0 dl 1519718447 ref 2 fl Rpc:/0/ffffffff rc 0/-1 00000001:00020000:0.0:1519718440.248489:0:7185:0:(fail.c:133:__cfs_fail_timeout_set()) cfs_fail_timeout id 998 sleeping for 10000ms 00000001:00020000:0.0:1519718450.233339:0:7184:0:(fail.c:137:__cfs_fail_timeout_set()) cfs_fail_timeout id 999 awake 00010000:00010000:0.0:1519718450.233528:0:7184:0:(ldlm_flock.c:314:ldlm_process_flock_lock()) flags 0x0 owner 18446612137364450816 pid 9470 mode 32 start 0 end 9223372036854775807 00000001:00020000:0.0:1519718450.237109:0:9470:0:(fail.c:133:__cfs_fail_timeout_set()) cfs_fail_timeout id 998 sleeping for 11000ms 00000001:00020000:0.0:1519718450.248712:0:7185:0:(fail.c:137:__cfs_fail_timeout_set()) cfs_fail_timeout id 998 awake 00000001:00020000:0.0:1519718450.249192:0:7185:0:(fail.c:133:__cfs_fail_timeout_set()) cfs_fail_timeout id 998 sleeping for 11000ms 00000001:00020000:0.0:1519718458.253208:0:7184:0:(fail.c:133:__cfs_fail_timeout_set()) cfs_fail_timeout id 998 sleeping for 10000ms 00000001:00020000:0.0:1519718461.237222:0:9470:0:(fail.c:137:__cfs_fail_timeout_set()) cfs_fail_timeout id 998 awake 00010000:00010000:0.0:1519718461.237816:0:9470:0:(ldlm_flock.c:314:ldlm_process_flock_lock()) flags 0x800000000 owner 18446612137364450816 pid 9470 mode 32 start 0 end 9223372036854775807 00010000:00010000:0.0:1519718461.239919:0:9484:0:(ldlm_flock.c:314:ldlm_process_flock_lock()) flags 0x0 owner 18446612137364450816 pid 9470 mode 2 start 0 end 9223372036854775807 00010000:00010000:0.0:1519718461.241247:0:9470:0:(ldlm_flock.c:819:ldlm_flock_completion_ast()) ### client-side enqueue returned a blocked lock, sleeping ns: lustre-MDT0000-mdc-ffff88009c2e4000 lock: ffff8800a0f52800/0x6628549332bf7a4f lrc: 4/0,1 mode: --/PW res: [0x200000400:0x1:0x0].c rrc: 4 type: FLK pid: 9470 [0-&gt;9223372036854775807] flags: 0x0 nid: local remote: 0x6628549332bf7a56 expref: -99 pid: 9470 timeout: 0 00000001:00020000:0.0:1519718461.249186:0:7185:0:(fail.c:137:__cfs_fail_timeout_set()) cfs_fail_timeout id 998 awake 00010000:00010000:0.0:1519718461.249206:0:7185:0:(ldlm_flock.c:314:ldlm_process_flock_lock()) flags 0x0 owner 18446612137364450816 pid 9470 mode 32 start 0 end 9223372036854775807 00010000:00020000:0.0:1519718461.251161:0:9470:0:(ldlm_flock.c:885:ldlm_flock_completion_ast()) client-side: only asynchronous lock enqueue can be canceled by CANCELK </pre> </div></div> <p>The similar scenario is possible with double FLOCK lock which leads to lock on the MDS without any lock on a client</p> LU-12828

FLOCK request can be processed twice during resend

Bug Critical Resolved Fixed Andriy Skulysh Andriy Skulysh Tue, 1 Oct 2019 16:45:43 +0000 Tue, 16 Mar 2021 19:57:17 +0000 Sat, 14 Dec 2019 13:35:39 +0000 Lustre 2.14.0 Lustre 2.15.0 0 5 <p>Andriy Skulysh (c17819@cray.com) uploaded a new patch: <a href="https://review.whamcloud.com/36340" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/36340</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12828" title="FLOCK request can be processed twice during resend" class="issue-link" data-issue-key="LU-12828"><del>LU-12828</del></a> ldlm: FLOCK request can be processed twice<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 74955a7424a83c91efe025f71a8b7df73a2209d9</p> <p>Sorry for the noisy.</p> <p>can you please elaborate how double locj happenswnad why it would lead to a lock on server with no lock on client? I think second flock of a double flock is a noop by definition?</p> <p>I looked at the trace but it's not obvious what wrong unlock means too.</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/36340/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/36340/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12828" title="FLOCK request can be processed twice during resend" class="issue-link" data-issue-key="LU-12828"><del>LU-12828</del></a> ldlm: FLOCK request can be processed twice<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 85a12c6c8d7a6d40fc81c73f9b900475b58e3e98</p> <p>Landed for 2.14</p> <p>Vitaly Fertman (vitaly.fertman@hpe.com) uploaded a new patch: <a href="https://review.whamcloud.com/41818" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41818</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12828" title="FLOCK request can be processed twice during resend" class="issue-link" data-issue-key="LU-12828"><del>LU-12828</del></a> ldlm: not freed req on enqueue<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 0673bd5ca08177ed9e0dde82691409437c91eceb</p> <p><a href="https://jira.whamcloud.com/secure/ViewProfile.jspa?name=vitaly_fertman" class="user-hover" rel="vitaly_fertman">vitaly_fertman</a>, <a href="https://jira.whamcloud.com/browse/LU-12828" title="FLOCK request can be processed twice during resend" class="issue-link" data-issue-key="LU-12828"><del>LU-12828</del></a> is RESOLVED. You should either re-open this ticket or open a new one for <a href="https://review.whamcloud.com/#/c/41818/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/#/c/41818/</a>. I imagine that a new ticket would be in order.</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/41818/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/41818/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12828" title="FLOCK request can be processed twice during resend" class="issue-link" data-issue-key="LU-12828"><del>LU-12828</del></a> ldlm: not freed req on enqueue<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: ce9c1c11593814dacacc2c66f9fcf124ea84b807</p> Development Rank 1|i00nlb: Rank (Obsolete) 9223372036854775807 Severity