[LU-17476] lnet: only report mismatched nid in ME if bits match

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.5
• Affects Version/s: Lustre 2.15.5
• Severity: 3
• Assignee: Serguei Smirnov
• Reporter: Serguei Smirnov

Description

There are rare cases where a client-to-server AST reply was being dropped by the server, with messages similar to the following with o104, o105, or o106 as the RPC type:

Lustre: 3678513:0:(client.c:2318:ptlrpc_expire_one_request())
     @@@ Request sent has timed out for slow reply: [sent 1706140870/real 1706140870]
      req@00000000a8fbe768 x1788044801687552/t0(0) o104->lfs00-MDT0001@10.31.3.109@tcp:15/16
     lens 328/224 e 0 to 1 dl 1706140908 ref 1 fl Rpc:XQr/0/ffffffff rc 0/-1 job:''

and in the kernel debug logs it shows that LNet is dropping the RPC due to no matching request:

lnet_parse_put()) Dropping PUT from 12345-10.31.3.108@tcp portal 16 match 1788044801687552 offset 224 length 224: 4
:
request_out_callback()) @@@ type 5, status 0  req@00000000a8fbe768 x1788044801687552/t0(0) o104->lfs02-MDT0001@10.31.3.109@tcp:15/16 lens 328/224 e 0 to 0 dl 1706140946 ref 2 fl Rpc:r/2/ffffffff rc 0/-1 job:''
lnet_parse_put()) Dropping PUT from 12345-10.31.3.108@tcp portal 16 match 1788044801687552 offset 224 length 224: 4
lnet_is_health_check()) Msg 00000000a906b193 is in inconsistent state, don't perform health checking (-2, 0)
lnet_is_health_check()) health check = 0, status = -2, hstatus = 0

As a part of MD matching for incoming GET or PUT from a peer with multiple NIDs, use "matchbits" only if they are available and only report an error on NID/PID mismatch. If can't use "matchbits" for matching, fail on NID/PID mismatch as before.

Issue Links

• is related to: LU-17958 Clients can't mount after server upgrade
• is related to: LU-17379 try MGS NIDs more quickly at initial mount

Comments

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/55489/
Subject: LU-17476 lnet: use bits only to match ME in all cases
Project: fs/lustre-release
Branch: b2_15
Current Patch Set:
Commit: a34b3596ad29fc4fd9e7d1f007e4f6ee514dfcaa

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/55488/
Subject: LU-17476 lnet: prefer to use bits only to match ME
Project: fs/lustre-release
Branch: b2_15
Current Patch Set:
Commit: eb35ce5538512b67fd82955c54a148eb707a10ee

[Gerrit Updater]

"Frederick Dilger <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/55489
Subject: LU-17476 lnet: use bits only to match ME in all cases
Project: fs/lustre-release
Branch: b2_15
Current Patch Set: 1
Commit: b342b92b923938892df81a207a0271473c16060e

[Gerrit Updater]

"Frederick Dilger <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/55488
Subject: LU-17476 lnet: prefer to use bits only to match ME
Project: fs/lustre-release
Branch: b2_15
Current Patch Set: 1
Commit: e10fa830fe3313768df31eee657fe1b02792c1ab