Bug #20592: client::mkdirs not handle well when two clients send mkdir request for a same dir - CephFS - Ceph

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Bug #20592

closed

client::mkdirs not handle well when two clients send mkdir request for a same dir

Added by dongdong tao almost 7 years ago. Updated about 6 years ago.

Status:

Resolved

Priority:

Normal

Assignee:

Category:

Target version:

% Done:

Source:

Community (dev)

Tags:

Backport:

jewel

Regression:

Severity:

3 - minor

Reviewed:

Affected Versions:

ceph-qa-suite:

Component(FS):

Client

Labels (FS):

Pull request ID:

Crash signature (v1):

Crash signature (v2):

Description

suppose we got two clients trying to make two level directory:

client1 mkdirs: a/b
client2 mkdirs: a/c

in function "Client::mkdirs", it is possible that client1 and client2 all get -ENOENT when lookup "a" almost the same time, since _lookup only need the AUTH_SHARED caps.
then client1 and client2 will all send _mkdir request to MDS server, this will cause client1 or client2 got -EEXIST and just return without _mkdir b or c.

Related issues 1 (0 open — 1 closed)