ceph: fix session locking in handle_caps, ceph_check_caps

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Passing a session pointer to ceph_check_caps() used to mean it would leave
the session mutex locked.  That wasn't always possible if it wasn't passed
CHECK_CAPS_AUTHONLY.   If could unlock the passed session and lock a
differet session mutex, which was clearly wrong, and also emitted a
warning when it a racing CPU retook it and we did an unlock from the wrong
context.

This was only a problem when there was more than one MDS.

First, make ceph_check_caps unconditionally drop the session mutex, so that
it is free to lock other sessions as needed.  Then adjust the one caller
that passes in a session (handle_cap_grant) accordingly.

Signed-off-by: Sage Weil <sage@newdream.net>

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This commit is contained in:

Sage Weil 2010-03-16 13:39:28 -07:00

parent 4ea0043a29

commit cdc2ce056a

1 changed files with 9 additions and 5 deletions

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fs/ceph/caps.c

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