From: Andrew Perepechko <andrew.perepechko@hpe.com>
Date: Sun, 31 Oct 2021 20:03:30 +0000 (+0300)
Subject: LU-15171 osd-ldiskfs: xattr_sem locking is missing for dquot_transfer
X-Git-Tag: 2.14.56~97
X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=commitdiff_plain;h=e6c7fcdaf40b130c39af2e3ee8b108c6e31a8ca8;hp=e6c7fcdaf40b130c39af2e3ee8b108c6e31a8ca8

LU-15171 osd-ldiskfs: xattr_sem locking is missing for dquot_transfer

Kernel commit 7a9ca53ae (~v4.13) added the requirement for xattr_sem locking
when calling *dquot_transfer. As of now, in rare cases, it is possible that
we can modify inode xattrs and perform their consistency checks in parallel,
which can fail.

Change-Id: I041694e30ce6c8398864c0ad57671df0bffd2f52
Signed-off-by: Andrew Perepechko <andrew.perepechko@hpe.com>
HPE-bug-id: LUS-10549
Reviewed-on: https://review.whamcloud.com/45424
Reviewed-by: Alexander Zarochentsev <alexander.zarochentsev@hpe.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
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