gfs2: Use GL_NOBLOCK flag for non-blocking lookups

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Add the GL_NOBLOCK flag to the locking requests in gfs2_permission() and
gfs2_drevalidate() when called with the MAY_NOT_BLOCK flag and
LOOKUP_RCU flag, respectively.  This will cause the locking requests to
be handled without sleeping if possible.  We bail out with -ECHILD if we
can't grant the glock immediately.

Make sure not to dget() + dput() the parent dentry in gfs2_drevalidate()
in LOOKUP_RCU mode; dput() is a sleeping operation.

Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

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Abhi Das 2023-11-10 13:10:08 +01:00 • committed by Andreas Gruenbacher

parent f9f229c1f7

commit dd00aaeb34

2 changed files with 18 additions and 13 deletions

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23

fs/gfs2/dentry.c

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8

fs/gfs2/inode.c

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