audit: Replace chunk attached to mark instead of replacing mark

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Audit tree code currently associates new fsnotify mark with each new
chunk. As chunk attached to an inode is replaced when new tag is added /
removed, we also need to remove old fsnotify mark and add a new one on
such occasion.  This is cumbersome and makes locking rules somewhat
difficult to follow.

Fix these problems by allocating fsnotify mark independently of chunk
and keeping it all the time while there is some chunk attached to an
inode. Also add documentation about the locking rules so that things are
easier to follow.

Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Richard Guy Briggs <rgb@redhat.com>
[PM: minor merge fuzz due to updated patches previously in the series]
Signed-off-by: Paul Moore <paul@paul-moore.com>

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Jan Kara 2018-11-12 09:55:16 -05:00 • committed by Paul Moore

parent 8432c70062

commit 83d23bc8ae

1 changed files with 83 additions and 77 deletions

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kernel/audit_tree.c

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