ovl: update atime on upper

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Fix atime update logic in overlayfs.

This patch adds an i_op->update_time() handler to overlayfs inodes.  This
forwards atime updates to the upper layer only.  No atime updates are done
on lower layers.

Remove implicit atime updates to underlying files and directories with
O_NOATIME.  Remove explicit atime update in ovl_readlink().

Clear atime related mnt flags from cloned upper mount.  This means atime
updates are controlled purely by overlayfs mount options.

Reported-by: Konstantin Khlebnikov <koct9i@gmail.com> 
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

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This commit is contained in:

Miklos Szeredi 2016-07-29 12:05:23 +02:00

parent bb0d2b8ad2

commit d719e8f268

4 changed files with 37 additions and 5 deletions

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1

fs/overlayfs/dir.c

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29

fs/overlayfs/inode.c

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4

fs/overlayfs/overlayfs.h

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8

fs/overlayfs/super.c

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