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由 NeilBrown 提交于
In REF-walk mode, ->d_manage can return -EISDIR to indicate that the dentry is not really a mount trap (or even a mount point) and that any mounts or any DCACHE_NEED_AUTOMOUNT flag should be ignored. RCU-walk mode doesn't currently support this, so if there is a dentry with DCACHE_NEED_AUTOMOUNT set but which shouldn't be a mount-trap, lookup_fast() will always drop in REF-walk mode. With this patch, an -EISDIR from ->d_manage will always cause mounts and automounts to be ignored, both in REF-walk and RCU-walk. Bug-fixed-by: NDan Carpenter <dan.carpenter@oracle.com> Cc: Ian Kent <raven@themaw.net> Signed-off-by: NNeilBrown <neilb@suse.de> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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