On Fri, Dec 27, 2013 at 5:32 AM, Ian Kent <raven@xxxxxxxxxx> wrote:
Hi,
saw some typos...
> From: Ian Kent <ikent@xxxxxxxxxx>
>
> The autofs4 module doesn't consider symlinks for expire as it did
> in the older autofs v3 module (so it's actually a long stnding
s/stnding/standing
> regression).
>
> The user space daemon has focused on the use of bind mounts instead
> of symlinks for a long time now and that's why this has not been
> noticed. But with the future addition of amd map parsing to
> automount(8), not to mention amd itself (of am-utils), symlink
> expiry will be needed.
>
> The direct and offset mount types can't be symlinks and the tree
> mounts of version 4 were always real mounts so only indirect
> mounts need expire symlinks.
>
> Since the current users of the autofs4 module haven't reproted
s/reproted/reported
- Sedat -
> this as a problem to date this patch probably isn't a candidate
> for backport to stable.
>
> Signed-off-by: Ian Kent <ikent@xxxxxxxxxx>
> ---
> fs/autofs4/expire.c | 14 ++++++++++++++
> fs/autofs4/symlink.c | 4 ++++
> 2 files changed, 18 insertions(+)
>
> diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
> index 3d9d3f5..394e90b 100644
> --- a/fs/autofs4/expire.c
> +++ b/fs/autofs4/expire.c
> @@ -402,6 +402,20 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
> goto next;
> }
>
> + if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)) {
> + DPRINTK("checking symlink %p %.*s",
> + dentry, (int)dentry->d_name.len, dentry->d_name.name);
> + /*
> + * A symlink can't be "busy" in the usual sense so
> + * just check last used for expire timeout.
> + */
> + if (autofs4_can_expire(dentry, timeout, do_now)) {
> + expired = dentry;
> + goto found;
> + }
> + goto next;
> + }
> +
> if (simple_empty(dentry))
> goto next;
>
> diff --git a/fs/autofs4/symlink.c b/fs/autofs4/symlink.c
> index f27c094..1e8ea19 100644
> --- a/fs/autofs4/symlink.c
> +++ b/fs/autofs4/symlink.c
> @@ -14,6 +14,10 @@
>
> static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
> {
> + struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
> + struct autofs_info *ino = autofs4_dentry_ino(dentry);
> + if (ino && !autofs4_oz_mode(sbi))
> + ino->last_used = jiffies;
> nd_set_link(nd, dentry->d_inode->i_private);
> return NULL;
> }
>
> --
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