From: Ian Kent Date: Sun, 25 Jun 2006 12:48:47 +0000 (-0700) Subject: [PATCH] autofs4: need to invalidate children on tree mount expire X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f9022f66336b8ad680884d4810f1c421fff899e3;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [PATCH] autofs4: need to invalidate children on tree mount expire I've found a case where invalid dentrys in a mount tree, waiting to be cleaned up by d_invalidate, prevent the expected expire. In this case dentrys created during a lookup for which a mount fails or has no entry in the mount map contribute to the d_count of the parent dentry. These dentrys may not be invalidated prior to comparing the interanl usage count of valid autofs dentrys against the dentry d_count which makes a mount tree appear busy so it doesn't expire. Signed-off-by: Ian Kent Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c index b8ce02607d66..4456d1daa40f 100644 --- a/fs/autofs4/expire.c +++ b/fs/autofs4/expire.c @@ -174,6 +174,12 @@ static int autofs4_tree_busy(struct vfsmount *mnt, struct autofs_info *ino = autofs4_dentry_ino(p); unsigned int ino_count = atomic_read(&ino->count); + /* + * Clean stale dentries below that have not been + * invalidated after a mount fail during lookup + */ + d_invalidate(p); + /* allow for dget above and top is already dgot */ if (p == top) ino_count += 2;