From 9b1e3afd6d56937ced3914971621d0f053ea9178 Mon Sep 17 00:00:00 2001 From: Ian Kent Date: Tue, 21 Jun 2005 17:16:38 -0700 Subject: [PATCH] autofs4: avoid panic on bind mount of autofs owned directory While this is not a solution to bind and move mounts on autofs owned directories it is necessary to fix the trady error handling. At least it avoids the kernel panic I observed checking out bug #4589. Signed-off-by: Ian Kent Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/autofs4/autofs_i.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'fs/autofs4/autofs_i.h') diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index c7b2b8890188..9c09641ce907 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -185,6 +185,19 @@ int autofs4_wait(struct autofs_sb_info *,struct dentry *, enum autofs_notify); int autofs4_wait_release(struct autofs_sb_info *,autofs_wqt_t,int); void autofs4_catatonic_mode(struct autofs_sb_info *); +static inline int autofs4_follow_mount(struct vfsmount **mnt, struct dentry **dentry) +{ + int res = 0; + + while (d_mountpoint(*dentry)) { + int followed = follow_down(mnt, dentry); + if (!followed) + break; + res = 1; + } + return res; +} + static inline int simple_positive(struct dentry *dentry) { return dentry->d_inode && !d_unhashed(dentry); -- cgit v1.2.3-59-g8ed1b