From f9454548e17cd56bad081bd7d55a09b001950cbb Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Wed, 19 Nov 2008 15:36:38 -0800 Subject: [PATCH] don't unlink an active swapfile Peter Cordes is sorry that he rm'ed his swapfiles while they were in use, he then had no pathname to swapoff. It's a curious little oversight, but not one worth a lot of hackery. Kudos to Willy Tarreau for turning this around from a discussion of synthetic pathnames to how to prevent unlink. Mimic immutable: prohibit unlinking an active swapfile in may_delete() (and don't worry my little head over the tiny race window). Signed-off-by: Hugh Dickins Cc: Willy Tarreau Acked-by: Christoph Hellwig Cc: Peter Cordes Cc: Bodo Eggert <7eggert@gmx.de> Cc: David Newall Cc: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/namei.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/namei.c b/fs/namei.c index 09ce58e..d34e0f9 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1378,7 +1378,7 @@ static int may_delete(struct inode *dir,struct dentry *victim,int isdir) if (IS_APPEND(dir)) return -EPERM; if (check_sticky(dir, victim->d_inode)||IS_APPEND(victim->d_inode)|| - IS_IMMUTABLE(victim->d_inode)) + IS_IMMUTABLE(victim->d_inode) || IS_SWAPFILE(victim->d_inode)) return -EPERM; if (isdir) { if (!S_ISDIR(victim->d_inode->i_mode)) -- 2.7.4