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| author | Hugh Dickins <hugh@veritas.com> | 2008-11-19 15:36:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-19 18:49:59 -0800 |
| commit | f9454548e17cd56bad081bd7d55a09b001950cbb (patch) | |
| tree | dd1d2000dbdae6d9baa638d5166b268ec40e8445 | |
| parent | 63eb6b93ce725e4c5f38fc85dd703d49465b03cb (diff) | |
| download | linux-f9454548e17cd56bad081bd7d55a09b001950cbb.tar.gz linux-f9454548e17cd56bad081bd7d55a09b001950cbb.tar.bz2 linux-f9454548e17cd56bad081bd7d55a09b001950cbb.zip | |
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 <hugh@veritas.com>
Cc: Willy Tarreau <w@1wt.eu>
Acked-by: Christoph Hellwig <hch@infradead.org>
Cc: Peter Cordes <peter@cordes.ca>
Cc: Bodo Eggert <7eggert@gmx.de>
Cc: David Newall <davidn@davidnewall.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/namei.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/namei.c b/fs/namei.c index 09ce58e49e72..d34e0f9681c6 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)) |