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| author | Dmitry Monakhov <dmonakhov@openvz.org> | 2010-03-02 15:51:02 +0300 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2010-03-05 00:20:27 +0100 |
| commit | 49792c806d0bfd53afc789dcdf50dc9bed2c5b83 (patch) | |
| tree | b24280fa76abad273e0f009a9cfe49b594c2becf /fs/ext3/inode.c | |
| parent | 7eb4969e04060dcf3fbd46af9c21b1059b853068 (diff) | |
| download | lwn-49792c806d0bfd53afc789dcdf50dc9bed2c5b83.tar.gz lwn-49792c806d0bfd53afc789dcdf50dc9bed2c5b83.zip | |
ext3: add writepage sanity checks
- There is theoretical possibility to perform writepage on
RO superblock. Add explicit check for what case.
- Page must being locked before writepage.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext3/inode.c')
| -rw-r--r-- | fs/ext3/inode.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c index c0ff9d6ffde6..eda9121d7d57 100644 --- a/fs/ext3/inode.c +++ b/fs/ext3/inode.c @@ -1528,6 +1528,7 @@ static int ext3_ordered_writepage(struct page *page, int err; J_ASSERT(PageLocked(page)); + WARN_ON_ONCE(IS_RDONLY(inode)); /* * We give up here if we're reentered, because it might be for a @@ -1600,6 +1601,9 @@ static int ext3_writeback_writepage(struct page *page, int ret = 0; int err; + J_ASSERT(PageLocked(page)); + WARN_ON_ONCE(IS_RDONLY(inode)); + if (ext3_journal_current_handle()) goto out_fail; @@ -1642,6 +1646,9 @@ static int ext3_journalled_writepage(struct page *page, int ret = 0; int err; + J_ASSERT(PageLocked(page)); + WARN_ON_ONCE(IS_RDONLY(inode)); + if (ext3_journal_current_handle()) goto no_write; |