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authorJan Kara <jack@suse.cz>2005-10-30 15:00:16 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-30 17:37:17 -0800
commitaaa4059bc2dca7fa816624a28db1958c3a22df9b (patch)
tree8ae1d5458e2f68f96b033f10dae216847c32d4d2 /include/linux
parente812cb5226af32aec91bcbaa8365bd7f921b6ebb (diff)
[PATCH] ext3: Fix unmapped buffers in transaction's lists
Fix the problem (BUG 4964) with unmapped buffers in transaction's t_sync_data list. The problem is we need to call filesystem's own invalidatepage() from block_write_full_page(). block_write_full_page() must call filesystem's invalidatepage(). Otherwise following nasty race can happen: proc 1 proc 2 ------ ------ - write some new data to 'offset' => bh gets to the transactions data list - starts truncate => i_size set to new size - mpage_writepages() - ext3_ordered_writepage() to 'offset' - block_write_full_page() - page->index > end_index+1 - block_invalidatepage() - discard_buffer() - clear_buffer_mapped() - commit triggers and finds unmapped buffer - BOOM! Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/buffer_head.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index c937d6e6550..1db061bb6b0 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -190,6 +190,7 @@ extern int buffer_heads_over_limit;
*/
int try_to_release_page(struct page * page, gfp_t gfp_mask);
int block_invalidatepage(struct page *page, unsigned long offset);
+int do_invalidatepage(struct page *page, unsigned long offset);
int block_write_full_page(struct page *page, get_block_t *get_block,
struct writeback_control *wbc);
int block_read_full_page(struct page*, get_block_t*);