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authorNeilBrown <neilb@suse.de>2007-05-23 13:58:10 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-23 20:14:14 -0700
commitab6085c795a71b6a21afe7469d30a365338add7a (patch)
treed9d901ea1c3401906553ef9e684a1094a1b3083a /include
parent787f17feb204ed1c6331892fb8124b80dc9fe288 (diff)
md: don't write more than is required of the last page of a bitmap
It is possible that real data or metadata follows the bitmap without full page alignment. So limit the last write to be only the required number of bytes, rounded up to the hard sector size of the device. Signed-off-by: Neil Brown <neilb@suse.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/raid/bitmap.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/raid/bitmap.h b/include/linux/raid/bitmap.h
index 6db9a4c1535..dd5a05d03d4 100644
--- a/include/linux/raid/bitmap.h
+++ b/include/linux/raid/bitmap.h
@@ -232,6 +232,7 @@ struct bitmap {
struct page **filemap; /* list of cache pages for the file */
unsigned long *filemap_attr; /* attributes associated w/ filemap pages */
unsigned long file_pages; /* number of pages in the file */
+ int last_page_size; /* bytes in the last page */
unsigned long flags;