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authorNathan Scott <nathans@sgi.com>2006-09-28 11:03:13 +1000
committerTim Shimmin <tes@sgi.com>2006-09-28 11:03:13 +1000
commit948ecdb4c118293d2f3e267eec642c30c5d3a056 (patch)
tree73675cc22ba239f49c479acae0fed447270b5d06 /fs
parentefb8ad7e9431a430a75d44288614cf6047ff4baa (diff)
[XFS] Be more defensive with page flags (error/private) for metadata
buffers. SGI-PV: 955302 SGI-Modid: xfs-linux-melb:xfs-kern:26801a Signed-off-by: Nathan Scott <nathans@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/linux-2.6/xfs_buf.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 58b6599de61..9bbadafdcb0 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -318,8 +318,12 @@ xfs_buf_free(
if ((bp->b_flags & XBF_MAPPED) && (bp->b_page_count > 1))
free_address(bp->b_addr - bp->b_offset);
- for (i = 0; i < bp->b_page_count; i++)
- page_cache_release(bp->b_pages[i]);
+ for (i = 0; i < bp->b_page_count; i++) {
+ struct page *page = bp->b_pages[i];
+
+ ASSERT(!PagePrivate(page));
+ page_cache_release(page);
+ }
_xfs_buf_free_pages(bp);
} else if (bp->b_flags & _XBF_KMEM_ALLOC) {
/*
@@ -400,6 +404,7 @@ _xfs_buf_lookup_pages(
nbytes = min_t(size_t, size, PAGE_CACHE_SIZE - offset);
size -= nbytes;
+ ASSERT(!PagePrivate(page));
if (!PageUptodate(page)) {
page_count--;
if (blocksize >= PAGE_CACHE_SIZE) {
@@ -1117,10 +1122,10 @@ xfs_buf_bio_end_io(
do {
struct page *page = bvec->bv_page;
+ ASSERT(!PagePrivate(page));
if (unlikely(bp->b_error)) {
if (bp->b_flags & XBF_READ)
ClearPageUptodate(page);
- SetPageError(page);
} else if (blocksize >= PAGE_CACHE_SIZE) {
SetPageUptodate(page);
} else if (!PagePrivate(page) &&