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[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>
This commit is contained in:
Nathan Scott 2006-09-28 11:03:13 +10:00 committed by Tim Shimmin
parent efb8ad7e94
commit 948ecdb4c1
1 changed files with 8 additions and 3 deletions
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11
fs/xfs/linux-2.6/xfs_buf.c
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@ -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) &&