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author | Anton Altaparmakov <aia21@cantab.net> | 2005-09-08 21:08:11 (GMT) |
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committer | Anton Altaparmakov <aia21@cantab.net> | 2005-09-08 21:08:11 (GMT) |
commit | a01ac532b519dc0e0b4d8bc4e12373e4e4cd1b1a (patch) | |
tree | 6d6021b5f951790b32f332d05106b9ff82ebb5a1 /fs/ntfs/aops.c | |
parent | 311120eca0013083f5eb0aff13ffb8aa9fdd050c (diff) | |
download | linux-a01ac532b519dc0e0b4d8bc4e12373e4e4cd1b1a.tar.xz |
NTFS: Fix page_has_buffers()/page_buffers() handling in fs/ntfs/aops.c.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
Diffstat (limited to 'fs/ntfs/aops.c')
-rw-r--r-- | fs/ntfs/aops.c | 38 |
1 files changed, 21 insertions, 17 deletions
diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c index 2482b67..52e1aff 100644 --- a/fs/ntfs/aops.c +++ b/fs/ntfs/aops.c @@ -185,13 +185,15 @@ static int ntfs_read_block(struct page *page) blocksize_bits = VFS_I(ni)->i_blkbits; blocksize = 1 << blocksize_bits; - if (!page_has_buffers(page)) + if (!page_has_buffers(page)) { create_empty_buffers(page, blocksize, 0); - bh = head = page_buffers(page); - if (unlikely(!bh)) { - unlock_page(page); - return -ENOMEM; + if (unlikely(!page_has_buffers(page))) { + unlock_page(page); + return -ENOMEM; + } } + bh = head = page_buffers(page); + BUG_ON(!bh); iblock = (s64)page->index << (PAGE_CACHE_SHIFT - blocksize_bits); read_lock_irqsave(&ni->size_lock, flags); @@ -530,19 +532,21 @@ static int ntfs_write_block(struct page *page, struct writeback_control *wbc) BUG_ON(!PageUptodate(page)); create_empty_buffers(page, blocksize, (1 << BH_Uptodate) | (1 << BH_Dirty)); + if (unlikely(!page_has_buffers(page))) { + ntfs_warning(vol->sb, "Error allocating page " + "buffers. Redirtying page so we try " + "again later."); + /* + * Put the page back on mapping->dirty_pages, but leave + * its buffers' dirty state as-is. + */ + redirty_page_for_writepage(wbc, page); + unlock_page(page); + return 0; + } } bh = head = page_buffers(page); - if (unlikely(!bh)) { - ntfs_warning(vol->sb, "Error allocating page buffers. " - "Redirtying page so we try again later."); - /* - * Put the page back on mapping->dirty_pages, but leave its - * buffer's dirty state as-is. - */ - redirty_page_for_writepage(wbc, page); - unlock_page(page); - return 0; - } + BUG_ON(!bh); /* NOTE: Different naming scheme to ntfs_read_block()! */ @@ -910,7 +914,6 @@ static int ntfs_write_mst_block(struct page *page, sync = (wbc->sync_mode == WB_SYNC_ALL); /* Make sure we have mapped buffers. */ - BUG_ON(!page_has_buffers(page)); bh = head = page_buffers(page); BUG_ON(!bh); @@ -2397,6 +2400,7 @@ void mark_ntfs_record_dirty(struct page *page, const unsigned int ofs) { buffers_to_free = bh; } bh = head = page_buffers(page); + BUG_ON(!bh); do { bh_ofs = bh_offset(bh); if (bh_ofs + bh_size <= ofs) |