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| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2009-01-30 14:09:06 -0600 |
|---|---|---|
| committer | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2009-01-30 14:09:06 -0600 |
| commit | 1ad53a98c927a9b5b1b57288ac0edec562fbcf8d (patch) | |
| tree | f8de5c192927fd2594437018a6489798dbafcbed | |
| parent | b5c816a4f177604ae708892bba074b1d534fcbee (diff) | |
| download | linux-1ad53a98c927a9b5b1b57288ac0edec562fbcf8d.tar.bz2 | |
jfs: Fix error handling in metapage_writepage()
Improved error handling so that last_write_complete(), and thus
end_page_writeback(), gets called only once.
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Reported-by: Eric Sesterhenn <snakebyte@gmx.de>
| -rw-r--r-- | fs/jfs/jfs_metapage.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c index c350057087dd..07b6c5dfb4b6 100644 --- a/fs/jfs/jfs_metapage.c +++ b/fs/jfs/jfs_metapage.c @@ -369,6 +369,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc) unsigned long bio_bytes = 0; unsigned long bio_offset = 0; int offset; + int bad_blocks = 0; page_start = (sector_t)page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits); @@ -394,6 +395,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc) } clear_bit(META_dirty, &mp->flag); + set_bit(META_io, &mp->flag); block_offset = offset >> inode->i_blkbits; lblock = page_start + block_offset; if (bio) { @@ -402,7 +404,6 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc) len = min(xlen, blocks_per_mp); xlen -= len; bio_bytes += len << inode->i_blkbits; - set_bit(META_io, &mp->flag); continue; } /* Not contiguous */ @@ -424,12 +425,14 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc) xlen = (PAGE_CACHE_SIZE - offset) >> inode->i_blkbits; pblock = metapage_get_blocks(inode, lblock, &xlen); if (!pblock) { - /* Need better error handling */ printk(KERN_ERR "JFS: metapage_get_blocks failed\n"); - dec_io(page, last_write_complete); + /* + * We already called inc_io(), but can't cancel it + * with dec_io() until we're done with the page + */ + bad_blocks++; continue; } - set_bit(META_io, &mp->flag); len = min(xlen, (int)JFS_SBI(inode->i_sb)->nbperpage); bio = bio_alloc(GFP_NOFS, 1); @@ -459,6 +462,9 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc) unlock_page(page); + if (bad_blocks) + goto err_out; + if (nr_underway == 0) end_page_writeback(page); @@ -474,7 +480,9 @@ skip: bio_put(bio); unlock_page(page); dec_io(page, last_write_complete); - +err_out: + while (bad_blocks--) + dec_io(page, last_write_complete); return -EIO; } |