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| author | Zhang Yi <yi.zhang@huawei.com> | 2022-09-01 21:35:02 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-11 20:26:07 -0700 |
| commit | 6799b6983170c6dfdb2fcea8c97058557ea7b5b6 (patch) | |
| tree | 810d4f4f7cfe331ad5b1bdb3b9e70211fb1bcd51 /fs/ufs/balloc.c | |
| parent | 59a16786fa7a77dd383a62271e0102f1455bccea (diff) | |
| download | lwn-6799b6983170c6dfdb2fcea8c97058557ea7b5b6.tar.gz lwn-6799b6983170c6dfdb2fcea8c97058557ea7b5b6.zip | |
ufs: replace ll_rw_block()
ll_rw_block() is not safe for the sync read path because it cannot
guarantee that submitting read IO if the buffer has been locked. We
could get false positive EIO after wait_on_buffer() if the buffer has
been locked by others. So stop using ll_rw_block() in ufs.
Link: https://lkml.kernel.org/r/20220901133505.2510834-12-yi.zhang@huawei.com
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/ufs/balloc.c')
| -rw-r--r-- | fs/ufs/balloc.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c index bd810d8239f2..2436e3f82147 100644 --- a/fs/ufs/balloc.c +++ b/fs/ufs/balloc.c @@ -295,14 +295,10 @@ static void ufs_change_blocknr(struct inode *inode, sector_t beg, if (!buffer_mapped(bh)) map_bh(bh, inode->i_sb, oldb + pos); - if (!buffer_uptodate(bh)) { - ll_rw_block(REQ_OP_READ, 1, &bh); - wait_on_buffer(bh); - if (!buffer_uptodate(bh)) { - ufs_error(inode->i_sb, __func__, - "read of block failed\n"); - break; - } + if (bh_read(bh, 0) < 0) { + ufs_error(inode->i_sb, __func__, + "read of block failed\n"); + break; } UFSD(" change from %llu to %llu, pos %u\n", |