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authorTejun Heo <tj@kernel.org>2010-09-03 11:56:17 +0200
committerJens Axboe <jaxboe@fusionio.com>2010-09-10 12:35:37 +0200
commit6259f28459a9de820f47a9ece4ffa22d4596a9af (patch)
treebff61125a1b8298ce870c7ed3e53b9622a56b13f /drivers/block/loop.c
parentd391a2dda2f1c993f094bdb3a8a342c5e0546553 (diff)
block/loop: implement REQ_FLUSH/FUA support
Deprecate REQ_HARDBARRIER and implement REQ_FLUSH/FUA instead. Also, instead of checking file->f_op->fsync() directly, look at the value of vfs_fsync() and ignore -EINVAL return. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/block/loop.c')
-rw-r--r--drivers/block/loop.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 953d1e12f4d..5d27bc6596d 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -477,17 +477,17 @@ static int do_bio_filebacked(struct loop_device *lo, struct bio *bio)
pos = ((loff_t) bio->bi_sector << 9) + lo->lo_offset;
if (bio_rw(bio) == WRITE) {
- bool barrier = (bio->bi_rw & REQ_HARDBARRIER);
struct file *file = lo->lo_backing_file;
- if (barrier) {
- if (unlikely(!file->f_op->fsync)) {
- ret = -EOPNOTSUPP;
- goto out;
- }
+ /* REQ_HARDBARRIER is deprecated */
+ if (bio->bi_rw & REQ_HARDBARRIER) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+ if (bio->bi_rw & REQ_FLUSH) {
ret = vfs_fsync(file, 0);
- if (unlikely(ret)) {
+ if (unlikely(ret && ret != -EINVAL)) {
ret = -EIO;
goto out;
}
@@ -495,9 +495,9 @@ static int do_bio_filebacked(struct loop_device *lo, struct bio *bio)
ret = lo_send(lo, bio, pos);
- if (barrier && !ret) {
+ if ((bio->bi_rw & REQ_FUA) && !ret) {
ret = vfs_fsync(file, 0);
- if (unlikely(ret))
+ if (unlikely(ret && ret != -EINVAL))
ret = -EIO;
}
} else