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authorTejun Heo <htejun@gmail.com>2006-01-06 09:49:03 +0100
committerJens Axboe <axboe@suse.de>2006-01-06 09:49:03 +0100
commit8ffdc6550c47f75ca4e6c9f30a2a89063e035cf2 (patch)
treea478b9acef5c66242a964154f7ad3a0ea750ef0f /block
parent64100099ed22f71cce656c5c2caecf5c9cf255dc (diff)
downloadlinux-2.6.34-ux500-8ffdc6550c47f75ca4e6c9f30a2a89063e035cf2.tar.gz
[BLOCK] add @uptodate to end_that_request_last() and @error to rq_end_io_fn()
add @uptodate argument to end_that_request_last() and @error to rq_end_io_fn(). there's no generic way to pass error code to request completion function, making generic error handling of non-fs request difficult (rq->errors is driver-specific and each driver uses it differently). this patch adds @uptodate to end_that_request_last() and @error to rq_end_io_fn(). for fs requests, this doesn't really matter, so just using the same uptodate argument used in the last call to end_that_request_first() should suffice. imho, this can also help the generic command-carrying request jens is working on. Signed-off-by: tejun heo <htejun@gmail.com> Signed-Off-By: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'block')
-rw-r--r--block/elevator.c2
-rw-r--r--block/ll_rw_blk.c22
2 files changed, 16 insertions, 8 deletions
diff --git a/block/elevator.c b/block/elevator.c
index 6c3fc8a10bf..85a11cee7d1 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -498,7 +498,7 @@ struct request *elv_next_request(request_queue_t *q)
blkdev_dequeue_request(rq);
rq->flags |= REQ_QUIET;
end_that_request_chunk(rq, 0, nr_bytes);
- end_that_request_last(rq);
+ end_that_request_last(rq, 0);
} else {
printk(KERN_ERR "%s: bad return=%d\n", __FUNCTION__,
ret);
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index e02c88ca8fb..8b1ae69bc5a 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -344,7 +344,7 @@ EXPORT_SYMBOL(blk_queue_issue_flush_fn);
/*
* Cache flushing for ordered writes handling
*/
-static void blk_pre_flush_end_io(struct request *flush_rq)
+static void blk_pre_flush_end_io(struct request *flush_rq, int error)
{
struct request *rq = flush_rq->end_io_data;
request_queue_t *q = rq->q;
@@ -362,7 +362,7 @@ static void blk_pre_flush_end_io(struct request *flush_rq)
}
}
-static void blk_post_flush_end_io(struct request *flush_rq)
+static void blk_post_flush_end_io(struct request *flush_rq, int error)
{
struct request *rq = flush_rq->end_io_data;
request_queue_t *q = rq->q;
@@ -2317,7 +2317,7 @@ EXPORT_SYMBOL(blk_rq_map_kern);
*/
void blk_execute_rq_nowait(request_queue_t *q, struct gendisk *bd_disk,
struct request *rq, int at_head,
- void (*done)(struct request *))
+ rq_end_io_fn *done)
{
int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
@@ -2521,7 +2521,7 @@ EXPORT_SYMBOL(blk_put_request);
* blk_end_sync_rq - executes a completion event on a request
* @rq: request to complete
*/
-void blk_end_sync_rq(struct request *rq)
+void blk_end_sync_rq(struct request *rq, int error)
{
struct completion *waiting = rq->waiting;
@@ -3183,9 +3183,17 @@ EXPORT_SYMBOL(end_that_request_chunk);
/*
* queue lock must be held
*/
-void end_that_request_last(struct request *req)
+void end_that_request_last(struct request *req, int uptodate)
{
struct gendisk *disk = req->rq_disk;
+ int error;
+
+ /*
+ * extend uptodate bool to allow < 0 value to be direct io error
+ */
+ error = 0;
+ if (end_io_error(uptodate))
+ error = !uptodate ? -EIO : uptodate;
if (unlikely(laptop_mode) && blk_fs_request(req))
laptop_io_completion();
@@ -3200,7 +3208,7 @@ void end_that_request_last(struct request *req)
disk->in_flight--;
}
if (req->end_io)
- req->end_io(req);
+ req->end_io(req, error);
else
__blk_put_request(req->q, req);
}
@@ -3212,7 +3220,7 @@ void end_request(struct request *req, int uptodate)
if (!end_that_request_first(req, uptodate, req->hard_cur_sectors)) {
add_disk_randomness(req->rq_disk);
blkdev_dequeue_request(req);
- end_that_request_last(req);
+ end_that_request_last(req, uptodate);
}
}