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authorChristoph Hellwig <hch@lst.de>2017-06-03 09:38:04 +0200
committerJens Axboe <axboe@fb.com>2017-06-09 09:27:32 -0600
commit2a842acab109f40f0d7d10b38e9ca88390628996 (patch)
treebdfc7a47fe655c2ea7a5f74127015d7a502042f0 /block/blk-flush.c
parent1be5690984588953e759af0a4c6ddac182a1806c (diff)
downloadlinux-0-day-2a842acab109f40f0d7d10b38e9ca88390628996.tar.gz
block: introduce new block status code type
Currently we use nornal Linux errno values in the block layer, and while we accept any error a few have overloaded magic meanings. This patch instead introduces a new blk_status_t value that holds block layer specific status codes and explicitly explains their meaning. Helpers to convert from and to the previous special meanings are provided for now, but I suspect we want to get rid of them in the long run - those drivers that have a errno input (e.g. networking) usually get errnos that don't know about the special block layer overloads, and similarly returning them to userspace will usually return somethings that strictly speaking isn't correct for file system operations, but that's left as an exercise for later. For now the set of errors is a very limited set that closely corresponds to the previous overloaded errno values, but there is some low hanging fruite to improve it. blk_status_t (ab)uses the sparse __bitwise annotations to allow for sparse typechecking, so that we can easily catch places passing the wrong values. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-flush.c')
-rw-r--r--block/blk-flush.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/block/blk-flush.c b/block/blk-flush.c
index c4e0880..a572b47 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -164,7 +164,7 @@ static bool blk_flush_queue_rq(struct request *rq, bool add_front)
*/
static bool blk_flush_complete_seq(struct request *rq,
struct blk_flush_queue *fq,
- unsigned int seq, int error)
+ unsigned int seq, blk_status_t error)
{
struct request_queue *q = rq->q;
struct list_head *pending = &fq->flush_queue[fq->flush_pending_idx];
@@ -216,7 +216,7 @@ static bool blk_flush_complete_seq(struct request *rq,
return kicked | queued;
}
-static void flush_end_io(struct request *flush_rq, int error)
+static void flush_end_io(struct request *flush_rq, blk_status_t error)
{
struct request_queue *q = flush_rq->q;
struct list_head *running;
@@ -341,7 +341,7 @@ static bool blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq)
return blk_flush_queue_rq(flush_rq, false);
}
-static void flush_data_end_io(struct request *rq, int error)
+static void flush_data_end_io(struct request *rq, blk_status_t error)
{
struct request_queue *q = rq->q;
struct blk_flush_queue *fq = blk_get_flush_queue(q, NULL);
@@ -382,7 +382,7 @@ static void flush_data_end_io(struct request *rq, int error)
blk_run_queue_async(q);
}
-static void mq_flush_data_end_io(struct request *rq, int error)
+static void mq_flush_data_end_io(struct request *rq, blk_status_t error)
{
struct request_queue *q = rq->q;
struct blk_mq_hw_ctx *hctx;