Commit 0aa8a47e authored by Jens Axboe's avatar Jens Axboe

[PATCH] block cleanups

o Change the blk_dump_rq_flags() a bit

o Use rq->bio as an indication of ->bio is valid or not, instead of
  checking REQ_PC. Now we can have a bio on a REQ_BLOCK_PC as well.

o Don't print eio error in end_that_request_first(), if REQ_QUIET is set.

o debug check for valid bio in end_that_request_first()

o Add blk_pc_request() check REQ_BLOCK_PC, similar to blk_fs_request()
parent 148747b7
...@@ -670,12 +670,10 @@ void blk_dump_rq_flags(struct request *rq, char *msg) ...@@ -670,12 +670,10 @@ void blk_dump_rq_flags(struct request *rq, char *msg)
bit++; bit++;
} while (bit < __REQ_NR_BITS); } while (bit < __REQ_NR_BITS);
if (rq->flags & REQ_CMD)
printk("sector %llu, nr/cnr %lu/%u\n", (unsigned long long)rq->sector, printk("sector %llu, nr/cnr %lu/%u\n", (unsigned long long)rq->sector,
rq->nr_sectors, rq->nr_sectors,
rq->current_nr_sectors); rq->current_nr_sectors);
printk("bio %p, biotail %p\n", rq->bio, rq->biotail);
printk("\n");
} }
void blk_recount_segments(request_queue_t *q, struct bio *bio) void blk_recount_segments(request_queue_t *q, struct bio *bio)
...@@ -1927,7 +1925,7 @@ inline void blk_recalc_rq_segments(struct request *rq) ...@@ -1927,7 +1925,7 @@ inline void blk_recalc_rq_segments(struct request *rq)
inline void blk_recalc_rq_sectors(struct request *rq, int nsect) inline void blk_recalc_rq_sectors(struct request *rq, int nsect)
{ {
if (rq->flags & REQ_CMD) { if (rq->bio) {
rq->hard_sector += nsect; rq->hard_sector += nsect;
rq->nr_sectors = rq->hard_nr_sectors -= nsect; rq->nr_sectors = rq->hard_nr_sectors -= nsect;
rq->sector = rq->hard_sector; rq->sector = rq->hard_sector;
...@@ -1968,20 +1966,28 @@ int end_that_request_first(struct request *req, int uptodate, int nr_sectors) ...@@ -1968,20 +1966,28 @@ int end_that_request_first(struct request *req, int uptodate, int nr_sectors)
req->errors = 0; req->errors = 0;
if (!uptodate) { if (!uptodate) {
printk("end_request: I/O error, dev %s, sector %llu\n",
kdevname(req->rq_dev), (unsigned long long)req->sector);
error = -EIO; error = -EIO;
if (!(req->flags & REQ_QUIET))
printk("end_request: I/O error, dev %s, sector %llu\n",
kdevname(req->rq_dev),
(unsigned long long)req->sector);
} }
while ((bio = req->bio)) { while ((bio = req->bio)) {
const int nsect = bio_iovec(bio)->bv_len >> 9; int new_bio = 0, nsect;
int new_bio = 0;
if (unlikely(bio->bi_idx >= bio->bi_vcnt)) {
printk("%s: bio idx %d >= vcnt %d\n", __FUNCTION__,
bio->bi_idx, bio->bi_vcnt);
break;
}
BIO_BUG_ON(bio_iovec(bio)->bv_len > bio->bi_size); BIO_BUG_ON(bio_iovec(bio)->bv_len > bio->bi_size);
/* /*
* not a complete bvec done * not a complete bvec done
*/ */
nsect = bio_iovec(bio)->bv_len >> 9;
if (unlikely(nsect > nr_sectors)) { if (unlikely(nsect > nr_sectors)) {
int partial = nr_sectors << 9; int partial = nr_sectors << 9;
......
...@@ -235,6 +235,7 @@ struct request_queue ...@@ -235,6 +235,7 @@ struct request_queue
#define blk_queue_tagged(q) test_bit(QUEUE_FLAG_QUEUED, &(q)->queue_flags) #define blk_queue_tagged(q) test_bit(QUEUE_FLAG_QUEUED, &(q)->queue_flags)
#define blk_queue_empty(q) elv_queue_empty(q) #define blk_queue_empty(q) elv_queue_empty(q)
#define blk_fs_request(rq) ((rq)->flags & REQ_CMD) #define blk_fs_request(rq) ((rq)->flags & REQ_CMD)
#define blk_pc_request(rq) ((rq)->flags & REQ_BLOCK_PC)
#define list_entry_rq(ptr) list_entry((ptr), struct request, queuelist) #define list_entry_rq(ptr) list_entry((ptr), struct request, queuelist)
#define rq_data_dir(rq) ((rq)->flags & 1) #define rq_data_dir(rq) ((rq)->flags & 1)
......
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