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author | Christoph Hellwig <hch@lst.de> | 2017-01-27 09:35:54 +0100 |
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committer | Jens Axboe <axboe@fb.com> | 2017-01-27 15:08:35 -0700 |
commit | 48b77ad6084481ef9330a5d2bee289966da0975b (patch) | |
tree | ec332b20a788843320c1fed26820592793b13fe2 /kernel | |
parent | 6d247d7f71d1fa4b66a5f4da7b1daa21510d529b (diff) | |
download | linux-48b77ad6084481ef9330a5d2bee289966da0975b.tar.gz linux-48b77ad6084481ef9330a5d2bee289966da0975b.tar.bz2 linux-48b77ad6084481ef9330a5d2bee289966da0975b.zip |
block: cleanup tracing
A couple tweaks to the tracing code:
- trace the request size for all requests
- trace request sector and nr_sectors only for fs requests, enforced by
helpers
- drop SCSI CDB tracing - we have SCSI tracing for this and are going
to me the CDB out of the generic struct request soon.
With this the tracing code stops to know about BLOCK_PC requests entirely,
it's just FS vs passthrough requests now, where the latter includes any
driver-private requests.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/trace/blktrace.c | 43 |
1 files changed, 6 insertions, 37 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index 95cecbf67f5c..512b34703ac3 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -712,15 +712,13 @@ static void blk_add_trace_rq(struct request_queue *q, struct request *rq, if (likely(!bt)) return; - if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { + if (rq->cmd_type != REQ_TYPE_FS) what |= BLK_TC_ACT(BLK_TC_PC); - __blk_add_trace(bt, 0, nr_bytes, req_op(rq), rq->cmd_flags, - what, rq->errors, rq->cmd_len, rq->cmd); - } else { + else what |= BLK_TC_ACT(BLK_TC_FS); - __blk_add_trace(bt, blk_rq_pos(rq), nr_bytes, req_op(rq), - rq->cmd_flags, what, rq->errors, 0, NULL); - } + + __blk_add_trace(bt, blk_rq_trace_sector(rq), nr_bytes, req_op(rq), + rq->cmd_flags, what, rq->errors, 0, NULL); } static void blk_add_trace_rq_abort(void *ignore, @@ -972,11 +970,7 @@ void blk_add_driver_data(struct request_queue *q, if (likely(!bt)) return; - if (rq->cmd_type == REQ_TYPE_BLOCK_PC) - __blk_add_trace(bt, 0, blk_rq_bytes(rq), 0, 0, - BLK_TA_DRV_DATA, rq->errors, len, data); - else - __blk_add_trace(bt, blk_rq_pos(rq), blk_rq_bytes(rq), 0, 0, + __blk_add_trace(bt, blk_rq_trace_sector(rq), blk_rq_bytes(rq), 0, 0, BLK_TA_DRV_DATA, rq->errors, len, data); } EXPORT_SYMBOL_GPL(blk_add_driver_data); @@ -1752,31 +1746,6 @@ void blk_trace_remove_sysfs(struct device *dev) #ifdef CONFIG_EVENT_TRACING -void blk_dump_cmd(char *buf, struct request *rq) -{ - int i, end; - int len = rq->cmd_len; - unsigned char *cmd = rq->cmd; - - if (rq->cmd_type != REQ_TYPE_BLOCK_PC) { - buf[0] = '\0'; - return; - } - - for (end = len - 1; end >= 0; end--) - if (cmd[end]) - break; - end++; - - for (i = 0; i < len; i++) { - buf += sprintf(buf, "%s%02x", i == 0 ? "" : " ", cmd[i]); - if (i == end && end != len - 1) { - sprintf(buf, " .."); - break; - } - } -} - void blk_fill_rwbs(char *rwbs, unsigned int op, int bytes) { int i = 0; |