From f5c0b0910ac4c1bc93474d7593cc73622fdfc822 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Thu, 30 Mar 2017 11:21:27 -0700 Subject: [PATCH] blk-mq: Show symbolic names for hctx state and flags Instead of showing the hctx state and flags as numbers, show the names of the flags. Signed-off-by: Bart Van Assche Cc: Omar Sandoval Cc: Hannes Reinecke Signed-off-by: Jens Axboe --- block/blk-mq-debugfs.c | 37 ++++++++++++++++++++++++++++++++++--- 1 file changed, 34 insertions(+), 3 deletions(-) diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index b25c76a..df9b688 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -182,11 +182,19 @@ static const struct file_operations queue_poll_stat_fops = { .release = single_release, }; +static const char *const hctx_state_name[] = { + [BLK_MQ_S_STOPPED] = "STOPPED", + [BLK_MQ_S_TAG_ACTIVE] = "TAG_ACTIVE", + [BLK_MQ_S_SCHED_RESTART] = "SCHED_RESTART", + [BLK_MQ_S_TAG_WAITING] = "TAG_WAITING", + +}; static int hctx_state_show(struct seq_file *m, void *v) { struct blk_mq_hw_ctx *hctx = m->private; - seq_printf(m, "0x%lx\n", hctx->state); + blk_flags_show(m, hctx->state, hctx_state_name, + ARRAY_SIZE(hctx_state_name)); return 0; } @@ -202,11 +210,34 @@ static const struct file_operations hctx_state_fops = { .release = single_release, }; +static const char *const alloc_policy_name[] = { + [BLK_TAG_ALLOC_FIFO] = "fifo", + [BLK_TAG_ALLOC_RR] = "rr", +}; + +static const char *const hctx_flag_name[] = { + [ilog2(BLK_MQ_F_SHOULD_MERGE)] = "SHOULD_MERGE", + [ilog2(BLK_MQ_F_TAG_SHARED)] = "TAG_SHARED", + [ilog2(BLK_MQ_F_SG_MERGE)] = "SG_MERGE", + [ilog2(BLK_MQ_F_BLOCKING)] = "BLOCKING", + [ilog2(BLK_MQ_F_NO_SCHED)] = "NO_SCHED", +}; + static int hctx_flags_show(struct seq_file *m, void *v) { struct blk_mq_hw_ctx *hctx = m->private; - - seq_printf(m, "0x%lx\n", hctx->flags); + const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags); + + seq_puts(m, "alloc_policy="); + if (alloc_policy < ARRAY_SIZE(alloc_policy_name) && + alloc_policy_name[alloc_policy]) + seq_puts(m, alloc_policy_name[alloc_policy]); + else + seq_printf(m, "%d", alloc_policy); + seq_puts(m, " "); + blk_flags_show(m, + hctx->flags ^ BLK_ALLOC_POLICY_TO_MQ_FLAG(alloc_policy), + hctx_flag_name, ARRAY_SIZE(hctx_flag_name)); return 0; } -- 2.7.4