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| author | Omar Sandoval <osandov@fb.com> | 2017-01-25 08:06:41 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-01-27 08:17:44 -0700 |
| commit | 9abb2ad21e8b9b7a2555411fbee225a508cf962d (patch) | |
| tree | f08b9b296ac05657625ac4c26caffbd53e0258da /block | |
| parent | 07e4fead45e6e1932f0b960655ab554b6aab6a08 (diff) | |
| download | linux-0-day-9abb2ad21e8b9b7a2555411fbee225a508cf962d.tar.gz linux-0-day-9abb2ad21e8b9b7a2555411fbee225a508cf962d.tar.xz | |
blk-mq: add hctx->{state,flags} to debugfs
hctx->state could come in handy for bugs where the hardware queue gets
stuck in the stopped state, and hctx->flags is just useful to know.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq-debugfs.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index 01711bbf5adec..0c14511fa9e05 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -29,7 +29,49 @@ struct blk_mq_debugfs_attr { static struct dentry *block_debugfs_root; +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); + return 0; +} + +static int hctx_state_open(struct inode *inode, struct file *file) +{ + return single_open(file, hctx_state_show, inode->i_private); +} + +static const struct file_operations hctx_state_fops = { + .open = hctx_state_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +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); + return 0; +} + +static int hctx_flags_open(struct inode *inode, struct file *file) +{ + return single_open(file, hctx_flags_show, inode->i_private); +} + +static const struct file_operations hctx_flags_fops = { + .open = hctx_flags_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = { + {"state", 0400, &hctx_state_fops}, + {"flags", 0400, &hctx_flags_fops}, }; static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = { |