From: Omar Sandoval <osandov@osandov.com>
To: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
James Bottomley <James.Bottomley@HansenPartnership.com>,
Omar Sandoval <osandov@fb.com>, Hannes Reinecke <hare@suse.com>,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH v5 10/10] scsi: Implement blk_mq_ops.show_rq()
Date: Tue, 25 Apr 2017 14:39:56 -0700 [thread overview]
Message-ID: <20170425213956.GD6361@vader> (raw)
In-Reply-To: <20170425203745.19946-11-bart.vanassche@sandisk.com>
On Tue, Apr 25, 2017 at 01:37:45PM -0700, Bart Van Assche wrote:
> Show the SCSI CDB, .eh_eflags and .result for pending SCSI commands
> in /sys/kernel/debug/block/*/mq/*/dispatch and */rq_list.
Only thing I noticed was that the only other caller I see has buf[70].
No idea if that's a meaningful number. For the sake of this not getting
bike-shedded to death,
Reviewed-by: Omar Sandoval <osandov@fb.com>
> Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
> Cc: Martin K. Petersen <martin.petersen@oracle.com>
> Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
> Cc: Omar Sandoval <osandov@fb.com>
> Cc: Hannes Reinecke <hare@suse.com>
> Cc: <linux-scsi@vger.kernel.org>
> ---
> drivers/scsi/Makefile | 1 +
> drivers/scsi/scsi_debugfs.c | 13 +++++++++++++
> drivers/scsi/scsi_debugfs.h | 4 ++++
> drivers/scsi/scsi_lib.c | 4 ++++
> 4 files changed, 22 insertions(+)
> create mode 100644 drivers/scsi/scsi_debugfs.c
> create mode 100644 drivers/scsi/scsi_debugfs.h
>
> diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
> index fc2855565a51..93dbe58c47c8 100644
> --- a/drivers/scsi/Makefile
> +++ b/drivers/scsi/Makefile
> @@ -166,6 +166,7 @@ scsi_mod-y += scsi_scan.o scsi_sysfs.o scsi_devinfo.o
> scsi_mod-$(CONFIG_SCSI_NETLINK) += scsi_netlink.o
> scsi_mod-$(CONFIG_SYSCTL) += scsi_sysctl.o
> scsi_mod-$(CONFIG_SCSI_PROC_FS) += scsi_proc.o
> +scsi_mod-$(CONFIG_BLK_DEBUG_FS) += scsi_debugfs.o
> scsi_mod-y += scsi_trace.o scsi_logging.o
> scsi_mod-$(CONFIG_PM) += scsi_pm.o
> scsi_mod-$(CONFIG_SCSI_DH) += scsi_dh.o
> diff --git a/drivers/scsi/scsi_debugfs.c b/drivers/scsi/scsi_debugfs.c
> new file mode 100644
> index 000000000000..f831c23fdee3
> --- /dev/null
> +++ b/drivers/scsi/scsi_debugfs.c
> @@ -0,0 +1,13 @@
> +#include <linux/seq_file.h>
> +#include <scsi/scsi_cmnd.h>
> +#include <scsi/scsi_dbg.h>
> +#include "scsi_debugfs.h"
> +
> +void scsi_show_rq(struct seq_file *m, struct request *rq)
> +{
> + struct scsi_cmnd *cmd = container_of(scsi_req(rq), typeof(*cmd), req);
> + char buf[64];
> +
> + __scsi_format_command(buf, sizeof(buf), cmd->cmnd, cmd->cmd_len);
> + seq_printf(m, ", .cmd=%s", buf);
> +}
> diff --git a/drivers/scsi/scsi_debugfs.h b/drivers/scsi/scsi_debugfs.h
> new file mode 100644
> index 000000000000..951b043e82d0
> --- /dev/null
> +++ b/drivers/scsi/scsi_debugfs.h
> @@ -0,0 +1,4 @@
> +struct request;
> +struct seq_file;
> +
> +void scsi_show_rq(struct seq_file *m, struct request *rq);
> diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
> index abc391e00f7d..1c3e87d6c48f 100644
> --- a/drivers/scsi/scsi_lib.c
> +++ b/drivers/scsi/scsi_lib.c
> @@ -34,6 +34,7 @@
>
> #include <trace/events/scsi.h>
>
> +#include "scsi_debugfs.h"
> #include "scsi_priv.h"
> #include "scsi_logging.h"
>
> @@ -2157,6 +2158,9 @@ static const struct blk_mq_ops scsi_mq_ops = {
> .queue_rq = scsi_queue_rq,
> .complete = scsi_softirq_done,
> .timeout = scsi_timeout,
> +#ifdef CONFIG_BLK_DEBUG_FS
> + .show_rq = scsi_show_rq,
> +#endif
> .init_request = scsi_init_request,
> .exit_request = scsi_exit_request,
> .map_queues = scsi_map_queues,
> --
> 2.12.2
>
next prev parent reply other threads:[~2017-04-25 21:39 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-25 20:37 [PATCH v5 00/10] blk-mq debugfs patches for kernel v4.12 Bart Van Assche
2017-04-25 20:37 ` [PATCH v5 01/10] blk-mq: Register <dev>/queue/mq after having registered <dev>/queue Bart Van Assche
2017-04-25 20:37 ` [PATCH v5 02/10] blk-mq: Let blk_mq_debugfs_register() look up the queue name Bart Van Assche
2017-04-25 20:37 ` [PATCH v5 03/10] blk-mq-debugfs: Rename functions for registering and unregistering the mq directory Bart Van Assche
2017-04-25 20:37 ` [PATCH v5 04/10] blk-mq: Only unregister hctxs for which registration succeeded Bart Van Assche
2017-04-25 21:18 ` Omar Sandoval
2017-04-25 20:37 ` [PATCH v5 05/10] blk-mq: Unregister debugfs attributes earlier Bart Van Assche
2017-04-25 21:30 ` Omar Sandoval
2017-04-25 21:41 ` Jens Axboe
2017-04-26 20:38 ` Bart Van Assche
2017-04-25 22:24 ` Bart Van Assche
2017-04-25 22:29 ` Jens Axboe
2017-04-25 22:30 ` Omar Sandoval
2017-04-26 20:32 ` Bart Van Assche
2017-04-26 20:37 ` Jens Axboe
2017-04-26 20:37 ` Omar Sandoval
2017-04-25 20:37 ` [PATCH v5 06/10] blk-mq: Move the "state" debugfs attribute one level down Bart Van Assche
2017-04-25 20:37 ` [PATCH v5 07/10] blk-mq: Make blk_flags_show() callers append a newline character Bart Van Assche
2017-04-25 20:37 ` [PATCH v5 08/10] blk-mq: Show operation, cmd_flags and rq_flags names Bart Van Assche
2017-04-25 20:37 ` [PATCH v5 09/10] blk-mq: Add blk_mq_ops.show_rq() Bart Van Assche
2017-04-25 21:35 ` Omar Sandoval
2017-04-25 20:37 ` [PATCH v5 10/10] scsi: Implement blk_mq_ops.show_rq() Bart Van Assche
2017-04-25 20:37 ` Bart Van Assche
2017-04-25 21:39 ` Omar Sandoval [this message]
2017-04-25 22:06 ` Bart Van Assche
2017-04-25 22:06 ` Bart Van Assche
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170425213956.GD6361@vader \
--to=osandov@osandov.com \
--cc=James.Bottomley@HansenPartnership.com \
--cc=axboe@kernel.dk \
--cc=bart.vanassche@sandisk.com \
--cc=hare@suse.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=osandov@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.