From: Aishwarya Pant <aishpant@gmail.com>
To: Thomas Maier <balagi@justmail.de>,
Jonathan Corbet <corbet@lwn.net>,
Greg KH <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, linux-block@vger.kernel.org
Cc: Julia Lawall <julia.lawall@lip6.fr>
Subject: [PATCH] Documentation/ABI: clean up sysfs-class-pktcdvd
Date: Tue, 23 Jan 2018 14:40:32 +0530 [thread overview]
Message-ID: <20180123091032.GA18947@mordor.localdomain> (raw)
Clean up the sysfs documentation such that it is in the same format as
described in Documentation/ABI/README. Mainly, the patch moves the
attribute names to the 'What:' field. This might be useful for scripting
and tracking changes in the ABI.
Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
---
Documentation/ABI/testing/sysfs-class-pktcdvd | 122 +++++++++++++++-----------
1 file changed, 71 insertions(+), 51 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-class-pktcdvd b/Documentation/ABI/testing/sysfs-class-pktcdvd
index b1c3f0263359..e85ec99c6e31 100644
--- a/Documentation/ABI/testing/sysfs-class-pktcdvd
+++ b/Documentation/ABI/testing/sysfs-class-pktcdvd
@@ -1,60 +1,80 @@
-What: /sys/class/pktcdvd/
+sysfs interface
+---------------
+The pktcdvd module (packet writing driver) creates the following files in the
+sysfs: (<devid> is in format major:minor)
+
+What: /sys/class/pktcdvd/add
+What: /sys/class/pktcdvd/remove
+What: /sys/class/pktcdvd/device_map
Date: Oct. 2006
KernelVersion: 2.6.20
Contact: Thomas Maier <balagi@justmail.de>
Description:
-sysfs interface
----------------
+ add: (WO) Write a block device id (major:minor) to create
+ a new pktcdvd device and map it to the block device.
+
+ remove: (WO) Write the pktcdvd device id (major:minor) to it to
+ remove the pktcdvd device.
+
+ device_map: (RO) Shows the device mapping in format:
+ pktcdvd[0-7] <pktdevid> <blkdevid>
+
+
+What: /sys/class/pktcdvd/pktcdvd[0-7]/dev
+What: /sys/class/pktcdvd/pktcdvd[0-7]/uevent
+Date: Oct. 2006
+KernelVersion: 2.6.20
+Contact: Thomas Maier <balagi@justmail.de>
+Description:
+ dev: (RO) Device id
+
+ uevent: (WO) To send an uevent
+
+
+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/packets_started
+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/packets_finished
+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/kb_written
+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/kb_read
+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/kb_read_gather
+What: /sys/class/pktcdvd/pktcdvd[0-7]/stat/reset
+Date: Oct. 2006
+KernelVersion: 2.6.20
+Contact: Thomas Maier <balagi@justmail.de>
+Description:
+ packets_started: (RO) Number of started packets.
+
+ packets_finished: (RO) Number of finished packets.
+
+ kb_written: (RO) kBytes written.
+
+ kb_read: (RO) kBytes read.
+
+ kb_read_gather: (RO) kBytes read to fill write packets.
+
+ reset: (WO) Write any value to it to reset pktcdvd
+ device statistic values, like bytes
+ read/written.
+
+
+What: /sys/class/pktcdvd/pktcdvd[0-7]/write_queue/size
+What: /sys/class/pktcdvd/pktcdvd[0-7]/write_queue/congestion_off
+What: /sys/class/pktcdvd/pktcdvd[0-7]/write_queue/congestion_on
+Date: Oct. 2006
+KernelVersion: 2.6.20
+Contact: Thomas Maier <balagi@justmail.de>
+Description:
+ size: (RO) Contains the size of the bio write queue.
+
+ congestion_off: (RW) If bio write queue size is below this mark,
+ accept new bio requests from the block layer.
-The pktcdvd module (packet writing driver) creates
-these files in the sysfs:
-(<devid> is in format major:minor )
-
-/sys/class/pktcdvd/
- add (0200) Write a block device id (major:minor)
- to create a new pktcdvd device and map
- it to the block device.
-
- remove (0200) Write the pktcdvd device id (major:minor)
- to it to remove the pktcdvd device.
-
- device_map (0444) Shows the device mapping in format:
- pktcdvd[0-7] <pktdevid> <blkdevid>
-
-/sys/class/pktcdvd/pktcdvd[0-7]/
- dev (0444) Device id
- uevent (0200) To send an uevent.
-
-/sys/class/pktcdvd/pktcdvd[0-7]/stat/
- packets_started (0444) Number of started packets.
- packets_finished (0444) Number of finished packets.
-
- kb_written (0444) kBytes written.
- kb_read (0444) kBytes read.
- kb_read_gather (0444) kBytes read to fill write packets.
-
- reset (0200) Write any value to it to reset
- pktcdvd device statistic values, like
- bytes read/written.
-
-/sys/class/pktcdvd/pktcdvd[0-7]/write_queue/
- size (0444) Contains the size of the bio write
- queue.
-
- congestion_off (0644) If bio write queue size is below
- this mark, accept new bio requests
- from the block layer.
-
- congestion_on (0644) If bio write queue size is higher
- as this mark, do no longer accept
- bio write requests from the block
- layer and wait till the pktcdvd
- device has processed enough bio's
- so that bio write queue size is
- below congestion off mark.
- A value of <= 0 disables congestion
- control.
+ congestion_on: (RW) If bio write queue size is higher as this
+ mark, do no longer accept bio write requests
+ from the block layer and wait till the pktcdvd
+ device has processed enough bio's so that bio
+ write queue size is below congestion off mark.
+ A value of <= 0 disables congestion control.
Example:
--
2.16.1
next reply other threads:[~2018-01-23 9:10 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-23 9:10 Aishwarya Pant [this message]
2018-01-23 9:13 ` [PATCH] Documentation/ABI: clean up sysfs-class-pktcdvd Julia Lawall
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=20180123091032.GA18947@mordor.localdomain \
--to=aishpant@gmail.com \
--cc=balagi@justmail.de \
--cc=corbet@lwn.net \
--cc=gregkh@linuxfoundation.org \
--cc=julia.lawall@lip6.fr \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox