2018-02-17 06:14:09

by Aishwarya Pant

Subject: [PATCH v2] block/loop: add documentation for sysfs interface

Documentation has been compiled from git logs and by reading through
code.

Signed-off-by: Aishwarya Pant <[email protected]>
---
For drivers/block/loop.c, I don't see any maintainers or mailing lists except
for LKML. I am guessing linux-block mailing list should be okay.

Changes in v2:
- Add [email protected] to the recipient list.

Documentation/ABI/testing/sysfs-block-loop | 50 ++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-block-loop

diff --git a/Documentation/ABI/testing/sysfs-block-loop b/Documentation/ABI/testing/sysfs-block-loop
new file mode 100644
index 000000000000..627f4eb87286
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-block-loop
@@ -0,0 +1,50 @@
+What: /sys/block/loopX/loop/autoclear
+Date: Aug, 2010
+KernelVersion: v2.6.37
+Contact: [email protected]
+Description:
+ (RO) Shows if the device is in autoclear mode or not ( "1" or
+ "0"). Autoclear (if set) indicates that the loopback device will
+ self-distruct after last close.
+
+What: /sys/block/loopX/loop/backing_file
+Date: Aug, 2010
+KernelVersion: v2.6.37
+Contact: [email protected]
+Description:
+ (RO) The path of the backing file that the loop device maps its
+ data blocks to.
+
+What: /sys/block/loopX/loop/offset
+Date: Aug, 2010
+KernelVersion: v2.6.37
+Contact: [email protected]
+Description:
+ (RO) Start offset (in bytes).
+
+What: /sys/block/loopX/loop/sizelimit
+Date: Aug, 2010
+KernelVersion: v2.6.37
+Contact: [email protected]
+Description:
+ (RO) The size (in bytes) that the block device maps, starting
+ from the offset.
+
+What: /sys/block/loopX/loop/partscan
+Date: Aug, 2011
+KernelVersion: v3.10
+Contact: [email protected]
+Description:
+ (RO) Shows if automatic partition scanning is enabled for the
+ device or not ("1" or "0"). This can be requested individually
+ per loop device during its setup by setting LO_FLAGS_PARTSCAN in
+ in the ioctl request. By default, no partition tables are
+ scanned.
+
+What: /sys/block/loopX/loop/dio
+Date: Aug, 2015
+KernelVersion: v4.10
+Contact: [email protected]
+Description:
+ (RO) Shows if direct IO is being used to access backing file or
+ not ("1 or "0").
--
2.16.1

2018-02-23 15:22:31

by Jonathan Corbet

Subject: Re: [PATCH v2] block/loop: add documentation for sysfs interface

On Sat, 17 Feb 2018 11:43:04 +0530
Aishwarya Pant <[email protected]> wrote:

> Documentation has been compiled from git logs and by reading through
> code.
>
> Signed-off-by: Aishwarya Pant <[email protected]>
> ---
> For drivers/block/loop.c, I don't see any maintainers or mailing lists except
> for LKML. I am guessing linux-block mailing list should be okay.
>
> Changes in v2:
> - Add [email protected] to the recipient list.

Applied to the docs tree, thanks.

jon