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Date: Wed, 14 Feb 2018 20:38:25 +0530 From: Aishwarya Pant <aishpant@...il.com> To: linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>, Greg KH <gregkh@...uxfoundation.org> Cc: Julia Lawall <julia.lawall@...6.fr> Subject: [PATCH] block/loop: add documentation for sysfs interface Documentation has been compiled from git logs and by reading through code. Signed-off-by: Aishwarya Pant <aishpant@...il.com> --- For drivers/block/loop.c, I don't see any maintainers or mailing lists except for LKML. 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: linux-block@...r.kernel.org +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: linux-block@...r.kernel.org +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: linux-block@...r.kernel.org +Description: + (RO) Start offset (in bytes). + +What: /sys/block/loopX/loop/sizelimit +Date: Aug, 2010 +KernelVersion: v2.6.37 +Contact: linux-block@...r.kernel.org +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: linux-block@...r.kernel.org +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: linux-block@...r.kernel.org +Description: + (RO) Shows if direct IO is being used to access backing file or + not ("1 or "0"). -- 2.16.1
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