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1 What:           /sys/block/loopX/loop/autoclear
2 Date:           Aug, 2010
3 KernelVersion:  v2.6.37
4 Contact:        [email protected]
5 Description:
6                 (RO) Shows if the device is in autoclear mode or not ( "1" or
7                 "0"). Autoclear (if set) indicates that the loopback device will
8                 self-distruct after last close.
9
10 What:           /sys/block/loopX/loop/backing_file
11 Date:           Aug, 2010
12 KernelVersion:  v2.6.37
13 Contact:        [email protected]
14 Description:
15                 (RO) The path of the backing file that the loop device maps its
16                 data blocks to.
17
18 What:           /sys/block/loopX/loop/offset
19 Date:           Aug, 2010
20 KernelVersion:  v2.6.37
21 Contact:        [email protected]
22 Description:
23                 (RO) Start offset (in bytes).
24
25 What:           /sys/block/loopX/loop/sizelimit
26 Date:           Aug, 2010
27 KernelVersion:  v2.6.37
28 Contact:        [email protected]
29 Description:
30                 (RO) The size (in bytes) that the block device maps, starting
31                 from the offset.
32
33 What:           /sys/block/loopX/loop/partscan
34 Date:           Aug, 2011
35 KernelVersion:  v3.10
36 Contact:        [email protected]
37 Description:
38                 (RO) Shows if automatic partition scanning is enabled for the
39                 device or not ("1" or "0"). This can be requested individually
40                 per loop device during its setup by setting LO_FLAGS_PARTSCAN in
41                 in the ioctl request. By default, no partition tables are
42                 scanned.
43
44 What:           /sys/block/loopX/loop/dio
45 Date:           Aug, 2015
46 KernelVersion:  v4.10
47 Contact:        [email protected]
48 Description:
49                 (RO) Shows if direct IO is being used to access backing file or
50                 not ("1 or "0").
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