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ANDROID: dm-bow: Add ABI documentation

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Add description of sysfs files

Test: none
Bug: 210958368
Change-Id: I8ddb678e0e0f1dbbcfb9455d6e17b726337d585c
Signed-off-by: Paul Lawrence <paullawrence@google.com>
This commit is contained in:
Paul Lawrence
2023-01-31 14:32:51 -08:00
parent f6908a0d69
commit 7a7986f840
1 changed files with 19 additions and 0 deletions
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Documentation/ABI/testing/dm-bow Normal file
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What: /sys/block/dm-<num>/bow/free
Date: January 2023
KernelVersion: 5.15
Contact: paullawrence@google.com
Description: free space
Free space on device in bytes. Only valid in state 0
Users: Android vold to determine if there is sufficient space for expected size
of checksum
What: /sys/block/dm-<num>/bow/state
Date: January 2023
KernelVersion: 5.15
Contact: paullawrence@google.com
Description: dm-bow state
Read-write string containing 0, 1 or 2
0: Trim mode
1: Checkpoint mode
2: Committed mode
See Documentation/device-mapper/dm-bow for details