| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame^] | 1 | What: /sys/block/loopX/loop/autoclear |
| 2 | Date: Aug, 2010 |
| 3 | KernelVersion: v2.6.37 |
| 4 | Contact: linux-block@vger.kernel.org |
| 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: linux-block@vger.kernel.org |
| 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: linux-block@vger.kernel.org |
| 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: linux-block@vger.kernel.org |
| 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: linux-block@vger.kernel.org |
| 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: linux-block@vger.kernel.org |
| 48 | Description: |
| 49 | (RO) Shows if direct IO is being used to access backing file or |
| 50 | not ("1 or "0"). |