F2FS should understand how the device aliasing file works and support deleting the file after use. A device aliasing file can be created by mkfs.f2fs tool and it can map the whole device with an extent, not using node blocks. The file space should be pinned and normally used for read-only usages.
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| @@ -43,6 +43,7 @@ · 42 unmodified lines | ||
| 43 | 43 | #define F2FS_IOC_DECOMPRESS_FILE _IO(F2FS_IOCTL_MAGIC, 23) |
| 44 | 44 | #define F2FS_IOC_COMPRESS_FILE _IO(F2FS_IOCTL_MAGIC, 24) |
| 45 | 45 | #define F2FS_IOC_START_ATOMIC_REPLACE _IO(F2FS_IOCTL_MAGIC, 25) |
| 46 | +#define F2FS_IOC_GET_DEV_ALIAS_FILE _IOR(F2FS_IOCTL_MAGIC, 26, __u32) | |
| 46 | 47 | |
| 47 | 48 | /* |
| 48 | 49 | * should be same as XFS_IOC_GOINGDOWN. |