If a PR operation fails we can return a device-specific error which is impossible to handle in some cases because we could have a mix of devices when DM is used, or future users like LIO only knows it's interacting with a block device so it doesn't know the type. This patch adds a new pr_status enum so drivers can convert errors to a common type which can be handled by the caller.
Showing the changes to include/uapi (1 of 1 file). Show all
Unified · Split
| @@ -4,6 +4,23 @@ · 3 unmodified lines | ||
| 4 | 4 | |
| 5 | 5 | #include <linux/types.h> |
| 6 | 6 | |
| 7 | +enum pr_status { | |
| 8 | + PR_STS_SUCCESS = 0x0, | |
| 9 | + /* | |
| 10 | + * The following error codes are based on SCSI, because the interface | |
| 11 | + * was originally created for it and has existing users. | |
| 12 | + */ | |
| 13 | + /* Generic device failure. */ | |
| 14 | + PR_STS_IOERR = 0x2, | |
| 15 | + PR_STS_RESERVATION_CONFLICT = 0x18, | |
| 16 | + /* Temporary path failure that can be retried. */ | |
| 17 | + PR_STS_RETRY_PATH_FAILURE = 0xe0000, | |
| 18 | + /* The request was failed due to a fast failure timer. */ | |
| 19 | + PR_STS_PATH_FAST_FAILED = 0xf0000, | |
| 20 | + /* The path cannot be reached and has been marked as failed. */ | |
| 21 | + PR_STS_PATH_FAILED = 0x10000, | |
| 22 | +}; | |
| 23 | + | |
| 7 | 24 | enum pr_type { |
| 8 | 25 | PR_WRITE_EXCLUSIVE = 1, |
| 9 | 26 | PR_EXCLUSIVE_ACCESS = 2, |