Btrfs: add new sources for device replace code
This adds a new file to the sources together with the header file
and the changes to ioctl.h and ctree.h that are required by the
new C source file. Additionally, 4 new functions are added to
volume.c that deal with device creation and destruction.
Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index 731e287..62006ba 100644
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -123,6 +123,48 @@
__u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
};
+#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
+#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
+struct btrfs_ioctl_dev_replace_start_params {
+ __u64 srcdevid; /* in, if 0, use srcdev_name instead */
+ __u8 srcdev_name[BTRFS_PATH_NAME_MAX + 1]; /* in */
+ __u8 tgtdev_name[BTRFS_PATH_NAME_MAX + 1]; /* in */
+ __u64 cont_reading_from_srcdev_mode; /* in, see #define
+ * above */
+};
+
+#define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED 0
+#define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED 1
+#define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED 2
+#define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED 3
+#define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED 4
+struct btrfs_ioctl_dev_replace_status_params {
+ __u64 replace_state; /* out, see #define above */
+ __u64 progress_1000; /* out, 0 <= x <= 1000 */
+ __u64 time_started; /* out, seconds since 1-Jan-1970 */
+ __u64 time_stopped; /* out, seconds since 1-Jan-1970 */
+ __u64 num_write_errors; /* out */
+ __u64 num_uncorrectable_read_errors; /* out */
+};
+
+#define BTRFS_IOCTL_DEV_REPLACE_CMD_START 0
+#define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS 1
+#define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL 2
+#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR 0
+#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED 1
+#define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED 2
+struct btrfs_ioctl_dev_replace_args {
+ __u64 cmd; /* in */
+ __u64 result; /* out */
+
+ union {
+ struct btrfs_ioctl_dev_replace_start_params start;
+ struct btrfs_ioctl_dev_replace_status_params status;
+ }; /* in/out */
+
+ __u64 spare[64];
+};
+
#define BTRFS_DEVICE_PATH_NAME_MAX 1024
struct btrfs_ioctl_dev_info_args {
__u64 devid; /* in/out */
@@ -453,4 +495,7 @@
struct btrfs_ioctl_qgroup_limit_args)
#define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
struct btrfs_ioctl_get_dev_stats)
+#define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
+ struct btrfs_ioctl_dev_replace_args)
+
#endif