Btrfs: allow for pausing restriper

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / ioctl.h

diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index 252ae9915de8fcfa4b6b7a3a502735c28d1819f6..e972e11a8d77041bb3dd45807e5e2cc7ed50f8c2 100644 (file)
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -109,6 +109,53 @@ struct btrfs_ioctl_fs_info_args {
        __u64 reserved[124];                    /* pad to 1k */
 };
 
+/* balance control ioctl modes */
+#define BTRFS_BALANCE_CTL_PAUSE                1
+
+/*
+ * this is packed, because it should be exactly the same as its disk
+ * byte order counterpart (struct btrfs_disk_balance_args)
+ */
+struct btrfs_balance_args {
+       __u64 profiles;
+       __u64 usage;
+       __u64 devid;
+       __u64 pstart;
+       __u64 pend;
+       __u64 vstart;
+       __u64 vend;
+
+       __u64 target;
+
+       __u64 flags;
+
+       __u64 unused[8];
+} __attribute__ ((__packed__));
+
+/* report balance progress to userspace */
+struct btrfs_balance_progress {
+       __u64 expected;         /* estimated # of chunks that will be
+                                * relocated to fulfill the request */
+       __u64 considered;       /* # of chunks we have considered so far */
+       __u64 completed;        /* # of chunks relocated so far */
+};
+
+#define BTRFS_BALANCE_STATE_RUNNING    (1ULL << 0)
+#define BTRFS_BALANCE_STATE_PAUSE_REQ  (1ULL << 1)
+
+struct btrfs_ioctl_balance_args {
+       __u64 flags;                            /* in/out */
+       __u64 state;                            /* out */
+
+       struct btrfs_balance_args data;         /* in/out */
+       struct btrfs_balance_args meta;         /* in/out */
+       struct btrfs_balance_args sys;          /* in/out */
+
+       struct btrfs_balance_progress stat;     /* out */
+
+       __u64 unused[72];                       /* pad to 1k */
+};
+
 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
 struct btrfs_ioctl_ino_lookup_args {
        __u64 treeid;
@@ -272,6 +319,9 @@ struct btrfs_ioctl_logical_ino_args {
                                 struct btrfs_ioctl_dev_info_args)
 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
                               struct btrfs_ioctl_fs_info_args)
+#define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
+                                  struct btrfs_ioctl_balance_args)
+#define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
 #define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
                                        struct btrfs_ioctl_ino_path_args)
 #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \