Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next into for-linus-3.9

Signed-off-by: Chris Mason <chris.mason@fusionio.com>

Conflicts:
	fs/btrfs/disk-io.c

2 files changed, 515 insertions, 0 deletions

diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 4e67194fd2c3..5c8a1d25e21c 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -68,6 +68,7 @@ header-y += blkpg.h
 header-y += blktrace_api.h
 header-y += bpqether.h
 header-y += bsg.h
+header-y += btrfs.h
 header-y += can.h
 header-y += capability.h
 header-y += capi.h
diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
new file mode 100644
index 000000000000..fa3a5f9338fc
--- /dev/null
+++ b/include/uapi/linux/btrfs.h
@@ -0,0 +1,514 @@
+/*
+ * Copyright (C) 2007 Oracle.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef _UAPI_LINUX_BTRFS_H
+#define _UAPI_LINUX_BTRFS_H
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+#define BTRFS_IOCTL_MAGIC 0x94
+#define BTRFS_VOL_NAME_MAX 255
+
+/* this should be 4k */
+#define BTRFS_PATH_NAME_MAX 4087
+struct btrfs_ioctl_vol_args {
+        __s64 fd;
+        char name[BTRFS_PATH_NAME_MAX + 1];
+};
+
+#define BTRFS_DEVICE_PATH_NAME_MAX 1024
+
+#define BTRFS_SUBVOL_CREATE_ASYNC       (1ULL << 0)
+#define BTRFS_SUBVOL_RDONLY             (1ULL << 1)
+#define BTRFS_SUBVOL_QGROUP_INHERIT     (1ULL << 2)
+#define BTRFS_FSID_SIZE 16
+#define BTRFS_UUID_SIZE 16
+
+#define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)
+
+struct btrfs_qgroup_limit {
+        __u64   flags;
+        __u64   max_rfer;
+        __u64   max_excl;
+        __u64   rsv_rfer;
+        __u64   rsv_excl;
+};
+
+struct btrfs_qgroup_inherit {
+        __u64   flags;
+        __u64   num_qgroups;
+        __u64   num_ref_copies;
+        __u64   num_excl_copies;
+        struct btrfs_qgroup_limit lim;
+        __u64   qgroups[0];
+};
+
+struct btrfs_ioctl_qgroup_limit_args {
+        __u64   qgroupid;
+        struct btrfs_qgroup_limit lim;
+};
+
+#define BTRFS_SUBVOL_NAME_MAX 4039
+struct btrfs_ioctl_vol_args_v2 {
+        __s64 fd;
+        __u64 transid;
+        __u64 flags;
+        union {
+                struct {
+                        __u64 size;
+                        struct btrfs_qgroup_inherit __user *qgroup_inherit;
+                };
+                __u64 unused[4];
+        };
+        char name[BTRFS_SUBVOL_NAME_MAX + 1];
+};
+
+/*
+ * structure to report errors and progress to userspace, either as a
+ * result of a finished scrub, a canceled scrub or a progress inquiry
+ */
+struct btrfs_scrub_progress {
+        __u64 data_extents_scrubbed;    /* # of data extents scrubbed */
+        __u64 tree_extents_scrubbed;    /* # of tree extents scrubbed */
+        __u64 data_bytes_scrubbed;      /* # of data bytes scrubbed */
+        __u64 tree_bytes_scrubbed;      /* # of tree bytes scrubbed */
+        __u64 read_errors;              /* # of read errors encountered (EIO) */
+        __u64 csum_errors;              /* # of failed csum checks */
+        __u64 verify_errors;            /* # of occurences, where the metadata
+                                         * of a tree block did not match the
+                                         * expected values, like generation or
+                                         * logical */
+        __u64 no_csum;                  /* # of 4k data block for which no csum
+                                         * is present, probably the result of
+                                         * data written with nodatasum */
+        __u64 csum_discards;            /* # of csum for which no data was found
+                                         * in the extent tree. */
+        __u64 super_errors;             /* # of bad super blocks encountered */
+        __u64 malloc_errors;            /* # of internal kmalloc errors. These
+                                         * will likely cause an incomplete
+                                         * scrub */
+        __u64 uncorrectable_errors;     /* # of errors where either no intact
+                                         * copy was found or the writeback
+                                         * failed */
+        __u64 corrected_errors;         /* # of errors corrected */
+        __u64 last_physical;            /* last physical address scrubbed. In
+                                         * case a scrub was aborted, this can
+                                         * be used to restart the scrub */
+        __u64 unverified_errors;        /* # of occurences where a read for a
+                                         * full (64k) bio failed, but the re-
+                                         * check succeeded for each 4k piece.
+                                         * Intermittent error. */
+};
+
+#define BTRFS_SCRUB_READONLY    1
+struct btrfs_ioctl_scrub_args {
+        __u64 devid;                            /* in */
+        __u64 start;                            /* in */
+        __u64 end;                              /* in */
+        __u64 flags;                            /* in */
+        struct btrfs_scrub_progress progress;   /* out */
+        /* pad to 1k */
+        __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 */
+        __u64 cont_reading_from_srcdev_mode;    /* in, see #define
+                                                 * above */
+        __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1];       /* in */
+        __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1];       /* in */
+};
+
+#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];
+};
+
+struct btrfs_ioctl_dev_info_args {
+        __u64 devid;                            /* in/out */
+        __u8 uuid[BTRFS_UUID_SIZE];             /* in/out */
+        __u64 bytes_used;                       /* out */
+        __u64 total_bytes;                      /* out */
+        __u64 unused[379];                      /* pad to 4k */
+        __u8 path[BTRFS_DEVICE_PATH_NAME_MAX];  /* out */
+};
+
+struct btrfs_ioctl_fs_info_args {
+        __u64 max_id;                           /* out */
+        __u64 num_devices;                      /* out */
+        __u8 fsid[BTRFS_FSID_SIZE];             /* out */
+        __u64 reserved[124];                    /* pad to 1k */
+};
+
+/* balance control ioctl modes */
+#define BTRFS_BALANCE_CTL_PAUSE         1
+#define BTRFS_BALANCE_CTL_CANCEL        2
+
+/*
+ * 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)
+#define BTRFS_BALANCE_STATE_CANCEL_REQ  (1ULL << 2)
+
+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;
+        __u64 objectid;
+        char name[BTRFS_INO_LOOKUP_PATH_MAX];
+};
+
+struct btrfs_ioctl_search_key {
+        /* which root are we searching.  0 is the tree of tree roots */
+        __u64 tree_id;
+
+        /* keys returned will be >= min and <= max */
+        __u64 min_objectid;
+        __u64 max_objectid;
+
+        /* keys returned will be >= min and <= max */
+        __u64 min_offset;
+        __u64 max_offset;
+
+        /* max and min transids to search for */
+        __u64 min_transid;
+        __u64 max_transid;
+
+        /* keys returned will be >= min and <= max */
+        __u32 min_type;
+        __u32 max_type;
+
+        /*
+         * how many items did userland ask for, and how many are we
+         * returning
+         */
+        __u32 nr_items;
+
+        /* align to 64 bits */
+        __u32 unused;
+
+        /* some extra for later */
+        __u64 unused1;
+        __u64 unused2;
+        __u64 unused3;
+        __u64 unused4;
+};
+
+struct btrfs_ioctl_search_header {
+        __u64 transid;
+        __u64 objectid;
+        __u64 offset;
+        __u32 type;
+        __u32 len;
+};
+
+#define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
+/*
+ * the buf is an array of search headers where
+ * each header is followed by the actual item
+ * the type field is expanded to 32 bits for alignment
+ */
+struct btrfs_ioctl_search_args {
+        struct btrfs_ioctl_search_key key;
+        char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
+};
+
+struct btrfs_ioctl_clone_range_args {
+  __s64 src_fd;
+  __u64 src_offset, src_length;
+  __u64 dest_offset;
+};
+
+/* flags for the defrag range ioctl */
+#define BTRFS_DEFRAG_RANGE_COMPRESS 1
+#define BTRFS_DEFRAG_RANGE_START_IO 2
+
+struct btrfs_ioctl_space_info {
+        __u64 flags;
+        __u64 total_bytes;
+        __u64 used_bytes;
+};
+
+struct btrfs_ioctl_space_args {
+        __u64 space_slots;
+        __u64 total_spaces;
+        struct btrfs_ioctl_space_info spaces[0];
+};
+
+struct btrfs_data_container {
+        __u32   bytes_left;     /* out -- bytes not needed to deliver output */
+        __u32   bytes_missing;  /* out -- additional bytes needed for result */
+        __u32   elem_cnt;       /* out */
+        __u32   elem_missed;    /* out */
+        __u64   val[0];         /* out */
+};
+
+struct btrfs_ioctl_ino_path_args {
+        __u64                           inum;           /* in */
+        __u64                           size;           /* in */
+        __u64                           reserved[4];
+        /* struct btrfs_data_container  *fspath;           out */
+        __u64                           fspath;         /* out */
+};
+
+struct btrfs_ioctl_logical_ino_args {
+        __u64                           logical;        /* in */
+        __u64                           size;           /* in */
+        __u64                           reserved[4];
+        /* struct btrfs_data_container  *inodes;        out   */
+        __u64                           inodes;
+};
+
+enum btrfs_dev_stat_values {
+        /* disk I/O failure stats */
+        BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
+        BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
+        BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
+
+        /* stats for indirect indications for I/O failures */
+        BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
+                                         * contents is illegal: this is an
+                                         * indication that the block was damaged
+                                         * during read or write, or written to
+                                         * wrong location or read from wrong
+                                         * location */
+        BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
+                                         * been written */
+
+        BTRFS_DEV_STAT_VALUES_MAX
+};
+
+/* Reset statistics after reading; needs SYS_ADMIN capability */
+#define BTRFS_DEV_STATS_RESET           (1ULL << 0)
+
+struct btrfs_ioctl_get_dev_stats {
+        __u64 devid;                            /* in */
+        __u64 nr_items;                         /* in/out */
+        __u64 flags;                            /* in/out */
+
+        /* out values: */
+        __u64 values[BTRFS_DEV_STAT_VALUES_MAX];
+
+        __u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX]; /* pad to 1k */
+};
+
+#define BTRFS_QUOTA_CTL_ENABLE  1
+#define BTRFS_QUOTA_CTL_DISABLE 2
+#define BTRFS_QUOTA_CTL_RESCAN  3
+struct btrfs_ioctl_quota_ctl_args {
+        __u64 cmd;
+        __u64 status;
+};
+
+struct btrfs_ioctl_qgroup_assign_args {
+        __u64 assign;
+        __u64 src;
+        __u64 dst;
+};
+
+struct btrfs_ioctl_qgroup_create_args {
+        __u64 create;
+        __u64 qgroupid;
+};
+struct btrfs_ioctl_timespec {
+        __u64 sec;
+        __u32 nsec;
+};
+
+struct btrfs_ioctl_received_subvol_args {
+        char    uuid[BTRFS_UUID_SIZE];  /* in */
+        __u64   stransid;               /* in */
+        __u64   rtransid;               /* out */
+        struct btrfs_ioctl_timespec stime; /* in */
+        struct btrfs_ioctl_timespec rtime; /* out */
+        __u64   flags;                  /* in */
+        __u64   reserved[16];           /* in */
+};
+
+/*
+ * Caller doesn't want file data in the send stream, even if the
+ * search of clone sources doesn't find an extent. UPDATE_EXTENT
+ * commands will be sent instead of WRITE commands.
+ */
+#define BTRFS_SEND_FLAG_NO_FILE_DATA     0x1
+
+struct btrfs_ioctl_send_args {
+        __s64 send_fd;                  /* in */
+        __u64 clone_sources_count;      /* in */
+        __u64 __user *clone_sources;    /* in */
+        __u64 parent_root;              /* in */
+        __u64 flags;                    /* in */
+        __u64 reserved[4];              /* in */
+};
+
+#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
+                                   struct btrfs_ioctl_vol_args)
+#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
+                                   struct btrfs_ioctl_vol_args)
+#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
+                                   struct btrfs_ioctl_vol_args)
+#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
+                                   struct btrfs_ioctl_vol_args)
+/* trans start and trans end are dangerous, and only for
+ * use by applications that know how to avoid the
+ * resulting deadlocks
+ */
+#define BTRFS_IOC_TRANS_START  _IO(BTRFS_IOCTL_MAGIC, 6)
+#define BTRFS_IOC_TRANS_END    _IO(BTRFS_IOCTL_MAGIC, 7)
+#define BTRFS_IOC_SYNC         _IO(BTRFS_IOCTL_MAGIC, 8)
+
+#define BTRFS_IOC_CLONE        _IOW(BTRFS_IOCTL_MAGIC, 9, int)
+#define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
+                                   struct btrfs_ioctl_vol_args)
+#define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
+                                   struct btrfs_ioctl_vol_args)
+#define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
+                                   struct btrfs_ioctl_vol_args)
+
+#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
+                                  struct btrfs_ioctl_clone_range_args)
+
+#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
+                                   struct btrfs_ioctl_vol_args)
+#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
+                                struct btrfs_ioctl_vol_args)
+#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
+                                struct btrfs_ioctl_defrag_range_args)
+#define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
+                                   struct btrfs_ioctl_search_args)
+#define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
+                                   struct btrfs_ioctl_ino_lookup_args)
+#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
+#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
+                                    struct btrfs_ioctl_space_args)
+#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
+#define BTRFS_IOC_WAIT_SYNC  _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
+#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
+                                   struct btrfs_ioctl_vol_args_v2)
+#define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \
+                                   struct btrfs_ioctl_vol_args_v2)
+#define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
+#define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
+#define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
+                              struct btrfs_ioctl_scrub_args)
+#define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
+#define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
+                                       struct btrfs_ioctl_scrub_args)
+#define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
+                                 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_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
+                                        struct btrfs_ioctl_balance_args)
+#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, \
+                                        struct btrfs_ioctl_ino_path_args)
+#define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
+                                struct btrfs_ioctl_received_subvol_args)
+#define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args)
+#define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
+                                     struct btrfs_ioctl_vol_args)
+#define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \
+                               struct btrfs_ioctl_quota_ctl_args)
+#define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \
+                               struct btrfs_ioctl_qgroup_assign_args)
+#define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \
+                               struct btrfs_ioctl_qgroup_create_args)
+#define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
+                               struct btrfs_ioctl_qgroup_limit_args)
+#define BTRFS_IOC_GET_FSLABEL _IOR(BTRFS_IOCTL_MAGIC, 49, \
+                                   char[BTRFS_LABEL_SIZE])
+#define BTRFS_IOC_SET_FSLABEL _IOW(BTRFS_IOCTL_MAGIC, 50, \
+                                   char[BTRFS_LABEL_SIZE])
+#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 /* _UAPI_LINUX_BTRFS_H */