cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/linux/btrfs.h

/*
 * 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

#define BTRFS_LABEL_SIZE 256

/* 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_DEVICE_SPEC_BY_ID		(1ULL << 3)


#define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED		\
			(BTRFS_SUBVOL_CREATE_ASYNC |    \
                        BTRFS_SUBVOL_RDONLY |           \
                        BTRFS_SUBVOL_QGROUP_INHERIT |   \
                        BTRFS_DEVICE_SPEC_BY_ID)


#define BTRFS_FSID_SIZE 16

#define BTRFS_UUID_SIZE 16

#define BTRFS_UUID_UNPARSED_SIZE	37

/*
 * flags definition for qgroup limits
 *
 * Used by:
 * struct btrfs_qgroup_limit.flags
 * struct btrfs_qgroup_limit_item.flags
 */

#define BTRFS_QGROUP_LIMIT_MAX_RFER	(1ULL << 0)

#define BTRFS_QGROUP_LIMIT_MAX_EXCL	(1ULL << 1)

#define BTRFS_QGROUP_LIMIT_RSV_RFER	(1ULL << 2)

#define BTRFS_QGROUP_LIMIT_RSV_EXCL	(1ULL << 3)

#define BTRFS_QGROUP_LIMIT_RFER_CMPR	(1ULL << 4)

#define BTRFS_QGROUP_LIMIT_EXCL_CMPR	(1ULL << 5)


struct btrfs_qgroup_limit {
	
__u64	flags;
	
__u64	max_rfer;
	
__u64	max_excl;
	
__u64	rsv_rfer;
	
__u64	rsv_excl;
};

/*
 * flags definition for qgroup inheritance
 *
 * Used by:
 * struct btrfs_qgroup_inherit.flags
 */

#define BTRFS_QGROUP_INHERIT_SET_LIMITS	(1ULL << 0)


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;
};

/*
 * flags for subvolumes
 *
 * Used by:
 * struct btrfs_ioctl_vol_args_v2.flags
 *
 * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:
 * - BTRFS_IOC_SUBVOL_GETFLAGS
 * - BTRFS_IOC_SUBVOL_SETFLAGS
 */

#define BTRFS_SUBVOL_CREATE_ASYNC	(1ULL << 0)

#define BTRFS_SUBVOL_RDONLY		(1ULL << 1)

#define BTRFS_SUBVOL_QGROUP_INHERIT	(1ULL << 2)


#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];
	};
	union {
		
char name[BTRFS_SUBVOL_NAME_MAX + 1];
		
__u64 devid;
	};
};

/*
 * 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

#define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS		3

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 */
	
__u32 nodesize;				/* out */
	
__u32 sectorsize;			/* out */
	
__u32 clone_alignment;			/* out */
	
__u32 reserved32;
	
__u64 reserved[122];			/* pad to 1k */
};

/*
 * feature flags
 *
 * Used by:
 * struct btrfs_ioctl_feature_flags
 */

#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE		(1ULL << 0)
/*
 * Older kernels (< 4.9) on big-endian systems produced broken free space tree
 * bitmaps, and btrfs-progs also used to corrupt the free space tree (versions
 * < 4.7.3).  If this bit is clear, then the free space tree cannot be trusted.
 * btrfs-progs can also intentionally clear this bit to ask the kernel to
 * rebuild the free space tree, however this might not work on older kernels
 * that do not know about this bit. If not sure, clear the cache manually on
 * first mount when booting older kernel versions.
 */

#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID	(1ULL << 1)


#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF	(1ULL << 0)

#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL	(1ULL << 1)

#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS	(1ULL << 2)

#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO	(1ULL << 3)
/*
 * some patches floated around with a second compression method
 * lets save that incompat here for when they do get in
 * Note we don't actually support it, we're just reserving the
 * number
 */

#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2	(1ULL << 4)

/*
 * older kernels tried to do bigger metadata blocks, but the
 * code was pretty buggy.  Lets not let them try anymore.
 */

#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA	(1ULL << 5)


#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF	(1ULL << 6)

#define BTRFS_FEATURE_INCOMPAT_RAID56		(1ULL << 7)

#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA	(1ULL << 8)

#define BTRFS_FEATURE_INCOMPAT_NO_HOLES		(1ULL << 9)


struct btrfs_ioctl_feature_flags {
	
__u64 compat_flags;
	
__u64 compat_ro_flags;
	
__u64 incompat_flags;
};

/* 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;
	union {
		
__u64 usage;
		struct {
			
__u32 usage_min;
			
__u32 usage_max;
		};
	};
	
__u64 devid;
	
__u64 pstart;
	
__u64 pend;
	
__u64 vstart;
	
__u64 vend;

	
__u64 target;

	
__u64 flags;

	/*
         * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
         * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
         * and maximum
         */
	union {
		
__u64 limit;		/* limit number of processed chunks */
		struct {
			
__u32 limit_min;
			
__u32 limit_max;
		};
	};

	/*
         * Process chunks that cross stripes_min..stripes_max devices,
         * BTRFS_BALANCE_ARGS_STRIPES_RANGE
         */
	
__u32 stripes_min;
	
__u32 stripes_max;

	
__u64 unused[6];
} __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 */
};

/*
 * flags definition for balance
 *
 * Restriper's general type filter
 *
 * Used by:
 * btrfs_ioctl_balance_args.flags
 * btrfs_balance_control.flags (internal)
 */

#define BTRFS_BALANCE_DATA		(1ULL << 0)

#define BTRFS_BALANCE_SYSTEM		(1ULL << 1)

#define BTRFS_BALANCE_METADATA		(1ULL << 2)


#define BTRFS_BALANCE_TYPE_MASK		(BTRFS_BALANCE_DATA |       \
                                         BTRFS_BALANCE_SYSTEM |     \
                                         BTRFS_BALANCE_METADATA)


#define BTRFS_BALANCE_FORCE		(1ULL << 3)

#define BTRFS_BALANCE_RESUME		(1ULL << 4)

/*
 * flags definitions for per-type balance args
 *
 * Balance filters
 *
 * Used by:
 * struct btrfs_balance_args
 */

#define BTRFS_BALANCE_ARGS_PROFILES	(1ULL << 0)

#define BTRFS_BALANCE_ARGS_USAGE	(1ULL << 1)

#define BTRFS_BALANCE_ARGS_DEVID	(1ULL << 2)

#define BTRFS_BALANCE_ARGS_DRANGE	(1ULL << 3)

#define BTRFS_BALANCE_ARGS_VRANGE	(1ULL << 4)

#define BTRFS_BALANCE_ARGS_LIMIT	(1ULL << 5)

#define BTRFS_BALANCE_ARGS_LIMIT_RANGE	(1ULL << 6)

#define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)

#define BTRFS_BALANCE_ARGS_USAGE_RANGE	(1ULL << 10)


#define BTRFS_BALANCE_ARGS_MASK			\
	(BTRFS_BALANCE_ARGS_PROFILES |          \
         BTRFS_BALANCE_ARGS_USAGE |             \
         BTRFS_BALANCE_ARGS_DEVID |             \
         BTRFS_BALANCE_ARGS_DRANGE |            \
         BTRFS_BALANCE_ARGS_VRANGE |            \
         BTRFS_BALANCE_ARGS_LIMIT |             \
         BTRFS_BALANCE_ARGS_LIMIT_RANGE |       \
         BTRFS_BALANCE_ARGS_STRIPES_RANGE |     \
         BTRFS_BALANCE_ARGS_USAGE_RANGE)

/*
 * Profile changing flags.  When SOFT is set we won't relocate chunk if
 * it already has the target profile (even though it may be
 * half-filled).
 */

#define BTRFS_BALANCE_ARGS_CONVERT	(1ULL << 8)

#define BTRFS_BALANCE_ARGS_SOFT		(1ULL << 9)


/*
 * flags definition for balance state
 *
 * Used by:
 * struct btrfs_ioctl_balance_args.state
 */

#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_search_args_v2 {
	
struct btrfs_ioctl_search_key key; /* in/out - search parameters */
	
__u64 buf_size;		   /* in - size of buffer
                                            * out - on EOVERFLOW: needed size
                                            *       to store item */
	
__u64 buf[0];                       /* out - found items */
};


struct btrfs_ioctl_clone_range_args {
  
__s64 src_fd;
  

__u64 src_offset, src_length;
  
__u64 dest_offset;
};

/*
 * flags definition for the defrag range ioctl
 *
 * Used by:
 * struct btrfs_ioctl_defrag_range_args.flags
 */

#define BTRFS_DEFRAG_RANGE_COMPRESS 1

#define BTRFS_DEFRAG_RANGE_START_IO 2

struct btrfs_ioctl_defrag_range_args {
	/* start of the defrag operation */
	
__u64 start;

	/* number of bytes to defrag, use (u64)-1 to say all */
	
__u64 len;

	/*
         * flags for the operation, which can include turning
         * on compression for this one defrag
         */
	
__u64 flags;

	/*
         * any extent bigger than this will be considered
         * already defragged.  Use 0 to take the kernel default
         * Use 1 to say every single extent must be rewritten
         */
	
__u32 extent_thresh;

	/*
         * which compression method to use if turning on compression
         * for this defrag operation.  If unspecified, zlib will
         * be used
         */
	
__u32 compress_type;

	/* spare for later */
	
__u32 unused[4];
};



#define BTRFS_SAME_DATA_DIFFERS	1
/* For extent-same ioctl */

struct btrfs_ioctl_same_extent_info {
	
__s64 fd;		/* in - destination file */
	
__u64 logical_offset;	/* in - start of extent in destination */
	
__u64 bytes_deduped;	/* out - total # of bytes we were able
                                 * to dedupe from this file */
	/* status of this dedupe operation:
         * 0 if dedup succeeds
         * < 0 for error
         * == BTRFS_SAME_DATA_DIFFERS if data differs
         */
	
__s32 status;		/* out - see above description */
	
__u32 reserved;
};


struct btrfs_ioctl_same_args {
	
__u64 logical_offset;	/* in - start of extent in source */
	
__u64 length;		/* in - length of extent */
	
__u16 dest_count;	/* in - total elements in info array */
	
__u16 reserved1;
	
__u32 reserved2;
	
struct btrfs_ioctl_same_extent_info info[0];
};


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__NOTUSED	3

struct btrfs_ioctl_quota_ctl_args {
	
__u64 cmd;
	
__u64 status;
};


struct btrfs_ioctl_quota_rescan_args {
	
__u64	flags;
	
__u64   progress;
	
__u64   reserved[6];
};


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

/*
 * Do not add the leading stream header. Used when multiple snapshots
 * are sent back to back.
 */

#define BTRFS_SEND_FLAG_OMIT_STREAM_HEADER	0x2

/*
 * Omit the command at the end of the stream that indicated the end
 * of the stream. This option is used when multiple snapshots are
 * sent back to back.
 */

#define BTRFS_SEND_FLAG_OMIT_END_CMD		0x4


#define BTRFS_SEND_FLAG_MASK \
	(BTRFS_SEND_FLAG_NO_FILE_DATA | \
         BTRFS_SEND_FLAG_OMIT_STREAM_HEADER | \
         BTRFS_SEND_FLAG_OMIT_END_CMD)


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 */
};

/* Error codes as returned by the kernel */

enum btrfs_err_code {
	
BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET = 1,
	
BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
	
BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
	
BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
	
BTRFS_ERROR_DEV_TGT_REPLACE,
	
BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
	
BTRFS_ERROR_DEV_ONLY_WRITABLE,
	
BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS
};


#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_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
                                           struct btrfs_ioctl_search_args_v2)

#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_logical_ino_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_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
                               struct btrfs_ioctl_quota_rescan_args)

#define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
                               struct btrfs_ioctl_quota_rescan_args)

#define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)

#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)

#define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \
                                         struct btrfs_ioctl_same_args)

#define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
                                   struct btrfs_ioctl_feature_flags)

#define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
                                   struct btrfs_ioctl_feature_flags[2])

#define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
                                   struct btrfs_ioctl_feature_flags[3])

#define BTRFS_IOC_RM_DEV_V2 _IOW(BTRFS_IOCTL_MAGIC, 58, \
                                   struct btrfs_ioctl_vol_args_v2)

#endif /* _UAPI_LINUX_BTRFS_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Jan Schmidt24314.10%56.49%
Chris Mason22913.28%1215.58%
Jeff Mahoney22713.17%79.09%
Stefan Behrens22513.05%56.49%
Arne Jansen21612.53%56.49%
Ilya Dryomov1347.77%45.19%
Alexander Block975.63%45.19%
Mark Fasheh694.00%22.60%
David Sterba593.42%67.79%
Sage Weil543.13%67.79%
Anand Jain412.38%33.90%
Josef Bacik382.20%33.90%
Gerhard Heift251.45%11.30%
Li Zefan241.39%22.60%
Jie Liu80.46%22.60%
Gabríel Arthúr Pétursson60.35%11.30%
Hans van Kranenburg60.35%22.60%
Filipe Brandenburger60.35%11.30%
Omar Sandoval50.29%11.30%
Eryu Guan40.23%11.30%
Zheng Yan40.23%11.30%
Satoru Takeuchi20.12%11.30%
Mike Frysinger10.06%11.30%
Vinson Lee10.06%11.30%
Total1724100.00%77100.00%
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