/* * 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 __IOCTL_ #define __IOCTL_ #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_SUBVOL_CREATE_ASYNC (1ULL << 0) #define BTRFS_SUBVOL_NAME_MAX 4039 struct btrfs_ioctl_vol_args_v2 { __s64 fd; __u64 transid; __u64 flags; __u64 unused[4]; char name[BTRFS_SUBVOL_NAME_MAX + 1]; }; #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_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; /* spare for later */ __u32 unused[5]; }; 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]; }; #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) #endif