mirror of
https://github.com/Zygo/bees.git
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8cbd6fc67a
Automatically fall back to LOGICAL_INO if LOGICAL_INO_V2 fails and no _V2 flags are used. Add methods to set the flags argument with build portability to older headers. Use thread_local storage for the somewhat large buffers used by LOGICAL_INO_V2 (and other users of BtrfsDataContainer like INO_PATHS). Signed-off-by: Zygo Blaxell <bees@furryterror.org>
211 lines
6.2 KiB
C
211 lines
6.2 KiB
C
#ifndef CRUCIBLE_BTRFS_H
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#define CRUCIBLE_BTRFS_H
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// Copied from Linux kernel sources as of 3.15 or so.
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// These are probably missing from /usr/include at the moment.
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// NULL
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#include <cstdio>
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// _IOWR macro and friends
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#include <asm-generic/ioctl.h>
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// __u64 typedef and friends
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#include <linux/types.h>
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// try Linux headers first
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#include <btrfs/ioctl.h>
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// Supply any missing definitions
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#define mutex not_mutex
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#include <btrfs/ctree.h>
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// Repair the damage
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#undef min
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#undef max
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#undef mutex
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#ifndef BTRFS_FIRST_FREE_OBJECTID
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#define BTRFS_ROOT_TREE_OBJECTID 1ULL
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#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
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#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
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#define BTRFS_DEV_TREE_OBJECTID 4ULL
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#define BTRFS_FS_TREE_OBJECTID 5ULL
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#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
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#define BTRFS_CSUM_TREE_OBJECTID 7ULL
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#define BTRFS_QUOTA_TREE_OBJECTID 8ULL
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#define BTRFS_UUID_TREE_OBJECTID 9ULL
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#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
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#define BTRFS_BALANCE_OBJECTID -4ULL
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#define BTRFS_ORPHAN_OBJECTID -5ULL
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#define BTRFS_TREE_LOG_OBJECTID -6ULL
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#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
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#define BTRFS_TREE_RELOC_OBJECTID -8ULL
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#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
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#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
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#define BTRFS_FREE_SPACE_OBJECTID -11ULL
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#define BTRFS_FREE_INO_OBJECTID -12ULL
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#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
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#define BTRFS_FIRST_FREE_OBJECTID 256ULL
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#define BTRFS_LAST_FREE_OBJECTID -256ULL
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#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
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#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
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#define BTRFS_INODE_ITEM_KEY 1
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#define BTRFS_INODE_REF_KEY 12
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#define BTRFS_INODE_EXTREF_KEY 13
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#define BTRFS_XATTR_ITEM_KEY 24
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#define BTRFS_ORPHAN_ITEM_KEY 48
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#define BTRFS_DIR_LOG_ITEM_KEY 60
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#define BTRFS_DIR_LOG_INDEX_KEY 72
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#define BTRFS_DIR_ITEM_KEY 84
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#define BTRFS_DIR_INDEX_KEY 96
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#define BTRFS_EXTENT_DATA_KEY 108
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#define BTRFS_CSUM_ITEM_KEY 120
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#define BTRFS_EXTENT_CSUM_KEY 128
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#define BTRFS_ROOT_ITEM_KEY 132
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#define BTRFS_ROOT_BACKREF_KEY 144
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#define BTRFS_ROOT_REF_KEY 156
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#define BTRFS_EXTENT_ITEM_KEY 168
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#define BTRFS_METADATA_ITEM_KEY 169
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#define BTRFS_TREE_BLOCK_REF_KEY 176
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#define BTRFS_EXTENT_DATA_REF_KEY 178
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#define BTRFS_EXTENT_REF_V0_KEY 180
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#define BTRFS_SHARED_BLOCK_REF_KEY 182
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#define BTRFS_SHARED_DATA_REF_KEY 184
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#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
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#define BTRFS_FREE_SPACE_INFO_KEY 198
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#define BTRFS_FREE_SPACE_EXTENT_KEY 199
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#define BTRFS_FREE_SPACE_BITMAP_KEY 200
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#define BTRFS_DEV_EXTENT_KEY 204
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#define BTRFS_DEV_ITEM_KEY 216
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#define BTRFS_CHUNK_ITEM_KEY 228
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#define BTRFS_BALANCE_ITEM_KEY 248
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#define BTRFS_QGROUP_STATUS_KEY 240
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#define BTRFS_QGROUP_INFO_KEY 242
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#define BTRFS_QGROUP_LIMIT_KEY 244
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#define BTRFS_QGROUP_RELATION_KEY 246
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#define BTRFS_DEV_STATS_KEY 249
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#define BTRFS_DEV_REPLACE_KEY 250
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#define BTRFS_UUID_KEY_SUBVOL 251
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#define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252
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#define BTRFS_STRING_ITEM_KEY 253
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#endif
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#ifndef BTRFS_DEFRAG_RANGE_START_IO
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// For some reason uapi has BTRFS_DEFRAG_RANGE_COMPRESS and
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// BTRFS_DEFRAG_RANGE_START_IO but not btrfs_ioctl_defrag_range_args
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// Never mind, it's too broken to be useful anyway
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struct btrfs_ioctl_defrag_range_args {
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/* start of the defrag operation */
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__u64 start;
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/* number of bytes to defrag, use (u64)-1 to say all */
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__u64 len;
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/*
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* flags for the operation, which can include turning
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* on compression for this one defrag
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*/
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__u64 flags;
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/*
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* any extent bigger than this will be considered
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* already defragged. Use 0 to take the kernel default
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* Use 1 to say every single extent must be rewritten
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*/
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__u32 extent_thresh;
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/*
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* which compression method to use if turning on compression
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* for this defrag operation. If unspecified, zlib will
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* be used
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*/
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__u32 compress_type;
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/* spare for later */
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__u32 unused[4];
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};
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#endif
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#ifndef BTRFS_IOC_CLONE_RANGE
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struct btrfs_ioctl_clone_range_args {
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__s64 src_fd;
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__u64 src_offset, src_length;
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__u64 dest_offset;
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};
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// We definitely have this
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#define BTRFS_IOCTL_MAGIC 0x94
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#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
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#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
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struct btrfs_ioctl_clone_range_args)
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#endif
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#ifndef BTRFS_SAME_DATA_DIFFERS
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#define BTRFS_SAME_DATA_DIFFERS 1
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/* For extent-same ioctl */
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struct btrfs_ioctl_same_extent_info {
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__s64 fd; /* in - destination file */
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__u64 logical_offset; /* in - start of extent in destination */
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__u64 bytes_deduped; /* out - total # of bytes we were able
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* to dedupe from this file */
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/* status of this dedupe operation:
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* 0 if dedup succeeds
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* < 0 for error
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* == BTRFS_SAME_DATA_DIFFERS if data differs
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*/
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__s32 status; /* out - see above description */
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__u32 reserved;
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};
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struct btrfs_ioctl_same_args {
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__u64 logical_offset; /* in - start of extent in source */
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__u64 length; /* in - length of extent */
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__u16 dest_count; /* in - total elements in info array */
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__u16 reserved1;
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__u32 reserved2;
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struct btrfs_ioctl_same_extent_info info[0];
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};
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#define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \
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struct btrfs_ioctl_same_args)
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#endif
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#ifndef BTRFS_MAX_DEDUPE_LEN
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#define BTRFS_MAX_DEDUPE_LEN (16 * 1024 * 1024)
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#endif
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#ifndef BTRFS_IOC_TREE_SEARCH_V2
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/*
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* Extended version of TREE_SEARCH ioctl that can return more than 4k of bytes.
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* The allocated size of the buffer is set in buf_size.
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*/
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struct btrfs_ioctl_search_args_v2 {
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struct btrfs_ioctl_search_key key; /* in/out - search parameters */
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__u64 buf_size; /* in - size of buffer
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* out - on EOVERFLOW: needed size
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* to store item */
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__u64 buf[0]; /* out - found items */
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};
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#define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
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struct btrfs_ioctl_search_args_v2)
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#endif
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#ifndef BTRFS_IOC_LOGICAL_INO_V2
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#define BTRFS_IOC_LOGICAL_INO_V2 _IOWR(BTRFS_IOCTL_MAGIC, 59, struct btrfs_ioctl_logical_ino_args)
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#define BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET (1ULL << 0)
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#endif
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#endif // CRUCIBLE_BTRFS_H
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