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180bb60cde
Define a local copy of the header that has fields for the csum type and length, so we can build in places that haven't caught up to kernel 5.5 headers yet. The reason why the csum type and length are not unconditionally filled in eludes me. csum_length is necessarily non-zero, and the cost of the conditional is worse than the cost of the copy, so the whole flags dance is a WTF...but it's part of the kernel API now, so it's too late to NAK it. Signed-off-by: Zygo Blaxell <bees@furryterror.org>
232 lines
7.0 KiB
C
232 lines
7.0 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 crc32c
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#undef min
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#undef max
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#undef mutex
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#undef swap
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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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#ifndef BTRFS_FS_INFO_FLAG_CSUM_INFO
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/* Request information about checksum type and size */
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#define BTRFS_FS_INFO_FLAG_CSUM_INFO (1 << 0)
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#endif
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struct btrfs_ioctl_fs_info_args_v2 {
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__u64 max_id; /* out */
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__u64 num_devices; /* out */
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__u8 fsid[BTRFS_FSID_SIZE]; /* out */
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__u32 nodesize; /* out */
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__u32 sectorsize; /* out */
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__u32 clone_alignment; /* out */
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/* See BTRFS_FS_INFO_FLAG_* */
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__u16 csum_type; /* out */
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__u16 csum_size; /* out */
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__u64 flags; /* in/out */
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__u8 reserved[968]; /* pad to 1k */
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};
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#endif // CRUCIBLE_BTRFS_H
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