diff options
Diffstat (limited to 'original/uapi/linux/btrfs.h')
| -rw-r--r-- | original/uapi/linux/btrfs.h | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/original/uapi/linux/btrfs.h b/original/uapi/linux/btrfs.h index d956b29..7386199 100644 --- a/original/uapi/linux/btrfs.h +++ b/original/uapi/linux/btrfs.h @@ -309,7 +309,6 @@ struct btrfs_ioctl_fs_info_args { #define BTRFS_FEATURE_INCOMPAT_METADATA_UUID (1ULL << 10) #define BTRFS_FEATURE_INCOMPAT_RAID1C34 (1ULL << 11) #define BTRFS_FEATURE_INCOMPAT_ZONED (1ULL << 12) -#define BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2 (1ULL << 13) struct btrfs_ioctl_feature_flags { __u64 compat_flags; @@ -869,134 +868,6 @@ struct btrfs_ioctl_get_subvol_rootref_args { __u8 align[7]; }; -/* - * Data and metadata for an encoded read or write. - * - * Encoded I/O bypasses any encoding automatically done by the filesystem (e.g., - * compression). This can be used to read the compressed contents of a file or - * write pre-compressed data directly to a file. - * - * BTRFS_IOC_ENCODED_READ and BTRFS_IOC_ENCODED_WRITE are essentially - * preadv/pwritev with additional metadata about how the data is encoded and the - * size of the unencoded data. - * - * BTRFS_IOC_ENCODED_READ fills the given iovecs with the encoded data, fills - * the metadata fields, and returns the size of the encoded data. It reads one - * extent per call. It can also read data which is not encoded. - * - * BTRFS_IOC_ENCODED_WRITE uses the metadata fields, writes the encoded data - * from the iovecs, and returns the size of the encoded data. Note that the - * encoded data is not validated when it is written; if it is not valid (e.g., - * it cannot be decompressed), then a subsequent read may return an error. - * - * Since the filesystem page cache contains decoded data, encoded I/O bypasses - * the page cache. Encoded I/O requires CAP_SYS_ADMIN. - */ -struct btrfs_ioctl_encoded_io_args { - /* Input parameters for both reads and writes. */ - - /* - * iovecs containing encoded data. - * - * For reads, if the size of the encoded data is larger than the sum of - * iov[n].iov_len for 0 <= n < iovcnt, then the ioctl fails with - * ENOBUFS. - * - * For writes, the size of the encoded data is the sum of iov[n].iov_len - * for 0 <= n < iovcnt. This must be less than 128 KiB (this limit may - * increase in the future). This must also be less than or equal to - * unencoded_len. - */ - const struct iovec __user *iov; - /* Number of iovecs. */ - unsigned long iovcnt; - /* - * Offset in file. - * - * For writes, must be aligned to the sector size of the filesystem. - */ - __s64 offset; - /* Currently must be zero. */ - __u64 flags; - - /* - * For reads, the following members are output parameters that will - * contain the returned metadata for the encoded data. - * For writes, the following members must be set to the metadata for the - * encoded data. - */ - - /* - * Length of the data in the file. - * - * Must be less than or equal to unencoded_len - unencoded_offset. For - * writes, must be aligned to the sector size of the filesystem unless - * the data ends at or beyond the current end of the file. - */ - __u64 len; - /* - * Length of the unencoded (i.e., decrypted and decompressed) data. - * - * For writes, must be no more than 128 KiB (this limit may increase in - * the future). If the unencoded data is actually longer than - * unencoded_len, then it is truncated; if it is shorter, then it is - * extended with zeroes. - */ - __u64 unencoded_len; - /* - * Offset from the first byte of the unencoded data to the first byte of - * logical data in the file. - * - * Must be less than unencoded_len. - */ - __u64 unencoded_offset; - /* - * BTRFS_ENCODED_IO_COMPRESSION_* type. - * - * For writes, must not be BTRFS_ENCODED_IO_COMPRESSION_NONE. - */ - __u32 compression; - /* Currently always BTRFS_ENCODED_IO_ENCRYPTION_NONE. */ - __u32 encryption; - /* - * Reserved for future expansion. - * - * For reads, always returned as zero. Users should check for non-zero - * bytes. If there are any, then the kernel has a newer version of this - * structure with additional information that the user definition is - * missing. - * - * For writes, must be zeroed. - */ - __u8 reserved[64]; -}; - -/* Data is not compressed. */ -#define BTRFS_ENCODED_IO_COMPRESSION_NONE 0 -/* Data is compressed as a single zlib stream. */ -#define BTRFS_ENCODED_IO_COMPRESSION_ZLIB 1 -/* - * Data is compressed as a single zstd frame with the windowLog compression - * parameter set to no more than 17. - */ -#define BTRFS_ENCODED_IO_COMPRESSION_ZSTD 2 -/* - * Data is compressed sector by sector (using the sector size indicated by the - * name of the constant) with LZO1X and wrapped in the format documented in - * fs/btrfs/lzo.c. For writes, the compression sector size must match the - * filesystem sector size. - */ -#define BTRFS_ENCODED_IO_COMPRESSION_LZO_4K 3 -#define BTRFS_ENCODED_IO_COMPRESSION_LZO_8K 4 -#define BTRFS_ENCODED_IO_COMPRESSION_LZO_16K 5 -#define BTRFS_ENCODED_IO_COMPRESSION_LZO_32K 6 -#define BTRFS_ENCODED_IO_COMPRESSION_LZO_64K 7 -#define BTRFS_ENCODED_IO_COMPRESSION_TYPES 8 - -/* Data is not encrypted. */ -#define BTRFS_ENCODED_IO_ENCRYPTION_NONE 0 -#define BTRFS_ENCODED_IO_ENCRYPTION_TYPES 1 - /* Error codes as returned by the kernel */ enum btrfs_err_code { BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET = 1, @@ -1125,9 +996,5 @@ enum btrfs_err_code { struct btrfs_ioctl_ino_lookup_user_args) #define BTRFS_IOC_SNAP_DESTROY_V2 _IOW(BTRFS_IOCTL_MAGIC, 63, \ struct btrfs_ioctl_vol_args_v2) -#define BTRFS_IOC_ENCODED_READ _IOR(BTRFS_IOCTL_MAGIC, 64, \ - struct btrfs_ioctl_encoded_io_args) -#define BTRFS_IOC_ENCODED_WRITE _IOW(BTRFS_IOCTL_MAGIC, 64, \ - struct btrfs_ioctl_encoded_io_args) #endif /* _UAPI_LINUX_BTRFS_H */ |