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| author | Christian Brauner <brauner@kernel.org> | 2025-07-01 14:00:21 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-07-01 14:00:21 +0200 |
| commit | 4a3def74d9810f4d4148a3aa17b76d2f0c0f6109 (patch) | |
| tree | 643256afb25f0f9f8bf6972b7aee919a1a7eed56 /include/uapi | |
| parent | 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 (diff) | |
| parent | 9eb22f7fedfc9eb1b7f431a5359abd4d15b0b0cd (diff) | |
Merge patch series "add ioctl to query metadata and protection info capabilities"
Anuj Gupta <anuj20.g@samsung.com> says:
This patch series adds a new ioctl to query metadata and integrity
capability.
* patches from https://lore.kernel.org/20250630090548.3317-1-anuj20.g@samsung.com:
fs: add ioctl to query metadata and protection info capabilities
nvme: set pi_offset only when checksum type is not BLK_INTEGRITY_CSUM_NONE
block: introduce pi_tuple_size field in blk_integrity
block: rename tuple_size field in blk_integrity to metadata_size
Link: https://lore.kernel.org/20250630090548.3317-1-anuj20.g@samsung.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/fs.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 0098b0ce8ccb..83720a2fd20d 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -91,6 +91,63 @@ struct fs_sysfs_path { __u8 name[128]; }; +/* Protection info capability flags */ +#define LBMD_PI_CAP_INTEGRITY (1 << 0) +#define LBMD_PI_CAP_REFTAG (1 << 1) + +/* Checksum types for Protection Information */ +#define LBMD_PI_CSUM_NONE 0 +#define LBMD_PI_CSUM_IP 1 +#define LBMD_PI_CSUM_CRC16_T10DIF 2 +#define LBMD_PI_CSUM_CRC64_NVME 4 + +/* sizeof first published struct */ +#define LBMD_SIZE_VER0 16 + +/* + * Logical block metadata capability descriptor + * If the device does not support metadata, all the fields will be zero. + * Applications must check lbmd_flags to determine whether metadata is + * supported or not. + */ +struct logical_block_metadata_cap { + /* Bitmask of logical block metadata capability flags */ + __u32 lbmd_flags; + /* + * The amount of data described by each unit of logical block + * metadata + */ + __u16 lbmd_interval; + /* + * Size in bytes of the logical block metadata associated with each + * interval + */ + __u8 lbmd_size; + /* + * Size in bytes of the opaque block tag associated with each + * interval + */ + __u8 lbmd_opaque_size; + /* + * Offset in bytes of the opaque block tag within the logical block + * metadata + */ + __u8 lbmd_opaque_offset; + /* Size in bytes of the T10 PI tuple associated with each interval */ + __u8 lbmd_pi_size; + /* Offset in bytes of T10 PI tuple within the logical block metadata */ + __u8 lbmd_pi_offset; + /* T10 PI guard tag type */ + __u8 lbmd_guard_tag_type; + /* Size in bytes of the T10 PI application tag */ + __u8 lbmd_app_tag_size; + /* Size in bytes of the T10 PI reference tag */ + __u8 lbmd_ref_tag_size; + /* Size in bytes of the T10 PI storage tag */ + __u8 lbmd_storage_tag_size; + __u8 pad; +}; + /* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */ #define FILE_DEDUPE_RANGE_SAME 0 #define FILE_DEDUPE_RANGE_DIFFERS 1 @@ -247,6 +304,8 @@ struct fsxattr { * also /sys/kernel/debug/ for filesystems with debugfs exports */ #define FS_IOC_GETFSSYSFSPATH _IOR(0x15, 1, struct fs_sysfs_path) +/* Get logical block metadata capability details */ +#define FS_IOC_GETLBMD_CAP _IOWR(0x15, 2, struct logical_block_metadata_cap) /* * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS) |