diff options
Diffstat (limited to 'include/uapi/linux/raid')
| -rw-r--r-- | include/uapi/linux/raid/md_p.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/uapi/linux/raid/md_p.h b/include/uapi/linux/raid/md_p.h index fe2112810c43..d9a1ead867b9 100644 --- a/include/uapi/linux/raid/md_p.h +++ b/include/uapi/linux/raid/md_p.h @@ -398,4 +398,31 @@ struct r5l_meta_block { #define R5LOG_VERSION 0x1 #define R5LOG_MAGIC 0x6433c509 + +struct ppl_header_entry { + __le64 data_sector; /* raid sector of the new data */ + __le32 pp_size; /* length of partial parity */ + __le32 data_size; /* length of data */ + __le32 parity_disk; /* member disk containing parity */ + __le32 checksum; /* checksum of partial parity data for this + * entry (~crc32c) */ +} __attribute__ ((__packed__)); + +#define PPL_HEADER_SIZE 4096 +#define PPL_HDR_RESERVED 512 +#define PPL_HDR_ENTRY_SPACE \ + (PPL_HEADER_SIZE - PPL_HDR_RESERVED - 4 * sizeof(u32) - sizeof(u64)) +#define PPL_HDR_MAX_ENTRIES \ + (PPL_HDR_ENTRY_SPACE / sizeof(struct ppl_header_entry)) + +struct ppl_header { + __u8 reserved[PPL_HDR_RESERVED];/* reserved space, fill with 0xff */ + __le32 signature; /* signature (family number of volume) */ + __le32 padding; /* zero pad */ + __le64 generation; /* generation number of the header */ + __le32 entries_count; /* number of entries in entry array */ + __le32 checksum; /* checksum of the header (~crc32c) */ + struct ppl_header_entry entries[PPL_HDR_MAX_ENTRIES]; +} __attribute__ ((__packed__)); + #endif |