[LU-3539] Change update RPC format

• Type: Technical task
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.6.0
• Assignee: Li Wei (Inactive)
• Reporter: Di Wang

Description

In DNE phase II, the update RPC format will be changed, please refer to HLD of DNE phase II.

enum update_rec_flags {
OUT_UPDATE_FLAG_TYPE = 0x000000001, /* 0 = MDT, 1 = OST */
OUT_UPDATE_FLAG_SYNC = 0x000000002, /* commit update before reply */
OUT_UPDATE_FLAG_COMMITTED = 0x000000004, /* ur_batchid is committed globally */
OUT_UPDATE_FLAG_NOLOG = 0x000000008, /* idempotent update does not need to be logged */
};

struct update_rec_v2 {
_u16 ur_update_type; /* OUT* update type */
__u16 ur_master_index; /* master MDT/OST index */
__u32 ur_flags; /* master target type, globally committed, sync, log?, etc */
__u64 ur_batchid; /* transno of master MDT in operation */
struct lu_fid ur_fid; /* FID operation applies to */
__u32 ur_lens[UPDATE_BUF_COUNT]; /* length of each update buffer, rounded up to 8 bytes */
char ur_bufs[0]; /* per operation data values, multiple of 8 bytes */
};

struct update_header {
__u32 uh_magic; /* UPDATE_BUFFER_MAGIC_V2 */
__u32 uh_count; /* number of update records in request */
__u32 uh_bufs[uh_count]; /* length of each struct update_rec_v2 */
};

Issue Links

• is related to: LU-4215 Some expected improvements for OUT