+struct obd_connect_data {
+ __u64 ocd_connect_flags; /* OBD_CONNECT_* per above */
+ __u32 ocd_version; /* lustre release version number */
+ __u32 ocd_grant; /* initial cache grant amount (bytes) */
+ __u32 ocd_index; /* LOV index to connect to */
+ __u32 ocd_brw_size; /* Maximum BRW size in bytes */
+ __u64 ocd_ibits_known; /* inode bits this client understands */
+ __u8 ocd_blocksize; /* log2 of the backend filesystem blocksize */
+ __u8 ocd_inodespace; /* log2 of the per-inode space consumption */
+ __u16 ocd_grant_extent; /* per-extent grant overhead, in 1K blocks */
+ __u32 ocd_unused; /* also fix lustre_swab_connect */
+ __u64 ocd_transno; /* first transno from client to be replayed */
+ __u32 ocd_group; /* MDS group on OST */
+ __u32 ocd_cksum_types; /* supported checksum algorithms */
+ __u32 ocd_max_easize; /* How big LOV EA can be on MDS */
+ __u32 ocd_instance; /* instance # of this target */
+ __u64 ocd_maxbytes; /* Maximum stripe size in bytes */
+ /* Fields after ocd_maxbytes are only accessible by the receiver
+ * if the corresponding flag in ocd_connect_flags is set. Accessing
+ * any field after ocd_maxbytes on the receiver without a valid flag
+ * may result in out-of-bound memory access and kernel oops. */
+ __u64 padding1; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 padding2; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 padding3; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 padding4; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 padding5; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 padding6; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 padding7; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 padding8; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 padding9; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 paddingA; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 paddingB; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 paddingC; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 paddingD; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 paddingE; /* added 2.1.0. also fix lustre_swab_connect */
+ __u64 paddingF; /* added 2.1.0. also fix lustre_swab_connect */
+};
+/* XXX README XXX:
+ * Please DO NOT use any fields here before first ensuring that this same
+ * field is not in use on some other branch. Please clear any such changes
+ * with senior engineers before starting to use a new field. Then, submit
+ * a small patch against EVERY branch that ONLY adds the new field along with
+ * the matching OBD_CONNECT flag, so that can be approved and landed easily to
+ * reserve the flag for future use. */
+
+