LU-11376 lov: new foreign LOV format

[fs/lustre-release.git] / lustre / include / uapi / linux / lustre / lustre_user.h

diff --git a/lustre/include/uapi/linux/lustre/lustre_user.h b/lustre/include/uapi/linux/lustre/lustre_user.h
index 6229b61..3329aae 100644 (file)
--- a/lustre/include/uapi/linux/lustre/lustre_user.h
+++ b/lustre/include/uapi/linux/lustre/lustre_user.h
@@ -55,6 +55,7 @@
 # include <limits.h>
 # include <stdbool.h>
 # include <stdio.h> /* snprintf() */
+# include <stdint.h>
 # include <string.h>
 # define NEED_QUOTA_DEFS
 /* # include <sys/quota.h> - this causes complaints about caddr_t */
@@ -540,6 +541,7 @@ struct fsxattr {
 /* 0x0BD40BD0 is occupied by LOV_MAGIC_MIGRATE */
 #define LOV_USER_MAGIC_SPECIFIC 0x0BD50BD0     /* for specific OSTs */
 #define LOV_USER_MAGIC_COMP_V1 0x0BD60BD0
+#define LOV_USER_MAGIC_FOREIGN 0x0BD70BD0
 
 #define LMV_USER_MAGIC         0x0CD30CD0    /* default lmv magic */
 #define LMV_USER_MAGIC_V0      0x0CD20CD0    /* old default lmv magic*/
@@ -625,6 +627,21 @@ struct lov_user_md_v3 {           /* LOV EA user data (host-endian) */
        struct lov_user_ost_data_v1 lmm_objects[0]; /* per-stripe data */
 } __attribute__((packed));
 
+struct lov_foreign_md {
+       __u32 lfm_magic;        /* magic number = LOV_MAGIC_FOREIGN */
+       __u32 lfm_length;       /* length of lfm_value */
+       __u32 lfm_type;         /* type, see LOV_FOREIGN_TYPE_ */
+       __u32 lfm_flags;        /* flags, type specific */
+       char lfm_value[];
+};
+
+#define foreign_size(lfm) (((struct lov_foreign_md *)lfm)->lfm_length + \
+                          offsetof(struct lov_foreign_md, lfm_value))
+
+#define foreign_size_le(lfm) \
+       (le32_to_cpu(((struct lov_foreign_md *)lfm)->lfm_length) + \
+       offsetof(struct lov_foreign_md, lfm_value))
+
 struct lu_extent {
        __u64   e_start;
        __u64   e_end;
@@ -782,6 +799,20 @@ enum lmv_hash_type {
 
 extern char *mdt_hash_name[LMV_HASH_TYPE_MAX];
 
+/**
+ * LOV foreign types
+ **/
+#define LOV_FOREIGN_TYPE_NONE 0
+#define LOV_FOREIGN_TYPE_DAOS 0xda05
+#define LOV_FOREIGN_TYPE_UNKNOWN UINT32_MAX
+
+struct lustre_foreign_type {
+       uint32_t lft_type;
+       const char *lft_name;
+};
+
+extern struct lustre_foreign_type lov_foreign_type[];
+
 /* Got this according to how get LOV_MAX_STRIPE_COUNT, see above,
  * (max buffer size - lmv+rpc header) / sizeof(struct lmv_user_mds_data) */
 #define LMV_MAX_STRIPE_COUNT 2000  /* ((12 * 4096 - 256) / 24) */