LU-3336 lfsck: namespace visible lost+found directory

[fs/lustre-release.git] / lustre / include / lustre / lustre_idl.h

diff --git a/lustre/include/lustre/lustre_idl.h b/lustre/include/lustre/lustre_idl.h
index 4bb3e7c..0b7ed0f 100644 (file)
--- a/lustre/include/lustre/lustre_idl.h
+++ b/lustre/include/lustre/lustre_idl.h
@@ -141,6 +141,7 @@
 #define SEQ_DATA_PORTAL                31
 #define SEQ_CONTROLLER_PORTAL          32
 #define MGS_BULK_PORTAL                33
+#define OST_IDX_PORTAL                34
 
 /* Portal 63 is reserved for the Cray Inc DVS - nic@cray.com, roe@cray.com, n8851@cray.com */
 
@@ -463,6 +464,7 @@ enum fid_seq {
        FID_SEQ_QUOTA           = 0x200000005ULL,
        FID_SEQ_QUOTA_GLB       = 0x200000006ULL,
        FID_SEQ_ROOT            = 0x200000007ULL,  /* Located on MDT0 */
+       FID_SEQ_LAYOUT_RBTREE   = 0x200000008ULL,
        FID_SEQ_NORMAL          = 0x200000400ULL,
        FID_SEQ_LOV_DEFAULT     = 0xffffffffffffffffULL
 };
@@ -482,8 +484,9 @@ enum special_oid {
 
 /** OID for FID_SEQ_DOT_LUSTRE */
 enum dot_lustre_oid {
-        FID_OID_DOT_LUSTRE  = 1UL,
-        FID_OID_DOT_LUSTRE_OBF = 2UL,
+       FID_OID_DOT_LUSTRE      = 1UL,
+       FID_OID_DOT_LUSTRE_OBF  = 2UL,
+       FID_OID_DOT_LUSTRE_LPF  = 3UL,
 };
 
 static inline int fid_seq_is_mdt0(obd_seq seq)
@@ -605,6 +608,11 @@ static inline int fid_is_norm(const struct lu_fid *fid)
         return fid_seq_is_norm(fid_seq(fid));
 }
 
+static inline int fid_is_layout_rbtree(const struct lu_fid *fid)
+{
+       return fid_seq(fid) == FID_SEQ_LAYOUT_RBTREE;
+}
+
 /* convert an OST objid into an IDIF FID SEQ number */
 static inline obd_seq fid_idif_seq(obd_id id, __u32 ost_idx)
 {
@@ -952,6 +960,20 @@ static inline void ostid_le_to_cpu(const struct ost_id *src_oi,
        }
 }
 
+struct lu_orphan_rec {
+       /* The MDT-object's FID referenced by the orphan OST-object */
+       struct lu_fid   lor_fid;
+       __u32           lor_uid;
+       __u32           lor_gid;
+};
+
+struct lu_orphan_ent {
+       /* The orphan OST-object's FID */
+       struct lu_fid           loe_key;
+       struct lu_orphan_rec    loe_rec;
+};
+void lustre_swab_orphan_ent(struct lu_orphan_ent *ent);
+
 /** @} lu_fid */
 
 /** \defgroup lu_dir lu_dir
@@ -1688,6 +1710,7 @@ static inline void lmm_oi_cpu_to_le(struct ost_id *dst_oi,
 #define XATTR_NAME_LOV          "trusted.lov"
 #define XATTR_NAME_LMA          "trusted.lma"
 #define XATTR_NAME_LMV          "trusted.lmv"
+#define XATTR_NAME_DEFAULT_LMV "trusted.dmv"
 #define XATTR_NAME_LINK         "trusted.link"
 #define XATTR_NAME_FID          "trusted.fid"
 #define XATTR_NAME_VERSION      "trusted.version"
@@ -1779,6 +1802,8 @@ static inline __u32 lov_mds_md_size(__u16 stripes, __u32 lmm_magic)
 #define OBD_MD_FLDATAVERSION (0x0010000000000000ULL) /* iversion sum */
 #define OBD_MD_FLRELEASED    (0x0020000000000000ULL) /* file released */
 
+#define OBD_MD_DEFAULT_MEA   (0x0040000000000000ULL) /* default MEA */
+
 #define OBD_MD_FLGETATTR (OBD_MD_FLID    | OBD_MD_FLATIME | OBD_MD_FLMTIME | \
                           OBD_MD_FLCTIME | OBD_MD_FLSIZE  | OBD_MD_FLBLKSZ | \
                           OBD_MD_FLMODE  | OBD_MD_FLTYPE  | OBD_MD_FLUID   | \
@@ -2663,7 +2688,7 @@ struct lmv_desc {
         __u32 ld_tgt_count;                /* how many MDS's */
         __u32 ld_active_tgt_count;         /* how many active */
         __u32 ld_default_stripe_count;     /* how many objects are used */
-        __u32 ld_pattern;                  /* default MEA_MAGIC_* */
+       __u32 ld_pattern;                  /* default hash pattern */
         __u64 ld_default_hash_size;
         __u64 ld_padding_1;                /* also fix lustre_swab_lmv_desc */
         __u32 ld_padding_2;                /* also fix lustre_swab_lmv_desc */
@@ -2679,6 +2704,43 @@ extern void lustre_swab_lmv_desc (struct lmv_desc *ld);
 #define LMV_MAGIC_V1   0x0CD10CD0    /* normal stripe lmv magic */
 #define LMV_USER_MAGIC 0x0CD20CD0    /* default lmv magic*/
 #define LMV_MAGIC      LMV_MAGIC_V1
+
+enum lmv_hash_type {
+       LMV_HASH_TYPE_ALL_CHARS = 1,
+       LMV_HASH_TYPE_FNV_1A_64 = 2,
+};
+
+#define LMV_HASH_NAME_ALL_CHARS        "all_char"
+#define LMV_HASH_NAME_FNV_1A_64        "fnv_1a_64"
+
+/**
+ * The FNV-1a hash algorithm is as follows:
+ *     hash = FNV_offset_basis
+ *     for each octet_of_data to be hashed
+ *             hash = hash XOR octet_of_data
+ *             hash = hash × FNV_prime
+ *     return hash
+ * http://en.wikipedia.org/wiki/Fowler–Noll–Vo_hash_function#FNV-1a_hash
+ *
+ * http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-reference-source
+ * FNV_prime is 2^40 + 2^8 + 0xb3 = 0x100000001b3ULL
+ **/
+#define LUSTRE_FNV_1A_64_PRIME 0x100000001b3ULL
+#define LUSTRE_FNV_1A_64_OFFSET_BIAS 0xcbf29ce484222325ULL
+static inline __u64 lustre_hash_fnv_1a_64(const void *buf, size_t size)
+{
+       __u64 hash = LUSTRE_FNV_1A_64_OFFSET_BIAS;
+       const unsigned char *p = buf;
+       size_t i;
+
+       for (i = 0; i < size; i++) {
+               hash ^= p[i];
+               hash *= LUSTRE_FNV_1A_64_PRIME;
+       }
+
+       return hash;
+}
+
 struct lmv_mds_md_v1 {
        __u32 lmv_magic;
        __u32 lmv_stripe_count;         /* stripe count */
@@ -2697,6 +2759,8 @@ union lmv_mds_md {
        struct lmv_user_md       lmv_user_md;
 };
 
+extern void lustre_swab_lmv_mds_md(union lmv_mds_md *lmm);
+
 static inline int lmv_mds_md_size(int stripe_count, unsigned int lmm_magic)
 {
        switch (lmm_magic) {