LU-12624 lod: alloc dir stripes by QoS

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

diff --git a/lustre/include/lustre_lmv.h b/lustre/include/lustre_lmv.h
index bc71c04..d32b4ac 100644 (file)
--- a/lustre/include/lustre_lmv.h
+++ b/lustre/include/lustre_lmv.h
@@ -20,7 +20,7 @@
  * GPL HEADER END
  */
 /*
- * Copyright (c) 2014, 2015, Intel Corporation.
+ * Copyright (c) 2014, 2016, Intel Corporation.
  */
 /*
  * lustre/include/lustre_lmv.h
@@ -32,7 +32,7 @@
 
 #ifndef _LUSTRE_LMV_H
 #define _LUSTRE_LMV_H
-#include <lustre/lustre_idl.h>
+#include <uapi/linux/lustre/lustre_idl.h>
 
 struct lmv_oinfo {
        struct lu_fid   lmo_fid;
@@ -46,12 +46,42 @@ struct lmv_stripe_md {
        __u32   lsm_md_master_mdt_index;
        __u32   lsm_md_hash_type;
        __u32   lsm_md_layout_version;
+       __u32   lsm_md_migrate_offset;
+       __u32   lsm_md_migrate_hash;
        __u32   lsm_md_default_count;
        __u32   lsm_md_default_index;
        char    lsm_md_pool_name[LOV_MAXPOOLNAME + 1];
        struct lmv_oinfo lsm_md_oinfo[0];
 };
 
+static inline bool lmv_dir_striped(const struct lmv_stripe_md *lsm)
+{
+       return lsm && lsm->lsm_md_magic == LMV_MAGIC;
+}
+
+static inline bool lmv_dir_foreign(const struct lmv_stripe_md *lsm)
+{
+       return lsm && lsm->lsm_md_magic == LMV_MAGIC_FOREIGN;
+}
+
+static inline bool lmv_dir_migrating(const struct lmv_stripe_md *lsm)
+{
+       return lmv_dir_striped(lsm) &&
+              lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION;
+}
+
+static inline bool lmv_dir_bad_hash(const struct lmv_stripe_md *lsm)
+{
+       if (!lmv_dir_striped(lsm))
+               return false;
+
+       if (lmv_dir_migrating(lsm) &&
+           lsm->lsm_md_stripe_count - lsm->lsm_md_migrate_offset <= 1)
+               return false;
+
+       return !lmv_is_known_hash_type(lsm->lsm_md_hash_type);
+}
+
 static inline bool
 lsm_md_eq(const struct lmv_stripe_md *lsm1, const struct lmv_stripe_md *lsm2)
 {
@@ -64,26 +94,48 @@ lsm_md_eq(const struct lmv_stripe_md *lsm1, const struct lmv_stripe_md *lsm2)
            lsm1->lsm_md_hash_type != lsm2->lsm_md_hash_type ||
            lsm1->lsm_md_layout_version !=
                                lsm2->lsm_md_layout_version ||
+           lsm1->lsm_md_migrate_offset !=
+                               lsm2->lsm_md_migrate_offset ||
+           lsm1->lsm_md_migrate_hash !=
+                               lsm2->lsm_md_migrate_hash ||
            strcmp(lsm1->lsm_md_pool_name,
                      lsm2->lsm_md_pool_name) != 0)
                return false;
 
-       for (idx = 0; idx < lsm1->lsm_md_stripe_count; idx++) {
-               if (!lu_fid_eq(&lsm1->lsm_md_oinfo[idx].lmo_fid,
-                              &lsm2->lsm_md_oinfo[idx].lmo_fid))
-                       return false;
+       if (lmv_dir_striped(lsm1)) {
+               for (idx = 0; idx < lsm1->lsm_md_stripe_count; idx++) {
+                       if (!lu_fid_eq(&lsm1->lsm_md_oinfo[idx].lmo_fid,
+                                      &lsm2->lsm_md_oinfo[idx].lmo_fid))
+                               return false;
+               }
        }
 
        return true;
 }
+
+static inline void lsm_md_dump(int mask, const struct lmv_stripe_md *lsm)
+{
+       int i;
+
+       CDEBUG(mask, "magic %#x stripe count %d master mdt %d hash type %#x "
+               "version %d migrate offset %d migrate hash %#x pool %s\n",
+               lsm->lsm_md_magic, lsm->lsm_md_stripe_count,
+               lsm->lsm_md_master_mdt_index, lsm->lsm_md_hash_type,
+               lsm->lsm_md_layout_version, lsm->lsm_md_migrate_offset,
+               lsm->lsm_md_migrate_hash, lsm->lsm_md_pool_name);
+
+       if (!lmv_dir_striped(lsm))
+               return;
+
+       for (i = 0; i < lsm->lsm_md_stripe_count; i++)
+               CDEBUG(mask, "stripe[%d] "DFID"\n",
+                      i, PFID(&lsm->lsm_md_oinfo[i].lmo_fid));
+}
+
 union lmv_mds_md;
 
 void lmv_free_memmd(struct lmv_stripe_md *lsm);
 
-int lmvea_load_shards(const struct lu_env *env, struct dt_object *obj,
-                     struct lu_dirent *ent, struct lu_buf *buf,
-                     bool resize);
-
 static inline void lmv1_le_to_cpu(struct lmv_mds_md_v1 *lmv_dst,
                                  const struct lmv_mds_md_v1 *lmv_src)
 {
@@ -130,31 +182,25 @@ lmv_hash_all_chars(unsigned int count, const char *name, int namelen)
 static inline unsigned int
 lmv_hash_fnv1a(unsigned int count, const char *name, int namelen)
 {
-       __u64   hash;
+       __u64 hash;
 
        hash = lustre_hash_fnv_1a_64(name, namelen);
 
-       hash = hash % count;
-
-       return hash;
+       return do_div(hash, count);
 }
 
 static inline int lmv_name_to_stripe_index(__u32 lmv_hash_type,
                                           unsigned int stripe_count,
                                           const char *name, int namelen)
 {
-       int     idx;
-       __u32   hash_type = lmv_hash_type & LMV_HASH_TYPE_MASK;
+       int idx;
 
        LASSERT(namelen > 0);
-       if (stripe_count <= 1)
-               return 0;
 
-       /* for migrating object, always start from 0 stripe */
-       if (lmv_hash_type & LMV_HASH_FLAG_MIGRATION)
+       if (stripe_count <= 1)
                return 0;
 
-       switch (hash_type) {
+       switch (lmv_hash_type & LMV_HASH_TYPE_MASK) {
        case LMV_HASH_TYPE_ALL_CHARS:
                idx = lmv_hash_all_chars(stripe_count, name, namelen);
                break;
@@ -166,16 +212,17 @@ static inline int lmv_name_to_stripe_index(__u32 lmv_hash_type,
                break;
        }
 
-       CDEBUG(D_INFO, "name %.*s hash_type %d idx %d\n", namelen, name,
-              hash_type, idx);
+       CDEBUG(D_INFO, "name %.*s hash_type %#x idx %d/%u\n", namelen, name,
+              lmv_hash_type, idx, stripe_count);
 
        return idx;
 }
 
-static inline bool lmv_is_known_hash_type(__u32 type)
+static inline bool lmv_magic_supported(__u32 lum_magic)
 {
-       return (type & LMV_HASH_TYPE_MASK) == LMV_HASH_TYPE_FNV_1A_64 ||
-              (type & LMV_HASH_TYPE_MASK) == LMV_HASH_TYPE_ALL_CHARS;
+       return lum_magic == LMV_USER_MAGIC ||
+              lum_magic == LMV_USER_MAGIC_SPECIFIC ||
+              lum_magic == LMV_MAGIC_FOREIGN;
 }
 
 #endif