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LU-2093 osd: maintain O/<group>/LAST_ID properly
[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_compat.c
index a0ff99e..519357d 100644 (file)
@@ -493,7 +493,7 @@ static const struct named_oid oids[] = {
        { MDT_LAST_RECV_OID,    LAST_RCVD },
        { LFSCK_BOOKMARK_OID,   "" /* "lfsck_bookmark" */ },
        { OTABLE_IT_OID,        "" /* "otable iterator" */},
-       { OFD_LAST_RECV_OID,    "" /* LAST_RCVD */ },
+       { OFD_LAST_RECV_OID,    LAST_RCVD },
        { OFD_LAST_GROUP_OID,   "LAST_GROUP" },
        { LLOG_CATALOGS_OID,    "CATALOGS" },
        { MGS_CONFIGS_OID,      "" /* MOUNT_CONFIGS_DIR */ },
@@ -531,6 +531,8 @@ int osd_compat_spec_insert(struct osd_thread_info *info,
                 seq = fid_oid(fid) - OFD_GROUP0_LAST_OID;
                 LASSERT(seq < MAX_OBJID_GROUP);
                 LASSERT(map->groups[seq].groot);
+               rc = osd_compat_add_entry(info, osd, map->groups[seq].groot,
+                                         "LAST_ID", id, th);
         } else {
                 name = oid2name(fid_oid(fid));
                 if (name == NULL)
@@ -547,17 +549,32 @@ int osd_compat_spec_lookup(struct osd_thread_info *info,
                           struct osd_device *osd, const struct lu_fid *fid,
                           struct osd_inode_id *id)
 {
+       struct dentry   *root;
        struct dentry *dentry;
        struct inode  *inode;
        char          *name;
        int            rc = -ENOENT;
        ENTRY;
 
-       name = oid2name(fid_oid(fid));
-       if (name == NULL || strlen(name) == 0)
-               RETURN(-ENOENT);
+       if (fid_oid(fid) >= OFD_GROUP0_LAST_OID &&
+           fid_oid(fid) < OFD_GROUP4K_LAST_OID) {
+               struct osd_compat_objid *map = osd->od_ost_map;
+               int                      seq;
+
+               LASSERT(map);
+               seq = fid_oid(fid) - OFD_GROUP0_LAST_OID;
+               LASSERT(seq < MAX_OBJID_GROUP);
+               LASSERT(map->groups[seq].groot);
+               root = map->groups[seq].groot;
+               name = "LAST_ID";
+       } else {
+               root = osd_sb(osd)->s_root;
+               name = oid2name(fid_oid(fid));
+               if (name == NULL || strlen(name) == 0)
+                       RETURN(-ENOENT);
+       }
 
-       dentry = ll_lookup_one_len(name, osd_sb(osd)->s_root, strlen(name));
+       dentry = ll_lookup_one_len(name, root, strlen(name));
        if (!IS_ERR(dentry)) {
                inode = dentry->d_inode;
                if (inode) {
@@ -569,6 +586,9 @@ int osd_compat_spec_lookup(struct osd_thread_info *info,
                                rc = 0;
                        }
                }
+               /* if dentry is accessible after osd_compat_spec_insert it
+                * will still contain NULL inode, so don't keep it in cache */
+               d_invalidate(dentry);
                dput(dentry);
        }