Branch HEAD

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

diff --git a/lustre/include/lustre_ucache.h b/lustre/include/lustre_ucache.h
index 16b5c1a..1eca99d 100644 (file)
--- a/lustre/include/lustre_ucache.h
+++ b/lustre/include/lustre_ucache.h
@@ -1,5 +1,37 @@
 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
  * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
  */
 
 #ifndef _UPCALL_CACHE_H
@@ -27,32 +59,83 @@
 #define UC_CACHE_CLEAR_INVALID(i)   (i)->ue_flags &= ~UC_CACHE_INVALID
 #define UC_CACHE_CLEAR_EXPIRED(i)   (i)->ue_flags &= ~UC_CACHE_EXPIRED
 
+struct upcall_cache_entry;
+
+struct md_perm {
+        lnet_nid_t      mp_nid;
+        __u32           mp_perm;
+};
+
+struct md_identity {
+        struct upcall_cache_entry *mi_uc_entry;
+        uid_t                      mi_uid;
+        gid_t                      mi_gid;
+        struct group_info         *mi_ginfo;
+        int                        mi_nperms;
+        struct md_perm            *mi_perms;
+};
+
 struct upcall_cache_entry {
         struct list_head        ue_hash;
         __u64                   ue_key;
-        __u64                   ue_primary;
-        struct group_info      *ue_group_info;
         atomic_t                ue_refcount;
         int                     ue_flags;
         cfs_waitq_t             ue_waitq;
         cfs_time_t              ue_acquire_expire;
         cfs_time_t              ue_expire;
+        union {
+                struct md_identity     identity;
+        } u;
 };
 
 #define UC_CACHE_HASH_SIZE        (128)
 #define UC_CACHE_HASH_INDEX(id)   ((id) & (UC_CACHE_HASH_SIZE - 1))
 #define UC_CACHE_UPCALL_MAXPATH   (1024UL)
 
+struct upcall_cache;
+
+struct upcall_cache_ops {
+        void            (*init_entry)(struct upcall_cache_entry *, void *args);
+        void            (*free_entry)(struct upcall_cache *,
+                                      struct upcall_cache_entry *);
+        int             (*upcall_compare)(struct upcall_cache *,
+                                          struct upcall_cache_entry *,
+                                          __u64 key, void *args);
+        int             (*downcall_compare)(struct upcall_cache *,
+                                            struct upcall_cache_entry *,
+                                            __u64 key, void *args);
+        int             (*do_upcall)(struct upcall_cache *,
+                                     struct upcall_cache_entry *);
+        int             (*parse_downcall)(struct upcall_cache *,
+                                          struct upcall_cache_entry *, void *);
+};
+
 struct upcall_cache {
         struct list_head        uc_hashtable[UC_CACHE_HASH_SIZE];
         spinlock_t              uc_lock;
+        rwlock_t                uc_upcall_rwlock;
 
         char                    uc_name[40];            /* for upcall */
         char                    uc_upcall[UC_CACHE_UPCALL_MAXPATH];
         cfs_time_t              uc_acquire_expire;      /* jiffies */
         cfs_time_t              uc_entry_expire;        /* jiffies */
+        struct upcall_cache_ops *uc_ops;
 };
 
+struct upcall_cache_entry *upcall_cache_get_entry(struct upcall_cache *cache,
+                                                  __u64 key, void *args);
+void upcall_cache_put_entry(struct upcall_cache *cache,
+                            struct upcall_cache_entry *entry);
+int upcall_cache_downcall(struct upcall_cache *cache, __u32 err, __u64 key,
+                          void *args);
+void upcall_cache_flush_idle(struct upcall_cache *cache);
+void upcall_cache_flush_all(struct upcall_cache *cache);
+void upcall_cache_flush_one(struct upcall_cache *cache, __u64 key, void *args);
+struct upcall_cache *upcall_cache_init(const char *name, const char *upcall,
+                                       struct upcall_cache_ops *ops);
+void upcall_cache_cleanup(struct upcall_cache *cache);
+
+#if 0
 struct upcall_cache_entry *upcall_cache_get_entry(struct upcall_cache *hash,
                                                   __u64 key, __u32 primary,
                                                   __u32 ngroups, __u32 *groups);
@@ -65,4 +148,5 @@ void upcall_cache_flush_all(struct upcall_cache *cache);
 struct upcall_cache *upcall_cache_init(const char *name);
 void upcall_cache_cleanup(struct upcall_cache *hash);
 
+#endif
 #endif /* _UPCALL_CACHE_H */