1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
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19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
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37 #ifndef _UPCALL_CACHE_H
38 #define _UPCALL_CACHE_H
40 #define UC_CACHE_NEW 0x01
41 #define UC_CACHE_ACQUIRING 0x02
42 #define UC_CACHE_INVALID 0x04
43 #define UC_CACHE_EXPIRED 0x08
45 #define UC_CACHE_IS_NEW(i) ((i)->ue_flags & UC_CACHE_NEW)
46 #define UC_CACHE_IS_INVALID(i) ((i)->ue_flags & UC_CACHE_INVALID)
47 #define UC_CACHE_IS_ACQUIRING(i) ((i)->ue_flags & UC_CACHE_ACQUIRING)
48 #define UC_CACHE_IS_EXPIRED(i) ((i)->ue_flags & UC_CACHE_EXPIRED)
49 #define UC_CACHE_IS_VALID(i) ((i)->ue_flags == 0)
51 #define UC_CACHE_SET_NEW(i) (i)->ue_flags |= UC_CACHE_NEW
52 #define UC_CACHE_SET_INVALID(i) (i)->ue_flags |= UC_CACHE_INVALID
53 #define UC_CACHE_SET_ACQUIRING(i) (i)->ue_flags |= UC_CACHE_ACQUIRING
54 #define UC_CACHE_SET_EXPIRED(i) (i)->ue_flags |= UC_CACHE_EXPIRED
55 #define UC_CACHE_SET_VALID(i) (i)->ue_flags = 0
57 #define UC_CACHE_CLEAR_NEW(i) (i)->ue_flags &= ~UC_CACHE_NEW
58 #define UC_CACHE_CLEAR_ACQUIRING(i) (i)->ue_flags &= ~UC_CACHE_ACQUIRING
59 #define UC_CACHE_CLEAR_INVALID(i) (i)->ue_flags &= ~UC_CACHE_INVALID
60 #define UC_CACHE_CLEAR_EXPIRED(i) (i)->ue_flags &= ~UC_CACHE_EXPIRED
62 struct upcall_cache_entry {
63 struct list_head ue_hash;
66 struct group_info *ue_group_info;
70 cfs_time_t ue_acquire_expire;
74 #define UC_CACHE_HASH_SIZE (128)
75 #define UC_CACHE_HASH_INDEX(id) ((id) & (UC_CACHE_HASH_SIZE - 1))
76 #define UC_CACHE_UPCALL_MAXPATH (1024UL)
79 struct list_head uc_hashtable[UC_CACHE_HASH_SIZE];
82 char uc_name[40]; /* for upcall */
83 char uc_upcall[UC_CACHE_UPCALL_MAXPATH];
84 cfs_time_t uc_acquire_expire; /* jiffies */
85 cfs_time_t uc_entry_expire; /* jiffies */
88 struct upcall_cache_entry *upcall_cache_get_entry(struct upcall_cache *hash,
89 __u64 key, __u32 primary,
90 __u32 ngroups, __u32 *groups);
91 void upcall_cache_put_entry(struct upcall_cache *hash,
92 struct upcall_cache_entry *entry);
93 int upcall_cache_downcall(struct upcall_cache *hash, __u32 err, __u64 key,
94 __u32 primary, __u32 ngroups, __u32 *groups);
95 void upcall_cache_flush_idle(struct upcall_cache *cache);
96 void upcall_cache_flush_all(struct upcall_cache *cache);
97 struct upcall_cache *upcall_cache_init(const char *name);
98 void upcall_cache_cleanup(struct upcall_cache *hash);
100 #endif /* _UPCALL_CACHE_H */