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39 # define EXPORT_SYMTAB
42 #include <libcfs/libcfs.h>
44 /** \defgroup ucache ucache
49 #define UC_CACHE_NEW 0x01
50 #define UC_CACHE_ACQUIRING 0x02
51 #define UC_CACHE_INVALID 0x04
52 #define UC_CACHE_EXPIRED 0x08
54 #define UC_CACHE_IS_NEW(i) ((i)->ue_flags & UC_CACHE_NEW)
55 #define UC_CACHE_IS_INVALID(i) ((i)->ue_flags & UC_CACHE_INVALID)
56 #define UC_CACHE_IS_ACQUIRING(i) ((i)->ue_flags & UC_CACHE_ACQUIRING)
57 #define UC_CACHE_IS_EXPIRED(i) ((i)->ue_flags & UC_CACHE_EXPIRED)
58 #define UC_CACHE_IS_VALID(i) ((i)->ue_flags == 0)
60 #define UC_CACHE_SET_NEW(i) (i)->ue_flags |= UC_CACHE_NEW
61 #define UC_CACHE_SET_INVALID(i) (i)->ue_flags |= UC_CACHE_INVALID
62 #define UC_CACHE_SET_ACQUIRING(i) (i)->ue_flags |= UC_CACHE_ACQUIRING
63 #define UC_CACHE_SET_EXPIRED(i) (i)->ue_flags |= UC_CACHE_EXPIRED
64 #define UC_CACHE_SET_VALID(i) (i)->ue_flags = 0
66 #define UC_CACHE_CLEAR_NEW(i) (i)->ue_flags &= ~UC_CACHE_NEW
67 #define UC_CACHE_CLEAR_ACQUIRING(i) (i)->ue_flags &= ~UC_CACHE_ACQUIRING
68 #define UC_CACHE_CLEAR_INVALID(i) (i)->ue_flags &= ~UC_CACHE_INVALID
69 #define UC_CACHE_CLEAR_EXPIRED(i) (i)->ue_flags &= ~UC_CACHE_EXPIRED
71 struct upcall_cache_entry;
79 struct upcall_cache_entry *mi_uc_entry;
82 cfs_group_info_t *mi_ginfo;
84 struct md_perm *mi_perms;
87 struct upcall_cache_entry {
90 cfs_atomic_t ue_refcount;
93 cfs_time_t ue_acquire_expire;
96 struct md_identity identity;
100 #define UC_CACHE_HASH_SIZE (128)
101 #define UC_CACHE_HASH_INDEX(id) ((id) & (UC_CACHE_HASH_SIZE - 1))
102 #define UC_CACHE_UPCALL_MAXPATH (1024UL)
106 struct upcall_cache_ops {
107 void (*init_entry)(struct upcall_cache_entry *, void *args);
108 void (*free_entry)(struct upcall_cache *,
109 struct upcall_cache_entry *);
110 int (*upcall_compare)(struct upcall_cache *,
111 struct upcall_cache_entry *,
112 __u64 key, void *args);
113 int (*downcall_compare)(struct upcall_cache *,
114 struct upcall_cache_entry *,
115 __u64 key, void *args);
116 int (*do_upcall)(struct upcall_cache *,
117 struct upcall_cache_entry *);
118 int (*parse_downcall)(struct upcall_cache *,
119 struct upcall_cache_entry *, void *);
122 struct upcall_cache {
123 cfs_list_t uc_hashtable[UC_CACHE_HASH_SIZE];
124 cfs_spinlock_t uc_lock;
125 cfs_rwlock_t uc_upcall_rwlock;
127 char uc_name[40]; /* for upcall */
128 char uc_upcall[UC_CACHE_UPCALL_MAXPATH];
129 int uc_acquire_expire; /* seconds */
130 int uc_entry_expire; /* seconds */
131 struct upcall_cache_ops *uc_ops;
134 struct upcall_cache_entry *upcall_cache_get_entry(struct upcall_cache *cache,
135 __u64 key, void *args);
136 void upcall_cache_put_entry(struct upcall_cache *cache,
137 struct upcall_cache_entry *entry);
138 int upcall_cache_downcall(struct upcall_cache *cache, __u32 err, __u64 key,
140 void upcall_cache_flush_idle(struct upcall_cache *cache);
141 void upcall_cache_flush_all(struct upcall_cache *cache);
142 void upcall_cache_flush_one(struct upcall_cache *cache, __u64 key, void *args);
143 struct upcall_cache *upcall_cache_init(const char *name, const char *upcall,
144 struct upcall_cache_ops *ops);
145 void upcall_cache_cleanup(struct upcall_cache *cache);
148 struct upcall_cache_entry *upcall_cache_get_entry(struct upcall_cache *hash,
149 __u64 key, __u32 primary,
150 __u32 ngroups, __u32 *groups);
151 void upcall_cache_put_entry(struct upcall_cache *hash,
152 struct upcall_cache_entry *entry);
153 int upcall_cache_downcall(struct upcall_cache *hash, __u32 err, __u64 key,
154 __u32 primary, __u32 ngroups, __u32 *groups);
155 void upcall_cache_flush_idle(struct upcall_cache *cache);
156 void upcall_cache_flush_all(struct upcall_cache *cache);
157 struct upcall_cache *upcall_cache_init(const char *name);
158 void upcall_cache_cleanup(struct upcall_cache *hash);
164 #endif /* _LUCACHE_H */