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38 #include <libcfs/libcfs.h>
40 /** \defgroup ucache ucache
45 #define UC_CACHE_NEW 0x01
46 #define UC_CACHE_ACQUIRING 0x02
47 #define UC_CACHE_INVALID 0x04
48 #define UC_CACHE_EXPIRED 0x08
50 #define UC_CACHE_IS_NEW(i) ((i)->ue_flags & UC_CACHE_NEW)
51 #define UC_CACHE_IS_INVALID(i) ((i)->ue_flags & UC_CACHE_INVALID)
52 #define UC_CACHE_IS_ACQUIRING(i) ((i)->ue_flags & UC_CACHE_ACQUIRING)
53 #define UC_CACHE_IS_EXPIRED(i) ((i)->ue_flags & UC_CACHE_EXPIRED)
54 #define UC_CACHE_IS_VALID(i) ((i)->ue_flags == 0)
56 #define UC_CACHE_SET_NEW(i) (i)->ue_flags |= UC_CACHE_NEW
57 #define UC_CACHE_SET_INVALID(i) (i)->ue_flags |= UC_CACHE_INVALID
58 #define UC_CACHE_SET_ACQUIRING(i) (i)->ue_flags |= UC_CACHE_ACQUIRING
59 #define UC_CACHE_SET_EXPIRED(i) (i)->ue_flags |= UC_CACHE_EXPIRED
60 #define UC_CACHE_SET_VALID(i) (i)->ue_flags = 0
62 #define UC_CACHE_CLEAR_NEW(i) (i)->ue_flags &= ~UC_CACHE_NEW
63 #define UC_CACHE_CLEAR_ACQUIRING(i) (i)->ue_flags &= ~UC_CACHE_ACQUIRING
64 #define UC_CACHE_CLEAR_INVALID(i) (i)->ue_flags &= ~UC_CACHE_INVALID
65 #define UC_CACHE_CLEAR_EXPIRED(i) (i)->ue_flags &= ~UC_CACHE_EXPIRED
67 struct upcall_cache_entry;
75 struct upcall_cache_entry *mi_uc_entry;
78 cfs_group_info_t *mi_ginfo;
80 struct md_perm *mi_perms;
83 struct upcall_cache_entry {
86 cfs_atomic_t ue_refcount;
89 cfs_time_t ue_acquire_expire;
92 struct md_identity identity;
96 #define UC_CACHE_HASH_SIZE (128)
97 #define UC_CACHE_HASH_INDEX(id) ((id) & (UC_CACHE_HASH_SIZE - 1))
98 #define UC_CACHE_UPCALL_MAXPATH (1024UL)
102 struct upcall_cache_ops {
103 void (*init_entry)(struct upcall_cache_entry *, void *args);
104 void (*free_entry)(struct upcall_cache *,
105 struct upcall_cache_entry *);
106 int (*upcall_compare)(struct upcall_cache *,
107 struct upcall_cache_entry *,
108 __u64 key, void *args);
109 int (*downcall_compare)(struct upcall_cache *,
110 struct upcall_cache_entry *,
111 __u64 key, void *args);
112 int (*do_upcall)(struct upcall_cache *,
113 struct upcall_cache_entry *);
114 int (*parse_downcall)(struct upcall_cache *,
115 struct upcall_cache_entry *, void *);
118 struct upcall_cache {
119 cfs_list_t uc_hashtable[UC_CACHE_HASH_SIZE];
121 rwlock_t uc_upcall_rwlock;
123 char uc_name[40]; /* for upcall */
124 char uc_upcall[UC_CACHE_UPCALL_MAXPATH];
125 int uc_acquire_expire; /* seconds */
126 int uc_entry_expire; /* seconds */
127 struct upcall_cache_ops *uc_ops;
130 struct upcall_cache_entry *upcall_cache_get_entry(struct upcall_cache *cache,
131 __u64 key, void *args);
132 void upcall_cache_put_entry(struct upcall_cache *cache,
133 struct upcall_cache_entry *entry);
134 int upcall_cache_downcall(struct upcall_cache *cache, __u32 err, __u64 key,
136 void upcall_cache_flush_idle(struct upcall_cache *cache);
137 void upcall_cache_flush_all(struct upcall_cache *cache);
138 void upcall_cache_flush_one(struct upcall_cache *cache, __u64 key, void *args);
139 struct upcall_cache *upcall_cache_init(const char *name, const char *upcall,
140 struct upcall_cache_ops *ops);
141 void upcall_cache_cleanup(struct upcall_cache *cache);
144 struct upcall_cache_entry *upcall_cache_get_entry(struct upcall_cache *hash,
145 __u64 key, __u32 primary,
146 __u32 ngroups, __u32 *groups);
147 void upcall_cache_put_entry(struct upcall_cache *hash,
148 struct upcall_cache_entry *entry);
149 int upcall_cache_downcall(struct upcall_cache *hash, __u32 err, __u64 key,
150 __u32 primary, __u32 ngroups, __u32 *groups);
151 void upcall_cache_flush_idle(struct upcall_cache *cache);
152 void upcall_cache_flush_all(struct upcall_cache *cache);
153 struct upcall_cache *upcall_cache_init(const char *name);
154 void upcall_cache_cleanup(struct upcall_cache *hash);
160 #endif /* _LUCACHE_H */