lustre/include/lustre_ucache.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  */
   4
   5 #ifndef _UPCALL_CACHE_H
   6 #define _UPCALL_CACHE_H
   7
   8 #define UC_CACHE_NEW            0x01
   9 #define UC_CACHE_ACQUIRING      0x02
  10 #define UC_CACHE_INVALID        0x04
  11 #define UC_CACHE_EXPIRED        0x08
  12
  13 #define UC_CACHE_IS_NEW(i)          ((i)->ue_flags & UC_CACHE_NEW)
  14 #define UC_CACHE_IS_INVALID(i)      ((i)->ue_flags & UC_CACHE_INVALID)
  15 #define UC_CACHE_IS_ACQUIRING(i)    ((i)->ue_flags & UC_CACHE_ACQUIRING)
  16 #define UC_CACHE_IS_EXPIRED(i)      ((i)->ue_flags & UC_CACHE_EXPIRED)
  17 #define UC_CACHE_IS_VALID(i)        ((i)->ue_flags == 0)
  18
  19 #define UC_CACHE_SET_NEW(i)         (i)->ue_flags |= UC_CACHE_NEW
  20 #define UC_CACHE_SET_INVALID(i)     (i)->ue_flags |= UC_CACHE_INVALID
  21 #define UC_CACHE_SET_ACQUIRING(i)   (i)->ue_flags |= UC_CACHE_ACQUIRING
  22 #define UC_CACHE_SET_EXPIRED(i)     (i)->ue_flags |= UC_CACHE_EXPIRED
  23 #define UC_CACHE_SET_VALID(i)       (i)->ue_flags = 0
  24
  25 #define UC_CACHE_CLEAR_NEW(i)       (i)->ue_flags &= ~UC_CACHE_NEW
  26 #define UC_CACHE_CLEAR_ACQUIRING(i) (i)->ue_flags &= ~UC_CACHE_ACQUIRING
  27 #define UC_CACHE_CLEAR_INVALID(i)   (i)->ue_flags &= ~UC_CACHE_INVALID
  28 #define UC_CACHE_CLEAR_EXPIRED(i)   (i)->ue_flags &= ~UC_CACHE_EXPIRED
  29
  30 struct upcall_cache_entry;
  31
  32 struct mdt_setxid_perm {
  33         lnet_nid_t      mp_nid;
  34         __u32           mp_perm;
  35 };
  36
  37 struct mdt_identity {
  38         struct upcall_cache_entry *mi_uc_entry;
  39         uid_t                      mi_uid;
  40         gid_t                      mi_gid;
  41         struct group_info         *mi_ginfo;
  42         int                        mi_nperms;
  43         struct mdt_setxid_perm    *mi_perms;
  44 };
  45
  46 struct rmtacl_upcall_data {
  47         uid_t                      aud_uid;
  48         gid_t                      aud_gid;
  49         char                      *aud_cmd;
  50 };
  51
  52 struct mdt_rmtacl {
  53         uid_t                      ra_uid;
  54         gid_t                      ra_gid;
  55         __u32                      ra_handle;
  56         char                      *ra_cmd;
  57         char                      *ra_buf;
  58 };
  59
  60 struct upcall_cache_entry {
  61         struct list_head        ue_hash;
  62         __u64                   ue_key;
  63 //        __u64                   ue_primary;
  64 //        struct group_info      *ue_group_info;
  65         atomic_t                ue_refcount;
  66         int                     ue_flags;
  67         cfs_waitq_t             ue_waitq;
  68         cfs_time_t              ue_acquire_expire;
  69         cfs_time_t              ue_expire;
  70         union {
  71                 struct mdt_identity     identity;
  72                 struct mdt_rmtacl       acl;
  73         } u;
  74 };
  75
  76 #define UC_CACHE_HASH_SIZE        (128)
  77 #define UC_CACHE_HASH_INDEX(id)   ((id) & (UC_CACHE_HASH_SIZE - 1))
  78 #define UC_CACHE_UPCALL_MAXPATH   (1024UL)
  79
  80 struct upcall_cache;
  81
  82 struct upcall_cache_ops {
  83         void            (*init_entry)(struct upcall_cache_entry *, void *args);
  84         void            (*free_entry)(struct upcall_cache *,
  85                                       struct upcall_cache_entry *);
  86         int             (*upcall_compare)(struct upcall_cache *,
  87                                           struct upcall_cache_entry *,
  88                                           __u64 key, void *args);
  89         int             (*downcall_compare)(struct upcall_cache *,
  90                                             struct upcall_cache_entry *,
  91                                             __u64 key, void *args);
  92         int             (*do_upcall)(struct upcall_cache *,
  93                                      struct upcall_cache_entry *);
  94         int             (*parse_downcall)(struct upcall_cache *,
  95                                           struct upcall_cache_entry *, void *);
  96 };
  97
  98 struct upcall_cache {
  99         struct list_head        uc_hashtable[UC_CACHE_HASH_SIZE];
 100         spinlock_t              uc_lock;
 101
 102         char                    uc_name[40];            /* for upcall */
 103         char                    uc_upcall[UC_CACHE_UPCALL_MAXPATH];
 104         cfs_time_t              uc_acquire_expire;      /* jiffies */
 105         cfs_time_t              uc_entry_expire;        /* jiffies */
 106         struct upcall_cache_ops *uc_ops;
 107 };
 108
 109 struct upcall_cache_entry *upcall_cache_get_entry(struct upcall_cache *cache,
 110                                                   __u64 key, void *args);
 111 void upcall_cache_put_entry(struct upcall_cache *cache,
 112                             struct upcall_cache_entry *entry);
 113 int upcall_cache_downcall(struct upcall_cache *cache, __u32 err, __u64 key,
 114                           void *args);
 115 void upcall_cache_flush_idle(struct upcall_cache *cache);
 116 void upcall_cache_flush_all(struct upcall_cache *cache);
 117 void upcall_cache_flush_one(struct upcall_cache *cache, __u64 key, void *args);
 118 struct upcall_cache *upcall_cache_init(const char *name, const char *upcall,
 119                                        struct upcall_cache_ops *ops);
 120 void upcall_cache_cleanup(struct upcall_cache *cache);
 121
 122 #if 0
 123 struct upcall_cache_entry *upcall_cache_get_entry(struct upcall_cache *hash,
 124                                                   __u64 key, __u32 primary,
 125                                                   __u32 ngroups, __u32 *groups);
 126 void upcall_cache_put_entry(struct upcall_cache *hash,
 127                             struct upcall_cache_entry *entry);
 128 int upcall_cache_downcall(struct upcall_cache *hash, __u32 err, __u64 key,
 129                           __u32 primary, __u32 ngroups, __u32 *groups);
 130 void upcall_cache_flush_idle(struct upcall_cache *cache);
 131 void upcall_cache_flush_all(struct upcall_cache *cache);
 132 struct upcall_cache *upcall_cache_init(const char *name);
 133 void upcall_cache_cleanup(struct upcall_cache *hash);
 134
 135 #endif
 136 #endif /* _UPCALL_CACHE_H */