This source file includes following definitions.
- nfs4_slot_tbl_draining
- nfs4_test_locked_slot
- nfs4_get_session
- nfs4_has_session
- nfs4_has_persistent_session
- nfs4_copy_sessionid
- nfs4_init_session
- nfs4_has_session
- nfs4_has_persistent_session
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8 #ifndef __LINUX_FS_NFS_NFS4SESSION_H
9 #define __LINUX_FS_NFS_NFS4SESSION_H
10
11
12 #define NFS4_DEF_SLOT_TABLE_SIZE (64U)
13 #define NFS4_DEF_CB_SLOT_TABLE_SIZE (16U)
14 #define NFS4_MAX_SLOT_TABLE (1024U)
15 #define NFS4_NO_SLOT ((u32)-1)
16
17 #if IS_ENABLED(CONFIG_NFS_V4)
18
19
20 struct nfs4_slot {
21 struct nfs4_slot_table *table;
22 struct nfs4_slot *next;
23 unsigned long generation;
24 u32 slot_nr;
25 u32 seq_nr;
26 u32 seq_nr_last_acked;
27 u32 seq_nr_highest_sent;
28 unsigned int privileged : 1,
29 seq_done : 1;
30 };
31
32
33 enum nfs4_slot_tbl_state {
34 NFS4_SLOT_TBL_DRAINING,
35 };
36
37 #define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long))
38 struct nfs4_slot_table {
39 struct nfs4_session *session;
40 struct nfs4_slot *slots;
41 unsigned long used_slots[SLOT_TABLE_SZ];
42 spinlock_t slot_tbl_lock;
43 struct rpc_wait_queue slot_tbl_waitq;
44 wait_queue_head_t slot_waitq;
45 u32 max_slots;
46 u32 max_slotid;
47 u32 highest_used_slotid;
48
49 u32 target_highest_slotid;
50 u32 server_highest_slotid;
51 s32 d_target_highest_slotid;
52 s32 d2_target_highest_slotid;
53 unsigned long generation;
54
55 struct completion complete;
56 unsigned long slot_tbl_state;
57 };
58
59
60
61
62 struct nfs4_session {
63 struct nfs4_sessionid sess_id;
64 u32 flags;
65 unsigned long session_state;
66 u32 hash_alg;
67 u32 ssv_len;
68
69
70 struct nfs4_channel_attrs fc_attrs;
71 struct nfs4_slot_table fc_slot_table;
72 struct nfs4_channel_attrs bc_attrs;
73 struct nfs4_slot_table bc_slot_table;
74 struct nfs_client *clp;
75 };
76
77 enum nfs4_session_state {
78 NFS4_SESSION_INITING,
79 NFS4_SESSION_ESTABLISHED,
80 };
81
82 extern int nfs4_setup_slot_table(struct nfs4_slot_table *tbl,
83 unsigned int max_reqs, const char *queue);
84 extern void nfs4_shutdown_slot_table(struct nfs4_slot_table *tbl);
85 extern struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl);
86 extern struct nfs4_slot *nfs4_lookup_slot(struct nfs4_slot_table *tbl, u32 slotid);
87 extern int nfs4_slot_wait_on_seqid(struct nfs4_slot_table *tbl,
88 u32 slotid, u32 seq_nr,
89 unsigned long timeout);
90 extern bool nfs4_try_to_lock_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot);
91 extern void nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot);
92 extern void nfs4_slot_tbl_drain_complete(struct nfs4_slot_table *tbl);
93 bool nfs41_wake_and_assign_slot(struct nfs4_slot_table *tbl,
94 struct nfs4_slot *slot);
95 void nfs41_wake_slot_table(struct nfs4_slot_table *tbl);
96
97 static inline bool nfs4_slot_tbl_draining(struct nfs4_slot_table *tbl)
98 {
99 return !!test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state);
100 }
101
102 static inline bool nfs4_test_locked_slot(const struct nfs4_slot_table *tbl,
103 u32 slotid)
104 {
105 return !!test_bit(slotid, tbl->used_slots);
106 }
107
108 static inline struct nfs4_session *nfs4_get_session(const struct nfs_client *clp)
109 {
110 return clp->cl_session;
111 }
112
113 #if defined(CONFIG_NFS_V4_1)
114 extern void nfs41_set_target_slotid(struct nfs4_slot_table *tbl,
115 u32 target_highest_slotid);
116 extern void nfs41_update_target_slotid(struct nfs4_slot_table *tbl,
117 struct nfs4_slot *slot,
118 struct nfs4_sequence_res *res);
119
120 extern int nfs4_setup_session_slot_tables(struct nfs4_session *ses);
121
122 extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp);
123 extern void nfs4_destroy_session(struct nfs4_session *session);
124 extern int nfs4_init_session(struct nfs_client *clp);
125 extern int nfs4_init_ds_session(struct nfs_client *, unsigned long);
126
127
128
129
130 static inline int nfs4_has_session(const struct nfs_client *clp)
131 {
132 if (clp->cl_session)
133 return 1;
134 return 0;
135 }
136
137 static inline int nfs4_has_persistent_session(const struct nfs_client *clp)
138 {
139 if (nfs4_has_session(clp))
140 return (clp->cl_session->flags & SESSION4_PERSIST);
141 return 0;
142 }
143
144 static inline void nfs4_copy_sessionid(struct nfs4_sessionid *dst,
145 const struct nfs4_sessionid *src)
146 {
147 memcpy(dst->data, src->data, NFS4_MAX_SESSIONID_LEN);
148 }
149
150 #ifdef CONFIG_CRC32
151
152
153
154
155 #define nfs_session_id_hash(sess_id) \
156 (~crc32_le(0xFFFFFFFF, &(sess_id)->data[0], sizeof((sess_id)->data)))
157 #else
158 #define nfs_session_id_hash(session) (0)
159 #endif
160 #else
161
162 static inline int nfs4_init_session(struct nfs_client *clp)
163 {
164 return 0;
165 }
166
167
168
169
170 static inline int nfs4_has_session(const struct nfs_client *clp)
171 {
172 return 0;
173 }
174
175 static inline int nfs4_has_persistent_session(const struct nfs_client *clp)
176 {
177 return 0;
178 }
179
180 #define nfs_session_id_hash(session) (0)
181
182 #endif
183 #endif
184 #endif