1
2
3
4
5
6
7
8
9#ifndef _LINUX_SUNRPC_SCHED_H_
10#define _LINUX_SUNRPC_SCHED_H_
11
12#include <linux/timer.h>
13#include <linux/ktime.h>
14#include <linux/sunrpc/types.h>
15#include <linux/spinlock.h>
16#include <linux/wait.h>
17#include <linux/workqueue.h>
18#include <linux/sunrpc/xdr.h>
19
20
21
22
23struct rpc_procinfo;
24struct rpc_message {
25 struct rpc_procinfo * rpc_proc;
26 void * rpc_argp;
27 void * rpc_resp;
28 struct rpc_cred * rpc_cred;
29};
30
31struct rpc_call_ops;
32struct rpc_wait_queue;
33struct rpc_wait {
34 struct list_head list;
35 struct list_head links;
36 struct list_head timer_list;
37 unsigned long expires;
38};
39
40
41
42
43struct rpc_task {
44 atomic_t tk_count;
45 struct list_head tk_task;
46 struct rpc_clnt * tk_client;
47 struct rpc_rqst * tk_rqstp;
48
49
50
51
52 struct rpc_message tk_msg;
53
54
55
56
57
58
59 void (*tk_callback)(struct rpc_task *);
60 void (*tk_action)(struct rpc_task *);
61 const struct rpc_call_ops *tk_ops;
62 void * tk_calldata;
63
64 unsigned long tk_timeout;
65 unsigned long tk_runstate;
66 struct workqueue_struct *tk_workqueue;
67
68
69 struct rpc_wait_queue *tk_waitqueue;
70 union {
71 struct work_struct tk_work;
72 struct rpc_wait tk_wait;
73 } u;
74
75 ktime_t tk_start;
76
77 pid_t tk_owner;
78 int tk_status;
79 unsigned short tk_flags;
80 unsigned short tk_timeouts;
81
82#ifdef RPC_DEBUG
83 unsigned short tk_pid;
84#endif
85 unsigned char tk_priority : 2,
86 tk_garb_retry : 2,
87 tk_cred_retry : 2,
88 tk_rebind_retry : 2;
89};
90
91typedef void (*rpc_action)(struct rpc_task *);
92
93struct rpc_call_ops {
94 void (*rpc_call_prepare)(struct rpc_task *, void *);
95 void (*rpc_call_done)(struct rpc_task *, void *);
96 void (*rpc_count_stats)(struct rpc_task *, void *);
97 void (*rpc_release)(void *);
98};
99
100struct rpc_task_setup {
101 struct rpc_task *task;
102 struct rpc_clnt *rpc_client;
103 const struct rpc_message *rpc_message;
104 const struct rpc_call_ops *callback_ops;
105 void *callback_data;
106 struct workqueue_struct *workqueue;
107 unsigned short flags;
108 signed char priority;
109};
110
111
112
113
114#define RPC_TASK_ASYNC 0x0001
115#define RPC_TASK_SWAPPER 0x0002
116#define RPC_CALL_MAJORSEEN 0x0020
117#define RPC_TASK_ROOTCREDS 0x0040
118#define RPC_TASK_DYNAMIC 0x0080
119#define RPC_TASK_KILLED 0x0100
120#define RPC_TASK_SOFT 0x0200
121#define RPC_TASK_SOFTCONN 0x0400
122#define RPC_TASK_SENT 0x0800
123#define RPC_TASK_TIMEOUT 0x1000
124#define RPC_TASK_NOCONNECT 0x2000
125
126#define RPC_IS_ASYNC(t) ((t)->tk_flags & RPC_TASK_ASYNC)
127#define RPC_IS_SWAPPER(t) ((t)->tk_flags & RPC_TASK_SWAPPER)
128#define RPC_DO_ROOTOVERRIDE(t) ((t)->tk_flags & RPC_TASK_ROOTCREDS)
129#define RPC_ASSASSINATED(t) ((t)->tk_flags & RPC_TASK_KILLED)
130#define RPC_IS_SOFT(t) ((t)->tk_flags & (RPC_TASK_SOFT|RPC_TASK_TIMEOUT))
131#define RPC_IS_SOFTCONN(t) ((t)->tk_flags & RPC_TASK_SOFTCONN)
132#define RPC_WAS_SENT(t) ((t)->tk_flags & RPC_TASK_SENT)
133
134#define RPC_TASK_RUNNING 0
135#define RPC_TASK_QUEUED 1
136#define RPC_TASK_ACTIVE 2
137
138#define RPC_IS_RUNNING(t) test_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)
139#define rpc_set_running(t) set_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)
140#define rpc_test_and_set_running(t) \
141 test_and_set_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)
142#define rpc_clear_running(t) \
143 do { \
144 smp_mb__before_clear_bit(); \
145 clear_bit(RPC_TASK_RUNNING, &(t)->tk_runstate); \
146 smp_mb__after_clear_bit(); \
147 } while (0)
148
149#define RPC_IS_QUEUED(t) test_bit(RPC_TASK_QUEUED, &(t)->tk_runstate)
150#define rpc_set_queued(t) set_bit(RPC_TASK_QUEUED, &(t)->tk_runstate)
151#define rpc_clear_queued(t) \
152 do { \
153 smp_mb__before_clear_bit(); \
154 clear_bit(RPC_TASK_QUEUED, &(t)->tk_runstate); \
155 smp_mb__after_clear_bit(); \
156 } while (0)
157
158#define RPC_IS_ACTIVATED(t) test_bit(RPC_TASK_ACTIVE, &(t)->tk_runstate)
159
160
161
162
163
164
165#define RPC_PRIORITY_LOW (-1)
166#define RPC_PRIORITY_NORMAL (0)
167#define RPC_PRIORITY_HIGH (1)
168#define RPC_PRIORITY_PRIVILEGED (2)
169#define RPC_NR_PRIORITY (1 + RPC_PRIORITY_PRIVILEGED - RPC_PRIORITY_LOW)
170
171struct rpc_timer {
172 struct timer_list timer;
173 struct list_head list;
174 unsigned long expires;
175};
176
177
178
179
180struct rpc_wait_queue {
181 spinlock_t lock;
182 struct list_head tasks[RPC_NR_PRIORITY];
183 pid_t owner;
184 unsigned char maxpriority;
185 unsigned char priority;
186 unsigned char nr;
187 unsigned short qlen;
188 struct rpc_timer timer_list;
189#if defined(RPC_DEBUG) || defined(RPC_TRACEPOINTS)
190 const char * name;
191#endif
192};
193
194
195
196
197
198
199#define RPC_BATCH_COUNT 16
200#define RPC_IS_PRIORITY(q) ((q)->maxpriority > 0)
201
202
203
204
205struct rpc_task *rpc_new_task(const struct rpc_task_setup *);
206struct rpc_task *rpc_run_task(const struct rpc_task_setup *);
207struct rpc_task *rpc_run_bc_task(struct rpc_rqst *req,
208 const struct rpc_call_ops *ops);
209void rpc_put_task(struct rpc_task *);
210void rpc_put_task_async(struct rpc_task *);
211void rpc_exit_task(struct rpc_task *);
212void rpc_exit(struct rpc_task *, int);
213void rpc_release_calldata(const struct rpc_call_ops *, void *);
214void rpc_killall_tasks(struct rpc_clnt *);
215void rpc_execute(struct rpc_task *);
216void rpc_init_priority_wait_queue(struct rpc_wait_queue *, const char *);
217void rpc_init_wait_queue(struct rpc_wait_queue *, const char *);
218void rpc_destroy_wait_queue(struct rpc_wait_queue *);
219void rpc_sleep_on(struct rpc_wait_queue *, struct rpc_task *,
220 rpc_action action);
221void rpc_sleep_on_priority(struct rpc_wait_queue *,
222 struct rpc_task *,
223 rpc_action action,
224 int priority);
225void rpc_wake_up_queued_task(struct rpc_wait_queue *,
226 struct rpc_task *);
227void rpc_wake_up(struct rpc_wait_queue *);
228struct rpc_task *rpc_wake_up_next(struct rpc_wait_queue *);
229struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *,
230 bool (*)(struct rpc_task *, void *),
231 void *);
232void rpc_wake_up_status(struct rpc_wait_queue *, int);
233void rpc_delay(struct rpc_task *, unsigned long);
234void * rpc_malloc(struct rpc_task *, size_t);
235void rpc_free(void *);
236int rpciod_up(void);
237void rpciod_down(void);
238int __rpc_wait_for_completion_task(struct rpc_task *task, int (*)(void *));
239#ifdef RPC_DEBUG
240struct net;
241void rpc_show_tasks(struct net *);
242#endif
243int rpc_init_mempool(void);
244void rpc_destroy_mempool(void);
245extern struct workqueue_struct *rpciod_workqueue;
246void rpc_prepare_task(struct rpc_task *task);
247
248static inline int rpc_wait_for_completion_task(struct rpc_task *task)
249{
250 return __rpc_wait_for_completion_task(task, NULL);
251}
252
253#if defined(RPC_DEBUG) || defined (RPC_TRACEPOINTS)
254static inline const char * rpc_qname(const struct rpc_wait_queue *q)
255{
256 return ((q && q->name) ? q->name : "unknown");
257}
258
259static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,
260 const char *name)
261{
262 q->name = name;
263}
264#else
265static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,
266 const char *name)
267{
268}
269#endif
270
271#endif
272