1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
|
/*
Copyright (c) 2006-2010 Gluster, Inc. <http://www.gluster.com>
This file is part of GlusterFS.
GlusterFS is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
GlusterFS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see
<http://www.gnu.org/licenses/>.
*/
/*
This file defines MACROS and static inlines used to emulate a function
call over asynchronous communication with remote server
*/
#ifndef _STACK_H
#define _STACK_H
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
struct _call_stack_t;
typedef struct _call_stack_t call_stack_t;
struct _call_frame_t;
typedef struct _call_frame_t call_frame_t;
struct _call_pool_t;
typedef struct _call_pool_t call_pool_t;
#include <sys/time.h>
#include "xlator.h"
#include "dict.h"
#include "list.h"
#include "common-utils.h"
#include "globals.h"
typedef int32_t (*ret_fn_t) (call_frame_t *frame,
call_frame_t *prev_frame,
xlator_t *this,
int32_t op_ret,
int32_t op_errno,
...);
struct _call_pool_t {
union {
struct list_head all_frames;
struct {
call_stack_t *next_call;
call_stack_t *prev_call;
} all_stacks;
};
int64_t cnt;
gf_lock_t lock;
struct mem_pool *frame_mem_pool;
struct mem_pool *stack_mem_pool;
};
struct _call_frame_t {
call_stack_t *root; /* stack root */
call_frame_t *parent; /* previous BP */
call_frame_t *next;
call_frame_t *prev; /* maintainence list */
void *local; /* local variables */
xlator_t *this; /* implicit object */
ret_fn_t ret; /* op_return address */
int32_t ref_count;
gf_lock_t lock;
void *cookie; /* unique cookie */
gf_boolean_t complete;
glusterfs_fop_t op;
struct timeval begin; /* when this frame was created */
struct timeval end; /* when this frame completed */
};
struct _call_stack_t {
union {
struct list_head all_frames;
struct {
call_stack_t *next_call;
call_stack_t *prev_call;
};
};
call_pool_t *pool;
void *trans;
uint64_t unique;
void *state; /* pointer to request state */
uid_t uid;
gid_t gid;
pid_t pid;
uint32_t ngrps;
uint32_t groups[GF_REQUEST_MAXGROUPS];
uint64_t lk_owner;
call_frame_t frames;
int32_t op;
int8_t type;
};
#define frame_set_uid_gid(frm, u, g) \
do { \
if (frm) { \
(frm)->root->uid = u; \
(frm)->root->gid = g; \
(frm)->root->ngrps = 0; \
} \
} while (0); \
struct xlator_fops;
void
gf_set_fop_from_fn_pointer (call_frame_t *frame, struct xlator_fops *fops,
void *fn);
void
gf_update_latency (call_frame_t *frame);
static inline void
FRAME_DESTROY (call_frame_t *frame)
{
void *local = NULL;
if (frame->next)
frame->next->prev = frame->prev;
if (frame->prev)
frame->prev->next = frame->next;
if (frame->local) {
local = frame->local;
frame->local = NULL;
}
LOCK_DESTROY (&frame->lock);
mem_put (frame->root->pool->frame_mem_pool, frame);
if (local)
GF_FREE (local);
}
static inline void
STACK_DESTROY (call_stack_t *stack)
{
void *local = NULL;
LOCK (&stack->pool->lock);
{
list_del_init (&stack->all_frames);
stack->pool->cnt--;
}
UNLOCK (&stack->pool->lock);
if (stack->frames.local) {
local = stack->frames.local;
stack->frames.local = NULL;
}
LOCK_DESTROY (&stack->frames.lock);
while (stack->frames.next) {
FRAME_DESTROY (stack->frames.next);
}
mem_put (stack->pool->stack_mem_pool, stack);
if (local)
GF_FREE (local);
}
#define cbk(x) cbk_##x
/* make a call */
#define STACK_WIND(frame, rfn, obj, fn, params ...) \
do { \
call_frame_t *_new = NULL; \
xlator_t *old_THIS = NULL; \
\
_new = mem_get0 (frame->root->pool->frame_mem_pool); \
if (!_new) { \
gf_log ("stack", GF_LOG_ERROR, "alloc failed"); \
break; \
} \
typeof(fn##_cbk) tmp_cbk = rfn; \
_new->root = frame->root; \
_new->next = frame->root->frames.next; \
_new->prev = &frame->root->frames; \
if (frame->root->frames.next) \
frame->root->frames.next->prev = _new; \
frame->root->frames.next = _new; \
_new->this = obj; \
_new->ret = (ret_fn_t) tmp_cbk; \
_new->parent = frame; \
_new->cookie = _new; \
LOCK_INIT (&_new->lock); \
frame->ref_count++; \
old_THIS = THIS; \
THIS = obj; \
fn (_new, obj, params); \
THIS = old_THIS; \
} while (0)
/* make a call with a cookie */
#define STACK_WIND_COOKIE(frame, rfn, cky, obj, fn, params ...) \
do { \
call_frame_t *_new = NULL; \
xlator_t *old_THIS = NULL; \
\
_new = mem_get0 (frame->root->pool->frame_mem_pool); \
if (!_new) { \
gf_log ("stack", GF_LOG_ERROR, "alloc failed"); \
break; \
} \
typeof(fn##_cbk) tmp_cbk = rfn; \
_new->root = frame->root; \
_new->next = frame->root->frames.next; \
_new->prev = &frame->root->frames; \
if (frame->root->frames.next) \
frame->root->frames.next->prev = _new; \
frame->root->frames.next = _new; \
_new->this = obj; \
_new->ret = (ret_fn_t) tmp_cbk; \
_new->parent = frame; \
_new->cookie = cky; \
LOCK_INIT (&_new->lock); \
frame->ref_count++; \
fn##_cbk = rfn; \
old_THIS = THIS; \
THIS = obj; \
fn (_new, obj, params); \
THIS = old_THIS; \
} while (0)
/* return from function */
#define STACK_UNWIND(frame, params ...) \
do { \
ret_fn_t fn = NULL; \
call_frame_t *_parent = NULL; \
xlator_t *old_THIS = NULL; \
if (!frame) { \
gf_log ("stack", GF_LOG_CRITICAL, "!frame"); \
break; \
} \
fn = frame->ret; \
_parent = frame->parent; \
_parent->ref_count--; \
old_THIS = THIS; \
THIS = _parent->this; \
frame->complete = _gf_true; \
fn (_parent, frame->cookie, _parent->this, params); \
THIS = old_THIS; \
} while (0)
/* return from function in type-safe way */
#define STACK_UNWIND_STRICT(op, frame, params ...) \
do { \
fop_##op##_cbk_t fn = NULL; \
call_frame_t *_parent = NULL; \
xlator_t *old_THIS = NULL; \
\
if (!frame) { \
gf_log ("stack", GF_LOG_CRITICAL, "!frame"); \
break; \
} \
fn = (fop_##op##_cbk_t )frame->ret; \
_parent = frame->parent; \
_parent->ref_count--; \
old_THIS = THIS; \
THIS = _parent->this; \
frame->complete = _gf_true; \
fn (_parent, frame->cookie, _parent->this, params); \
THIS = old_THIS; \
} while (0)
static inline call_frame_t *
copy_frame (call_frame_t *frame)
{
call_stack_t *newstack = NULL;
call_stack_t *oldstack = NULL;
if (!frame) {
return NULL;
}
newstack = mem_get0 (frame->root->pool->stack_mem_pool);
if (newstack == NULL) {
return NULL;
}
oldstack = frame->root;
newstack->uid = oldstack->uid;
newstack->gid = oldstack->gid;
newstack->pid = oldstack->pid;
newstack->ngrps = oldstack->ngrps;
memcpy (newstack->groups, oldstack->groups,
sizeof (uint32_t) * GF_REQUEST_MAXGROUPS);
newstack->unique = oldstack->unique;
newstack->frames.this = frame->this;
newstack->frames.root = newstack;
newstack->pool = oldstack->pool;
newstack->lk_owner = oldstack->lk_owner;
LOCK_INIT (&newstack->frames.lock);
LOCK (&oldstack->pool->lock);
{
list_add (&newstack->all_frames, &oldstack->all_frames);
newstack->pool->cnt++;
}
UNLOCK (&oldstack->pool->lock);
return &newstack->frames;
}
static inline call_frame_t *
create_frame (xlator_t *xl, call_pool_t *pool)
{
call_stack_t *stack = NULL;
if (!xl || !pool) {
return NULL;
}
stack = mem_get0 (pool->stack_mem_pool);
if (!stack)
return NULL;
stack->pool = pool;
stack->frames.root = stack;
stack->frames.this = xl;
LOCK (&pool->lock);
{
list_add (&stack->all_frames, &pool->all_frames);
pool->cnt++;
}
UNLOCK (&pool->lock);
LOCK_INIT (&stack->frames.lock);
return &stack->frames;
}
void
gf_proc_dump_pending_frames(call_pool_t *call_pool);
#endif /* _STACK_H */
|
