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
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
|
/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _SYNCOP_H
#define _SYNCOP_H
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "xlator.h"
#include <sys/time.h>
#include <pthread.h>
#include <ucontext.h>
#define SYNCENV_PROC_MAX 16
#define SYNCENV_PROC_MIN 2
#define SYNCPROC_IDLE_TIME 600
/*
* Flags for syncopctx valid elements
*/
#define SYNCOPCTX_UID 0x00000001
#define SYNCOPCTX_GID 0x00000002
#define SYNCOPCTX_GROUPS 0x00000004
#define SYNCOPCTX_PID 0x00000008
struct synctask;
struct syncproc;
struct syncenv;
typedef int (*synctask_cbk_t) (int ret, call_frame_t *frame, void *opaque);
typedef int (*synctask_fn_t) (void *opaque);
typedef enum {
SYNCTASK_INIT = 0,
SYNCTASK_RUN,
SYNCTASK_SUSPEND,
SYNCTASK_WAIT,
SYNCTASK_DONE,
SYNCTASK_ZOMBIE,
} synctask_state_t;
/* for one sequential execution of @syncfn */
struct synctask {
struct list_head all_tasks;
struct syncenv *env;
xlator_t *xl;
call_frame_t *frame;
call_frame_t *opframe;
synctask_cbk_t synccbk;
synctask_fn_t syncfn;
synctask_state_t state;
void *opaque;
void *stack;
int woken;
int slept;
int ret;
uid_t uid;
gid_t gid;
ucontext_t ctx;
struct syncproc *proc;
pthread_mutex_t mutex; /* for synchronous spawning of synctask */
pthread_cond_t cond;
int done;
struct list_head waitq; /* can wait only "once" at a time */
};
struct syncproc {
pthread_t processor;
ucontext_t sched;
struct syncenv *env;
struct synctask *current;
};
/* hosts the scheduler thread and framework for executing synctasks */
struct syncenv {
struct syncproc proc[SYNCENV_PROC_MAX];
int procs;
struct list_head runq;
int runcount;
struct list_head waitq;
int waitcount;
int procmin;
int procmax;
pthread_mutex_t mutex;
pthread_cond_t cond;
size_t stacksize;
};
struct synclock {
pthread_mutex_t guard; /* guard the remaining members, pair @cond */
pthread_cond_t cond; /* waiting non-synctasks */
struct list_head waitq; /* waiting synctasks */
gf_boolean_t lock; /* _gf_true or _gf_false, lock status */
struct synctask *owner; /* NULL if current owner is not a synctask */
};
typedef struct synclock synclock_t;
struct syncbarrier {
pthread_mutex_t guard; /* guard the remaining members, pair @cond */
pthread_cond_t cond; /* waiting non-synctasks */
struct list_head waitq; /* waiting synctasks */
int count; /* count the number of wakes */
};
typedef struct syncbarrier syncbarrier_t;
struct syncargs {
int op_ret;
int op_errno;
struct iatt iatt1;
struct iatt iatt2;
dict_t *xattr;
struct statvfs statvfs_buf;
struct iovec *vector;
int count;
struct iobref *iobref;
char *buffer;
dict_t *xdata;
struct gf_flock flock;
/* some more _cbk needs */
uuid_t uuid;
char *errstr;
dict_t *dict;
pthread_mutex_t lock_dict;
syncbarrier_t barrier;
/* do not touch */
struct synctask *task;
pthread_mutex_t mutex;
pthread_cond_t cond;
int done;
gf_dirent_t entries;
};
struct syncopctx {
unsigned int valid; /* valid flags for elements that are set */
uid_t uid;
gid_t gid;
int grpsize;
int ngrps;
gid_t *groups;
pid_t pid;
};
#define __yawn(args) do { \
args->task = synctask_get (); \
if (args->task) \
break; \
pthread_mutex_init (&args->mutex, NULL); \
pthread_cond_init (&args->cond, NULL); \
args->done = 0; \
} while (0)
#define __wake(args) do { \
if (args->task) { \
synctask_wake (args->task); \
} else { \
pthread_mutex_lock (&args->mutex); \
{ \
args->done = 1; \
pthread_cond_signal (&args->cond); \
} \
pthread_mutex_unlock (&args->mutex); \
} \
} while (0)
#define __yield(args) do { \
if (args->task) { \
synctask_yield (args->task); \
} else { \
pthread_mutex_lock (&args->mutex); \
{ \
while (!args->done) \
pthread_cond_wait (&args->cond, \
&args->mutex); \
} \
pthread_mutex_unlock (&args->mutex); \
pthread_mutex_destroy (&args->mutex); \
pthread_cond_destroy (&args->cond); \
} \
} while (0)
#define SYNCOP(subvol, stb, cbk, op, params ...) do { \
struct synctask *task = NULL; \
call_frame_t *frame = NULL; \
\
task = synctask_get (); \
stb->task = task; \
if (task) \
frame = task->opframe; \
else \
frame = syncop_create_frame (THIS); \
\
if (task) { \
frame->root->uid = task->uid; \
frame->root->gid = task->gid; \
} \
\
__yawn (stb); \
\
STACK_WIND_COOKIE (frame, cbk, (void *)stb, subvol, \
op, params); \
\
__yield (stb); \
if (task) \
STACK_RESET (frame->root); \
else \
STACK_DESTROY (frame->root); \
} while (0)
#define SYNCENV_DEFAULT_STACKSIZE (2 * 1024 * 1024)
struct syncenv * syncenv_new (size_t stacksize, int procmin, int procmax);
void syncenv_destroy (struct syncenv *);
void syncenv_scale (struct syncenv *env);
int synctask_new (struct syncenv *, synctask_fn_t, synctask_cbk_t, call_frame_t* frame, void *);
struct synctask *synctask_create (struct syncenv *, synctask_fn_t,
synctask_cbk_t, call_frame_t *, void *);
int synctask_join (struct synctask *task);
void synctask_wake (struct synctask *task);
void synctask_yield (struct synctask *task);
void synctask_waitfor (struct synctask *task, int count);
#define synctask_barrier_init(args) syncbarrier_init (&args->barrier)
#define synctask_barrier_wait(args, n) syncbarrier_wait (&args->barrier, n)
#define synctask_barrier_wake(args) syncbarrier_wake (&args->barrier)
int synctask_setid (struct synctask *task, uid_t uid, gid_t gid);
#define SYNCTASK_SETID(uid, gid) synctask_setid (synctask_get(), uid, gid);
int syncopctx_setfsuid (void *uid);
int syncopctx_setfsgid (void *gid);
int syncopctx_setfsgroups (int count, const void *groups);
int syncopctx_setfspid (void *pid);
static inline call_frame_t *
syncop_create_frame (xlator_t *this)
{
call_frame_t *frame = NULL;
int ngrps = -1;
struct syncopctx *opctx = NULL;
frame = create_frame (this, this->ctx->pool);
if (!frame)
return NULL;
opctx = syncopctx_getctx ();
if (opctx && (opctx->valid & SYNCOPCTX_PID))
frame->root->pid = opctx->pid;
else
frame->root->pid = getpid ();
if (opctx && (opctx->valid & SYNCOPCTX_UID))
frame->root->uid = opctx->uid;
else
frame->root->uid = geteuid ();
if (opctx && (opctx->valid & SYNCOPCTX_GID))
frame->root->gid = opctx->gid;
else
frame->root->gid = getegid ();
if (opctx && (opctx->valid & SYNCOPCTX_GROUPS)) {
ngrps = opctx->ngrps;
if (ngrps != 0 && opctx->groups != NULL) {
if (call_stack_alloc_groups (frame->root, ngrps) != 0) {
STACK_DESTROY (frame->root);
return NULL;
}
memcpy (frame->root->groups, opctx->groups,
(sizeof (gid_t) * ngrps));
}
}
else {
ngrps = getgroups (0, 0);
if (ngrps < 0) {
STACK_DESTROY (frame->root);
return NULL;
}
if (call_stack_alloc_groups (frame->root, ngrps) != 0) {
STACK_DESTROY (frame->root);
return NULL;
}
if (getgroups (ngrps, frame->root->groups) < 0) {
STACK_DESTROY (frame->root);
return NULL;
}
}
return frame;
}
int synclock_init (synclock_t *lock);
int synclock_destroy (synclock_t *lock);
int synclock_lock (synclock_t *lock);
int synclock_trylock (synclock_t *lock);
int synclock_unlock (synclock_t *lock);
int syncbarrier_init (syncbarrier_t *barrier);
int syncbarrier_wait (syncbarrier_t *barrier, int waitfor);
int syncbarrier_wake (syncbarrier_t *barrier);
int syncbarrier_destroy (syncbarrier_t *barrier);
int syncop_lookup (xlator_t *subvol, loc_t *loc, dict_t *xattr_req,
/* out */
struct iatt *iatt, dict_t **xattr_rsp, struct iatt *parent);
int syncop_readdirp (xlator_t *subvol, fd_t *fd, size_t size, off_t off,
dict_t *dict,
/* out */
gf_dirent_t *entries);
int syncop_readdir (xlator_t *subvol, fd_t *fd, size_t size, off_t off,
gf_dirent_t *entries);
int syncop_opendir (xlator_t *subvol, loc_t *loc, fd_t *fd);
int syncop_setattr (xlator_t *subvol, loc_t *loc, struct iatt *iatt, int valid,
/* out */
struct iatt *preop, struct iatt *postop);
int syncop_fsetattr (xlator_t *subvol, fd_t *fd, struct iatt *iatt, int valid,
/* out */
struct iatt *preop, struct iatt *postop);
int syncop_statfs (xlator_t *subvol, loc_t *loc, struct statvfs *buf);
int syncop_setxattr (xlator_t *subvol, loc_t *loc, dict_t *dict, int32_t flags);
int syncop_fsetxattr (xlator_t *subvol, fd_t *fd, dict_t *dict, int32_t flags);
int syncop_listxattr (xlator_t *subvol, loc_t *loc, dict_t **dict);
int syncop_getxattr (xlator_t *xl, loc_t *loc, dict_t **dict, const char *key);
int syncop_fgetxattr (xlator_t *xl, fd_t *fd, dict_t **dict, const char *key);
int syncop_removexattr (xlator_t *subvol, loc_t *loc, const char *name,
dict_t *xdata);
int syncop_fremovexattr (xlator_t *subvol, fd_t *fd, const char *name,
dict_t *xdata);
int syncop_create (xlator_t *subvol, loc_t *loc, int32_t flags, mode_t mode,
fd_t *fd, dict_t *dict, struct iatt *iatt);
int syncop_open (xlator_t *subvol, loc_t *loc, int32_t flags, fd_t *fd);
int syncop_close (fd_t *fd);
int syncop_write (xlator_t *subvol, fd_t *fd, const char *buf, int size,
off_t offset, struct iobref *iobref, uint32_t flags);
int syncop_writev (xlator_t *subvol, fd_t *fd, const struct iovec *vector,
int32_t count, off_t offset, struct iobref *iobref,
uint32_t flags);
int syncop_readv (xlator_t *subvol, fd_t *fd, size_t size, off_t off,
uint32_t flags,
/* out */
struct iovec **vector, int *count, struct iobref **iobref);
int syncop_ftruncate (xlator_t *subvol, fd_t *fd, off_t offset);
int syncop_truncate (xlator_t *subvol, loc_t *loc, off_t offset);
int syncop_unlink (xlator_t *subvol, loc_t *loc);
int syncop_rmdir (xlator_t *subvol, loc_t *loc, int flags);
int syncop_fsync (xlator_t *subvol, fd_t *fd, int dataonly);
int syncop_flush (xlator_t *subvol, fd_t *fd);
int syncop_fstat (xlator_t *subvol, fd_t *fd, struct iatt *stbuf);
int syncop_stat (xlator_t *subvol, loc_t *loc, struct iatt *stbuf);
int syncop_symlink (xlator_t *subvol, loc_t *loc, const char *newpath,
dict_t *dict, struct iatt *iatt);
int syncop_readlink (xlator_t *subvol, loc_t *loc, char **buffer, size_t size);
int syncop_mknod (xlator_t *subvol, loc_t *loc, mode_t mode, dev_t rdev,
dict_t *dict, struct iatt *iatt);
int syncop_mkdir (xlator_t *subvol, loc_t *loc, mode_t mode, dict_t *dict,
struct iatt *iatt);
int syncop_link (xlator_t *subvol, loc_t *oldloc, loc_t *newloc);
int syncop_fsyncdir (xlator_t *subvol, fd_t *fd, int datasync);
int syncop_access (xlator_t *subvol, loc_t *loc, int32_t mask);
int syncop_fallocate(xlator_t *subvol, fd_t *fd, int32_t keep_size, off_t offset,
size_t len);
int syncop_discard(xlator_t *subvol, fd_t *fd, off_t offset, size_t len);
int syncop_zerofill(xlator_t *subvol, fd_t *fd, off_t offset, off_t len);
int syncop_rename (xlator_t *subvol, loc_t *oldloc, loc_t *newloc);
int syncop_lk (xlator_t *subvol, fd_t *fd, int cmd, struct gf_flock *flock);
#endif /* _SYNCOP_H */
|
