summaryrefslogtreecommitdiffstats
path: root/xlators/mgmt/glusterd/src/glusterd-hooks.c
blob: 7519ca2faae95353a7412ccb8b9c3e1a0f199b12 (plain)
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
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
/*
   Copyright (c) 2007-2012 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.
*/

#include "globals.h"
#include "glusterfs.h"
#include "dict.h"
#include "xlator.h"
#include "logging.h"
#include "run.h"
#include "defaults.h"
#include "syscall.h"
#include "compat.h"
#include "compat-errno.h"
#include "glusterd.h"
#include "glusterd-sm.h"
#include "glusterd-op-sm.h"
#include "glusterd-utils.h"
#include "glusterd-store.h"
#include "glusterd-hooks.h"
#include "glusterd-messages.h"

#include <fnmatch.h>

#define EMPTY ""
char glusterd_hook_dirnames[GD_OP_MAX][256] =
{
        [GD_OP_NONE]                    = EMPTY,
        [GD_OP_CREATE_VOLUME]           = "create",
        [GD_OP_START_BRICK]             = EMPTY,
        [GD_OP_STOP_BRICK]              = EMPTY,
        [GD_OP_DELETE_VOLUME]           = "delete",
        [GD_OP_START_VOLUME]            = "start",
        [GD_OP_STOP_VOLUME]             = "stop",
        [GD_OP_DEFRAG_VOLUME]           = EMPTY,
        [GD_OP_ADD_BRICK]               = "add-brick",
        [GD_OP_REMOVE_BRICK]            = "remove-brick",
        [GD_OP_REPLACE_BRICK]           = EMPTY,
        [GD_OP_SET_VOLUME]              = "set",
        [GD_OP_RESET_VOLUME]            = "reset",
        [GD_OP_SYNC_VOLUME]             = EMPTY,
        [GD_OP_LOG_ROTATE]              = EMPTY,
        [GD_OP_GSYNC_CREATE]            = "gsync-create",
        [GD_OP_GSYNC_SET]               = EMPTY,
        [GD_OP_PROFILE_VOLUME]          = EMPTY,
        [GD_OP_QUOTA]                   = EMPTY,
        [GD_OP_STATUS_VOLUME]           = EMPTY,
        [GD_OP_REBALANCE]               = EMPTY,
        [GD_OP_HEAL_VOLUME]             = EMPTY,
        [GD_OP_STATEDUMP_VOLUME]        = EMPTY,
        [GD_OP_LIST_VOLUME]             = EMPTY,
        [GD_OP_CLEARLOCKS_VOLUME]       = EMPTY,
        [GD_OP_DEFRAG_BRICK_VOLUME]     = EMPTY,
        [GD_OP_RESET_BRICK]             = EMPTY,
};
#undef EMPTY

static gf_boolean_t
glusterd_is_hook_enabled (char *script)
{
        return (script[0] == 'S' && (fnmatch ("*.rpmsave", script, 0) != 0)
                                 && (fnmatch ("*.rpmnew", script, 0) != 0));
}

int
glusterd_hooks_create_hooks_directory (char *basedir)
{
        int  ret                                        = -1;
        int  op                                         = GD_OP_NONE;
        int  type                                       = GD_COMMIT_HOOK_NONE;
        char version_dir[PATH_MAX]                      = {0, };
        char path[PATH_MAX]                             = {0, };
        char *cmd_subdir                                = NULL;
        char type_subdir[GD_COMMIT_HOOK_MAX][256]       = {{0, },
                                                           "pre",
                                                           "post"};
        glusterd_conf_t *priv                           = NULL;

        priv = THIS->private;

        snprintf (path, sizeof (path), "%s/hooks", basedir);
        ret = mkdir_p (path, 0777, _gf_true);
        if (ret) {
                gf_msg (THIS->name, GF_LOG_CRITICAL, errno,
                        GD_MSG_CREATE_DIR_FAILED, "Unable to create %s",
                        path);
                goto out;
        }

        GLUSTERD_GET_HOOKS_DIR (version_dir, GLUSTERD_HOOK_VER, priv);
        ret = mkdir_p (version_dir, 0777, _gf_true);
        if (ret) {
                gf_msg (THIS->name, GF_LOG_CRITICAL, errno,
                        GD_MSG_CREATE_DIR_FAILED, "Unable to create %s",
                        version_dir);
                goto out;
        }

        for (op = GD_OP_NONE+1; op < GD_OP_MAX; op++) {
                cmd_subdir = glusterd_hooks_get_hooks_cmd_subdir (op);
                if (strlen (cmd_subdir) == 0)
                        continue;

                snprintf (path, sizeof (path), "%s/%s", version_dir,
                          cmd_subdir);
                ret = mkdir_p (path, 0777, _gf_true);
                if (ret) {
                        gf_msg (THIS->name, GF_LOG_CRITICAL, errno,
                                GD_MSG_CREATE_DIR_FAILED,
                                "Unable to create %s",
                                path);
                        goto out;
                }

                for (type = GD_COMMIT_HOOK_PRE; type < GD_COMMIT_HOOK_MAX;
                     type++) {
                        snprintf (path, sizeof (path), "%s/%s/%s",
                                  version_dir, cmd_subdir, type_subdir[type]);
                        ret = mkdir_p (path, 0777, _gf_true);
                        if (ret) {
                                gf_msg (THIS->name, GF_LOG_CRITICAL, errno,
                                        GD_MSG_CREATE_DIR_FAILED,
                                        "Unable to create %s",
                                        path);
                                goto out;
                        }
                }
        }

        ret = 0;
out:
        return ret;
}

char*
glusterd_hooks_get_hooks_cmd_subdir (glusterd_op_t op)
{
        GF_ASSERT ((op > GD_OP_NONE) && (op < GD_OP_MAX));

        return glusterd_hook_dirnames[op];
}

void
glusterd_hooks_add_working_dir (runner_t *runner, glusterd_conf_t *priv)
{
        runner_argprintf (runner, "--gd-workdir=%s", priv->workdir);
}

void
glusterd_hooks_add_op (runner_t *runner, char *op)
{
        runner_argprintf (runner, "--volume-op=%s", op);
}

void
glusterd_hooks_add_hooks_version (runner_t* runner)
{
        runner_argprintf (runner, "--version=%d", GLUSTERD_HOOK_VER);
}

static void
glusterd_hooks_add_custom_args (dict_t *dict, runner_t *runner)
{
        char      *hooks_args     = NULL;
        int32_t    ret            = -1;
        xlator_t  *this           = NULL;

        this = THIS;
        GF_VALIDATE_OR_GOTO ("glusterd", this, out);
        GF_VALIDATE_OR_GOTO (this->name, dict, out);
        GF_VALIDATE_OR_GOTO (this->name, runner, out);

        ret = dict_get_str (dict, "hooks_args", &hooks_args);
        if (ret)
                gf_msg_debug (this->name, 0,
                        "No Hooks Arguments.");
        else
                gf_msg_debug (this->name, 0,
                        "Hooks Args = %s", hooks_args);

        if (hooks_args)
                runner_argprintf (runner, "%s", hooks_args);

out:
        return;
}


int
glusterd_hooks_set_volume_args (dict_t *dict, runner_t *runner)
{
        int     i               = 0;
        int     count           = 0;
        int     ret             = -1;
        char    query[1024]     = {0,};
        char    *key            = NULL;
        char    *value          = NULL;

        ret = dict_get_int32 (dict, "count", &count);
        if (ret)
                goto out;

        /* This will not happen unless op_ctx
         * is corrupted*/
        if (!count)
                goto out;

        runner_add_arg (runner, "-o");
        for (i = 1; ret == 0; i++) {
                snprintf (query, sizeof (query), "key%d", i);
                ret = dict_get_str (dict, query, &key);
                if (ret)
                       continue;

                snprintf (query, sizeof (query), "value%d", i);
                ret = dict_get_str (dict, query, &value);
                if (ret)
                       continue;

                runner_argprintf (runner, "%s=%s", key, value);
        }

        glusterd_hooks_add_custom_args (dict, runner);

        ret = 0;
out:
        return ret;
}

static int
glusterd_hooks_add_op_args (runner_t *runner, glusterd_op_t op,
                            dict_t *op_ctx, glusterd_commit_hook_type_t type)
{
        int                     vol_count        = 0;
        gf_boolean_t            truth            = _gf_false;
        glusterd_volinfo_t      *voliter         = NULL;
        glusterd_conf_t         *priv            = NULL;
        int                     ret              = -1;

        priv = THIS->private;
        cds_list_for_each_entry (voliter, &priv->volumes, vol_list) {
                if (glusterd_is_volume_started (voliter))
                        vol_count++;
        }

        ret = 0;
        switch (op) {
                case GD_OP_START_VOLUME:
                        if (type == GD_COMMIT_HOOK_PRE &&
                            vol_count == 0)
                                truth = _gf_true;

                        else if (type == GD_COMMIT_HOOK_POST &&
                                 vol_count == 1)
                                truth = _gf_true;

                        else
                                truth = _gf_false;

                        runner_argprintf (runner, "--first=%s",
                                          truth? "yes":"no");

                        glusterd_hooks_add_hooks_version (runner);
                        glusterd_hooks_add_op (runner, "start");
                        glusterd_hooks_add_working_dir (runner, priv);

                        break;

                case GD_OP_STOP_VOLUME:
                        if (type == GD_COMMIT_HOOK_PRE &&
                            vol_count == 1)
                                truth = _gf_true;

                        else if (type == GD_COMMIT_HOOK_POST &&
                                 vol_count == 0)
                                truth = _gf_true;

                        else
                                truth = _gf_false;

                        runner_argprintf (runner, "--last=%s",
                                          truth? "yes":"no");
                        break;

                case GD_OP_SET_VOLUME:
                        ret = glusterd_hooks_set_volume_args (op_ctx, runner);
                        glusterd_hooks_add_working_dir (runner, priv);
                        break;

                case GD_OP_GSYNC_CREATE:
                        glusterd_hooks_add_custom_args (op_ctx, runner);
                        break;

                case GD_OP_ADD_BRICK:
                        glusterd_hooks_add_hooks_version (runner);
                        glusterd_hooks_add_op (runner, "add-brick");
                        glusterd_hooks_add_working_dir (runner, priv);
                        break;

               case GD_OP_RESET_VOLUME:
                        glusterd_hooks_add_hooks_version (runner);
                        glusterd_hooks_add_op (runner, "reset");
                        glusterd_hooks_add_working_dir (runner, priv);
                        break;

                default:
                        break;

        }

        return ret;
}

int
glusterd_hooks_run_hooks (char *hooks_path, glusterd_op_t op, dict_t *op_ctx,
                          glusterd_commit_hook_type_t type)
{
        xlator_t        *this                   = NULL;
        runner_t         runner                 = {0,};
        DIR             *hookdir                = NULL;
        struct dirent   *entry                  = NULL;
        struct dirent    scratch[2]             = {{0,},};
        char            *volname                = NULL;
        char           **lines                  = NULL;
        int              N                      = 8; /*arbitrary*/
        int              lineno                 = 0;
        int              line_count             = 0;
        int              ret                    = -1;

        this = THIS;

        ret = dict_get_str (op_ctx, "volname", &volname);
        if (ret) {
                gf_msg (this->name, GF_LOG_CRITICAL, errno,
                        GD_MSG_DICT_GET_FAILED, "Failed to get volname "
                        "from operation context");
                goto out;
        }

        hookdir = sys_opendir (hooks_path);
        if (!hookdir) {
                ret = -1;
                gf_msg (this->name, GF_LOG_ERROR, errno,
                        GD_MSG_DIR_OP_FAILED,
                        "Failed to open dir %s",
                        hooks_path);
                goto out;
        }

        lines = GF_CALLOC (1, N * sizeof (*lines), gf_gld_mt_charptr);
        if (!lines) {
                ret = -1;
                goto out;
        }

        ret = -1;
        line_count = 0;
        GF_FOR_EACH_ENTRY_IN_DIR (entry, hookdir, scratch);
        while (entry) {
                if (line_count == N-1) {
                        N *= 2;
                        lines = GF_REALLOC (lines, N * sizeof (char *));
                        if (!lines)
                                goto out;
                }

                if (glusterd_is_hook_enabled (entry->d_name)) {
                        lines[line_count] = gf_strdup (entry->d_name);
                        line_count++;
                }

                GF_FOR_EACH_ENTRY_IN_DIR (entry, hookdir, scratch);
        }

        lines[line_count] = NULL;
        lines = GF_REALLOC (lines, (line_count + 1) * sizeof (char *));
        if (!lines)
                goto out;

        qsort (lines, line_count, sizeof (*lines), glusterd_compare_lines);

        for (lineno = 0; lineno < line_count; lineno++) {

                runinit (&runner);
                runner_argprintf (&runner, "%s/%s", hooks_path, lines[lineno]);
                /*Add future command line arguments to hook scripts below*/
                runner_argprintf (&runner, "--volname=%s", volname);
                ret = glusterd_hooks_add_op_args (&runner, op, op_ctx, type);
                if (ret) {
                        gf_msg (this->name, GF_LOG_ERROR, 0,
                                GD_MSG_ADD_OP_ARGS_FAIL, "Failed to add "
                                "command specific arguments");
                        goto out;
                }

                ret = runner_run_reuse (&runner);
                if (ret) {
                        runner_log (&runner, this->name, GF_LOG_ERROR,
                                    "Failed to execute script");
                } else {
                        runner_log (&runner, this->name, GF_LOG_INFO,
                                    "Ran script");
                }
                runner_end (&runner);
        }

        ret = 0;
out:
        if (lines) {
                for (lineno = 0; lineno < line_count+1; lineno++)
                        GF_FREE (lines[lineno]);

                GF_FREE (lines);
        }

        if (hookdir)
                sys_closedir (hookdir);

        return ret;
}

int
glusterd_hooks_post_stub_enqueue (char *scriptdir, glusterd_op_t op,
                                  dict_t *op_ctx)
{
        int                     ret     = -1;
        glusterd_hooks_stub_t   *stub   = NULL;
        glusterd_hooks_private_t *hooks_priv = NULL;
        glusterd_conf_t         *conf   = NULL;

        conf = THIS->private;
        hooks_priv = conf->hooks_priv;

        ret = glusterd_hooks_stub_init (&stub, scriptdir, op, op_ctx);
        if (ret)
                goto out;

        pthread_mutex_lock (&hooks_priv->mutex);
        {
                hooks_priv->waitcount++;
                cds_list_add_tail (&stub->all_hooks, &hooks_priv->list);
                pthread_cond_signal (&hooks_priv->cond);
        }
        pthread_mutex_unlock (&hooks_priv->mutex);

        ret = 0;
out:
        return ret;
}

int
glusterd_hooks_stub_init (glusterd_hooks_stub_t **stub, char *scriptdir,
                          glusterd_op_t op, dict_t *op_ctx)
{
        int                     ret             = -1;
        glusterd_hooks_stub_t   *hooks_stub     = NULL;

        GF_ASSERT (stub);
        if (!stub)
                goto out;

        hooks_stub = GF_CALLOC (1, sizeof (*hooks_stub),
                                gf_gld_mt_hooks_stub_t);
        if (!hooks_stub)
                goto out;

        CDS_INIT_LIST_HEAD (&hooks_stub->all_hooks);
        hooks_stub->op = op;
        hooks_stub->scriptdir = gf_strdup (scriptdir);
        if (!hooks_stub->scriptdir)
                goto out;

        hooks_stub->op_ctx = dict_copy_with_ref (op_ctx, hooks_stub->op_ctx);
        if (!hooks_stub->op_ctx)
                goto out;

        *stub = hooks_stub;
        ret = 0;
out:
        if (ret) {
                gf_msg (THIS->name, GF_LOG_ERROR, 0,
                        GD_MSG_POST_HOOK_STUB_INIT_FAIL, "Failed to initialize "
                        "post hooks stub");
                glusterd_hooks_stub_cleanup (hooks_stub);
        }

        return ret;
}

void
glusterd_hooks_stub_cleanup (glusterd_hooks_stub_t *stub)
{
        if (!stub) {
                gf_msg_callingfn (THIS->name, GF_LOG_WARNING, 0,
                                  GD_MSG_HOOK_STUB_NULL,
                                  "hooks_stub is NULL");
                return;
        }

        if (stub->op_ctx)
                dict_unref (stub->op_ctx);

        GF_FREE (stub->scriptdir);

        GF_FREE (stub);
}

static void*
hooks_worker (void *args)
{
        glusterd_conf_t *conf = NULL;
        glusterd_hooks_private_t *hooks_priv = NULL;
        glusterd_hooks_stub_t *stub = NULL;

        THIS = args;
        conf = THIS->private;
        hooks_priv = conf->hooks_priv;

        for (;;) {
                pthread_mutex_lock (&hooks_priv->mutex);
                {
                        while (cds_list_empty (&hooks_priv->list)) {
                                pthread_cond_wait (&hooks_priv->cond,
                                                   &hooks_priv->mutex);
                        }
                        stub = cds_list_entry (hooks_priv->list.next,
                                               glusterd_hooks_stub_t,
                                               all_hooks);
                        cds_list_del_init (&stub->all_hooks);
                        hooks_priv->waitcount--;

                }
                pthread_mutex_unlock (&hooks_priv->mutex);

                glusterd_hooks_run_hooks (stub->scriptdir, stub->op,
                                          stub->op_ctx, GD_COMMIT_HOOK_POST);
                glusterd_hooks_stub_cleanup (stub);
        }

        return NULL;
}

int
glusterd_hooks_priv_init (glusterd_hooks_private_t **new)
{
        int                      ret            = -1;
        glusterd_hooks_private_t *hooks_priv    = NULL;

        if (!new)
                goto out;

        hooks_priv = GF_CALLOC (1, sizeof (*hooks_priv),
                                gf_gld_mt_hooks_priv_t);
        if (!hooks_priv)
                goto out;

        pthread_mutex_init (&hooks_priv->mutex, NULL);
        pthread_cond_init (&hooks_priv->cond, NULL);
        CDS_INIT_LIST_HEAD (&hooks_priv->list);
        hooks_priv->waitcount = 0;

        *new = hooks_priv;
        ret = 0;
out:
        return ret;
}

int
glusterd_hooks_spawn_worker (xlator_t *this)
{
        int                       ret          = -1;
        glusterd_conf_t           *conf        = NULL;
        glusterd_hooks_private_t  *hooks_priv  = NULL;


        ret = glusterd_hooks_priv_init (&hooks_priv);
        if (ret)
                goto out;

        conf = this->private;
        conf->hooks_priv = hooks_priv;
        ret = gf_thread_create (&hooks_priv->worker, NULL, hooks_worker,
                                (void *)this, "gdhooks");
        if (ret)
                gf_msg (this->name, GF_LOG_CRITICAL, errno,
                        GD_MSG_SPAWN_THREADS_FAIL, "Failed to spawn post "
                        "hooks worker thread");
out:
        return ret;
}