summaryrefslogtreecommitdiffstats
path: root/xlators/cluster/stripe/src/stripe-helpers.c
blob: 8053f871a0d387c656802fe1fbb937c40efbab8a (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
/*
  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.
*/

#include <fnmatch.h>

#include "stripe.h"
#include "byte-order.h"

void
stripe_local_wipe (stripe_local_t *local)
{
        if (!local)
                goto out;

        loc_wipe (&local->loc);
        loc_wipe (&local->loc2);

        if (local->fd)
                fd_unref (local->fd);

        if (local->inode)
                inode_unref (local->inode);

        if (local->xattr)
                dict_unref (local->xattr);

        if (local->xdata)
                dict_unref (local->xdata);

out:
        return;
}



void
stripe_aggregate (dict_t *this, char *key, data_t *value, void *data)
{
        dict_t  *dst  = NULL;
        int64_t *ptr  = 0, *size = NULL;
        int32_t  ret  = -1;

        dst = data;

        if (strcmp (key, GF_XATTR_QUOTA_SIZE_KEY) == 0) {
                ret = dict_get_bin (dst, key, (void **)&size);
                if (ret < 0) {
                        size = GF_CALLOC (1, sizeof (int64_t),
                                          gf_common_mt_char);
                        if (size == NULL) {
                                gf_log ("stripe", GF_LOG_WARNING,
                                        "memory allocation failed");
                                goto out;
                        }
                        ret = dict_set_bin (dst, key, size, sizeof (int64_t));
                        if (ret < 0) {
                                gf_log ("stripe", GF_LOG_WARNING,
                                        "stripe aggregate dict set failed");
                                GF_FREE (size);
                                goto out;
                        }
                }

                ptr = data_to_bin (value);
                if (ptr == NULL) {
                        gf_log ("stripe", GF_LOG_WARNING, "data to bin failed");
                        goto out;
                }

                *size = hton64 (ntoh64 (*size) + ntoh64 (*ptr));
        } else if (strcmp (key, GF_CONTENT_KEY)) {
                /* No need to aggregate 'CONTENT' data */
                ret = dict_set (dst, key, value);
                if (ret)
                        gf_log ("stripe", GF_LOG_WARNING, "xattr dict set failed");
        }

out:
        return;
}


void
stripe_aggregate_xattr (dict_t *dst, dict_t *src)
{
        if ((dst == NULL) || (src == NULL)) {
                goto out;
        }

        dict_foreach (src, stripe_aggregate, dst);
out:
        return;
}


int32_t
stripe_xattr_aggregate (char *buffer, stripe_local_t *local, int32_t *total)
{
        int32_t              i     = 0;
        int32_t              ret   = -1;
        int32_t              len   = 0;
        char                *sbuf  = NULL;
        stripe_xattr_sort_t *xattr = NULL;

        if (!buffer || !local || !local->xattr_list)
                goto out;

        sbuf = buffer;

        for (i = 0; i < local->nallocs; i++) {
                xattr = local->xattr_list + i;
                len = xattr->xattr_len;

                if (len && xattr && xattr->xattr_value) {
                        memcpy (buffer, xattr->xattr_value, len);
                        buffer += len;
                        *buffer++ = ' ';
                }
        }

        *--buffer = '\0';
        if (total)
                *total = buffer - sbuf;
        ret = 0;

 out:
        return ret;
}

int32_t
stripe_free_xattr_str (stripe_local_t *local)
{
        int32_t              i     = 0;
        int32_t              ret   = -1;
        stripe_xattr_sort_t *xattr = NULL;

        if (!local || !local->xattr_list)
                goto out;

        for (i = 0; i < local->nallocs; i++) {
                xattr = local->xattr_list + i;

                if (xattr && xattr->xattr_value)
                        GF_FREE (xattr->xattr_value);
        }

        ret = 0;
 out:
        return ret;
}


int32_t
stripe_fill_pathinfo_xattr (xlator_t *this, stripe_local_t *local,
                            char **xattr_serz)
{
        int      ret             = -1;
        int32_t  padding         = 0;
        int32_t  tlen            = 0;
        char stripe_size_str[20] = {0,};
        char    *pathinfo_serz   = NULL;

        if (!local) {
                gf_log (this->name, GF_LOG_ERROR, "Possible NULL deref");
                goto out;
        }

        (void) snprintf (stripe_size_str, 20, "%ld",
                         (local->fctx) ? local->fctx->stripe_size : 0);

        /* extra bytes for decorations (brackets and <>'s) */
        padding = strlen (this->name) + strlen (STRIPE_PATHINFO_HEADER)
                + strlen (stripe_size_str) + 7;
        local->xattr_total_len += (padding + 2);

        pathinfo_serz = GF_CALLOC (local->xattr_total_len, sizeof (char),
                                   gf_common_mt_char);
        if (!pathinfo_serz)
                goto out;

        /* xlator info */
        (void) sprintf (pathinfo_serz, "(<"STRIPE_PATHINFO_HEADER"%s:[%s]> ",
                        this->name, stripe_size_str);

        ret = stripe_xattr_aggregate (pathinfo_serz + padding, local, &tlen);
        if (ret) {
                gf_log (this->name, GF_LOG_ERROR,
                        "Cannot aggregate pathinfo list");
                goto out;
        }

        *(pathinfo_serz + padding + tlen) = ')';
        *(pathinfo_serz + padding + tlen + 1) = '\0';

        *xattr_serz = pathinfo_serz;

        ret = 0;
 out:
        return ret;
}

/**
 * stripe_get_matching_bs - Get the matching block size for the given path.
 */
int32_t
stripe_get_matching_bs (const char *path, stripe_private_t *priv)
{
        struct stripe_options *trav       = NULL;
        uint64_t               block_size = 0;

        GF_VALIDATE_OR_GOTO ("stripe", priv, out);
        GF_VALIDATE_OR_GOTO ("stripe", path, out);

        LOCK (&priv->lock);
        {
                block_size = priv->block_size;
                trav = priv->pattern;
                while (trav) {
                        if (!fnmatch (trav->path_pattern, path, FNM_NOESCAPE)) {
                                block_size = trav->block_size;
                                break;
                        }
                        trav = trav->next;
                }
        }
        UNLOCK (&priv->lock);

out:
        return block_size;
}

int32_t
stripe_ctx_handle (xlator_t *this, call_frame_t *prev, stripe_local_t *local,
                   dict_t *dict)
{
        char            key[256]       = {0,};
        data_t         *data            = NULL;
        int32_t         index           = 0;
        stripe_private_t *priv          = NULL;

        priv = this->private;


        if (!local->fctx) {
                local->fctx =  GF_CALLOC (1, sizeof (stripe_fd_ctx_t),
                                         gf_stripe_mt_stripe_fd_ctx_t);
                if (!local->fctx) {
                        local->op_errno = ENOMEM;
                        local->op_ret = -1;
                        goto out;
                }

                local->fctx->static_array = 0;
        }
        /* Stripe block size */
        sprintf (key, "trusted.%s.stripe-size", this->name);
        data = dict_get (dict, key);
        if (!data) {
                local->xattr_self_heal_needed = 1;
                gf_log (this->name, GF_LOG_ERROR,
                        "Failed to get stripe-size");
                goto out;
        } else {
                if (!local->fctx->stripe_size) {
                        local->fctx->stripe_size =
                                     data_to_int64 (data);
                }

                if (local->fctx->stripe_size != data_to_int64 (data)) {
                        gf_log (this->name, GF_LOG_WARNING,
                                "stripe-size mismatch in blocks");
                        local->xattr_self_heal_needed = 1;
                }
        }

        /* Stripe count */
        sprintf (key, "trusted.%s.stripe-count", this->name);
        data = dict_get (dict, key);

        if (!data) {
                local->xattr_self_heal_needed = 1;
                gf_log (this->name, GF_LOG_ERROR,
                        "Failed to get stripe-count");
                goto out;
        }
        if (!local->fctx->xl_array) {
                local->fctx->stripe_count = data_to_int32 (data);
                if (!local->fctx->stripe_count) {
                        gf_log (this->name, GF_LOG_ERROR,
                                "error with stripe-count xattr");
                        local->op_ret   = -1;
                        local->op_errno = EIO;
                        goto out;
                }

                local->fctx->xl_array = GF_CALLOC (local->fctx->stripe_count,
                                                   sizeof (xlator_t *),
                                                   gf_stripe_mt_xlator_t);

                if (!local->fctx->xl_array) {
                        local->op_errno = ENOMEM;
                        local->op_ret   = -1;
                        goto out;
                }
        }
        if (local->fctx->stripe_count != data_to_int32 (data)) {
                gf_log (this->name, GF_LOG_ERROR,
                        "error with stripe-count xattr (%d != %d)",
                        local->fctx->stripe_count, data_to_int32 (data));
                local->op_ret   = -1;
                local->op_errno = EIO;
                goto out;
        }

        /* index */
        sprintf (key, "trusted.%s.stripe-index", this->name);
        data = dict_get (dict, key);
        if (!data) {
                local->xattr_self_heal_needed = 1;
                gf_log (this->name, GF_LOG_ERROR,
                        "Failed to get stripe-index");
                goto out;
        }
        index = data_to_int32 (data);
        if (index > priv->child_count) {
                gf_log (this->name, GF_LOG_ERROR,
                        "error with stripe-index xattr (%d)", index);
                local->op_ret   = -1;
                local->op_errno = EIO;
                goto out;
        }
        if (local->fctx->xl_array) {
                if (!local->fctx->xl_array[index])
                        local->fctx->xl_array[index] = prev->this;
        }

	sprintf(key, "trusted.%s.stripe-coalesce", this->name);
	data = dict_get(dict, key);
	if (!data) {
		/*
		 * The file was probably created prior to coalesce support.
		 * Assume non-coalesce mode for this file to maintain backwards
		 * compatibility.
		 */
		gf_log(this->name, GF_LOG_DEBUG, "missing stripe-coalesce "
			"attr, assume non-coalesce mode");
		local->fctx->stripe_coalesce = 0;
	} else {
		local->fctx->stripe_coalesce = data_to_int32(data);
	}


out:
        return 0;
}

int32_t
stripe_xattr_request_build (xlator_t *this, dict_t *dict, uint64_t stripe_size,
                            uint32_t stripe_count, uint32_t stripe_index,
			    uint32_t stripe_coalesce)
{
        char            key[256]       = {0,};
        int32_t         ret             = -1;

        sprintf (key, "trusted.%s.stripe-size", this->name);
        ret = dict_set_int64 (dict, key, stripe_size);
        if (ret) {
                gf_log (this->name, GF_LOG_WARNING,
                        "failed to set %s in xattr_req dict", key);
                goto out;
        }

        sprintf (key, "trusted.%s.stripe-count", this->name);
        ret = dict_set_int32 (dict, key, stripe_count);
        if (ret) {
                gf_log (this->name, GF_LOG_WARNING,
                        "failed to set %s in xattr_req dict", key);
                goto out;
        }

        sprintf (key, "trusted.%s.stripe-index", this->name);
        ret = dict_set_int32 (dict, key, stripe_index);
        if (ret) {
                gf_log (this->name, GF_LOG_WARNING,
                        "failed to set %s in xattr_req dict", key);
                goto out;
        }

	sprintf(key, "trusted.%s.stripe-coalesce", this->name);
	ret = dict_set_int32(dict, key, stripe_coalesce);
	if (ret) {
		gf_log(this->name, GF_LOG_WARNING,
			"failed to set %s in xattr_req_dict", key);
		goto out;
	}
out:
        return ret;
}


static int
set_default_block_size (stripe_private_t *priv, char *num)
{

        int             ret = -1;
        GF_VALIDATE_OR_GOTO ("stripe", THIS, out);
        GF_VALIDATE_OR_GOTO (THIS->name, priv, out);
        GF_VALIDATE_OR_GOTO (THIS->name, num, out);


        if (gf_string2bytesize (num, &priv->block_size) != 0) {
                gf_log (THIS->name, GF_LOG_ERROR,
                        "invalid number format \"%s\"", num);
                goto out;
        }

        ret = 0;

 out:
        return ret;

}


int
set_stripe_block_size (xlator_t *this, stripe_private_t *priv, char *data)
{
        int                    ret = -1;
        char                  *tmp_str = NULL;
        char                  *tmp_str1 = NULL;
        char                  *dup_str = NULL;
        char                  *stripe_str = NULL;
        char                  *pattern = NULL;
        char                  *num = NULL;
        struct stripe_options *temp_stripeopt = NULL;
        struct stripe_options *stripe_opt = NULL;

        if (!this || !priv || !data)
                goto out;

        /* Get the pattern for striping.
           "option block-size *avi:10MB" etc */
        stripe_str = strtok_r (data, ",", &tmp_str);
        while (stripe_str) {
                dup_str = gf_strdup (stripe_str);
                stripe_opt = GF_CALLOC (1, sizeof (struct stripe_options),
                                        gf_stripe_mt_stripe_options);
                if (!stripe_opt) {
                        goto out;
                }

                pattern = strtok_r (dup_str, ":", &tmp_str1);
                num = strtok_r (NULL, ":", &tmp_str1);
                if (!num) {
                        num = pattern;
                        pattern = "*";
                        ret = set_default_block_size (priv, num);
                        if (ret)
                                goto out;
                }
                if (gf_string2bytesize (num, &stripe_opt->block_size) != 0) {
                        gf_log (this->name, GF_LOG_ERROR,
                                "invalid number format \"%s\"", num);
                        goto out;
                }

                if (stripe_opt->block_size < STRIPE_MIN_BLOCK_SIZE) {
                        gf_log (this->name, GF_LOG_ERROR, "Invalid Block-size: "
                                "%s. Should be atleast %llu bytes", num,
                                STRIPE_MIN_BLOCK_SIZE);
                        goto out;
                }
                if (stripe_opt->block_size % 512) {
                        gf_log (this->name, GF_LOG_ERROR, "Block-size: %s should"
                                " be a multiple of 512 bytes", num);
                        goto out;
                }

                memcpy (stripe_opt->path_pattern, pattern, strlen (pattern));

                gf_log (this->name, GF_LOG_DEBUG,
                        "block-size : pattern %s : size %"PRId64,
                        stripe_opt->path_pattern, stripe_opt->block_size);

                if (priv->pattern)
                        temp_stripeopt = NULL;
                else
                        temp_stripeopt = priv->pattern;

                stripe_opt->next = temp_stripeopt;

                priv->pattern = stripe_opt;
                stripe_opt = NULL;

                GF_FREE (dup_str);
                dup_str = NULL;

                stripe_str = strtok_r (NULL, ",", &tmp_str);
        }

        ret = 0;
out:

        GF_FREE (dup_str);

        GF_FREE (stripe_opt);

        return ret;
}

int32_t
stripe_iatt_merge (struct iatt *from, struct iatt *to)
{
        if (to->ia_size < from->ia_size)
                to->ia_size = from->ia_size;
        if (to->ia_mtime < from->ia_mtime)
                to->ia_mtime = from->ia_mtime;
        if (to->ia_ctime < from->ia_ctime)
                to->ia_ctime = from->ia_ctime;
        if (to->ia_atime < from->ia_atime)
                to->ia_atime = from->ia_atime;
        return 0;
}

off_t
coalesced_offset(off_t offset, uint64_t stripe_size, int stripe_count)
{
	size_t line_size = 0;
	uint64_t stripe_num = 0;
	off_t coalesced_offset = 0;

	line_size = stripe_size * stripe_count;
	stripe_num = offset / line_size;

	coalesced_offset = (stripe_num * stripe_size) +
		(offset % stripe_size);

	return coalesced_offset;
}

off_t
uncoalesced_size(off_t size, uint64_t stripe_size, int stripe_count,
		int stripe_index)
{
        uint64_t nr_full_stripe_chunks = 0, mod = 0;

        if (!size)
                return size;

	/*
	 * Estimate the number of fully written stripes from the
	 * local file size. Each stripe_size chunk corresponds to
	 * a stripe.
	 */
        nr_full_stripe_chunks = (size / stripe_size) * stripe_count;
        mod = size % stripe_size;

        if (!mod) {
                /*
		 * There is no remainder, thus we could have overestimated
		 * the size of the file in terms of chunks. Trim the number
		 * of chunks by the following stripe members and leave it
		 * up to those nodes to respond with a larger size (if
		 * necessary).
		 */
                nr_full_stripe_chunks -= stripe_count -
                        (stripe_index + 1);
                size = nr_full_stripe_chunks * stripe_size;
        } else {
		/*
		 * There is a remainder and thus we own the last chunk of the
		 * file. Add the preceding stripe members of the final stripe
		 * along with the remainder to calculate the exact size.
		 */
                nr_full_stripe_chunks += stripe_index;
                size = nr_full_stripe_chunks * stripe_size + mod;
        }

        return size;
}