summaryrefslogtreecommitdiffstats
path: root/xlators/storage/posix/src/posix-metadata.c
blob: 1110435f4e0ec2430633e7423d450fc495b27c97 (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
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
/*
   Copyright (c) 2018 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 "xlator.h"
#include "posix-metadata.h"
#include "posix-metadata-disk.h"
#include "posix-handle.h"
#include "posix-messages.h"
#include "syscall.h"
#include "compat-errno.h"
#include "compat.h"

static int gf_posix_xattr_enotsup_log;

/* posix_mdata_to_disk converts posix_mdata_t into network byte order to
 * save it on disk in machine independant format
 */
static inline void
posix_mdata_to_disk (posix_mdata_disk_t *out, posix_mdata_t *in)
{
        out->version = in->version;
        out->flags   = htobe64(in->flags);

        out->ctime.tv_sec = htobe64(in->ctime.tv_sec);
        out->ctime.tv_nsec = htobe64(in->ctime.tv_nsec);

        out->mtime.tv_sec = htobe64(in->mtime.tv_sec);
        out->mtime.tv_nsec = htobe64(in->mtime.tv_nsec);

        out->atime.tv_sec = htobe64(in->atime.tv_sec);
        out->atime.tv_nsec = htobe64(in->atime.tv_nsec);
}

/* posix_mdata_from_disk converts posix_mdata_disk_t into host byte order
 */
static inline void
posix_mdata_from_disk (posix_mdata_t *out, posix_mdata_disk_t *in)
{
        out->version = in->version;
        out->flags   = be64toh(in->flags);

        out->ctime.tv_sec = be64toh(in->ctime.tv_sec);
        out->ctime.tv_nsec = be64toh(in->ctime.tv_nsec);

        out->mtime.tv_sec = be64toh(in->mtime.tv_sec);
        out->mtime.tv_nsec = be64toh(in->mtime.tv_nsec);

        out->atime.tv_sec = be64toh(in->atime.tv_sec);
        out->atime.tv_nsec = be64toh(in->atime.tv_nsec);
}

/* posix_fetch_mdata_xattr fetches the posix_mdata_t from disk */
static int
posix_fetch_mdata_xattr (xlator_t *this, const char *real_path_arg, int _fd,
                         inode_t *inode, posix_mdata_t *metadata)
{
        size_t               size            = -1;
        int                  op_errno        = 0;
        int                  op_ret          = -1;
        char                *value           = NULL;
        gf_boolean_t         fd_based_fop    = _gf_false;
        char                 gfid_str[64]    = {0};
        char                *real_path       = NULL;

        char *key = GF_XATTR_MDATA_KEY;

        if (!metadata) {
                op_ret = -1;
                goto out;
        }

        if (_fd != -1) {
                fd_based_fop = _gf_true;
        }
        if (!(fd_based_fop || real_path_arg)) {
                MAKE_HANDLE_PATH (real_path, this, inode->gfid, NULL);
                if (!real_path) {
                        uuid_utoa_r (inode->gfid, gfid_str);
                        gf_msg (this->name, GF_LOG_WARNING, op_errno,
                                P_MSG_LSTAT_FAILED, "lstat on gfid %s failed",
                                gfid_str);
                        op_ret = -1;
                        goto out;
                }
        }

        if (fd_based_fop) {
                size = sys_fgetxattr (_fd, key, NULL, 0);
        } else if (real_path_arg) {
                size = sys_lgetxattr (real_path_arg, key, NULL, 0);
        } else if (real_path) {
                size = sys_lgetxattr (real_path, key, NULL, 0);
        }

        if (size == -1) {
                op_errno = errno;
                if ((op_errno == ENOTSUP) || (op_errno == ENOSYS)) {
                        GF_LOG_OCCASIONALLY (gf_posix_xattr_enotsup_log,
                                             this->name, GF_LOG_WARNING,
                                             "Extended attributes not "
                                             "supported (try remounting"
                                             " brick with 'user_xattr' "
                                             "flag)");
                } else if (op_errno == ENOATTR ||
                                op_errno == ENODATA) {
                        gf_msg_debug (this->name, 0,
                                      "No such attribute:%s for file %s "
                                      "gfid: %s",
                                      key, real_path ? real_path : (real_path_arg ? real_path_arg : "null"),
                                      uuid_utoa(inode->gfid));
                } else {
                        gf_msg (this->name, GF_LOG_DEBUG, op_errno,
                                P_MSG_XATTR_FAILED, "getxattr failed"
                                " on %s gfid: %s key: %s ",
                                real_path ? real_path : (real_path_arg ? real_path_arg : "null"),
                                uuid_utoa(inode->gfid), key);
                }
                op_ret = -1;
                goto out;
        }

        value = GF_CALLOC (size + 1, sizeof(char), gf_posix_mt_char);
        if (!value) {
                op_ret = -1;
                op_errno = ENOMEM;
                goto out;
        }

        if (fd_based_fop) {
                size = sys_fgetxattr (_fd, key, value, size);
        } else if (real_path_arg) {
                size = sys_lgetxattr (real_path_arg, key, value, size);
        } else if (real_path) {
                size = sys_lgetxattr (real_path, key, value, size);
        }
        if (size == -1) {
                op_ret = -1;
                op_errno = errno;
                gf_msg (this->name, GF_LOG_ERROR, errno,
                        P_MSG_XATTR_FAILED, "getxattr failed on "
                        " on %s gfid: %s key: %s ",
                        real_path ? real_path : (real_path_arg ? real_path_arg : "null"),
                        uuid_utoa(inode->gfid), key);
                goto out;
        }

        posix_mdata_from_disk (metadata, (posix_mdata_disk_t*)value);

        op_ret = 0;
out:
        GF_FREE (value);
        return op_ret;
}

/* posix_store_mdata_xattr stores the posix_mdata_t on disk */
static int
posix_store_mdata_xattr (xlator_t *this, const char *real_path_arg, int fd,
                         inode_t *inode, posix_mdata_t *metadata)
{
        char                *real_path       = NULL;
        int                  op_ret          = 0;
        gf_boolean_t         fd_based_fop    = _gf_false;
        char                *key             = GF_XATTR_MDATA_KEY;
        char                 gfid_str[64]    = {0};
        posix_mdata_disk_t   disk_metadata;

        if (!metadata) {
                op_ret = -1;
                goto out;
        }

        if (fd != -1) {
                fd_based_fop = _gf_true;
        }
        if (!(fd_based_fop || real_path_arg)) {
                MAKE_HANDLE_PATH (real_path, this, inode->gfid, NULL);
                if (!real_path) {
                        uuid_utoa_r (inode->gfid, gfid_str);
                        gf_msg (this->name, GF_LOG_DEBUG, errno,
                                P_MSG_LSTAT_FAILED, "lstat on gfid %s failed",
                                gfid_str);
                        op_ret = -1;
                        goto out;
                }
        }

        /* Set default version as 1 */
        posix_mdata_to_disk (&disk_metadata, metadata);

        if (fd_based_fop) {
                op_ret = sys_fsetxattr (fd, key,
                                        (void *) &disk_metadata,
                                        sizeof (posix_mdata_disk_t), 0);
        } else if (real_path_arg) {
                op_ret = sys_lsetxattr (real_path_arg, key,
                                        (void *) &disk_metadata,
                                        sizeof (posix_mdata_disk_t), 0);
        } else if (real_path) {
                op_ret = sys_lsetxattr (real_path, key,
                                        (void *) &disk_metadata,
                                        sizeof (posix_mdata_disk_t), 0);
        }

#ifdef GF_DARWIN_HOST_OS
        if (real_path_arg) {
                posix_dump_buffer(this, real_path_arg, key, value, 0);
        } else if (real_path) {
                posix_dump_buffer(this, real_path, key, value, 0);
        }
#endif
out:
        if (op_ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, errno, P_MSG_XATTR_FAILED,
                        "file: %s: gfid: %s key:%s ",
                        real_path ? real_path : (real_path_arg ? real_path_arg : "null"),
                        uuid_utoa(inode->gfid), key);
       }
       return op_ret;
}

/* _posix_get_mdata_xattr gets posix_mdata_t from inode context. If it fails
 * to get it from inode context, gets it from disk. This is with out inode lock.
 */
int
__posix_get_mdata_xattr (xlator_t *this, const char *real_path, int _fd,
                         inode_t *inode, struct iatt *stbuf)
{
        posix_mdata_t  *mdata       = NULL;
        int             ret         = -1;

        GF_VALIDATE_OR_GOTO (this->name, inode, out);

        ret = __inode_ctx_get1 (inode, this,
                                (uint64_t *)&mdata);
        if (ret == -1 || !mdata) {
                mdata = GF_CALLOC (1, sizeof (posix_mdata_t),
                                   gf_posix_mt_mdata_attr);
                if (!mdata) {
                        ret = -1;
                        goto out;
                }

                ret = posix_fetch_mdata_xattr (this, real_path, _fd, inode,
                                               mdata);

                if (ret == 0) {
                        /* Got mdata from disk, set it in inode ctx. This case
                         * is hit when in-memory status is lost due to brick
                         * down scenario
                         */
                        __inode_ctx_set1 (inode, this, (uint64_t *)&mdata);
                } else {
                        /* Failed to get mdata from disk, xattr missing
                         * Even new file creation hits here first as posix_pstat
                         * is generally done before posix_set_ctime
                         */
                       if (stbuf) {
                               mdata->version = 1;
                               mdata->flags = 0;
                               mdata->ctime.tv_sec = stbuf->ia_ctime;
                               mdata->ctime.tv_nsec = stbuf->ia_ctime_nsec;
                               mdata->mtime.tv_sec = stbuf->ia_mtime;
                               mdata->mtime.tv_nsec = stbuf->ia_mtime_nsec;
                               mdata->atime.tv_sec = stbuf->ia_atime;
                               mdata->atime.tv_nsec = stbuf->ia_atime_nsec;
                               ret = posix_store_mdata_xattr (this, real_path,
                                                              _fd, inode,
                                                              mdata);
                               if (ret) {
                                       gf_msg (this->name, GF_LOG_ERROR, errno,
                                               P_MSG_STOREMDATA_FAILED,
                                               "file: %s: gfid: %s key:%s ",
                                               real_path ? real_path : "null",
                                               uuid_utoa(inode->gfid),
                                               GF_XATTR_MDATA_KEY);
                                       goto out;
                               }
                               __inode_ctx_set1 (inode, this, (uint64_t *)&mdata);
                       } else {
                              /* This case should not be hit. If it hits, don't
                               * fail, log warning, free mdata and move on
                               */
                               gf_msg (this->name, GF_LOG_WARNING, errno,
                                       P_MSG_FETCHMDATA_FAILED,
                                       "file: %s: gfid: %s key:%s ",
                                       real_path ? real_path : "null",
                                       uuid_utoa(inode->gfid),
                                       GF_XATTR_MDATA_KEY);
                               GF_FREE (mdata);
                               ret = 0;
                               goto out;
                       }
                }
        }

        ret = 0;

        if (ret == 0 && stbuf) {
                stbuf->ia_ctime = mdata->ctime.tv_sec;
                stbuf->ia_ctime_nsec = mdata->ctime.tv_nsec;
                stbuf->ia_mtime = mdata->mtime.tv_sec;
                stbuf->ia_mtime_nsec = mdata->mtime.tv_nsec;
                stbuf->ia_atime = mdata->atime.tv_sec;
                stbuf->ia_atime_nsec = mdata->atime.tv_nsec;
        }

out:
        return ret;
}

/* posix_get_mdata_xattr gets posix_mdata_t from inode context. If it fails
 * to get it from inode context, gets it from disk. This is with inode lock.
 */
int
posix_get_mdata_xattr (xlator_t *this, const char *real_path, int _fd,
                       inode_t *inode, struct iatt *stbuf)
{
        int             ret         = -1;

        GF_VALIDATE_OR_GOTO (this->name, inode, out);

        LOCK (&inode->lock);
        {
                ret = __posix_get_mdata_xattr (this, real_path, _fd, inode, stbuf);
        }
        UNLOCK (&inode->lock);

out:
        return ret;
}

static int
posix_compare_timespec (struct timespec *first, struct timespec *second)
{
        if (first->tv_sec == second->tv_sec)
                return first->tv_nsec - second->tv_nsec;
        else
                return first->tv_sec - second->tv_sec;
}

/* posix_set_mdata_xattr updates the posix_mdata_t based on the flag
 * in inode context and stores it on disk
 */
static int
posix_set_mdata_xattr (xlator_t *this, const char *real_path, int fd,
                       inode_t *inode, struct timespec *time,
                       struct iatt *stbuf, posix_mdata_flag_t *flag)
{
        posix_mdata_t  *mdata       = NULL;
        int             ret         = -1;

        GF_VALIDATE_OR_GOTO ("posix", this, out);
        GF_VALIDATE_OR_GOTO (this->name, inode, out);

        LOCK (&inode->lock);
        {
                ret = __inode_ctx_get1 (inode, this,
                                        (uint64_t *)&mdata);
                if (ret == -1 || !mdata) {
                        /*
                         * Do we need to fetch the data from xattr
                         * If we does we can compare the value and store
                         * the largest data in inode ctx.
                         */
                        mdata = GF_CALLOC (1, sizeof (posix_mdata_t),
                                           gf_posix_mt_mdata_attr);
                        if (!mdata) {
                                ret = -1;
                                goto unlock;
                        }

                        ret = posix_fetch_mdata_xattr (this, real_path, fd,
                                                       inode,
                                                       (void *)mdata);
                        if (ret == 0) {
                                /* Got mdata from disk, set it in inode ctx. This case
                                 * is hit when in-memory status is lost due to brick
                                 * down scenario
                                 */
                                __inode_ctx_set1 (inode, this,
                                                  (uint64_t *)&mdata);
                        } else if (ret && stbuf) {
                                /*
                                 * This is the first time creating the time
                                 * attr. This happens when you activate this
                                 * feature, and the legacy file will not have
                                 * any xattr set.
                                 *
                                 * New files will create extended attributes.
                                 */

                                /*
                                 * TODO: This is wrong approach, because before
                                 * creating fresh xattr, we should consult
                                 * to all replica and/or distribution set.
                                 *
                                 * We should contact the time management
                                 * xlators, and ask them to create an xattr.
                                 */
                                mdata->version = 1;
                                mdata->flags = 0;
                                mdata->ctime.tv_sec = stbuf->ia_ctime;
                                mdata->ctime.tv_nsec = stbuf->ia_ctime_nsec;
                                mdata->atime.tv_sec = stbuf->ia_atime;
                                mdata->atime.tv_nsec = stbuf->ia_atime_nsec;
                                mdata->mtime.tv_sec = stbuf->ia_mtime;
                                mdata->mtime.tv_nsec = stbuf->ia_mtime_nsec;

                                __inode_ctx_set1 (inode, this,
                                                  (uint64_t *)&mdata);
                        }
                }
                if (flag->ctime &&
                    posix_compare_timespec (time, &mdata->ctime) > 0) {
                        mdata->ctime = *time;
                }
                if (flag->mtime &&
                    posix_compare_timespec (time, &mdata->mtime) > 0) {
                        mdata->mtime = *time;
                }
                if (flag->atime &&
                    posix_compare_timespec (time, &mdata->atime) > 0) {
                        mdata->atime = *time;
                }

                if (inode->ia_type == IA_INVAL) {
                        /*
                         * TODO: This is non-linked inode. So we have to sync the
                         * data into backend. Because inode_link may return
                         * a different inode.
                         */
                        /*  ret = posix_store_mdata_xattr (this, loc, fd,
                         *                                 mdata); */
                }
                /*
                 * With this patch set, we are setting the xattr for each update
                 * We should evaluate the performance, and based on that we can
                 * decide on asynchronous updation.
                 */
                ret = posix_store_mdata_xattr (this, real_path, fd, inode,
                                               mdata);
                if (ret) {
                        gf_msg (this->name, GF_LOG_ERROR, errno,
                                P_MSG_STOREMDATA_FAILED,
                                "file: %s: gfid: %s key:%s ",
                                real_path ? real_path : "null",
                                uuid_utoa(inode->gfid), GF_XATTR_MDATA_KEY);
                                goto out;
                }
        }
unlock:
        UNLOCK (&inode->lock);
out:
        if (ret == 0 && stbuf) {
                stbuf->ia_ctime = mdata->ctime.tv_sec;
                stbuf->ia_ctime_nsec = mdata->ctime.tv_nsec;
                stbuf->ia_mtime = mdata->mtime.tv_sec;
                stbuf->ia_mtime_nsec = mdata->mtime.tv_nsec;
                stbuf->ia_atime = mdata->atime.tv_sec;
                stbuf->ia_atime_nsec = mdata->atime.tv_nsec;
        }

        return ret;
}

/* posix_update_utime_in_mdata updates the posix_mdata_t when mtime/atime
 * is modified using syscall
 */
void
posix_update_utime_in_mdata (xlator_t *this, const char *real_path, int fd,
                             inode_t *inode,
                             struct iatt *stbuf, int valid)
{
        int32_t ret = 0;
#if defined(HAVE_UTIMENSAT)
        struct timespec tv    = {0, };
#else
        struct timeval tv     = {0, };
#endif
        posix_mdata_flag_t       flag            = {0, };

        struct posix_private *priv = NULL;

        priv = this->private;

        if (inode && priv->ctime) {
                if ((valid & GF_SET_ATTR_ATIME) == GF_SET_ATTR_ATIME) {
                        tv.tv_sec  = stbuf->ia_atime;
                        SET_TIMESPEC_NSEC_OR_TIMEVAL_USEC(tv, stbuf->ia_atime_nsec);

                        flag.ctime = 0;
                        flag.mtime = 0;
                        flag.atime = 1;
                        ret = posix_set_mdata_xattr (this, real_path, -1, inode, &tv, NULL,
                                                     &flag);
                        if (ret) {
                                gf_msg (this->name, GF_LOG_WARNING, errno,
                                        P_MSG_SETMDATA_FAILED,
                                        "posix set mdata atime failed on file:"
                                        " %s gfid:%s",
                                        real_path, uuid_utoa (inode->gfid));
                        }
                }

                if ((valid & GF_SET_ATTR_MTIME) == GF_SET_ATTR_MTIME) {
                        tv.tv_sec  = stbuf->ia_mtime;
                        SET_TIMESPEC_NSEC_OR_TIMEVAL_USEC(tv, stbuf->ia_mtime_nsec);

                        flag.ctime = 1;
                        flag.mtime = 1;
                        flag.atime = 0;

                        ret = posix_set_mdata_xattr (this, real_path, -1, inode, &tv, NULL,
                                                     &flag);
                        if (ret) {
                                gf_msg (this->name, GF_LOG_WARNING, errno,
                                        P_MSG_SETMDATA_FAILED,
                                        "posix set mdata mtime failed on file:"
                                        " %s gfid:%s",
                                        real_path, uuid_utoa (inode->gfid));
                        }
                }

        } else {
                gf_msg (this->name, GF_LOG_WARNING, errno,
                        P_MSG_SETMDATA_FAILED,
                        "posix utime set mdata failed on file");
        }
        return;
}

static void
posix_get_mdata_flag (uint64_t flags, posix_mdata_flag_t *flag)
{
        if (!flag)
                return;

        flag->ctime = 0;
        flag->atime = 0;
        flag->mtime = 0;

        if (flags & MDATA_CTIME)
                flag->ctime = 1;
        if (flags & MDATA_MTIME)
                flag->mtime = 1;
        if (flags & MDATA_ATIME)
                flag->atime = 1;
}

static void
posix_get_parent_mdata_flag (uint64_t flags, posix_mdata_flag_t *flag)
{
        if (!flag)
                return;

        flag->ctime = 0;
        flag->atime = 0;
        flag->mtime = 0;

        if (flags & MDATA_PAR_CTIME)
                flag->ctime = 1;
        if (flags & MDATA_PAR_MTIME)
                flag->mtime = 1;
        if (flags & MDATA_PAR_ATIME)
                flag->atime = 1;
}

void
posix_set_ctime (call_frame_t *frame, xlator_t *this, const char* real_path,
                 int fd, inode_t *inode, struct iatt *stbuf)
{
        posix_mdata_flag_t    flag            = {0,};
        int                   ret             = 0;
        struct posix_private *priv            = NULL;

        priv = this->private;

        if (priv->ctime) {
                (void) posix_get_mdata_flag (frame->root->flags, &flag);
                if (frame->root->ctime.tv_sec == 0) {
                        gf_msg (this->name, GF_LOG_WARNING, errno,
                                P_MSG_SETMDATA_FAILED,
                                "posix set mdata failed, No ctime : %s gfid:%s",
                                real_path,
                                inode ? uuid_utoa (inode->gfid) : "No inode");
                        goto out;
                }

                ret = posix_set_mdata_xattr (this, real_path, fd, inode,
                                             &frame->root->ctime, stbuf, &flag);
                if (ret) {
                        gf_msg (this->name, GF_LOG_WARNING, errno,
                                P_MSG_SETMDATA_FAILED,
                                "posix set mdata failed on file: %s gfid:%s",
                                real_path,
                                inode ? uuid_utoa (inode->gfid) : "No inode");
                }
        }
 out:
        return;
}

void
posix_set_parent_ctime (call_frame_t *frame, xlator_t *this,
                        const char* real_path, int fd, inode_t *inode,
                        struct iatt *stbuf)
{
        posix_mdata_flag_t    flag            = {0,};
        int                   ret             = 0;
        struct posix_private *priv            = NULL;

        priv = this->private;

        if (inode && priv->ctime) {
                (void) posix_get_parent_mdata_flag (frame->root->flags, &flag);
                ret = posix_set_mdata_xattr (this, real_path, fd, inode,
                                             &frame->root->ctime, stbuf, &flag);
                if (ret) {
                        gf_msg (this->name, GF_LOG_WARNING, errno,
                                P_MSG_SETMDATA_FAILED,
                                "posix set mdata failed on file: %s gfid:%s",
                                real_path, uuid_utoa (inode->gfid));
                }
        } else {
                gf_msg (this->name, GF_LOG_WARNING, errno,
                        P_MSG_SETMDATA_FAILED,
                        "posix parent set mdata failed on file");
        }
        return;
}