summaryrefslogtreecommitdiffstats
path: root/libglusterfs/src/compat.c
blob: becfb9deaccdb996c995432b40b1a016ba783cf0 (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
/*
  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 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
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see
  <http://www.gnu.org/licenses/>.
*/

#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif

#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <getopt.h>
#include <sys/types.h>
#include <dirent.h>

#ifdef GF_SOLARIS_HOST_OS
#include "logging.h"
#endif /* GF_SOLARIS_HOST_OS */

#include "compat.h"
#include "common-utils.h"
#include "iatt.h"
#include "inode.h"

#ifdef GF_SOLARIS_HOST_OS
int
solaris_fsetxattr(int fd, const char* key, const char *value, size_t size,
                  int flags)
{
        int attrfd = -1;
        int ret = 0;

        attrfd = openat (fd, key, flags|O_CREAT|O_WRONLY|O_XATTR, 0777);
        if (attrfd >= 0) {
                ftruncate (attrfd, 0);
                ret = write (attrfd, value, size);
                close (attrfd);
        } else {
                if (errno != ENOENT)
                        gf_log ("libglusterfs", GF_LOG_ERROR,
                                "Couldn't set extended attribute for %d (%d)",
                                fd, errno);
                return -1;
        }

        return 0;
}


int
solaris_fgetxattr(int fd, const char* key, char *value, size_t size)
{
        int attrfd = -1;
        int ret = 0;

        attrfd = openat (fd, key, O_RDONLY|O_XATTR);
        if (attrfd >= 0) {
                if (size == 0) {
                        struct stat buf;
                        fstat (attrfd, &buf);
                        ret = buf.st_size;
                } else {
                        ret = read (attrfd, value, size);
                }
                close (attrfd);
        } else {
                if (errno != ENOENT)
                        gf_log ("libglusterfs", GF_LOG_INFO,
                                "Couldn't read extended attribute for the file %d (%d)",
                                fd, errno);
                if (errno == ENOENT)
                        errno = ENODATA;
                return -1;
        }

        return ret;
}

/* Solaris does not support xattr for symlinks and dev files. Since gfid and
   other trusted attributes are stored as xattrs, we need to provide support for
   them. A mapped regular file is stored in the /.glusterfs_xattr_inode of the export dir.
   All xattr ops related to the special files are redirected to this map file.
*/

int
make_export_path (const char *real_path, char **path)
{
        int     ret = -1;
        char   *tmp = NULL;
        char   *export_path = NULL;
        char   *dup = NULL;
        char   *ptr = NULL;
        char   *freeptr = NULL;
        uuid_t  gfid = {0, };

        export_path = GF_CALLOC (1, sizeof (char) * PATH_MAX, 0);
        if (!export_path)
                goto out;

        dup = gf_strdup (real_path);
        if (!dup)
                goto out;

        freeptr = dup;
        ret = solaris_getxattr ("/", GFID_XATTR_KEY, gfid, 16);
        /* Return value of getxattr */
        if (ret == 16) {
                if (!__is_root_gfid (gfid)){
                        strcat (export_path, "/");
                        ret = 0;
                        goto done;
                }
        }

        do {
                ptr = strtok_r (dup, "/", &tmp);
                if (!ptr)
                        break;
                strcat (export_path, dup);
                ret = solaris_getxattr (export_path, GFID_XATTR_KEY, gfid, 16);
                if (ret == 16) {
                        if (!__is_root_gfid (gfid)) {
                                ret = 0;
                                goto done;
                        }
                }
                strcat (export_path, "/");
                dup = tmp;
        } while (ptr);

        goto out;

done:
        if (!ret) {
                *path = export_path;
        }
out:
        if (freeptr)
                GF_FREE (freeptr);
        if (ret && export_path)
                GF_FREE (export_path);

        return ret;
}
int
solaris_xattr_resolve_path (const char *real_path, char **path)
{
        int                    ret  = -1;
        char                   *export_path = NULL;
        char                   xattr_path[PATH_MAX] = {0, };
        struct stat            lstatbuf = {0, };
        struct iatt            stbuf = {0, };
        struct stat            statbuf = {0, };

        ret = lstat (real_path, &lstatbuf);
        if (ret != 0 )
                return ret;
        iatt_from_stat (&stbuf, &lstatbuf);
        if (IA_ISREG(stbuf.ia_type) || IA_ISDIR(stbuf.ia_type))
                return -1;

        ret = make_export_path (real_path, &export_path);
        if (!ret && export_path) {
                strcat (export_path, "/"GF_SOLARIS_XATTR_DIR);
                if (lstat (export_path, &statbuf)) {
                        ret = mkdir (export_path, 0777);
                        if (ret && (errno != EEXIST)) {
                                gf_log (THIS->name, GF_LOG_DEBUG, "mkdir failed,"
                                        " errno: %d", errno);
                                goto out;
                        }
                }

                snprintf(xattr_path, PATH_MAX, "%s%s%lu", export_path,
                         "/", stbuf.ia_ino);

                ret = lstat (xattr_path, &statbuf);

                if (ret) {
                        ret = mknod (xattr_path, S_IFREG|O_WRONLY, 0);
                        if (ret && (errno != EEXIST)) {
                                gf_log (THIS->name, GF_LOG_WARNING,"Failed to create "
                                        "mapped file %s, error %d", xattr_path,
                                        errno);
                                goto out;
                        }
                }
                *path = gf_strdup (xattr_path);
        }
out:
        if (export_path)
                GF_FREE (export_path);
        if (*path)
                return 0;
        else
                return -1;
}

int
solaris_setxattr(const char *path, const char* key, const char *value,
                 size_t size, int flags)
{
        int attrfd = -1;
        int ret = 0;
        char *mapped_path = NULL;

        ret = solaris_xattr_resolve_path (path, &mapped_path);
        if (!ret) {
                attrfd = attropen (mapped_path,  key, flags|O_CREAT|O_WRONLY,
                                   0777);
        } else {
                attrfd = attropen (path, key, flags|O_CREAT|O_WRONLY, 0777);
        }
        if (attrfd >= 0) {
                ftruncate (attrfd, 0);
                ret = write (attrfd, value, size);
                close (attrfd);
                ret = 0;
        } else {
                if (errno != ENOENT)
                        gf_log ("libglusterfs", GF_LOG_ERROR,
                                "Couldn't set extended attribute for %s (%d)",
                                path, errno);
                ret = -1;
        }
        if (mapped_path)
                GF_FREE (mapped_path);
        return ret;
}


int
solaris_listxattr(const char *path, char *list, size_t size)
{
        int attrdirfd = -1;
        ssize_t len = 0;
        DIR *dirptr = NULL;
        struct dirent *dent = NULL;
        int newfd = -1;
        char *mapped_path = NULL;
        int ret = -1;

        ret = solaris_xattr_resolve_path (path, &mapped_path);
        if (!ret) {
                attrdirfd = attropen (mapped_path, ".", O_RDONLY, 0);
        } else {
                attrdirfd = attropen (path, ".", O_RDONLY, 0);
        }
        if (attrdirfd >= 0) {
                newfd = dup(attrdirfd);
                dirptr = fdopendir(newfd);
                if (dirptr) {
                        while ((dent = readdir(dirptr))) {
                                size_t listlen = strlen(dent->d_name);
                                if (!strcmp(dent->d_name, ".") ||
                                    !strcmp(dent->d_name, "..")) {
                                        /* we don't want "." and ".." here */
                                        continue;
                                }
                                if (size == 0) {
                                        /* return the current size of the list
                                           of extended attribute names*/
                                        len += listlen + 1;
                                } else {
                                        /* check size and copy entry + null
                                           into list. */
                                        if ((len + listlen + 1) > size) {
                                                errno = ERANGE;
                                                len = -1;
                                                break;
                                        } else {
                                                strncpy(list + len, dent->d_name, listlen);
                                                len += listlen;
                                                list[len] = '\0';
                                                ++len;
                                        }
                                }
                        }

                        if (closedir(dirptr) == -1) {
                                close (attrdirfd);
                                len = -1;
                                goto out;
                        }
                } else {
                        close (attrdirfd);
                        len = -1;
                        goto out;
                }
                close (attrdirfd);
        }
out:
        if (mapped_path)
                GF_FREE (mapped_path);
        return len;
}


int
solaris_flistxattr(int fd, char *list, size_t size)
{
        int attrdirfd = -1;
        ssize_t len = 0;
        DIR *dirptr = NULL;
        struct dirent *dent = NULL;
        int newfd = -1;

        attrdirfd = openat (fd, ".", O_RDONLY, 0);
        if (attrdirfd >= 0) {
                newfd = dup(attrdirfd);
                dirptr = fdopendir(newfd);
                if (dirptr) {
                        while ((dent = readdir(dirptr))) {
                                size_t listlen = strlen(dent->d_name);
                                if (!strcmp(dent->d_name, ".") ||
                                    !strcmp(dent->d_name, "..")) {
                                        /* we don't want "." and ".." here */
                                        continue;
                                }
                                if (size == 0) {
                                        /* return the current size of the list
                                           of extended attribute names*/
                                        len += listlen + 1;
                                } else {
                                        /* check size and copy entry + null
                                           into list. */
                                        if ((len + listlen + 1) > size) {
                                                errno = ERANGE;
                                                len = -1;
                                                break;
                                        } else {
                                                strncpy(list + len, dent->d_name, listlen);
                                                len += listlen;
                                                list[len] = '\0';
                                                ++len;
                                        }
                                }
                        }

                        if (closedir(dirptr) == -1) {
                                close (attrdirfd);
                                return -1;
                        }
                } else {
                        close (attrdirfd);
                        return -1;
                }
                close (attrdirfd);
        }
        return len;
}


int
solaris_removexattr(const char *path, const char* key)
{
        int ret = -1;
        int attrfd = -1;
        char *mapped_path = NULL;

        ret = solaris_xattr_resolve_path (path, &mapped_path);
        if (!ret) {
                attrfd = attropen (mapped_path, ".", O_RDONLY, 0);
        } else {
                attrfd = attropen (path, ".", O_RDONLY, 0);
        }
        if (attrfd >= 0) {
                ret = unlinkat (attrfd, key, 0);
                close (attrfd);
        } else {
                if (errno == ENOENT)
                        errno = ENODATA;
                ret = -1;
        }

        if (mapped_path)
                GF_FREE (mapped_path);

        return ret;
}

int
solaris_getxattr(const char *path,
                 const char* key,
                 char *value,
                 size_t size)
{
        int attrfd = -1;
        int ret = 0;
        char *mapped_path = NULL;

        ret = solaris_xattr_resolve_path (path, &mapped_path);
        if (!ret) {
                attrfd = attropen (mapped_path, key, O_RDONLY, 0);
        } else {
                attrfd = attropen (path, key, O_RDONLY, 0);
        }

        if (attrfd >= 0) {
                if (size == 0) {
                        struct stat buf;
                        fstat (attrfd, &buf);
                        ret = buf.st_size;
                } else {
                        ret = read (attrfd, value, size);
                }
                close (attrfd);
        } else {
                if (errno != ENOENT)
                        gf_log ("libglusterfs", GF_LOG_INFO,
                                "Couldn't read extended attribute for the file %s (%s)",
                                path, strerror (errno));
                if (errno == ENOENT)
                        errno = ENODATA;
                ret = -1;
        }
        if (mapped_path)
                GF_FREE (mapped_path);
        return ret;
}


char* strsep(char** str, const char* delims)
{
        char* token;

        if (*str==NULL) {
                /* No more tokens */
                return NULL;
        }

        token=*str;
        while (**str!='\0') {
                if (strchr(delims,**str)!=NULL) {
                        **str='\0';
                        (*str)++;
                        return token;
                }
                (*str)++;
        }
        /* There is no other token */
        *str=NULL;
        return token;
}

/* Code comes from libiberty */

int
vasprintf (char **result, const char *format, va_list args)
{
        return gf_vasprintf(result, format, args);
}

int
asprintf (char **buf, const char *fmt, ...)
{
        int status;
        va_list ap;

        va_start (ap, fmt);
        status = vasprintf (buf, fmt, ap);
        va_end (ap);
        return status;
}

int solaris_unlink (const char *path)
{
        char *mapped_path = NULL;
        struct stat     stbuf = {0, };
        int ret = -1;

        ret = solaris_xattr_resolve_path (path, &mapped_path);


        if (!ret && mapped_path) {
                if (lstat(path, &stbuf)) {
                        gf_log (THIS->name, GF_LOG_WARNING, "Stat failed on mapped"
                                " file %s with error %d", mapped_path, errno);
                        goto out;
                }
                if (stbuf.st_nlink == 1) {
                        if(remove (mapped_path))
                                gf_log (THIS->name, GF_LOG_WARNING, "Failed to remove mapped "
                                        "file %s. Errno %d", mapped_path, errno);
                }

        }

out:
        if (mapped_path)
                GF_FREE (mapped_path);

        return  unlink (path);
}

int
solaris_rename (const char *old_path, const char *new_path)
{
        char *mapped_path = NULL;
        int ret = -1;

        ret = solaris_xattr_resolve_path (new_path, &mapped_path);


        if (!ret && mapped_path) {
                if (!remove (mapped_path))
                        gf_log (THIS->name, GF_LOG_WARNING, "Failed to remove mapped "
                                "file %s. Errno %d", mapped_path, errno);
                GF_FREE (mapped_path);
        }

        return rename(old_path, new_path);

}

char *
mkdtemp (char *tempstring)
{
        char *new_string = NULL;
        int   ret        = 0;

        new_string = mkstemp (tempstring);
        if (!new_string)
                goto out;

        ret = mkdir (new_string, 0700);
        if (ret < 0)
                new_string = NULL;

out:
        return new_string;
}

#endif /* GF_SOLARIS_HOST_OS */

#ifndef HAVE_STRNLEN
size_t
strnlen(const char *string, size_t maxlen)
{
        int len = 0;
        while ((len < maxlen) && string[len])
                len++;
        return len;
}
#endif /* STRNLEN */