Commit | Line | Data |
---|---|---|
16edf865 WD |
1 | /* |
2 | * Extended Attribute support for rsync. | |
3 | * Written by Jay Fenlason, vaguely based on the ACLs patch. | |
4 | * | |
5 | * Copyright (C) 2004 Red Hat, Inc. | |
b3bf9b9d | 6 | * Copyright (C) 2006-2009 Wayne Davison |
16edf865 WD |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
8e41b68e WD |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 3 of the License, or | |
11 | * (at your option) any later version. | |
16edf865 WD |
12 | * |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
4fd842f9 | 19 | * with this program; if not, visit the http://fsf.org website. |
16edf865 WD |
20 | */ |
21 | ||
22 | #include "rsync.h" | |
1b42f628 | 23 | #include "ifuncs.h" |
5dd14f0c | 24 | #include "inums.h" |
16edf865 WD |
25 | #include "lib/sysxattrs.h" |
26 | ||
27 | #ifdef SUPPORT_XATTRS | |
28 | ||
29 | extern int dry_run; | |
30 | extern int am_root; | |
31 | extern int am_sender; | |
32 | extern int am_generator; | |
33 | extern int read_only; | |
34 | extern int list_only; | |
524eaa82 | 35 | extern int preserve_xattrs; |
16edf865 WD |
36 | extern int checksum_seed; |
37 | ||
38 | #define RSYNC_XAL_INITIAL 5 | |
39 | #define RSYNC_XAL_LIST_INITIAL 100 | |
40 | ||
41 | #define MAX_FULL_DATUM 32 | |
42 | ||
43 | #define HAS_PREFIX(str, prfx) (*(str) == *(prfx) \ | |
44 | && strncmp(str, prfx, sizeof (prfx) - 1) == 0) | |
45 | ||
46 | #define XATTR_ABBREV(x) ((size_t)((x).name - (x).datum) < (x).datum_len) | |
47 | ||
6283e9ef WD |
48 | #define XSTATE_ABBREV 1 |
49 | #define XSTATE_DONE 2 | |
50 | #define XSTATE_TODO 3 | |
16edf865 WD |
51 | |
52 | #define USER_PREFIX "user." | |
53 | #define UPRE_LEN ((int)sizeof USER_PREFIX - 1) | |
54 | #define SYSTEM_PREFIX "system." | |
55 | #define SPRE_LEN ((int)sizeof SYSTEM_PREFIX - 1) | |
56 | ||
57 | #ifdef HAVE_LINUX_XATTRS | |
9439c0cb WD |
58 | #define MIGHT_NEED_RPRE (am_root < 0) |
59 | #define RSYNC_PREFIX USER_PREFIX "rsync." | |
16edf865 | 60 | #else |
9439c0cb | 61 | #define MIGHT_NEED_RPRE am_root |
16edf865 | 62 | #define RSYNC_PREFIX "rsync." |
16edf865 | 63 | #endif |
9439c0cb WD |
64 | #define RPRE_LEN ((int)sizeof RSYNC_PREFIX - 1) |
65 | ||
d724dd18 WD |
66 | #define XSTAT_SUFFIX "stat" |
67 | #define XSTAT_ATTR RSYNC_PREFIX "%" XSTAT_SUFFIX | |
68 | #define XACC_ACL_SUFFIX "aacl" | |
69 | #define XACC_ACL_ATTR RSYNC_PREFIX "%" XACC_ACL_SUFFIX | |
70 | #define XDEF_ACL_SUFFIX "dacl" | |
71 | #define XDEF_ACL_ATTR RSYNC_PREFIX "%" XDEF_ACL_SUFFIX | |
16edf865 WD |
72 | |
73 | typedef struct { | |
74 | char *datum, *name; | |
75 | size_t datum_len, name_len; | |
68ddbaf6 | 76 | int num; |
16edf865 WD |
77 | } rsync_xa; |
78 | ||
79 | static size_t namebuf_len = 0; | |
80 | static char *namebuf = NULL; | |
81 | ||
82 | static item_list empty_xattr = EMPTY_ITEM_LIST; | |
83 | static item_list rsync_xal_l = EMPTY_ITEM_LIST; | |
84 | ||
cb197514 WD |
85 | static size_t prior_xattr_count = (size_t)-1; |
86 | ||
16edf865 WD |
87 | /* ------------------------------------------------------------------------- */ |
88 | ||
89 | static void rsync_xal_free(item_list *xalp) | |
90 | { | |
91 | size_t i; | |
92 | rsync_xa *rxas = xalp->items; | |
93 | ||
94 | for (i = 0; i < xalp->count; i++) { | |
95 | free(rxas[i].datum); | |
96 | /*free(rxas[i].name);*/ | |
97 | } | |
98 | xalp->count = 0; | |
99 | } | |
100 | ||
13710874 | 101 | void free_xattr(stat_x *sxp) |
16edf865 WD |
102 | { |
103 | if (!sxp->xattr) | |
104 | return; | |
105 | rsync_xal_free(sxp->xattr); | |
106 | free(sxp->xattr); | |
107 | sxp->xattr = NULL; | |
108 | } | |
109 | ||
110 | static int rsync_xal_compare_names(const void *x1, const void *x2) | |
111 | { | |
112 | const rsync_xa *xa1 = x1; | |
113 | const rsync_xa *xa2 = x2; | |
114 | return strcmp(xa1->name, xa2->name); | |
115 | } | |
116 | ||
117 | static ssize_t get_xattr_names(const char *fname) | |
118 | { | |
119 | ssize_t list_len; | |
6d56efa6 | 120 | int64 arg; |
16edf865 WD |
121 | |
122 | if (!namebuf) { | |
123 | namebuf_len = 1024; | |
124 | namebuf = new_array(char, namebuf_len); | |
125 | if (!namebuf) | |
126 | out_of_memory("get_xattr_names"); | |
127 | } | |
128 | ||
71daa07f WD |
129 | while (1) { |
130 | /* The length returned includes all the '\0' terminators. */ | |
131 | list_len = sys_llistxattr(fname, namebuf, namebuf_len); | |
132 | if (list_len >= 0) { | |
133 | if ((size_t)list_len <= namebuf_len) | |
134 | break; | |
135 | } else if (errno == ENOTSUP) | |
136 | return 0; | |
137 | else if (errno != ERANGE) { | |
6d56efa6 | 138 | arg = namebuf_len; |
71daa07f | 139 | got_error: |
3f0211b6 | 140 | rsyserr(FERROR_XFER, errno, |
6d56efa6 | 141 | "get_xattr_names: llistxattr(\"%s\",%s) failed", |
adc2476f | 142 | fname, big_num(arg)); |
16edf865 WD |
143 | return -1; |
144 | } | |
71daa07f WD |
145 | list_len = sys_llistxattr(fname, NULL, 0); |
146 | if (list_len < 0) { | |
147 | arg = 0; | |
148 | goto got_error; | |
149 | } | |
16edf865 WD |
150 | if (namebuf_len) |
151 | free(namebuf); | |
152 | namebuf_len = list_len + 1024; | |
153 | namebuf = new_array(char, namebuf_len); | |
154 | if (!namebuf) | |
155 | out_of_memory("get_xattr_names"); | |
16edf865 WD |
156 | } |
157 | ||
71daa07f | 158 | return list_len; |
16edf865 WD |
159 | } |
160 | ||
161 | /* On entry, the *len_ptr parameter contains the size of the extra space we | |
162 | * should allocate when we create a buffer for the data. On exit, it contains | |
163 | * the length of the datum. */ | |
164 | static char *get_xattr_data(const char *fname, const char *name, size_t *len_ptr, | |
165 | int no_missing_error) | |
166 | { | |
167 | size_t datum_len = sys_lgetxattr(fname, name, NULL, 0); | |
41979f25 | 168 | size_t extra_len = *len_ptr; |
16edf865 WD |
169 | char *ptr; |
170 | ||
41979f25 WD |
171 | *len_ptr = datum_len; |
172 | ||
16edf865 WD |
173 | if (datum_len == (size_t)-1) { |
174 | if (errno == ENOTSUP || no_missing_error) | |
175 | return NULL; | |
3f0211b6 | 176 | rsyserr(FERROR_XFER, errno, |
16edf865 WD |
177 | "get_xattr_data: lgetxattr(\"%s\",\"%s\",0) failed", |
178 | fname, name); | |
179 | return NULL; | |
180 | } | |
181 | ||
41979f25 WD |
182 | if (!datum_len && !extra_len) |
183 | extra_len = 1; /* request non-zero amount of memory */ | |
774d1c36 WD |
184 | if (datum_len + extra_len < datum_len) |
185 | overflow_exit("get_xattr_data"); | |
186 | if (!(ptr = new_array(char, datum_len + extra_len))) | |
16edf865 WD |
187 | out_of_memory("get_xattr_data"); |
188 | ||
16edf865 WD |
189 | if (datum_len) { |
190 | size_t len = sys_lgetxattr(fname, name, ptr, datum_len); | |
191 | if (len != datum_len) { | |
192 | if (len == (size_t)-1) { | |
3f0211b6 | 193 | rsyserr(FERROR_XFER, errno, |
16edf865 WD |
194 | "get_xattr_data: lgetxattr(\"%s\",\"%s\",%ld)" |
195 | " failed", fname, name, (long)datum_len); | |
196 | } else { | |
3f0211b6 | 197 | rprintf(FERROR_XFER, |
16edf865 WD |
198 | "get_xattr_data: lgetxattr(\"%s\",\"%s\",%ld)" |
199 | " returned %ld\n", fname, name, | |
200 | (long)datum_len, (long)len); | |
201 | } | |
202 | free(ptr); | |
203 | return NULL; | |
204 | } | |
205 | } | |
206 | ||
207 | return ptr; | |
208 | } | |
209 | ||
210 | static int rsync_xal_get(const char *fname, item_list *xalp) | |
211 | { | |
212 | ssize_t list_len, name_len; | |
213 | size_t datum_len, name_offset; | |
214 | char *name, *ptr; | |
215 | #ifdef HAVE_LINUX_XATTRS | |
216 | int user_only = am_sender ? 0 : !am_root; | |
217 | #endif | |
68ddbaf6 WD |
218 | rsync_xa *rxa; |
219 | int count; | |
16edf865 WD |
220 | |
221 | /* This puts the name list into the "namebuf" buffer. */ | |
222 | if ((list_len = get_xattr_names(fname)) < 0) | |
223 | return -1; | |
224 | ||
225 | for (name = namebuf; list_len > 0; name += name_len) { | |
16edf865 WD |
226 | name_len = strlen(name) + 1; |
227 | list_len -= name_len; | |
228 | ||
229 | #ifdef HAVE_LINUX_XATTRS | |
230 | /* We always ignore the system namespace, and non-root | |
231 | * ignores everything but the user namespace. */ | |
232 | if (user_only ? !HAS_PREFIX(name, USER_PREFIX) | |
233 | : HAS_PREFIX(name, SYSTEM_PREFIX)) | |
234 | continue; | |
235 | #endif | |
236 | ||
524eaa82 | 237 | /* No rsync.%FOO attributes are copied w/o 2 -X options. */ |
a685271d WD |
238 | if (name_len > RPRE_LEN && name[RPRE_LEN] == '%' |
239 | && HAS_PREFIX(name, RSYNC_PREFIX)) { | |
240 | if ((am_sender && preserve_xattrs < 2) | |
d724dd18 WD |
241 | || (am_root < 0 |
242 | && (strcmp(name+RPRE_LEN+1, XSTAT_SUFFIX) == 0 | |
243 | || strcmp(name+RPRE_LEN+1, XACC_ACL_SUFFIX) == 0 | |
244 | || strcmp(name+RPRE_LEN+1, XDEF_ACL_SUFFIX) == 0))) | |
a685271d WD |
245 | continue; |
246 | } | |
9439c0cb | 247 | |
16edf865 WD |
248 | datum_len = name_len; /* Pass extra size to get_xattr_data() */ |
249 | if (!(ptr = get_xattr_data(fname, name, &datum_len, 0))) | |
250 | return -1; | |
251 | ||
252 | if (datum_len > MAX_FULL_DATUM) { | |
253 | /* For large datums, we store a flag and a checksum. */ | |
254 | name_offset = 1 + MAX_DIGEST_LEN; | |
255 | sum_init(checksum_seed); | |
256 | sum_update(ptr, datum_len); | |
257 | free(ptr); | |
258 | ||
259 | if (!(ptr = new_array(char, name_offset + name_len))) | |
260 | out_of_memory("rsync_xal_get"); | |
261 | *ptr = XSTATE_ABBREV; | |
262 | sum_end(ptr + 1); | |
263 | } else | |
264 | name_offset = datum_len; | |
265 | ||
a685271d WD |
266 | rxa = EXPAND_ITEM_LIST(xalp, rsync_xa, RSYNC_XAL_INITIAL); |
267 | rxa->name = ptr + name_offset; | |
268 | memcpy(rxa->name, name, name_len); | |
269 | rxa->datum = ptr; | |
270 | rxa->name_len = name_len; | |
271 | rxa->datum_len = datum_len; | |
16edf865 | 272 | } |
68ddbaf6 WD |
273 | count = xalp->count; |
274 | rxa = xalp->items; | |
275 | if (count > 1) | |
276 | qsort(rxa, count, sizeof (rsync_xa), rsync_xal_compare_names); | |
277 | for (rxa += count-1; count; count--, rxa--) | |
278 | rxa->num = count; | |
16edf865 WD |
279 | return 0; |
280 | } | |
281 | ||
282 | /* Read the xattr(s) for this filename. */ | |
13710874 | 283 | int get_xattr(const char *fname, stat_x *sxp) |
16edf865 WD |
284 | { |
285 | sxp->xattr = new(item_list); | |
286 | *sxp->xattr = empty_xattr; | |
0d5ebab1 WD |
287 | |
288 | #ifdef NO_SPECIAL_XATTRS | |
289 | if (IS_SPECIAL(sxp->st.st_mode)) | |
290 | return 0; | |
291 | #endif | |
292 | #ifdef NO_DEVICE_XATTRS | |
293 | if (IS_DEVICE(sxp->st.st_mode)) | |
294 | return 0; | |
295 | #endif | |
296 | #ifdef NO_SYMLINK_XATTRS | |
297 | if (S_ISLNK(sxp->st.st_mode)) | |
298 | return 0; | |
299 | #endif | |
300 | ||
16edf865 WD |
301 | if (rsync_xal_get(fname, sxp->xattr) < 0) { |
302 | free_xattr(sxp); | |
303 | return -1; | |
304 | } | |
305 | return 0; | |
306 | } | |
307 | ||
e9489cd6 WD |
308 | int copy_xattrs(const char *source, const char *dest) |
309 | { | |
310 | ssize_t list_len, name_len; | |
311 | size_t datum_len; | |
312 | char *name, *ptr; | |
313 | #ifdef HAVE_LINUX_XATTRS | |
97dde6b6 | 314 | int user_only = am_sender ? 0 : am_root <= 0; |
e9489cd6 WD |
315 | #endif |
316 | ||
317 | /* This puts the name list into the "namebuf" buffer. */ | |
318 | if ((list_len = get_xattr_names(source)) < 0) | |
319 | return -1; | |
320 | ||
321 | for (name = namebuf; list_len > 0; name += name_len) { | |
322 | name_len = strlen(name) + 1; | |
323 | list_len -= name_len; | |
324 | ||
325 | #ifdef HAVE_LINUX_XATTRS | |
326 | /* We always ignore the system namespace, and non-root | |
327 | * ignores everything but the user namespace. */ | |
328 | if (user_only ? !HAS_PREFIX(name, USER_PREFIX) | |
329 | : HAS_PREFIX(name, SYSTEM_PREFIX)) | |
330 | continue; | |
331 | #endif | |
332 | ||
333 | datum_len = 0; | |
334 | if (!(ptr = get_xattr_data(source, name, &datum_len, 0))) | |
335 | return -1; | |
336 | if (sys_lsetxattr(dest, name, ptr, datum_len) < 0) { | |
337 | int save_errno = errno ? errno : EINVAL; | |
338 | rsyserr(FERROR_XFER, errno, | |
339 | "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed", | |
340 | dest, name); | |
341 | errno = save_errno; | |
342 | return -1; | |
343 | } | |
344 | free(ptr); | |
345 | } | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
16edf865 WD |
350 | static int find_matching_xattr(item_list *xalp) |
351 | { | |
352 | size_t i, j; | |
353 | item_list *lst = rsync_xal_l.items; | |
354 | ||
355 | for (i = 0; i < rsync_xal_l.count; i++) { | |
356 | rsync_xa *rxas1 = lst[i].items; | |
357 | rsync_xa *rxas2 = xalp->items; | |
358 | ||
359 | /* Wrong number of elements? */ | |
360 | if (lst[i].count != xalp->count) | |
361 | continue; | |
362 | /* any elements different? */ | |
363 | for (j = 0; j < xalp->count; j++) { | |
364 | if (rxas1[j].name_len != rxas2[j].name_len | |
365 | || rxas1[j].datum_len != rxas2[j].datum_len | |
366 | || strcmp(rxas1[j].name, rxas2[j].name)) | |
367 | break; | |
368 | if (rxas1[j].datum_len > MAX_FULL_DATUM) { | |
369 | if (memcmp(rxas1[j].datum + 1, | |
370 | rxas2[j].datum + 1, | |
371 | MAX_DIGEST_LEN) != 0) | |
372 | break; | |
373 | } else { | |
374 | if (memcmp(rxas1[j].datum, rxas2[j].datum, | |
375 | rxas2[j].datum_len)) | |
376 | break; | |
377 | } | |
378 | } | |
379 | /* no differences found. This is The One! */ | |
380 | if (j == xalp->count) | |
381 | return i; | |
382 | } | |
383 | ||
384 | return -1; | |
385 | } | |
386 | ||
387 | /* Store *xalp on the end of rsync_xal_l */ | |
388 | static void rsync_xal_store(item_list *xalp) | |
389 | { | |
390 | item_list *new_lst = EXPAND_ITEM_LIST(&rsync_xal_l, item_list, RSYNC_XAL_LIST_INITIAL); | |
391 | /* Since the following call starts a new list, we know it will hold the | |
392 | * entire initial-count, not just enough space for one new item. */ | |
393 | *new_lst = empty_xattr; | |
394 | (void)EXPAND_ITEM_LIST(new_lst, rsync_xa, xalp->count); | |
395 | memcpy(new_lst->items, xalp->items, xalp->count * sizeof (rsync_xa)); | |
396 | new_lst->count = xalp->count; | |
397 | xalp->count = 0; | |
398 | } | |
399 | ||
400 | /* Send the make_xattr()-generated xattr list for this flist entry. */ | |
13710874 | 401 | int send_xattr(stat_x *sxp, int f) |
16edf865 WD |
402 | { |
403 | int ndx = find_matching_xattr(sxp->xattr); | |
404 | ||
405 | /* Send 0 (-1 + 1) to indicate that literal xattr data follows. */ | |
f31514ad | 406 | write_varint(f, ndx + 1); |
16edf865 WD |
407 | |
408 | if (ndx < 0) { | |
409 | rsync_xa *rxa; | |
410 | int count = sxp->xattr->count; | |
f31514ad | 411 | write_varint(f, count); |
16edf865 | 412 | for (rxa = sxp->xattr->items; count--; rxa++) { |
b4e6aac9 | 413 | size_t name_len = rxa->name_len; |
d724dd18 WD |
414 | const char *name = rxa->name; |
415 | /* Strip the rsync prefix from disguised namespaces. */ | |
b4e6aac9 | 416 | if (name_len > RPRE_LEN |
16edf865 | 417 | #ifdef HAVE_LINUX_XATTRS |
b4e6aac9 | 418 | && am_root < 0 |
d724dd18 | 419 | #endif |
b4e6aac9 | 420 | && name[RPRE_LEN] != '%' && HAS_PREFIX(name, RSYNC_PREFIX)) { |
d724dd18 WD |
421 | name += RPRE_LEN; |
422 | name_len -= RPRE_LEN; | |
423 | } | |
424 | #ifndef HAVE_LINUX_XATTRS | |
425 | else { | |
426 | /* Put everything else in the user namespace. */ | |
427 | name_len += UPRE_LEN; | |
428 | } | |
429 | #endif | |
430 | write_varint(f, name_len); | |
f31514ad | 431 | write_varint(f, rxa->datum_len); |
d724dd18 WD |
432 | #ifndef HAVE_LINUX_XATTRS |
433 | if (name_len > rxa->name_len) { | |
16edf865 | 434 | write_buf(f, USER_PREFIX, UPRE_LEN); |
d724dd18 | 435 | name_len -= UPRE_LEN; |
16edf865 WD |
436 | } |
437 | #endif | |
d724dd18 | 438 | write_buf(f, name, name_len); |
16edf865 WD |
439 | if (rxa->datum_len > MAX_FULL_DATUM) |
440 | write_buf(f, rxa->datum + 1, MAX_DIGEST_LEN); | |
441 | else | |
442 | write_buf(f, rxa->datum, rxa->datum_len); | |
443 | } | |
444 | ndx = rsync_xal_l.count; /* pre-incremented count */ | |
445 | rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */ | |
446 | } | |
447 | ||
448 | return ndx; | |
449 | } | |
450 | ||
451 | /* Return a flag indicating if we need to change a file's xattrs. If | |
452 | * "find_all" is specified, also mark any abbreviated xattrs that we | |
453 | * need so that send_xattr_request() can tell the sender about them. */ | |
13710874 | 454 | int xattr_diff(struct file_struct *file, stat_x *sxp, int find_all) |
16edf865 WD |
455 | { |
456 | item_list *lst = rsync_xal_l.items; | |
457 | rsync_xa *snd_rxa, *rec_rxa; | |
458 | int snd_cnt, rec_cnt; | |
459 | int cmp, same, xattrs_equal = 1; | |
460 | ||
461 | if (sxp && XATTR_READY(*sxp)) { | |
462 | rec_rxa = sxp->xattr->items; | |
463 | rec_cnt = sxp->xattr->count; | |
464 | } else { | |
465 | rec_rxa = NULL; | |
466 | rec_cnt = 0; | |
467 | } | |
468 | ||
469 | if (F_XATTR(file) >= 0) | |
470 | lst += F_XATTR(file); | |
471 | else | |
472 | lst = &empty_xattr; | |
473 | ||
474 | snd_rxa = lst->items; | |
475 | snd_cnt = lst->count; | |
476 | ||
477 | /* If the count of the sender's xattrs is different from our | |
478 | * (receiver's) xattrs, the lists are not the same. */ | |
479 | if (snd_cnt != rec_cnt) { | |
480 | if (!find_all) | |
481 | return 1; | |
482 | xattrs_equal = 0; | |
483 | } | |
484 | ||
485 | while (snd_cnt) { | |
486 | cmp = rec_cnt ? strcmp(snd_rxa->name, rec_rxa->name) : -1; | |
487 | if (cmp > 0) | |
488 | same = 0; | |
489 | else if (snd_rxa->datum_len > MAX_FULL_DATUM) { | |
490 | same = cmp == 0 && snd_rxa->datum_len == rec_rxa->datum_len | |
491 | && memcmp(snd_rxa->datum + 1, rec_rxa->datum + 1, | |
492 | MAX_DIGEST_LEN) == 0; | |
493 | /* Flag unrequested items that we need. */ | |
494 | if (!same && find_all && snd_rxa->datum[0] == XSTATE_ABBREV) | |
495 | snd_rxa->datum[0] = XSTATE_TODO; | |
496 | } else { | |
497 | same = cmp == 0 && snd_rxa->datum_len == rec_rxa->datum_len | |
498 | && memcmp(snd_rxa->datum, rec_rxa->datum, | |
499 | snd_rxa->datum_len) == 0; | |
500 | } | |
501 | if (!same) { | |
502 | if (!find_all) | |
503 | return 1; | |
504 | xattrs_equal = 0; | |
505 | } | |
506 | ||
507 | if (cmp <= 0) { | |
508 | snd_rxa++; | |
509 | snd_cnt--; | |
510 | } | |
511 | if (cmp >= 0) { | |
512 | rec_rxa++; | |
513 | rec_cnt--; | |
514 | } | |
515 | } | |
516 | ||
517 | if (rec_cnt) | |
518 | xattrs_equal = 0; | |
519 | ||
520 | return !xattrs_equal; | |
521 | } | |
522 | ||
7462c6ac WD |
523 | /* When called by the generator (with a NULL fname), this tells the sender |
524 | * all the abbreviated xattr values we need. When called by the sender | |
525 | * (with a non-NULL fname), we send all the extra xattr data it needs. | |
526 | * The generator may also call with f_out < 0 to just change all the | |
527 | * XSTATE_ABBREV states into XSTATE_DONE. */ | |
16edf865 WD |
528 | void send_xattr_request(const char *fname, struct file_struct *file, int f_out) |
529 | { | |
530 | item_list *lst = rsync_xal_l.items; | |
68ddbaf6 | 531 | int cnt, prior_req = 0; |
16edf865 WD |
532 | rsync_xa *rxa; |
533 | ||
534 | lst += F_XATTR(file); | |
68ddbaf6 | 535 | for (rxa = lst->items, cnt = lst->count; cnt--; rxa++) { |
16edf865 WD |
536 | if (rxa->datum_len <= MAX_FULL_DATUM) |
537 | continue; | |
538 | switch (rxa->datum[0]) { | |
b769ad6a WD |
539 | case XSTATE_ABBREV: |
540 | /* Items left abbreviated matched the sender's checksum, so | |
541 | * the receiver will cache the local data for future use. */ | |
542 | if (am_generator) | |
543 | rxa->datum[0] = XSTATE_DONE; | |
16edf865 WD |
544 | continue; |
545 | case XSTATE_TODO: | |
7462c6ac | 546 | assert(f_out >= 0); |
16edf865 WD |
547 | break; |
548 | default: | |
549 | continue; | |
550 | } | |
551 | ||
552 | /* Flag that we handled this abbreviated item. */ | |
553 | rxa->datum[0] = XSTATE_DONE; | |
554 | ||
68ddbaf6 WD |
555 | write_varint(f_out, rxa->num - prior_req); |
556 | prior_req = rxa->num; | |
16edf865 WD |
557 | |
558 | if (fname) { | |
559 | size_t len = 0; | |
560 | char *ptr; | |
561 | ||
562 | /* Re-read the long datum. */ | |
a685271d WD |
563 | if (!(ptr = get_xattr_data(fname, rxa->name, &len, 0))) { |
564 | rprintf(FERROR_XFER, "failed to re-read xattr %s for %s\n", rxa->name, fname); | |
565 | write_varint(f_out, 0); | |
16edf865 | 566 | continue; |
a685271d | 567 | } |
16edf865 | 568 | |
f31514ad | 569 | write_varint(f_out, len); /* length might have changed! */ |
16edf865 WD |
570 | write_buf(f_out, ptr, len); |
571 | free(ptr); | |
572 | } | |
573 | } | |
574 | ||
7462c6ac WD |
575 | if (f_out >= 0) |
576 | write_byte(f_out, 0); /* end the list */ | |
16edf865 WD |
577 | } |
578 | ||
16edf865 WD |
579 | /* When called by the sender, read the request from the generator and mark |
580 | * any needed xattrs with a flag that lets us know they need to be sent to | |
581 | * the receiver. When called by the receiver, reads the sent data and | |
582 | * stores it in place of its checksum. */ | |
e107b6b1 | 583 | int recv_xattr_request(struct file_struct *file, int f_in) |
16edf865 WD |
584 | { |
585 | item_list *lst = rsync_xal_l.items; | |
586 | char *old_datum, *name; | |
587 | rsync_xa *rxa; | |
68ddbaf6 | 588 | int rel_pos, cnt, num, got_xattr_data = 0; |
16edf865 WD |
589 | |
590 | if (F_XATTR(file) < 0) { | |
591 | rprintf(FERROR, "recv_xattr_request: internal data error!\n"); | |
592 | exit_cleanup(RERR_STREAMIO); | |
593 | } | |
594 | lst += F_XATTR(file); | |
595 | ||
596 | cnt = lst->count; | |
597 | rxa = lst->items; | |
68ddbaf6 | 598 | num = 0; |
f31514ad | 599 | while ((rel_pos = read_varint(f_in)) != 0) { |
68ddbaf6 WD |
600 | num += rel_pos; |
601 | while (cnt && rxa->num < num) { | |
602 | rxa++; | |
603 | cnt--; | |
604 | } | |
605 | if (!cnt || rxa->num != num) { | |
606 | rprintf(FERROR, "[%s] could not find xattr #%d for %s\n", | |
607 | who_am_i(), num, f_name(file, NULL)); | |
608 | exit_cleanup(RERR_STREAMIO); | |
609 | } | |
6283e9ef | 610 | if (!XATTR_ABBREV(*rxa) || rxa->datum[0] != XSTATE_ABBREV) { |
e424e261 WD |
611 | rprintf(FERROR, "[%s] internal abbrev error on %s (%s, len=%ld)!\n", |
612 | who_am_i(), f_name(file, NULL), rxa->name, (long)rxa->datum_len); | |
16edf865 WD |
613 | exit_cleanup(RERR_STREAMIO); |
614 | } | |
615 | ||
616 | if (am_sender) { | |
617 | rxa->datum[0] = XSTATE_TODO; | |
618 | continue; | |
619 | } | |
620 | ||
621 | old_datum = rxa->datum; | |
f31514ad | 622 | rxa->datum_len = read_varint(f_in); |
16edf865 WD |
623 | |
624 | if (rxa->name_len + rxa->datum_len < rxa->name_len) | |
774d1c36 | 625 | overflow_exit("recv_xattr_request"); |
16edf865 WD |
626 | rxa->datum = new_array(char, rxa->datum_len + rxa->name_len); |
627 | if (!rxa->datum) | |
628 | out_of_memory("recv_xattr_request"); | |
629 | name = rxa->datum + rxa->datum_len; | |
630 | memcpy(name, rxa->name, rxa->name_len); | |
631 | rxa->name = name; | |
632 | free(old_datum); | |
633 | read_buf(f_in, rxa->datum, rxa->datum_len); | |
e107b6b1 | 634 | got_xattr_data = 1; |
16edf865 | 635 | } |
e107b6b1 WD |
636 | |
637 | return got_xattr_data; | |
16edf865 WD |
638 | } |
639 | ||
640 | /* ------------------------------------------------------------------------- */ | |
641 | ||
642 | /* receive and build the rsync_xattr_lists */ | |
643 | void receive_xattr(struct file_struct *file, int f) | |
644 | { | |
645 | static item_list temp_xattr = EMPTY_ITEM_LIST; | |
68ddbaf6 | 646 | int count, num; |
d724dd18 WD |
647 | #ifdef HAVE_LINUX_XATTRS |
648 | int need_sort = 0; | |
649 | #else | |
650 | int need_sort = 1; | |
651 | #endif | |
f31514ad | 652 | int ndx = read_varint(f); |
16edf865 WD |
653 | |
654 | if (ndx < 0 || (size_t)ndx > rsync_xal_l.count) { | |
655 | rprintf(FERROR, "receive_xattr: xa index %d out of" | |
656 | " range for %s\n", ndx, f_name(file, NULL)); | |
657 | exit_cleanup(RERR_STREAMIO); | |
658 | } | |
659 | ||
660 | if (ndx != 0) { | |
661 | F_XATTR(file) = ndx - 1; | |
662 | return; | |
663 | } | |
664 | ||
f31514ad | 665 | if ((count = read_varint(f)) != 0) { |
16edf865 WD |
666 | (void)EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, count); |
667 | temp_xattr.count = 0; | |
668 | } | |
669 | ||
68ddbaf6 | 670 | for (num = 1; num <= count; num++) { |
16edf865 WD |
671 | char *ptr, *name; |
672 | rsync_xa *rxa; | |
f31514ad WD |
673 | size_t name_len = read_varint(f); |
674 | size_t datum_len = read_varint(f); | |
16edf865 | 675 | size_t dget_len = datum_len > MAX_FULL_DATUM ? 1 + MAX_DIGEST_LEN : datum_len; |
9439c0cb | 676 | size_t extra_len = MIGHT_NEED_RPRE ? RPRE_LEN : 0; |
774d1c36 WD |
677 | if ((dget_len + extra_len < dget_len) |
678 | || (dget_len + extra_len + name_len < dget_len)) | |
679 | overflow_exit("receive_xattr"); | |
16edf865 WD |
680 | ptr = new_array(char, dget_len + extra_len + name_len); |
681 | if (!ptr) | |
682 | out_of_memory("receive_xattr"); | |
683 | name = ptr + dget_len + extra_len; | |
684 | read_buf(f, name, name_len); | |
685 | if (dget_len == datum_len) | |
686 | read_buf(f, ptr, dget_len); | |
687 | else { | |
688 | *ptr = XSTATE_ABBREV; | |
689 | read_buf(f, ptr + 1, MAX_DIGEST_LEN); | |
690 | } | |
691 | #ifdef HAVE_LINUX_XATTRS | |
692 | /* Non-root can only save the user namespace. */ | |
68ddbaf6 WD |
693 | if (am_root <= 0 && !HAS_PREFIX(name, USER_PREFIX)) { |
694 | if (!am_root) { | |
695 | free(ptr); | |
696 | continue; | |
697 | } | |
698 | name -= RPRE_LEN; | |
699 | name_len += RPRE_LEN; | |
700 | memcpy(name, RSYNC_PREFIX, RPRE_LEN); | |
d724dd18 | 701 | need_sort = 1; |
16edf865 WD |
702 | } |
703 | #else | |
704 | /* This OS only has a user namespace, so we either | |
705 | * strip the user prefix, or we put a non-user | |
706 | * namespace inside our rsync hierarchy. */ | |
707 | if (HAS_PREFIX(name, USER_PREFIX)) { | |
708 | name += UPRE_LEN; | |
709 | name_len -= UPRE_LEN; | |
710 | } else if (am_root) { | |
711 | name -= RPRE_LEN; | |
712 | name_len += RPRE_LEN; | |
713 | memcpy(name, RSYNC_PREFIX, RPRE_LEN); | |
714 | } else { | |
715 | free(ptr); | |
716 | continue; | |
717 | } | |
718 | #endif | |
524eaa82 WD |
719 | /* No rsync.%FOO attributes are copied w/o 2 -X options. */ |
720 | if (preserve_xattrs < 2 && name_len > RPRE_LEN | |
721 | && name[RPRE_LEN] == '%' && HAS_PREFIX(name, RSYNC_PREFIX)) { | |
9439c0cb WD |
722 | free(ptr); |
723 | continue; | |
724 | } | |
16edf865 WD |
725 | rxa = EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, 1); |
726 | rxa->name = name; | |
727 | rxa->datum = ptr; | |
728 | rxa->name_len = name_len; | |
729 | rxa->datum_len = datum_len; | |
68ddbaf6 | 730 | rxa->num = num; |
16edf865 WD |
731 | } |
732 | ||
d724dd18 WD |
733 | if (need_sort && count > 1) |
734 | qsort(temp_xattr.items, count, sizeof (rsync_xa), rsync_xal_compare_names); | |
735 | ||
16edf865 WD |
736 | ndx = rsync_xal_l.count; /* pre-incremented count */ |
737 | rsync_xal_store(&temp_xattr); /* adds item to rsync_xal_l */ | |
738 | ||
739 | F_XATTR(file) = ndx; | |
740 | } | |
741 | ||
13710874 | 742 | /* Turn the xattr data in stat_x into cached xattr data, setting the index |
16edf865 | 743 | * values in the file struct. */ |
cb197514 | 744 | void cache_tmp_xattr(struct file_struct *file, stat_x *sxp) |
16edf865 WD |
745 | { |
746 | int ndx; | |
747 | ||
748 | if (!sxp->xattr) | |
749 | return; | |
750 | ||
cb197514 WD |
751 | if (prior_xattr_count == (size_t)-1) |
752 | prior_xattr_count = rsync_xal_l.count; | |
16edf865 WD |
753 | ndx = find_matching_xattr(sxp->xattr); |
754 | if (ndx < 0) | |
755 | rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */ | |
756 | ||
757 | F_XATTR(file) = ndx; | |
758 | } | |
759 | ||
cb197514 WD |
760 | void uncache_tmp_xattrs(void) |
761 | { | |
762 | if (prior_xattr_count != (size_t)-1) { | |
763 | item_list *xattr_item = rsync_xal_l.items; | |
764 | item_list *xattr_start = xattr_item + prior_xattr_count; | |
765 | xattr_item += rsync_xal_l.count; | |
766 | rsync_xal_l.count = prior_xattr_count; | |
767 | while (xattr_item-- > xattr_start) { | |
768 | rsync_xal_free(xattr_item); | |
769 | free(xattr_item); | |
770 | } | |
771 | prior_xattr_count = (size_t)-1; | |
772 | } | |
773 | } | |
774 | ||
16edf865 | 775 | static int rsync_xal_set(const char *fname, item_list *xalp, |
13710874 | 776 | const char *fnamecmp, stat_x *sxp) |
16edf865 WD |
777 | { |
778 | rsync_xa *rxas = xalp->items; | |
779 | ssize_t list_len; | |
780 | size_t i, len; | |
781 | char *name, *ptr, sum[MAX_DIGEST_LEN]; | |
97dde6b6 WD |
782 | #ifdef HAVE_LINUX_XATTRS |
783 | int user_only = am_root <= 0; | |
784 | #endif | |
b4e6aac9 WD |
785 | size_t name_len; |
786 | int ret = 0; | |
16edf865 WD |
787 | |
788 | /* This puts the current name list into the "namebuf" buffer. */ | |
789 | if ((list_len = get_xattr_names(fname)) < 0) | |
790 | return -1; | |
791 | ||
792 | for (i = 0; i < xalp->count; i++) { | |
793 | name = rxas[i].name; | |
794 | ||
795 | if (XATTR_ABBREV(rxas[i])) { | |
796 | /* See if the fnamecmp version is identical. */ | |
797 | len = name_len = rxas[i].name_len; | |
798 | if ((ptr = get_xattr_data(fnamecmp, name, &len, 1)) == NULL) { | |
799 | still_abbrev: | |
800 | if (am_generator) | |
801 | continue; | |
802 | rprintf(FERROR, "Missing abbreviated xattr value, %s, for %s\n", | |
803 | rxas[i].name, full_fname(fname)); | |
804 | ret = -1; | |
805 | continue; | |
806 | } | |
807 | if (len != rxas[i].datum_len) { | |
808 | free(ptr); | |
809 | goto still_abbrev; | |
810 | } | |
811 | ||
812 | sum_init(checksum_seed); | |
813 | sum_update(ptr, len); | |
814 | sum_end(sum); | |
815 | if (memcmp(sum, rxas[i].datum + 1, MAX_DIGEST_LEN) != 0) { | |
816 | free(ptr); | |
817 | goto still_abbrev; | |
818 | } | |
819 | ||
820 | if (fname == fnamecmp) | |
821 | ; /* Value is already set when identical */ | |
822 | else if (sys_lsetxattr(fname, name, ptr, len) < 0) { | |
3f0211b6 | 823 | rsyserr(FERROR_XFER, errno, |
16edf865 WD |
824 | "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed", |
825 | fname, name); | |
826 | ret = -1; | |
827 | } else /* make sure caller sets mtime */ | |
828 | sxp->st.st_mtime = (time_t)-1; | |
829 | ||
830 | if (am_generator) { /* generator items stay abbreviated */ | |
16edf865 WD |
831 | free(ptr); |
832 | continue; | |
833 | } | |
834 | ||
835 | memcpy(ptr + len, name, name_len); | |
836 | free(rxas[i].datum); | |
837 | ||
838 | rxas[i].name = name = ptr + len; | |
839 | rxas[i].datum = ptr; | |
840 | continue; | |
841 | } | |
842 | ||
843 | if (sys_lsetxattr(fname, name, rxas[i].datum, rxas[i].datum_len) < 0) { | |
3f0211b6 | 844 | rsyserr(FERROR_XFER, errno, |
16edf865 WD |
845 | "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed", |
846 | fname, name); | |
847 | ret = -1; | |
848 | } else /* make sure caller sets mtime */ | |
849 | sxp->st.st_mtime = (time_t)-1; | |
850 | } | |
851 | ||
852 | /* Remove any extraneous names. */ | |
853 | for (name = namebuf; list_len > 0; name += name_len) { | |
854 | name_len = strlen(name) + 1; | |
855 | list_len -= name_len; | |
856 | ||
857 | #ifdef HAVE_LINUX_XATTRS | |
858 | /* We always ignore the system namespace, and non-root | |
859 | * ignores everything but the user namespace. */ | |
97dde6b6 WD |
860 | if (user_only ? !HAS_PREFIX(name, USER_PREFIX) |
861 | : HAS_PREFIX(name, SYSTEM_PREFIX)) | |
16edf865 WD |
862 | continue; |
863 | #endif | |
e107b6b1 WD |
864 | if (am_root < 0 && name_len > RPRE_LEN |
865 | && name[RPRE_LEN] == '%' && strcmp(name, XSTAT_ATTR) == 0) | |
866 | continue; | |
16edf865 WD |
867 | |
868 | for (i = 0; i < xalp->count; i++) { | |
869 | if (strcmp(name, rxas[i].name) == 0) | |
870 | break; | |
871 | } | |
872 | if (i == xalp->count) { | |
873 | if (sys_lremovexattr(fname, name) < 0) { | |
3f0211b6 | 874 | rsyserr(FERROR_XFER, errno, |
16edf865 WD |
875 | "rsync_xal_clear: lremovexattr(\"%s\",\"%s\") failed", |
876 | fname, name); | |
877 | ret = -1; | |
878 | } else /* make sure caller sets mtime */ | |
879 | sxp->st.st_mtime = (time_t)-1; | |
880 | } | |
881 | } | |
882 | ||
883 | return ret; | |
884 | } | |
885 | ||
886 | /* Set extended attributes on indicated filename. */ | |
887 | int set_xattr(const char *fname, const struct file_struct *file, | |
13710874 | 888 | const char *fnamecmp, stat_x *sxp) |
16edf865 WD |
889 | { |
890 | int ndx; | |
891 | item_list *lst = rsync_xal_l.items; | |
892 | ||
893 | if (dry_run) | |
894 | return 1; /* FIXME: --dry-run needs to compute this value */ | |
895 | ||
896 | if (read_only || list_only) { | |
897 | errno = EROFS; | |
898 | return -1; | |
899 | } | |
900 | ||
0d5ebab1 WD |
901 | #ifdef NO_SPECIAL_XATTRS |
902 | if (IS_SPECIAL(sxp->st.st_mode)) { | |
903 | errno = ENOTSUP; | |
904 | return -1; | |
905 | } | |
906 | #endif | |
907 | #ifdef NO_DEVICE_XATTRS | |
908 | if (IS_DEVICE(sxp->st.st_mode)) { | |
909 | errno = ENOTSUP; | |
910 | return -1; | |
911 | } | |
912 | #endif | |
913 | #ifdef NO_SYMLINK_XATTRS | |
914 | if (S_ISLNK(sxp->st.st_mode)) { | |
915 | errno = ENOTSUP; | |
916 | return -1; | |
917 | } | |
918 | #endif | |
919 | ||
16edf865 WD |
920 | ndx = F_XATTR(file); |
921 | return rsync_xal_set(fname, lst + ndx, fnamecmp, sxp); | |
922 | } | |
923 | ||
7ed6bc53 WD |
924 | #ifdef SUPPORT_ACLS |
925 | char *get_xattr_acl(const char *fname, int is_access_acl, size_t *len_p) | |
926 | { | |
927 | const char *name = is_access_acl ? XACC_ACL_ATTR : XDEF_ACL_ATTR; | |
e516b69e | 928 | *len_p = 0; /* no extra data alloc needed from get_xattr_data() */ |
7ed6bc53 WD |
929 | return get_xattr_data(fname, name, len_p, 1); |
930 | } | |
931 | ||
932 | int set_xattr_acl(const char *fname, int is_access_acl, const char *buf, size_t buf_len) | |
933 | { | |
934 | const char *name = is_access_acl ? XACC_ACL_ATTR : XDEF_ACL_ATTR; | |
935 | if (sys_lsetxattr(fname, name, buf, buf_len) < 0) { | |
3f0211b6 | 936 | rsyserr(FERROR_XFER, errno, |
7ed6bc53 WD |
937 | "set_xattr_acl: lsetxattr(\"%s\",\"%s\") failed", |
938 | fname, name); | |
939 | return -1; | |
940 | } | |
941 | return 0; | |
942 | } | |
943 | ||
944 | int del_def_xattr_acl(const char *fname) | |
945 | { | |
946 | return sys_lremovexattr(fname, XDEF_ACL_ATTR); | |
947 | } | |
948 | #endif | |
949 | ||
9439c0cb WD |
950 | int get_stat_xattr(const char *fname, int fd, STRUCT_STAT *fst, STRUCT_STAT *xst) |
951 | { | |
952 | int mode, rdev_major, rdev_minor, uid, gid, len; | |
953 | char buf[256]; | |
954 | ||
955 | if (am_root >= 0 || IS_DEVICE(fst->st_mode) || IS_SPECIAL(fst->st_mode)) | |
956 | return -1; | |
957 | ||
958 | if (xst) | |
959 | *xst = *fst; | |
960 | else | |
961 | xst = fst; | |
962 | if (fname) { | |
963 | fd = -1; | |
964 | len = sys_lgetxattr(fname, XSTAT_ATTR, buf, sizeof buf - 1); | |
965 | } else { | |
966 | fname = "fd"; | |
967 | len = sys_fgetxattr(fd, XSTAT_ATTR, buf, sizeof buf - 1); | |
968 | } | |
969 | if (len >= (int)sizeof buf) { | |
970 | len = -1; | |
971 | errno = ERANGE; | |
972 | } | |
973 | if (len < 0) { | |
974 | if (errno == ENOTSUP || errno == ENOATTR) | |
975 | return -1; | |
976 | if (errno == EPERM && S_ISLNK(fst->st_mode)) { | |
977 | xst->st_uid = 0; | |
978 | xst->st_gid = 0; | |
979 | return 0; | |
980 | } | |
3f0211b6 | 981 | rsyserr(FERROR_XFER, errno, "failed to read xattr %s for %s", |
9439c0cb WD |
982 | XSTAT_ATTR, full_fname(fname)); |
983 | return -1; | |
984 | } | |
985 | buf[len] = '\0'; | |
986 | ||
987 | if (sscanf(buf, "%o %d,%d %d:%d", | |
988 | &mode, &rdev_major, &rdev_minor, &uid, &gid) != 5) { | |
989 | rprintf(FERROR, "Corrupt %s xattr attached to %s: \"%s\"\n", | |
990 | XSTAT_ATTR, full_fname(fname), buf); | |
991 | exit_cleanup(RERR_FILEIO); | |
992 | } | |
993 | ||
994 | xst->st_mode = from_wire_mode(mode); | |
995 | xst->st_rdev = MAKEDEV(rdev_major, rdev_minor); | |
996 | xst->st_uid = uid; | |
997 | xst->st_gid = gid; | |
998 | ||
999 | return 0; | |
1000 | } | |
1001 | ||
e107b6b1 | 1002 | int set_stat_xattr(const char *fname, struct file_struct *file, mode_t new_mode) |
9439c0cb WD |
1003 | { |
1004 | STRUCT_STAT fst, xst; | |
1005 | dev_t rdev; | |
1006 | mode_t mode, fmode; | |
1007 | ||
1008 | if (dry_run) | |
1009 | return 0; | |
1010 | ||
1011 | if (read_only || list_only) { | |
3f0211b6 | 1012 | rsyserr(FERROR_XFER, EROFS, "failed to write xattr %s for %s", |
9439c0cb WD |
1013 | XSTAT_ATTR, full_fname(fname)); |
1014 | return -1; | |
1015 | } | |
1016 | ||
1017 | if (x_lstat(fname, &fst, &xst) < 0) { | |
3f0211b6 | 1018 | rsyserr(FERROR_XFER, errno, "failed to re-stat %s", |
9439c0cb WD |
1019 | full_fname(fname)); |
1020 | return -1; | |
1021 | } | |
1022 | ||
1023 | fst.st_mode &= (_S_IFMT | CHMOD_BITS); | |
e107b6b1 | 1024 | fmode = new_mode & (_S_IFMT | CHMOD_BITS); |
9439c0cb | 1025 | |
a8e6e148 | 1026 | if (IS_DEVICE(fmode)) { |
9439c0cb WD |
1027 | uint32 *devp = F_RDEV_P(file); |
1028 | rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)); | |
1029 | } else | |
1030 | rdev = 0; | |
1031 | ||
1032 | /* Dump the special permissions and enable full owner access. */ | |
1033 | mode = (fst.st_mode & _S_IFMT) | (fmode & ACCESSPERMS) | |
1034 | | (S_ISDIR(fst.st_mode) ? 0700 : 0600); | |
1035 | if (fst.st_mode != mode) | |
1036 | do_chmod(fname, mode); | |
a8e6e148 | 1037 | if (!IS_DEVICE(fst.st_mode)) |
9439c0cb WD |
1038 | fst.st_rdev = 0; /* just in case */ |
1039 | ||
1040 | if (mode == fmode && fst.st_rdev == rdev | |
fb7b9ddc | 1041 | && fst.st_uid == F_OWNER(file) && fst.st_gid == F_GROUP(file)) { |
9439c0cb WD |
1042 | /* xst.st_mode will be 0 if there's no current stat xattr */ |
1043 | if (xst.st_mode && sys_lremovexattr(fname, XSTAT_ATTR) < 0) { | |
3f0211b6 | 1044 | rsyserr(FERROR_XFER, errno, |
9439c0cb WD |
1045 | "delete of stat xattr failed for %s", |
1046 | full_fname(fname)); | |
1047 | return -1; | |
1048 | } | |
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | if (xst.st_mode != fmode || xst.st_rdev != rdev | |
fb7b9ddc | 1053 | || xst.st_uid != F_OWNER(file) || xst.st_gid != F_GROUP(file)) { |
9439c0cb WD |
1054 | char buf[256]; |
1055 | int len = snprintf(buf, sizeof buf, "%o %u,%u %u:%u", | |
1056 | to_wire_mode(fmode), | |
1057 | (int)major(rdev), (int)minor(rdev), | |
fb7b9ddc | 1058 | F_OWNER(file), F_GROUP(file)); |
9439c0cb WD |
1059 | if (sys_lsetxattr(fname, XSTAT_ATTR, buf, len) < 0) { |
1060 | if (errno == EPERM && S_ISLNK(fst.st_mode)) | |
1061 | return 0; | |
3f0211b6 | 1062 | rsyserr(FERROR_XFER, errno, |
9439c0cb WD |
1063 | "failed to write xattr %s for %s", |
1064 | XSTAT_ATTR, full_fname(fname)); | |
1065 | return -1; | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | int x_stat(const char *fname, STRUCT_STAT *fst, STRUCT_STAT *xst) | |
1073 | { | |
1074 | int ret = do_stat(fname, fst); | |
1075 | if ((ret < 0 || get_stat_xattr(fname, -1, fst, xst) < 0) && xst) | |
1076 | xst->st_mode = 0; | |
1077 | return ret; | |
1078 | } | |
1079 | ||
1080 | int x_lstat(const char *fname, STRUCT_STAT *fst, STRUCT_STAT *xst) | |
1081 | { | |
1082 | int ret = do_lstat(fname, fst); | |
1083 | if ((ret < 0 || get_stat_xattr(fname, -1, fst, xst) < 0) && xst) | |
1084 | xst->st_mode = 0; | |
1085 | return ret; | |
1086 | } | |
1087 | ||
1088 | int x_fstat(int fd, STRUCT_STAT *fst, STRUCT_STAT *xst) | |
1089 | { | |
1090 | int ret = do_fstat(fd, fst); | |
1091 | if ((ret < 0 || get_stat_xattr(NULL, fd, fst, xst) < 0) && xst) | |
1092 | xst->st_mode = 0; | |
1093 | return ret; | |
1094 | } | |
1095 | ||
16edf865 | 1096 | #endif /* SUPPORT_XATTRS */ |