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; |
6500e076 WD |
36 | extern int preserve_links; |
37 | extern int preserve_devices; | |
38 | extern int preserve_specials; | |
16edf865 WD |
39 | extern int checksum_seed; |
40 | ||
41 | #define RSYNC_XAL_INITIAL 5 | |
42 | #define RSYNC_XAL_LIST_INITIAL 100 | |
43 | ||
44 | #define MAX_FULL_DATUM 32 | |
45 | ||
46 | #define HAS_PREFIX(str, prfx) (*(str) == *(prfx) \ | |
47 | && strncmp(str, prfx, sizeof (prfx) - 1) == 0) | |
48 | ||
49 | #define XATTR_ABBREV(x) ((size_t)((x).name - (x).datum) < (x).datum_len) | |
50 | ||
6283e9ef WD |
51 | #define XSTATE_ABBREV 1 |
52 | #define XSTATE_DONE 2 | |
53 | #define XSTATE_TODO 3 | |
16edf865 WD |
54 | |
55 | #define USER_PREFIX "user." | |
56 | #define UPRE_LEN ((int)sizeof USER_PREFIX - 1) | |
57 | #define SYSTEM_PREFIX "system." | |
58 | #define SPRE_LEN ((int)sizeof SYSTEM_PREFIX - 1) | |
59 | ||
60 | #ifdef HAVE_LINUX_XATTRS | |
9439c0cb WD |
61 | #define MIGHT_NEED_RPRE (am_root < 0) |
62 | #define RSYNC_PREFIX USER_PREFIX "rsync." | |
16edf865 | 63 | #else |
9439c0cb | 64 | #define MIGHT_NEED_RPRE am_root |
16edf865 | 65 | #define RSYNC_PREFIX "rsync." |
16edf865 | 66 | #endif |
9439c0cb WD |
67 | #define RPRE_LEN ((int)sizeof RSYNC_PREFIX - 1) |
68 | ||
d724dd18 WD |
69 | #define XSTAT_SUFFIX "stat" |
70 | #define XSTAT_ATTR RSYNC_PREFIX "%" XSTAT_SUFFIX | |
71 | #define XACC_ACL_SUFFIX "aacl" | |
72 | #define XACC_ACL_ATTR RSYNC_PREFIX "%" XACC_ACL_SUFFIX | |
73 | #define XDEF_ACL_SUFFIX "dacl" | |
74 | #define XDEF_ACL_ATTR RSYNC_PREFIX "%" XDEF_ACL_SUFFIX | |
16edf865 WD |
75 | |
76 | typedef struct { | |
77 | char *datum, *name; | |
78 | size_t datum_len, name_len; | |
68ddbaf6 | 79 | int num; |
16edf865 WD |
80 | } rsync_xa; |
81 | ||
82 | static size_t namebuf_len = 0; | |
83 | static char *namebuf = NULL; | |
84 | ||
85 | static item_list empty_xattr = EMPTY_ITEM_LIST; | |
86 | static item_list rsync_xal_l = EMPTY_ITEM_LIST; | |
87 | ||
cb197514 WD |
88 | static size_t prior_xattr_count = (size_t)-1; |
89 | ||
16edf865 WD |
90 | /* ------------------------------------------------------------------------- */ |
91 | ||
92 | static void rsync_xal_free(item_list *xalp) | |
93 | { | |
94 | size_t i; | |
95 | rsync_xa *rxas = xalp->items; | |
96 | ||
97 | for (i = 0; i < xalp->count; i++) { | |
98 | free(rxas[i].datum); | |
99 | /*free(rxas[i].name);*/ | |
100 | } | |
101 | xalp->count = 0; | |
102 | } | |
103 | ||
13710874 | 104 | void free_xattr(stat_x *sxp) |
16edf865 WD |
105 | { |
106 | if (!sxp->xattr) | |
107 | return; | |
108 | rsync_xal_free(sxp->xattr); | |
109 | free(sxp->xattr); | |
110 | sxp->xattr = NULL; | |
111 | } | |
112 | ||
113 | static int rsync_xal_compare_names(const void *x1, const void *x2) | |
114 | { | |
115 | const rsync_xa *xa1 = x1; | |
116 | const rsync_xa *xa2 = x2; | |
117 | return strcmp(xa1->name, xa2->name); | |
118 | } | |
119 | ||
120 | static ssize_t get_xattr_names(const char *fname) | |
121 | { | |
122 | ssize_t list_len; | |
6d56efa6 | 123 | int64 arg; |
16edf865 WD |
124 | |
125 | if (!namebuf) { | |
126 | namebuf_len = 1024; | |
127 | namebuf = new_array(char, namebuf_len); | |
128 | if (!namebuf) | |
129 | out_of_memory("get_xattr_names"); | |
130 | } | |
131 | ||
71daa07f WD |
132 | while (1) { |
133 | /* The length returned includes all the '\0' terminators. */ | |
134 | list_len = sys_llistxattr(fname, namebuf, namebuf_len); | |
135 | if (list_len >= 0) { | |
136 | if ((size_t)list_len <= namebuf_len) | |
137 | break; | |
138 | } else if (errno == ENOTSUP) | |
139 | return 0; | |
140 | else if (errno != ERANGE) { | |
6d56efa6 | 141 | arg = namebuf_len; |
71daa07f | 142 | got_error: |
3f0211b6 | 143 | rsyserr(FERROR_XFER, errno, |
6d56efa6 | 144 | "get_xattr_names: llistxattr(\"%s\",%s) failed", |
14013906 | 145 | full_fname(fname), big_num(arg)); |
16edf865 WD |
146 | return -1; |
147 | } | |
71daa07f WD |
148 | list_len = sys_llistxattr(fname, NULL, 0); |
149 | if (list_len < 0) { | |
150 | arg = 0; | |
151 | goto got_error; | |
152 | } | |
16edf865 WD |
153 | if (namebuf_len) |
154 | free(namebuf); | |
155 | namebuf_len = list_len + 1024; | |
156 | namebuf = new_array(char, namebuf_len); | |
157 | if (!namebuf) | |
158 | out_of_memory("get_xattr_names"); | |
16edf865 WD |
159 | } |
160 | ||
71daa07f | 161 | return list_len; |
16edf865 WD |
162 | } |
163 | ||
164 | /* On entry, the *len_ptr parameter contains the size of the extra space we | |
165 | * should allocate when we create a buffer for the data. On exit, it contains | |
166 | * the length of the datum. */ | |
167 | static char *get_xattr_data(const char *fname, const char *name, size_t *len_ptr, | |
168 | int no_missing_error) | |
169 | { | |
170 | size_t datum_len = sys_lgetxattr(fname, name, NULL, 0); | |
41979f25 | 171 | size_t extra_len = *len_ptr; |
16edf865 WD |
172 | char *ptr; |
173 | ||
41979f25 WD |
174 | *len_ptr = datum_len; |
175 | ||
16edf865 WD |
176 | if (datum_len == (size_t)-1) { |
177 | if (errno == ENOTSUP || no_missing_error) | |
178 | return NULL; | |
3f0211b6 | 179 | rsyserr(FERROR_XFER, errno, |
16edf865 | 180 | "get_xattr_data: lgetxattr(\"%s\",\"%s\",0) failed", |
14013906 | 181 | full_fname(fname), name); |
16edf865 WD |
182 | return NULL; |
183 | } | |
184 | ||
41979f25 WD |
185 | if (!datum_len && !extra_len) |
186 | extra_len = 1; /* request non-zero amount of memory */ | |
774d1c36 WD |
187 | if (datum_len + extra_len < datum_len) |
188 | overflow_exit("get_xattr_data"); | |
189 | if (!(ptr = new_array(char, datum_len + extra_len))) | |
16edf865 WD |
190 | out_of_memory("get_xattr_data"); |
191 | ||
16edf865 WD |
192 | if (datum_len) { |
193 | size_t len = sys_lgetxattr(fname, name, ptr, datum_len); | |
194 | if (len != datum_len) { | |
195 | if (len == (size_t)-1) { | |
3f0211b6 | 196 | rsyserr(FERROR_XFER, errno, |
16edf865 | 197 | "get_xattr_data: lgetxattr(\"%s\",\"%s\",%ld)" |
14013906 | 198 | " failed", full_fname(fname), name, (long)datum_len); |
16edf865 | 199 | } else { |
3f0211b6 | 200 | rprintf(FERROR_XFER, |
16edf865 | 201 | "get_xattr_data: lgetxattr(\"%s\",\"%s\",%ld)" |
14013906 | 202 | " returned %ld\n", full_fname(fname), name, |
16edf865 WD |
203 | (long)datum_len, (long)len); |
204 | } | |
205 | free(ptr); | |
206 | return NULL; | |
207 | } | |
208 | } | |
209 | ||
210 | return ptr; | |
211 | } | |
212 | ||
213 | static int rsync_xal_get(const char *fname, item_list *xalp) | |
214 | { | |
215 | ssize_t list_len, name_len; | |
216 | size_t datum_len, name_offset; | |
217 | char *name, *ptr; | |
218 | #ifdef HAVE_LINUX_XATTRS | |
219 | int user_only = am_sender ? 0 : !am_root; | |
220 | #endif | |
68ddbaf6 WD |
221 | rsync_xa *rxa; |
222 | int count; | |
16edf865 WD |
223 | |
224 | /* This puts the name list into the "namebuf" buffer. */ | |
225 | if ((list_len = get_xattr_names(fname)) < 0) | |
226 | return -1; | |
227 | ||
228 | for (name = namebuf; list_len > 0; name += name_len) { | |
16edf865 WD |
229 | name_len = strlen(name) + 1; |
230 | list_len -= name_len; | |
231 | ||
232 | #ifdef HAVE_LINUX_XATTRS | |
233 | /* We always ignore the system namespace, and non-root | |
234 | * ignores everything but the user namespace. */ | |
235 | if (user_only ? !HAS_PREFIX(name, USER_PREFIX) | |
236 | : HAS_PREFIX(name, SYSTEM_PREFIX)) | |
237 | continue; | |
238 | #endif | |
239 | ||
524eaa82 | 240 | /* No rsync.%FOO attributes are copied w/o 2 -X options. */ |
a685271d WD |
241 | if (name_len > RPRE_LEN && name[RPRE_LEN] == '%' |
242 | && HAS_PREFIX(name, RSYNC_PREFIX)) { | |
243 | if ((am_sender && preserve_xattrs < 2) | |
d724dd18 WD |
244 | || (am_root < 0 |
245 | && (strcmp(name+RPRE_LEN+1, XSTAT_SUFFIX) == 0 | |
246 | || strcmp(name+RPRE_LEN+1, XACC_ACL_SUFFIX) == 0 | |
247 | || strcmp(name+RPRE_LEN+1, XDEF_ACL_SUFFIX) == 0))) | |
a685271d WD |
248 | continue; |
249 | } | |
9439c0cb | 250 | |
16edf865 WD |
251 | datum_len = name_len; /* Pass extra size to get_xattr_data() */ |
252 | if (!(ptr = get_xattr_data(fname, name, &datum_len, 0))) | |
253 | return -1; | |
254 | ||
255 | if (datum_len > MAX_FULL_DATUM) { | |
256 | /* For large datums, we store a flag and a checksum. */ | |
257 | name_offset = 1 + MAX_DIGEST_LEN; | |
258 | sum_init(checksum_seed); | |
259 | sum_update(ptr, datum_len); | |
260 | free(ptr); | |
261 | ||
262 | if (!(ptr = new_array(char, name_offset + name_len))) | |
263 | out_of_memory("rsync_xal_get"); | |
264 | *ptr = XSTATE_ABBREV; | |
265 | sum_end(ptr + 1); | |
266 | } else | |
267 | name_offset = datum_len; | |
268 | ||
a685271d WD |
269 | rxa = EXPAND_ITEM_LIST(xalp, rsync_xa, RSYNC_XAL_INITIAL); |
270 | rxa->name = ptr + name_offset; | |
271 | memcpy(rxa->name, name, name_len); | |
272 | rxa->datum = ptr; | |
273 | rxa->name_len = name_len; | |
274 | rxa->datum_len = datum_len; | |
16edf865 | 275 | } |
68ddbaf6 WD |
276 | count = xalp->count; |
277 | rxa = xalp->items; | |
278 | if (count > 1) | |
279 | qsort(rxa, count, sizeof (rsync_xa), rsync_xal_compare_names); | |
280 | for (rxa += count-1; count; count--, rxa--) | |
281 | rxa->num = count; | |
16edf865 WD |
282 | return 0; |
283 | } | |
284 | ||
285 | /* Read the xattr(s) for this filename. */ | |
13710874 | 286 | int get_xattr(const char *fname, stat_x *sxp) |
16edf865 WD |
287 | { |
288 | sxp->xattr = new(item_list); | |
289 | *sxp->xattr = empty_xattr; | |
0d5ebab1 | 290 | |
6500e076 WD |
291 | if (S_ISREG(sxp->st.st_mode) || S_ISDIR(sxp->st.st_mode)) { |
292 | /* Everyone supports this. */ | |
293 | } else if (S_ISLNK(sxp->st.st_mode)) { | |
294 | #ifndef NO_SYMLINK_XATTRS | |
295 | if (!preserve_links) | |
0d5ebab1 | 296 | #endif |
6500e076 WD |
297 | return 0; |
298 | } else if (IS_SPECIAL(sxp->st.st_mode)) { | |
299 | #ifndef NO_SPECIAL_XATTRS | |
300 | if (!preserve_specials) | |
0d5ebab1 | 301 | #endif |
6500e076 WD |
302 | return 0; |
303 | } else if (IS_DEVICE(sxp->st.st_mode)) { | |
304 | #ifndef NO_DEVICE_XATTRS | |
305 | if (!preserve_devices) | |
0d5ebab1 | 306 | #endif |
6500e076 WD |
307 | return 0; |
308 | } | |
0d5ebab1 | 309 | |
16edf865 WD |
310 | if (rsync_xal_get(fname, sxp->xattr) < 0) { |
311 | free_xattr(sxp); | |
312 | return -1; | |
313 | } | |
314 | return 0; | |
315 | } | |
316 | ||
e9489cd6 WD |
317 | int copy_xattrs(const char *source, const char *dest) |
318 | { | |
319 | ssize_t list_len, name_len; | |
320 | size_t datum_len; | |
321 | char *name, *ptr; | |
322 | #ifdef HAVE_LINUX_XATTRS | |
97dde6b6 | 323 | int user_only = am_sender ? 0 : am_root <= 0; |
e9489cd6 WD |
324 | #endif |
325 | ||
326 | /* This puts the name list into the "namebuf" buffer. */ | |
327 | if ((list_len = get_xattr_names(source)) < 0) | |
328 | return -1; | |
329 | ||
330 | for (name = namebuf; list_len > 0; name += name_len) { | |
331 | name_len = strlen(name) + 1; | |
332 | list_len -= name_len; | |
333 | ||
334 | #ifdef HAVE_LINUX_XATTRS | |
335 | /* We always ignore the system namespace, and non-root | |
336 | * ignores everything but the user namespace. */ | |
337 | if (user_only ? !HAS_PREFIX(name, USER_PREFIX) | |
338 | : HAS_PREFIX(name, SYSTEM_PREFIX)) | |
339 | continue; | |
340 | #endif | |
341 | ||
342 | datum_len = 0; | |
343 | if (!(ptr = get_xattr_data(source, name, &datum_len, 0))) | |
344 | return -1; | |
345 | if (sys_lsetxattr(dest, name, ptr, datum_len) < 0) { | |
346 | int save_errno = errno ? errno : EINVAL; | |
347 | rsyserr(FERROR_XFER, errno, | |
0f6b683c | 348 | "copy_xattrs: lsetxattr(\"%s\",\"%s\") failed", |
14013906 | 349 | full_fname(dest), name); |
e9489cd6 WD |
350 | errno = save_errno; |
351 | return -1; | |
352 | } | |
353 | free(ptr); | |
354 | } | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
16edf865 WD |
359 | static int find_matching_xattr(item_list *xalp) |
360 | { | |
361 | size_t i, j; | |
362 | item_list *lst = rsync_xal_l.items; | |
363 | ||
364 | for (i = 0; i < rsync_xal_l.count; i++) { | |
365 | rsync_xa *rxas1 = lst[i].items; | |
366 | rsync_xa *rxas2 = xalp->items; | |
367 | ||
368 | /* Wrong number of elements? */ | |
369 | if (lst[i].count != xalp->count) | |
370 | continue; | |
371 | /* any elements different? */ | |
372 | for (j = 0; j < xalp->count; j++) { | |
373 | if (rxas1[j].name_len != rxas2[j].name_len | |
374 | || rxas1[j].datum_len != rxas2[j].datum_len | |
375 | || strcmp(rxas1[j].name, rxas2[j].name)) | |
376 | break; | |
377 | if (rxas1[j].datum_len > MAX_FULL_DATUM) { | |
378 | if (memcmp(rxas1[j].datum + 1, | |
379 | rxas2[j].datum + 1, | |
380 | MAX_DIGEST_LEN) != 0) | |
381 | break; | |
382 | } else { | |
383 | if (memcmp(rxas1[j].datum, rxas2[j].datum, | |
384 | rxas2[j].datum_len)) | |
385 | break; | |
386 | } | |
387 | } | |
388 | /* no differences found. This is The One! */ | |
389 | if (j == xalp->count) | |
390 | return i; | |
391 | } | |
392 | ||
393 | return -1; | |
394 | } | |
395 | ||
396 | /* Store *xalp on the end of rsync_xal_l */ | |
397 | static void rsync_xal_store(item_list *xalp) | |
398 | { | |
399 | item_list *new_lst = EXPAND_ITEM_LIST(&rsync_xal_l, item_list, RSYNC_XAL_LIST_INITIAL); | |
400 | /* Since the following call starts a new list, we know it will hold the | |
401 | * entire initial-count, not just enough space for one new item. */ | |
402 | *new_lst = empty_xattr; | |
403 | (void)EXPAND_ITEM_LIST(new_lst, rsync_xa, xalp->count); | |
404 | memcpy(new_lst->items, xalp->items, xalp->count * sizeof (rsync_xa)); | |
405 | new_lst->count = xalp->count; | |
406 | xalp->count = 0; | |
407 | } | |
408 | ||
409 | /* Send the make_xattr()-generated xattr list for this flist entry. */ | |
1b502f3e | 410 | int send_xattr(int f, stat_x *sxp) |
16edf865 WD |
411 | { |
412 | int ndx = find_matching_xattr(sxp->xattr); | |
413 | ||
414 | /* Send 0 (-1 + 1) to indicate that literal xattr data follows. */ | |
f31514ad | 415 | write_varint(f, ndx + 1); |
16edf865 WD |
416 | |
417 | if (ndx < 0) { | |
418 | rsync_xa *rxa; | |
419 | int count = sxp->xattr->count; | |
f31514ad | 420 | write_varint(f, count); |
16edf865 | 421 | for (rxa = sxp->xattr->items; count--; rxa++) { |
b4e6aac9 | 422 | size_t name_len = rxa->name_len; |
d724dd18 WD |
423 | const char *name = rxa->name; |
424 | /* Strip the rsync prefix from disguised namespaces. */ | |
b4e6aac9 | 425 | if (name_len > RPRE_LEN |
16edf865 | 426 | #ifdef HAVE_LINUX_XATTRS |
b4e6aac9 | 427 | && am_root < 0 |
d724dd18 | 428 | #endif |
b4e6aac9 | 429 | && name[RPRE_LEN] != '%' && HAS_PREFIX(name, RSYNC_PREFIX)) { |
d724dd18 WD |
430 | name += RPRE_LEN; |
431 | name_len -= RPRE_LEN; | |
432 | } | |
433 | #ifndef HAVE_LINUX_XATTRS | |
434 | else { | |
435 | /* Put everything else in the user namespace. */ | |
436 | name_len += UPRE_LEN; | |
437 | } | |
438 | #endif | |
439 | write_varint(f, name_len); | |
f31514ad | 440 | write_varint(f, rxa->datum_len); |
d724dd18 WD |
441 | #ifndef HAVE_LINUX_XATTRS |
442 | if (name_len > rxa->name_len) { | |
16edf865 | 443 | write_buf(f, USER_PREFIX, UPRE_LEN); |
d724dd18 | 444 | name_len -= UPRE_LEN; |
16edf865 WD |
445 | } |
446 | #endif | |
d724dd18 | 447 | write_buf(f, name, name_len); |
16edf865 WD |
448 | if (rxa->datum_len > MAX_FULL_DATUM) |
449 | write_buf(f, rxa->datum + 1, MAX_DIGEST_LEN); | |
450 | else | |
451 | write_buf(f, rxa->datum, rxa->datum_len); | |
452 | } | |
453 | ndx = rsync_xal_l.count; /* pre-incremented count */ | |
454 | rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */ | |
455 | } | |
456 | ||
457 | return ndx; | |
458 | } | |
459 | ||
460 | /* Return a flag indicating if we need to change a file's xattrs. If | |
461 | * "find_all" is specified, also mark any abbreviated xattrs that we | |
462 | * need so that send_xattr_request() can tell the sender about them. */ | |
13710874 | 463 | int xattr_diff(struct file_struct *file, stat_x *sxp, int find_all) |
16edf865 WD |
464 | { |
465 | item_list *lst = rsync_xal_l.items; | |
466 | rsync_xa *snd_rxa, *rec_rxa; | |
467 | int snd_cnt, rec_cnt; | |
468 | int cmp, same, xattrs_equal = 1; | |
469 | ||
470 | if (sxp && XATTR_READY(*sxp)) { | |
471 | rec_rxa = sxp->xattr->items; | |
472 | rec_cnt = sxp->xattr->count; | |
473 | } else { | |
474 | rec_rxa = NULL; | |
475 | rec_cnt = 0; | |
476 | } | |
477 | ||
478 | if (F_XATTR(file) >= 0) | |
479 | lst += F_XATTR(file); | |
480 | else | |
481 | lst = &empty_xattr; | |
482 | ||
483 | snd_rxa = lst->items; | |
484 | snd_cnt = lst->count; | |
485 | ||
486 | /* If the count of the sender's xattrs is different from our | |
487 | * (receiver's) xattrs, the lists are not the same. */ | |
488 | if (snd_cnt != rec_cnt) { | |
489 | if (!find_all) | |
490 | return 1; | |
491 | xattrs_equal = 0; | |
492 | } | |
493 | ||
494 | while (snd_cnt) { | |
495 | cmp = rec_cnt ? strcmp(snd_rxa->name, rec_rxa->name) : -1; | |
496 | if (cmp > 0) | |
497 | same = 0; | |
498 | else if (snd_rxa->datum_len > MAX_FULL_DATUM) { | |
499 | same = cmp == 0 && snd_rxa->datum_len == rec_rxa->datum_len | |
500 | && memcmp(snd_rxa->datum + 1, rec_rxa->datum + 1, | |
501 | MAX_DIGEST_LEN) == 0; | |
502 | /* Flag unrequested items that we need. */ | |
503 | if (!same && find_all && snd_rxa->datum[0] == XSTATE_ABBREV) | |
504 | snd_rxa->datum[0] = XSTATE_TODO; | |
505 | } else { | |
506 | same = cmp == 0 && snd_rxa->datum_len == rec_rxa->datum_len | |
507 | && memcmp(snd_rxa->datum, rec_rxa->datum, | |
508 | snd_rxa->datum_len) == 0; | |
509 | } | |
510 | if (!same) { | |
511 | if (!find_all) | |
512 | return 1; | |
513 | xattrs_equal = 0; | |
514 | } | |
515 | ||
516 | if (cmp <= 0) { | |
517 | snd_rxa++; | |
518 | snd_cnt--; | |
519 | } | |
520 | if (cmp >= 0) { | |
521 | rec_rxa++; | |
522 | rec_cnt--; | |
523 | } | |
524 | } | |
525 | ||
526 | if (rec_cnt) | |
527 | xattrs_equal = 0; | |
528 | ||
529 | return !xattrs_equal; | |
530 | } | |
531 | ||
7462c6ac WD |
532 | /* When called by the generator (with a NULL fname), this tells the sender |
533 | * all the abbreviated xattr values we need. When called by the sender | |
534 | * (with a non-NULL fname), we send all the extra xattr data it needs. | |
535 | * The generator may also call with f_out < 0 to just change all the | |
536 | * XSTATE_ABBREV states into XSTATE_DONE. */ | |
16edf865 WD |
537 | void send_xattr_request(const char *fname, struct file_struct *file, int f_out) |
538 | { | |
539 | item_list *lst = rsync_xal_l.items; | |
68ddbaf6 | 540 | int cnt, prior_req = 0; |
16edf865 WD |
541 | rsync_xa *rxa; |
542 | ||
543 | lst += F_XATTR(file); | |
68ddbaf6 | 544 | for (rxa = lst->items, cnt = lst->count; cnt--; rxa++) { |
16edf865 WD |
545 | if (rxa->datum_len <= MAX_FULL_DATUM) |
546 | continue; | |
547 | switch (rxa->datum[0]) { | |
b769ad6a WD |
548 | case XSTATE_ABBREV: |
549 | /* Items left abbreviated matched the sender's checksum, so | |
550 | * the receiver will cache the local data for future use. */ | |
551 | if (am_generator) | |
552 | rxa->datum[0] = XSTATE_DONE; | |
16edf865 WD |
553 | continue; |
554 | case XSTATE_TODO: | |
7462c6ac | 555 | assert(f_out >= 0); |
16edf865 WD |
556 | break; |
557 | default: | |
558 | continue; | |
559 | } | |
560 | ||
561 | /* Flag that we handled this abbreviated item. */ | |
562 | rxa->datum[0] = XSTATE_DONE; | |
563 | ||
68ddbaf6 WD |
564 | write_varint(f_out, rxa->num - prior_req); |
565 | prior_req = rxa->num; | |
16edf865 WD |
566 | |
567 | if (fname) { | |
568 | size_t len = 0; | |
569 | char *ptr; | |
570 | ||
571 | /* Re-read the long datum. */ | |
a685271d WD |
572 | if (!(ptr = get_xattr_data(fname, rxa->name, &len, 0))) { |
573 | rprintf(FERROR_XFER, "failed to re-read xattr %s for %s\n", rxa->name, fname); | |
574 | write_varint(f_out, 0); | |
16edf865 | 575 | continue; |
a685271d | 576 | } |
16edf865 | 577 | |
f31514ad | 578 | write_varint(f_out, len); /* length might have changed! */ |
16edf865 WD |
579 | write_buf(f_out, ptr, len); |
580 | free(ptr); | |
581 | } | |
582 | } | |
583 | ||
7462c6ac WD |
584 | if (f_out >= 0) |
585 | write_byte(f_out, 0); /* end the list */ | |
16edf865 WD |
586 | } |
587 | ||
16edf865 WD |
588 | /* When called by the sender, read the request from the generator and mark |
589 | * any needed xattrs with a flag that lets us know they need to be sent to | |
590 | * the receiver. When called by the receiver, reads the sent data and | |
591 | * stores it in place of its checksum. */ | |
e107b6b1 | 592 | int recv_xattr_request(struct file_struct *file, int f_in) |
16edf865 WD |
593 | { |
594 | item_list *lst = rsync_xal_l.items; | |
595 | char *old_datum, *name; | |
596 | rsync_xa *rxa; | |
68ddbaf6 | 597 | int rel_pos, cnt, num, got_xattr_data = 0; |
16edf865 WD |
598 | |
599 | if (F_XATTR(file) < 0) { | |
600 | rprintf(FERROR, "recv_xattr_request: internal data error!\n"); | |
e4c598c8 | 601 | exit_cleanup(RERR_PROTOCOL); |
16edf865 WD |
602 | } |
603 | lst += F_XATTR(file); | |
604 | ||
605 | cnt = lst->count; | |
606 | rxa = lst->items; | |
68ddbaf6 | 607 | num = 0; |
f31514ad | 608 | while ((rel_pos = read_varint(f_in)) != 0) { |
68ddbaf6 WD |
609 | num += rel_pos; |
610 | while (cnt && rxa->num < num) { | |
611 | rxa++; | |
612 | cnt--; | |
613 | } | |
614 | if (!cnt || rxa->num != num) { | |
615 | rprintf(FERROR, "[%s] could not find xattr #%d for %s\n", | |
616 | who_am_i(), num, f_name(file, NULL)); | |
e4c598c8 | 617 | exit_cleanup(RERR_PROTOCOL); |
68ddbaf6 | 618 | } |
6283e9ef | 619 | if (!XATTR_ABBREV(*rxa) || rxa->datum[0] != XSTATE_ABBREV) { |
e424e261 WD |
620 | rprintf(FERROR, "[%s] internal abbrev error on %s (%s, len=%ld)!\n", |
621 | who_am_i(), f_name(file, NULL), rxa->name, (long)rxa->datum_len); | |
e4c598c8 | 622 | exit_cleanup(RERR_PROTOCOL); |
16edf865 WD |
623 | } |
624 | ||
625 | if (am_sender) { | |
626 | rxa->datum[0] = XSTATE_TODO; | |
627 | continue; | |
628 | } | |
629 | ||
630 | old_datum = rxa->datum; | |
f31514ad | 631 | rxa->datum_len = read_varint(f_in); |
16edf865 WD |
632 | |
633 | if (rxa->name_len + rxa->datum_len < rxa->name_len) | |
774d1c36 | 634 | overflow_exit("recv_xattr_request"); |
16edf865 WD |
635 | rxa->datum = new_array(char, rxa->datum_len + rxa->name_len); |
636 | if (!rxa->datum) | |
637 | out_of_memory("recv_xattr_request"); | |
638 | name = rxa->datum + rxa->datum_len; | |
639 | memcpy(name, rxa->name, rxa->name_len); | |
640 | rxa->name = name; | |
641 | free(old_datum); | |
642 | read_buf(f_in, rxa->datum, rxa->datum_len); | |
e107b6b1 | 643 | got_xattr_data = 1; |
16edf865 | 644 | } |
e107b6b1 WD |
645 | |
646 | return got_xattr_data; | |
16edf865 WD |
647 | } |
648 | ||
649 | /* ------------------------------------------------------------------------- */ | |
650 | ||
651 | /* receive and build the rsync_xattr_lists */ | |
1b502f3e | 652 | void receive_xattr(int f, struct file_struct *file) |
16edf865 WD |
653 | { |
654 | static item_list temp_xattr = EMPTY_ITEM_LIST; | |
68ddbaf6 | 655 | int count, num; |
d724dd18 WD |
656 | #ifdef HAVE_LINUX_XATTRS |
657 | int need_sort = 0; | |
658 | #else | |
659 | int need_sort = 1; | |
660 | #endif | |
f31514ad | 661 | int ndx = read_varint(f); |
16edf865 WD |
662 | |
663 | if (ndx < 0 || (size_t)ndx > rsync_xal_l.count) { | |
664 | rprintf(FERROR, "receive_xattr: xa index %d out of" | |
665 | " range for %s\n", ndx, f_name(file, NULL)); | |
666 | exit_cleanup(RERR_STREAMIO); | |
667 | } | |
668 | ||
669 | if (ndx != 0) { | |
670 | F_XATTR(file) = ndx - 1; | |
671 | return; | |
672 | } | |
0f6b683c | 673 | |
f31514ad | 674 | if ((count = read_varint(f)) != 0) { |
16edf865 WD |
675 | (void)EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, count); |
676 | temp_xattr.count = 0; | |
677 | } | |
678 | ||
68ddbaf6 | 679 | for (num = 1; num <= count; num++) { |
16edf865 WD |
680 | char *ptr, *name; |
681 | rsync_xa *rxa; | |
f31514ad WD |
682 | size_t name_len = read_varint(f); |
683 | size_t datum_len = read_varint(f); | |
16edf865 | 684 | size_t dget_len = datum_len > MAX_FULL_DATUM ? 1 + MAX_DIGEST_LEN : datum_len; |
9439c0cb | 685 | size_t extra_len = MIGHT_NEED_RPRE ? RPRE_LEN : 0; |
774d1c36 WD |
686 | if ((dget_len + extra_len < dget_len) |
687 | || (dget_len + extra_len + name_len < dget_len)) | |
688 | overflow_exit("receive_xattr"); | |
16edf865 WD |
689 | ptr = new_array(char, dget_len + extra_len + name_len); |
690 | if (!ptr) | |
691 | out_of_memory("receive_xattr"); | |
692 | name = ptr + dget_len + extra_len; | |
693 | read_buf(f, name, name_len); | |
694 | if (dget_len == datum_len) | |
695 | read_buf(f, ptr, dget_len); | |
696 | else { | |
697 | *ptr = XSTATE_ABBREV; | |
698 | read_buf(f, ptr + 1, MAX_DIGEST_LEN); | |
699 | } | |
700 | #ifdef HAVE_LINUX_XATTRS | |
701 | /* Non-root can only save the user namespace. */ | |
68ddbaf6 WD |
702 | if (am_root <= 0 && !HAS_PREFIX(name, USER_PREFIX)) { |
703 | if (!am_root) { | |
704 | free(ptr); | |
705 | continue; | |
706 | } | |
707 | name -= RPRE_LEN; | |
708 | name_len += RPRE_LEN; | |
709 | memcpy(name, RSYNC_PREFIX, RPRE_LEN); | |
d724dd18 | 710 | need_sort = 1; |
16edf865 WD |
711 | } |
712 | #else | |
713 | /* This OS only has a user namespace, so we either | |
714 | * strip the user prefix, or we put a non-user | |
715 | * namespace inside our rsync hierarchy. */ | |
716 | if (HAS_PREFIX(name, USER_PREFIX)) { | |
717 | name += UPRE_LEN; | |
718 | name_len -= UPRE_LEN; | |
719 | } else if (am_root) { | |
720 | name -= RPRE_LEN; | |
721 | name_len += RPRE_LEN; | |
722 | memcpy(name, RSYNC_PREFIX, RPRE_LEN); | |
723 | } else { | |
724 | free(ptr); | |
725 | continue; | |
726 | } | |
727 | #endif | |
524eaa82 WD |
728 | /* No rsync.%FOO attributes are copied w/o 2 -X options. */ |
729 | if (preserve_xattrs < 2 && name_len > RPRE_LEN | |
730 | && name[RPRE_LEN] == '%' && HAS_PREFIX(name, RSYNC_PREFIX)) { | |
9439c0cb WD |
731 | free(ptr); |
732 | continue; | |
733 | } | |
16edf865 WD |
734 | rxa = EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, 1); |
735 | rxa->name = name; | |
736 | rxa->datum = ptr; | |
737 | rxa->name_len = name_len; | |
738 | rxa->datum_len = datum_len; | |
68ddbaf6 | 739 | rxa->num = num; |
16edf865 WD |
740 | } |
741 | ||
d724dd18 WD |
742 | if (need_sort && count > 1) |
743 | qsort(temp_xattr.items, count, sizeof (rsync_xa), rsync_xal_compare_names); | |
744 | ||
16edf865 WD |
745 | ndx = rsync_xal_l.count; /* pre-incremented count */ |
746 | rsync_xal_store(&temp_xattr); /* adds item to rsync_xal_l */ | |
747 | ||
748 | F_XATTR(file) = ndx; | |
749 | } | |
750 | ||
13710874 | 751 | /* Turn the xattr data in stat_x into cached xattr data, setting the index |
16edf865 | 752 | * values in the file struct. */ |
cb197514 | 753 | void cache_tmp_xattr(struct file_struct *file, stat_x *sxp) |
16edf865 WD |
754 | { |
755 | int ndx; | |
756 | ||
757 | if (!sxp->xattr) | |
758 | return; | |
759 | ||
cb197514 WD |
760 | if (prior_xattr_count == (size_t)-1) |
761 | prior_xattr_count = rsync_xal_l.count; | |
16edf865 WD |
762 | ndx = find_matching_xattr(sxp->xattr); |
763 | if (ndx < 0) | |
764 | rsync_xal_store(sxp->xattr); /* adds item to rsync_xal_l */ | |
765 | ||
766 | F_XATTR(file) = ndx; | |
767 | } | |
768 | ||
cb197514 WD |
769 | void uncache_tmp_xattrs(void) |
770 | { | |
771 | if (prior_xattr_count != (size_t)-1) { | |
772 | item_list *xattr_item = rsync_xal_l.items; | |
773 | item_list *xattr_start = xattr_item + prior_xattr_count; | |
774 | xattr_item += rsync_xal_l.count; | |
775 | rsync_xal_l.count = prior_xattr_count; | |
776 | while (xattr_item-- > xattr_start) { | |
777 | rsync_xal_free(xattr_item); | |
4c3e9c09 | 778 | free(xattr_item->items); |
cb197514 WD |
779 | } |
780 | prior_xattr_count = (size_t)-1; | |
781 | } | |
782 | } | |
783 | ||
16edf865 | 784 | static int rsync_xal_set(const char *fname, item_list *xalp, |
13710874 | 785 | const char *fnamecmp, stat_x *sxp) |
16edf865 WD |
786 | { |
787 | rsync_xa *rxas = xalp->items; | |
788 | ssize_t list_len; | |
789 | size_t i, len; | |
790 | char *name, *ptr, sum[MAX_DIGEST_LEN]; | |
97dde6b6 WD |
791 | #ifdef HAVE_LINUX_XATTRS |
792 | int user_only = am_root <= 0; | |
793 | #endif | |
b4e6aac9 WD |
794 | size_t name_len; |
795 | int ret = 0; | |
16edf865 WD |
796 | |
797 | /* This puts the current name list into the "namebuf" buffer. */ | |
798 | if ((list_len = get_xattr_names(fname)) < 0) | |
799 | return -1; | |
800 | ||
801 | for (i = 0; i < xalp->count; i++) { | |
802 | name = rxas[i].name; | |
803 | ||
804 | if (XATTR_ABBREV(rxas[i])) { | |
805 | /* See if the fnamecmp version is identical. */ | |
806 | len = name_len = rxas[i].name_len; | |
807 | if ((ptr = get_xattr_data(fnamecmp, name, &len, 1)) == NULL) { | |
808 | still_abbrev: | |
809 | if (am_generator) | |
810 | continue; | |
811 | rprintf(FERROR, "Missing abbreviated xattr value, %s, for %s\n", | |
812 | rxas[i].name, full_fname(fname)); | |
813 | ret = -1; | |
814 | continue; | |
815 | } | |
816 | if (len != rxas[i].datum_len) { | |
817 | free(ptr); | |
818 | goto still_abbrev; | |
819 | } | |
820 | ||
821 | sum_init(checksum_seed); | |
822 | sum_update(ptr, len); | |
823 | sum_end(sum); | |
824 | if (memcmp(sum, rxas[i].datum + 1, MAX_DIGEST_LEN) != 0) { | |
825 | free(ptr); | |
826 | goto still_abbrev; | |
827 | } | |
828 | ||
829 | if (fname == fnamecmp) | |
830 | ; /* Value is already set when identical */ | |
831 | else if (sys_lsetxattr(fname, name, ptr, len) < 0) { | |
3f0211b6 | 832 | rsyserr(FERROR_XFER, errno, |
16edf865 | 833 | "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed", |
14013906 | 834 | full_fname(fname), name); |
16edf865 WD |
835 | ret = -1; |
836 | } else /* make sure caller sets mtime */ | |
837 | sxp->st.st_mtime = (time_t)-1; | |
838 | ||
839 | if (am_generator) { /* generator items stay abbreviated */ | |
16edf865 WD |
840 | free(ptr); |
841 | continue; | |
842 | } | |
843 | ||
844 | memcpy(ptr + len, name, name_len); | |
845 | free(rxas[i].datum); | |
846 | ||
847 | rxas[i].name = name = ptr + len; | |
848 | rxas[i].datum = ptr; | |
849 | continue; | |
850 | } | |
851 | ||
852 | if (sys_lsetxattr(fname, name, rxas[i].datum, rxas[i].datum_len) < 0) { | |
3f0211b6 | 853 | rsyserr(FERROR_XFER, errno, |
16edf865 | 854 | "rsync_xal_set: lsetxattr(\"%s\",\"%s\") failed", |
14013906 | 855 | full_fname(fname), name); |
16edf865 WD |
856 | ret = -1; |
857 | } else /* make sure caller sets mtime */ | |
858 | sxp->st.st_mtime = (time_t)-1; | |
859 | } | |
860 | ||
861 | /* Remove any extraneous names. */ | |
862 | for (name = namebuf; list_len > 0; name += name_len) { | |
863 | name_len = strlen(name) + 1; | |
864 | list_len -= name_len; | |
865 | ||
866 | #ifdef HAVE_LINUX_XATTRS | |
867 | /* We always ignore the system namespace, and non-root | |
868 | * ignores everything but the user namespace. */ | |
97dde6b6 WD |
869 | if (user_only ? !HAS_PREFIX(name, USER_PREFIX) |
870 | : HAS_PREFIX(name, SYSTEM_PREFIX)) | |
16edf865 WD |
871 | continue; |
872 | #endif | |
e107b6b1 WD |
873 | if (am_root < 0 && name_len > RPRE_LEN |
874 | && name[RPRE_LEN] == '%' && strcmp(name, XSTAT_ATTR) == 0) | |
875 | continue; | |
16edf865 WD |
876 | |
877 | for (i = 0; i < xalp->count; i++) { | |
878 | if (strcmp(name, rxas[i].name) == 0) | |
879 | break; | |
880 | } | |
881 | if (i == xalp->count) { | |
882 | if (sys_lremovexattr(fname, name) < 0) { | |
3f0211b6 | 883 | rsyserr(FERROR_XFER, errno, |
9cb20c60 | 884 | "rsync_xal_set: lremovexattr(\"%s\",\"%s\") failed", |
14013906 | 885 | full_fname(fname), name); |
16edf865 WD |
886 | ret = -1; |
887 | } else /* make sure caller sets mtime */ | |
888 | sxp->st.st_mtime = (time_t)-1; | |
889 | } | |
890 | } | |
891 | ||
892 | return ret; | |
893 | } | |
894 | ||
895 | /* Set extended attributes on indicated filename. */ | |
896 | int set_xattr(const char *fname, const struct file_struct *file, | |
13710874 | 897 | const char *fnamecmp, stat_x *sxp) |
16edf865 WD |
898 | { |
899 | int ndx; | |
900 | item_list *lst = rsync_xal_l.items; | |
901 | ||
902 | if (dry_run) | |
903 | return 1; /* FIXME: --dry-run needs to compute this value */ | |
904 | ||
905 | if (read_only || list_only) { | |
906 | errno = EROFS; | |
907 | return -1; | |
908 | } | |
909 | ||
0d5ebab1 WD |
910 | #ifdef NO_SPECIAL_XATTRS |
911 | if (IS_SPECIAL(sxp->st.st_mode)) { | |
912 | errno = ENOTSUP; | |
913 | return -1; | |
914 | } | |
915 | #endif | |
916 | #ifdef NO_DEVICE_XATTRS | |
917 | if (IS_DEVICE(sxp->st.st_mode)) { | |
918 | errno = ENOTSUP; | |
919 | return -1; | |
920 | } | |
921 | #endif | |
922 | #ifdef NO_SYMLINK_XATTRS | |
923 | if (S_ISLNK(sxp->st.st_mode)) { | |
924 | errno = ENOTSUP; | |
925 | return -1; | |
926 | } | |
927 | #endif | |
928 | ||
16edf865 WD |
929 | ndx = F_XATTR(file); |
930 | return rsync_xal_set(fname, lst + ndx, fnamecmp, sxp); | |
931 | } | |
932 | ||
7ed6bc53 WD |
933 | #ifdef SUPPORT_ACLS |
934 | char *get_xattr_acl(const char *fname, int is_access_acl, size_t *len_p) | |
935 | { | |
936 | const char *name = is_access_acl ? XACC_ACL_ATTR : XDEF_ACL_ATTR; | |
e516b69e | 937 | *len_p = 0; /* no extra data alloc needed from get_xattr_data() */ |
7ed6bc53 WD |
938 | return get_xattr_data(fname, name, len_p, 1); |
939 | } | |
940 | ||
941 | int set_xattr_acl(const char *fname, int is_access_acl, const char *buf, size_t buf_len) | |
942 | { | |
943 | const char *name = is_access_acl ? XACC_ACL_ATTR : XDEF_ACL_ATTR; | |
944 | if (sys_lsetxattr(fname, name, buf, buf_len) < 0) { | |
3f0211b6 | 945 | rsyserr(FERROR_XFER, errno, |
7ed6bc53 | 946 | "set_xattr_acl: lsetxattr(\"%s\",\"%s\") failed", |
14013906 | 947 | full_fname(fname), name); |
7ed6bc53 WD |
948 | return -1; |
949 | } | |
950 | return 0; | |
951 | } | |
952 | ||
953 | int del_def_xattr_acl(const char *fname) | |
954 | { | |
955 | return sys_lremovexattr(fname, XDEF_ACL_ATTR); | |
956 | } | |
957 | #endif | |
958 | ||
9439c0cb WD |
959 | int get_stat_xattr(const char *fname, int fd, STRUCT_STAT *fst, STRUCT_STAT *xst) |
960 | { | |
961 | int mode, rdev_major, rdev_minor, uid, gid, len; | |
962 | char buf[256]; | |
963 | ||
964 | if (am_root >= 0 || IS_DEVICE(fst->st_mode) || IS_SPECIAL(fst->st_mode)) | |
965 | return -1; | |
966 | ||
967 | if (xst) | |
968 | *xst = *fst; | |
969 | else | |
970 | xst = fst; | |
971 | if (fname) { | |
972 | fd = -1; | |
973 | len = sys_lgetxattr(fname, XSTAT_ATTR, buf, sizeof buf - 1); | |
974 | } else { | |
975 | fname = "fd"; | |
976 | len = sys_fgetxattr(fd, XSTAT_ATTR, buf, sizeof buf - 1); | |
977 | } | |
978 | if (len >= (int)sizeof buf) { | |
979 | len = -1; | |
980 | errno = ERANGE; | |
981 | } | |
982 | if (len < 0) { | |
983 | if (errno == ENOTSUP || errno == ENOATTR) | |
984 | return -1; | |
985 | if (errno == EPERM && S_ISLNK(fst->st_mode)) { | |
986 | xst->st_uid = 0; | |
987 | xst->st_gid = 0; | |
988 | return 0; | |
989 | } | |
3f0211b6 | 990 | rsyserr(FERROR_XFER, errno, "failed to read xattr %s for %s", |
9439c0cb WD |
991 | XSTAT_ATTR, full_fname(fname)); |
992 | return -1; | |
993 | } | |
994 | buf[len] = '\0'; | |
995 | ||
996 | if (sscanf(buf, "%o %d,%d %d:%d", | |
997 | &mode, &rdev_major, &rdev_minor, &uid, &gid) != 5) { | |
998 | rprintf(FERROR, "Corrupt %s xattr attached to %s: \"%s\"\n", | |
999 | XSTAT_ATTR, full_fname(fname), buf); | |
1000 | exit_cleanup(RERR_FILEIO); | |
1001 | } | |
1002 | ||
1003 | xst->st_mode = from_wire_mode(mode); | |
1004 | xst->st_rdev = MAKEDEV(rdev_major, rdev_minor); | |
1005 | xst->st_uid = uid; | |
1006 | xst->st_gid = gid; | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
e107b6b1 | 1011 | int set_stat_xattr(const char *fname, struct file_struct *file, mode_t new_mode) |
9439c0cb WD |
1012 | { |
1013 | STRUCT_STAT fst, xst; | |
1014 | dev_t rdev; | |
1015 | mode_t mode, fmode; | |
1016 | ||
1017 | if (dry_run) | |
1018 | return 0; | |
1019 | ||
1020 | if (read_only || list_only) { | |
3f0211b6 | 1021 | rsyserr(FERROR_XFER, EROFS, "failed to write xattr %s for %s", |
9439c0cb WD |
1022 | XSTAT_ATTR, full_fname(fname)); |
1023 | return -1; | |
1024 | } | |
1025 | ||
1026 | if (x_lstat(fname, &fst, &xst) < 0) { | |
3f0211b6 | 1027 | rsyserr(FERROR_XFER, errno, "failed to re-stat %s", |
9439c0cb WD |
1028 | full_fname(fname)); |
1029 | return -1; | |
1030 | } | |
1031 | ||
1032 | fst.st_mode &= (_S_IFMT | CHMOD_BITS); | |
e107b6b1 | 1033 | fmode = new_mode & (_S_IFMT | CHMOD_BITS); |
9439c0cb | 1034 | |
a8e6e148 | 1035 | if (IS_DEVICE(fmode)) { |
9439c0cb WD |
1036 | uint32 *devp = F_RDEV_P(file); |
1037 | rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)); | |
1038 | } else | |
1039 | rdev = 0; | |
1040 | ||
1041 | /* Dump the special permissions and enable full owner access. */ | |
1042 | mode = (fst.st_mode & _S_IFMT) | (fmode & ACCESSPERMS) | |
1043 | | (S_ISDIR(fst.st_mode) ? 0700 : 0600); | |
1044 | if (fst.st_mode != mode) | |
1045 | do_chmod(fname, mode); | |
a8e6e148 | 1046 | if (!IS_DEVICE(fst.st_mode)) |
9439c0cb WD |
1047 | fst.st_rdev = 0; /* just in case */ |
1048 | ||
1049 | if (mode == fmode && fst.st_rdev == rdev | |
fb7b9ddc | 1050 | && fst.st_uid == F_OWNER(file) && fst.st_gid == F_GROUP(file)) { |
9439c0cb WD |
1051 | /* xst.st_mode will be 0 if there's no current stat xattr */ |
1052 | if (xst.st_mode && sys_lremovexattr(fname, XSTAT_ATTR) < 0) { | |
3f0211b6 | 1053 | rsyserr(FERROR_XFER, errno, |
9439c0cb WD |
1054 | "delete of stat xattr failed for %s", |
1055 | full_fname(fname)); | |
1056 | return -1; | |
1057 | } | |
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | if (xst.st_mode != fmode || xst.st_rdev != rdev | |
fb7b9ddc | 1062 | || xst.st_uid != F_OWNER(file) || xst.st_gid != F_GROUP(file)) { |
9439c0cb WD |
1063 | char buf[256]; |
1064 | int len = snprintf(buf, sizeof buf, "%o %u,%u %u:%u", | |
1065 | to_wire_mode(fmode), | |
1066 | (int)major(rdev), (int)minor(rdev), | |
fb7b9ddc | 1067 | F_OWNER(file), F_GROUP(file)); |
9439c0cb WD |
1068 | if (sys_lsetxattr(fname, XSTAT_ATTR, buf, len) < 0) { |
1069 | if (errno == EPERM && S_ISLNK(fst.st_mode)) | |
1070 | return 0; | |
3f0211b6 | 1071 | rsyserr(FERROR_XFER, errno, |
9439c0cb WD |
1072 | "failed to write xattr %s for %s", |
1073 | XSTAT_ATTR, full_fname(fname)); | |
1074 | return -1; | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | return 0; | |
1079 | } | |
1080 | ||
1081 | int x_stat(const char *fname, STRUCT_STAT *fst, STRUCT_STAT *xst) | |
1082 | { | |
1083 | int ret = do_stat(fname, fst); | |
1084 | if ((ret < 0 || get_stat_xattr(fname, -1, fst, xst) < 0) && xst) | |
1085 | xst->st_mode = 0; | |
1086 | return ret; | |
1087 | } | |
1088 | ||
1089 | int x_lstat(const char *fname, STRUCT_STAT *fst, STRUCT_STAT *xst) | |
1090 | { | |
1091 | int ret = do_lstat(fname, fst); | |
1092 | if ((ret < 0 || get_stat_xattr(fname, -1, fst, xst) < 0) && xst) | |
1093 | xst->st_mode = 0; | |
1094 | return ret; | |
1095 | } | |
1096 | ||
1097 | int x_fstat(int fd, STRUCT_STAT *fst, STRUCT_STAT *xst) | |
1098 | { | |
1099 | int ret = do_fstat(fd, fst); | |
1100 | if ((ret < 0 || get_stat_xattr(NULL, fd, fst, xst) < 0) && xst) | |
1101 | xst->st_mode = 0; | |
1102 | return ret; | |
1103 | } | |
1104 | ||
16edf865 | 1105 | #endif /* SUPPORT_XATTRS */ |