Commit | Line | Data |
---|---|---|
6aae748e | 1 | /* |
0f78b815 WD |
2 | * Routines to support hard-linking. |
3 | * | |
4 | * Copyright (C) 1996 Andrew Tridgell | |
5 | * Copyright (C) 1996 Paul Mackerras | |
6 | * Copyright (C) 2002 Martin Pool <mbp@samba.org> | |
7 | * Copyright (C) 2004, 2005, 2006 Wayne Davison | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
e7c67065 WD |
19 | * You should have received a copy of the GNU General Public License along |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. | |
0f78b815 | 22 | */ |
dc5ddbcc AT |
23 | |
24 | #include "rsync.h" | |
25 | ||
9a52223b | 26 | extern int verbose; |
82ad07c4 | 27 | extern int dry_run; |
841d9436 | 28 | extern int do_xfers; |
541b23d1 | 29 | extern int link_dest; |
417c99f6 | 30 | extern int make_backups; |
47c11975 | 31 | extern int remove_source_files; |
20f90d5e | 32 | extern int stdout_format_has_i; |
541b23d1 | 33 | extern char *basis_dir[]; |
9f2e3c3f | 34 | extern struct file_list *the_file_list; |
dc5ddbcc | 35 | |
4f5b0756 | 36 | #ifdef SUPPORT_HARD_LINKS |
9f2e3c3f | 37 | |
3cd5301f WD |
38 | #define SKIPPED_LINK (-1) |
39 | #define FINISHED_LINK (-2) | |
40 | ||
9f2e3c3f | 41 | #define FPTR(i) (the_file_list->files[i]) |
82ad07c4 | 42 | #define LINKED(i1,i2) ((i1)->dev == (i2)->dev && (i1)->ino == (i2)->ino) |
9f2e3c3f WD |
43 | |
44 | static int hlink_compare(int *int1, int *int2) | |
dc5ddbcc | 45 | { |
9f2e3c3f WD |
46 | struct file_struct *f1 = FPTR(*int1); |
47 | struct file_struct *f2 = FPTR(*int2); | |
82ad07c4 WD |
48 | struct idev *i1 = F_IDEV(f1); |
49 | struct idev *i2 = F_IDEV(f2); | |
11dc2740 | 50 | |
82ad07c4 | 51 | if (i1->dev != i2->dev) |
663b2857 | 52 | return i1->dev > i2->dev ? 1 : -1; |
dc5ddbcc | 53 | |
82ad07c4 | 54 | if (i1->ino != i2->ino) |
663b2857 | 55 | return i1->ino > i2->ino ? 1 : -1; |
dc5ddbcc | 56 | |
122d1771 | 57 | return f_name_cmp(f1, f2); |
11dc2740 | 58 | } |
dc5ddbcc | 59 | |
1a05de2b WD |
60 | static int32 *hlink_list; |
61 | static int32 hlink_count; | |
1d5cda22 | 62 | |
1d5cda22 | 63 | /* Analyze the data in the hlink_list[], remove items that aren't multiply |
90481755 | 64 | * linked, and replace the dev+inode data with the hlindex+next linked list. */ |
9f2e3c3f | 65 | static void link_idev_data(void) |
1d5cda22 | 66 | { |
82ad07c4 WD |
67 | int32 from, to, start; |
68 | struct file_struct *file, *file_next; | |
69 | struct idev *idev, *idev_next; | |
70 | struct hlist *hl; | |
1d5cda22 | 71 | |
9935066b | 72 | alloc_pool_t hlink_pool; |
9f2e3c3f | 73 | alloc_pool_t idev_pool = the_file_list->hlink_pool; |
9935066b | 74 | |
82ad07c4 | 75 | hlink_pool = pool_create(128 * 1024, sizeof (struct hlist), out_of_memory, POOL_INTERN); |
9935066b | 76 | |
1d5cda22 WD |
77 | for (from = to = 0; from < hlink_count; from++) { |
78 | start = from; | |
82ad07c4 WD |
79 | for (file = FPTR(hlink_list[from]), idev = F_IDEV(file); |
80 | from < hlink_count-1; | |
81 | file = file_next, idev = idev_next) | |
82 | { | |
83 | file_next = FPTR(hlink_list[from+1]); | |
84 | idev_next = F_IDEV(file_next); | |
85 | if (!LINKED(idev, idev_next)) | |
97e786c3 | 86 | break; |
82ad07c4 WD |
87 | pool_free(idev_pool, 0, idev); |
88 | hl = pool_talloc(hlink_pool, struct hlist, 1, | |
89 | "hlink_list"); | |
90 | hl->hlindex = to; | |
91 | hl->next = hlink_list[++from]; | |
92 | hl->dest_used = 0; | |
93 | F_HLIST(file) = hl; | |
1d5cda22 | 94 | } |
82ad07c4 | 95 | pool_free(idev_pool, 0, idev); |
1d5cda22 | 96 | if (from > start) { |
97e786c3 | 97 | int head = hlink_list[start]; |
82ad07c4 WD |
98 | hl = pool_talloc(hlink_pool, struct hlist, 1, |
99 | "hlink_list"); | |
100 | FPTR(head)->flags |= FLAG_HLINK_FIRST; | |
101 | hl->hlindex = to; | |
102 | hl->next = head; | |
103 | hl->dest_used = 0; | |
1d5cda22 | 104 | hlink_list[to++] = head; |
82ad07c4 WD |
105 | file->flags |= FLAG_HLINK_LAST; |
106 | F_HLIST(file) = hl; | |
97e786c3 | 107 | } else |
112d728f | 108 | file->flags &= ~FLAG_HLINKED; |
1d5cda22 WD |
109 | } |
110 | ||
111 | if (!to) { | |
112 | free(hlink_list); | |
113 | hlink_list = NULL; | |
9935066b S |
114 | pool_destroy(hlink_pool); |
115 | hlink_pool = NULL; | |
1d5cda22 WD |
116 | } else { |
117 | hlink_count = to; | |
1a05de2b | 118 | hlink_list = realloc_array(hlink_list, int32, hlink_count); |
9f2e3c3f | 119 | if (!hlink_list) |
1d5cda22 WD |
120 | out_of_memory("init_hard_links"); |
121 | } | |
9f2e3c3f | 122 | the_file_list->hlink_pool = hlink_pool; |
9935066b | 123 | pool_destroy(idev_pool); |
1d5cda22 | 124 | } |
dc5ddbcc AT |
125 | #endif |
126 | ||
9f2e3c3f | 127 | void init_hard_links(void) |
dc5ddbcc | 128 | { |
4f5b0756 | 129 | #ifdef SUPPORT_HARD_LINKS |
dd04a034 | 130 | int i; |
11dc2740 | 131 | |
6e69cff1 MP |
132 | if (hlink_list) |
133 | free(hlink_list); | |
134 | ||
1a05de2b | 135 | if (!(hlink_list = new_array(int32, the_file_list->count))) |
dd04a034 | 136 | out_of_memory("init_hard_links"); |
6aae748e | 137 | |
11dc2740 | 138 | hlink_count = 0; |
9f2e3c3f | 139 | for (i = 0; i < the_file_list->count; i++) { |
112d728f | 140 | if (F_IS_HLINKED(FPTR(i))) |
9f2e3c3f | 141 | hlink_list[hlink_count++] = i; |
11dc2740 | 142 | } |
dc5ddbcc | 143 | |
11dc2740 | 144 | qsort(hlink_list, hlink_count, |
0d6e308b | 145 | sizeof hlink_list[0], (int (*)()) hlink_compare); |
dc5ddbcc | 146 | |
6aae748e WD |
147 | if (!hlink_count) { |
148 | free(hlink_list); | |
149 | hlink_list = NULL; | |
1d5cda22 | 150 | } else |
9f2e3c3f | 151 | link_idev_data(); |
dc5ddbcc | 152 | #endif |
dc5ddbcc AT |
153 | } |
154 | ||
3cd5301f WD |
155 | #ifdef SUPPORT_HARD_LINKS |
156 | static int maybe_hard_link(struct file_struct *file, int ndx, | |
157 | char *fname, int statret, STRUCT_STAT *st, | |
158 | char *toname, STRUCT_STAT *to_st, | |
159 | int itemizing, enum logcode code) | |
160 | { | |
161 | if (statret == 0) { | |
162 | if (st->st_dev == to_st->st_dev | |
163 | && st->st_ino == to_st->st_ino) { | |
164 | if (itemizing) { | |
165 | itemize(file, ndx, statret, st, | |
166 | ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS, | |
167 | 0, ""); | |
168 | } | |
169 | return 0; | |
170 | } | |
171 | if (make_backups) { | |
172 | if (!make_backup(fname)) | |
173 | return -1; | |
174 | } else if (robust_unlink(fname)) { | |
175 | rsyserr(FERROR, errno, "unlink %s failed", | |
176 | full_fname(fname)); | |
177 | return -1; | |
178 | } | |
179 | } | |
180 | return hard_link_one(file, ndx, fname, statret, st, toname, | |
181 | 0, itemizing, code); | |
182 | } | |
183 | #endif | |
184 | ||
185 | int hard_link_check(struct file_struct *file, int ndx, char *fname, | |
186 | int statret, STRUCT_STAT *st, int itemizing, | |
187 | enum logcode code, int skip) | |
d38fc305 | 188 | { |
4f5b0756 | 189 | #ifdef SUPPORT_HARD_LINKS |
3cd5301f | 190 | int head; |
82ad07c4 WD |
191 | struct hlist *hl = F_HLIST(file); |
192 | ||
193 | if (skip && !(file->flags & FLAG_HLINK_LAST)) | |
194 | head = hlink_list[hl->hlindex] = hl->next; | |
3cd5301f | 195 | else |
82ad07c4 | 196 | head = hlink_list[hl->hlindex]; |
3cd5301f WD |
197 | if (ndx != head) { |
198 | struct file_struct *head_file = FPTR(head); | |
82ad07c4 | 199 | struct hlist *hf_hl = F_HLIST(head_file); |
20f90d5e | 200 | if (!stdout_format_has_i && verbose > 1) { |
6cbde57d WD |
201 | rprintf(FINFO, "\"%s\" is a hard link\n", |
202 | f_name(file, NULL)); | |
203 | } | |
82ad07c4 | 204 | if (hf_hl->hlindex == FINISHED_LINK) { |
541b23d1 | 205 | STRUCT_STAT st2, st3; |
1a05de2b | 206 | char toname[MAXPATHLEN]; |
82ad07c4 | 207 | int ldu = hf_hl->dest_used; |
1a05de2b WD |
208 | if (ldu) { |
209 | pathjoin(toname, MAXPATHLEN, basis_dir[ldu-1], | |
210 | f_name(head_file, NULL)); | |
211 | } else | |
212 | f_name(head_file, toname); | |
3cd5301f WD |
213 | if (link_stat(toname, &st2, 0) < 0) { |
214 | rsyserr(FERROR, errno, "stat %s failed", | |
215 | full_fname(toname)); | |
216 | return -1; | |
217 | } | |
541b23d1 WD |
218 | if (statret < 0 && basis_dir[0] != NULL) { |
219 | char cmpbuf[MAXPATHLEN]; | |
220 | int j = 0; | |
221 | do { | |
222 | pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname); | |
223 | if (link_stat(cmpbuf, &st3, 0) < 0) | |
224 | continue; | |
225 | if (link_dest) { | |
226 | if (st2.st_dev != st3.st_dev | |
227 | || st2.st_ino != st3.st_ino) | |
228 | continue; | |
229 | statret = 1; | |
230 | st = &st3; | |
36e2ea60 WD |
231 | if (verbose < 2 || !stdout_format_has_i) { |
232 | itemizing = 0; | |
233 | code = FNONE; | |
234 | } | |
541b23d1 WD |
235 | break; |
236 | } | |
237 | if (!unchanged_file(cmpbuf, file, &st3)) | |
238 | continue; | |
239 | statret = 1; | |
240 | st = &st3; | |
241 | if (unchanged_attrs(file, &st3)) | |
242 | break; | |
243 | } while (basis_dir[++j] != NULL); | |
244 | } | |
3cd5301f WD |
245 | maybe_hard_link(file, ndx, fname, statret, st, |
246 | toname, &st2, itemizing, code); | |
663b2857 WD |
247 | if (remove_source_files == 1 && do_xfers) |
248 | send_msg_int(MSG_SUCCESS, ndx); | |
82ad07c4 | 249 | hl->hlindex = FINISHED_LINK; |
3cd5301f | 250 | } else |
82ad07c4 | 251 | hl->hlindex = SKIPPED_LINK; |
d38fc305 WD |
252 | return 1; |
253 | } | |
bb91a624 | 254 | #endif |
d38fc305 WD |
255 | return 0; |
256 | } | |
257 | ||
4f5b0756 | 258 | #ifdef SUPPORT_HARD_LINKS |
9f2e3c3f WD |
259 | int hard_link_one(struct file_struct *file, int ndx, char *fname, |
260 | int statret, STRUCT_STAT *st, char *toname, int terse, | |
261 | int itemizing, enum logcode code) | |
a16bbc39 | 262 | { |
9f2e3c3f | 263 | if (do_link(toname, fname)) { |
3cd5301f WD |
264 | if (terse) { |
265 | if (!verbose) | |
266 | return -1; | |
267 | code = FINFO; | |
268 | } else | |
269 | code = FERROR; | |
270 | rsyserr(code, errno, "link %s => %s failed", | |
45c49b52 | 271 | full_fname(fname), toname); |
9f2e3c3f WD |
272 | return -1; |
273 | } | |
274 | ||
275 | if (itemizing) { | |
b7d4d28b WD |
276 | itemize(file, ndx, statret, st, |
277 | ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS, 0, | |
9f2e3c3f WD |
278 | terse ? "" : toname); |
279 | } | |
36e2ea60 | 280 | if (code != FNONE && verbose && !terse) |
45c49b52 | 281 | rprintf(code, "%s => %s\n", fname, toname); |
9f2e3c3f | 282 | return 0; |
a16bbc39 AT |
283 | } |
284 | #endif | |
285 | ||
fae5bb31 | 286 | |
9f2e3c3f | 287 | void hard_link_cluster(struct file_struct *file, int master, int itemizing, |
82ad07c4 | 288 | enum logcode code, int dest_used) |
dc5ddbcc | 289 | { |
4f5b0756 | 290 | #ifdef SUPPORT_HARD_LINKS |
3fef5364 WD |
291 | char hlink1[MAXPATHLEN]; |
292 | char *hlink2; | |
1d5cda22 | 293 | STRUCT_STAT st1, st2; |
9f2e3c3f | 294 | int statret, ndx = master; |
82ad07c4 | 295 | struct hlist *hl = F_HLIST(file); |
a16bbc39 | 296 | |
82ad07c4 WD |
297 | hl->hlindex = FINISHED_LINK; |
298 | if (dry_run) | |
299 | hl->dest_used = dest_used + 1; | |
6cbde57d | 300 | if (link_stat(f_name(file, hlink1), &st1, 0) < 0) |
6e69cff1 | 301 | return; |
82ad07c4 WD |
302 | if (!(file->flags & FLAG_HLINK_FIRST)) { |
303 | while (!(file->flags & FLAG_HLINK_LAST)) { | |
304 | ndx = hl->next; | |
9f2e3c3f | 305 | file = FPTR(ndx); |
82ad07c4 | 306 | hl = F_HLIST(file); |
9f2e3c3f WD |
307 | } |
308 | } | |
309 | do { | |
82ad07c4 | 310 | ndx = hl->next; |
9f2e3c3f | 311 | file = FPTR(ndx); |
82ad07c4 WD |
312 | hl = F_HLIST(file); |
313 | if (hl->hlindex != SKIPPED_LINK) | |
1d5cda22 | 314 | continue; |
6cbde57d | 315 | hlink2 = f_name(file, NULL); |
3cd5301f WD |
316 | statret = link_stat(hlink2, &st2, 0); |
317 | maybe_hard_link(file, ndx, hlink2, statret, &st2, | |
318 | hlink1, &st1, itemizing, code); | |
663b2857 WD |
319 | if (remove_source_files == 1 && do_xfers) |
320 | send_msg_int(MSG_SUCCESS, ndx); | |
82ad07c4 WD |
321 | hl->hlindex = FINISHED_LINK; |
322 | } while (!(file->flags & FLAG_HLINK_LAST)); | |
dc5ddbcc AT |
323 | #endif |
324 | } |