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; |
82ad07c4 | 31 | extern int flist_extra_ndx; |
47c11975 | 32 | extern int remove_source_files; |
20f90d5e | 33 | extern int stdout_format_has_i; |
541b23d1 | 34 | extern char *basis_dir[]; |
9f2e3c3f | 35 | extern struct file_list *the_file_list; |
dc5ddbcc | 36 | |
4f5b0756 | 37 | #ifdef SUPPORT_HARD_LINKS |
9f2e3c3f | 38 | |
3cd5301f WD |
39 | #define SKIPPED_LINK (-1) |
40 | #define FINISHED_LINK (-2) | |
41 | ||
9f2e3c3f | 42 | #define FPTR(i) (the_file_list->files[i]) |
82ad07c4 | 43 | #define LINKED(i1,i2) ((i1)->dev == (i2)->dev && (i1)->ino == (i2)->ino) |
9f2e3c3f WD |
44 | |
45 | static int hlink_compare(int *int1, int *int2) | |
dc5ddbcc | 46 | { |
9f2e3c3f WD |
47 | struct file_struct *f1 = FPTR(*int1); |
48 | struct file_struct *f2 = FPTR(*int2); | |
82ad07c4 WD |
49 | struct idev *i1 = F_IDEV(f1); |
50 | struct idev *i2 = F_IDEV(f2); | |
11dc2740 | 51 | |
82ad07c4 WD |
52 | if (i1->dev != i2->dev) |
53 | return (int)(i1->dev > i2->dev ? 1 : -1); | |
dc5ddbcc | 54 | |
82ad07c4 WD |
55 | if (i1->ino != i2->ino) |
56 | return (int)(i1->ino > i2->ino ? 1 : -1); | |
dc5ddbcc | 57 | |
122d1771 | 58 | return f_name_cmp(f1, f2); |
11dc2740 | 59 | } |
dc5ddbcc | 60 | |
1a05de2b WD |
61 | static int32 *hlink_list; |
62 | static int32 hlink_count; | |
1d5cda22 | 63 | |
1d5cda22 | 64 | /* Analyze the data in the hlink_list[], remove items that aren't multiply |
90481755 | 65 | * linked, and replace the dev+inode data with the hlindex+next linked list. */ |
9f2e3c3f | 66 | static void link_idev_data(void) |
1d5cda22 | 67 | { |
82ad07c4 WD |
68 | int32 from, to, start; |
69 | struct file_struct *file, *file_next; | |
70 | struct idev *idev, *idev_next; | |
71 | struct hlist *hl; | |
1d5cda22 | 72 | |
9935066b | 73 | alloc_pool_t hlink_pool; |
9f2e3c3f | 74 | alloc_pool_t idev_pool = the_file_list->hlink_pool; |
9935066b | 75 | |
82ad07c4 | 76 | hlink_pool = pool_create(128 * 1024, sizeof (struct hlist), out_of_memory, POOL_INTERN); |
9935066b | 77 | |
1d5cda22 WD |
78 | for (from = to = 0; from < hlink_count; from++) { |
79 | start = from; | |
82ad07c4 WD |
80 | for (file = FPTR(hlink_list[from]), idev = F_IDEV(file); |
81 | from < hlink_count-1; | |
82 | file = file_next, idev = idev_next) | |
83 | { | |
84 | file_next = FPTR(hlink_list[from+1]); | |
85 | idev_next = F_IDEV(file_next); | |
86 | if (!LINKED(idev, idev_next)) | |
97e786c3 | 87 | break; |
82ad07c4 WD |
88 | pool_free(idev_pool, 0, idev); |
89 | hl = pool_talloc(hlink_pool, struct hlist, 1, | |
90 | "hlink_list"); | |
91 | hl->hlindex = to; | |
92 | hl->next = hlink_list[++from]; | |
93 | hl->dest_used = 0; | |
94 | F_HLIST(file) = hl; | |
1d5cda22 | 95 | } |
82ad07c4 | 96 | pool_free(idev_pool, 0, idev); |
1d5cda22 | 97 | if (from > start) { |
97e786c3 | 98 | int head = hlink_list[start]; |
82ad07c4 WD |
99 | hl = pool_talloc(hlink_pool, struct hlist, 1, |
100 | "hlink_list"); | |
101 | FPTR(head)->flags |= FLAG_HLINK_FIRST; | |
102 | hl->hlindex = to; | |
103 | hl->next = head; | |
104 | hl->dest_used = 0; | |
1d5cda22 | 105 | hlink_list[to++] = head; |
82ad07c4 WD |
106 | file->flags |= FLAG_HLINK_LAST; |
107 | F_HLIST(file) = hl; | |
97e786c3 | 108 | } else |
82ad07c4 | 109 | file->flags &= ~FLAG_HLINK_INFO; |
1d5cda22 WD |
110 | } |
111 | ||
112 | if (!to) { | |
113 | free(hlink_list); | |
114 | hlink_list = NULL; | |
9935066b S |
115 | pool_destroy(hlink_pool); |
116 | hlink_pool = NULL; | |
1d5cda22 WD |
117 | } else { |
118 | hlink_count = to; | |
1a05de2b | 119 | hlink_list = realloc_array(hlink_list, int32, hlink_count); |
9f2e3c3f | 120 | if (!hlink_list) |
1d5cda22 WD |
121 | out_of_memory("init_hard_links"); |
122 | } | |
9f2e3c3f | 123 | the_file_list->hlink_pool = hlink_pool; |
9935066b | 124 | pool_destroy(idev_pool); |
1d5cda22 | 125 | } |
dc5ddbcc AT |
126 | #endif |
127 | ||
9f2e3c3f | 128 | void init_hard_links(void) |
dc5ddbcc | 129 | { |
4f5b0756 | 130 | #ifdef SUPPORT_HARD_LINKS |
dd04a034 | 131 | int i; |
11dc2740 | 132 | |
6e69cff1 MP |
133 | if (hlink_list) |
134 | free(hlink_list); | |
135 | ||
1a05de2b | 136 | if (!(hlink_list = new_array(int32, the_file_list->count))) |
dd04a034 | 137 | out_of_memory("init_hard_links"); |
6aae748e | 138 | |
11dc2740 | 139 | hlink_count = 0; |
9f2e3c3f | 140 | for (i = 0; i < the_file_list->count; i++) { |
82ad07c4 | 141 | if (IS_HLINKED(FPTR(i))) |
9f2e3c3f | 142 | hlink_list[hlink_count++] = i; |
11dc2740 | 143 | } |
dc5ddbcc | 144 | |
11dc2740 | 145 | qsort(hlink_list, hlink_count, |
0d6e308b | 146 | sizeof hlink_list[0], (int (*)()) hlink_compare); |
dc5ddbcc | 147 | |
6aae748e WD |
148 | if (!hlink_count) { |
149 | free(hlink_list); | |
150 | hlink_list = NULL; | |
1d5cda22 | 151 | } else |
9f2e3c3f | 152 | link_idev_data(); |
dc5ddbcc | 153 | #endif |
dc5ddbcc AT |
154 | } |
155 | ||
3cd5301f WD |
156 | #ifdef SUPPORT_HARD_LINKS |
157 | static int maybe_hard_link(struct file_struct *file, int ndx, | |
158 | char *fname, int statret, STRUCT_STAT *st, | |
159 | char *toname, STRUCT_STAT *to_st, | |
160 | int itemizing, enum logcode code) | |
161 | { | |
162 | if (statret == 0) { | |
163 | if (st->st_dev == to_st->st_dev | |
164 | && st->st_ino == to_st->st_ino) { | |
165 | if (itemizing) { | |
166 | itemize(file, ndx, statret, st, | |
167 | ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS, | |
168 | 0, ""); | |
169 | } | |
170 | return 0; | |
171 | } | |
172 | if (make_backups) { | |
173 | if (!make_backup(fname)) | |
174 | return -1; | |
175 | } else if (robust_unlink(fname)) { | |
176 | rsyserr(FERROR, errno, "unlink %s failed", | |
177 | full_fname(fname)); | |
178 | return -1; | |
179 | } | |
180 | } | |
181 | return hard_link_one(file, ndx, fname, statret, st, toname, | |
182 | 0, itemizing, code); | |
183 | } | |
184 | #endif | |
185 | ||
186 | int hard_link_check(struct file_struct *file, int ndx, char *fname, | |
187 | int statret, STRUCT_STAT *st, int itemizing, | |
188 | enum logcode code, int skip) | |
d38fc305 | 189 | { |
4f5b0756 | 190 | #ifdef SUPPORT_HARD_LINKS |
3cd5301f | 191 | int head; |
82ad07c4 WD |
192 | struct hlist *hl = F_HLIST(file); |
193 | ||
194 | if (skip && !(file->flags & FLAG_HLINK_LAST)) | |
195 | head = hlink_list[hl->hlindex] = hl->next; | |
3cd5301f | 196 | else |
82ad07c4 | 197 | head = hlink_list[hl->hlindex]; |
3cd5301f WD |
198 | if (ndx != head) { |
199 | struct file_struct *head_file = FPTR(head); | |
82ad07c4 | 200 | struct hlist *hf_hl = F_HLIST(head_file); |
20f90d5e | 201 | if (!stdout_format_has_i && verbose > 1) { |
6cbde57d WD |
202 | rprintf(FINFO, "\"%s\" is a hard link\n", |
203 | f_name(file, NULL)); | |
204 | } | |
82ad07c4 | 205 | if (hf_hl->hlindex == FINISHED_LINK) { |
541b23d1 | 206 | STRUCT_STAT st2, st3; |
1a05de2b | 207 | char toname[MAXPATHLEN]; |
82ad07c4 | 208 | int ldu = hf_hl->dest_used; |
1a05de2b WD |
209 | if (ldu) { |
210 | pathjoin(toname, MAXPATHLEN, basis_dir[ldu-1], | |
211 | f_name(head_file, NULL)); | |
212 | } else | |
213 | f_name(head_file, toname); | |
3cd5301f WD |
214 | if (link_stat(toname, &st2, 0) < 0) { |
215 | rsyserr(FERROR, errno, "stat %s failed", | |
216 | full_fname(toname)); | |
217 | return -1; | |
218 | } | |
541b23d1 WD |
219 | if (statret < 0 && basis_dir[0] != NULL) { |
220 | char cmpbuf[MAXPATHLEN]; | |
221 | int j = 0; | |
222 | do { | |
223 | pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname); | |
224 | if (link_stat(cmpbuf, &st3, 0) < 0) | |
225 | continue; | |
226 | if (link_dest) { | |
227 | if (st2.st_dev != st3.st_dev | |
228 | || st2.st_ino != st3.st_ino) | |
229 | continue; | |
230 | statret = 1; | |
231 | st = &st3; | |
36e2ea60 WD |
232 | if (verbose < 2 || !stdout_format_has_i) { |
233 | itemizing = 0; | |
234 | code = FNONE; | |
235 | } | |
541b23d1 WD |
236 | break; |
237 | } | |
238 | if (!unchanged_file(cmpbuf, file, &st3)) | |
239 | continue; | |
240 | statret = 1; | |
241 | st = &st3; | |
242 | if (unchanged_attrs(file, &st3)) | |
243 | break; | |
244 | } while (basis_dir[++j] != NULL); | |
245 | } | |
3cd5301f WD |
246 | maybe_hard_link(file, ndx, fname, statret, st, |
247 | toname, &st2, itemizing, code); | |
47c11975 | 248 | if (remove_source_files == 1 && do_xfers) { |
841d9436 WD |
249 | char numbuf[4]; |
250 | SIVAL(numbuf, 0, ndx); | |
251 | send_msg(MSG_SUCCESS, numbuf, 4); | |
252 | } | |
82ad07c4 | 253 | hl->hlindex = FINISHED_LINK; |
3cd5301f | 254 | } else |
82ad07c4 | 255 | hl->hlindex = SKIPPED_LINK; |
d38fc305 WD |
256 | return 1; |
257 | } | |
bb91a624 | 258 | #endif |
d38fc305 WD |
259 | return 0; |
260 | } | |
261 | ||
4f5b0756 | 262 | #ifdef SUPPORT_HARD_LINKS |
9f2e3c3f WD |
263 | int hard_link_one(struct file_struct *file, int ndx, char *fname, |
264 | int statret, STRUCT_STAT *st, char *toname, int terse, | |
265 | int itemizing, enum logcode code) | |
a16bbc39 | 266 | { |
9f2e3c3f | 267 | if (do_link(toname, fname)) { |
3cd5301f WD |
268 | if (terse) { |
269 | if (!verbose) | |
270 | return -1; | |
271 | code = FINFO; | |
272 | } else | |
273 | code = FERROR; | |
274 | rsyserr(code, errno, "link %s => %s failed", | |
45c49b52 | 275 | full_fname(fname), toname); |
9f2e3c3f WD |
276 | return -1; |
277 | } | |
278 | ||
279 | if (itemizing) { | |
b7d4d28b WD |
280 | itemize(file, ndx, statret, st, |
281 | ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS, 0, | |
9f2e3c3f WD |
282 | terse ? "" : toname); |
283 | } | |
36e2ea60 | 284 | if (code != FNONE && verbose && !terse) |
45c49b52 | 285 | rprintf(code, "%s => %s\n", fname, toname); |
9f2e3c3f | 286 | return 0; |
a16bbc39 AT |
287 | } |
288 | #endif | |
289 | ||
fae5bb31 | 290 | |
9f2e3c3f | 291 | void hard_link_cluster(struct file_struct *file, int master, int itemizing, |
82ad07c4 | 292 | enum logcode code, int dest_used) |
dc5ddbcc | 293 | { |
4f5b0756 | 294 | #ifdef SUPPORT_HARD_LINKS |
3fef5364 WD |
295 | char hlink1[MAXPATHLEN]; |
296 | char *hlink2; | |
1d5cda22 | 297 | STRUCT_STAT st1, st2; |
9f2e3c3f | 298 | int statret, ndx = master; |
82ad07c4 | 299 | struct hlist *hl = F_HLIST(file); |
a16bbc39 | 300 | |
82ad07c4 WD |
301 | hl->hlindex = FINISHED_LINK; |
302 | if (dry_run) | |
303 | hl->dest_used = dest_used + 1; | |
6cbde57d | 304 | if (link_stat(f_name(file, hlink1), &st1, 0) < 0) |
6e69cff1 | 305 | return; |
82ad07c4 WD |
306 | if (!(file->flags & FLAG_HLINK_FIRST)) { |
307 | while (!(file->flags & FLAG_HLINK_LAST)) { | |
308 | ndx = hl->next; | |
9f2e3c3f | 309 | file = FPTR(ndx); |
82ad07c4 | 310 | hl = F_HLIST(file); |
9f2e3c3f WD |
311 | } |
312 | } | |
313 | do { | |
82ad07c4 | 314 | ndx = hl->next; |
9f2e3c3f | 315 | file = FPTR(ndx); |
82ad07c4 WD |
316 | hl = F_HLIST(file); |
317 | if (hl->hlindex != SKIPPED_LINK) | |
1d5cda22 | 318 | continue; |
6cbde57d | 319 | hlink2 = f_name(file, NULL); |
3cd5301f WD |
320 | statret = link_stat(hlink2, &st2, 0); |
321 | maybe_hard_link(file, ndx, hlink2, statret, &st2, | |
322 | hlink1, &st1, itemizing, code); | |
47c11975 | 323 | if (remove_source_files == 1 && do_xfers) { |
841d9436 WD |
324 | char numbuf[4]; |
325 | SIVAL(numbuf, 0, ndx); | |
326 | send_msg(MSG_SUCCESS, numbuf, 4); | |
327 | } | |
82ad07c4 WD |
328 | hl->hlindex = FINISHED_LINK; |
329 | } while (!(file->flags & FLAG_HLINK_LAST)); | |
dc5ddbcc AT |
330 | #endif |
331 | } |