Commit | Line | Data |
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6aae748e | 1 | /* |
dc5ddbcc AT |
2 | Copyright (C) Andrew Tridgell 1996 |
3 | Copyright (C) Paul Mackerras 1996 | |
6e69cff1 | 4 | Copyright (C) 2002 by Martin Pool <mbp@samba.org> |
6aae748e | 5 | |
dc5ddbcc AT |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
6aae748e | 10 | |
dc5ddbcc AT |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
6aae748e | 15 | |
dc5ddbcc AT |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #include "rsync.h" | |
22 | ||
dc5ddbcc | 23 | extern int dry_run; |
9a52223b | 24 | extern int verbose; |
417c99f6 | 25 | extern int make_backups; |
9f2e3c3f | 26 | extern struct file_list *the_file_list; |
dc5ddbcc | 27 | |
4f5b0756 | 28 | #ifdef SUPPORT_HARD_LINKS |
9f2e3c3f WD |
29 | |
30 | #define FPTR(i) (the_file_list->files[i]) | |
31 | #define LINKED(p1,p2) (FPTR(p1)->F_DEV == FPTR(p2)->F_DEV \ | |
32 | && FPTR(p1)->F_INODE == FPTR(p2)->F_INODE) | |
33 | ||
34 | static int hlink_compare(int *int1, int *int2) | |
dc5ddbcc | 35 | { |
9f2e3c3f WD |
36 | struct file_struct *f1 = FPTR(*int1); |
37 | struct file_struct *f2 = FPTR(*int2); | |
11dc2740 | 38 | |
92cc9dd7 WD |
39 | if (f1->F_DEV != f2->F_DEV) |
40 | return (int) (f1->F_DEV > f2->F_DEV ? 1 : -1); | |
dc5ddbcc | 41 | |
92cc9dd7 WD |
42 | if (f1->F_INODE != f2->F_INODE) |
43 | return (int) (f1->F_INODE > f2->F_INODE ? 1 : -1); | |
dc5ddbcc | 44 | |
122d1771 | 45 | return f_name_cmp(f1, f2); |
11dc2740 | 46 | } |
dc5ddbcc | 47 | |
9f2e3c3f | 48 | static int *hlink_list; |
417c99f6 | 49 | static int hlink_count; |
1d5cda22 | 50 | |
1d5cda22 | 51 | /* Analyze the data in the hlink_list[], remove items that aren't multiply |
90481755 | 52 | * linked, and replace the dev+inode data with the hlindex+next linked list. */ |
9f2e3c3f | 53 | static void link_idev_data(void) |
1d5cda22 | 54 | { |
9f2e3c3f | 55 | int head, from, to, start; |
1d5cda22 | 56 | |
9935066b | 57 | alloc_pool_t hlink_pool; |
9f2e3c3f | 58 | alloc_pool_t idev_pool = the_file_list->hlink_pool; |
9935066b S |
59 | |
60 | hlink_pool = pool_create(128 * 1024, sizeof (struct hlink), | |
61 | out_of_memory, POOL_INTERN); | |
62 | ||
1d5cda22 WD |
63 | for (from = to = 0; from < hlink_count; from++) { |
64 | start = from; | |
65 | head = hlink_list[start]; | |
66 | while (from < hlink_count-1 | |
67 | && LINKED(hlink_list[from], hlink_list[from+1])) { | |
9f2e3c3f WD |
68 | pool_free(idev_pool, 0, FPTR(hlink_list[from])->link_u.idev); |
69 | FPTR(hlink_list[from])->link_u.links = pool_talloc(hlink_pool, | |
9935066b S |
70 | struct hlink, 1, "hlink_list"); |
71 | ||
9f2e3c3f WD |
72 | FPTR(hlink_list[from])->F_HLINDEX = to; |
73 | FPTR(hlink_list[from])->F_NEXT = hlink_list[from+1]; | |
1d5cda22 WD |
74 | from++; |
75 | } | |
76 | if (from > start) { | |
9f2e3c3f WD |
77 | pool_free(idev_pool, 0, FPTR(hlink_list[from])->link_u.idev); |
78 | FPTR(hlink_list[from])->link_u.links = pool_talloc(hlink_pool, | |
9935066b S |
79 | struct hlink, 1, "hlink_list"); |
80 | ||
9f2e3c3f WD |
81 | FPTR(head)->flags |= FLAG_HLINK_TOL; |
82 | FPTR(hlink_list[from])->F_HLINDEX = to; | |
83 | FPTR(hlink_list[from])->F_NEXT = head; | |
84 | FPTR(hlink_list[from])->flags |= FLAG_HLINK_EOL; | |
1d5cda22 WD |
85 | hlink_list[to++] = head; |
86 | } else { | |
9f2e3c3f WD |
87 | pool_free(idev_pool, 0, FPTR(head)->link_u.idev); |
88 | FPTR(head)->link_u.idev = NULL; | |
1d5cda22 WD |
89 | } |
90 | } | |
91 | ||
92 | if (!to) { | |
93 | free(hlink_list); | |
94 | hlink_list = NULL; | |
9935066b S |
95 | pool_destroy(hlink_pool); |
96 | hlink_pool = NULL; | |
1d5cda22 WD |
97 | } else { |
98 | hlink_count = to; | |
9f2e3c3f WD |
99 | hlink_list = realloc_array(hlink_list, int, hlink_count); |
100 | if (!hlink_list) | |
1d5cda22 WD |
101 | out_of_memory("init_hard_links"); |
102 | } | |
9f2e3c3f | 103 | the_file_list->hlink_pool = hlink_pool; |
9935066b | 104 | pool_destroy(idev_pool); |
1d5cda22 | 105 | } |
dc5ddbcc AT |
106 | #endif |
107 | ||
9f2e3c3f | 108 | void init_hard_links(void) |
dc5ddbcc | 109 | { |
4f5b0756 | 110 | #ifdef SUPPORT_HARD_LINKS |
dd04a034 | 111 | int i; |
11dc2740 | 112 | |
9f2e3c3f | 113 | if (the_file_list->count < 2) |
6e69cff1 | 114 | return; |
dc5ddbcc | 115 | |
6e69cff1 MP |
116 | if (hlink_list) |
117 | free(hlink_list); | |
118 | ||
9f2e3c3f | 119 | if (!(hlink_list = new_array(int, the_file_list->count))) |
dd04a034 | 120 | out_of_memory("init_hard_links"); |
6aae748e | 121 | |
11dc2740 | 122 | hlink_count = 0; |
9f2e3c3f WD |
123 | for (i = 0; i < the_file_list->count; i++) { |
124 | if (FPTR(i)->link_u.idev) | |
125 | hlink_list[hlink_count++] = i; | |
11dc2740 | 126 | } |
dc5ddbcc | 127 | |
11dc2740 | 128 | qsort(hlink_list, hlink_count, |
0d6e308b | 129 | sizeof hlink_list[0], (int (*)()) hlink_compare); |
dc5ddbcc | 130 | |
6aae748e WD |
131 | if (!hlink_count) { |
132 | free(hlink_list); | |
133 | hlink_list = NULL; | |
1d5cda22 | 134 | } else |
9f2e3c3f | 135 | link_idev_data(); |
dc5ddbcc | 136 | #endif |
dc5ddbcc AT |
137 | } |
138 | ||
9f2e3c3f | 139 | int hard_link_check(struct file_struct *file, int ndx, int skip) |
d38fc305 | 140 | { |
4f5b0756 | 141 | #ifdef SUPPORT_HARD_LINKS |
028fdddb | 142 | if (!hlink_list || !file->link_u.links) |
d38fc305 WD |
143 | return 0; |
144 | if (skip && !(file->flags & FLAG_HLINK_EOL)) | |
145 | hlink_list[file->F_HLINDEX] = file->F_NEXT; | |
9f2e3c3f WD |
146 | if (hlink_list[file->F_HLINDEX] != ndx) { |
147 | if (verbose > 2) { | |
d38fc305 | 148 | rprintf(FINFO, "\"%s\" is a hard link\n", |
71903f60 | 149 | safe_fname(f_name(file))); |
d38fc305 WD |
150 | } |
151 | return 1; | |
152 | } | |
bb91a624 | 153 | #endif |
d38fc305 WD |
154 | return 0; |
155 | } | |
156 | ||
4f5b0756 | 157 | #ifdef SUPPORT_HARD_LINKS |
9f2e3c3f WD |
158 | int hard_link_one(struct file_struct *file, int ndx, char *fname, |
159 | int statret, STRUCT_STAT *st, char *toname, int terse, | |
160 | int itemizing, enum logcode code) | |
a16bbc39 | 161 | { |
9f2e3c3f | 162 | if (do_link(toname, fname)) { |
0d6e308b | 163 | if (verbose) { |
9f2e3c3f WD |
164 | rsyserr(FERROR, errno, "link %s => %s failed", |
165 | full_fname(fname), safe_fname(toname)); | |
a16bbc39 | 166 | } |
9f2e3c3f WD |
167 | return -1; |
168 | } | |
169 | ||
170 | if (itemizing) { | |
b7d4d28b WD |
171 | itemize(file, ndx, statret, st, |
172 | ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS, 0, | |
9f2e3c3f WD |
173 | terse ? "" : toname); |
174 | } | |
175 | if (code && verbose && !terse) { | |
176 | rprintf(code, "%s => %s\n", | |
177 | safe_fname(fname), safe_fname(toname)); | |
a16bbc39 | 178 | } |
9f2e3c3f | 179 | return 0; |
a16bbc39 AT |
180 | } |
181 | #endif | |
182 | ||
fae5bb31 | 183 | |
9f2e3c3f WD |
184 | void hard_link_cluster(struct file_struct *file, int master, int itemizing, |
185 | enum logcode code) | |
dc5ddbcc | 186 | { |
4f5b0756 | 187 | #ifdef SUPPORT_HARD_LINKS |
3fef5364 WD |
188 | char hlink1[MAXPATHLEN]; |
189 | char *hlink2; | |
1d5cda22 | 190 | STRUCT_STAT st1, st2; |
9f2e3c3f | 191 | int statret, ndx = master; |
a16bbc39 | 192 | |
9f2e3c3f | 193 | if (link_stat(f_name_to(file, hlink1), &st1, 0) < 0) |
6e69cff1 | 194 | return; |
9f2e3c3f WD |
195 | if (!(file->flags & FLAG_HLINK_TOL)) { |
196 | while (!(file->flags & FLAG_HLINK_EOL)) { | |
197 | ndx = file->F_NEXT; | |
198 | file = FPTR(ndx); | |
199 | } | |
200 | } | |
201 | do { | |
202 | ndx = file->F_NEXT; | |
203 | file = FPTR(ndx); | |
204 | if (ndx == master) | |
1d5cda22 | 205 | continue; |
9f2e3c3f WD |
206 | hlink2 = f_name(file); |
207 | if ((statret = link_stat(hlink2, &st2, 0)) == 0) { | |
208 | if (st2.st_dev == st1.st_dev | |
209 | && st2.st_ino == st1.st_ino) { | |
210 | if (itemizing) { | |
b7d4d28b WD |
211 | itemize(file, ndx, statret, &st2, |
212 | ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS, | |
213 | 0, ""); | |
9f2e3c3f WD |
214 | } |
215 | continue; | |
216 | } | |
217 | if (make_backups) { | |
218 | if (!make_backup(hlink2)) | |
1d5cda22 | 219 | continue; |
9f2e3c3f WD |
220 | } else if (robust_unlink(hlink2)) { |
221 | if (verbose > 0) { | |
222 | rsyserr(FINFO, errno, | |
223 | "unlink %s failed", | |
224 | full_fname(hlink2)); | |
1d5cda22 | 225 | } |
9f2e3c3f | 226 | continue; |
1d5cda22 | 227 | } |
6e69cff1 | 228 | } |
9f2e3c3f WD |
229 | hard_link_one(file, ndx, hlink2, statret, |
230 | &st2, hlink1, 0, itemizing, code); | |
231 | } while (!(file->flags & FLAG_HLINK_EOL)); | |
dc5ddbcc AT |
232 | #endif |
233 | } |