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 | { |
97e786c3 | 55 | int cur, 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; | |
97e786c3 WD |
65 | while (1) { |
66 | cur = hlink_list[from]; | |
67 | if (from == hlink_count-1 | |
68 | || !LINKED(cur, hlink_list[from+1])) | |
69 | break; | |
70 | pool_free(idev_pool, 0, FPTR(cur)->link_u.idev); | |
71 | FPTR(cur)->link_u.links = pool_talloc(hlink_pool, | |
9935066b S |
72 | struct hlink, 1, "hlink_list"); |
73 | ||
97e786c3 WD |
74 | FPTR(cur)->F_HLINDEX = to; |
75 | FPTR(cur)->F_NEXT = hlink_list[++from]; | |
1d5cda22 | 76 | } |
97e786c3 | 77 | pool_free(idev_pool, 0, FPTR(cur)->link_u.idev); |
1d5cda22 | 78 | if (from > start) { |
97e786c3 WD |
79 | int head = hlink_list[start]; |
80 | FPTR(cur)->link_u.links = pool_talloc(hlink_pool, | |
9935066b S |
81 | struct hlink, 1, "hlink_list"); |
82 | ||
9f2e3c3f | 83 | FPTR(head)->flags |= FLAG_HLINK_TOL; |
97e786c3 WD |
84 | FPTR(cur)->F_HLINDEX = to; |
85 | FPTR(cur)->F_NEXT = head; | |
86 | FPTR(cur)->flags |= FLAG_HLINK_EOL; | |
1d5cda22 | 87 | hlink_list[to++] = head; |
97e786c3 WD |
88 | } else |
89 | FPTR(cur)->link_u.links = NULL; | |
1d5cda22 WD |
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 | |
6e69cff1 MP |
113 | if (hlink_list) |
114 | free(hlink_list); | |
115 | ||
9f2e3c3f | 116 | if (!(hlink_list = new_array(int, the_file_list->count))) |
dd04a034 | 117 | out_of_memory("init_hard_links"); |
6aae748e | 118 | |
11dc2740 | 119 | hlink_count = 0; |
9f2e3c3f WD |
120 | for (i = 0; i < the_file_list->count; i++) { |
121 | if (FPTR(i)->link_u.idev) | |
122 | hlink_list[hlink_count++] = i; | |
11dc2740 | 123 | } |
dc5ddbcc | 124 | |
11dc2740 | 125 | qsort(hlink_list, hlink_count, |
0d6e308b | 126 | sizeof hlink_list[0], (int (*)()) hlink_compare); |
dc5ddbcc | 127 | |
6aae748e WD |
128 | if (!hlink_count) { |
129 | free(hlink_list); | |
130 | hlink_list = NULL; | |
1d5cda22 | 131 | } else |
9f2e3c3f | 132 | link_idev_data(); |
dc5ddbcc | 133 | #endif |
dc5ddbcc AT |
134 | } |
135 | ||
9f2e3c3f | 136 | int hard_link_check(struct file_struct *file, int ndx, int skip) |
d38fc305 | 137 | { |
4f5b0756 | 138 | #ifdef SUPPORT_HARD_LINKS |
97e786c3 | 139 | if (!file->link_u.links) |
d38fc305 WD |
140 | return 0; |
141 | if (skip && !(file->flags & FLAG_HLINK_EOL)) | |
142 | hlink_list[file->F_HLINDEX] = file->F_NEXT; | |
9f2e3c3f WD |
143 | if (hlink_list[file->F_HLINDEX] != ndx) { |
144 | if (verbose > 2) { | |
d38fc305 | 145 | rprintf(FINFO, "\"%s\" is a hard link\n", |
71903f60 | 146 | safe_fname(f_name(file))); |
d38fc305 WD |
147 | } |
148 | return 1; | |
149 | } | |
bb91a624 | 150 | #endif |
d38fc305 WD |
151 | return 0; |
152 | } | |
153 | ||
4f5b0756 | 154 | #ifdef SUPPORT_HARD_LINKS |
9f2e3c3f WD |
155 | int hard_link_one(struct file_struct *file, int ndx, char *fname, |
156 | int statret, STRUCT_STAT *st, char *toname, int terse, | |
157 | int itemizing, enum logcode code) | |
a16bbc39 | 158 | { |
9f2e3c3f | 159 | if (do_link(toname, fname)) { |
0d6e308b | 160 | if (verbose) { |
9f2e3c3f WD |
161 | rsyserr(FERROR, errno, "link %s => %s failed", |
162 | full_fname(fname), safe_fname(toname)); | |
a16bbc39 | 163 | } |
9f2e3c3f WD |
164 | return -1; |
165 | } | |
166 | ||
167 | if (itemizing) { | |
b7d4d28b WD |
168 | itemize(file, ndx, statret, st, |
169 | ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS, 0, | |
9f2e3c3f WD |
170 | terse ? "" : toname); |
171 | } | |
172 | if (code && verbose && !terse) { | |
173 | rprintf(code, "%s => %s\n", | |
174 | safe_fname(fname), safe_fname(toname)); | |
a16bbc39 | 175 | } |
9f2e3c3f | 176 | return 0; |
a16bbc39 AT |
177 | } |
178 | #endif | |
179 | ||
fae5bb31 | 180 | |
9f2e3c3f WD |
181 | void hard_link_cluster(struct file_struct *file, int master, int itemizing, |
182 | enum logcode code) | |
dc5ddbcc | 183 | { |
4f5b0756 | 184 | #ifdef SUPPORT_HARD_LINKS |
3fef5364 WD |
185 | char hlink1[MAXPATHLEN]; |
186 | char *hlink2; | |
1d5cda22 | 187 | STRUCT_STAT st1, st2; |
9f2e3c3f | 188 | int statret, ndx = master; |
a16bbc39 | 189 | |
9f2e3c3f | 190 | if (link_stat(f_name_to(file, hlink1), &st1, 0) < 0) |
6e69cff1 | 191 | return; |
9f2e3c3f WD |
192 | if (!(file->flags & FLAG_HLINK_TOL)) { |
193 | while (!(file->flags & FLAG_HLINK_EOL)) { | |
194 | ndx = file->F_NEXT; | |
195 | file = FPTR(ndx); | |
196 | } | |
197 | } | |
198 | do { | |
199 | ndx = file->F_NEXT; | |
200 | file = FPTR(ndx); | |
201 | if (ndx == master) | |
1d5cda22 | 202 | continue; |
9f2e3c3f WD |
203 | hlink2 = f_name(file); |
204 | if ((statret = link_stat(hlink2, &st2, 0)) == 0) { | |
205 | if (st2.st_dev == st1.st_dev | |
206 | && st2.st_ino == st1.st_ino) { | |
207 | if (itemizing) { | |
b7d4d28b WD |
208 | itemize(file, ndx, statret, &st2, |
209 | ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS, | |
210 | 0, ""); | |
9f2e3c3f WD |
211 | } |
212 | continue; | |
213 | } | |
214 | if (make_backups) { | |
215 | if (!make_backup(hlink2)) | |
1d5cda22 | 216 | continue; |
9f2e3c3f WD |
217 | } else if (robust_unlink(hlink2)) { |
218 | if (verbose > 0) { | |
219 | rsyserr(FINFO, errno, | |
220 | "unlink %s failed", | |
221 | full_fname(hlink2)); | |
1d5cda22 | 222 | } |
9f2e3c3f | 223 | continue; |
1d5cda22 | 224 | } |
6e69cff1 | 225 | } |
9f2e3c3f WD |
226 | hard_link_one(file, ndx, hlink2, statret, |
227 | &st2, hlink1, 0, itemizing, code); | |
228 | } while (!(file->flags & FLAG_HLINK_EOL)); | |
dc5ddbcc AT |
229 | #endif |
230 | } |