6 * Copyright (C) 2012 Eric Biggers
8 * This file is part of wimlib, a library for working with WIM files.
10 * wimlib is free software; you can redistribute it and/or modify it under the
11 * terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 3 of the License, or (at your option)
15 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
16 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
17 * A PARTICULAR PURPOSE. See the GNU General Public License for more
20 * You should have received a copy of the GNU General Public License
21 * along with wimlib; if not, see http://www.gnu.org/licenses/.
24 #include "wimlib_internal.h"
26 #include "lookup_table.h"
29 static int inode_allocate_needed_ltes(struct inode *inode,
30 struct lookup_table *src_lookup_table,
31 struct lookup_table *dest_lookup_table,
32 struct list_head *lte_list_head)
34 struct lookup_table_entry *src_lte, *dest_lte;
37 inode_unresolve_ltes(inode);
38 for (i = 0; i <= inode->num_ads; i++) {
39 src_lte = inode_stream_lte_unresolved(inode, i,
41 if (src_lte && src_lte->out_refcnt == 0) {
42 src_lte->out_refcnt = 1;
43 dest_lte = inode_stream_lte_unresolved(inode, i,
46 dest_lte = clone_lookup_table_entry(src_lte);
48 return WIMLIB_ERR_NOMEM;
49 list_add_tail(&dest_lte->staging_list, lte_list_head);
56 static void inode_move_ltes_to_table(struct inode *inode,
57 struct lookup_table *src_lookup_table,
58 struct lookup_table *dest_lookup_table,
59 struct list_head *lte_list_head)
61 struct lookup_table_entry *src_lte, *dest_lte;
63 struct dentry *dentry;
65 inode_for_each_dentry(dentry, inode)
68 for (i = 0; i <= inode->num_ads; i++) {
69 src_lte = inode_stream_lte_unresolved(inode, i, src_lookup_table);
71 dest_lte = inode_stream_lte_unresolved(inode, i,
74 struct list_head *next;
76 wimlib_assert(!list_empty(lte_list_head));
77 next = lte_list_head->next;
79 dest_lte = container_of(next,
80 struct lookup_table_entry,
82 dest_lte->part_number = 1;
84 wimlib_assert(hashes_equal(dest_lte->hash, src_lte->hash));
85 lookup_table_insert(dest_lookup_table, dest_lte);
87 dest_lte->refcnt += inode->link_count;
93 * Copies an image, or all the images, from a WIM file, into another WIM file.
95 WIMLIBAPI int wimlib_export_image(WIMStruct *src_wim,
98 const char *dest_name,
99 const char *dest_description,
101 WIMStruct **additional_swms,
102 unsigned num_additional_swms,
103 wimlib_progress_func_t progress_func)
106 struct wim_security_data *sd;
107 struct lookup_table *joined_tab, *src_wim_tab_save;
108 struct image_metadata *src_imd;
109 struct hlist_node *cur_node;
110 struct list_head lte_list_head;
113 if (dest_wim->hdr.total_parts != 1) {
114 ERROR("Exporting an image to a split WIM is "
116 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
119 if (src_image == WIMLIB_ALL_IMAGES) {
120 if (src_wim->hdr.image_count > 1) {
122 /* multi-image export. */
124 if ((export_flags & WIMLIB_EXPORT_FLAG_BOOT) &&
125 (src_wim->hdr.boot_idx == 0))
127 /* Specifying the boot flag on a multi-image
128 * source WIM makes the boot index default to
129 * the bootable image in the source WIM. It is
130 * an error if there is no such bootable image.
132 ERROR("Cannot specify `boot' flag when "
133 "exporting multiple images from a WIM "
134 "with no bootable images");
135 return WIMLIB_ERR_INVALID_PARAM;
137 if (dest_name || dest_description) {
138 ERROR("Image name or image description was "
139 "specified, but we are exporting "
141 return WIMLIB_ERR_INVALID_PARAM;
143 for (int i = 1; i <= src_wim->hdr.image_count; i++) {
144 int new_flags = export_flags;
146 if (i != src_wim->hdr.boot_idx)
147 new_flags &= ~WIMLIB_EXPORT_FLAG_BOOT;
149 ret = wimlib_export_image(src_wim, i, dest_wim,
159 } else if (src_wim->hdr.image_count == 1) {
167 dest_name = wimlib_get_image_name(src_wim, src_image);
168 DEBUG("Using name `%s' for source image %d",
169 dest_name, src_image);
172 if (!dest_description) {
173 dest_description = wimlib_get_image_description(src_wim,
175 DEBUG("Using description `%s' for source image %d",
176 dest_description, src_image);
179 DEBUG("Exporting image %d from `%s'", src_image, src_wim->filename);
181 if (wimlib_image_name_in_use(dest_wim, dest_name)) {
182 ERROR("There is already an image named `%s' in the "
183 "destination WIM", dest_name);
184 return WIMLIB_ERR_IMAGE_NAME_COLLISION;
187 ret = verify_swm_set(src_wim, additional_swms, num_additional_swms);
191 if (num_additional_swms) {
192 ret = new_joined_lookup_table(src_wim, additional_swms,
197 src_wim_tab_save = src_wim->lookup_table;
198 src_wim->lookup_table = joined_tab;
201 ret = select_wim_image(src_wim, src_image);
203 ERROR("Could not select image %d from the WIM `%s' "
204 "to export it", src_image, src_wim->filename);
208 /* Pre-allocate the new lookup table entries that will be needed. This
209 * way, it's not possible to run out of memory part-way through
210 * modifying the lookup table of the destination WIM. */
211 INIT_LIST_HEAD(<e_list_head);
212 for_lookup_table_entry(src_wim->lookup_table, lte_zero_out_refcnt, NULL);
213 src_imd = wim_get_current_image_metadata(src_wim);
215 hlist_for_each_entry(inode, cur_node, &src_imd->inode_list, hlist) {
216 ret = inode_allocate_needed_ltes(inode,
217 src_wim->lookup_table,
218 dest_wim->lookup_table,
224 ret = xml_export_image(src_wim->wim_info, src_image,
225 &dest_wim->wim_info, dest_name,
230 sd = src_imd->security_data;
231 ret = add_new_dentry_tree(dest_wim, src_imd->root_dentry, sd);
233 goto out_xml_delete_image;
235 dest_wim->image_metadata[
236 dest_wim->hdr.image_count - 1].inode_list = src_imd->inode_list;
238 /* All memory allocations have been taken care of, so it's no longer
239 * possible for this function to fail. Go ahead and increment the
240 * reference counts of the dentry tree and security data, then update
241 * the lookup table of the destination WIM and the boot index, if
244 hlist_for_each_entry(inode, cur_node, &src_imd->inode_list, hlist) {
245 inode_move_ltes_to_table(inode,
246 src_wim->lookup_table,
247 dest_wim->lookup_table,
251 if (export_flags & WIMLIB_EXPORT_FLAG_BOOT)
252 wimlib_set_boot_idx(dest_wim, dest_wim->hdr.image_count);
256 out_xml_delete_image:
257 xml_delete_image(&dest_wim->wim_info, dest_wim->hdr.image_count);
260 struct lookup_table_entry *lte, *tmp;
261 list_for_each_entry_safe(lte, tmp, <e_list_head, staging_list)
262 free_lookup_table_entry(lte);
266 if (num_additional_swms) {
267 free_lookup_table(src_wim->lookup_table);
268 src_wim->lookup_table = src_wim_tab_save;