4 * This file implements mounting of WIM files using FUSE, which stands for
5 * Filesystem in Userspace. FUSE allows a filesystem to be implemented in a
6 * userspace process by implementing the filesystem primitives--- read(),
7 * write(), readdir(), etc.
11 * Copyright (C) 2012, 2013 Eric Biggers
13 * This file is part of wimlib, a library for working with WIM files.
15 * wimlib is free software; you can redistribute it and/or modify it under the
16 * terms of the GNU General Public License as published by the Free
17 * Software Foundation; either version 3 of the License, or (at your option)
20 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
21 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
22 * A PARTICULAR PURPOSE. See the GNU General Public License for more
25 * You should have received a copy of the GNU General Public License
26 * along with wimlib; if not, see http://www.gnu.org/licenses/.
29 #include "wimlib_internal.h"
34 # error "FUSE mount not supported on Win32! Please configure --without-fuse"
37 #include "buffer_io.h"
38 #include "lookup_table.h"
40 #include "timestamp.h"
52 #include <sys/types.h>
57 #define FUSE_USE_VERSION 26
61 #include <attr/xattr.h>
64 #define MSG_VERSION_TOO_HIGH -1
65 #define MSG_BREAK_LOOP -2
67 /* File descriptor to a file open on the WIM filesystem. */
69 struct wim_inode *f_inode;
70 struct wim_lookup_table_entry *f_lte;
76 struct wimfs_context {
77 /* The WIMStruct for the mounted WIM. */
80 /* Name of the staging directory for a read-write mount. Whenever a new file is
81 * created, it is done so in the staging directory. Furthermore, whenever a
82 * file in the WIM is modified, it is extracted to the staging directory. If
83 * changes are commited when the WIM is unmounted, the file resources are merged
84 * in from the staging directory when writing the new WIM. */
85 char *staging_dir_name;
86 size_t staging_dir_name_len;
88 /* Flags passed to wimlib_mount(). */
91 /* Default flags to use when looking up a WIM dentry (depends on whether
92 * the Windows interface to alternate data streams is being used or
94 int default_lookup_flags;
96 /* Next inode number to be assigned. Note: I didn't bother with a
97 * bitmap of free inode numbers since this isn't even a "real"
98 * filesystem anyway. */
101 /* List of lookup table entries for files in the staging directory */
102 struct list_head staging_list;
104 /* List of inodes in the mounted image */
105 struct hlist_head *image_inode_list;
107 /* Name and message queue descriptors for message queues between the
108 * filesystem daemon process and the unmount process. These are used
109 * when the filesystem is unmounted and the process running
110 * wimlib_unmount_image() (i.e. the `imagex unmount' command) needs to
111 * communicate with the filesystem daemon running fuse_main() (i.e. the
112 * daemon created by the `imagex mount' or `imagex mountrw' commands */
113 char *unmount_to_daemon_mq_name;
114 char *daemon_to_unmount_mq_name;
115 mqd_t unmount_to_daemon_mq;
116 mqd_t daemon_to_unmount_mq;
126 init_wimfs_context(struct wimfs_context *ctx)
128 memset(ctx, 0, sizeof(*ctx));
129 ctx->unmount_to_daemon_mq = (mqd_t)-1;
130 ctx->daemon_to_unmount_mq = (mqd_t)-1;
131 INIT_LIST_HEAD(&ctx->staging_list);
134 #define WIMFS_CTX(fuse_ctx) ((struct wimfs_context*)(fuse_ctx)->private_data)
136 static inline struct wimfs_context *
139 return WIMFS_CTX(fuse_get_context());
142 static inline WIMStruct *
143 wimfs_get_WIMStruct()
145 return wimfs_get_context()->wim;
149 wimfs_ctx_readonly(const struct wimfs_context *ctx)
151 return (ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) == 0;
155 get_lookup_flags(const struct wimfs_context *ctx)
157 return ctx->default_lookup_flags;
160 /* Returns nonzero if write permission is requested on the file open flags */
162 flags_writable(int open_flags)
164 return open_flags & (O_RDWR | O_WRONLY);
168 * Allocate a file descriptor for a stream.
170 * @inode: inode containing the stream we're opening
171 * @stream_id: ID of the stream we're opening
172 * @lte: Lookup table entry for the stream (may be NULL)
173 * @fd_ret: Return the allocated file descriptor if successful.
174 * @readonly: True if this is a read-only mount.
176 * Return 0 iff successful or error code if unsuccessful.
179 alloc_wimfs_fd(struct wim_inode *inode,
181 struct wim_lookup_table_entry *lte,
182 struct wimfs_fd **fd_ret,
185 static const u16 fds_per_alloc = 8;
186 static const u16 max_fds = 0xffff;
189 pthread_mutex_lock(&inode->i_mutex);
191 DEBUG("Allocating fd for stream ID %u from inode %#"PRIx64" "
192 "(open = %u, allocated = %u)",
193 stream_id, inode->i_ino, inode->i_num_opened_fds,
194 inode->i_num_allocated_fds);
196 if (inode->i_num_opened_fds == inode->i_num_allocated_fds) {
197 struct wimfs_fd **fds;
200 if (inode->i_num_allocated_fds == max_fds) {
204 num_new_fds = min(fds_per_alloc,
205 max_fds - inode->i_num_allocated_fds);
207 fds = REALLOC(inode->i_fds,
208 (inode->i_num_allocated_fds + num_new_fds) *
209 sizeof(inode->i_fds[0]));
214 memset(&fds[inode->i_num_allocated_fds], 0,
215 num_new_fds * sizeof(fds[0]));
217 inode->i_num_allocated_fds += num_new_fds;
219 for (u16 i = 0; ; i++) {
220 if (!inode->i_fds[i]) {
221 struct wimfs_fd *fd = CALLOC(1, sizeof(*fd));
230 fd->stream_id = stream_id;
232 inode->i_fds[i] = fd;
233 inode->i_num_opened_fds++;
234 if (lte && !readonly)
235 lte->num_opened_fds++;
236 DEBUG("Allocated fd (idx = %u)", fd->idx);
242 pthread_mutex_unlock(&inode->i_mutex);
247 inode_put_fd(struct wim_inode *inode, struct wimfs_fd *fd)
249 wimlib_assert(inode != NULL);
251 pthread_mutex_lock(&inode->i_mutex);
253 wimlib_assert(fd->f_inode == inode);
254 wimlib_assert(inode->i_num_opened_fds != 0);
255 wimlib_assert(fd->idx < inode->i_num_allocated_fds);
256 wimlib_assert(inode->i_fds[fd->idx] == fd);
258 inode->i_fds[fd->idx] = NULL;
260 if (--inode->i_num_opened_fds == 0 && inode->i_nlink == 0) {
261 pthread_mutex_unlock(&inode->i_mutex);
264 pthread_mutex_unlock(&inode->i_mutex);
269 lte_put_fd(struct wim_lookup_table_entry *lte, struct wimfs_fd *fd)
271 wimlib_assert(fd->f_lte == lte);
273 if (!lte) /* Empty stream with no lookup table entry */
276 /* Close staging file descriptor if needed. */
278 if (lte->resource_location == RESOURCE_IN_STAGING_FILE
279 && fd->staging_fd != -1)
281 if (close(fd->staging_fd) != 0) {
282 ERROR_WITH_ERRNO("Failed to close staging file");
286 lte_decrement_num_opened_fds(lte);
290 /* Close a file descriptor. */
292 close_wimfs_fd(struct wimfs_fd *fd)
295 DEBUG("Closing fd (ino = %#"PRIx64", opened = %u, allocated = %u)",
296 fd->f_inode->i_ino, fd->f_inode->i_num_opened_fds,
297 fd->f_inode->i_num_allocated_fds);
298 ret = lte_put_fd(fd->f_lte, fd);
302 inode_put_fd(fd->f_inode, fd);
307 * Add a new dentry with a new inode to a WIM image.
309 * Returns 0 on success, or negative error number on failure.
312 create_dentry(struct fuse_context *fuse_ctx, const char *path,
313 mode_t mode, int attributes, struct wim_dentry **dentry_ret)
315 struct wim_dentry *parent;
316 struct wim_dentry *new;
317 const char *basename;
318 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
321 parent = get_parent_dentry(wimfs_ctx->wim, path);
325 if (!dentry_is_directory(parent))
328 basename = path_basename(path);
329 if (get_dentry_child_with_name(parent, basename))
332 ret = new_dentry_with_inode(basename, &new);
336 new->d_inode->i_resolved = 1;
337 new->d_inode->i_ino = wimfs_ctx->next_ino++;
338 new->d_inode->i_attributes = attributes;
340 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
341 if (inode_set_unix_data(new->d_inode,
344 mode & ~fuse_ctx->umask,
345 wimfs_ctx->wim->lookup_table,
346 UNIX_DATA_ALL | UNIX_DATA_CREATE))
352 dentry_add_child(parent, new);
353 hlist_add_head(&new->d_inode->i_hlist, wimfs_ctx->image_inode_list);
359 /* Remove a dentry from a mounted WIM image; i.e. remove an alias for the
360 * corresponding inode.
362 * If there are no remaining references to the inode either through dentries or
363 * open file descriptors, the inode is freed. Otherwise, the inode is not
364 * removed, but the dentry is unlinked and freed.
366 * Either way, all lookup table entries referenced by the inode have their
367 * reference count decremented. If a lookup table entry has no open file
368 * descriptors and no references remaining, it is freed, and the corresponding
369 * staging file is unlinked.
372 remove_dentry(struct wim_dentry *dentry,
373 struct wim_lookup_table *lookup_table)
375 struct wim_inode *inode = dentry->d_inode;
376 struct wim_lookup_table_entry *lte;
379 for (i = 0; i <= inode->i_num_ads; i++) {
380 lte = inode_stream_lte_resolved(inode, i);
382 lte_decrement_refcnt(lte, lookup_table);
384 unlink_dentry(dentry);
389 inode_default_unix_mode(const struct wim_inode *inode)
391 if (inode_is_symlink(inode))
392 return S_IFLNK | 0777;
393 else if (inode_is_directory(inode))
394 return S_IFDIR | 0777;
396 return S_IFREG | 0777;
399 /* Transfers file attributes from a struct wim_inode to a `stat' buffer.
401 * The lookup table entry tells us which stream in the inode we are statting.
402 * For a named data stream, everything returned is the same as the unnamed data
403 * stream except possibly the size and block count. */
405 inode_to_stbuf(const struct wim_inode *inode,
406 const struct wim_lookup_table_entry *lte,
409 const struct wimfs_context *ctx = wimfs_get_context();
411 memset(stbuf, 0, sizeof(struct stat));
412 stbuf->st_mode = inode_default_unix_mode(inode);
413 stbuf->st_uid = ctx->default_uid;
414 stbuf->st_gid = ctx->default_gid;
415 if (ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
416 struct wimlib_unix_data unix_data;
417 if (inode_get_unix_data(inode, &unix_data, NULL) == 0) {
418 stbuf->st_uid = unix_data.uid;
419 stbuf->st_gid = unix_data.gid;
420 stbuf->st_mode = unix_data.mode;
423 stbuf->st_ino = (ino_t)inode->i_ino;
424 stbuf->st_nlink = inode->i_nlink;
426 stbuf->st_size = wim_resource_size(lte);
429 #ifdef HAVE_STAT_NANOSECOND_PRECISION
430 stbuf->st_atim = wim_timestamp_to_timespec(inode->i_last_access_time);
431 stbuf->st_mtim = wim_timestamp_to_timespec(inode->i_last_write_time);
432 stbuf->st_ctim = stbuf->st_mtim;
434 stbuf->st_atime = wim_timestamp_to_unix(inode->i_last_access_time);
435 stbuf->st_mtime = wim_timestamp_to_unix(inode->i_last_write_time);
436 stbuf->st_ctime = stbuf->st_mtime;
438 stbuf->st_blocks = (stbuf->st_size + 511) / 512;
443 touch_inode(struct wim_inode *inode)
445 u64 now = get_wim_timestamp();
446 inode->i_last_access_time = now;
447 inode->i_last_write_time = now;
450 /* Creates a new staging file and returns its file descriptor opened for
453 * @name_ret: A location into which the a pointer to the newly allocated name of
454 * the staging file is stored.
456 * @ctx: Context for the WIM filesystem; this provides the name of the
459 * On success, returns the file descriptor for the staging file, opened for
460 * writing. On failure, returns -1 and sets errno.
463 create_staging_file(char **name_ret, struct wimfs_context *ctx)
471 static const size_t STAGING_FILE_NAME_LEN = 20;
473 name_len = ctx->staging_dir_name_len + 1 + STAGING_FILE_NAME_LEN;
474 name = MALLOC(name_len + 1);
482 memcpy(name, ctx->staging_dir_name, ctx->staging_dir_name_len);
483 name[ctx->staging_dir_name_len] = '/';
484 randomize_char_array_with_alnum(name + ctx->staging_dir_name_len + 1,
485 STAGING_FILE_NAME_LEN);
486 name[name_len] = '\0';
489 /* Just in case, verify that the randomly generated name doesn't name an
490 * existing file, and try again if so */
491 } while (stat(name, &stbuf) == 0);
493 if (errno != ENOENT) /* other error?! */
496 /* doesn't exist--- ok */
498 DEBUG("Creating staging file `%s'", name);
500 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0600);
512 * Extract a WIM resource to the staging directory.
514 * @inode: Inode that contains the stream we are extracting
516 * @stream_id: Identifier for the stream (it stays constant even if the indices
517 * of the stream entries are changed)
519 * @lte: Pointer to pointer to the lookup table entry for the stream we need to
520 * extract, or NULL if there was no lookup table entry present for the stream
522 * @size: Number of bytes of the stream we want to extract (this supports the
523 * wimfs_truncate() function). It may be more than the actual stream length, in
524 * which case the extra space is filled with zeroes.
526 * @ctx: Context for the WIM filesystem.
528 * Returns 0 on success or a negative error code on failure.
531 extract_resource_to_staging_dir(struct wim_inode *inode,
533 struct wim_lookup_table_entry **lte,
535 struct wimfs_context *ctx)
537 char *staging_file_name;
540 struct wim_lookup_table_entry *old_lte, *new_lte;
543 DEBUG("Extracting resource to staging dir: inode %"PRIu64", "
544 "stream id %"PRIu32, inode->i_ino, stream_id);
548 wimlib_assert(old_lte == NULL ||
549 old_lte->resource_location != RESOURCE_IN_STAGING_FILE);
551 /* Create the staging file */
552 fd = create_staging_file(&staging_file_name, ctx);
556 /* Extract the stream to the staging file (possibly truncated) */
558 extract_size = min(wim_resource_size(old_lte), size);
559 ret = extract_wim_resource_to_fd(old_lte, fd, extract_size);
565 /* In the case of truncate() to more than the file length, extend the
566 * file with zeroes by calling ftruncate() on the underlying staging
568 if (ret == 0 && size > extract_size)
569 ret = ftruncate(fd, size);
571 /* Close the staging file descriptor and check for errors. If there's
572 * an error, unlink the staging file. */
573 if (ret != 0 || close(fd) != 0) {
579 goto out_delete_staging_file;
582 /* Now deal with the lookup table entries. We may be able to re-use the
583 * existing entry, but we may have to create a new one instead. */
585 if (old_lte && inode->i_nlink == old_lte->refcnt) {
586 /* The reference count of the existing lookup table entry is the
587 * same as the link count of the inode that contains the stream
588 * we're opening. Therefore, ALL the references to the lookup
589 * table entry correspond to the stream we're trying to extract,
590 * so the lookup table entry can be re-used. */
591 DEBUG("Re-using lookup table entry");
592 lookup_table_unlink(ctx->wim->lookup_table, old_lte);
596 /* There's an existing lookup table entry, but its
597 * reference count is greater than the link count for
598 * the inode containing a stream we're opening.
599 * Therefore, we need to split the lookup table entry.
601 wimlib_assert(old_lte->refcnt > inode->i_nlink);
602 DEBUG("Splitting lookup table entry "
603 "(inode->i_nlink = %u, old_lte->refcnt = %u)",
604 inode->i_nlink, old_lte->refcnt);
607 new_lte = new_lookup_table_entry();
610 goto out_delete_staging_file;
613 /* There may already be open file descriptors to this stream if
614 * it's previously been opened read-only, but just now we're
615 * opening it read-write. Identify those file descriptors and
616 * change their lookup table entry pointers to point to the new
617 * lookup table entry, and open staging file descriptors for
620 * At the same time, we need to count the number of these opened
621 * file descriptors to the new lookup table entry. If there's
622 * an old lookup table entry, this number needs to be subtracted
623 * from the fd's opened to the old entry. */
624 for (u16 i = 0, j = 0; j < inode->i_num_opened_fds; i++) {
625 struct wimfs_fd *fd = inode->i_fds[i];
627 if (fd->stream_id == stream_id) {
628 wimlib_assert(fd->f_lte == old_lte);
629 wimlib_assert(fd->staging_fd == -1);
631 new_lte->num_opened_fds++;
632 fd->staging_fd = open(staging_file_name, O_RDONLY);
633 if (fd->staging_fd == -1) {
635 goto out_revert_fd_changes;
641 DEBUG("%hu fd's were already opened to the file we extracted",
642 new_lte->num_opened_fds);
644 old_lte->num_opened_fds -= new_lte->num_opened_fds;
645 old_lte->refcnt -= inode->i_nlink;
649 new_lte->refcnt = inode->i_nlink;
650 new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
651 new_lte->staging_file_name = staging_file_name;
652 new_lte->lte_inode = inode;
655 inode->i_lte = new_lte;
657 for (u16 i = 0; i < inode->i_num_ads; i++)
658 if (inode->i_ads_entries[i].stream_id == stream_id)
659 inode->i_ads_entries[i].lte = new_lte;
661 lookup_table_insert_unhashed(ctx->wim->lookup_table, new_lte);
662 list_add_tail(&new_lte->staging_list, &ctx->staging_list);
665 out_revert_fd_changes:
666 for (u16 i = 0, j = 0; j < new_lte->num_opened_fds; i++) {
667 struct wimfs_fd *fd = inode->i_fds[i];
668 if (fd && fd->stream_id == stream_id && fd->f_lte == new_lte) {
670 if (fd->staging_fd != -1) {
671 close(fd->staging_fd);
677 free_lookup_table_entry(new_lte);
678 out_delete_staging_file:
679 unlink(staging_file_name);
680 FREE(staging_file_name);
685 * Creates a randomly named staging directory and saves its name in the
686 * filesystem context structure.
689 make_staging_dir(struct wimfs_context *ctx, const char *user_prefix)
691 static const size_t random_suffix_len = 10;
692 static const char *common_suffix = ".staging";
693 static const size_t common_suffix_len = 8;
695 char *staging_dir_name = NULL;
696 size_t staging_dir_name_len;
698 const char *wim_basename;
699 char *real_user_prefix = NULL;
703 real_user_prefix = realpath(user_prefix, NULL);
704 if (!real_user_prefix) {
705 ERROR_WITH_ERRNO("Could not resolve `%s'",
707 ret = WIMLIB_ERR_NOTDIR;
710 wim_basename = path_basename(ctx->wim->filename);
711 prefix_len = strlen(real_user_prefix) + 1 + strlen(wim_basename);
713 prefix_len = strlen(ctx->wim->filename);
716 staging_dir_name_len = prefix_len + common_suffix_len + random_suffix_len;
718 staging_dir_name = MALLOC(staging_dir_name_len + 1);
719 if (!staging_dir_name) {
720 ret = WIMLIB_ERR_NOMEM;
724 if (real_user_prefix)
725 sprintf(staging_dir_name, "%s/%s", real_user_prefix, wim_basename);
727 strcpy(staging_dir_name, ctx->wim->filename);
729 strcat(staging_dir_name, common_suffix);
731 randomize_char_array_with_alnum(staging_dir_name + prefix_len + common_suffix_len,
734 staging_dir_name[staging_dir_name_len] = '\0';
736 if (mkdir(staging_dir_name, 0700) != 0) {
737 ERROR_WITH_ERRNO("Failed to create temporary directory `%s'",
739 ret = WIMLIB_ERR_MKDIR;
744 FREE(real_user_prefix);
746 ctx->staging_dir_name = staging_dir_name;
747 ctx->staging_dir_name_len = staging_dir_name_len;
749 FREE(staging_dir_name);
755 remove_file_or_directory(const char *fpath, const struct stat *sb,
756 int typeflag, struct FTW *ftwbuf)
758 if (remove(fpath) == 0)
761 ERROR_WITH_ERRNO("Cannot remove `%s'", fpath);
762 return WIMLIB_ERR_DELETE_STAGING_DIR;
767 * Deletes the staging directory and all the files contained in it.
770 delete_staging_dir(struct wimfs_context *ctx)
773 ret = nftw(ctx->staging_dir_name, remove_file_or_directory,
775 FREE(ctx->staging_dir_name);
776 ctx->staging_dir_name = NULL;
781 inode_update_lte_ptr(struct wim_inode *inode,
782 struct wim_lookup_table_entry *old_lte,
783 struct wim_lookup_table_entry *new_lte)
785 if (inode->i_lte == old_lte) {
786 inode->i_lte = new_lte;
788 for (unsigned i = 0; i < inode->i_num_ads; i++) {
789 if (inode->i_ads_entries[i].lte == old_lte) {
790 inode->i_ads_entries[i].lte = new_lte;
798 free_lte_if_unneeded(struct wim_lookup_table_entry *lte)
801 if (wim_resource_size(lte) == 0) {
802 /* Zero-length stream. No lookup table entry needed. */
803 inode_update_lte_ptr(lte->lte_inode, lte, NULL);
804 free_lookup_table_entry(lte);
809 inode_close_fds(struct wim_inode *inode)
811 u16 num_opened_fds = inode->i_num_opened_fds;
812 for (u16 i = 0, j = 0; j < num_opened_fds; i++) {
813 struct wimfs_fd *fd = inode->i_fds[i];
815 wimlib_assert(fd->f_inode == inode);
816 int ret = close_wimfs_fd(fd);
825 /* Overwrites the WIM file, with changes saved. */
827 rebuild_wim(struct wimfs_context *ctx, int write_flags,
828 wimlib_progress_func_t progress_func)
831 struct wim_lookup_table_entry *lte, *tmp;
832 WIMStruct *w = ctx->wim;
834 DEBUG("Closing all staging file descriptors.");
835 list_for_each_entry_safe(lte, tmp, &ctx->staging_list, staging_list) {
836 ret = inode_close_fds(lte->lte_inode);
841 DEBUG("Freeing entries for zero-length streams");
842 list_for_each_entry_safe(lte, tmp, &ctx->staging_list, staging_list)
843 free_lte_if_unneeded(lte);
845 xml_update_image_info(w, w->current_image);
846 list_splice(&ctx->staging_list,
847 &w->image_metadata[w->current_image - 1].unhashed_streams);
848 ret = wimlib_overwrite(w, write_flags, 0, progress_func);
850 ERROR("Failed to commit changes to mounted WIM image");
854 /* Simple function that returns the concatenation of 2 strings. */
856 strcat_dup(const char *s1, const char *s2, size_t max_len)
858 size_t len = strlen(s1) + strlen(s2);
861 char *p = MALLOC(len + 1);
864 snprintf(p, len + 1, "%s%s", s1, s2);
869 set_message_queue_names(struct wimfs_context *ctx, const char *mount_dir)
871 static const char *u2d_prefix = "/wimlib-unmount-to-daemon-mq";
872 static const char *d2u_prefix = "/wimlib-daemon-to-unmount-mq";
877 dir_path = realpath(mount_dir, NULL);
879 ERROR_WITH_ERRNO("Failed to resolve path \"%s\"", mount_dir);
881 return WIMLIB_ERR_NOMEM;
883 return WIMLIB_ERR_NOTDIR;
886 for (p = dir_path; *p; p++)
890 ctx->unmount_to_daemon_mq_name = strcat_dup(u2d_prefix, dir_path,
892 if (!ctx->unmount_to_daemon_mq_name) {
893 ret = WIMLIB_ERR_NOMEM;
894 goto out_free_dir_path;
896 ctx->daemon_to_unmount_mq_name = strcat_dup(d2u_prefix, dir_path,
898 if (!ctx->daemon_to_unmount_mq_name) {
899 ret = WIMLIB_ERR_NOMEM;
900 goto out_free_unmount_to_daemon_mq_name;
904 goto out_free_dir_path;
905 out_free_unmount_to_daemon_mq_name:
906 FREE(ctx->unmount_to_daemon_mq_name);
907 ctx->unmount_to_daemon_mq_name = NULL;
914 free_message_queue_names(struct wimfs_context *ctx)
916 FREE(ctx->unmount_to_daemon_mq_name);
917 FREE(ctx->daemon_to_unmount_mq_name);
918 ctx->unmount_to_daemon_mq_name = NULL;
919 ctx->daemon_to_unmount_mq_name = NULL;
923 * Opens two POSIX message queue: one for sending messages from the unmount
924 * process to the daemon process, and one to go the other way. The names of the
925 * message queues, which must be system-wide unique, are be based on the mount
928 * @daemon specifies whether the calling process is the filesystem daemon or the
932 open_message_queues(struct wimfs_context *ctx, bool daemon)
934 int unmount_to_daemon_mq_flags = O_WRONLY | O_CREAT;
935 int daemon_to_unmount_mq_flags = O_RDONLY | O_CREAT;
941 swap(unmount_to_daemon_mq_flags, daemon_to_unmount_mq_flags);
947 orig_umask = umask(0000);
948 DEBUG("Opening message queue \"%s\"", ctx->unmount_to_daemon_mq_name);
949 ctx->unmount_to_daemon_mq = mq_open(ctx->unmount_to_daemon_mq_name,
950 unmount_to_daemon_mq_flags, mode, NULL);
952 if (ctx->unmount_to_daemon_mq == (mqd_t)-1) {
953 ERROR_WITH_ERRNO("mq_open()");
954 ret = WIMLIB_ERR_MQUEUE;
958 DEBUG("Opening message queue \"%s\"", ctx->daemon_to_unmount_mq_name);
959 ctx->daemon_to_unmount_mq = mq_open(ctx->daemon_to_unmount_mq_name,
960 daemon_to_unmount_mq_flags, mode, NULL);
962 if (ctx->daemon_to_unmount_mq == (mqd_t)-1) {
963 ERROR_WITH_ERRNO("mq_open()");
964 mq_close(ctx->unmount_to_daemon_mq);
965 mq_unlink(ctx->unmount_to_daemon_mq_name);
966 ctx->unmount_to_daemon_mq = (mqd_t)-1;
967 ret = WIMLIB_ERR_MQUEUE;
976 /* Try to determine the maximum message size of a message queue. The return
977 * value is the maximum message size, or a guess of 8192 bytes if it cannot be
980 mq_get_msgsize(mqd_t mq)
982 static const char *msgsize_max_file = "/proc/sys/fs/mqueue/msgsize_max";
987 if (mq_getattr(mq, &attr) == 0) {
988 msgsize = attr.mq_msgsize;
990 ERROR_WITH_ERRNO("mq_getattr()");
991 ERROR("Attempting to read %s", msgsize_max_file);
992 fp = fopen(msgsize_max_file, "rb");
994 if (fscanf(fp, "%ld", &msgsize) != 1) {
995 ERROR("Assuming message size of 8192");
1000 ERROR_WITH_ERRNO("Failed to open the file `%s'",
1002 ERROR("Assuming message size of 8192");
1010 get_mailbox(mqd_t mq, long needed_msgsize, long *msgsize_ret,
1016 msgsize = mq_get_msgsize(mq);
1018 if (msgsize < needed_msgsize) {
1019 ERROR("Message queue max size must be at least %ld!",
1021 return WIMLIB_ERR_MQUEUE;
1024 mailbox = MALLOC(msgsize);
1026 ERROR("Failed to allocate %ld bytes for mailbox", msgsize);
1027 return WIMLIB_ERR_NOMEM;
1029 *msgsize_ret = msgsize;
1030 *mailbox_ret = mailbox;
1035 unlink_message_queues(struct wimfs_context *ctx)
1037 mq_unlink(ctx->unmount_to_daemon_mq_name);
1038 mq_unlink(ctx->daemon_to_unmount_mq_name);
1041 /* Closes the message queues, which are allocated in static variables */
1043 close_message_queues(struct wimfs_context *ctx)
1045 DEBUG("Closing message queues");
1046 mq_close(ctx->unmount_to_daemon_mq);
1047 ctx->unmount_to_daemon_mq = (mqd_t)(-1);
1048 mq_close(ctx->daemon_to_unmount_mq);
1049 ctx->daemon_to_unmount_mq = (mqd_t)(-1);
1050 unlink_message_queues(ctx);
1054 struct unmount_msg_hdr {
1061 struct msg_unmount_request {
1062 struct unmount_msg_hdr hdr;
1064 u8 want_progress_messages;
1067 struct msg_daemon_info {
1068 struct unmount_msg_hdr hdr;
1073 struct msg_unmount_finished {
1074 struct unmount_msg_hdr hdr;
1078 struct msg_write_streams_progress {
1079 struct unmount_msg_hdr hdr;
1080 union wimlib_progress_info info;
1084 MSG_TYPE_UNMOUNT_REQUEST,
1085 MSG_TYPE_DAEMON_INFO,
1086 MSG_TYPE_WRITE_STREAMS_PROGRESS,
1087 MSG_TYPE_UNMOUNT_FINISHED,
1091 struct msg_handler_context_hdr {
1092 int timeout_seconds;
1095 struct unmount_msg_handler_context {
1096 struct msg_handler_context_hdr hdr;
1100 wimlib_progress_func_t progress_func;
1103 struct daemon_msg_handler_context {
1104 struct msg_handler_context_hdr hdr;
1105 struct wimfs_context *wimfs_ctx;
1109 send_unmount_request_msg(mqd_t mq, int unmount_flags, u8 want_progress_messages)
1111 DEBUG("Sending unmount request msg");
1112 struct msg_unmount_request msg = {
1114 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1115 .cur_version = WIMLIB_VERSION_CODE,
1116 .msg_type = MSG_TYPE_UNMOUNT_REQUEST,
1117 .msg_size = sizeof(msg),
1119 .unmount_flags = unmount_flags,
1120 .want_progress_messages = want_progress_messages,
1123 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1124 ERROR_WITH_ERRNO("Failed to communicate with filesystem daemon");
1125 return WIMLIB_ERR_MQUEUE;
1131 send_daemon_info_msg(mqd_t mq, pid_t pid, int mount_flags)
1133 DEBUG("Sending daemon info msg (pid = %d, mount_flags=%x)",
1136 struct msg_daemon_info msg = {
1138 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1139 .cur_version = WIMLIB_VERSION_CODE,
1140 .msg_type = MSG_TYPE_DAEMON_INFO,
1141 .msg_size = sizeof(msg),
1144 .mount_flags = mount_flags,
1146 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1147 ERROR_WITH_ERRNO("Failed to send daemon info to unmount process");
1148 return WIMLIB_ERR_MQUEUE;
1154 send_unmount_finished_msg(mqd_t mq, int status)
1156 DEBUG("Sending unmount finished msg");
1157 struct msg_unmount_finished msg = {
1159 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1160 .cur_version = WIMLIB_VERSION_CODE,
1161 .msg_type = MSG_TYPE_UNMOUNT_FINISHED,
1162 .msg_size = sizeof(msg),
1166 if (mq_send(mq, (void*)&msg, sizeof(msg), 1))
1167 ERROR_WITH_ERRNO("Failed to send status to unmount process");
1171 unmount_progress_func(enum wimlib_progress_msg msg,
1172 const union wimlib_progress_info *info)
1174 if (msg == WIMLIB_PROGRESS_MSG_WRITE_STREAMS) {
1175 struct msg_write_streams_progress msg = {
1177 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1178 .cur_version = WIMLIB_VERSION_CODE,
1179 .msg_type = MSG_TYPE_WRITE_STREAMS_PROGRESS,
1180 .msg_size = sizeof(msg),
1184 if (mq_send(wimfs_get_context()->daemon_to_unmount_mq,
1185 (void*)&msg, sizeof(msg), 1))
1187 ERROR_WITH_ERRNO("Failed to send progress information "
1188 "to unmount process");
1195 msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
1197 const struct msg_unmount_request *msg = _msg;
1198 struct daemon_msg_handler_context *handler_ctx = _handler_ctx;
1199 struct wimfs_context *wimfs_ctx;
1203 wimlib_progress_func_t progress_func;
1205 DEBUG("Handling unmount request msg");
1207 wimfs_ctx = handler_ctx->wimfs_ctx;
1208 if (msg->hdr.msg_size < sizeof(*msg)) {
1209 status = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1213 unmount_flags = msg->unmount_flags;
1214 if (msg->want_progress_messages)
1215 progress_func = unmount_progress_func;
1217 progress_func = NULL;
1219 ret = send_daemon_info_msg(wimfs_ctx->daemon_to_unmount_mq, getpid(),
1220 wimfs_ctx->mount_flags);
1226 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1227 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_COMMIT) {
1228 int write_flags = 0;
1229 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY)
1230 write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
1231 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_REBUILD)
1232 write_flags |= WIMLIB_WRITE_FLAG_REBUILD;
1233 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_RECOMPRESS)
1234 write_flags |= WIMLIB_WRITE_FLAG_RECOMPRESS;
1235 status = rebuild_wim(wimfs_ctx, write_flags,
1239 DEBUG("Read-only mount");
1244 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1245 ret = delete_staging_dir(wimfs_ctx);
1247 ERROR("Failed to delete the staging directory");
1252 wimfs_ctx->status = status;
1253 wimfs_ctx->have_status = true;
1254 return MSG_BREAK_LOOP;
1258 msg_daemon_info_handler(const void *_msg, void *_handler_ctx)
1260 const struct msg_daemon_info *msg = _msg;
1261 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1263 DEBUG("Handling daemon info msg");
1264 if (msg->hdr.msg_size < sizeof(*msg))
1265 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1266 handler_ctx->daemon_pid = msg->daemon_pid;
1267 handler_ctx->mount_flags = msg->mount_flags;
1268 handler_ctx->hdr.timeout_seconds = 1;
1269 DEBUG("pid of daemon is %d; mount flags were %#x",
1270 handler_ctx->daemon_pid,
1271 handler_ctx->mount_flags);
1276 msg_write_streams_progress_handler(const void *_msg, void *_handler_ctx)
1278 const struct msg_write_streams_progress *msg = _msg;
1279 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1281 if (msg->hdr.msg_size < sizeof(*msg))
1282 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1283 if (handler_ctx->progress_func) {
1284 handler_ctx->progress_func(WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
1291 msg_unmount_finished_handler(const void *_msg, void *_handler_ctx)
1293 const struct msg_unmount_finished *msg = _msg;
1294 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1296 DEBUG("Handling unmount finished message");
1297 if (msg->hdr.msg_size < sizeof(*msg))
1298 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1299 handler_ctx->status = msg->status;
1300 DEBUG("status is %d", handler_ctx->status);
1301 return MSG_BREAK_LOOP;
1305 unmount_timed_out_cb(void *_handler_ctx)
1307 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1309 if (handler_ctx->daemon_pid == 0) {
1312 kill(handler_ctx->daemon_pid, 0);
1313 if (errno == ESRCH) {
1316 DEBUG("Filesystem daemon is still alive... "
1317 "Waiting another %d seconds\n",
1318 handler_ctx->hdr.timeout_seconds);
1323 ERROR("The filesystem daemon has crashed! Changes to the "
1324 "WIM may not have been commited.");
1325 return WIMLIB_ERR_FILESYSTEM_DAEMON_CRASHED;
1329 daemon_timed_out_cb(void *_handler_ctx)
1331 ERROR("Timed out waiting for unmount request! "
1332 "Changes to the mounted WIM will not be committed.");
1333 return WIMLIB_ERR_TIMEOUT;
1336 typedef int (*msg_handler_t)(const void *_msg, void *_handler_ctx);
1338 struct msg_handler_callbacks {
1339 int (*timed_out)(void * _handler_ctx);
1340 msg_handler_t msg_handlers[MSG_TYPE_MAX];
1343 static const struct msg_handler_callbacks unmount_msg_handler_callbacks = {
1344 .timed_out = unmount_timed_out_cb,
1346 [MSG_TYPE_DAEMON_INFO] = msg_daemon_info_handler,
1347 [MSG_TYPE_WRITE_STREAMS_PROGRESS] = msg_write_streams_progress_handler,
1348 [MSG_TYPE_UNMOUNT_FINISHED] = msg_unmount_finished_handler,
1352 static const struct msg_handler_callbacks daemon_msg_handler_callbacks = {
1353 .timed_out = daemon_timed_out_cb,
1355 [MSG_TYPE_UNMOUNT_REQUEST] = msg_unmount_request_handler,
1360 receive_message(mqd_t mq,
1361 struct msg_handler_context_hdr *handler_ctx,
1362 const msg_handler_t msg_handlers[],
1363 long mailbox_size, void *mailbox)
1366 struct timespec timeout;
1367 ssize_t bytes_received;
1368 struct unmount_msg_hdr *hdr;
1371 gettimeofday(&now, NULL);
1372 timeout.tv_sec = now.tv_sec + handler_ctx->timeout_seconds;
1373 timeout.tv_nsec = now.tv_usec * 1000;
1375 bytes_received = mq_timedreceive(mq, mailbox,
1376 mailbox_size, NULL, &timeout);
1378 if (bytes_received == -1) {
1379 if (errno == ETIMEDOUT) {
1380 ret = WIMLIB_ERR_TIMEOUT;
1382 ERROR_WITH_ERRNO("mq_timedreceive()");
1383 ret = WIMLIB_ERR_MQUEUE;
1385 } else if (bytes_received < sizeof(*hdr) ||
1386 bytes_received != hdr->msg_size) {
1387 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1388 } else if (WIMLIB_VERSION_CODE < hdr->min_version) {
1389 /*ERROR("Cannot understand the received message. "*/
1390 /*"Please upgrade wimlib to at least v%d.%d.%d",*/
1391 /*WIMLIB_GET_MAJOR_VERSION(hdr->min_version),*/
1392 /*WIMLIB_GET_MINOR_VERSION(hdr->min_version),*/
1393 /*WIMLIB_GET_PATCH_VERSION(hdr->min_version));*/
1394 ret = MSG_VERSION_TOO_HIGH;
1395 } else if (hdr->msg_type >= MSG_TYPE_MAX) {
1396 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1397 } else if (msg_handlers[hdr->msg_type] == NULL) {
1398 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1400 ret = msg_handlers[hdr->msg_type](mailbox, handler_ctx);
1406 message_loop(mqd_t mq,
1407 const struct msg_handler_callbacks *callbacks,
1408 struct msg_handler_context_hdr *handler_ctx)
1410 static const size_t MAX_MSG_SIZE = 512;
1415 DEBUG("Entering message loop");
1417 ret = get_mailbox(mq, MAX_MSG_SIZE, &msgsize, &mailbox);
1421 ret = receive_message(mq, handler_ctx,
1422 callbacks->msg_handlers,
1424 if (ret == 0 || ret == MSG_VERSION_TOO_HIGH) {
1426 } else if (ret == MSG_BREAK_LOOP) {
1429 } else if (ret == WIMLIB_ERR_TIMEOUT) {
1430 if (callbacks->timed_out)
1431 ret = callbacks->timed_out(handler_ctx);
1437 ERROR_WITH_ERRNO("Error communicating with "
1438 "filesystem daemon");
1443 DEBUG("Exiting message loop");
1447 /* Execute `fusermount -u', which is installed setuid root, to unmount the WIM.
1449 * FUSE does not yet implement synchronous unmounts. This means that fusermount
1450 * -u will return before the filesystem daemon returns from wimfs_destroy().
1451 * This is partly what we want, because we need to send a message from this
1452 * process to the filesystem daemon telling whether --commit was specified or
1453 * not. However, after that, the unmount process must wait for the filesystem
1454 * daemon to finish writing the WIM file.
1457 execute_fusermount(const char *dir)
1465 ERROR_WITH_ERRNO("Failed to fork()");
1466 return WIMLIB_ERR_FORK;
1470 execlp("fusermount", "fusermount", "-u", dir, NULL);
1471 ERROR_WITH_ERRNO("Failed to execute `fusermount'");
1472 exit(WIMLIB_ERR_FUSERMOUNT);
1476 ret = waitpid(pid, &status, 0);
1478 ERROR_WITH_ERRNO("Failed to wait for fusermount process to "
1480 return WIMLIB_ERR_FUSERMOUNT;
1483 if (!WIFEXITED(status)) {
1484 ERROR("'fusermount' did not terminate normally!");
1485 return WIMLIB_ERR_FUSERMOUNT;
1488 status = WEXITSTATUS(status);
1493 if (status != WIMLIB_ERR_FUSERMOUNT)
1494 return WIMLIB_ERR_FUSERMOUNT;
1496 /* Try again, but with the `umount' program. This is required on other
1497 * FUSE implementations such as FreeBSD's that do not have a
1498 * `fusermount' program. */
1499 ERROR("Falling back to 'umount'. Note: you may need to be "
1500 "root for this to work");
1503 ERROR_WITH_ERRNO("Failed to fork()");
1504 return WIMLIB_ERR_FORK;
1508 execlp("umount", "umount", dir, NULL);
1509 ERROR_WITH_ERRNO("Failed to execute `umount'");
1510 exit(WIMLIB_ERR_FUSERMOUNT);
1514 ret = waitpid(pid, &status, 0);
1516 ERROR_WITH_ERRNO("Failed to wait for `umount' process to "
1518 return WIMLIB_ERR_FUSERMOUNT;
1521 ERROR("`umount' did not successfully complete");
1522 return WIMLIB_ERR_FUSERMOUNT;
1528 static int wimfs_access(const char *path, int mask)
1535 wimfs_chmod(const char *path, mode_t mask)
1537 struct wim_dentry *dentry;
1538 struct wimfs_context *ctx = wimfs_get_context();
1541 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1544 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1545 &dentry, NULL, NULL);
1549 ret = inode_set_unix_data(dentry->d_inode, ctx->default_uid,
1550 ctx->default_gid, mask,
1551 ctx->wim->lookup_table, UNIX_DATA_MODE);
1552 return ret ? -ENOMEM : 0;
1556 wimfs_chown(const char *path, uid_t uid, gid_t gid)
1558 struct wim_dentry *dentry;
1559 struct wimfs_context *ctx = wimfs_get_context();
1562 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1565 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1566 &dentry, NULL, NULL);
1570 ret = inode_set_unix_data(dentry->d_inode, uid, gid,
1571 inode_default_unix_mode(dentry->d_inode),
1572 ctx->wim->lookup_table,
1573 UNIX_DATA_UID | UNIX_DATA_GID);
1574 return ret ? -ENOMEM : 0;
1577 /* Called when the filesystem is unmounted. */
1579 wimfs_destroy(void *p)
1581 struct wimfs_context *wimfs_ctx = wimfs_get_context();
1582 if (open_message_queues(wimfs_ctx, true) == 0) {
1583 struct daemon_msg_handler_context handler_ctx = {
1585 .timeout_seconds = 5,
1587 .wimfs_ctx = wimfs_ctx,
1589 message_loop(wimfs_ctx->unmount_to_daemon_mq,
1590 &daemon_msg_handler_callbacks,
1596 static int wimfs_fallocate(const char *path, int mode,
1597 off_t offset, off_t len, struct fuse_file_info *fi)
1599 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1600 wimlib_assert(fd->staging_fd != -1);
1601 return fallocate(fd->staging_fd, mode, offset, len);
1607 wimfs_fgetattr(const char *path, struct stat *stbuf,
1608 struct fuse_file_info *fi)
1610 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1611 return inode_to_stbuf(fd->f_inode, fd->f_lte, stbuf);
1615 wimfs_ftruncate(const char *path, off_t size, struct fuse_file_info *fi)
1617 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1618 int ret = ftruncate(fd->staging_fd, size);
1621 touch_inode(fd->f_inode);
1622 fd->f_lte->resource_entry.original_size = size;
1627 * Fills in a `struct stat' that corresponds to a file or directory in the WIM.
1630 wimfs_getattr(const char *path, struct stat *stbuf)
1632 struct wim_dentry *dentry;
1633 struct wim_lookup_table_entry *lte;
1635 struct wimfs_context *ctx = wimfs_get_context();
1637 ret = lookup_resource(ctx->wim, path,
1638 get_lookup_flags(ctx) | LOOKUP_FLAG_DIRECTORY_OK,
1639 &dentry, <e, NULL);
1642 return inode_to_stbuf(dentry->d_inode, lte, stbuf);
1646 /* Read an alternate data stream through the XATTR interface, or get its size */
1648 wimfs_getxattr(const char *path, const char *name, char *value,
1652 struct wim_inode *inode;
1653 struct wim_ads_entry *ads_entry;
1655 struct wim_lookup_table_entry *lte;
1656 struct wimfs_context *ctx = wimfs_get_context();
1658 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1661 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
1665 inode = wim_pathname_to_inode(ctx->wim, path);
1669 ads_entry = inode_get_ads_entry(inode, name, NULL);
1673 lte = ads_entry->lte;
1674 res_size = wim_resource_size(lte);
1679 if (res_size > size)
1682 ret = read_full_resource_into_buf(lte, value, true);
1690 /* Create a hard link */
1692 wimfs_link(const char *to, const char *from)
1694 struct wim_dentry *from_dentry, *from_dentry_parent;
1695 const char *link_name;
1696 struct wim_inode *inode;
1697 struct wim_lookup_table_entry *lte;
1698 WIMStruct *w = wimfs_get_WIMStruct();
1702 inode = wim_pathname_to_inode(w, to);
1706 if (inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
1707 FILE_ATTRIBUTE_REPARSE_POINT))
1710 from_dentry_parent = get_parent_dentry(w, from);
1711 if (!from_dentry_parent)
1713 if (!dentry_is_directory(from_dentry_parent))
1716 link_name = path_basename(from);
1717 if (get_dentry_child_with_name(from_dentry_parent, link_name))
1720 ret = new_dentry(link_name, &from_dentry);
1724 inode_add_dentry(from_dentry, inode);
1725 from_dentry->d_inode = inode;
1728 for (i = 0; i <= inode->i_num_ads; i++) {
1729 lte = inode_stream_lte_resolved(inode, i);
1733 dentry_add_child(from_dentry_parent, from_dentry);
1739 wimfs_listxattr(const char *path, char *list, size_t size)
1742 struct wim_inode *inode;
1743 struct wimfs_context *ctx = wimfs_get_context();
1746 bool size_only = (size == 0);
1748 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1751 /* List alternate data streams, or get the list size */
1753 inode = wim_pathname_to_inode(ctx->wim, path);
1758 for (i = 0; i < inode->i_num_ads; i++) {
1759 char *stream_name_mbs;
1760 size_t stream_name_mbs_nbytes;
1763 ret = utf16le_to_tstr(inode->i_ads_entries[i].stream_name,
1764 inode->i_ads_entries[i].stream_name_nbytes,
1766 &stream_name_mbs_nbytes);
1770 needed_size = stream_name_mbs_nbytes + 6;
1772 if (needed_size > size) {
1773 FREE(stream_name_mbs);
1776 sprintf(p, "user.%s", stream_name_mbs);
1777 size -= needed_size;
1780 FREE(stream_name_mbs);
1787 /* Create a directory in the WIM image. */
1789 wimfs_mkdir(const char *path, mode_t mode)
1791 return create_dentry(fuse_get_context(), path, mode | S_IFDIR,
1792 FILE_ATTRIBUTE_DIRECTORY, NULL);
1795 /* Create a regular file or alternate data stream in the WIM image. */
1797 wimfs_mknod(const char *path, mode_t mode, dev_t rdev)
1799 const char *stream_name;
1800 struct fuse_context *fuse_ctx = fuse_get_context();
1801 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
1806 if ((wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
1807 && (stream_name = path_stream_name(path))) {
1808 /* Make an alternate data stream */
1809 struct wim_ads_entry *new_entry;
1810 struct wim_inode *inode;
1812 char *p = (char*)stream_name - 1;
1813 wimlib_assert(*p == ':');
1816 inode = wim_pathname_to_inode(wimfs_ctx->wim, path);
1819 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)
1821 if (inode_get_ads_entry(inode, stream_name, NULL))
1823 new_entry = inode_add_ads(inode, stream_name);
1828 /* Make a normal file (not an alternate data stream) */
1829 return create_dentry(fuse_ctx, path, mode | S_IFREG,
1830 FILE_ATTRIBUTE_NORMAL, NULL);
1836 wimfs_open(const char *path, struct fuse_file_info *fi)
1838 struct wim_dentry *dentry;
1839 struct wim_lookup_table_entry *lte;
1841 struct wimfs_fd *fd;
1842 struct wim_inode *inode;
1845 struct wimfs_context *ctx = wimfs_get_context();
1847 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
1848 &dentry, <e, &stream_idx);
1852 inode = dentry->d_inode;
1854 if (stream_idx == 0)
1857 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
1859 /* The file resource may be in the staging directory (read-write mounts
1860 * only) or in the WIM. If it's in the staging directory, we need to
1861 * open a native file descriptor for the corresponding file. Otherwise,
1862 * we can read the file resource directly from the WIM file if we are
1863 * opening it read-only, but we need to extract the resource to the
1864 * staging directory if we are opening it writable. */
1866 if (flags_writable(fi->flags) &&
1867 (!lte || lte->resource_location != RESOURCE_IN_STAGING_FILE)) {
1868 u64 size = (lte) ? wim_resource_size(lte) : 0;
1869 ret = extract_resource_to_staging_dir(inode, stream_id,
1875 ret = alloc_wimfs_fd(inode, stream_id, lte, &fd,
1876 wimfs_ctx_readonly(ctx));
1880 if (lte && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
1881 fd->staging_fd = open(lte->staging_file_name, fi->flags);
1882 if (fd->staging_fd == -1) {
1883 int errno_save = errno;
1888 fi->fh = (uintptr_t)fd;
1892 /* Opens a directory. */
1894 wimfs_opendir(const char *path, struct fuse_file_info *fi)
1896 struct wim_inode *inode;
1898 struct wimfs_fd *fd = NULL;
1899 struct wimfs_context *ctx = wimfs_get_context();
1900 WIMStruct *w = ctx->wim;
1902 inode = wim_pathname_to_inode(w, path);
1905 if (!inode_is_directory(inode))
1907 ret = alloc_wimfs_fd(inode, 0, NULL, &fd, wimfs_ctx_readonly(ctx));
1908 fi->fh = (uintptr_t)fd;
1914 * Read data from a file in the WIM or in the staging directory.
1917 wimfs_read(const char *path, char *buf, size_t size,
1918 off_t offset, struct fuse_file_info *fi)
1920 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1927 if (!fd->f_lte) /* Empty stream with no lookup table entry */
1930 res_size = wim_resource_size(fd->f_lte);
1931 if (offset > res_size)
1933 size = min(size, INT_MAX);
1934 size = min(size, res_size - offset);
1936 switch (fd->f_lte->resource_location) {
1937 case RESOURCE_IN_STAGING_FILE:
1938 ret = pread(fd->staging_fd, buf, size, offset);
1942 case RESOURCE_IN_WIM:
1943 if (read_partial_wim_resource_into_buf(fd->f_lte, size,
1948 case RESOURCE_IN_ATTACHED_BUFFER:
1949 memcpy(buf, fd->f_lte->attached_buffer + offset, size);
1953 ERROR("Invalid resource location");
1960 struct fill_params {
1962 fuse_fill_dir_t filler;
1966 dentry_fuse_fill(struct wim_dentry *dentry, void *arg)
1968 struct fill_params *fill_params = arg;
1970 char *file_name_mbs;
1971 size_t file_name_mbs_nbytes;
1974 ret = utf16le_to_tstr(dentry->file_name,
1975 dentry->file_name_nbytes,
1977 &file_name_mbs_nbytes);
1981 ret = fill_params->filler(fill_params->buf, file_name_mbs, NULL, 0);
1982 FREE(file_name_mbs);
1986 /* Fills in the entries of the directory specified by @path using the
1987 * FUSE-provided function @filler. */
1989 wimfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
1990 off_t offset, struct fuse_file_info *fi)
1992 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1993 struct wim_inode *inode;
1998 inode = fd->f_inode;
2000 struct fill_params fill_params = {
2005 filler(buf, ".", NULL, 0);
2006 filler(buf, "..", NULL, 0);
2008 return for_dentry_in_rbtree(inode->i_children.rb_node,
2009 dentry_fuse_fill, &fill_params);
2014 wimfs_readlink(const char *path, char *buf, size_t buf_len)
2016 struct wimfs_context *ctx = wimfs_get_context();
2017 struct wim_inode *inode = wim_pathname_to_inode(ctx->wim, path);
2021 if (!inode_is_symlink(inode))
2024 ret = inode_readlink(inode, buf, buf_len, ctx->wim, true);
2032 wimfs_release(const char *path, struct fuse_file_info *fi)
2034 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2035 return close_wimfs_fd(fd);
2038 /* Close a directory */
2040 wimfs_releasedir(const char *path, struct fuse_file_info *fi)
2042 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2043 return close_wimfs_fd(fd);
2047 /* Remove an alternate data stream through the XATTR interface */
2049 wimfs_removexattr(const char *path, const char *name)
2051 struct wim_inode *inode;
2052 struct wim_ads_entry *ads_entry;
2054 struct wimfs_context *ctx = wimfs_get_context();
2056 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2059 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2063 inode = wim_pathname_to_inode(ctx->wim, path);
2067 ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2070 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2075 /* Renames a file or directory. See rename (3) */
2077 wimfs_rename(const char *from, const char *to)
2079 struct wim_dentry *src;
2080 struct wim_dentry *dst;
2081 struct wim_dentry *parent_of_dst;
2082 WIMStruct *w = wimfs_get_WIMStruct();
2085 /* This rename() implementation currently only supports actual files
2086 * (not alternate data streams) */
2088 src = get_dentry(w, from);
2092 dst = get_dentry(w, to);
2095 /* Destination file exists */
2097 if (src == dst) /* Same file */
2100 if (!dentry_is_directory(src)) {
2101 /* Cannot rename non-directory to directory. */
2102 if (dentry_is_directory(dst))
2105 /* Cannot rename directory to a non-directory or a non-empty
2107 if (!dentry_is_directory(dst))
2109 if (inode_has_children(dst->d_inode))
2112 parent_of_dst = dst->parent;
2114 /* Destination does not exist */
2115 parent_of_dst = get_parent_dentry(w, to);
2119 if (!dentry_is_directory(parent_of_dst))
2123 ret = set_dentry_name(src, path_basename(to));
2127 remove_dentry(dst, w->lookup_table);
2129 dentry_add_child(parent_of_dst, src);
2133 /* Remove a directory */
2135 wimfs_rmdir(const char *path)
2137 struct wim_dentry *dentry;
2138 WIMStruct *w = wimfs_get_WIMStruct();
2140 dentry = get_dentry(w, path);
2144 if (!dentry_is_directory(dentry))
2147 if (dentry_has_children(dentry))
2150 remove_dentry(dentry, w->lookup_table);
2155 /* Write an alternate data stream through the XATTR interface */
2157 wimfs_setxattr(const char *path, const char *name,
2158 const char *value, size_t size, int flags)
2160 struct wim_ads_entry *existing_ads_entry;
2161 struct wim_inode *inode;
2163 struct wimfs_context *ctx = wimfs_get_context();
2166 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2169 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2173 inode = wim_pathname_to_inode(ctx->wim, path);
2177 existing_ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2178 if (existing_ads_entry) {
2179 if (flags & XATTR_CREATE)
2182 if (flags & XATTR_REPLACE)
2186 ret = inode_add_ads_with_data(inode, name, value,
2187 size, ctx->wim->lookup_table);
2189 if (existing_ads_entry)
2190 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2199 wimfs_symlink(const char *to, const char *from)
2201 struct fuse_context *fuse_ctx = fuse_get_context();
2202 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
2203 struct wim_dentry *dentry;
2206 ret = create_dentry(fuse_ctx, from, S_IFLNK | 0777,
2207 FILE_ATTRIBUTE_REPARSE_POINT, &dentry);
2209 dentry->d_inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
2210 if (inode_set_symlink(dentry->d_inode, to,
2211 wimfs_ctx->wim->lookup_table, NULL))
2213 remove_dentry(dentry, wimfs_ctx->wim->lookup_table);
2221 /* Reduce the size of a file */
2223 wimfs_truncate(const char *path, off_t size)
2225 struct wim_dentry *dentry;
2226 struct wim_lookup_table_entry *lte;
2230 struct wim_inode *inode;
2231 struct wimfs_context *ctx = wimfs_get_context();
2233 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2234 &dentry, <e, &stream_idx);
2239 if (lte == NULL && size == 0)
2242 inode = dentry->d_inode;
2243 if (stream_idx == 0)
2246 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
2248 if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
2249 ret = truncate(lte->staging_file_name, size);
2253 /* File in WIM. Extract it to the staging directory, but only
2254 * the first @size bytes of it. */
2255 ret = extract_resource_to_staging_dir(inode, stream_id,
2259 lte->resource_entry.original_size = size;
2263 /* Unlink a non-directory or alternate data stream */
2265 wimfs_unlink(const char *path)
2267 struct wim_dentry *dentry;
2268 struct wim_lookup_table_entry *lte;
2271 struct wimfs_context *ctx = wimfs_get_context();
2273 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2274 &dentry, <e, &stream_idx);
2279 if (stream_idx == 0)
2280 remove_dentry(dentry, ctx->wim->lookup_table);
2282 inode_remove_ads(dentry->d_inode, stream_idx - 1,
2283 ctx->wim->lookup_table);
2287 #ifdef HAVE_UTIMENSAT
2289 * Change the timestamp on a file dentry.
2291 * Note that alternate data streams do not have their own timestamps.
2294 wimfs_utimens(const char *path, const struct timespec tv[2])
2296 struct wim_dentry *dentry;
2297 struct wim_inode *inode;
2298 WIMStruct *w = wimfs_get_WIMStruct();
2300 dentry = get_dentry(w, path);
2303 inode = dentry->d_inode;
2305 if (tv[0].tv_nsec != UTIME_OMIT) {
2306 if (tv[0].tv_nsec == UTIME_NOW)
2307 inode->i_last_access_time = get_wim_timestamp();
2309 inode->i_last_access_time = timespec_to_wim_timestamp(tv[0]);
2311 if (tv[1].tv_nsec != UTIME_OMIT) {
2312 if (tv[1].tv_nsec == UTIME_NOW)
2313 inode->i_last_write_time = get_wim_timestamp();
2315 inode->i_last_write_time = timespec_to_wim_timestamp(tv[1]);
2319 #else /* HAVE_UTIMENSAT */
2321 wimfs_utime(const char *path, struct utimbuf *times)
2323 struct wim_dentry *dentry;
2324 struct wim_inode *inode;
2325 WIMStruct *w = wimfs_get_WIMStruct();
2327 dentry = get_dentry(w, path);
2330 inode = dentry->d_inode;
2332 inode->i_last_write_time = unix_timestamp_to_wim(times->modtime);
2333 inode->i_last_access_time = unix_timestamp_to_wim(times->actime);
2336 #endif /* !HAVE_UTIMENSAT */
2338 /* Writes to a file in the WIM filesystem.
2339 * It may be an alternate data stream, but here we don't even notice because we
2340 * just get a lookup table entry. */
2342 wimfs_write(const char *path, const char *buf, size_t size,
2343 off_t offset, struct fuse_file_info *fi)
2345 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2351 wimlib_assert(fd->f_lte != NULL);
2352 wimlib_assert(fd->f_lte->staging_file_name != NULL);
2353 wimlib_assert(fd->staging_fd != -1);
2354 wimlib_assert(fd->f_inode != NULL);
2356 /* Write the data. */
2357 ret = pwrite(fd->staging_fd, buf, size, offset);
2361 /* Update file size */
2362 if (offset + size > fd->f_lte->resource_entry.original_size)
2363 fd->f_lte->resource_entry.original_size = offset + size;
2365 /* Update timestamps */
2366 touch_inode(fd->f_inode);
2370 static struct fuse_operations wimfs_operations = {
2372 .access = wimfs_access,
2374 .chmod = wimfs_chmod,
2375 .chown = wimfs_chown,
2376 .destroy = wimfs_destroy,
2378 .fallocate = wimfs_fallocate,
2380 .fgetattr = wimfs_fgetattr,
2381 .ftruncate = wimfs_ftruncate,
2382 .getattr = wimfs_getattr,
2384 .getxattr = wimfs_getxattr,
2388 .listxattr = wimfs_listxattr,
2390 .mkdir = wimfs_mkdir,
2391 .mknod = wimfs_mknod,
2393 .opendir = wimfs_opendir,
2395 .readdir = wimfs_readdir,
2396 .readlink = wimfs_readlink,
2397 .release = wimfs_release,
2398 .releasedir = wimfs_releasedir,
2400 .removexattr = wimfs_removexattr,
2402 .rename = wimfs_rename,
2403 .rmdir = wimfs_rmdir,
2405 .setxattr = wimfs_setxattr,
2407 .symlink = wimfs_symlink,
2408 .truncate = wimfs_truncate,
2409 .unlink = wimfs_unlink,
2410 #ifdef HAVE_UTIMENSAT
2411 .utimens = wimfs_utimens,
2413 .utime = wimfs_utime,
2415 .write = wimfs_write,
2417 /* wimfs keeps file descriptor structures (struct wimfs_fd), so there is
2418 * no need to have the file path provided on operations such as read()
2419 * where only the file descriptor is needed. */
2420 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2421 .flag_nullpath_ok = 1,
2423 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 9)
2425 .flag_utime_omit_ok = 1,
2430 /* Mounts an image from a WIM file. */
2432 wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
2433 int mount_flags, WIMStruct **additional_swms,
2434 unsigned num_additional_swms,
2435 const char *staging_dir)
2441 struct wim_lookup_table *joined_tab, *wim_tab_save;
2442 struct wim_image_metadata *imd;
2443 struct wimfs_context ctx;
2444 struct hlist_node *cur_node;
2445 struct wim_inode *inode;
2447 DEBUG("Mount: wim = %p, image = %d, dir = %s, flags = %d, ",
2448 wim, image, dir, mount_flags);
2451 return WIMLIB_ERR_INVALID_PARAM;
2453 ret = verify_swm_set(wim, additional_swms, num_additional_swms);
2457 if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) && (wim->hdr.total_parts != 1)) {
2458 ERROR("Cannot mount a split WIM read-write");
2459 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
2462 if (num_additional_swms) {
2463 ret = new_joined_lookup_table(wim, additional_swms,
2464 num_additional_swms,
2468 wim_tab_save = wim->lookup_table;
2469 wim->lookup_table = joined_tab;
2472 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2473 ret = wim_run_full_verifications(wim);
2478 ret = select_wim_image(wim, image);
2482 DEBUG("Selected image %d", image);
2484 imd = wim_get_current_image_metadata(wim);
2486 if (imd->root_dentry->refcnt != 1) {
2487 ERROR("Cannot mount image that was just exported with "
2488 "wimlib_export_image()");
2489 ret = WIMLIB_ERR_INVALID_PARAM;
2493 if (imd->inode_list.first) /* May be unneeded? */
2494 imd->inode_list.first->pprev = &imd->inode_list.first;
2496 if (imd->modified) {
2497 ERROR("Cannot mount image that was added "
2498 "with wimlib_add_image()");
2499 ret = WIMLIB_ERR_INVALID_PARAM;
2503 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2504 ret = lock_wim(wim, wim->fp);
2509 /* Use default stream interface if one was not specified */
2510 if (!(mount_flags & (WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_NONE |
2511 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR |
2512 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)))
2513 mount_flags |= WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR;
2516 DEBUG("Initializing struct wimfs_context");
2517 init_wimfs_context(&ctx);
2519 ctx.mount_flags = mount_flags;
2520 ctx.image_inode_list = &imd->inode_list;
2521 ctx.default_uid = getuid();
2522 ctx.default_gid = getgid();
2523 if (mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
2524 ctx.default_lookup_flags = LOOKUP_FLAG_ADS_OK;
2526 DEBUG("Unlinking message queues in case they already exist");
2527 ret = set_message_queue_names(&ctx, dir);
2530 unlink_message_queues(&ctx);
2532 DEBUG("Preparing arguments to fuse_main()");
2534 dir_copy = STRDUP(dir);
2536 goto out_free_message_queue_names;
2539 argv[argc++] = "imagex";
2540 argv[argc++] = dir_copy;
2542 /* disable multi-threaded operation for read-write mounts */
2543 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
2544 argv[argc++] = "-s";
2546 if (mount_flags & WIMLIB_MOUNT_FLAG_DEBUG)
2547 argv[argc++] = "-d";
2550 * We provide the use_ino option to the FUSE mount because we are going
2551 * to assign inode numbers ourselves. */
2552 char optstring[256] =
2556 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2559 ",default_permissions"
2561 argv[argc++] = "-o";
2562 argv[argc++] = optstring;
2563 if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)) {
2564 /* Read-write mount. Make the staging directory */
2565 ret = make_staging_dir(&ctx, staging_dir);
2567 goto out_free_dir_copy;
2569 /* Read-only mount */
2570 strcat(optstring, ",ro");
2572 if (mount_flags & WIMLIB_MOUNT_FLAG_ALLOW_OTHER)
2573 strcat(optstring, ",allow_other");
2579 DEBUG("FUSE command line (argc = %d): ", argc);
2580 for (i = 0; i < argc; i++) {
2581 fputs(argv[i], stdout);
2589 /* Mark dentry tree as modified if read-write mount. */
2590 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2592 imd->has_been_mounted_rw = 1;
2595 /* Resolve the lookup table entries for every inode in the image, and
2596 * assign inode numbers */
2597 DEBUG("Resolving lookup table entries and assigning inode numbers");
2599 hlist_for_each_entry(inode, cur_node, &imd->inode_list, i_hlist) {
2600 inode_resolve_ltes(inode, wim->lookup_table);
2601 inode->i_ino = ctx.next_ino++;
2603 DEBUG("(next_ino = %"PRIu64")", ctx.next_ino);
2605 DEBUG("Calling fuse_main()");
2607 ret = fuse_main(argc, argv, &wimfs_operations, &ctx);
2609 DEBUG("Returned from fuse_main() (ret = %d)", ret);
2612 ret = WIMLIB_ERR_FUSE;
2614 if (ctx.have_status)
2617 ret = WIMLIB_ERR_TIMEOUT;
2619 if (ctx.daemon_to_unmount_mq != (mqd_t)(-1)) {
2620 send_unmount_finished_msg(ctx.daemon_to_unmount_mq, ret);
2621 close_message_queues(&ctx);
2624 /* Try to delete the staging directory if a deletion wasn't yet
2625 * attempted due to an earlier error */
2626 if (ctx.staging_dir_name)
2627 delete_staging_dir(&ctx);
2631 wim->wim_locked = 0;
2632 out_free_message_queue_names:
2633 free_message_queue_names(&ctx);
2635 if (num_additional_swms) {
2636 free_lookup_table(wim->lookup_table);
2637 wim->lookup_table = wim_tab_save;
2643 * Unmounts the WIM file that was previously mounted on @dir by using
2644 * wimlib_mount_image().
2647 wimlib_unmount_image(const char *dir, int unmount_flags,
2648 wimlib_progress_func_t progress_func)
2651 struct wimfs_context wimfs_ctx;
2653 init_wimfs_context(&wimfs_ctx);
2655 ret = set_message_queue_names(&wimfs_ctx, dir);
2659 ret = open_message_queues(&wimfs_ctx, false);
2661 goto out_free_message_queue_names;
2663 ret = send_unmount_request_msg(wimfs_ctx.unmount_to_daemon_mq,
2665 progress_func != NULL);
2667 goto out_close_message_queues;
2669 ret = execute_fusermount(dir);
2671 goto out_close_message_queues;
2673 struct unmount_msg_handler_context handler_ctx = {
2675 .timeout_seconds = 5,
2678 .progress_func = progress_func,
2681 ret = message_loop(wimfs_ctx.daemon_to_unmount_mq,
2682 &unmount_msg_handler_callbacks,
2685 ret = handler_ctx.status;
2686 out_close_message_queues:
2687 close_message_queues(&wimfs_ctx);
2688 out_free_message_queue_names:
2689 free_message_queue_names(&wimfs_ctx);
2694 #else /* WITH_FUSE */
2698 mount_unsupported_error()
2700 #if defined(__WIN32__)
2701 ERROR("Sorry-- Mounting WIM images is not supported on Windows!");
2703 ERROR("wimlib was compiled with --without-fuse, which disables support "
2704 "for mounting WIMs.");
2706 return WIMLIB_ERR_UNSUPPORTED;
2710 wimlib_unmount_image(const tchar *dir, int unmount_flags,
2711 wimlib_progress_func_t progress_func)
2713 return mount_unsupported_error();
2717 wimlib_mount_image(WIMStruct *wim, int image, const tchar *dir,
2718 int mount_flags, WIMStruct **additional_swms,
2719 unsigned num_additional_swms,
2720 const tchar *staging_dir)
2722 return mount_unsupported_error();
2725 #endif /* !WITH_FUSE */