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 inodes in the mounted image */
102 struct list_head *image_inode_list;
104 /* Name and message queue descriptors for message queues between the
105 * filesystem daemon process and the unmount process. These are used
106 * when the filesystem is unmounted and the process running
107 * wimlib_unmount_image() (i.e. the `imagex unmount' command) needs to
108 * communicate with the filesystem daemon running fuse_main() (i.e. the
109 * daemon created by the `imagex mount' or `imagex mountrw' commands */
110 char *unmount_to_daemon_mq_name;
111 char *daemon_to_unmount_mq_name;
112 mqd_t unmount_to_daemon_mq;
113 mqd_t daemon_to_unmount_mq;
123 init_wimfs_context(struct wimfs_context *ctx)
125 memset(ctx, 0, sizeof(*ctx));
126 ctx->unmount_to_daemon_mq = (mqd_t)-1;
127 ctx->daemon_to_unmount_mq = (mqd_t)-1;
130 #define WIMFS_CTX(fuse_ctx) ((struct wimfs_context*)(fuse_ctx)->private_data)
132 static inline struct wimfs_context *
135 return WIMFS_CTX(fuse_get_context());
138 static inline WIMStruct *
139 wimfs_get_WIMStruct()
141 return wimfs_get_context()->wim;
145 wimfs_ctx_readonly(const struct wimfs_context *ctx)
147 return (ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) == 0;
151 get_lookup_flags(const struct wimfs_context *ctx)
153 return ctx->default_lookup_flags;
156 /* Returns nonzero if write permission is requested on the file open flags */
158 flags_writable(int open_flags)
160 return open_flags & (O_RDWR | O_WRONLY);
164 * Allocate a file descriptor for a stream.
166 * @inode: inode containing the stream we're opening
167 * @stream_id: ID of the stream we're opening
168 * @lte: Lookup table entry for the stream (may be NULL)
169 * @fd_ret: Return the allocated file descriptor if successful.
170 * @readonly: True if this is a read-only mount.
172 * Return 0 iff successful or error code if unsuccessful.
175 alloc_wimfs_fd(struct wim_inode *inode,
177 struct wim_lookup_table_entry *lte,
178 struct wimfs_fd **fd_ret,
181 static const u16 fds_per_alloc = 8;
182 static const u16 max_fds = 0xffff;
185 pthread_mutex_lock(&inode->i_mutex);
187 DEBUG("Allocating fd for stream ID %u from inode %#"PRIx64" "
188 "(open = %u, allocated = %u)",
189 stream_id, inode->i_ino, inode->i_num_opened_fds,
190 inode->i_num_allocated_fds);
192 if (inode->i_num_opened_fds == inode->i_num_allocated_fds) {
193 struct wimfs_fd **fds;
196 if (inode->i_num_allocated_fds == max_fds) {
200 num_new_fds = min(fds_per_alloc,
201 max_fds - inode->i_num_allocated_fds);
203 fds = REALLOC(inode->i_fds,
204 (inode->i_num_allocated_fds + num_new_fds) *
205 sizeof(inode->i_fds[0]));
210 memset(&fds[inode->i_num_allocated_fds], 0,
211 num_new_fds * sizeof(fds[0]));
213 inode->i_num_allocated_fds += num_new_fds;
215 for (u16 i = 0; ; i++) {
216 if (!inode->i_fds[i]) {
217 struct wimfs_fd *fd = CALLOC(1, sizeof(*fd));
226 fd->stream_id = stream_id;
228 inode->i_fds[i] = fd;
229 inode->i_num_opened_fds++;
230 if (lte && !readonly)
231 lte->num_opened_fds++;
232 DEBUG("Allocated fd (idx = %u)", fd->idx);
238 pthread_mutex_unlock(&inode->i_mutex);
243 inode_put_fd(struct wim_inode *inode, struct wimfs_fd *fd)
245 wimlib_assert(inode != NULL);
247 pthread_mutex_lock(&inode->i_mutex);
249 wimlib_assert(fd->f_inode == inode);
250 wimlib_assert(inode->i_num_opened_fds != 0);
251 wimlib_assert(fd->idx < inode->i_num_allocated_fds);
252 wimlib_assert(inode->i_fds[fd->idx] == fd);
254 inode->i_fds[fd->idx] = NULL;
256 if (--inode->i_num_opened_fds == 0 && inode->i_nlink == 0) {
257 pthread_mutex_unlock(&inode->i_mutex);
260 pthread_mutex_unlock(&inode->i_mutex);
265 lte_put_fd(struct wim_lookup_table_entry *lte, struct wimfs_fd *fd)
267 wimlib_assert(fd->f_lte == lte);
269 if (!lte) /* Empty stream with no lookup table entry */
272 /* Close staging file descriptor if needed. */
274 if (lte->resource_location == RESOURCE_IN_STAGING_FILE
275 && fd->staging_fd != -1)
277 if (close(fd->staging_fd) != 0) {
278 ERROR_WITH_ERRNO("Failed to close staging file");
282 lte_decrement_num_opened_fds(lte);
286 /* Close a file descriptor. */
288 close_wimfs_fd(struct wimfs_fd *fd)
291 DEBUG("Closing fd (ino = %#"PRIx64", opened = %u, allocated = %u)",
292 fd->f_inode->i_ino, fd->f_inode->i_num_opened_fds,
293 fd->f_inode->i_num_allocated_fds);
294 ret = lte_put_fd(fd->f_lte, fd);
298 inode_put_fd(fd->f_inode, fd);
303 * Add a new dentry with a new inode to a WIM image.
305 * Returns 0 on success, or negative error number on failure.
308 create_dentry(struct fuse_context *fuse_ctx, const char *path,
309 mode_t mode, int attributes, struct wim_dentry **dentry_ret)
311 struct wim_dentry *parent;
312 struct wim_dentry *new;
313 const char *basename;
314 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
317 parent = get_parent_dentry(wimfs_ctx->wim, path);
321 if (!dentry_is_directory(parent))
324 basename = path_basename(path);
325 if (get_dentry_child_with_name(parent, basename))
328 ret = new_dentry_with_inode(basename, &new);
332 new->d_inode->i_resolved = 1;
333 new->d_inode->i_ino = wimfs_ctx->next_ino++;
334 new->d_inode->i_attributes = attributes;
336 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
337 if (inode_set_unix_data(new->d_inode,
340 mode & ~fuse_ctx->umask,
341 wimfs_ctx->wim->lookup_table,
342 UNIX_DATA_ALL | UNIX_DATA_CREATE))
348 dentry_add_child(parent, new);
349 list_add_tail(&new->d_inode->i_list, wimfs_ctx->image_inode_list);
355 /* Remove a dentry from a mounted WIM image; i.e. remove an alias for the
356 * corresponding inode.
358 * If there are no remaining references to the inode either through dentries or
359 * open file descriptors, the inode is freed. Otherwise, the inode is not
360 * removed, but the dentry is unlinked and freed.
362 * Either way, all lookup table entries referenced by the inode have their
363 * reference count decremented. If a lookup table entry has no open file
364 * descriptors and no references remaining, it is freed, and the corresponding
365 * staging file is unlinked.
368 remove_dentry(struct wim_dentry *dentry,
369 struct wim_lookup_table *lookup_table)
371 struct wim_inode *inode = dentry->d_inode;
372 struct wim_lookup_table_entry *lte;
375 for (i = 0; i <= inode->i_num_ads; i++) {
376 lte = inode_stream_lte_resolved(inode, i);
378 lte_decrement_refcnt(lte, lookup_table);
380 unlink_dentry(dentry);
385 inode_default_unix_mode(const struct wim_inode *inode)
387 if (inode_is_symlink(inode))
388 return S_IFLNK | 0777;
389 else if (inode_is_directory(inode))
390 return S_IFDIR | 0777;
392 return S_IFREG | 0777;
395 /* Transfers file attributes from a struct wim_inode to a `stat' buffer.
397 * The lookup table entry tells us which stream in the inode we are statting.
398 * For a named data stream, everything returned is the same as the unnamed data
399 * stream except possibly the size and block count. */
401 inode_to_stbuf(const struct wim_inode *inode,
402 const struct wim_lookup_table_entry *lte,
405 const struct wimfs_context *ctx = wimfs_get_context();
407 memset(stbuf, 0, sizeof(struct stat));
408 stbuf->st_mode = inode_default_unix_mode(inode);
409 stbuf->st_uid = ctx->default_uid;
410 stbuf->st_gid = ctx->default_gid;
411 if (ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
412 struct wimlib_unix_data unix_data;
413 if (inode_get_unix_data(inode, &unix_data, NULL) == 0) {
414 stbuf->st_uid = unix_data.uid;
415 stbuf->st_gid = unix_data.gid;
416 stbuf->st_mode = unix_data.mode;
419 stbuf->st_ino = (ino_t)inode->i_ino;
420 stbuf->st_nlink = inode->i_nlink;
422 stbuf->st_size = wim_resource_size(lte);
425 #ifdef HAVE_STAT_NANOSECOND_PRECISION
426 stbuf->st_atim = wim_timestamp_to_timespec(inode->i_last_access_time);
427 stbuf->st_mtim = wim_timestamp_to_timespec(inode->i_last_write_time);
428 stbuf->st_ctim = stbuf->st_mtim;
430 stbuf->st_atime = wim_timestamp_to_unix(inode->i_last_access_time);
431 stbuf->st_mtime = wim_timestamp_to_unix(inode->i_last_write_time);
432 stbuf->st_ctime = stbuf->st_mtime;
434 stbuf->st_blocks = (stbuf->st_size + 511) / 512;
439 touch_inode(struct wim_inode *inode)
441 u64 now = get_wim_timestamp();
442 inode->i_last_access_time = now;
443 inode->i_last_write_time = now;
446 /* Creates a new staging file and returns its file descriptor opened for
449 * @name_ret: A location into which the a pointer to the newly allocated name of
450 * the staging file is stored.
452 * @ctx: Context for the WIM filesystem; this provides the name of the
455 * On success, returns the file descriptor for the staging file, opened for
456 * writing. On failure, returns -1 and sets errno.
459 create_staging_file(char **name_ret, struct wimfs_context *ctx)
467 static const size_t STAGING_FILE_NAME_LEN = 20;
469 name_len = ctx->staging_dir_name_len + 1 + STAGING_FILE_NAME_LEN;
470 name = MALLOC(name_len + 1);
478 memcpy(name, ctx->staging_dir_name, ctx->staging_dir_name_len);
479 name[ctx->staging_dir_name_len] = '/';
480 randomize_char_array_with_alnum(name + ctx->staging_dir_name_len + 1,
481 STAGING_FILE_NAME_LEN);
482 name[name_len] = '\0';
485 /* Just in case, verify that the randomly generated name doesn't name an
486 * existing file, and try again if so */
487 } while (stat(name, &stbuf) == 0);
489 if (errno != ENOENT) /* other error?! */
492 /* doesn't exist--- ok */
494 DEBUG("Creating staging file `%s'", name);
496 fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0600);
508 * Extract a WIM resource to the staging directory.
510 * @inode: Inode that contains the stream we are extracting
512 * @stream_id: Identifier for the stream (it stays constant even if the indices
513 * of the stream entries are changed)
515 * @lte: Pointer to pointer to the lookup table entry for the stream we need to
516 * extract, or NULL if there was no lookup table entry present for the stream
518 * @size: Number of bytes of the stream we want to extract (this supports the
519 * wimfs_truncate() function). It may be more than the actual stream length, in
520 * which case the extra space is filled with zeroes.
522 * @ctx: Context for the WIM filesystem.
524 * Returns 0 on success or a negative error code on failure.
527 extract_resource_to_staging_dir(struct wim_inode *inode,
529 struct wim_lookup_table_entry **lte,
531 struct wimfs_context *ctx)
533 char *staging_file_name;
536 struct wim_lookup_table_entry *old_lte, *new_lte;
539 DEBUG("Extracting resource to staging dir: inode %"PRIu64", "
540 "stream id %"PRIu32, inode->i_ino, stream_id);
544 wimlib_assert(old_lte == NULL ||
545 old_lte->resource_location != RESOURCE_IN_STAGING_FILE);
547 /* Create the staging file */
548 fd = create_staging_file(&staging_file_name, ctx);
552 /* Extract the stream to the staging file (possibly truncated) */
554 extract_size = min(wim_resource_size(old_lte), size);
555 ret = extract_wim_resource_to_fd(old_lte, fd, extract_size);
561 /* In the case of truncate() to more than the file length, extend the
562 * file with zeroes by calling ftruncate() on the underlying staging
564 if (ret == 0 && size > extract_size)
565 ret = ftruncate(fd, size);
567 /* Close the staging file descriptor and check for errors. If there's
568 * an error, unlink the staging file. */
569 if (ret != 0 || close(fd) != 0) {
575 goto out_delete_staging_file;
578 /* Now deal with the lookup table entries. We may be able to re-use the
579 * existing entry, but we may have to create a new one instead. */
581 if (old_lte && inode->i_nlink == old_lte->refcnt) {
582 /* The reference count of the existing lookup table entry is the
583 * same as the link count of the inode that contains the stream
584 * we're opening. Therefore, ALL the references to the lookup
585 * table entry correspond to the stream we're trying to extract,
586 * so the lookup table entry can be re-used. */
587 DEBUG("Re-using lookup table entry");
588 lookup_table_unlink(ctx->wim->lookup_table, old_lte);
592 /* There's an existing lookup table entry, but its
593 * reference count is greater than the link count for
594 * the inode containing a stream we're opening.
595 * Therefore, we need to split the lookup table entry.
597 wimlib_assert(old_lte->refcnt > inode->i_nlink);
598 DEBUG("Splitting lookup table entry "
599 "(inode->i_nlink = %u, old_lte->refcnt = %u)",
600 inode->i_nlink, old_lte->refcnt);
603 new_lte = new_lookup_table_entry();
606 goto out_delete_staging_file;
609 /* There may already be open file descriptors to this stream if
610 * it's previously been opened read-only, but just now we're
611 * opening it read-write. Identify those file descriptors and
612 * change their lookup table entry pointers to point to the new
613 * lookup table entry, and open staging file descriptors for
616 * At the same time, we need to count the number of these opened
617 * file descriptors to the new lookup table entry. If there's
618 * an old lookup table entry, this number needs to be subtracted
619 * from the fd's opened to the old entry. */
620 for (u16 i = 0, j = 0; j < inode->i_num_opened_fds; i++) {
621 struct wimfs_fd *fd = inode->i_fds[i];
623 if (fd->stream_id == stream_id) {
624 wimlib_assert(fd->f_lte == old_lte);
625 wimlib_assert(fd->staging_fd == -1);
627 new_lte->num_opened_fds++;
628 fd->staging_fd = open(staging_file_name, O_RDONLY);
629 if (fd->staging_fd == -1) {
631 goto out_revert_fd_changes;
637 DEBUG("%hu fd's were already opened to the file we extracted",
638 new_lte->num_opened_fds);
640 old_lte->num_opened_fds -= new_lte->num_opened_fds;
641 old_lte->refcnt -= inode->i_nlink;
645 new_lte->refcnt = inode->i_nlink;
646 new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
647 new_lte->staging_file_name = staging_file_name;
648 new_lte->lte_inode = inode;
650 struct wim_lookup_table_entry **my_ptr;
652 if (stream_id == 0) {
653 my_ptr = &inode->i_lte;
655 for (u16 i = 0; ; i++) {
656 wimlib_assert(i < inode->i_num_ads);
657 if (inode->i_ads_entries[i].stream_id == stream_id) {
658 my_ptr = &inode->i_ads_entries[i].lte;
664 lookup_table_insert_unhashed(ctx->wim->lookup_table, new_lte, my_ptr);
667 out_revert_fd_changes:
668 for (u16 i = 0, j = 0; j < new_lte->num_opened_fds; i++) {
669 struct wimfs_fd *fd = inode->i_fds[i];
670 if (fd && fd->stream_id == stream_id && fd->f_lte == new_lte) {
672 if (fd->staging_fd != -1) {
673 close(fd->staging_fd);
679 free_lookup_table_entry(new_lte);
680 out_delete_staging_file:
681 unlink(staging_file_name);
682 FREE(staging_file_name);
687 * Creates a randomly named staging directory and saves its name in the
688 * filesystem context structure.
691 make_staging_dir(struct wimfs_context *ctx, const char *user_prefix)
693 static const size_t random_suffix_len = 10;
694 static const char *common_suffix = ".staging";
695 static const size_t common_suffix_len = 8;
697 char *staging_dir_name = NULL;
698 size_t staging_dir_name_len;
700 const char *wim_basename;
701 char *real_user_prefix = NULL;
705 real_user_prefix = realpath(user_prefix, NULL);
706 if (!real_user_prefix) {
707 ERROR_WITH_ERRNO("Could not resolve `%s'",
709 ret = WIMLIB_ERR_NOTDIR;
712 wim_basename = path_basename(ctx->wim->filename);
713 prefix_len = strlen(real_user_prefix) + 1 + strlen(wim_basename);
715 prefix_len = strlen(ctx->wim->filename);
718 staging_dir_name_len = prefix_len + common_suffix_len + random_suffix_len;
720 staging_dir_name = MALLOC(staging_dir_name_len + 1);
721 if (!staging_dir_name) {
722 ret = WIMLIB_ERR_NOMEM;
726 if (real_user_prefix)
727 sprintf(staging_dir_name, "%s/%s", real_user_prefix, wim_basename);
729 strcpy(staging_dir_name, ctx->wim->filename);
731 strcat(staging_dir_name, common_suffix);
733 randomize_char_array_with_alnum(staging_dir_name + prefix_len + common_suffix_len,
736 staging_dir_name[staging_dir_name_len] = '\0';
738 if (mkdir(staging_dir_name, 0700) != 0) {
739 ERROR_WITH_ERRNO("Failed to create temporary directory `%s'",
741 ret = WIMLIB_ERR_MKDIR;
746 FREE(real_user_prefix);
748 ctx->staging_dir_name = staging_dir_name;
749 ctx->staging_dir_name_len = staging_dir_name_len;
751 FREE(staging_dir_name);
757 remove_file_or_directory(const char *fpath, const struct stat *sb,
758 int typeflag, struct FTW *ftwbuf)
760 if (remove(fpath) == 0)
763 ERROR_WITH_ERRNO("Cannot remove `%s'", fpath);
764 return WIMLIB_ERR_DELETE_STAGING_DIR;
769 * Deletes the staging directory and all the files contained in it.
772 delete_staging_dir(struct wimfs_context *ctx)
775 ret = nftw(ctx->staging_dir_name, remove_file_or_directory,
777 FREE(ctx->staging_dir_name);
778 ctx->staging_dir_name = NULL;
783 inode_close_fds(struct wim_inode *inode)
785 u16 num_opened_fds = inode->i_num_opened_fds;
786 for (u16 i = 0, j = 0; j < num_opened_fds; i++) {
787 struct wimfs_fd *fd = inode->i_fds[i];
789 wimlib_assert(fd->f_inode == inode);
790 int ret = close_wimfs_fd(fd);
799 /* Overwrites the WIM file, with changes saved. */
801 rebuild_wim(struct wimfs_context *ctx, int write_flags,
802 wimlib_progress_func_t progress_func)
805 struct wim_lookup_table_entry *lte;
806 WIMStruct *w = ctx->wim;
807 struct wim_image_metadata *imd = wim_get_current_image_metadata(ctx->wim);
809 DEBUG("Closing all staging file descriptors.");
810 image_for_each_unhashed_stream(lte, imd) {
811 ret = inode_close_fds(lte->lte_inode);
816 DEBUG("Freeing entries for zero-length streams");
817 image_for_each_unhashed_stream(lte, imd) {
818 if (wim_resource_size(lte) == 0) {
820 free_lookup_table_entry(lte);
824 xml_update_image_info(w, w->current_image);
825 ret = wimlib_overwrite(w, write_flags, 0, progress_func);
827 ERROR("Failed to commit changes to mounted WIM image");
831 /* Simple function that returns the concatenation of 2 strings. */
833 strcat_dup(const char *s1, const char *s2, size_t max_len)
835 size_t len = strlen(s1) + strlen(s2);
838 char *p = MALLOC(len + 1);
841 snprintf(p, len + 1, "%s%s", s1, s2);
846 set_message_queue_names(struct wimfs_context *ctx, const char *mount_dir)
848 static const char *u2d_prefix = "/wimlib-unmount-to-daemon-mq";
849 static const char *d2u_prefix = "/wimlib-daemon-to-unmount-mq";
854 dir_path = realpath(mount_dir, NULL);
856 ERROR_WITH_ERRNO("Failed to resolve path \"%s\"", mount_dir);
858 return WIMLIB_ERR_NOMEM;
860 return WIMLIB_ERR_NOTDIR;
863 for (p = dir_path; *p; p++)
867 ctx->unmount_to_daemon_mq_name = strcat_dup(u2d_prefix, dir_path,
869 if (!ctx->unmount_to_daemon_mq_name) {
870 ret = WIMLIB_ERR_NOMEM;
871 goto out_free_dir_path;
873 ctx->daemon_to_unmount_mq_name = strcat_dup(d2u_prefix, dir_path,
875 if (!ctx->daemon_to_unmount_mq_name) {
876 ret = WIMLIB_ERR_NOMEM;
877 goto out_free_unmount_to_daemon_mq_name;
881 goto out_free_dir_path;
882 out_free_unmount_to_daemon_mq_name:
883 FREE(ctx->unmount_to_daemon_mq_name);
884 ctx->unmount_to_daemon_mq_name = NULL;
891 free_message_queue_names(struct wimfs_context *ctx)
893 FREE(ctx->unmount_to_daemon_mq_name);
894 FREE(ctx->daemon_to_unmount_mq_name);
895 ctx->unmount_to_daemon_mq_name = NULL;
896 ctx->daemon_to_unmount_mq_name = NULL;
900 * Opens two POSIX message queue: one for sending messages from the unmount
901 * process to the daemon process, and one to go the other way. The names of the
902 * message queues, which must be system-wide unique, are be based on the mount
905 * @daemon specifies whether the calling process is the filesystem daemon or the
909 open_message_queues(struct wimfs_context *ctx, bool daemon)
911 int unmount_to_daemon_mq_flags = O_WRONLY | O_CREAT;
912 int daemon_to_unmount_mq_flags = O_RDONLY | O_CREAT;
918 swap(unmount_to_daemon_mq_flags, daemon_to_unmount_mq_flags);
924 orig_umask = umask(0000);
925 DEBUG("Opening message queue \"%s\"", ctx->unmount_to_daemon_mq_name);
926 ctx->unmount_to_daemon_mq = mq_open(ctx->unmount_to_daemon_mq_name,
927 unmount_to_daemon_mq_flags, mode, NULL);
929 if (ctx->unmount_to_daemon_mq == (mqd_t)-1) {
930 ERROR_WITH_ERRNO("mq_open()");
931 ret = WIMLIB_ERR_MQUEUE;
935 DEBUG("Opening message queue \"%s\"", ctx->daemon_to_unmount_mq_name);
936 ctx->daemon_to_unmount_mq = mq_open(ctx->daemon_to_unmount_mq_name,
937 daemon_to_unmount_mq_flags, mode, NULL);
939 if (ctx->daemon_to_unmount_mq == (mqd_t)-1) {
940 ERROR_WITH_ERRNO("mq_open()");
941 mq_close(ctx->unmount_to_daemon_mq);
942 mq_unlink(ctx->unmount_to_daemon_mq_name);
943 ctx->unmount_to_daemon_mq = (mqd_t)-1;
944 ret = WIMLIB_ERR_MQUEUE;
953 /* Try to determine the maximum message size of a message queue. The return
954 * value is the maximum message size, or a guess of 8192 bytes if it cannot be
957 mq_get_msgsize(mqd_t mq)
959 static const char *msgsize_max_file = "/proc/sys/fs/mqueue/msgsize_max";
964 if (mq_getattr(mq, &attr) == 0) {
965 msgsize = attr.mq_msgsize;
967 ERROR_WITH_ERRNO("mq_getattr()");
968 ERROR("Attempting to read %s", msgsize_max_file);
969 fp = fopen(msgsize_max_file, "rb");
971 if (fscanf(fp, "%ld", &msgsize) != 1) {
972 ERROR("Assuming message size of 8192");
977 ERROR_WITH_ERRNO("Failed to open the file `%s'",
979 ERROR("Assuming message size of 8192");
987 get_mailbox(mqd_t mq, long needed_msgsize, long *msgsize_ret,
993 msgsize = mq_get_msgsize(mq);
995 if (msgsize < needed_msgsize) {
996 ERROR("Message queue max size must be at least %ld!",
998 return WIMLIB_ERR_MQUEUE;
1001 mailbox = MALLOC(msgsize);
1003 ERROR("Failed to allocate %ld bytes for mailbox", msgsize);
1004 return WIMLIB_ERR_NOMEM;
1006 *msgsize_ret = msgsize;
1007 *mailbox_ret = mailbox;
1012 unlink_message_queues(struct wimfs_context *ctx)
1014 mq_unlink(ctx->unmount_to_daemon_mq_name);
1015 mq_unlink(ctx->daemon_to_unmount_mq_name);
1018 /* Closes the message queues, which are allocated in static variables */
1020 close_message_queues(struct wimfs_context *ctx)
1022 DEBUG("Closing message queues");
1023 mq_close(ctx->unmount_to_daemon_mq);
1024 ctx->unmount_to_daemon_mq = (mqd_t)(-1);
1025 mq_close(ctx->daemon_to_unmount_mq);
1026 ctx->daemon_to_unmount_mq = (mqd_t)(-1);
1027 unlink_message_queues(ctx);
1031 struct unmount_msg_hdr {
1038 struct msg_unmount_request {
1039 struct unmount_msg_hdr hdr;
1041 u8 want_progress_messages;
1044 struct msg_daemon_info {
1045 struct unmount_msg_hdr hdr;
1050 struct msg_unmount_finished {
1051 struct unmount_msg_hdr hdr;
1055 struct msg_write_streams_progress {
1056 struct unmount_msg_hdr hdr;
1057 union wimlib_progress_info info;
1061 MSG_TYPE_UNMOUNT_REQUEST,
1062 MSG_TYPE_DAEMON_INFO,
1063 MSG_TYPE_WRITE_STREAMS_PROGRESS,
1064 MSG_TYPE_UNMOUNT_FINISHED,
1068 struct msg_handler_context_hdr {
1069 int timeout_seconds;
1072 struct unmount_msg_handler_context {
1073 struct msg_handler_context_hdr hdr;
1077 wimlib_progress_func_t progress_func;
1080 struct daemon_msg_handler_context {
1081 struct msg_handler_context_hdr hdr;
1082 struct wimfs_context *wimfs_ctx;
1086 send_unmount_request_msg(mqd_t mq, int unmount_flags, u8 want_progress_messages)
1088 DEBUG("Sending unmount request msg");
1089 struct msg_unmount_request msg = {
1091 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1092 .cur_version = WIMLIB_VERSION_CODE,
1093 .msg_type = MSG_TYPE_UNMOUNT_REQUEST,
1094 .msg_size = sizeof(msg),
1096 .unmount_flags = unmount_flags,
1097 .want_progress_messages = want_progress_messages,
1100 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1101 ERROR_WITH_ERRNO("Failed to communicate with filesystem daemon");
1102 return WIMLIB_ERR_MQUEUE;
1108 send_daemon_info_msg(mqd_t mq, pid_t pid, int mount_flags)
1110 DEBUG("Sending daemon info msg (pid = %d, mount_flags=%x)",
1113 struct msg_daemon_info msg = {
1115 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1116 .cur_version = WIMLIB_VERSION_CODE,
1117 .msg_type = MSG_TYPE_DAEMON_INFO,
1118 .msg_size = sizeof(msg),
1121 .mount_flags = mount_flags,
1123 if (mq_send(mq, (void*)&msg, sizeof(msg), 1)) {
1124 ERROR_WITH_ERRNO("Failed to send daemon info to unmount process");
1125 return WIMLIB_ERR_MQUEUE;
1131 send_unmount_finished_msg(mqd_t mq, int status)
1133 DEBUG("Sending unmount finished msg");
1134 struct msg_unmount_finished msg = {
1136 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1137 .cur_version = WIMLIB_VERSION_CODE,
1138 .msg_type = MSG_TYPE_UNMOUNT_FINISHED,
1139 .msg_size = sizeof(msg),
1143 if (mq_send(mq, (void*)&msg, sizeof(msg), 1))
1144 ERROR_WITH_ERRNO("Failed to send status to unmount process");
1148 unmount_progress_func(enum wimlib_progress_msg msg,
1149 const union wimlib_progress_info *info)
1151 if (msg == WIMLIB_PROGRESS_MSG_WRITE_STREAMS) {
1152 struct msg_write_streams_progress msg = {
1154 .min_version = WIMLIB_MAKEVERSION(1, 2, 1),
1155 .cur_version = WIMLIB_VERSION_CODE,
1156 .msg_type = MSG_TYPE_WRITE_STREAMS_PROGRESS,
1157 .msg_size = sizeof(msg),
1161 if (mq_send(wimfs_get_context()->daemon_to_unmount_mq,
1162 (void*)&msg, sizeof(msg), 1))
1164 ERROR_WITH_ERRNO("Failed to send progress information "
1165 "to unmount process");
1172 msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
1174 const struct msg_unmount_request *msg = _msg;
1175 struct daemon_msg_handler_context *handler_ctx = _handler_ctx;
1176 struct wimfs_context *wimfs_ctx;
1180 wimlib_progress_func_t progress_func;
1182 DEBUG("Handling unmount request msg");
1184 wimfs_ctx = handler_ctx->wimfs_ctx;
1185 if (msg->hdr.msg_size < sizeof(*msg)) {
1186 status = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1190 unmount_flags = msg->unmount_flags;
1191 if (msg->want_progress_messages)
1192 progress_func = unmount_progress_func;
1194 progress_func = NULL;
1196 ret = send_daemon_info_msg(wimfs_ctx->daemon_to_unmount_mq, getpid(),
1197 wimfs_ctx->mount_flags);
1203 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1204 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_COMMIT) {
1205 int write_flags = 0;
1206 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY)
1207 write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
1208 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_REBUILD)
1209 write_flags |= WIMLIB_WRITE_FLAG_REBUILD;
1210 if (unmount_flags & WIMLIB_UNMOUNT_FLAG_RECOMPRESS)
1211 write_flags |= WIMLIB_WRITE_FLAG_RECOMPRESS;
1212 status = rebuild_wim(wimfs_ctx, write_flags,
1216 DEBUG("Read-only mount");
1221 if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
1222 ret = delete_staging_dir(wimfs_ctx);
1224 ERROR("Failed to delete the staging directory");
1229 wimfs_ctx->status = status;
1230 wimfs_ctx->have_status = true;
1231 return MSG_BREAK_LOOP;
1235 msg_daemon_info_handler(const void *_msg, void *_handler_ctx)
1237 const struct msg_daemon_info *msg = _msg;
1238 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1240 DEBUG("Handling daemon info msg");
1241 if (msg->hdr.msg_size < sizeof(*msg))
1242 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1243 handler_ctx->daemon_pid = msg->daemon_pid;
1244 handler_ctx->mount_flags = msg->mount_flags;
1245 handler_ctx->hdr.timeout_seconds = 1;
1246 DEBUG("pid of daemon is %d; mount flags were %#x",
1247 handler_ctx->daemon_pid,
1248 handler_ctx->mount_flags);
1253 msg_write_streams_progress_handler(const void *_msg, void *_handler_ctx)
1255 const struct msg_write_streams_progress *msg = _msg;
1256 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1258 if (msg->hdr.msg_size < sizeof(*msg))
1259 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1260 if (handler_ctx->progress_func) {
1261 handler_ctx->progress_func(WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
1268 msg_unmount_finished_handler(const void *_msg, void *_handler_ctx)
1270 const struct msg_unmount_finished *msg = _msg;
1271 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1273 DEBUG("Handling unmount finished message");
1274 if (msg->hdr.msg_size < sizeof(*msg))
1275 return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1276 handler_ctx->status = msg->status;
1277 DEBUG("status is %d", handler_ctx->status);
1278 return MSG_BREAK_LOOP;
1282 unmount_timed_out_cb(void *_handler_ctx)
1284 struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
1286 if (handler_ctx->daemon_pid == 0) {
1289 kill(handler_ctx->daemon_pid, 0);
1290 if (errno == ESRCH) {
1293 DEBUG("Filesystem daemon is still alive... "
1294 "Waiting another %d seconds\n",
1295 handler_ctx->hdr.timeout_seconds);
1300 ERROR("The filesystem daemon has crashed! Changes to the "
1301 "WIM may not have been commited.");
1302 return WIMLIB_ERR_FILESYSTEM_DAEMON_CRASHED;
1306 daemon_timed_out_cb(void *_handler_ctx)
1308 ERROR("Timed out waiting for unmount request! "
1309 "Changes to the mounted WIM will not be committed.");
1310 return WIMLIB_ERR_TIMEOUT;
1313 typedef int (*msg_handler_t)(const void *_msg, void *_handler_ctx);
1315 struct msg_handler_callbacks {
1316 int (*timed_out)(void * _handler_ctx);
1317 msg_handler_t msg_handlers[MSG_TYPE_MAX];
1320 static const struct msg_handler_callbacks unmount_msg_handler_callbacks = {
1321 .timed_out = unmount_timed_out_cb,
1323 [MSG_TYPE_DAEMON_INFO] = msg_daemon_info_handler,
1324 [MSG_TYPE_WRITE_STREAMS_PROGRESS] = msg_write_streams_progress_handler,
1325 [MSG_TYPE_UNMOUNT_FINISHED] = msg_unmount_finished_handler,
1329 static const struct msg_handler_callbacks daemon_msg_handler_callbacks = {
1330 .timed_out = daemon_timed_out_cb,
1332 [MSG_TYPE_UNMOUNT_REQUEST] = msg_unmount_request_handler,
1337 receive_message(mqd_t mq,
1338 struct msg_handler_context_hdr *handler_ctx,
1339 const msg_handler_t msg_handlers[],
1340 long mailbox_size, void *mailbox)
1343 struct timespec timeout;
1344 ssize_t bytes_received;
1345 struct unmount_msg_hdr *hdr;
1348 gettimeofday(&now, NULL);
1349 timeout.tv_sec = now.tv_sec + handler_ctx->timeout_seconds;
1350 timeout.tv_nsec = now.tv_usec * 1000;
1352 bytes_received = mq_timedreceive(mq, mailbox,
1353 mailbox_size, NULL, &timeout);
1355 if (bytes_received == -1) {
1356 if (errno == ETIMEDOUT) {
1357 ret = WIMLIB_ERR_TIMEOUT;
1359 ERROR_WITH_ERRNO("mq_timedreceive()");
1360 ret = WIMLIB_ERR_MQUEUE;
1362 } else if (bytes_received < sizeof(*hdr) ||
1363 bytes_received != hdr->msg_size) {
1364 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1365 } else if (WIMLIB_VERSION_CODE < hdr->min_version) {
1366 /*ERROR("Cannot understand the received message. "*/
1367 /*"Please upgrade wimlib to at least v%d.%d.%d",*/
1368 /*WIMLIB_GET_MAJOR_VERSION(hdr->min_version),*/
1369 /*WIMLIB_GET_MINOR_VERSION(hdr->min_version),*/
1370 /*WIMLIB_GET_PATCH_VERSION(hdr->min_version));*/
1371 ret = MSG_VERSION_TOO_HIGH;
1372 } else if (hdr->msg_type >= MSG_TYPE_MAX) {
1373 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1374 } else if (msg_handlers[hdr->msg_type] == NULL) {
1375 ret = WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
1377 ret = msg_handlers[hdr->msg_type](mailbox, handler_ctx);
1383 message_loop(mqd_t mq,
1384 const struct msg_handler_callbacks *callbacks,
1385 struct msg_handler_context_hdr *handler_ctx)
1387 static const size_t MAX_MSG_SIZE = 512;
1392 DEBUG("Entering message loop");
1394 ret = get_mailbox(mq, MAX_MSG_SIZE, &msgsize, &mailbox);
1398 ret = receive_message(mq, handler_ctx,
1399 callbacks->msg_handlers,
1401 if (ret == 0 || ret == MSG_VERSION_TOO_HIGH) {
1403 } else if (ret == MSG_BREAK_LOOP) {
1406 } else if (ret == WIMLIB_ERR_TIMEOUT) {
1407 if (callbacks->timed_out)
1408 ret = callbacks->timed_out(handler_ctx);
1414 ERROR_WITH_ERRNO("Error communicating with "
1415 "filesystem daemon");
1420 DEBUG("Exiting message loop");
1424 /* Execute `fusermount -u', which is installed setuid root, to unmount the WIM.
1426 * FUSE does not yet implement synchronous unmounts. This means that fusermount
1427 * -u will return before the filesystem daemon returns from wimfs_destroy().
1428 * This is partly what we want, because we need to send a message from this
1429 * process to the filesystem daemon telling whether --commit was specified or
1430 * not. However, after that, the unmount process must wait for the filesystem
1431 * daemon to finish writing the WIM file.
1434 execute_fusermount(const char *dir)
1442 ERROR_WITH_ERRNO("Failed to fork()");
1443 return WIMLIB_ERR_FORK;
1447 execlp("fusermount", "fusermount", "-u", dir, NULL);
1448 ERROR_WITH_ERRNO("Failed to execute `fusermount'");
1449 exit(WIMLIB_ERR_FUSERMOUNT);
1453 ret = waitpid(pid, &status, 0);
1455 ERROR_WITH_ERRNO("Failed to wait for fusermount process to "
1457 return WIMLIB_ERR_FUSERMOUNT;
1460 if (!WIFEXITED(status)) {
1461 ERROR("'fusermount' did not terminate normally!");
1462 return WIMLIB_ERR_FUSERMOUNT;
1465 status = WEXITSTATUS(status);
1470 if (status != WIMLIB_ERR_FUSERMOUNT)
1471 return WIMLIB_ERR_FUSERMOUNT;
1473 /* Try again, but with the `umount' program. This is required on other
1474 * FUSE implementations such as FreeBSD's that do not have a
1475 * `fusermount' program. */
1476 ERROR("Falling back to 'umount'. Note: you may need to be "
1477 "root for this to work");
1480 ERROR_WITH_ERRNO("Failed to fork()");
1481 return WIMLIB_ERR_FORK;
1485 execlp("umount", "umount", dir, NULL);
1486 ERROR_WITH_ERRNO("Failed to execute `umount'");
1487 exit(WIMLIB_ERR_FUSERMOUNT);
1491 ret = waitpid(pid, &status, 0);
1493 ERROR_WITH_ERRNO("Failed to wait for `umount' process to "
1495 return WIMLIB_ERR_FUSERMOUNT;
1498 ERROR("`umount' did not successfully complete");
1499 return WIMLIB_ERR_FUSERMOUNT;
1505 static int wimfs_access(const char *path, int mask)
1512 wimfs_chmod(const char *path, mode_t mask)
1514 struct wim_dentry *dentry;
1515 struct wimfs_context *ctx = wimfs_get_context();
1518 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1521 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1522 &dentry, NULL, NULL);
1526 ret = inode_set_unix_data(dentry->d_inode, ctx->default_uid,
1527 ctx->default_gid, mask,
1528 ctx->wim->lookup_table, UNIX_DATA_MODE);
1529 return ret ? -ENOMEM : 0;
1533 wimfs_chown(const char *path, uid_t uid, gid_t gid)
1535 struct wim_dentry *dentry;
1536 struct wimfs_context *ctx = wimfs_get_context();
1539 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
1542 ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
1543 &dentry, NULL, NULL);
1547 ret = inode_set_unix_data(dentry->d_inode, uid, gid,
1548 inode_default_unix_mode(dentry->d_inode),
1549 ctx->wim->lookup_table,
1550 UNIX_DATA_UID | UNIX_DATA_GID);
1551 return ret ? -ENOMEM : 0;
1554 /* Called when the filesystem is unmounted. */
1556 wimfs_destroy(void *p)
1558 struct wimfs_context *wimfs_ctx = wimfs_get_context();
1559 if (open_message_queues(wimfs_ctx, true) == 0) {
1560 struct daemon_msg_handler_context handler_ctx = {
1562 .timeout_seconds = 5,
1564 .wimfs_ctx = wimfs_ctx,
1566 message_loop(wimfs_ctx->unmount_to_daemon_mq,
1567 &daemon_msg_handler_callbacks,
1573 static int wimfs_fallocate(const char *path, int mode,
1574 off_t offset, off_t len, struct fuse_file_info *fi)
1576 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1577 wimlib_assert(fd->staging_fd != -1);
1578 return fallocate(fd->staging_fd, mode, offset, len);
1584 wimfs_fgetattr(const char *path, struct stat *stbuf,
1585 struct fuse_file_info *fi)
1587 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1588 return inode_to_stbuf(fd->f_inode, fd->f_lte, stbuf);
1592 wimfs_ftruncate(const char *path, off_t size, struct fuse_file_info *fi)
1594 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1595 int ret = ftruncate(fd->staging_fd, size);
1598 touch_inode(fd->f_inode);
1599 fd->f_lte->resource_entry.original_size = size;
1604 * Fills in a `struct stat' that corresponds to a file or directory in the WIM.
1607 wimfs_getattr(const char *path, struct stat *stbuf)
1609 struct wim_dentry *dentry;
1610 struct wim_lookup_table_entry *lte;
1612 struct wimfs_context *ctx = wimfs_get_context();
1614 ret = lookup_resource(ctx->wim, path,
1615 get_lookup_flags(ctx) | LOOKUP_FLAG_DIRECTORY_OK,
1616 &dentry, <e, NULL);
1619 return inode_to_stbuf(dentry->d_inode, lte, stbuf);
1623 /* Read an alternate data stream through the XATTR interface, or get its size */
1625 wimfs_getxattr(const char *path, const char *name, char *value,
1629 struct wim_inode *inode;
1630 struct wim_ads_entry *ads_entry;
1632 struct wim_lookup_table_entry *lte;
1633 struct wimfs_context *ctx = wimfs_get_context();
1635 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1638 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
1642 inode = wim_pathname_to_inode(ctx->wim, path);
1646 ads_entry = inode_get_ads_entry(inode, name, NULL);
1650 lte = ads_entry->lte;
1651 res_size = wim_resource_size(lte);
1656 if (res_size > size)
1659 ret = read_full_resource_into_buf(lte, value, true);
1667 /* Create a hard link */
1669 wimfs_link(const char *to, const char *from)
1671 struct wim_dentry *from_dentry, *from_dentry_parent;
1672 const char *link_name;
1673 struct wim_inode *inode;
1674 WIMStruct *w = wimfs_get_WIMStruct();
1677 inode = wim_pathname_to_inode(w, to);
1681 if (inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
1682 FILE_ATTRIBUTE_REPARSE_POINT))
1685 from_dentry_parent = get_parent_dentry(w, from);
1686 if (!from_dentry_parent)
1688 if (!dentry_is_directory(from_dentry_parent))
1691 link_name = path_basename(from);
1692 if (get_dentry_child_with_name(from_dentry_parent, link_name))
1695 ret = new_dentry(link_name, &from_dentry);
1700 inode_ref_streams(inode);
1701 from_dentry->d_inode = inode;
1702 inode_add_dentry(from_dentry, inode);
1703 dentry_add_child(from_dentry_parent, from_dentry);
1709 wimfs_listxattr(const char *path, char *list, size_t size)
1712 struct wim_inode *inode;
1713 struct wimfs_context *ctx = wimfs_get_context();
1716 bool size_only = (size == 0);
1718 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
1721 /* List alternate data streams, or get the list size */
1723 inode = wim_pathname_to_inode(ctx->wim, path);
1728 for (i = 0; i < inode->i_num_ads; i++) {
1729 char *stream_name_mbs;
1730 size_t stream_name_mbs_nbytes;
1733 ret = utf16le_to_tstr(inode->i_ads_entries[i].stream_name,
1734 inode->i_ads_entries[i].stream_name_nbytes,
1736 &stream_name_mbs_nbytes);
1740 needed_size = stream_name_mbs_nbytes + 6;
1742 if (needed_size > size) {
1743 FREE(stream_name_mbs);
1746 sprintf(p, "user.%s", stream_name_mbs);
1747 size -= needed_size;
1750 FREE(stream_name_mbs);
1757 /* Create a directory in the WIM image. */
1759 wimfs_mkdir(const char *path, mode_t mode)
1761 return create_dentry(fuse_get_context(), path, mode | S_IFDIR,
1762 FILE_ATTRIBUTE_DIRECTORY, NULL);
1765 /* Create a regular file or alternate data stream in the WIM image. */
1767 wimfs_mknod(const char *path, mode_t mode, dev_t rdev)
1769 const char *stream_name;
1770 struct fuse_context *fuse_ctx = fuse_get_context();
1771 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
1776 if ((wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
1777 && (stream_name = path_stream_name(path))) {
1778 /* Make an alternate data stream */
1779 struct wim_ads_entry *new_entry;
1780 struct wim_inode *inode;
1782 char *p = (char*)stream_name - 1;
1783 wimlib_assert(*p == ':');
1786 inode = wim_pathname_to_inode(wimfs_ctx->wim, path);
1789 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)
1791 if (inode_get_ads_entry(inode, stream_name, NULL))
1793 new_entry = inode_add_ads(inode, stream_name);
1798 /* Make a normal file (not an alternate data stream) */
1799 return create_dentry(fuse_ctx, path, mode | S_IFREG,
1800 FILE_ATTRIBUTE_NORMAL, NULL);
1806 wimfs_open(const char *path, struct fuse_file_info *fi)
1808 struct wim_dentry *dentry;
1809 struct wim_lookup_table_entry *lte;
1811 struct wimfs_fd *fd;
1812 struct wim_inode *inode;
1815 struct wimfs_context *ctx = wimfs_get_context();
1817 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
1818 &dentry, <e, &stream_idx);
1822 inode = dentry->d_inode;
1824 if (stream_idx == 0)
1827 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
1829 /* The file resource may be in the staging directory (read-write mounts
1830 * only) or in the WIM. If it's in the staging directory, we need to
1831 * open a native file descriptor for the corresponding file. Otherwise,
1832 * we can read the file resource directly from the WIM file if we are
1833 * opening it read-only, but we need to extract the resource to the
1834 * staging directory if we are opening it writable. */
1836 if (flags_writable(fi->flags) &&
1837 (!lte || lte->resource_location != RESOURCE_IN_STAGING_FILE)) {
1838 u64 size = (lte) ? wim_resource_size(lte) : 0;
1839 ret = extract_resource_to_staging_dir(inode, stream_id,
1845 ret = alloc_wimfs_fd(inode, stream_id, lte, &fd,
1846 wimfs_ctx_readonly(ctx));
1850 if (lte && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
1851 fd->staging_fd = open(lte->staging_file_name, fi->flags);
1852 if (fd->staging_fd == -1) {
1853 int errno_save = errno;
1858 fi->fh = (uintptr_t)fd;
1862 /* Opens a directory. */
1864 wimfs_opendir(const char *path, struct fuse_file_info *fi)
1866 struct wim_inode *inode;
1868 struct wimfs_fd *fd = NULL;
1869 struct wimfs_context *ctx = wimfs_get_context();
1870 WIMStruct *w = ctx->wim;
1872 inode = wim_pathname_to_inode(w, path);
1875 if (!inode_is_directory(inode))
1877 ret = alloc_wimfs_fd(inode, 0, NULL, &fd, wimfs_ctx_readonly(ctx));
1878 fi->fh = (uintptr_t)fd;
1884 * Read data from a file in the WIM or in the staging directory.
1887 wimfs_read(const char *path, char *buf, size_t size,
1888 off_t offset, struct fuse_file_info *fi)
1890 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1897 if (!fd->f_lte) /* Empty stream with no lookup table entry */
1900 res_size = wim_resource_size(fd->f_lte);
1901 if (offset > res_size)
1903 size = min(size, INT_MAX);
1904 size = min(size, res_size - offset);
1906 switch (fd->f_lte->resource_location) {
1907 case RESOURCE_IN_STAGING_FILE:
1908 ret = pread(fd->staging_fd, buf, size, offset);
1912 case RESOURCE_IN_WIM:
1913 if (read_partial_wim_resource_into_buf(fd->f_lte, size,
1918 case RESOURCE_IN_ATTACHED_BUFFER:
1919 memcpy(buf, fd->f_lte->attached_buffer + offset, size);
1923 ERROR("Invalid resource location");
1930 struct fill_params {
1932 fuse_fill_dir_t filler;
1936 dentry_fuse_fill(struct wim_dentry *dentry, void *arg)
1938 struct fill_params *fill_params = arg;
1940 char *file_name_mbs;
1941 size_t file_name_mbs_nbytes;
1944 ret = utf16le_to_tstr(dentry->file_name,
1945 dentry->file_name_nbytes,
1947 &file_name_mbs_nbytes);
1951 ret = fill_params->filler(fill_params->buf, file_name_mbs, NULL, 0);
1952 FREE(file_name_mbs);
1956 /* Fills in the entries of the directory specified by @path using the
1957 * FUSE-provided function @filler. */
1959 wimfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
1960 off_t offset, struct fuse_file_info *fi)
1962 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
1963 struct wim_inode *inode;
1968 inode = fd->f_inode;
1970 struct fill_params fill_params = {
1975 filler(buf, ".", NULL, 0);
1976 filler(buf, "..", NULL, 0);
1978 return for_dentry_in_rbtree(inode->i_children.rb_node,
1979 dentry_fuse_fill, &fill_params);
1984 wimfs_readlink(const char *path, char *buf, size_t buf_len)
1986 struct wimfs_context *ctx = wimfs_get_context();
1987 struct wim_inode *inode = wim_pathname_to_inode(ctx->wim, path);
1991 if (!inode_is_symlink(inode))
1994 ret = inode_readlink(inode, buf, buf_len, ctx->wim, true);
2002 wimfs_release(const char *path, struct fuse_file_info *fi)
2004 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2005 return close_wimfs_fd(fd);
2008 /* Close a directory */
2010 wimfs_releasedir(const char *path, struct fuse_file_info *fi)
2012 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2013 return close_wimfs_fd(fd);
2017 /* Remove an alternate data stream through the XATTR interface */
2019 wimfs_removexattr(const char *path, const char *name)
2021 struct wim_inode *inode;
2022 struct wim_ads_entry *ads_entry;
2024 struct wimfs_context *ctx = wimfs_get_context();
2026 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2029 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2033 inode = wim_pathname_to_inode(ctx->wim, path);
2037 ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2040 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2045 /* Renames a file or directory. See rename (3) */
2047 wimfs_rename(const char *from, const char *to)
2049 struct wim_dentry *src;
2050 struct wim_dentry *dst;
2051 struct wim_dentry *parent_of_dst;
2052 WIMStruct *w = wimfs_get_WIMStruct();
2055 /* This rename() implementation currently only supports actual files
2056 * (not alternate data streams) */
2058 src = get_dentry(w, from);
2062 dst = get_dentry(w, to);
2065 /* Destination file exists */
2067 if (src == dst) /* Same file */
2070 if (!dentry_is_directory(src)) {
2071 /* Cannot rename non-directory to directory. */
2072 if (dentry_is_directory(dst))
2075 /* Cannot rename directory to a non-directory or a non-empty
2077 if (!dentry_is_directory(dst))
2079 if (inode_has_children(dst->d_inode))
2082 parent_of_dst = dst->parent;
2084 /* Destination does not exist */
2085 parent_of_dst = get_parent_dentry(w, to);
2089 if (!dentry_is_directory(parent_of_dst))
2093 ret = set_dentry_name(src, path_basename(to));
2097 remove_dentry(dst, w->lookup_table);
2099 dentry_add_child(parent_of_dst, src);
2103 /* Remove a directory */
2105 wimfs_rmdir(const char *path)
2107 struct wim_dentry *dentry;
2108 WIMStruct *w = wimfs_get_WIMStruct();
2110 dentry = get_dentry(w, path);
2114 if (!dentry_is_directory(dentry))
2117 if (dentry_has_children(dentry))
2120 remove_dentry(dentry, w->lookup_table);
2125 /* Write an alternate data stream through the XATTR interface */
2127 wimfs_setxattr(const char *path, const char *name,
2128 const char *value, size_t size, int flags)
2130 struct wim_ads_entry *existing_ads_entry;
2131 struct wim_inode *inode;
2133 struct wimfs_context *ctx = wimfs_get_context();
2136 if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
2139 if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
2143 inode = wim_pathname_to_inode(ctx->wim, path);
2147 existing_ads_entry = inode_get_ads_entry(inode, name, &ads_idx);
2148 if (existing_ads_entry) {
2149 if (flags & XATTR_CREATE)
2152 if (flags & XATTR_REPLACE)
2156 ret = inode_add_ads_with_data(inode, name, value,
2157 size, ctx->wim->lookup_table);
2159 if (existing_ads_entry)
2160 inode_remove_ads(inode, ads_idx, ctx->wim->lookup_table);
2169 wimfs_symlink(const char *to, const char *from)
2171 struct fuse_context *fuse_ctx = fuse_get_context();
2172 struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
2173 struct wim_dentry *dentry;
2176 ret = create_dentry(fuse_ctx, from, S_IFLNK | 0777,
2177 FILE_ATTRIBUTE_REPARSE_POINT, &dentry);
2179 dentry->d_inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
2180 if (inode_set_symlink(dentry->d_inode, to,
2181 wimfs_ctx->wim->lookup_table, NULL))
2183 remove_dentry(dentry, wimfs_ctx->wim->lookup_table);
2191 /* Reduce the size of a file */
2193 wimfs_truncate(const char *path, off_t size)
2195 struct wim_dentry *dentry;
2196 struct wim_lookup_table_entry *lte;
2200 struct wim_inode *inode;
2201 struct wimfs_context *ctx = wimfs_get_context();
2203 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2204 &dentry, <e, &stream_idx);
2209 if (lte == NULL && size == 0)
2212 inode = dentry->d_inode;
2213 if (stream_idx == 0)
2216 stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
2218 if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
2219 ret = truncate(lte->staging_file_name, size);
2223 /* File in WIM. Extract it to the staging directory, but only
2224 * the first @size bytes of it. */
2225 ret = extract_resource_to_staging_dir(inode, stream_id,
2229 lte->resource_entry.original_size = size;
2233 /* Unlink a non-directory or alternate data stream */
2235 wimfs_unlink(const char *path)
2237 struct wim_dentry *dentry;
2238 struct wim_lookup_table_entry *lte;
2241 struct wimfs_context *ctx = wimfs_get_context();
2243 ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
2244 &dentry, <e, &stream_idx);
2249 if (stream_idx == 0)
2250 remove_dentry(dentry, ctx->wim->lookup_table);
2252 inode_remove_ads(dentry->d_inode, stream_idx - 1,
2253 ctx->wim->lookup_table);
2257 #ifdef HAVE_UTIMENSAT
2259 * Change the timestamp on a file dentry.
2261 * Note that alternate data streams do not have their own timestamps.
2264 wimfs_utimens(const char *path, const struct timespec tv[2])
2266 struct wim_dentry *dentry;
2267 struct wim_inode *inode;
2268 WIMStruct *w = wimfs_get_WIMStruct();
2270 dentry = get_dentry(w, path);
2273 inode = dentry->d_inode;
2275 if (tv[0].tv_nsec != UTIME_OMIT) {
2276 if (tv[0].tv_nsec == UTIME_NOW)
2277 inode->i_last_access_time = get_wim_timestamp();
2279 inode->i_last_access_time = timespec_to_wim_timestamp(tv[0]);
2281 if (tv[1].tv_nsec != UTIME_OMIT) {
2282 if (tv[1].tv_nsec == UTIME_NOW)
2283 inode->i_last_write_time = get_wim_timestamp();
2285 inode->i_last_write_time = timespec_to_wim_timestamp(tv[1]);
2289 #else /* HAVE_UTIMENSAT */
2291 wimfs_utime(const char *path, struct utimbuf *times)
2293 struct wim_dentry *dentry;
2294 struct wim_inode *inode;
2295 WIMStruct *w = wimfs_get_WIMStruct();
2297 dentry = get_dentry(w, path);
2300 inode = dentry->d_inode;
2302 inode->i_last_write_time = unix_timestamp_to_wim(times->modtime);
2303 inode->i_last_access_time = unix_timestamp_to_wim(times->actime);
2306 #endif /* !HAVE_UTIMENSAT */
2308 /* Writes to a file in the WIM filesystem.
2309 * It may be an alternate data stream, but here we don't even notice because we
2310 * just get a lookup table entry. */
2312 wimfs_write(const char *path, const char *buf, size_t size,
2313 off_t offset, struct fuse_file_info *fi)
2315 struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
2321 wimlib_assert(fd->f_lte != NULL);
2322 wimlib_assert(fd->f_lte->staging_file_name != NULL);
2323 wimlib_assert(fd->staging_fd != -1);
2324 wimlib_assert(fd->f_inode != NULL);
2326 /* Write the data. */
2327 ret = pwrite(fd->staging_fd, buf, size, offset);
2331 /* Update file size */
2332 if (offset + size > fd->f_lte->resource_entry.original_size)
2333 fd->f_lte->resource_entry.original_size = offset + size;
2335 /* Update timestamps */
2336 touch_inode(fd->f_inode);
2340 static struct fuse_operations wimfs_operations = {
2342 .access = wimfs_access,
2344 .chmod = wimfs_chmod,
2345 .chown = wimfs_chown,
2346 .destroy = wimfs_destroy,
2348 .fallocate = wimfs_fallocate,
2350 .fgetattr = wimfs_fgetattr,
2351 .ftruncate = wimfs_ftruncate,
2352 .getattr = wimfs_getattr,
2354 .getxattr = wimfs_getxattr,
2358 .listxattr = wimfs_listxattr,
2360 .mkdir = wimfs_mkdir,
2361 .mknod = wimfs_mknod,
2363 .opendir = wimfs_opendir,
2365 .readdir = wimfs_readdir,
2366 .readlink = wimfs_readlink,
2367 .release = wimfs_release,
2368 .releasedir = wimfs_releasedir,
2370 .removexattr = wimfs_removexattr,
2372 .rename = wimfs_rename,
2373 .rmdir = wimfs_rmdir,
2375 .setxattr = wimfs_setxattr,
2377 .symlink = wimfs_symlink,
2378 .truncate = wimfs_truncate,
2379 .unlink = wimfs_unlink,
2380 #ifdef HAVE_UTIMENSAT
2381 .utimens = wimfs_utimens,
2383 .utime = wimfs_utime,
2385 .write = wimfs_write,
2387 /* wimfs keeps file descriptor structures (struct wimfs_fd), so there is
2388 * no need to have the file path provided on operations such as read()
2389 * where only the file descriptor is needed. */
2390 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2391 .flag_nullpath_ok = 1,
2393 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 9)
2395 .flag_utime_omit_ok = 1,
2400 /* Mounts an image from a WIM file. */
2402 wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
2403 int mount_flags, WIMStruct **additional_swms,
2404 unsigned num_additional_swms,
2405 const char *staging_dir)
2411 struct wim_lookup_table *joined_tab, *wim_tab_save;
2412 struct wim_image_metadata *imd;
2413 struct wimfs_context ctx;
2414 struct wim_inode *inode;
2416 DEBUG("Mount: wim = %p, image = %d, dir = %s, flags = %d, ",
2417 wim, image, dir, mount_flags);
2420 return WIMLIB_ERR_INVALID_PARAM;
2422 ret = verify_swm_set(wim, additional_swms, num_additional_swms);
2426 if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) && (wim->hdr.total_parts != 1)) {
2427 ERROR("Cannot mount a split WIM read-write");
2428 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
2431 if (num_additional_swms) {
2432 ret = new_joined_lookup_table(wim, additional_swms,
2433 num_additional_swms,
2437 wim_tab_save = wim->lookup_table;
2438 wim->lookup_table = joined_tab;
2441 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2442 ret = wim_run_full_verifications(wim);
2447 ret = select_wim_image(wim, image);
2451 DEBUG("Selected image %d", image);
2453 imd = wim_get_current_image_metadata(wim);
2455 if (imd->refcnt != 1) {
2456 ERROR("Cannot mount image that was just exported with "
2457 "wimlib_export_image()");
2458 ret = WIMLIB_ERR_INVALID_PARAM;
2462 if (imd->modified) {
2463 ERROR("Cannot mount image that was added "
2464 "with wimlib_add_image()");
2465 ret = WIMLIB_ERR_INVALID_PARAM;
2469 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2470 ret = lock_wim(wim, wim->fp);
2475 /* Use default stream interface if one was not specified */
2476 if (!(mount_flags & (WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_NONE |
2477 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR |
2478 WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)))
2479 mount_flags |= WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR;
2482 DEBUG("Initializing struct wimfs_context");
2483 init_wimfs_context(&ctx);
2485 ctx.mount_flags = mount_flags;
2486 ctx.image_inode_list = &imd->inode_list;
2487 ctx.default_uid = getuid();
2488 ctx.default_gid = getgid();
2489 ctx.wim->lookup_table->unhashed_streams = &imd->unhashed_streams;
2490 if (mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
2491 ctx.default_lookup_flags = LOOKUP_FLAG_ADS_OK;
2493 DEBUG("Unlinking message queues in case they already exist");
2494 ret = set_message_queue_names(&ctx, dir);
2497 unlink_message_queues(&ctx);
2499 DEBUG("Preparing arguments to fuse_main()");
2501 dir_copy = STRDUP(dir);
2503 goto out_free_message_queue_names;
2506 argv[argc++] = "imagex";
2507 argv[argc++] = dir_copy;
2509 /* disable multi-threaded operation for read-write mounts */
2510 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
2511 argv[argc++] = "-s";
2513 if (mount_flags & WIMLIB_MOUNT_FLAG_DEBUG)
2514 argv[argc++] = "-d";
2517 * We provide the use_ino option to the FUSE mount because we are going
2518 * to assign inode numbers ourselves. */
2519 char optstring[256] =
2523 #if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
2526 ",default_permissions"
2528 argv[argc++] = "-o";
2529 argv[argc++] = optstring;
2530 if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)) {
2531 /* Read-write mount. Make the staging directory */
2532 ret = make_staging_dir(&ctx, staging_dir);
2534 goto out_free_dir_copy;
2536 /* Read-only mount */
2537 strcat(optstring, ",ro");
2539 if (mount_flags & WIMLIB_MOUNT_FLAG_ALLOW_OTHER)
2540 strcat(optstring, ",allow_other");
2546 DEBUG("FUSE command line (argc = %d): ", argc);
2547 for (i = 0; i < argc; i++) {
2548 fputs(argv[i], stdout);
2556 /* Mark dentry tree as modified if read-write mount. */
2557 if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
2559 imd->has_been_mounted_rw = 1;
2562 /* Resolve the lookup table entries for every inode in the image, and
2563 * assign inode numbers */
2564 DEBUG("Resolving lookup table entries and assigning inode numbers");
2566 image_for_each_inode(inode, imd) {
2567 inode_resolve_ltes(inode, wim->lookup_table);
2568 inode->i_ino = ctx.next_ino++;
2570 DEBUG("(next_ino = %"PRIu64")", ctx.next_ino);
2572 DEBUG("Calling fuse_main()");
2574 ret = fuse_main(argc, argv, &wimfs_operations, &ctx);
2576 DEBUG("Returned from fuse_main() (ret = %d)", ret);
2579 ret = WIMLIB_ERR_FUSE;
2581 if (ctx.have_status)
2584 ret = WIMLIB_ERR_TIMEOUT;
2586 if (ctx.daemon_to_unmount_mq != (mqd_t)(-1)) {
2587 send_unmount_finished_msg(ctx.daemon_to_unmount_mq, ret);
2588 close_message_queues(&ctx);
2591 /* Try to delete the staging directory if a deletion wasn't yet
2592 * attempted due to an earlier error */
2593 if (ctx.staging_dir_name)
2594 delete_staging_dir(&ctx);
2598 wim->wim_locked = 0;
2599 out_free_message_queue_names:
2600 free_message_queue_names(&ctx);
2602 if (num_additional_swms) {
2603 free_lookup_table(wim->lookup_table);
2604 wim->lookup_table = wim_tab_save;
2610 * Unmounts the WIM file that was previously mounted on @dir by using
2611 * wimlib_mount_image().
2614 wimlib_unmount_image(const char *dir, int unmount_flags,
2615 wimlib_progress_func_t progress_func)
2618 struct wimfs_context wimfs_ctx;
2620 init_wimfs_context(&wimfs_ctx);
2622 ret = set_message_queue_names(&wimfs_ctx, dir);
2626 ret = open_message_queues(&wimfs_ctx, false);
2628 goto out_free_message_queue_names;
2630 ret = send_unmount_request_msg(wimfs_ctx.unmount_to_daemon_mq,
2632 progress_func != NULL);
2634 goto out_close_message_queues;
2636 ret = execute_fusermount(dir);
2638 goto out_close_message_queues;
2640 struct unmount_msg_handler_context handler_ctx = {
2642 .timeout_seconds = 5,
2645 .progress_func = progress_func,
2648 ret = message_loop(wimfs_ctx.daemon_to_unmount_mq,
2649 &unmount_msg_handler_callbacks,
2652 ret = handler_ctx.status;
2653 out_close_message_queues:
2654 close_message_queues(&wimfs_ctx);
2655 out_free_message_queue_names:
2656 free_message_queue_names(&wimfs_ctx);
2661 #else /* WITH_FUSE */
2665 mount_unsupported_error()
2667 #if defined(__WIN32__)
2668 ERROR("Sorry-- Mounting WIM images is not supported on Windows!");
2670 ERROR("wimlib was compiled with --without-fuse, which disables support "
2671 "for mounting WIMs.");
2673 return WIMLIB_ERR_UNSUPPORTED;
2677 wimlib_unmount_image(const tchar *dir, int unmount_flags,
2678 wimlib_progress_func_t progress_func)
2680 return mount_unsupported_error();
2684 wimlib_mount_image(WIMStruct *wim, int image, const tchar *dir,
2685 int mount_flags, WIMStruct **additional_swms,
2686 unsigned num_additional_swms,
2687 const tchar *staging_dir)
2689 return mount_unsupported_error();
2692 #endif /* !WITH_FUSE */