X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fmount_image.c;h=e1ff886f583d89298eacd851e3da8d61bf528dd6;hp=128e1736dcb21d3b157a6c7854a486618424f971;hb=b5b9681794d1f5f13350e3567f6f6e74f5c779cf;hpb=9e2571b03cd9c71d11b3dad9ea5dcfa43f50deb4

diff --git a/src/mount_image.c b/src/mount_image.c
index 128e1736..e1ff886f 100644
--- a/src/mount_image.c
+++ b/src/mount_image.c
@@ -8,7 +8,7 @@
  */
 
 /*
- * Copyright (C) 2012, 2013 Eric Biggers
+ * Copyright (C) 2012, 2013, 2014 Eric Biggers
  *
  * This file is part of wimlib, a library for working with WIM files.
  *
@@ -26,7 +26,12 @@
  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  */
 
-#include "wimlib_internal.h"
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include "wimlib.h"
+#include "wimlib/error.h"
 
 #ifdef WITH_FUSE
 
@@ -34,11 +39,20 @@
 #  error "FUSE mount not supported on Win32!  Please configure --without-fuse"
 #endif
 
-#include "buffer_io.h"
-#include "lookup_table.h"
-#include "sha1.h"
-#include "timestamp.h"
-#include "xml.h"
+#include "wimlib/encoding.h"
+#include "wimlib/file_io.h"
+#include "wimlib/dentry.h"
+#include "wimlib/inode.h"
+#include "wimlib/lookup_table.h"
+#include "wimlib/metadata.h"
+#include "wimlib/paths.h"
+#include "wimlib/progress.h"
+#include "wimlib/reparse.h"
+#include "wimlib/resource.h"
+#include "wimlib/timestamp.h"
+#include "wimlib/version.h"
+#include "wimlib/write.h"
+#include "wimlib/xml.h"
 
 #include <errno.h>
 #include <ftw.h>
@@ -68,7 +82,7 @@
 struct wimfs_fd {
 	struct wim_inode *f_inode;
 	struct wim_lookup_table_entry *f_lte;
-	int staging_fd;
+	struct filedes staging_fd;
 	u16 idx;
 	u32 stream_id;
 };
@@ -98,18 +112,19 @@ struct wimfs_context {
 	 * filesystem anyway. */
 	u64 next_ino;
 
-	/* List of lookup table entries for files in the staging directory */
-	struct list_head staging_list;
-
 	/* List of inodes in the mounted image */
-	struct hlist_head *image_inode_list;
+	struct list_head *image_inode_list;
+
+	/* Original list of streams in the mounted image, linked by
+	 * mount_orig_stream_list.  */
+	struct list_head orig_stream_list;
 
 	/* Name and message queue descriptors for message queues between the
 	 * filesystem daemon process and the unmount process.  These are used
 	 * when the filesystem is unmounted and the process running
-	 * wimlib_unmount_image() (i.e. the `imagex unmount' command) needs to
-	 * communicate with the filesystem daemon running fuse_main() (i.e. the
-	 * daemon created by the `imagex mount' or `imagex mountrw' commands */
+	 * wimlib_unmount_image() needs to communicate with the filesystem
+	 * daemon running fuse_main() (i.e. the process created by a call to
+	 * wimlib_mount_image().  */
 	char *unmount_to_daemon_mq_name;
 	char *daemon_to_unmount_mq_name;
 	mqd_t unmount_to_daemon_mq;
@@ -128,29 +143,22 @@ init_wimfs_context(struct wimfs_context *ctx)
 	memset(ctx, 0, sizeof(*ctx));
 	ctx->unmount_to_daemon_mq = (mqd_t)-1;
 	ctx->daemon_to_unmount_mq = (mqd_t)-1;
-	INIT_LIST_HEAD(&ctx->staging_list);
 }
 
 #define WIMFS_CTX(fuse_ctx) ((struct wimfs_context*)(fuse_ctx)->private_data)
 
 static inline struct wimfs_context *
-wimfs_get_context()
+wimfs_get_context(void)
 {
 	return WIMFS_CTX(fuse_get_context());
 }
 
 static inline WIMStruct *
-wimfs_get_WIMStruct()
+wimfs_get_WIMStruct(void)
 {
 	return wimfs_get_context()->wim;
 }
 
-static inline bool
-wimfs_ctx_readonly(const struct wimfs_context *ctx)
-{
-	return (ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) == 0;
-}
-
 static inline int
 get_lookup_flags(const struct wimfs_context *ctx)
 {
@@ -161,7 +169,8 @@ get_lookup_flags(const struct wimfs_context *ctx)
 static inline int
 flags_writable(int open_flags)
 {
-	return open_flags & (O_RDWR | O_WRONLY);
+	int accmode = (open_flags & O_ACCMODE);
+	return (accmode == O_RDWR || accmode == O_WRONLY);
 }
 
 /*
@@ -171,22 +180,17 @@ flags_writable(int open_flags)
  * @stream_id:	ID of the stream we're opening
  * @lte:	Lookup table entry for the stream (may be NULL)
  * @fd_ret:	Return the allocated file descriptor if successful.
- * @readonly:	True if this is a read-only mount.
  *
- * Return 0 iff successful or error code if unsuccessful.
+ * Return 0 iff successful or negative error code if unsuccessful.
  */
 static int
 alloc_wimfs_fd(struct wim_inode *inode,
 	       u32 stream_id,
 	       struct wim_lookup_table_entry *lte,
-	       struct wimfs_fd **fd_ret,
-	       bool readonly)
+	       struct wimfs_fd **fd_ret)
 {
 	static const u16 fds_per_alloc = 8;
 	static const u16 max_fds = 0xffff;
-	int ret;
-
-	pthread_mutex_lock(&inode->i_mutex);
 
 	DEBUG("Allocating fd for stream ID %u from inode %#"PRIx64" "
 	      "(open = %u, allocated = %u)",
@@ -197,20 +201,18 @@ alloc_wimfs_fd(struct wim_inode *inode,
 		struct wimfs_fd **fds;
 		u16 num_new_fds;
 
-		if (inode->i_num_allocated_fds == max_fds) {
-			ret = -EMFILE;
-			goto out;
-		}
+		if (inode->i_num_allocated_fds == max_fds)
+			return -EMFILE;
+
 		num_new_fds = min(fds_per_alloc,
 				  max_fds - inode->i_num_allocated_fds);
 
 		fds = REALLOC(inode->i_fds,
 			      (inode->i_num_allocated_fds + num_new_fds) *
 			        sizeof(inode->i_fds[0]));
-		if (!fds) {
-			ret = -ENOMEM;
-			goto out;
-		}
+		if (!fds)
+			return -ENOMEM;
+
 		memset(&fds[inode->i_num_allocated_fds], 0,
 		       num_new_fds * sizeof(fds[0]));
 		inode->i_fds = fds;
@@ -219,37 +221,29 @@ alloc_wimfs_fd(struct wim_inode *inode,
 	for (u16 i = 0; ; i++) {
 		if (!inode->i_fds[i]) {
 			struct wimfs_fd *fd = CALLOC(1, sizeof(*fd));
-			if (!fd) {
-				ret = -ENOMEM;
-				break;
-			}
-			fd->f_inode    = inode;
-			fd->f_lte      = lte;
-			fd->staging_fd = -1;
-			fd->idx        = i;
-			fd->stream_id  = stream_id;
-			*fd_ret        = fd;
-			inode->i_fds[i]  = fd;
+			if (!fd)
+				return -ENOMEM;
+
+			fd->f_inode     = inode;
+			fd->f_lte       = lte;
+			filedes_invalidate(&fd->staging_fd);
+			fd->idx         = i;
+			fd->stream_id   = stream_id;
+			*fd_ret         = fd;
+			inode->i_fds[i] = fd;
 			inode->i_num_opened_fds++;
-			if (lte && !readonly)
+			if (lte)
 				lte->num_opened_fds++;
 			DEBUG("Allocated fd (idx = %u)", fd->idx);
-			ret = 0;
-			break;
+			return 0;
 		}
 	}
-out:
-	pthread_mutex_unlock(&inode->i_mutex);
-	return ret;
 }
 
 static void
 inode_put_fd(struct wim_inode *inode, struct wimfs_fd *fd)
 {
 	wimlib_assert(inode != NULL);
-
-	pthread_mutex_lock(&inode->i_mutex);
-
 	wimlib_assert(fd->f_inode == inode);
 	wimlib_assert(inode->i_num_opened_fds != 0);
 	wimlib_assert(fd->idx < inode->i_num_allocated_fds);
@@ -257,11 +251,12 @@ inode_put_fd(struct wim_inode *inode, struct wimfs_fd *fd)
 
 	inode->i_fds[fd->idx] = NULL;
 	FREE(fd);
-	if (--inode->i_num_opened_fds == 0 && inode->i_nlink == 0) {
-		pthread_mutex_unlock(&inode->i_mutex);
-		free_inode(inode);
-	} else {
-		pthread_mutex_unlock(&inode->i_mutex);
+	if (--inode->i_num_opened_fds == 0) {
+		FREE(inode->i_fds);
+		inode->i_fds = NULL;
+		inode->i_num_allocated_fds = 0;
+		if (inode->i_nlink == 0)
+			free_inode(inode);
 	}
 }
 
@@ -276,9 +271,9 @@ lte_put_fd(struct wim_lookup_table_entry *lte, struct wimfs_fd *fd)
 	/* Close staging file descriptor if needed. */
 
 	if (lte->resource_location == RESOURCE_IN_STAGING_FILE
-	     && fd->staging_fd != -1)
+	     && filedes_valid(&fd->staging_fd))
 	{
-		if (close(fd->staging_fd) != 0) {
+		if (filedes_close(&fd->staging_fd)) {
 			ERROR_WITH_ERRNO("Failed to close staging file");
 			return -errno;
 		}
@@ -296,13 +291,22 @@ close_wimfs_fd(struct wimfs_fd *fd)
 	      fd->f_inode->i_ino, fd->f_inode->i_num_opened_fds,
 	      fd->f_inode->i_num_allocated_fds);
 	ret = lte_put_fd(fd->f_lte, fd);
-	if (ret != 0)
+	if (ret)
 		return ret;
 
 	inode_put_fd(fd->f_inode, fd);
 	return 0;
 }
 
+static mode_t
+fuse_mask_mode(mode_t mode, struct fuse_context *fuse_ctx)
+{
+#if FUSE_MAJOR_VERSION > 2 || (FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 8)
+	mode &= ~fuse_ctx->umask;
+#endif
+	return mode;
+}
+
 /*
  * Add a new dentry with a new inode to a WIM image.
  *
@@ -318,7 +322,7 @@ create_dentry(struct fuse_context *fuse_ctx, const char *path,
 	struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
 	int ret;
 
-	parent = get_parent_dentry(wimfs_ctx->wim, path);
+	parent = get_parent_dentry(wimfs_ctx->wim, path, WIMLIB_CASE_SENSITIVE);
 	if (!parent)
 		return -errno;
 
@@ -326,7 +330,7 @@ create_dentry(struct fuse_context *fuse_ctx, const char *path,
 		return -ENOTDIR;
 
 	basename = path_basename(path);
-	if (get_dentry_child_with_name(parent, basename))
+	if (get_dentry_child_with_name(parent, basename, WIMLIB_CASE_SENSITIVE))
 		return -EEXIST;
 
 	ret = new_dentry_with_inode(basename, &new);
@@ -338,62 +342,61 @@ create_dentry(struct fuse_context *fuse_ctx, const char *path,
 	new->d_inode->i_attributes = attributes;
 
 	if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
-		if (inode_set_unix_data(new->d_inode,
-					fuse_ctx->uid,
-					fuse_ctx->gid,
-					mode & ~fuse_ctx->umask,
-					wimfs_ctx->wim->lookup_table,
-					UNIX_DATA_ALL | UNIX_DATA_CREATE))
-		{
-			free_dentry(new);
-			return -ENOMEM;
-		}
+		new->d_inode->i_unix_data.uid = fuse_ctx->uid;
+		new->d_inode->i_unix_data.gid = fuse_ctx->gid;
+		new->d_inode->i_unix_data.mode = fuse_mask_mode(mode, fuse_ctx);
 	}
 	dentry_add_child(parent, new);
-	hlist_add_head(&new->d_inode->i_hlist, wimfs_ctx->image_inode_list);
+	list_add_tail(&new->d_inode->i_list, wimfs_ctx->image_inode_list);
 	if (dentry_ret)
 		*dentry_ret = new;
 	return 0;
 }
 
-/* Remove a dentry from a mounted WIM image; i.e. remove an alias for the
- * corresponding inode.
- *
- * If there are no remaining references to the inode either through dentries or
- * open file descriptors, the inode is freed.  Otherwise, the inode is not
- * removed, but the dentry is unlinked and freed.
- *
- * Either way, all lookup table entries referenced by the inode have their
- * reference count decremented.  If a lookup table entry has no open file
- * descriptors and no references remaining, it is freed, and the corresponding
- * staging file is unlinked.
+static struct wim_inode *
+wim_pathname_to_inode(WIMStruct *wim, const tchar *path)
+{
+	struct wim_dentry *dentry;
+	dentry = get_dentry(wim, path, WIMLIB_CASE_SENSITIVE);
+	if (dentry)
+		return dentry->d_inode;
+	else
+		return NULL;
+}
+
+/*
+ * Remove a dentry from a mounted WIM image; i.e. remove an alias for an inode.
  */
 static void
 remove_dentry(struct wim_dentry *dentry,
 	      struct wim_lookup_table *lookup_table)
 {
-	struct wim_inode *inode = dentry->d_inode;
-	struct wim_lookup_table_entry *lte;
-	unsigned i;
+	/* Put a reference to each stream the inode contains.  */
+	inode_unref_streams(dentry->d_inode, lookup_table);
 
-	for (i = 0; i <= inode->i_num_ads; i++) {
-		lte = inode_stream_lte_resolved(inode, i);
-		if (lte)
-			lte_decrement_refcnt(lte, lookup_table);
-	}
+	/* Unlink the dentry from the image's dentry tree.  */
 	unlink_dentry(dentry);
-	put_dentry(dentry);
+
+	/* Delete the dentry.  This will also decrement the link count of the
+	 * corresponding inode.  */
+	free_dentry(dentry);
 }
 
 static mode_t
-inode_default_unix_mode(const struct wim_inode *inode)
+inode_unix_file_type(const struct wim_inode *inode)
 {
 	if (inode_is_symlink(inode))
-		return S_IFLNK | 0777;
+		return S_IFLNK;
 	else if (inode_is_directory(inode))
-		return S_IFDIR | 0777;
+		return S_IFDIR;
 	else
-		return S_IFREG | 0777;
+		return S_IFREG;
+}
+
+static mode_t
+inode_default_unix_mode(const struct wim_inode *inode)
+{
+	return inode_unix_file_type(inode) | 0777;
 }
 
 /* Transfers file attributes from a struct wim_inode to a `stat' buffer.
@@ -409,21 +412,21 @@ inode_to_stbuf(const struct wim_inode *inode,
 	const struct wimfs_context *ctx = wimfs_get_context();
 
 	memset(stbuf, 0, sizeof(struct stat));
-	stbuf->st_mode = inode_default_unix_mode(inode);
-	stbuf->st_uid = ctx->default_uid;
-	stbuf->st_gid = ctx->default_gid;
-	if (ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
-		struct wimlib_unix_data unix_data;
-		if (inode_get_unix_data(inode, &unix_data, NULL) == 0) {
-			stbuf->st_uid = unix_data.uid;
-			stbuf->st_gid = unix_data.gid;
-			stbuf->st_mode = unix_data.mode;
-		}
+	if ((ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) &&
+	    inode_has_unix_data(inode))
+	{
+		stbuf->st_uid = inode->i_unix_data.uid;
+		stbuf->st_gid = inode->i_unix_data.gid;
+		stbuf->st_mode = inode->i_unix_data.mode;
+	} else {
+		stbuf->st_uid = ctx->default_uid;
+		stbuf->st_gid = ctx->default_gid;
+		stbuf->st_mode = inode_default_unix_mode(inode);
 	}
 	stbuf->st_ino = (ino_t)inode->i_ino;
 	stbuf->st_nlink = inode->i_nlink;
 	if (lte)
-		stbuf->st_size = wim_resource_size(lte);
+		stbuf->st_size = lte->size;
 	else
 		stbuf->st_size = 0;
 #ifdef HAVE_STAT_NANOSECOND_PRECISION
@@ -471,7 +474,7 @@ create_staging_file(char **name_ret, struct wimfs_context *ctx)
 	static const size_t STAGING_FILE_NAME_LEN = 20;
 
 	name_len = ctx->staging_dir_name_len + 1 + STAGING_FILE_NAME_LEN;
- 	name = MALLOC(name_len + 1);
+	name = MALLOC(name_len + 1);
 	if (!name) {
 		errno = ENOMEM;
 		return -1;
@@ -555,8 +558,10 @@ extract_resource_to_staging_dir(struct wim_inode *inode,
 
 	/* Extract the stream to the staging file (possibly truncated) */
 	if (old_lte) {
-		extract_size = min(wim_resource_size(old_lte), size);
-		ret = extract_wim_resource_to_fd(old_lte, fd, extract_size);
+		struct filedes wimlib_fd;
+		filedes_init(&wimlib_fd, fd);
+		extract_size = min(old_lte->size, size);
+		ret = extract_stream_to_fd(old_lte, &wimlib_fd, extract_size);
 	} else {
 		ret = 0;
 		extract_size = 0;
@@ -625,15 +630,18 @@ extract_resource_to_staging_dir(struct wim_inode *inode,
 			struct wimfs_fd *fd = inode->i_fds[i];
 			if (fd) {
 				if (fd->stream_id == stream_id) {
+					int raw_fd;
+
 					wimlib_assert(fd->f_lte == old_lte);
-					wimlib_assert(fd->staging_fd == -1);
+					wimlib_assert(!filedes_valid(&fd->staging_fd));
 					fd->f_lte = new_lte;
 					new_lte->num_opened_fds++;
-					fd->staging_fd = open(staging_file_name, O_RDONLY);
-					if (fd->staging_fd == -1) {
+					raw_fd = open(staging_file_name, O_RDONLY);
+					if (raw_fd < 0) {
 						ret = -errno;
 						goto out_revert_fd_changes;
 					}
+					filedes_init(&fd->staging_fd, raw_fd);
 				}
 				j++;
 			}
@@ -646,20 +654,15 @@ extract_resource_to_staging_dir(struct wim_inode *inode,
 		}
 	}
 
-	new_lte->refcnt            = inode->i_nlink;
-	new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
-	new_lte->staging_file_name = staging_file_name;
-	new_lte->lte_inode         = inode;
-
-	if (stream_id == 0)
-		inode->i_lte = new_lte;
-	else
-		for (u16 i = 0; i < inode->i_num_ads; i++)
-			if (inode->i_ads_entries[i].stream_id == stream_id)
-				inode->i_ads_entries[i].lte = new_lte;
+	lte_put_resource(new_lte);
+	new_lte->refcnt              = inode->i_nlink;
+	new_lte->resource_location   = RESOURCE_IN_STAGING_FILE;
+	new_lte->staging_file_name   = staging_file_name;
+	new_lte->size                = size;
 
-	lookup_table_insert_unhashed(ctx->wim->lookup_table, new_lte);
-	list_add_tail(&new_lte->staging_list, &ctx->staging_list);
+	add_unhashed_stream(new_lte, inode, stream_id,
+			    &wim_get_current_image_metadata(ctx->wim)->unhashed_streams);
+	*retrieve_lte_pointer(new_lte) = new_lte;
 	*lte = new_lte;
 	return 0;
 out_revert_fd_changes:
@@ -667,9 +670,9 @@ out_revert_fd_changes:
 		struct wimfs_fd *fd = inode->i_fds[i];
 		if (fd && fd->stream_id == stream_id && fd->f_lte == new_lte) {
 			fd->f_lte = old_lte;
-			if (fd->staging_fd != -1) {
-				close(fd->staging_fd);
-				fd->staging_fd = -1;
+			if (filedes_valid(&fd->staging_fd)) {
+				filedes_close(&fd->staging_fd);
+				filedes_invalidate(&fd->staging_fd);
 			}
 			j++;
 		}
@@ -777,34 +780,6 @@ delete_staging_dir(struct wimfs_context *ctx)
 	return ret;
 }
 
-static void
-inode_update_lte_ptr(struct wim_inode *inode,
-		     struct wim_lookup_table_entry *old_lte,
-		     struct wim_lookup_table_entry *new_lte)
-{
-	if (inode->i_lte == old_lte) {
-		inode->i_lte = new_lte;
-	} else {
-		for (unsigned i = 0; i < inode->i_num_ads; i++) {
-			if (inode->i_ads_entries[i].lte == old_lte) {
-				inode->i_ads_entries[i].lte = new_lte;
-				break;
-			}
-		}
-	}
-}
-
-static void
-free_lte_if_unneeded(struct wim_lookup_table_entry *lte)
-{
-
-	if (wim_resource_size(lte) == 0) {
-		/* Zero-length stream.  No lookup table entry needed. */
-		inode_update_lte_ptr(lte->lte_inode, lte, NULL);
-		free_lookup_table_entry(lte);
-	}
-}
-
 static int
 inode_close_fds(struct wim_inode *inode)
 {
@@ -824,29 +799,35 @@ inode_close_fds(struct wim_inode *inode)
 
 /* Overwrites the WIM file, with changes saved. */
 static int
-rebuild_wim(struct wimfs_context *ctx, int write_flags,
-	    wimlib_progress_func_t progress_func)
+rebuild_wim(struct wimfs_context *ctx, int write_flags)
 {
 	int ret;
 	struct wim_lookup_table_entry *lte, *tmp;
-	WIMStruct *w = ctx->wim;
+	WIMStruct *wim = ctx->wim;
+	struct wim_image_metadata *imd = wim_get_current_image_metadata(ctx->wim);
 
 	DEBUG("Closing all staging file descriptors.");
-	list_for_each_entry_safe(lte, tmp, &ctx->staging_list, staging_list) {
-		ret = inode_close_fds(lte->lte_inode);
-		if (ret != 0)
+	image_for_each_unhashed_stream_safe(lte, tmp, imd) {
+		ret = inode_close_fds(lte->back_inode);
+		if (ret)
 			return ret;
 	}
 
 	DEBUG("Freeing entries for zero-length streams");
-	list_for_each_entry_safe(lte, tmp, &ctx->staging_list, staging_list)
-		free_lte_if_unneeded(lte);
+	image_for_each_unhashed_stream_safe(lte, tmp, imd) {
+		wimlib_assert(lte->unhashed);
+		if (lte->size == 0) {
+			struct wim_lookup_table_entry **back_ptr;
+			back_ptr = retrieve_lte_pointer(lte);
+			*back_ptr = NULL;
+			list_del(&lte->unhashed_list);
+			free_lookup_table_entry(lte);
+		}
+	}
 
-	xml_update_image_info(w, w->current_image);
-	list_splice(&ctx->staging_list,
-		    &w->image_metadata[w->current_image - 1].unhashed_streams);
-	ret = wimlib_overwrite(w, write_flags, 0, progress_func);
-	if (ret != 0)
+	xml_update_image_info(wim, wim->current_image);
+	ret = wimlib_overwrite(wim, write_flags, 0);
+	if (ret)
 		ERROR("Failed to commit changes to mounted WIM image");
 	return ret;
 }
@@ -874,7 +855,7 @@ set_message_queue_names(struct wimfs_context *ctx, const char *mount_dir)
 	char *p;
 	int ret;
 
- 	dir_path = realpath(mount_dir, NULL);
+	dir_path = realpath(mount_dir, NULL);
 	if (!dir_path) {
 		ERROR_WITH_ERRNO("Failed to resolve path \"%s\"", mount_dir);
 		if (errno == ENOMEM)
@@ -1056,29 +1037,29 @@ struct unmount_msg_hdr {
 	u32 cur_version;
 	u32 msg_type;
 	u32 msg_size;
-} PACKED;
+} _packed_attribute;
 
 struct msg_unmount_request {
 	struct unmount_msg_hdr hdr;
 	u32 unmount_flags;
 	u8 want_progress_messages;
-} PACKED;
+} _packed_attribute;
 
 struct msg_daemon_info {
 	struct unmount_msg_hdr hdr;
 	pid_t daemon_pid;
 	u32 mount_flags;
-} PACKED;
+} _packed_attribute;
 
 struct msg_unmount_finished {
 	struct unmount_msg_hdr hdr;
-	int32_t status;
-} PACKED;
+	s32 status;
+} _packed_attribute;
 
 struct msg_write_streams_progress {
 	struct unmount_msg_hdr hdr;
 	union wimlib_progress_info info;
-} PACKED;
+} _packed_attribute;
 
 enum {
 	MSG_TYPE_UNMOUNT_REQUEST,
@@ -1097,7 +1078,8 @@ struct unmount_msg_handler_context {
 	pid_t daemon_pid;
 	int mount_flags;
 	int status;
-	wimlib_progress_func_t progress_func;
+	wimlib_progress_func_t progfunc;
+	void *progctx;
 };
 
 struct daemon_msg_handler_context {
@@ -1111,7 +1093,9 @@ send_unmount_request_msg(mqd_t mq, int unmount_flags, u8 want_progress_messages)
 	DEBUG("Sending unmount request msg");
 	struct msg_unmount_request msg = {
 		.hdr = {
-			.min_version = WIMLIB_MAKEVERSION(1, 2, 1),
+			.min_version = ((unmount_flags & WIMLIB_UNMOUNT_FLAG_NEW_IMAGE) ?
+						WIMLIB_MAKEVERSION(1, 6, 2) :
+						WIMLIB_MAKEVERSION(1, 2, 1)),
 			.cur_version = WIMLIB_VERSION_CODE,
 			.msg_type    = MSG_TYPE_UNMOUNT_REQUEST,
 			.msg_size    = sizeof(msg),
@@ -1167,9 +1151,9 @@ send_unmount_finished_msg(mqd_t mq, int status)
 		ERROR_WITH_ERRNO("Failed to send status to unmount process");
 }
 
-static int
+static enum wimlib_progress_status
 unmount_progress_func(enum wimlib_progress_msg msg,
-		      const union wimlib_progress_info *info)
+		      union wimlib_progress_info *info, void *_ignored_context)
 {
 	if (msg == WIMLIB_PROGRESS_MSG_WRITE_STREAMS) {
 		struct msg_write_streams_progress msg = {
@@ -1188,7 +1172,81 @@ unmount_progress_func(enum wimlib_progress_msg msg,
 					 "to unmount process");
 		}
 	}
+	return WIMLIB_PROGRESS_STATUS_CONTINUE;
+}
+
+static void
+release_extra_refcnts(struct wimfs_context *ctx)
+{
+	struct list_head *list = &ctx->orig_stream_list;
+	struct wim_lookup_table *lookup_table = ctx->wim->lookup_table;
+	struct wim_lookup_table_entry *lte, *tmp;
+
+	list_for_each_entry_safe(lte, tmp, list, orig_stream_list) {
+		u32 n = lte->out_refcnt;
+		while (n--)
+			lte_decrement_refcnt(lte, lookup_table);
+	}
+}
+
+/* Moves the currently selected image, which may have been modified, to a new
+ * index, and sets the original index to refer to a reset (unmodified) copy of
+ * the image.  */
+static int
+renew_current_image(struct wimfs_context *ctx)
+{
+	WIMStruct *wim = ctx->wim;
+	int ret;
+	int idx = wim->current_image - 1;
+	struct wim_image_metadata *imd = wim->image_metadata[idx];
+	struct wim_image_metadata *replace_imd;
+	struct wim_lookup_table_entry *new_lte;
+
+	if (imd->metadata_lte->resource_location != RESOURCE_IN_WIM) {
+		ERROR("Can't reset modified image that doesn't yet "
+		      "exist in the on-disk WIM file!");
+		return WIMLIB_ERR_METADATA_NOT_FOUND;
+	}
+
+	/* Create 'replace_imd' structure to use for the reset original,
+	 * unmodified image.  */
+	replace_imd = new_image_metadata();
+	if (!replace_imd)
+		return WIMLIB_ERR_NOMEM;
+
+	/* Create new stream reference for the modified image's metadata
+	 * resource, which doesn't exist yet.  */
+	ret = WIMLIB_ERR_NOMEM;
+	new_lte = new_lookup_table_entry();
+	if (!new_lte)
+		goto err_put_replace_imd;
+	new_lte->flags = WIM_RESHDR_FLAG_METADATA;
+	new_lte->unhashed = 1;
+
+	/* Make the image being moved available at a new index.  Increments the
+	 * WIM's image count, but does not increment the reference count of the
+	 * 'struct image_metadata'.  */
+	ret = append_image_metadata(wim, imd);
+	if (ret)
+		goto err_free_new_lte;
+
+	ret = xml_add_image(wim, T(""));
+	if (ret)
+		goto err_undo_append;
+
+	replace_imd->metadata_lte = imd->metadata_lte;
+	imd->metadata_lte = new_lte;
+	wim->image_metadata[idx] = replace_imd;
+	wim->current_image = wim->hdr.image_count;
 	return 0;
+
+err_undo_append:
+	wim->hdr.image_count--;
+err_free_new_lte:
+	free_lookup_table_entry(new_lte);
+err_put_replace_imd:
+	put_image_metadata(replace_imd, NULL);
+	return ret;
 }
 
 static int
@@ -1200,7 +1258,6 @@ msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
 	int status = 0;
 	int ret;
 	int unmount_flags;
-	wimlib_progress_func_t progress_func;
 
 	DEBUG("Handling unmount request msg");
 
@@ -1211,10 +1268,11 @@ msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
 	}
 
 	unmount_flags = msg->unmount_flags;
-	if (msg->want_progress_messages)
-		progress_func = unmount_progress_func;
-	else
-		progress_func = NULL;
+
+	wimlib_register_progress_function(wimfs_ctx->wim,
+					  (msg->want_progress_messages ?
+					   unmount_progress_func : NULL),
+					  NULL);
 
 	ret = send_daemon_info_msg(wimfs_ctx->daemon_to_unmount_mq, getpid(),
 				   wimfs_ctx->mount_flags);
@@ -1225,6 +1283,18 @@ msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
 
 	if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
 		if (unmount_flags & WIMLIB_UNMOUNT_FLAG_COMMIT) {
+
+			if (unmount_flags & WIMLIB_UNMOUNT_FLAG_NEW_IMAGE) {
+				ret = renew_current_image(wimfs_ctx);
+				if (ret) {
+					status = ret;
+					goto out;
+				}
+			} else {
+				release_extra_refcnts(wimfs_ctx);
+			}
+			INIT_LIST_HEAD(&wimfs_ctx->orig_stream_list);
+
 			int write_flags = 0;
 			if (unmount_flags & WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY)
 				write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
@@ -1232,8 +1302,7 @@ msg_unmount_request_handler(const void *_msg, void *_handler_ctx)
 				write_flags |= WIMLIB_WRITE_FLAG_REBUILD;
 			if (unmount_flags & WIMLIB_UNMOUNT_FLAG_RECOMPRESS)
 				write_flags |= WIMLIB_WRITE_FLAG_RECOMPRESS;
-			status = rebuild_wim(wimfs_ctx, write_flags,
-					     progress_func);
+			status = rebuild_wim(wimfs_ctx, write_flags);
 		}
 	} else {
 		DEBUG("Read-only mount");
@@ -1280,11 +1349,10 @@ msg_write_streams_progress_handler(const void *_msg, void *_handler_ctx)
 
 	if (msg->hdr.msg_size < sizeof(*msg))
 		return WIMLIB_ERR_INVALID_UNMOUNT_MESSAGE;
-	if (handler_ctx->progress_func) {
-		handler_ctx->progress_func(WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
-					   &msg->info);
-	}
-	return 0;
+	return call_progress(handler_ctx->progfunc,
+			     WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
+			     (union wimlib_progress_info *)&msg->info,
+			     handler_ctx->progctx);
 }
 
 static int
@@ -1304,25 +1372,19 @@ msg_unmount_finished_handler(const void *_msg, void *_handler_ctx)
 static int
 unmount_timed_out_cb(void *_handler_ctx)
 {
-	struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
+	const struct unmount_msg_handler_context *handler_ctx = _handler_ctx;
 
-	if (handler_ctx->daemon_pid == 0) {
-		goto out_crashed;
-	} else {
-		kill(handler_ctx->daemon_pid, 0);
-		if (errno == ESRCH) {
-			goto out_crashed;
-		} else {
-			DEBUG("Filesystem daemon is still alive... "
-			      "Waiting another %d seconds\n",
-			      handler_ctx->hdr.timeout_seconds);
-			return 0;
-		}
+	if (handler_ctx->daemon_pid == 0 ||
+	    (kill(handler_ctx->daemon_pid, 0) != 0 && errno == ESRCH))
+	{
+		ERROR("The filesystem daemon has crashed!  Changes to the "
+		      "WIM may not have been commited.");
+		return WIMLIB_ERR_FILESYSTEM_DAEMON_CRASHED;
 	}
-out_crashed:
-	ERROR("The filesystem daemon has crashed!  Changes to the "
-	      "WIM may not have been commited.");
-	return WIMLIB_ERR_FILESYSTEM_DAEMON_CRASHED;
+
+	DEBUG("Filesystem daemon is still alive... "
+	      "Waiting another %d seconds", handler_ctx->hdr.timeout_seconds);
+	return 0;
 }
 
 static int
@@ -1454,7 +1516,7 @@ message_loop(mqd_t mq,
  *  daemon to finish writing the WIM file.
  */
 static int
-execute_fusermount(const char *dir)
+execute_fusermount(const char *dir, bool lazy)
 {
 	pid_t pid;
 	int ret;
@@ -1467,7 +1529,15 @@ execute_fusermount(const char *dir)
 	}
 	if (pid == 0) {
 		/* Child */
-		execlp("fusermount", "fusermount", "-u", dir, NULL);
+		char *argv[10];
+		char **argp = argv;
+		*argp++ = "fusermount";
+		if (lazy)
+			*argp++ = "-z";
+		*argp++ = "-u";
+		*argp++ = (char*)dir;
+		*argp = NULL;
+		execvp("fusermount", argv);
 		ERROR_WITH_ERRNO("Failed to execute `fusermount'");
 		exit(WIMLIB_ERR_FUSERMOUNT);
 	}
@@ -1505,7 +1575,14 @@ execute_fusermount(const char *dir)
 	}
 	if (pid == 0) {
 		/* Child */
-		execlp("umount", "umount", dir, NULL);
+		char *argv[10];
+		char **argp = argv;
+		*argp++ = "umount";
+		if (lazy)
+			*argp++ = "-l";
+		*argp++ = (char*)dir;
+		*argp = NULL;
+		execvp("umount", argv);
 		ERROR_WITH_ERRNO("Failed to execute `umount'");
 		exit(WIMLIB_ERR_FUSERMOUNT);
 	}
@@ -1517,61 +1594,64 @@ execute_fusermount(const char *dir)
 				 "terminate");
 		return WIMLIB_ERR_FUSERMOUNT;
 	}
-	if (status != 0) {
+
+	if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
 		ERROR("`umount' did not successfully complete");
 		return WIMLIB_ERR_FUSERMOUNT;
 	}
+
 	return 0;
 }
 
-#if 0
-static int wimfs_access(const char *path, int mask)
-{
-	return -ENOSYS;
-}
-#endif
-
 static int
 wimfs_chmod(const char *path, mode_t mask)
 {
 	struct wim_dentry *dentry;
+	struct wim_inode *inode;
 	struct wimfs_context *ctx = wimfs_get_context();
 	int ret;
 
 	if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
 		return -EPERM;
 
-	ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
-			      &dentry, NULL, NULL);
+	ret = wim_pathname_to_stream(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
+				     &dentry, NULL, NULL);
 	if (ret)
 		return ret;
 
-	ret = inode_set_unix_data(dentry->d_inode, ctx->default_uid,
-				  ctx->default_gid, mask,
-				  ctx->wim->lookup_table, UNIX_DATA_MODE);
-	return ret ? -ENOMEM : 0;
+	inode = dentry->d_inode;
+
+	if (!inode_has_unix_data(inode)) {
+		inode->i_unix_data.uid = ctx->default_uid;
+		inode->i_unix_data.gid = ctx->default_gid;
+	}
+	inode->i_unix_data.mode = mask;
+	return 0;
 }
 
 static int
 wimfs_chown(const char *path, uid_t uid, gid_t gid)
 {
 	struct wim_dentry *dentry;
+	struct wim_inode *inode;
 	struct wimfs_context *ctx = wimfs_get_context();
 	int ret;
 
 	if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
 		return -EPERM;
 
-	ret = lookup_resource(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
-			      &dentry, NULL, NULL);
+	ret = wim_pathname_to_stream(ctx->wim, path, LOOKUP_FLAG_DIRECTORY_OK,
+				     &dentry, NULL, NULL);
 	if (ret)
 		return ret;
 
-	ret = inode_set_unix_data(dentry->d_inode, uid, gid,
-				  inode_default_unix_mode(dentry->d_inode),
-				  ctx->wim->lookup_table,
-				  UNIX_DATA_UID | UNIX_DATA_GID);
-	return ret ? -ENOMEM : 0;
+	inode = dentry->d_inode;
+
+	if (!inode_has_unix_data(inode))
+		inode->i_unix_data.mode = inode_default_unix_mode(inode);
+	inode->i_unix_data.uid = uid;
+	inode->i_unix_data.gid = gid;
+	return 0;
 }
 
 /* Called when the filesystem is unmounted. */
@@ -1592,17 +1672,6 @@ wimfs_destroy(void *p)
 	}
 }
 
-#if 0
-static int wimfs_fallocate(const char *path, int mode,
-			   off_t offset, off_t len, struct fuse_file_info *fi)
-{
-	struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
-	wimlib_assert(fd->staging_fd != -1);
-	return fallocate(fd->staging_fd, mode, offset, len);
-}
-
-#endif
-
 static int
 wimfs_fgetattr(const char *path, struct stat *stbuf,
 	       struct fuse_file_info *fi)
@@ -1615,11 +1684,11 @@ static int
 wimfs_ftruncate(const char *path, off_t size, struct fuse_file_info *fi)
 {
 	struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
-	int ret = ftruncate(fd->staging_fd, size);
+	int ret = ftruncate(fd->staging_fd.fd, size);
 	if (ret)
 		return -errno;
 	touch_inode(fd->f_inode);
-	fd->f_lte->resource_entry.original_size = size;
+	fd->f_lte->size = size;
 	return 0;
 }
 
@@ -1634,9 +1703,10 @@ wimfs_getattr(const char *path, struct stat *stbuf)
 	int ret;
 	struct wimfs_context *ctx = wimfs_get_context();
 
-	ret = lookup_resource(ctx->wim, path,
-			      get_lookup_flags(ctx) | LOOKUP_FLAG_DIRECTORY_OK,
-			      &dentry, &lte, NULL);
+	ret = wim_pathname_to_stream(ctx->wim, path,
+				     get_lookup_flags(ctx) |
+					LOOKUP_FLAG_DIRECTORY_OK,
+				     &dentry, &lte, NULL);
 	if (ret != 0)
 		return ret;
 	return inode_to_stbuf(dentry->d_inode, lte, stbuf);
@@ -1651,14 +1721,14 @@ wimfs_getxattr(const char *path, const char *name, char *value,
 	int ret;
 	struct wim_inode *inode;
 	struct wim_ads_entry *ads_entry;
-	size_t res_size;
+	u64 stream_size;
 	struct wim_lookup_table_entry *lte;
 	struct wimfs_context *ctx = wimfs_get_context();
 
 	if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
 		return -ENOTSUP;
 
-	if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
+	if (strlen(name) <= 5 || memcmp(name, "user.", 5) != 0)
 		return -ENOATTR;
 	name += 5;
 
@@ -1671,19 +1741,22 @@ wimfs_getxattr(const char *path, const char *name, char *value,
 		return -ENOATTR;
 
 	lte = ads_entry->lte;
-	res_size = wim_resource_size(lte);
+	stream_size = lte->size;
 
 	if (size == 0)
-		return res_size;
+		return stream_size;
 
-	if (res_size > size)
+	if (stream_size > size)
 		return -ERANGE;
 
-	ret = read_full_resource_into_buf(lte, value, true);
-	if (ret != 0)
-		return -EIO;
-
-	return res_size;
+	ret = read_full_stream_into_buf(lte, value);
+	if (ret) {
+		if (errno)
+			return -errno;
+		else
+			return -EIO;
+	}
+	return stream_size;
 }
 #endif
 
@@ -1694,12 +1767,10 @@ wimfs_link(const char *to, const char *from)
 	struct wim_dentry *from_dentry, *from_dentry_parent;
 	const char *link_name;
 	struct wim_inode *inode;
-	struct wim_lookup_table_entry *lte;
-	WIMStruct *w = wimfs_get_WIMStruct();
-	u16 i;
+	WIMStruct *wim = wimfs_get_WIMStruct();
 	int ret;
 
-	inode = wim_pathname_to_inode(w, to);
+	inode = wim_pathname_to_inode(wim, to);
 	if (!inode)
 		return -errno;
 
@@ -1707,29 +1778,25 @@ wimfs_link(const char *to, const char *from)
 				   FILE_ATTRIBUTE_REPARSE_POINT))
 		return -EPERM;
 
-	from_dentry_parent = get_parent_dentry(w, from);
+	from_dentry_parent = get_parent_dentry(wim, from, WIMLIB_CASE_SENSITIVE);
 	if (!from_dentry_parent)
 		return -errno;
 	if (!dentry_is_directory(from_dentry_parent))
 		return -ENOTDIR;
 
 	link_name = path_basename(from);
-	if (get_dentry_child_with_name(from_dentry_parent, link_name))
+	if (get_dentry_child_with_name(from_dentry_parent, link_name,
+				       WIMLIB_CASE_SENSITIVE))
 		return -EEXIST;
 
 	ret = new_dentry(link_name, &from_dentry);
 	if (ret)
 		return -ENOMEM;
 
-	inode_add_dentry(from_dentry, inode);
-	from_dentry->d_inode = inode;
 	inode->i_nlink++;
-
-	for (i = 0; i <= inode->i_num_ads; i++) {
-		lte = inode_stream_lte_resolved(inode, i);
-		if (lte)
-			lte->refcnt++;
-	}
+	inode_ref_streams(inode);
+	from_dentry->d_inode = inode;
+	inode_add_dentry(from_dentry, inode);
 	dentry_add_child(from_dentry_parent, from_dentry);
 	return 0;
 }
@@ -1756,6 +1823,10 @@ wimfs_listxattr(const char *path, char *list, size_t size)
 
 	p = list;
 	for (i = 0; i < inode->i_num_ads; i++) {
+
+		if (!ads_entry_is_named_stream(&inode->i_ads_entries[i]))
+			continue;
+
 		char *stream_name_mbs;
 		size_t stream_name_mbs_nbytes;
 		int ret;
@@ -1843,18 +1914,22 @@ wimfs_open(const char *path, struct fuse_file_info *fi)
 	u16 stream_idx;
 	u32 stream_id;
 	struct wimfs_context *ctx = wimfs_get_context();
+	struct wim_lookup_table_entry **back_ptr;
 
-	ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
-			      &dentry, &lte, &stream_idx);
-	if (ret != 0)
+	ret = wim_pathname_to_stream(ctx->wim, path, get_lookup_flags(ctx),
+				     &dentry, &lte, &stream_idx);
+	if (ret)
 		return ret;
 
 	inode = dentry->d_inode;
 
-	if (stream_idx == 0)
+	if (stream_idx == 0) {
 		stream_id = 0;
-	else
+		back_ptr = &inode->i_lte;
+	} else {
 		stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
+		back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
+	}
 
 	/* The file resource may be in the staging directory (read-write mounts
 	 * only) or in the WIM.  If it's in the staging directory, we need to
@@ -1865,25 +1940,28 @@ wimfs_open(const char *path, struct fuse_file_info *fi)
 
 	if (flags_writable(fi->flags) &&
             (!lte || lte->resource_location != RESOURCE_IN_STAGING_FILE)) {
-		u64 size = (lte) ? wim_resource_size(lte) : 0;
+		u64 size = (lte) ? lte->size : 0;
 		ret = extract_resource_to_staging_dir(inode, stream_id,
 						      &lte, size, ctx);
-		if (ret != 0)
+		if (ret)
 			return ret;
+		*back_ptr = lte;
 	}
 
-	ret = alloc_wimfs_fd(inode, stream_id, lte, &fd,
-			     wimfs_ctx_readonly(ctx));
-	if (ret != 0)
+	ret = alloc_wimfs_fd(inode, stream_id, lte, &fd);
+	if (ret)
 		return ret;
 
 	if (lte && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
-		fd->staging_fd = open(lte->staging_file_name, fi->flags);
-		if (fd->staging_fd == -1) {
+		int raw_fd;
+
+		raw_fd = open(lte->staging_file_name, fi->flags);
+		if (raw_fd < 0) {
 			int errno_save = errno;
 			close_wimfs_fd(fd);
 			return -errno_save;
 		}
+		filedes_init(&fd->staging_fd, raw_fd);
 	}
 	fi->fh = (uintptr_t)fd;
 	return 0;
@@ -1897,14 +1975,14 @@ wimfs_opendir(const char *path, struct fuse_file_info *fi)
 	int ret;
 	struct wimfs_fd *fd = NULL;
 	struct wimfs_context *ctx = wimfs_get_context();
-	WIMStruct *w = ctx->wim;
+	WIMStruct *wim = ctx->wim;
 
-	inode = wim_pathname_to_inode(w, path);
+	inode = wim_pathname_to_inode(wim, path);
 	if (!inode)
 		return -errno;
 	if (!inode_is_directory(inode))
 		return -ENOTDIR;
-	ret = alloc_wimfs_fd(inode, 0, NULL, &fd, wimfs_ctx_readonly(ctx));
+	ret = alloc_wimfs_fd(inode, 0, NULL, &fd);
 	fi->fh = (uintptr_t)fd;
 	return ret;
 }
@@ -1919,31 +1997,38 @@ wimfs_read(const char *path, char *buf, size_t size,
 {
 	struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
 	ssize_t ret;
-	u64 res_size;
+	u64 stream_size;
 
 	if (!fd)
 		return -EBADF;
 
-	if (!fd->f_lte) /* Empty stream with no lookup table entry */
+	if (size == 0)
 		return 0;
 
-	res_size = wim_resource_size(fd->f_lte);
-	if (offset > res_size)
+	if (fd->f_lte)
+		stream_size = fd->f_lte->size;
+	else
+		stream_size = 0;
+
+	if (offset > stream_size)
 		return -EOVERFLOW;
-	size = min(size, INT_MAX);
-	size = min(size, res_size - offset);
+
+	size = min(size, stream_size - offset);
+	if (size == 0)
+		return 0;
 
 	switch (fd->f_lte->resource_location) {
 	case RESOURCE_IN_STAGING_FILE:
-		ret = pread(fd->staging_fd, buf, size, offset);
-		if (ret < 0)
+		ret = raw_pread(&fd->staging_fd, buf, size, offset);
+		if (ret == -1)
 			ret = -errno;
 		break;
 	case RESOURCE_IN_WIM:
-		if (read_partial_wim_resource_into_buf(fd->f_lte, size,
-						       offset, buf, true))
-			ret = -errno;
-		ret = size;
+		if (read_partial_wim_stream_into_buf(fd->f_lte, size,
+						     offset, buf))
+			ret = errno ? -errno : -EIO;
+		else
+			ret = size;
 		break;
 	case RESOURCE_IN_ATTACHED_BUFFER:
 		memcpy(buf, fd->f_lte->attached_buffer + offset, size);
@@ -1957,32 +2042,6 @@ wimfs_read(const char *path, char *buf, size_t size,
 	return ret;
 }
 
-struct fill_params {
-	void *buf;
-	fuse_fill_dir_t filler;
-};
-
-static int
-dentry_fuse_fill(struct wim_dentry *dentry, void *arg)
-{
-	struct fill_params *fill_params = arg;
-
-	char *file_name_mbs;
-	size_t file_name_mbs_nbytes;
-	int ret;
-
-	ret = utf16le_to_tstr(dentry->file_name,
-			      dentry->file_name_nbytes,
-			      &file_name_mbs,
-			      &file_name_mbs_nbytes);
-	if (ret)
-		return -errno;
-
-	ret = fill_params->filler(fill_params->buf, file_name_mbs, NULL, 0);
-	FREE(file_name_mbs);
-	return ret;
-}
-
 /* Fills in the entries of the directory specified by @path using the
  * FUSE-provided function @filler.  */
 static int
@@ -1991,22 +2050,38 @@ wimfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
 {
 	struct wimfs_fd *fd = (struct wimfs_fd*)(uintptr_t)fi->fh;
 	struct wim_inode *inode;
+	struct wim_dentry *child;
+	int ret;
 
 	if (!fd)
 		return -EBADF;
 
 	inode = fd->f_inode;
 
-	struct fill_params fill_params = {
-		.buf = buf,
-		.filler = filler,
-	};
+	ret = filler(buf, ".", NULL, 0);
+	if (ret)
+		return ret;
+	ret = filler(buf, "..", NULL, 0);
+	if (ret)
+		return ret;
+
+	for_inode_child(child, inode) {
+		char *file_name_mbs;
+		size_t file_name_mbs_nbytes;
 
-	filler(buf, ".", NULL, 0);
-	filler(buf, "..", NULL, 0);
+		ret = utf16le_to_tstr(child->file_name,
+				      child->file_name_nbytes,
+				      &file_name_mbs,
+				      &file_name_mbs_nbytes);
+		if (ret)
+			return -errno;
 
-	return for_dentry_in_rbtree(inode->i_children.rb_node,
-				    dentry_fuse_fill, &fill_params);
+		ret = filler(buf, file_name_mbs, NULL, 0);
+		FREE(file_name_mbs);
+		if (ret)
+			return ret;
+	}
+	return 0;
 }
 
 
@@ -2020,10 +2095,16 @@ wimfs_readlink(const char *path, char *buf, size_t buf_len)
 		return -errno;
 	if (!inode_is_symlink(inode))
 		return -EINVAL;
-
-	ret = inode_readlink(inode, buf, buf_len, ctx->wim, true);
-	if (ret > 0)
+	if (buf_len == 0)
+		return -EINVAL;
+	ret = wim_inode_readlink(inode, buf, buf_len - 1, NULL);
+	if (ret >= 0) {
+		wimlib_assert(ret <= buf_len - 1);
+		buf[ret] = '\0';
 		ret = 0;
+	} else if (ret == -ENAMETOOLONG) {
+		buf[buf_len - 1] = '\0';
+	}
 	return ret;
 }
 
@@ -2076,58 +2157,8 @@ wimfs_removexattr(const char *path, const char *name)
 static int
 wimfs_rename(const char *from, const char *to)
 {
-	struct wim_dentry *src;
-	struct wim_dentry *dst;
-	struct wim_dentry *parent_of_dst;
-	WIMStruct *w = wimfs_get_WIMStruct();
-	int ret;
-
-	/* This rename() implementation currently only supports actual files
-	 * (not alternate data streams) */
-
-	src = get_dentry(w, from);
-	if (!src)
-		return -errno;
-
-	dst = get_dentry(w, to);
-
-	if (dst) {
-		/* Destination file exists */
-
-		if (src == dst) /* Same file */
-			return 0;
-
-		if (!dentry_is_directory(src)) {
-			/* Cannot rename non-directory to directory. */
-			if (dentry_is_directory(dst))
-				return -EISDIR;
-		} else {
-			/* Cannot rename directory to a non-directory or a non-empty
-			 * directory */
-			if (!dentry_is_directory(dst))
-				return -ENOTDIR;
-			if (inode_has_children(dst->d_inode))
-				return -ENOTEMPTY;
-		}
-		parent_of_dst = dst->parent;
-	} else {
-		/* Destination does not exist */
-		parent_of_dst = get_parent_dentry(w, to);
-		if (!parent_of_dst)
-			return -errno;
-
-		if (!dentry_is_directory(parent_of_dst))
-			return -ENOTDIR;
-	}
-
-	ret = set_dentry_name(src, path_basename(to));
-	if (ret != 0)
-		return -ENOMEM;
-	if (dst)
-		remove_dentry(dst, w->lookup_table);
-	unlink_dentry(src);
-	dentry_add_child(parent_of_dst, src);
-	return 0;
+	return rename_wim_path(wimfs_get_WIMStruct(), from, to,
+			       WIMLIB_CASE_SENSITIVE, NULL);
 }
 
 /* Remove a directory */
@@ -2135,9 +2166,9 @@ static int
 wimfs_rmdir(const char *path)
 {
 	struct wim_dentry *dentry;
-	WIMStruct *w = wimfs_get_WIMStruct();
+	WIMStruct *wim = wimfs_get_WIMStruct();
 
-	dentry = get_dentry(w, path);
+	dentry = get_dentry(wim, path, WIMLIB_CASE_SENSITIVE);
 	if (!dentry)
 		return -errno;
 
@@ -2147,7 +2178,7 @@ wimfs_rmdir(const char *path)
 	if (dentry_has_children(dentry))
 		return -ENOTEMPTY;
 
-	remove_dentry(dentry, w->lookup_table);
+	remove_dentry(dentry, wim->lookup_table);
 	return 0;
 }
 
@@ -2166,7 +2197,7 @@ wimfs_setxattr(const char *path, const char *name,
 	if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
 		return -ENOTSUP;
 
-	if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0)
+	if (strlen(name) <= 5 || memcmp(name, "user.", 5) != 0)
 		return -ENOATTR;
 	name += 5;
 
@@ -2207,11 +2238,14 @@ wimfs_symlink(const char *to, const char *from)
 			    FILE_ATTRIBUTE_REPARSE_POINT, &dentry);
 	if (ret == 0) {
 		dentry->d_inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
-		if (inode_set_symlink(dentry->d_inode, to,
-				      wimfs_ctx->wim->lookup_table, NULL))
-		{
+		ret = wim_inode_set_symlink(dentry->d_inode, to,
+					    wimfs_ctx->wim->lookup_table);
+		if (ret) {
 			remove_dentry(dentry, wimfs_ctx->wim->lookup_table);
-			ret = -ENOMEM;
+			if (ret == WIMLIB_ERR_NOMEM)
+				ret = -ENOMEM;
+			else
+				ret = -EIO;
 		}
 	}
 	return ret;
@@ -2230,8 +2264,8 @@ wimfs_truncate(const char *path, off_t size)
 	struct wim_inode *inode;
 	struct wimfs_context *ctx = wimfs_get_context();
 
-	ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
-			      &dentry, &lte, &stream_idx);
+	ret = wim_pathname_to_stream(ctx->wim, path, get_lookup_flags(ctx),
+				     &dentry, &lte, &stream_idx);
 
 	if (ret != 0)
 		return ret;
@@ -2239,24 +2273,29 @@ wimfs_truncate(const char *path, off_t size)
 	if (lte == NULL && size == 0)
 		return 0;
 
-	inode = dentry->d_inode;
-	if (stream_idx == 0)
-		stream_id = 0;
-	else
-		stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
-
-	if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
+	if (lte != NULL && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
 		ret = truncate(lte->staging_file_name, size);
-		if (ret != 0)
+		if (ret)
 			ret = -errno;
+		else
+			lte->size = size;
 	} else {
 		/* File in WIM.  Extract it to the staging directory, but only
 		 * the first @size bytes of it. */
+		struct wim_lookup_table_entry **back_ptr;
+
+		inode = dentry->d_inode;
+		if (stream_idx == 0) {
+			stream_id = 0;
+			back_ptr = &inode->i_lte;
+		} else {
+			stream_id = inode->i_ads_entries[stream_idx - 1].stream_id;
+			back_ptr = &inode->i_ads_entries[stream_idx - 1].lte;
+		}
 		ret = extract_resource_to_staging_dir(inode, stream_id,
 						      &lte, size, ctx);
+		*back_ptr = lte;
 	}
-	if (ret == 0)
-		lte->resource_entry.original_size = size;
 	return ret;
 }
 
@@ -2270,13 +2309,13 @@ wimfs_unlink(const char *path)
 	u16 stream_idx;
 	struct wimfs_context *ctx = wimfs_get_context();
 
-	ret = lookup_resource(ctx->wim, path, get_lookup_flags(ctx),
-			      &dentry, &lte, &stream_idx);
+	ret = wim_pathname_to_stream(ctx->wim, path, get_lookup_flags(ctx),
+				     &dentry, &lte, &stream_idx);
 
 	if (ret != 0)
 		return ret;
 
-	if (stream_idx == 0)
+	if (inode_stream_name_nbytes(dentry->d_inode, stream_idx) == 0)
 		remove_dentry(dentry, ctx->wim->lookup_table);
 	else
 		inode_remove_ads(dentry->d_inode, stream_idx - 1,
@@ -2293,14 +2332,12 @@ wimfs_unlink(const char *path)
 static int
 wimfs_utimens(const char *path, const struct timespec tv[2])
 {
-	struct wim_dentry *dentry;
 	struct wim_inode *inode;
-	WIMStruct *w = wimfs_get_WIMStruct();
+	WIMStruct *wim = wimfs_get_WIMStruct();
 
- 	dentry = get_dentry(w, path);
-	if (!dentry)
+	inode = wim_pathname_to_inode(wim, path);
+	if (!inode)
 		return -errno;
-	inode = dentry->d_inode;
 
 	if (tv[0].tv_nsec != UTIME_OMIT) {
 		if (tv[0].tv_nsec == UTIME_NOW)
@@ -2320,14 +2357,12 @@ wimfs_utimens(const char *path, const struct timespec tv[2])
 static int
 wimfs_utime(const char *path, struct utimbuf *times)
 {
-	struct wim_dentry *dentry;
 	struct wim_inode *inode;
-	WIMStruct *w = wimfs_get_WIMStruct();
+	WIMStruct *wim = wimfs_get_WIMStruct();
 
- 	dentry = get_dentry(w, path);
-	if (!dentry)
+	inode = wim_pathname_to_inode(wim, path);
+	if (!inode)
 		return -errno;
-	inode = dentry->d_inode;
 
 	inode->i_last_write_time = unix_timestamp_to_wim(times->modtime);
 	inode->i_last_access_time = unix_timestamp_to_wim(times->actime);
@@ -2350,17 +2385,20 @@ wimfs_write(const char *path, const char *buf, size_t size,
 
 	wimlib_assert(fd->f_lte != NULL);
 	wimlib_assert(fd->f_lte->staging_file_name != NULL);
-	wimlib_assert(fd->staging_fd != -1);
+	wimlib_assert(filedes_valid(&fd->staging_fd));
 	wimlib_assert(fd->f_inode != NULL);
 
 	/* Write the data. */
-	ret = pwrite(fd->staging_fd, buf, size, offset);
+	ret = raw_pwrite(&fd->staging_fd, buf, size, offset);
 	if (ret == -1)
 		return -errno;
 
 	/* Update file size */
-	if (offset + size > fd->f_lte->resource_entry.original_size)
-		fd->f_lte->resource_entry.original_size = offset + size;
+	if (offset + size > fd->f_lte->size) {
+		DEBUG("Update file size %"PRIu64 " => %"PRIu64"",
+		      fd->f_lte->size, offset + size);
+		fd->f_lte->size = offset + size;
+	}
 
 	/* Update timestamps */
 	touch_inode(fd->f_inode);
@@ -2368,15 +2406,9 @@ wimfs_write(const char *path, const char *buf, size_t size,
 }
 
 static struct fuse_operations wimfs_operations = {
-#if 0
-	.access      = wimfs_access,
-#endif
 	.chmod       = wimfs_chmod,
 	.chown       = wimfs_chown,
 	.destroy     = wimfs_destroy,
-#if 0
-	.fallocate   = wimfs_fallocate,
-#endif
 	.fgetattr    = wimfs_fgetattr,
 	.ftruncate   = wimfs_ftruncate,
 	.getattr     = wimfs_getattr,
@@ -2427,21 +2459,17 @@ static struct fuse_operations wimfs_operations = {
 };
 
 
-/* Mounts an image from a WIM file. */
+/* API function documented in wimlib.h  */
 WIMLIBAPI int
 wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
-		   int mount_flags, WIMStruct **additional_swms,
-		   unsigned num_additional_swms,
-		   const char *staging_dir)
+		   int mount_flags, const char *staging_dir)
 {
 	int argc;
 	char *argv[16];
 	int ret;
 	char *dir_copy;
-	struct wim_lookup_table *joined_tab, *wim_tab_save;
 	struct wim_image_metadata *imd;
 	struct wimfs_context ctx;
-	struct hlist_node *cur_node;
 	struct wim_inode *inode;
 
 	DEBUG("Mount: wim = %p, image = %d, dir = %s, flags = %d, ",
@@ -2450,60 +2478,42 @@ wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
 	if (!wim || !dir)
 		return WIMLIB_ERR_INVALID_PARAM;
 
-	ret = verify_swm_set(wim, additional_swms, num_additional_swms);
-	if (ret != 0)
-		return ret;
-
-	if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) && (wim->hdr.total_parts != 1)) {
-		ERROR("Cannot mount a split WIM read-write");
-		return WIMLIB_ERR_SPLIT_UNSUPPORTED;
-	}
-
-	if (num_additional_swms) {
-		ret = new_joined_lookup_table(wim, additional_swms,
-					      num_additional_swms,
-					      &joined_tab);
-		if (ret != 0)
-			return ret;
-		wim_tab_save = wim->lookup_table;
-		wim->lookup_table = joined_tab;
-	}
+	if (mount_flags & ~(WIMLIB_MOUNT_FLAG_READWRITE |
+			    WIMLIB_MOUNT_FLAG_DEBUG |
+			    WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_NONE |
+			    WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR |
+			    WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS |
+			    WIMLIB_MOUNT_FLAG_UNIX_DATA |
+			    WIMLIB_MOUNT_FLAG_ALLOW_OTHER))
+		return WIMLIB_ERR_INVALID_PARAM;
 
 	if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
-		ret = wim_run_full_verifications(wim);
-		if (ret != 0)
-			goto out;
+		ret = can_delete_from_wim(wim);
+		if (ret)
+			return ret;
 	}
 
 	ret = select_wim_image(wim, image);
-	if (ret != 0)
-		goto out;
+	if (ret)
+		return ret;
 
 	DEBUG("Selected image %d", image);
 
 	imd = wim_get_current_image_metadata(wim);
 
-	if (imd->root_dentry->refcnt != 1) {
-		ERROR("Cannot mount image that was just exported with "
-		      "wimlib_export_image()");
-		ret = WIMLIB_ERR_INVALID_PARAM;
-		goto out;
-	}
-
-	if (imd->inode_list.first) /* May be unneeded? */
-		imd->inode_list.first->pprev = &imd->inode_list.first;
-
 	if (imd->modified) {
-		ERROR("Cannot mount image that was added "
-		      "with wimlib_add_image()");
-		ret = WIMLIB_ERR_INVALID_PARAM;
-		goto out;
+		/* wimfs_read() only supports a limited number of stream
+		 * locations, not including RESOURCE_IN_FILE_ON_DISK,
+		 * RESOURCE_IN_NTFS_VOLUME, etc. that might appear if files were
+		 * added to the WIM image.  */
+		ERROR("Cannot mount an image with newly added files!");
+		return WIMLIB_ERR_INVALID_PARAM;
 	}
 
 	if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
-		ret = lock_wim(wim, wim->fp);
-		if (ret != 0)
-			goto out;
+		ret = lock_wim(wim, wim->in_fd.fd);
+		if (ret)
+			return ret;
 	}
 
 	/* Use default stream interface if one was not specified */
@@ -2512,7 +2522,6 @@ wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
 		       WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)))
 		mount_flags |= WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR;
 
-
 	DEBUG("Initializing struct wimfs_context");
 	init_wimfs_context(&ctx);
 	ctx.wim = wim;
@@ -2520,28 +2529,30 @@ wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
 	ctx.image_inode_list = &imd->inode_list;
 	ctx.default_uid = getuid();
 	ctx.default_gid = getgid();
+	wimlib_assert(list_empty(&imd->unhashed_streams));
 	if (mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
 		ctx.default_lookup_flags = LOOKUP_FLAG_ADS_OK;
 
 	DEBUG("Unlinking message queues in case they already exist");
 	ret = set_message_queue_names(&ctx, dir);
-	if (ret != 0)
+	if (ret)
 		goto out_unlock;
 	unlink_message_queues(&ctx);
 
 	DEBUG("Preparing arguments to fuse_main()");
 
 	dir_copy = STRDUP(dir);
-	if (!dir_copy)
+	if (!dir_copy) {
+		ret = WIMLIB_ERR_NOMEM;
 		goto out_free_message_queue_names;
+	}
 
 	argc = 0;
-	argv[argc++] = "imagex";
+	argv[argc++] = "wimlib";
 	argv[argc++] = dir_copy;
 
- 	/* disable multi-threaded operation for read-write mounts */
-	if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
-		argv[argc++] = "-s";
+	/* disable multi-threaded operation */
+	argv[argc++] = "-s";
 
 	if (mount_flags & WIMLIB_MOUNT_FLAG_DEBUG)
 		argv[argc++] = "-d";
@@ -2563,7 +2574,7 @@ wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
 	if ((mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)) {
 		/* Read-write mount.  Make the staging directory */
 		ret = make_staging_dir(&ctx, staging_dir);
-		if (ret != 0)
+		if (ret)
 			goto out_free_dir_copy;
 	} else {
 		/* Read-only mount */
@@ -2586,20 +2597,45 @@ wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
 	}
 #endif
 
-	/* Mark dentry tree as modified if read-write mount. */
+	/* Assign inode numbers.  Also, if a read-write mount was requested,
+	 * mark the dentry tree as modified, and add each stream referenced by
+	 * files in the image to a list and preemptively double the number of
+	 * references to each.  The latter is done to allow implementing the
+	 * WIMLIB_UNMOUNT_FLAG_NEW_IMAGE semantics.  */
+	ctx.next_ino = 1;
+	INIT_LIST_HEAD(&ctx.orig_stream_list);
 	if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
 		imd->modified = 1;
-		imd->has_been_mounted_rw = 1;
+		image_for_each_inode(inode, imd) {
+			inode->i_ino = ctx.next_ino++;
+			for (unsigned i = 0; i <= inode->i_num_ads; i++) {
+				struct wim_lookup_table_entry *lte;
+
+				lte = inode_stream_lte(inode, i, wim->lookup_table);
+				if (lte)
+					lte->out_refcnt = 0;
+			}
+		}
+		image_for_each_inode(inode, imd) {
+			for (unsigned i = 0; i <= inode->i_num_ads; i++) {
+				struct wim_lookup_table_entry *lte;
+
+				lte = inode_stream_lte(inode, i,
+						       wim->lookup_table);
+				if (lte) {
+					if (lte->out_refcnt == 0)
+						list_add(&lte->orig_stream_list,
+							 &ctx.orig_stream_list);
+					lte->out_refcnt += inode->i_nlink;
+					lte->refcnt += inode->i_nlink;
+				}
+			}
+		}
+	} else {
+		image_for_each_inode(inode, imd)
+			inode->i_ino = ctx.next_ino++;
 	}
 
-	/* Resolve the lookup table entries for every inode in the image, and
-	 * assign inode numbers */
-	DEBUG("Resolving lookup table entries and assigning inode numbers");
-	ctx.next_ino = 1;
-	hlist_for_each_entry(inode, cur_node, &imd->inode_list, i_hlist) {
-		inode_resolve_ltes(inode, wim->lookup_table);
-		inode->i_ino = ctx.next_ino++;
-	}
 	DEBUG("(next_ino = %"PRIu64")", ctx.next_ino);
 
 	DEBUG("Calling fuse_main()");
@@ -2621,6 +2657,8 @@ wimlib_mount_image(WIMStruct *wim, int image, const char *dir,
 		close_message_queues(&ctx);
 	}
 
+	release_extra_refcnts(&ctx);
+
 	/* Try to delete the staging directory if a deletion wasn't yet
 	 * attempted due to an earlier error */
 	if (ctx.staging_dir_name)
@@ -2631,25 +2669,25 @@ out_unlock:
 	wim->wim_locked = 0;
 out_free_message_queue_names:
 	free_message_queue_names(&ctx);
-out:
-	if (num_additional_swms) {
-		free_lookup_table(wim->lookup_table);
-		wim->lookup_table = wim_tab_save;
-	}
 	return ret;
 }
 
-/*
- * Unmounts the WIM file that was previously mounted on @dir by using
- * wimlib_mount_image().
- */
+/* API function documented in wimlib.h  */
 WIMLIBAPI int
-wimlib_unmount_image(const char *dir, int unmount_flags,
-		     wimlib_progress_func_t progress_func)
+wimlib_unmount_image_with_progress(const tchar *dir, int unmount_flags,
+				   wimlib_progress_func_t progfunc, void *progctx)
 {
 	int ret;
 	struct wimfs_context wimfs_ctx;
 
+	if (unmount_flags & ~(WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY |
+			      WIMLIB_UNMOUNT_FLAG_COMMIT |
+			      WIMLIB_UNMOUNT_FLAG_REBUILD |
+			      WIMLIB_UNMOUNT_FLAG_RECOMPRESS |
+			      WIMLIB_UNMOUNT_FLAG_LAZY |
+			      WIMLIB_UNMOUNT_FLAG_NEW_IMAGE))
+		return WIMLIB_ERR_INVALID_PARAM;
+
 	init_wimfs_context(&wimfs_ctx);
 
 	ret = set_message_queue_names(&wimfs_ctx, dir);
@@ -2662,11 +2700,11 @@ wimlib_unmount_image(const char *dir, int unmount_flags,
 
 	ret = send_unmount_request_msg(wimfs_ctx.unmount_to_daemon_mq,
 				       unmount_flags,
-				       progress_func != NULL);
+				       progfunc != NULL);
 	if (ret != 0)
 		goto out_close_message_queues;
 
-	ret = execute_fusermount(dir);
+	ret = execute_fusermount(dir, (unmount_flags & WIMLIB_UNMOUNT_FLAG_LAZY) != 0);
 	if (ret != 0)
 		goto out_close_message_queues;
 
@@ -2675,7 +2713,8 @@ wimlib_unmount_image(const char *dir, int unmount_flags,
 			.timeout_seconds = 5,
 		},
 		.daemon_pid = 0,
-		.progress_func = progress_func,
+		.progfunc = progfunc,
+		.progctx = progctx,
 	};
 
 	ret = message_loop(wimfs_ctx.daemon_to_unmount_mq,
@@ -2695,7 +2734,7 @@ out:
 
 
 static int
-mount_unsupported_error()
+mount_unsupported_error(void)
 {
 #if defined(__WIN32__)
 	ERROR("Sorry-- Mounting WIM images is not supported on Windows!");
@@ -2707,19 +2746,24 @@ mount_unsupported_error()
 }
 
 WIMLIBAPI int
-wimlib_unmount_image(const tchar *dir, int unmount_flags,
-		     wimlib_progress_func_t progress_func)
+wimlib_unmount_image_with_progress(const tchar *dir, int unmount_flags,
+				   wimlib_progress_func_t progfunc, void *progctx)
 {
 	return mount_unsupported_error();
 }
 
 WIMLIBAPI int
 wimlib_mount_image(WIMStruct *wim, int image, const tchar *dir,
-		   int mount_flags, WIMStruct **additional_swms,
-		   unsigned num_additional_swms,
-		   const tchar *staging_dir)
+		   int mount_flags, const tchar *staging_dir)
 {
 	return mount_unsupported_error();
 }
 
 #endif /* !WITH_FUSE */
+
+
+WIMLIBAPI int
+wimlib_unmount_image(const tchar *dir, int unmount_flags)
+{
+	return wimlib_unmount_image_with_progress(dir, unmount_flags, NULL, NULL);
+}