*/
/*
- * Copyright (C) 2012, 2013, 2014, 2015 Eric Biggers
+ * Copyright (C) 2012-2016 Eric Biggers
*
* This file is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
#define FUSE_USE_VERSION 26
-#include <attr/xattr.h>
+#include <sys/types.h> /* sometimes required before <sys/xattr.h> */
+#include <sys/xattr.h>
#include <dirent.h>
#include <errno.h>
#include <fuse.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
-#include <sys/types.h>
#include <unistd.h>
#include <utime.h>
# define O_NOFOLLOW 0 /* Security only... */
#endif
+#ifndef ENOATTR
+# define ENOATTR ENODATA
+#endif
+
#define WIMFS_MQUEUE_NAME_LEN 32
#define WIMLIB_UNMOUNT_FLAG_SEND_PROGRESS 0x80000000
uid_t owner_uid;
gid_t owner_gid;
+ /* Absolute path to the mountpoint directory (may be needed for absolute
+ * symbolic link fixups) */
+ char *mountpoint_abspath;
+ size_t mountpoint_abspath_nchars;
+
/* Information about the staging directory for a read-write mount. */
int parent_dir_fd;
int staging_dir_fd;
/* Number of file descriptors open to the mounted WIM image. */
unsigned long num_open_fds;
- /* Original list of blobs in the mounted image, linked by
- * 'struct blob_descriptor'.orig_blob_list. */
- struct list_head orig_blob_list;
+ /* For read-write mounts, the original metadata resource of the mounted
+ * image. */
+ struct blob_descriptor *metadata_resource;
/* Parameters for unmounting the image (can be set via extended
* attribute "wimfs.unmount_info"). */
struct wim_inode_stream *strm;
if (!stream_name || !*stream_name) {
- strm = inode_get_unnamed_stream(inode, STREAM_TYPE_DATA);
+ strm = inode_get_unnamed_data_stream(inode);
} else {
const utf16lechar *uname;
* The path at which to create the first link to the new file. If a file
* already exists at this path, -EEXIST is returned.
* @mode
- * The UNIX mode for the new file. This is only honored if
+ * The UNIX mode for the new file. This is only fully honored if
* WIMLIB_MOUNT_FLAG_UNIX_DATA was passed to wimlib_mount_image().
* @rdev
* The device ID for the new file, encoding the major and minor device
* numbers. This is only honored if WIMLIB_MOUNT_FLAG_UNIX_DATA was passed
* to wimlib_mount_image().
- * @attributes
- * Windows file attributes to use for the new file.
* @dentry_ret
* On success, a pointer to the new dentry is returned here. Its d_inode
* member will point to the new inode that was created for it and added to
*/
static int
create_file(struct fuse_context *fuse_ctx, const char *path,
- mode_t mode, dev_t rdev, u32 attributes,
- struct wim_dentry **dentry_ret)
+ mode_t mode, dev_t rdev, struct wim_dentry **dentry_ret)
{
struct wimfs_context *wimfs_ctx = WIMFS_CTX(fuse_ctx);
struct wim_dentry *parent;
const char *basename;
- struct wim_dentry *new_dentry;
- struct wim_inode *new_inode;
+ struct wim_dentry *dentry;
+ struct wim_inode *inode;
parent = get_parent_dentry(wimfs_ctx->wim, path, WIMLIB_CASE_SENSITIVE);
if (!parent)
if (get_dentry_child_with_name(parent, basename, WIMLIB_CASE_SENSITIVE))
return -EEXIST;
- if (new_dentry_with_new_inode(basename, true, &new_dentry))
+ if (new_dentry_with_new_inode(basename, true, &dentry))
return -ENOMEM;
- new_inode = new_dentry->d_inode;
+ inode = dentry->d_inode;
+
+ inode->i_ino = wimfs_ctx->next_ino++;
- new_inode->i_ino = wimfs_ctx->next_ino++;
- new_inode->i_attributes = attributes;
+ /* Note: we still use FILE_ATTRIBUTE_NORMAL for device nodes, named
+ * pipes, and sockets. The real mode is in the UNIX metadata. */
+ if (S_ISDIR(mode))
+ inode->i_attributes = FILE_ATTRIBUTE_DIRECTORY;
+ else
+ inode->i_attributes = FILE_ATTRIBUTE_NORMAL;
if (wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA) {
struct wimlib_unix_data unix_data;
unix_data.gid = fuse_ctx->gid;
unix_data.mode = fuse_mask_mode(mode, fuse_ctx);
unix_data.rdev = rdev;
- if (!inode_set_unix_data(new_inode, &unix_data, UNIX_DATA_ALL))
+ if (!inode_set_unix_data(inode, &unix_data, UNIX_DATA_ALL))
{
- free_dentry(new_dentry);
+ free_dentry(dentry);
return -ENOMEM;
}
}
- list_add_tail(&new_inode->i_list,
- &wim_get_current_image_metadata(wimfs_ctx->wim)->inode_list);
+ hlist_add_head(&inode->i_hlist_node,
+ &wim_get_current_image_metadata(wimfs_ctx->wim)->inode_list);
- dentry_add_child(parent, new_dentry);
+ dentry_add_child(parent, dentry);
- *dentry_ret = new_dentry;
+ *dentry_ret = dentry;
return 0;
}
return inode_unix_file_type(inode) | 0777;
}
+static u64
+blob_size(const struct blob_descriptor *blob)
+{
+ if (!blob)
+ return 0;
+ return blob->size;
+}
+
+static u64
+blob_stored_size(const struct blob_descriptor *blob)
+{
+ if (!blob)
+ return 0;
+ if (blob->blob_location == BLOB_IN_WIM &&
+ blob->size == blob->rdesc->uncompressed_size)
+ return blob->rdesc->size_in_wim;
+ return blob->size;
+}
+
/*
* Retrieve standard UNIX metadata ('struct stat') for a WIM inode.
*
}
stbuf->st_ino = inode->i_ino;
stbuf->st_nlink = inode->i_nlink;
- if (blob)
- stbuf->st_size = blob->size;
+ stbuf->st_size = blob_size(blob);
#ifdef HAVE_STAT_NANOSECOND_PRECISION
stbuf->st_atim = wim_timestamp_to_timespec(inode->i_last_access_time);
stbuf->st_mtim = wim_timestamp_to_timespec(inode->i_last_write_time);
stbuf->st_mtime = wim_timestamp_to_time_t(inode->i_last_write_time);
stbuf->st_ctime = stbuf->st_mtime;
#endif
- stbuf->st_blocks = DIV_ROUND_UP(stbuf->st_size, 512);
+ stbuf->st_blocks = DIV_ROUND_UP(blob_stored_size(blob), 512);
return 0;
}
filedes_init(&fd, staging_fd);
errno = 0;
extract_size = min(old_blob->size, size);
- result = extract_blob_to_fd(old_blob, &fd, extract_size);
+ result = extract_blob_prefix_to_fd(old_blob, extract_size, &fd);
} else {
extract_size = 0;
result = 0;
close(ctx->parent_dir_fd);
}
-/* Number the inodes in the mounted image sequentially. */
static void
-reassign_inode_numbers(struct wimfs_context *ctx)
+prepare_inodes(struct wimfs_context *ctx)
{
struct wim_image_metadata *imd;
struct wim_inode *inode;
ctx->next_ino = 1;
imd = wim_get_current_image_metadata(ctx->wim);
- image_for_each_inode(inode, imd)
+ image_for_each_inode(inode, imd) {
inode->i_ino = ctx->next_ino++;
-}
-
-static void
-release_extra_refcnts(struct wimfs_context *ctx)
-{
- struct list_head *list = &ctx->orig_blob_list;
- struct blob_table *blob_table = ctx->wim->blob_table;
- struct blob_descriptor *blob, *tmp;
-
- list_for_each_entry_safe(blob, tmp, list, orig_blob_list)
- blob_subtract_refcnt(blob, blob_table, blob->out_refcnt);
+ inode->i_num_opened_fds = 0;
+ inode->i_num_allocated_fds = 0;
+ inode->i_fds = NULL;
+ }
}
/* Delete the 'struct blob_descriptor' for any stream that was modified
static void
close_all_fds(struct wimfs_context *ctx)
{
- struct wim_inode *inode, *tmp;
+ struct wim_inode *inode;
+ struct hlist_node *tmp;
struct wim_image_metadata *imd;
imd = wim_get_current_image_metadata(ctx->wim);
- list_for_each_entry_safe(inode, tmp, &imd->inode_list, i_list)
+ image_for_each_inode_safe(inode, tmp, imd)
inode_close_fds(inode);
}
renew_current_image(struct wimfs_context *ctx)
{
WIMStruct *wim = ctx->wim;
- int idx = wim->current_image - 1;
- struct wim_image_metadata *imd = wim->image_metadata[idx];
- struct wim_image_metadata *replace_imd;
- struct blob_descriptor *new_blob;
+ int image = wim->current_image;
+ struct wim_image_metadata *imd;
+ struct wim_inode *inode;
int ret;
- /* Create 'replace_imd' structure to use for the reset original,
- * unmodified image. */
ret = WIMLIB_ERR_NOMEM;
- replace_imd = new_image_metadata();
- if (!replace_imd)
+ imd = new_unloaded_image_metadata(ctx->metadata_resource);
+ if (!imd)
goto err;
- /* Create new blob descriptor for the modified image's metadata
- * resource, which doesn't exist yet. */
- ret = WIMLIB_ERR_NOMEM;
- new_blob = new_blob_descriptor();
- if (!new_blob)
- goto err_put_replace_imd;
- new_blob->refcnt = 1;
- new_blob->flags = WIM_RESHDR_FLAG_METADATA;
- new_blob->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);
+ ret = append_image_metadata(wim, wim->image_metadata[image - 1]);
if (ret)
- goto err_free_new_blob;
+ goto err_put_imd;
- ret = xml_add_image(wim, "");
+ ret = xml_export_image(wim->xml_info, image,
+ wim->xml_info, NULL, NULL, false);
if (ret)
goto err_undo_append;
- replace_imd->metadata_blob = imd->metadata_blob;
- imd->metadata_blob = new_blob;
- wim->image_metadata[idx] = replace_imd;
+ wim->image_metadata[image - 1] = imd;
wim->current_image = wim->hdr.image_count;
+
+ ret = select_wim_image(wim, image);
+ if (ret)
+ goto err_undo_export;
+
+ image_for_each_inode(inode, imd) {
+ for (unsigned i = 0; i < inode->i_num_streams; i++) {
+ struct blob_descriptor *blob;
+
+ blob = stream_blob(&inode->i_streams[i],
+ wim->blob_table);
+ if (blob)
+ blob->refcnt += inode->i_nlink;
+ }
+ }
+
+ select_wim_image(wim, wim->hdr.image_count);
+ ctx->metadata_resource = NULL;
return 0;
+err_undo_export:
+ xml_delete_image(wim->xml_info, wim->hdr.image_count);
+ wim->image_metadata[image - 1] = wim->image_metadata[wim->hdr.image_count - 1];
+ wim->current_image = image;
err_undo_append:
wim->hdr.image_count--;
-err_free_new_blob:
- free_blob_descriptor(new_blob);
-err_put_replace_imd:
- put_image_metadata(replace_imd, NULL);
+err_put_imd:
+ imd->metadata_blob = NULL;
+ put_image_metadata(imd);
err:
return ret;
}
int ret = renew_current_image(ctx);
if (ret)
return ret;
- } else {
- release_extra_refcnts(ctx);
}
- INIT_LIST_HEAD(&ctx->orig_blob_list);
delete_empty_blobs(ctx);
- xml_update_image_info(ctx->wim, ctx->wim->current_image);
write_flags = 0;
size_t size)
{
const struct wimfs_context *ctx = wimfs_get_context();
- struct wim_inode *inode;
- struct wim_inode_stream *strm;
- struct blob_descriptor *blob;
+ const struct wim_inode *inode;
+ const struct wim_inode_stream *strm;
+ const struct blob_descriptor *blob;
if (!strncmp(name, "wimfs.", 6)) {
/* Handle some magical extended attributes. These really should
if (size < blob->size)
return -ERANGE;
- if (read_full_blob_into_buf(blob, value))
+ if (read_blob_into_buf(blob, value))
return errno ? -errno : -EIO;
}
return blob->size;
int ret;
/* Note: according to fuse.h, mode may not include S_IFDIR */
- ret = create_file(fuse_get_context(), path, mode | S_IFDIR, 0,
- FILE_ATTRIBUTE_DIRECTORY, &dentry);
+ ret = create_file(fuse_get_context(), path, mode | S_IFDIR, 0, &dentry);
if (ret)
return ret;
touch_parent(dentry);
!(wimfs_ctx->mount_flags & WIMLIB_MOUNT_FLAG_UNIX_DATA))
return -EPERM;
- /* Note: we still use FILE_ATTRIBUTE_NORMAL for device nodes,
- * named pipes, and sockets. The real mode is in the UNIX
- * metadata. */
- ret = create_file(fuse_ctx, path, mode, rdev,
- FILE_ATTRIBUTE_NORMAL, &dentry);
+ ret = create_file(fuse_ctx, path, mode, rdev, &dentry);
if (ret)
return ret;
touch_parent(dentry);
(!blob || blob->blob_location != BLOB_IN_STAGING_FILE)) {
ret = extract_blob_to_staging_dir(inode,
strm,
- blob ? blob->size : 0,
+ blob_size(blob),
ctx);
if (ret)
return ret;
return -errno;
if (!inode_is_directory(inode))
return -ENOTDIR;
- strm = inode_get_unnamed_stream(inode, STREAM_TYPE_DATA);
+ strm = inode_get_unnamed_data_stream(inode);
if (!strm)
return -ENOTDIR;
ret = alloc_wimfs_fd(inode, strm, &fd);
switch (blob->blob_location) {
case BLOB_IN_WIM:
- if (read_partial_wim_blob_into_buf(blob, size, offset, buf))
+ if (read_partial_wim_blob_into_buf(blob, offset, size, buf))
ret = errno ? -errno : -EIO;
else
ret = size;
break;
case BLOB_IN_STAGING_FILE:
- ret = raw_pread(&fd->f_staging_fd, buf, size, offset);
+ ret = pread(fd->f_staging_fd.fd, buf, size, offset);
if (ret < 0)
ret = -errno;
break;
return ret;
for_inode_child(child, inode) {
- char *file_name_mbs;
- size_t file_name_mbs_nbytes;
+ char *name;
+ size_t name_nbytes;
- ret = utf16le_to_tstr(child->file_name,
- child->file_name_nbytes,
- &file_name_mbs,
- &file_name_mbs_nbytes);
- if (ret)
+ if (utf16le_to_tstr(child->d_name, child->d_name_nbytes,
+ &name, &name_nbytes))
return -errno;
- ret = filler(buf, file_name_mbs, NULL, 0);
- FREE(file_name_mbs);
+ ret = filler(buf, name, NULL, 0);
+ FREE(name);
if (ret)
return ret;
}
}
static int
-wimfs_readlink(const char *path, char *buf, size_t buf_len)
+wimfs_readlink(const char *path, char *buf, size_t bufsize)
{
- WIMStruct *wim = wimfs_get_WIMStruct();
+ struct wimfs_context *ctx = wimfs_get_context();
const struct wim_inode *inode;
- ssize_t ret;
+ int ret;
- inode = wim_pathname_to_inode(wim, path);
+ inode = wim_pathname_to_inode(ctx->wim, path);
if (!inode)
return -errno;
- if (!inode_is_symlink(inode))
- return -EINVAL;
- if (buf_len == 0)
+ if (bufsize <= 0)
return -EINVAL;
- ret = wim_inode_readlink(inode, buf, buf_len - 1, NULL);
- if (ret >= 0) {
- buf[ret] = '\0';
- ret = 0;
- } else if (ret == -ENAMETOOLONG) {
- buf[buf_len - 1] = '\0';
- }
- return ret;
+ ret = wim_inode_readlink(inode, buf, bufsize - 1, NULL,
+ ctx->mountpoint_abspath,
+ ctx->mountpoint_abspath_nchars);
+ if (ret < 0)
+ return ret;
+ buf[ret] = '\0';
+ return 0;
}
/* We use this for both release() and releasedir(), since in both cases we
struct wim_dentry *dentry;
int ret;
- ret = create_file(fuse_ctx, from, S_IFLNK | 0777, 0,
- FILE_ATTRIBUTE_REPARSE_POINT, &dentry);
+ ret = create_file(fuse_ctx, from, S_IFLNK | 0777, 0, &dentry);
if (ret)
return ret;
- dentry->d_inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
ret = wim_inode_set_symlink(dentry->d_inode, to,
wimfs_ctx->wim->blob_table);
if (ret) {
struct wimfs_fd *fd = WIMFS_FD(fi);
ssize_t ret;
- ret = raw_pwrite(&fd->f_staging_fd, buf, size, offset);
+ ret = pwrite(fd->f_staging_fd.fd, buf, size, offset);
if (ret < 0)
return -errno;
/* Get the metadata for the image to mount. */
imd = wim_get_current_image_metadata(wim);
- if (imd->modified) {
- /* To avoid complicating things, we don't support mounting
- * images to which in-memory modifications have already been
- * made. */
+ /* To avoid complicating things, we don't support mounting images to
+ * which in-memory modifications have already been made. */
+ if (is_image_dirty(imd)) {
ERROR("Cannot mount a modified WIM image!");
return WIMLIB_ERR_INVALID_PARAM;
}
if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
+ if (imd->refcnt > 1)
+ return WIMLIB_ERR_IMAGE_HAS_MULTIPLE_REFERENCES;
ret = lock_wim_for_append(wim);
if (ret)
return ret;
}
+ if (wim_has_solid_resources(wim)) {
+ WARNING("Mounting a WIM file containing solid-compressed data; "
+ "file access may be slow.");
+ }
+
/* If the user did not specify an interface for accessing named
* data streams, use the default (extended attributes). */
if (!(mount_flags & (WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_NONE |
ctx.mount_flags = mount_flags;
if (mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
ctx.default_lookup_flags = LOOKUP_FLAG_ADS_OK;
- /* For read-write mount, create the staging directory. */
+
+ /* For read-write mounts, create the staging directory, save a reference
+ * to the image's metadata resource, and mark the image dirty. */
if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
ret = make_staging_dir(&ctx, staging_dir);
if (ret)
- goto out_unlock;
+ goto out;
+ ret = WIMLIB_ERR_NOMEM;
+ ctx.metadata_resource = clone_blob_descriptor(
+ imd->metadata_blob);
+ if (!ctx.metadata_resource)
+ goto out;
+ mark_image_dirty(imd);
}
ctx.owner_uid = getuid();
ctx.owner_gid = getgid();
- /* Add each blob referenced by files in the image to a list and
- * preemptively double the number of references to each. This is done
- * to allow implementing the WIMLIB_UNMOUNT_FLAG_NEW_IMAGE semantics.
- */
- INIT_LIST_HEAD(&ctx.orig_blob_list);
- if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
- unsigned i;
- struct wim_inode *inode;
- struct blob_descriptor *blob;
-
- image_for_each_inode(inode, imd) {
- for (i = 0; i < inode->i_num_streams; i++) {
- blob = stream_blob(&inode->i_streams[i],
- wim->blob_table);
- if (blob)
- blob->out_refcnt = 0;
- }
- }
+ /* Number the inodes in the mounted image sequentially and initialize
+ * the file descriptor arrays */
+ prepare_inodes(&ctx);
- image_for_each_inode(inode, imd) {
- for (i = 0; i < inode->i_num_streams; i++) {
- blob = stream_blob(&inode->i_streams[i],
- wim->blob_table);
- if (blob) {
- if (blob->out_refcnt == 0)
- list_add(&blob->orig_blob_list,
- &ctx.orig_blob_list);
- blob->out_refcnt += inode->i_nlink;
- blob->refcnt += inode->i_nlink;
- }
- }
- }
- }
-
- /* Assign new inode numbers. */
- reassign_inode_numbers(&ctx);
-
- /* If a read-write mount, mark the image as modified. */
- if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
- imd->modified = 1;
+ /* Save the absolute path to the mountpoint directory. */
+ ctx.mountpoint_abspath = realpath(dir, NULL);
+ if (ctx.mountpoint_abspath)
+ ctx.mountpoint_abspath_nchars = strlen(ctx.mountpoint_abspath);
/* Build the FUSE command line. */
/* Cleanup and return. */
if (ret)
ret = WIMLIB_ERR_FUSE;
- release_extra_refcnts(&ctx);
- if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
+out:
+ FREE(ctx.mountpoint_abspath);
+ free_blob_descriptor(ctx.metadata_resource);
+ if (ctx.staging_dir_name)
delete_staging_dir(&ctx);
-out_unlock:
unlock_wim_for_append(wim);
return ret;
}
int mount_flags;
int ret;
- ret = wimlib_global_init(WIMLIB_INIT_FLAG_ASSUME_UTF8);
+ ret = wimlib_global_init(0);
if (ret)
return ret;
git://wimlib.net / wimlib / blobdiff