/* Flags passed to wimlib_mount(). */
int mount_flags;
+ int default_lookup_flags;
+
/* Next inode number to be assigned. */
u64 next_ino;
static inline int get_lookup_flags(const struct wimfs_context *ctx)
{
- if (ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
- return LOOKUP_FLAG_ADS_OK;
- else
- return 0;
+ return ctx->default_lookup_flags;
}
/* Returns nonzero if write permission is requested on the file open flags */
static void inode_put_fd(struct inode *inode, struct wimlib_fd *fd)
{
- wimlib_assert(fd != NULL);
wimlib_assert(inode != NULL);
pthread_mutex_lock(&inode->i_mutex);
static int lte_put_fd(struct lookup_table_entry *lte, struct wimlib_fd *fd)
{
- wimlib_assert(fd != NULL);
wimlib_assert(fd->f_lte == lte);
if (!lte) /* Empty stream with no lookup table entry */
static int close_wimlib_fd(struct wimlib_fd *fd)
{
int ret;
- wimlib_assert(fd != NULL);
DEBUG("Closing fd (inode = %lu, opened = %u, allocated = %u)",
fd->f_inode->ino, fd->f_inode->num_opened_fds,
fd->f_inode->num_allocated_fds);
return 0;
}
+static int create_dentry(struct wimfs_context *ctx, const char *path,
+ struct dentry **dentry_ret)
+{
+ struct dentry *parent;
+ struct dentry *new;
+ const char *basename;
+
+ parent = get_parent_dentry(ctx->wim, path);
+ if (!parent)
+ return -ENOENT;
+
+ if (!dentry_is_directory(parent))
+ return -ENOTDIR;
+
+ basename = path_basename(path);
+ if (get_dentry_child_with_name(parent, basename))
+ return -EEXIST;
+
+ new = new_dentry_with_inode(basename);
+ if (!new)
+ return -ENOMEM;
+
+ new->d_inode->resolved = 1;
+ new->d_inode->ino = ctx->next_ino++;
+ dentry_add_child(parent, new);
+ *dentry_ret = new;
+ return 0;
+}
+
/* Remove a dentry; i.e. remove a reference to the corresponding inode.
*
* If there are no remaining references to the inode either through dentries or
if (lte) {
if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
- wimlib_assert(lte->staging_file_name);
struct stat native_stat;
if (stat(lte->staging_file_name, &native_stat) != 0) {
DEBUG("Failed to stat `%s': %m",
* extract, or NULL if there was no lookup table entry present for the stream
*
* @size: Number of bytes of the stream we want to extract (this supports the
- * wimfs_truncate() function).
+ * wimfs_truncate() function). It may be more than the actual stream length, in
+ * which case the extra space is filled with zeroes.
+ *
+ * @ctx: Context for the WIM filesystem.
+ *
+ * Returns 0 on success or a negative error code on failure.
*/
static int extract_resource_to_staging_dir(struct inode *inode,
u32 stream_id,
int ret;
int fd;
struct lookup_table_entry *old_lte, *new_lte;
+ off_t old_size;
+ off_t extract_size;
DEBUG("Extracting resource to staging dir: inode %"PRIu64", "
"stream id %"PRIu32, inode->ino, stream_id);
old_lte = *lte;
+
+ wimlib_assert(old_lte == NULL ||
+ old_lte->resource_location != RESOURCE_IN_STAGING_FILE);
+
+ /* Create the staging file */
fd = create_staging_file(&staging_file_name, O_WRONLY, ctx);
if (fd == -1)
return -errno;
- if (old_lte)
- ret = extract_wim_resource_to_fd(old_lte, fd, size);
- else
+ /* 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);
+ } else {
ret = 0;
+ extract_size = 0;
+ }
+
+ /* In the case of truncate() to more than the file length, extend the
+ * file with zeroes by calling ftruncate() on the underlying staging
+ * file */
+ if (ret == 0 && size > extract_size)
+ ret = ftruncate(fd, size);
+
+ /* Close the staging file descriptor and check for errors. If there's
+ * an error, unlink the staging file. */
if (ret != 0 || close(fd) != 0) {
if (errno != 0)
ret = -errno;
goto out_delete_staging_file;
}
+ /* Now deal with the lookup table entries. We may be able to re-use the
+ * existing entry, but we may have to create a new one instead. */
+
if (old_lte && inode->link_count == old_lte->refcnt) {
- /* The reference count of the existing lookup table
- * entry is the same as the link count of the inode that
- * contains the stream we're opening. Therefore, ALL
- * the references to the lookup table entry correspond
- * to the stream we're trying to extract, so the lookup
- * table entry can be re-used. */
+ /* The reference count of the existing lookup table entry is the
+ * same as the link count of the inode that contains the stream
+ * we're opening. Therefore, ALL the references to the lookup
+ * table entry correspond to the stream we're trying to extract,
+ * so the lookup table entry can be re-used. */
DEBUG("Re-using lookup table entry");
lookup_table_unlink(ctx->wim->lookup_table, old_lte);
new_lte = old_lte;
} else {
if (old_lte) {
/* There's an existing lookup table entry, but its
- * reference count is creater than the link count for
+ * reference count is greater than the link count for
* the inode containing a stream we're opening.
* Therefore, we need to split the lookup table entry.
- * */
+ */
wimlib_assert(old_lte->refcnt > inode->link_count);
DEBUG("Splitting lookup table entry "
"(inode->link_count = %u, old_lte->refcnt = %u)",
inode->link_count, old_lte->refcnt);
-
}
new_lte = new_lookup_table_entry();
}
}
- new_lte->resource_entry.original_size = size;
new_lte->refcnt = inode->link_count;
new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
new_lte->staging_file_name = staging_file_name;
* Creates a randomly named staging directory and saves its name in the
* filesystem context structure.
*/
-static int make_staging_dir(struct wimfs_context *ctx,
- const char *user_prefix)
+static int make_staging_dir(struct wimfs_context *ctx, const char *user_prefix)
{
static const size_t random_suffix_len = 10;
static const char *common_suffix = ".staging";
static int delete_staging_dir(struct wimfs_context *ctx)
{
int ret;
- wimlib_assert(ctx->staging_dir_name != NULL);
ret = nftw(ctx->staging_dir_name, remove_file_or_directory,
10, FTW_DEPTH);
FREE(ctx->staging_dir_name);
*/
static int open_message_queues(struct wimfs_context *ctx, bool daemon)
{
- int flags;
- int ret;
-
- wimlib_assert(ctx->unmount_to_daemon_mq_name != NULL &&
- ctx->daemon_to_unmount_mq_name != NULL);
+ int unmount_to_daemon_mq_flags = O_WRONLY | O_CREAT;
+ int daemon_to_unmount_mq_flags = O_RDONLY | O_CREAT;
if (daemon)
- flags = O_RDONLY | O_CREAT;
- else
- flags = O_WRONLY | O_CREAT;
+ swap(unmount_to_daemon_mq_flags, daemon_to_unmount_mq_flags);
DEBUG("Opening message queue \"%s\"", ctx->unmount_to_daemon_mq_name);
ctx->unmount_to_daemon_mq = mq_open(ctx->unmount_to_daemon_mq_name,
- flags, 0700, NULL);
+ unmount_to_daemon_mq_flags, 0700, NULL);
if (ctx->unmount_to_daemon_mq == (mqd_t)-1) {
ERROR_WITH_ERRNO("mq_open()");
- ret = WIMLIB_ERR_MQUEUE;
- goto out;
+ return WIMLIB_ERR_MQUEUE;
}
- if (daemon)
- flags = O_WRONLY | O_CREAT;
- else
- flags = O_RDONLY | O_CREAT;
-
DEBUG("Opening message queue \"%s\"", ctx->daemon_to_unmount_mq_name);
ctx->daemon_to_unmount_mq = mq_open(ctx->daemon_to_unmount_mq_name,
- flags, 0700, NULL);
+ daemon_to_unmount_mq_flags, 0700, NULL);
if (ctx->daemon_to_unmount_mq == (mqd_t)-1) {
ERROR_WITH_ERRNO("mq_open()");
- ret = WIMLIB_ERR_MQUEUE;
- goto out_close_unmount_to_daemon_mq;
+ mq_close(ctx->unmount_to_daemon_mq);
+ mq_unlink(ctx->unmount_to_daemon_mq_name);
+ ctx->unmount_to_daemon_mq = (mqd_t)-1;
+ return WIMLIB_ERR_MQUEUE;
}
- ret = 0;
- goto out;
-out_close_unmount_to_daemon_mq:
- mq_close(ctx->unmount_to_daemon_mq);
- mq_unlink(ctx->unmount_to_daemon_mq_name);
- ctx->unmount_to_daemon_mq = (mqd_t)-1;
-out:
- return ret;
+ return 0;
}
/* Try to determine the maximum message size of a message queue. The return
} data;
};
-static int wimfs_access(const char *path, int mask)
-{
- /* Permissions not implemented */
- return 0;
-}
-
-static int wimfs_chmod(const char *path, mode_t mask)
-{
- struct dentry *dentry;
- struct wimfs_context *ctx = wimfs_get_context();
- struct inode *inode;
- struct stat stbuf;
- int ret;
-
- ret = lookup_resource(ctx->wim, path,
- get_lookup_flags(ctx) | LOOKUP_FLAG_DIRECTORY_OK,
- &dentry, NULL, NULL);
- if (ret != 0)
- return ret;
- inode = dentry->d_inode;
- inode_to_stbuf(inode, NULL, &stbuf);
- if (mask == stbuf.st_mode)
- return 0;
- else
- return -EPERM;
-
-}
-
static void inode_update_lte_ptr(struct inode *inode,
struct lookup_table_entry *old_lte,
struct lookup_table_entry *new_lte)
u8 hash[SHA1_HASH_SIZE];
struct stat stbuf;
- wimlib_assert(lte->resource_location == RESOURCE_IN_STAGING_FILE);
- wimlib_assert(lte->staging_file_name);
-
ret = sha1sum(lte->staging_file_name, hash);
if (ret != 0)
return ret;
-
lookup_table_unlink(table, lte);
-
duplicate_lte = __lookup_resource(table, hash);
-
if (duplicate_lte) {
/* Merge duplicate lookup table entries */
duplicate_lte->refcnt += lte->refcnt;
- list_del(<e->staging_list);
inode_update_lte_ptr(lte->lte_inode, lte, duplicate_lte);
free_lookup_table_entry(lte);
} else {
lte->resource_entry.original_size = stbuf.st_size;
lte->resource_entry.size = stbuf.st_size;
lte->resource_location = RESOURCE_IN_FILE_ON_DISK;
- lte->lte_inode = NULL;
+ lte->file_on_disk_fp = NULL;
copy_hash(lte->hash, hash);
lookup_table_insert(table, lte);
}
struct lookup_table_entry *lte, *tmp;
WIMStruct *w = 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);
}
DEBUG("Calculating SHA1 checksums for all new staging files.");
- list_for_each_entry_safe(lte, tmp, &ctx->staging_list, staging_list) {
- ret = update_lte_of_staging_file(lte, ctx->wim->lookup_table);
+ list_for_each_entry(lte, &ctx->staging_list, staging_list) {
+ ret = update_lte_of_staging_file(lte, w->lookup_table);
if (ret != 0)
return ret;
}
xml_update_image_info(w, w->current_image);
-
ret = wimlib_overwrite(w, write_flags, 0, NULL);
- if (ret != 0) {
- ERROR("Failed to commit changes");
- return ret;
- }
+ if (ret != 0)
+ ERROR("Failed to commit changes to mounted WIM image");
return ret;
}
return 0;
}
+static int wimfs_access(const char *path, int mask)
+{
+ /* Permissions not implemented */
+ return 0;
+}
+
+static int wimfs_chmod(const char *path, mode_t mask)
+{
+ struct dentry *dentry;
+ struct wimfs_context *ctx = wimfs_get_context();
+ struct inode *inode;
+ struct stat stbuf;
+ int ret;
+
+ ret = lookup_resource(ctx->wim, path,
+ get_lookup_flags(ctx) | LOOKUP_FLAG_DIRECTORY_OK,
+ &dentry, NULL, NULL);
+ if (ret != 0)
+ return ret;
+ inode = dentry->d_inode;
+ inode_to_stbuf(inode, NULL, &stbuf);
+ if (mask == stbuf.st_mode)
+ return 0;
+ else
+ return -EPERM;
+}
+
/* Called when the filesystem is unmounted. */
static void wimfs_destroy(void *p)
{
struct inode *inode;
struct lookup_table_entry *lte;
WIMStruct *w = wimfs_get_WIMStruct();
+ u16 i;
inode = wim_pathname_to_inode(w, to);
if (!inode)
return -ENOENT;
- if (!inode_is_regular_file(inode))
+ if (inode->attributes & FILE_ATTRIBUTE_REPARSE_POINT)
+ return -EEXIST;
+
+ if (inode->attributes & FILE_ATTRIBUTE_DIRECTORY)
return -EPERM;
from_dentry_parent = get_parent_dentry(w, from);
if (!from_dentry)
return -ENOMEM;
-
inode_add_dentry(from_dentry, inode);
from_dentry->d_inode = inode;
inode->link_count++;
- for (unsigned i = 0; i <= inode->num_ads; i++) {
+ if (inode->lte)
+ inode->lte->refcnt++;
+ for (i = 0; i <= inode->num_ads; i++) {
lte = inode_stream_lte_resolved(inode, i);
if (lte)
lte->refcnt++;
}
-
dentry_add_child(from_dentry_parent, from_dentry);
return 0;
}
size_t needed_size;
struct inode *inode;
struct wimfs_context *ctx = wimfs_get_context();
+ u16 i;
+ char *p;
if (!(ctx->mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR))
return -ENOTSUP;
if (size == 0) {
needed_size = 0;
- for (u16 i = 0; i < inode->num_ads; i++)
+ for (i = 0; i < inode->num_ads; i++)
needed_size += inode->ads_entries[i].stream_name_utf8_len + 6;
return needed_size;
} else {
- char *p = list;
- for (u16 i = 0; i < inode->num_ads; i++) {
+ p = list;
+ for (i = 0; i < inode->num_ads; i++) {
needed_size = inode->ads_entries[i].stream_name_utf8_len + 6;
if (needed_size > size)
return -ERANGE;
}
#endif
-/*
- * Create a directory in the WIM.
- * @mode is currently ignored.
- */
+
+/* Create a directory in the WIM.
+ * @mode is currently ignored. */
static int wimfs_mkdir(const char *path, mode_t mode)
{
- struct dentry *parent;
- struct dentry *newdir;
- const char *basename;
- struct wimfs_context *ctx = wimfs_get_context();
-
- parent = get_parent_dentry(ctx->wim, path);
- if (!parent)
- return -ENOENT;
-
- if (!dentry_is_directory(parent))
- return -ENOTDIR;
-
- basename = path_basename(path);
- if (get_dentry_child_with_name(parent, basename))
- return -EEXIST;
+ struct dentry *dentry;
+ int ret;
- newdir = new_dentry_with_inode(basename);
- newdir->d_inode->attributes |= FILE_ATTRIBUTE_DIRECTORY;
- newdir->d_inode->resolved = true;
- newdir->d_inode->ino = ctx->next_ino++;
- dentry_add_child(parent, newdir);
- return 0;
+ ret = create_dentry(wimfs_get_context(), path, &dentry);
+ if (ret == 0)
+ dentry->d_inode->attributes = FILE_ATTRIBUTE_DIRECTORY;
+ return ret;
}
-/* Creates a regular file. */
+/* Create a regular file in the WIM.
+ * @mode is currently ignored. */
static int wimfs_mknod(const char *path, mode_t mode, dev_t rdev)
{
const char *stream_name;
inode = wim_pathname_to_inode(ctx->wim, path);
if (!inode)
return -ENOENT;
- if (!inode_is_regular_file(inode))
+ if (inode->attributes &
+ (FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY))
return -ENOENT;
if (inode_get_ads_entry(inode, stream_name, NULL))
return -EEXIST;
new_entry = inode_add_ads(inode, stream_name);
if (!new_entry)
return -ENOMEM;
+ return 0;
} else {
- struct dentry *dentry, *parent;
- const char *basename;
+ struct dentry *dentry;
+ int ret;
/* Make a normal file (not an alternate data stream) */
-
- /* Make sure that the parent of @path exists and is a directory, and
- * that the dentry named by @path does not already exist. */
- parent = get_parent_dentry(ctx->wim, path);
- if (!parent)
- return -ENOENT;
- if (!dentry_is_directory(parent))
- return -ENOTDIR;
-
- basename = path_basename(path);
- if (get_dentry_child_with_name(parent, path))
- return -EEXIST;
-
- dentry = new_dentry_with_inode(basename);
- if (!dentry)
- return -ENOMEM;
- dentry->d_inode->resolved = true;
- dentry->d_inode->ino = ctx->next_ino++;
- dentry_add_child(parent, dentry);
+ ret = create_dentry(ctx, path, &dentry);
+ if (ret == 0)
+ dentry->d_inode->attributes = FILE_ATTRIBUTE_NORMAL;
+ return ret;
}
- return 0;
}
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 errno_save = errno;
close_wimlib_fd(fd);
- return -errno;
+ return -errno_save;
}
}
fi->fh = (uintptr_t)fd;
off_t offset, struct fuse_file_info *fi)
{
struct wimlib_fd *fd = (struct wimlib_fd*)(uintptr_t)fi->fh;
+ ssize_t ret;
if (!fd)
return -EBADF;
wimlib_assert(fd->f_lte->staging_file_name);
wimlib_assert(fd->staging_fd != -1);
- ssize_t ret;
DEBUG("Seek to offset %zu", offset);
if (lseek(fd->staging_fd, offset, SEEK_SET) == -1)
return ret;
} else {
/* Read from WIM */
-
- wimlib_assert(fd->f_lte->resource_location == RESOURCE_IN_WIM);
-
u64 res_size = wim_resource_size(fd->f_lte);
-
if (offset > res_size)
return -EOVERFLOW;
-
size = min(size, res_size - offset);
-
if (read_wim_resource(fd->f_lte, (u8*)buf,
size, offset,
WIMLIB_RESOURCE_FLAG_MULTITHREADED) != 0)
dst = get_dentry(w, to);
-
ret = get_names(&file_name_utf16, &file_name_utf8,
&file_name_utf16_len, &file_name_utf8_len,
path_basename(to));
static int wimfs_symlink(const char *to, const char *from)
{
- struct dentry *dentry_parent, *dentry;
- const char *link_name;
- struct inode *inode;
struct wimfs_context *ctx = wimfs_get_context();
+ struct dentry *dentry;
+ int ret;
- dentry_parent = get_parent_dentry(ctx->wim, from);
- if (!dentry_parent)
- return -ENOENT;
- if (!dentry_is_directory(dentry_parent))
- return -ENOTDIR;
-
- link_name = path_basename(from);
-
- if (get_dentry_child_with_name(dentry_parent, link_name))
- return -EEXIST;
- dentry = new_dentry_with_inode(link_name);
- if (!dentry)
- return -ENOMEM;
- inode = dentry->d_inode;
-
- inode->attributes = FILE_ATTRIBUTE_REPARSE_POINT;
- inode->reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
- inode->ino = ctx->next_ino++;
- inode->resolved = true;
-
- if (inode_set_symlink(inode, to, ctx->wim->lookup_table, NULL) != 0)
- goto out_free_dentry;
-
- dentry_add_child(dentry_parent, dentry);
- return 0;
-out_free_dentry:
- free_dentry(dentry);
- return -ENOMEM;
+ ret = create_dentry(ctx, from, &dentry);
+ if (ret == 0) {
+ dentry->d_inode->attributes = FILE_ATTRIBUTE_REPARSE_POINT;
+ dentry->d_inode->reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
+ if (inode_set_symlink(dentry->d_inode, to,
+ ctx->wim->lookup_table, NULL))
+ {
+ unlink_dentry(dentry);
+ free_dentry(dentry);
+ ret = -ENOMEM;
+ }
+ }
+ return ret;
}
if (ret != 0)
return ret;
- if (!lte) /* Already a zero-length file */
+ if (lte == NULL && size == 0)
return 0;
inode = dentry->d_inode;
-
if (stream_idx == 0)
stream_id = 0;
else
stream_id = inode->ads_entries[stream_idx - 1].stream_id;
if (lte->resource_location == RESOURCE_IN_STAGING_FILE) {
- wimlib_assert(lte->staging_file_name);
ret = truncate(lte->staging_file_name, size);
if (ret != 0)
- return -errno;
- lte->resource_entry.original_size = size;
+ ret = -errno;
} else {
- wimlib_assert(lte->resource_location == RESOURCE_IN_WIM);
/* File in WIM. Extract it to the staging directory, but only
* the first @size bytes of it. */
ret = extract_resource_to_staging_dir(inode, stream_id,
return ret;
}
-/* Remove a regular file */
+/* Unlink a non-directory or alternate data stream */
static int wimfs_unlink(const char *path)
{
struct dentry *dentry;
ctx.wim = wim;
ctx.mount_flags = mount_flags;
+ 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)
git://wimlib.net / wimlib / blobdiff