/* Name of the directory on which the WIM file is mounted. */
static const char *mount_dir;
+/* Next hard link group ID to be assigned. These are also used as the inode
+ * numbers. */
+static u64 next_link_group_id;
+
+/* List of lookup table entries in the staging directory */
+static LIST_HEAD(staging_list);
static inline int get_lookup_flags()
{
static int alloc_wimlib_fd(struct lookup_table_entry *lte,
struct wimlib_fd **fd_ret)
{
+ static const u16 fds_per_alloc = 8;
+ static const u16 max_fds = 0xffff;
+
if (lte->num_opened_fds == lte->num_allocated_fds) {
struct wimlib_fd **fds;
- if (lte->num_allocated_fds > 0xffff - 8)
- return -ENFILE;
+ u16 num_new_fds;
+
+ if (lte->num_allocated_fds == max_fds)
+ return -EMFILE;
+ num_new_fds = min(fds_per_alloc, max_fds - lte->num_allocated_fds);
- fds = CALLOC(lte->num_allocated_fds + 8, sizeof(lte->fds[0]));
+ fds = CALLOC(lte->num_allocated_fds + num_new_fds,
+ sizeof(lte->fds[0]));
if (!fds)
return -ENOMEM;
memcpy(fds, lte->fds,
lte->num_allocated_fds * sizeof(lte->fds[0]));
FREE(lte->fds);
lte->fds = fds;
+ lte->num_allocated_fds += num_new_fds;
}
for (u16 i = 0; ; i++) {
- struct wimlib_fd *fd = lte->fds[i];
- if (!fd) {
- fd = CALLOC(1, sizeof(*fd));
+ if (!lte->fds[i]) {
+ struct wimlib_fd *fd = CALLOC(1, sizeof(*fd));
if (!fd)
return -ENOMEM;
fd->staging_fd = -1;
fd->idx = i;
fd->lte = lte;
lte->fds[i] = fd;
+ lte->num_opened_fds++;
*fd_ret = fd;
return 0;
}
if (close(fd->staging_fd) != 0)
return -errno;
}
- if (--lte->num_opened_fds == 0 && lte->refcnt == 0)
+ if (--lte->num_opened_fds == 0 && lte->refcnt == 0) {
+ if (lte->staging_file_name)
+ unlink(lte->staging_file_name);
free_lookup_table_entry(lte);
+ }
lte->fds[fd->idx] = NULL;
FREE(fd);
return 0;
}
+static void remove_dentry(struct dentry *dentry,
+ struct lookup_table *lookup_table)
+{
+ const u8 *hash = dentry->hash;
+ u16 i = 0;
+ struct lookup_table_entry *lte;
+ while (1) {
+ lte = lookup_table_decrement_refcnt(lookup_table, hash);
+ if (lte && lte->num_opened_fds)
+ for (u16 i = 0; i < lte->num_allocated_fds; i++)
+ if (lte->fds[i] && lte->fds[i]->dentry == dentry)
+ lte->fds[i]->dentry = NULL;
+ if (i == dentry->num_ads)
+ break;
+ hash = dentry->ads_entries[i].hash;
+ i++;
+ }
+
+ unlink_dentry(dentry);
+ put_dentry(dentry);
+}
+
+static void dentry_increment_lookup_table_refcnts(struct dentry *dentry,
+ struct lookup_table *lookup_table)
+{
+ u16 i = 0;
+ const u8 *hash = dentry->hash;
+ struct lookup_table_entry *lte;
+ while (1) {
+ lte = __lookup_resource(lookup_table, hash);
+ if (lte)
+ lte->refcnt++;
+ if (i == dentry->num_ads)
+ break;
+ hash = dentry->ads_entries[i].hash;
+ i++;
+ }
+}
+
+/* Transfers file attributes from a struct dentry to a `stat' buffer. */
+int dentry_to_stbuf(const struct dentry *dentry, struct stat *stbuf)
+{
+ struct lookup_table_entry *lte;
+
+ if (dentry_is_symlink(dentry))
+ stbuf->st_mode = S_IFLNK | 0777;
+ else if (dentry_is_directory(dentry))
+ stbuf->st_mode = S_IFDIR | 0755;
+ else
+ stbuf->st_mode = S_IFREG | 0644;
+
+ stbuf->st_ino = (ino_t)dentry->hard_link;
+
+ stbuf->st_nlink = dentry_link_group_size(dentry);
+ stbuf->st_uid = getuid();
+ stbuf->st_gid = getgid();
+
+ /* Use the size of the unnamed (default) file stream. */
+ if ((lte = dentry_lte(dentry))) {
+ if (lte->staging_file_name) {
+ struct stat native_stat;
+ if (stat(lte->staging_file_name, &native_stat) != 0)
+ return -errno;
+ stbuf->st_size = native_stat.st_size;
+ } else {
+ stbuf->st_size = lte->resource_entry.original_size;
+ }
+ } else {
+ stbuf->st_size = 0;
+ }
+
+ stbuf->st_atime = ms_timestamp_to_unix(dentry->last_access_time);
+ stbuf->st_mtime = ms_timestamp_to_unix(dentry->last_write_time);
+ stbuf->st_ctime = ms_timestamp_to_unix(dentry->creation_time);
+ stbuf->st_blocks = (stbuf->st_size + 511) / 512;
+ return 0;
+}
+
+#if 0
+/* Change the hash value of the main or alternate file stream in a hard link
+ * group. This needs to be done if the hash of the corresponding lookup table
+ * entry was changed. */
+static void link_group_set_stream_hash(struct dentry *dentry,
+ unsigned stream_idx,
+ const u8 new_hash[])
+{
+ struct list_head *head, *cur;
+
+ if (stream_idx == 0) {
+ head = &dentry->link_group_list;
+ cur = head;
+ do {
+ dentry = container_of(cur, struct dentry, link_group_list);
+ memcpy(dentry->hash, new_hash, WIM_HASH_SIZE);
+ cur = cur->next;
+ } while (cur != head);
+ } else {
+ /* Dentries in the link group share their alternate stream
+ * entries. */
+ wimlib_assert(stream_idx <= dentry->num_ads);
+ memcpy(dentry->ads_entries[stream_idx - 1].hash, new_hash,
+ WIM_HASH_SIZE);
+ }
+}
+#endif
+
/* Creates a new staging file and returns its file descriptor opened for
* writing.
*
return fd;
}
+/* Removes open file descriptors from a lookup table entry @old_lte where the
+ * file descriptors have opened the corresponding file resource in the context
+ * of the hard link group @link_group; these file descriptors are extracted and
+ * placed in a new lookup table entry, which is returned. */
+static struct lookup_table_entry *
+lte_extract_fds(struct lookup_table_entry *old_lte, u64 link_group)
+{
+ int ret;
+ u16 num_transferred_fds;
+ struct lookup_table_entry *new_lte;
+
+ new_lte = new_lookup_table_entry();
+ if (!new_lte)
+ return NULL;
+
+ num_transferred_fds = 0;
+ for (u16 i = 0; i < old_lte->num_allocated_fds; i++)
+ if (old_lte->fds[i] &&
+ old_lte->fds[i]->dentry->hard_link == link_group)
+ num_transferred_fds++;
+ DEBUG("Transferring %u file descriptors",
+ num_transferred_fds);
+ new_lte->fds = MALLOC(num_transferred_fds * sizeof(new_lte->fds[0]));
+ if (!new_lte->fds) {
+ FREE(new_lte);
+ return NULL;
+ }
+ for (u16 i = 0, j = 0; ; i++) {
+ if (old_lte->fds[i] &&
+ old_lte->fds[i]->dentry->hard_link == link_group) {
+ struct wimlib_fd *fd = old_lte->fds[i];
+ old_lte->fds[i] = NULL;
+ fd->lte = new_lte;
+ fd->idx = j;
+ new_lte->fds[j] = fd;
+ if (++j == num_transferred_fds)
+ break;
+ }
+ }
+ old_lte->num_opened_fds -= num_transferred_fds;
+ new_lte->num_opened_fds = num_transferred_fds;
+ new_lte->num_allocated_fds = num_transferred_fds;
+ return new_lte;
+}
+
+/*
+ * Transfers an alternate data stream entry to a new lookup table entry
+ */
+static void lte_transfer_ads_entry(struct lookup_table_entry *new_lte,
+ struct ads_entry *ads_entry)
+{
+ list_del(&ads_entry->lte_group_list.list);
+ list_add(&ads_entry->lte_group_list.list, &new_lte->lte_group_list);
+ ads_entry->lte = new_lte;
+}
+
+/*
+ * Transfers a dentry to a new lookup table entry
+ */
+static void lte_transfer_dentry(struct lookup_table_entry *new_lte,
+ struct dentry *dentry)
+{
+ list_del(&dentry->lte_group_list.list);
+ list_add(&dentry->lte_group_list.list, &new_lte->lte_group_list);
+ dentry->lte = new_lte;
+}
+
+static void lte_transfer_stream_entries(struct lookup_table_entry *new_lte,
+ struct dentry *dentry,
+ unsigned stream_idx)
+{
+ INIT_LIST_HEAD(&new_lte->lte_group_list);
+ if (stream_idx == 0) {
+ struct list_head *pos;
+ do {
+ struct dentry *d;
+ d = container_of(pos, struct dentry, link_group_list);
+ lte_transfer_dentry(new_lte, d);
+
+ pos = pos->next;
+ } while (pos != &dentry->link_group_list);
+ } else {
+ struct ads_entry *ads_entry;
+ ads_entry = &dentry->ads_entries[stream_idx - 1];
+ lte_transfer_ads_entry(new_lte, ads_entry);
+ }
+}
+
+#if 0
+/*
+ * Transfers streams part of a hard-link group from @old_lte to @new_lte.
+ *
+ * @dentry is one of the dentries in the hard link group
+ * @stream_idx is the index of the stream that we're transferring.
+ */
+static void lte_transfer_stream_entries(struct lookup_table_entry *old_lte,
+ struct lookup_table_entry *new_lte,
+ struct dentry *dentry, unsigned stream_idx)
+{
+ INIT_LIST_HEAD(&new_lte->lte_group_list);
+
+ if (stream_idx == 0) {
+ struct list_head *pos;
+ struct stream_list_head *head;
+ struct dentry *other_dentry;
+ list_for_each(pos, &old_lte->lte_group_list) {
+ head = container_of(pos, struct stream_list_head, head);
+ if (head->type != STREAM_TYPE_NORMAL) {
+ continue;
+ other_dentry = container_of(head, struct dentry,
+ lte_group_list);
+ if (other_dentry->hard_link != dentry->link_group)
+ continue;
+
+ list_del(&other_dentry->lte_group_list.list);
+ list_add(&other_dentry->lte_group_list.list,
+ &new_lte->lte_group_list);
+ other_dentry->lte = new_lte;
+ }
+ } else {
+ /* ADS entries are shared within a hard link group. */
+ lte_load_ads_entry(new_lte, &dentry->ads_entries[stream_idx - 1]);
+ }
+}
+static void lte__stream_entries(struct lookup_table_entry *new_lte,
+ struct dentry *dentry, unsigned stream_idx)
+{
+ INIT_LIST_HEAD(new_lte->lte_group_list);
+ if (stream_idx == 0) {
+ struct list_head *cur;
+ do {
+ struct dentry *d;
+
+ d = container_of(cur, struct dentry, link_group_list);
+ list_del(&d->lte_group_list);
+ list_add(&d->lte_group_list, &new_lte->lte_group_list);
+ d->lte = new_lte;
+ cur = cur->next;
+ } while (cur != &dentry->link_group_list);
+ } else {
+ lte_load_ads_entry(new_lte, &dentry->ads_entries[stream_idx - 1]);
+ }
+}
+#endif
+
+
/*
* Extract a WIM resource to the staging directory.
*
* dentry
*/
static int extract_resource_to_staging_dir(struct dentry *dentry,
+ unsigned stream_idx,
struct lookup_table_entry **lte,
off_t size)
{
int fd;
struct lookup_table_entry *old_lte, *new_lte;
size_t link_group_size;
-
+
+ DEBUG("Extracting resource `%s' to staging directory", dentry->full_path_utf8);
+
old_lte = *lte;
fd = create_staging_file(&staging_file_name, O_WRONLY);
if (fd == -1)
else
ret = -EIO;
close(fd);
- unlink(staging_file_name);
- FREE(staging_file_name);
- return ret;
+ goto out_delete_staging_file;
}
link_group_size = dentry_link_group_size(dentry);
if (link_group_size == old_lte->refcnt) {
/* This hard link group is the only user of the lookup
* table entry, so we can re-use it. */
+ DEBUG("Re-using lookup table entry");
lookup_table_remove(w->lookup_table, old_lte);
new_lte = old_lte;
} else {
+ DEBUG("Splitting lookup table entry "
+ "(link_group_size = %u, lte refcnt = %u)",
+ link_group_size, old_lte->refcnt);
/* Split a hard link group away from the "lookup table
* entry" hard link group (i.e. we had two hard link
* groups that were identical, but now we are changing
* streams themselves are not hardlinked. */
wimlib_assert(old_lte->refcnt > link_group_size);
- new_lte = new_lookup_table_entry();
- if (!new_lte)
- return -ENOMEM;
-
- u16 num_transferred_fds = 0;
- for (u16 i = 0; i < old_lte->num_allocated_fds; i++) {
- if (old_lte->fds[i] &&
- old_lte->fds[i]->dentry->hard_link ==
- dentry->hard_link)
- {
- num_transferred_fds++;
- }
+ new_lte = lte_extract_fds(old_lte, dentry->hard_link);
+ if (!new_lte) {
+ ret = -ENOMEM;
+ goto out_delete_staging_file;
}
- new_lte->fds = MALLOC(num_transferred_fds *
- sizeof(new_lte->fds[0]));
- if (!new_lte->fds) {
- free_lookup_table_entry(new_lte);
- return -ENOMEM;
- }
- u16 j = 0;
- for (u16 i = 0; i < old_lte->num_allocated_fds; i++) {
- if (old_lte->fds[i] &&
- old_lte->fds[i]->dentry->hard_link ==
- dentry->hard_link)
- {
- struct wimlib_fd *fd = old_lte->fds[i];
- old_lte->fds[i] = NULL;
- fd->lte = new_lte;
- fd->idx = j;
- new_lte->fds[j] = fd;
- }
- }
- old_lte->refcnt -= link_group_size;
- old_lte->num_opened_fds -= j;
- new_lte->num_opened_fds = j;
+ lte_transfer_stream_entries(new_lte, dentry, stream_idx);
+ old_lte->refcnt -= link_group_size;
}
+ } else {
+ /* No old_lte was supplied, so the resource had no lookup table
+ * entry before (it must be an empty resource) */
+ new_lte = new_lookup_table_entry();
+ if (!new_lte) {
+ ret = -ENOMEM;
+ goto out_delete_staging_file;
+ }
+ lte_transfer_stream_entries(new_lte, dentry, stream_idx);
}
new_lte->resource_entry.original_size = size;
new_lte->refcnt = link_group_size;
new_lte->staging_file_name = staging_file_name;
lookup_table_insert(w->lookup_table, new_lte);
+ list_add(&new_lte->staging_list, &staging_list);
*lte = new_lte;
return 0;
+out_delete_staging_file:
+ unlink(staging_file_name);
+ FREE(staging_file_name);
+ return ret;
}
/*
/* Closes the staging file descriptor associated with the lookup table entry, if
* it is opened. */
-static int close_lte_fds(struct lookup_table_entry *lte, void *ignore)
+static int close_lte_fds(struct lookup_table_entry *lte)
{
- for (u16 i = 0; i < lte->num_opened_fds; i++) {
+ for (u16 i = 0, j = 0; j < lte->num_opened_fds; i++) {
if (lte->fds[i] && lte->fds[i]->staging_fd != -1) {
if (close(lte->fds[i]->staging_fd) != 0) {
ERROR_WITH_ERRNO("Failed close file `%s'",
lte->staging_file_name);
return WIMLIB_ERR_WRITE;
}
+ j++;
}
}
return 0;
* file. Updates the SHA1 sum in the dentry and the lookup table entry. If
* there is already a lookup table entry with the same checksum, increment its
* reference count and destroy the lookup entry with the updated checksum. */
-static int calculate_sha1sum_for_staging_file(struct dentry *dentry,
- void *_lookup_table)
+static int calculate_sha1sum_of_staging_file(struct dentry *dentry,
+ void *__lookup_table)
{
- struct lookup_table *lookup_table = _lookup_table;
+ struct lookup_table *lookup_table = __lookup_table;
u8 *hash = dentry->hash;
u16 i = 0;
while (1) {
static int rebuild_wim(WIMStruct *w, bool check_integrity)
{
int ret;
- struct dentry *root;
-
- root = wim_root_dentry(w);
+ struct lookup_table_entry *lte;
- DEBUG("Closing all staging file descriptors.");
/* Close all the staging file descriptors. */
- ret = for_lookup_table_entry(w->lookup_table, close_lte_fds, NULL);
- if (ret != 0) {
- ERROR("Failed to close all staging files");
- return ret;
+ DEBUG("Closing all staging file descriptors.");
+ list_for_each_entry(lte, &staging_list, staging_list) {
+ ret = close_lte_fds(lte);
+ if (ret != 0)
+ return ret;
}
- DEBUG("Calculating SHA1 checksums for all new staging files.");
/* Calculate SHA1 checksums for all staging files, and merge unnecessary
* lookup table entries. */
- ret = for_dentry_in_tree(root, calculate_sha1sum_for_staging_file,
- w->lookup_table);
- if (ret != 0) {
- ERROR("Failed to calculate new SHA1 checksums");
+ DEBUG("Calculating SHA1 checksums for all new staging files.");
+ ret = for_dentry_in_tree(wim_root_dentry(w),
+ calculate_sha1sum_of_staging_file, w->lookup_table);
+ if (ret != 0)
return ret;
- }
xml_update_image_info(w, w->current_image);
/* Called when the filesystem is unmounted. */
static void wimfs_destroy(void *p)
{
-
/* For read-write mounts, the `imagex unmount' command, which is
* running in a separate process and is executing the
* wimlib_unmount() function, will send this process a byte
close_message_queues();
}
+static int wimfs_fallocate(const char *path, int mode,
+ off_t offset, off_t len, struct fuse_file_info *fi)
+{
+ struct wimlib_fd *fd = (struct wimlib_fd*)fi->fh;
+ wimlib_assert(fd->staging_fd != -1);
+ return fallocate(fd->staging_fd, mode, offset, len);
+}
+
+static int wimfs_fgetattr(const char *path, struct stat *stbuf,
+ struct fuse_file_info *fi)
+{
+ struct wimlib_fd *fd = (struct wimlib_fd*)fi->fh;
+ return dentry_to_stbuf(fd->dentry, stbuf);
+}
+
static int wimfs_ftruncate(const char *path, off_t size,
struct fuse_file_info *fi)
{
struct dentry *dentry = get_dentry(w, path);
if (!dentry)
return -ENOENT;
- dentry_to_stbuf(dentry, stbuf, w->lookup_table);
+ return dentry_to_stbuf(dentry, stbuf);
+}
+
+static int wimfs_getxattr(const char *path, const char *name, char *value,
+ size_t size)
+{
+ /* XXX */
+ return -ENOTSUP;
+}
+
+/* Create a hard link */
+static int wimfs_link(const char *to, const char *from)
+{
+ struct dentry *to_dentry, *from_dentry, *from_dentry_parent;
+ const char *link_name;
+
+ to_dentry = get_dentry(w, to);
+ if (!to_dentry)
+ return -ENOENT;
+ if (!dentry_is_regular_file(to_dentry))
+ return -EPERM;
+
+ from_dentry_parent = get_parent_dentry(w, from);
+ if (!from_dentry_parent)
+ return -ENOENT;
+ 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))
+ return -EEXIST;
+ from_dentry = clone_dentry(to_dentry);
+ if (!from_dentry)
+ return -ENOMEM;
+ if (change_dentry_name(from_dentry, link_name) != 0) {
+ FREE(from_dentry);
+ return -ENOMEM;
+ }
+ list_add(&from_dentry->link_group_list, &to_dentry->link_group_list);
+ link_dentry(from_dentry, from_dentry_parent);
+ dentry_increment_lookup_table_refcnts(from_dentry, w->lookup_table);
+ from_dentry->link_group_master_status = GROUP_SLAVE;
return 0;
}
+static int wimfs_listxattr(const char *path, char *list, size_t size)
+{
+ /* XXX */
+ return -ENOTSUP;
+}
+
/*
* Create a directory in the WIM.
* @mode is currently ignored.
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(basename);
+ if (!dentry)
+ return -ENOMEM;
+ dentry->hard_link = next_link_group_id++;
link_dentry(dentry, parent);
}
return 0;
u8 *dentry_hash;
int ret;
struct wimlib_fd *fd;
+ unsigned stream_idx;
ret = lookup_resource(w, path, get_lookup_flags(), &dentry, <e,
- &dentry_hash);
+ &stream_idx);
if (ret != 0)
return ret;
return 0;
}
- ret = extract_resource_to_staging_dir(dentry, <e,
- lte->resource_entry.original_size);
+ ret = extract_resource_to_staging_dir(dentry, stream_idx,
+ <e, 0);
if (ret != 0)
return ret;
}
* but we need to extract the resource to the staging directory
* if we are opening it writable. */
if (flags_writable(fi->flags) && !lte->staging_file_name) {
- ret = extract_resource_to_staging_dir(dentry, <e,
+ ret = extract_resource_to_staging_dir(dentry, stream_idx, <e,
lte->resource_entry.original_size);
if (ret != 0)
return ret;
struct dentry *dentry;
dentry = get_dentry(w, path);
- if (!dentry || !dentry_is_directory(dentry))
+ if (!dentry)
+ return -ENOENT;
+ if (!dentry_is_directory(dentry))
return -ENOTDIR;
+ dentry->num_times_opened++;
fi->fh = (uint64_t)dentry;
return 0;
}
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 -errno;
wimlib_assert(!(mount_flags & WIMLIB_MOUNT_FLAG_READWRITE));
return 0;
}
+
+ if (flags_writable(fi->flags) && fd->dentry) {
+ u64 now = get_timestamp();
+ fd->dentry->last_access_time = now;
+ fd->dentry->last_write_time = now;
+ }
+
return close_wimlib_fd(fd);
}
+static int wimfs_releasedir(const char *path, struct fuse_file_info *fi)
+{
+ struct dentry *dentry = (struct dentry *)fi->fh;
+
+ wimlib_assert(dentry->num_times_opened);
+ if (--dentry->num_times_opened == 0)
+ free_dentry(dentry);
+ return 0;
+}
+
+static int wimfs_removexattr(const char *path, const char *name)
+{
+ /* XXX */
+ return -ENOTSUP;
+}
+
/* Renames a file or directory. See rename (3) */
static int wimfs_rename(const char *from, const char *to)
{
struct dentry *src;
struct dentry *dst;
struct dentry *parent_of_dst;
+ char *file_name_utf16 = NULL, *file_name_utf8 = NULL;
+ u16 file_name_utf16_len, file_name_utf8_len;
+ int ret;
+
+ /* This rename() implementation currently only supports actual files
+ * (not alternate data streams) */
src = get_dentry(w, from);
if (!src)
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));
+ if (ret != 0)
+ return -ENOMEM;
+
if (dst) {
+ if (src == dst) /* Same file */
+ return 0;
+
if (!dentry_is_directory(src)) {
/* Cannot rename non-directory to directory. */
if (dentry_is_directory(dst))
return -ENOTEMPTY;
}
parent_of_dst = dst->parent;
- unlink_dentry(dst);
- lookup_table_decrement_refcnt(w->lookup_table, dst->hash);
- free_dentry(dst);
+ remove_dentry(dst, w->lookup_table);
} else {
parent_of_dst = get_parent_dentry(w, to);
if (!parent_of_dst)
return -ENOENT;
}
+ FREE(src->file_name);
+ FREE(src->file_name_utf8);
+ src->file_name = file_name_utf16;
+ src->file_name_utf8 = file_name_utf8;
+ src->file_name_len = file_name_utf16_len;
+ src->file_name_utf8_len = file_name_utf8_len;
+
unlink_dentry(src);
- change_dentry_name(src, path_basename(to));
link_dentry(src, parent_of_dst);
- /*calculate_dentry_full_path(src);*/
return 0;
}
return -ENOTEMPTY;
unlink_dentry(dentry);
- free_dentry(dentry);
+ if (dentry->num_times_opened == 0)
+ free_dentry(dentry);
return 0;
}
+static int wimfs_setxattr(const char *path, const char *name,
+ const char *value, size_t size, int flags)
+{
+ /* XXX */
+ return -ENOTSUP;
+}
+
+static int wimfs_symlink(const char *to, const char *from)
+{
+ struct dentry *dentry_parent, *dentry;
+ const char *link_name;
+ struct lookup_table_entry *lte;
+
+ dentry_parent = get_parent_dentry(w, 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(link_name);
+ if (!dentry)
+ return -ENOMEM;
+
+ dentry->attributes = FILE_ATTRIBUTE_REPARSE_POINT;
+ dentry->reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
+
+ if (dentry_set_symlink(dentry, to, w->lookup_table, <e) != 0)
+ goto out_free_dentry;
+
+ dentry->ads_entries[1].lte_group_list.type = STREAM_TYPE_ADS;
+ list_add(&dentry->ads_entries[1].lte_group_list.list,
+ <e->lte_group_list);
+ dentry->ads_entries[1].lte = lte;
+
+ link_dentry(dentry, dentry_parent);
+ return 0;
+out_free_dentry:
+ free_dentry(dentry);
+ return -ENOMEM;
+}
+
/* Reduce the size of a file */
static int wimfs_truncate(const char *path, off_t size)
struct dentry *dentry;
struct lookup_table_entry *lte;
int ret;
- u8 *dentry_hash;
+ unsigned stream_idx;
ret = lookup_resource(w, path, get_lookup_flags(), &dentry,
- <e, &dentry_hash);
+ <e, &stream_idx);
if (ret != 0)
return ret;
} else {
/* File in WIM. Extract it to the staging directory, but only
* the first @size bytes of it. */
- ret = extract_resource_to_staging_dir(dentry, <e, size);
+ ret = extract_resource_to_staging_dir(dentry, stream_idx,
+ <e, size);
}
dentry_update_all_timestamps(dentry);
return ret;
struct lookup_table_entry *lte;
int ret;
u8 *dentry_hash;
+ unsigned stream_idx;
ret = lookup_resource(w, path, get_lookup_flags(), &dentry,
- <e, &dentry_hash);
+ <e, &stream_idx);
if (ret != 0)
return ret;
- if (lte && lte->staging_file_name)
- if (unlink(lte->staging_file_name) != 0)
- return -errno;
-
- if (dentry_hash == dentry->hash) {
+ if (stream_idx == 0) {
/* We are removing the full dentry including all alternate data
* streams. */
- const u8 *hash = dentry->hash;
- u16 i = 0;
- while (1) {
- lookup_table_decrement_refcnt(w->lookup_table, hash);
- if (i == dentry->num_ads)
- break;
- hash = dentry->ads_entries[i].hash;
- i++;
- }
-
- unlink_dentry(dentry);
- free_dentry(dentry);
+ remove_dentry(dentry, w->lookup_table);
} else {
/* We are removing an alternate data stream. */
- struct ads_entry *cur_entry = dentry->ads_entries;
- while (cur_entry->hash != dentry_hash)
- cur_entry++;
- lookup_table_decrement_refcnt(w->lookup_table, cur_entry->hash);
+ struct ads_entry *ads_entry;
- dentry_remove_ads(dentry, cur_entry);
+ ads_entry = &dentry->ads_entries[stream_idx - 1];
+ lte_decrement_refcnt(lte, w->lookup_table);
+ list_del(&ads_entry->lte_group_list.list);
+ dentry_remove_ads(dentry, ads_entry);
}
/* Beware: The lookup table entry(s) may still be referenced by users
* that have opened the corresponding streams. They are freed later in
wimlib_assert(fd->lte->staging_file_name);
wimlib_assert(fd->staging_fd != -1);
+ /* Seek to the requested position */
+ if (lseek(fd->staging_fd, offset, SEEK_SET) == -1)
+ return -errno;
+
/* Write the data. */
ret = write(fd->staging_fd, buf, size);
if (ret == -1)
return -errno;
- /* The file has been modified, so all its timestamps must be
- * updated. */
- dentry_update_all_timestamps(fd->dentry);
-
return ret;
}
-static struct fuse_operations wimfs_oper = {
- .access = wimfs_access,
- .destroy = wimfs_destroy,
- .ftruncate = wimfs_ftruncate,
- .getattr = wimfs_getattr,
- .mkdir = wimfs_mkdir,
- .mknod = wimfs_mknod,
- .open = wimfs_open,
- .opendir = wimfs_opendir,
- .read = wimfs_read,
- .readdir = wimfs_readdir,
- .readlink = wimfs_readlink,
- .release = wimfs_release,
- .rename = wimfs_rename,
- .rmdir = wimfs_rmdir,
- .truncate = wimfs_truncate,
- .unlink = wimfs_unlink,
- .utimens = wimfs_utimens,
- .write = wimfs_write,
+static struct fuse_operations wimfs_operations = {
+ .access = wimfs_access,
+ .destroy = wimfs_destroy,
+ .fallocate = wimfs_fallocate,
+ .fgetattr = wimfs_fgetattr,
+ .ftruncate = wimfs_ftruncate,
+ .getattr = wimfs_getattr,
+ .getxattr = wimfs_getxattr,
+ .link = wimfs_link,
+ .listxattr = wimfs_listxattr,
+ .mkdir = wimfs_mkdir,
+ .mknod = wimfs_mknod,
+ .open = wimfs_open,
+ .opendir = wimfs_opendir,
+ .read = wimfs_read,
+ .readdir = wimfs_readdir,
+ .readlink = wimfs_readlink,
+ .release = wimfs_release,
+ .releasedir = wimfs_releasedir,
+ .removexattr = wimfs_removexattr,
+ .rename = wimfs_rename,
+ .rmdir = wimfs_rmdir,
+ .setxattr = wimfs_setxattr,
+ .symlink = wimfs_symlink,
+ .truncate = wimfs_truncate,
+ .unlink = wimfs_unlink,
+ .utimens = wimfs_utimens,
+ .write = wimfs_write,
};
int flags)
{
int argc = 0;
- char *argv[6];
+ char *argv[16];
int ret;
char *p;
if (ret != 0)
return ret;
+ DEBUG("Selected image %d", image);
+
+ next_link_group_id = assign_link_groups(wim->image_metadata[image - 1].lgt);
+
+ resolve_lookup_table_entries(wim_root_dentry(wim), w->lookup_table);
+
if (flags & WIMLIB_MOUNT_FLAG_READWRITE)
wim_get_current_image_metadata(wim)->modified = true;
if (flags & WIMLIB_MOUNT_FLAG_DEBUG) {
argv[argc++] = "-d";
}
- if (!(flags & WIMLIB_MOUNT_FLAG_READWRITE)) {
- argv[argc++] = "-o";
- argv[argc++] = "ro";
- } else {
+ char optstring[256] = "use_ino";
+ argv[argc++] = "-o";
+ argv[argc++] = optstring;
+ if ((flags & WIMLIB_MOUNT_FLAG_READWRITE)) {
make_staging_dir();
if (!staging_dir_name) {
FREE(p);
return WIMLIB_ERR_MKDIR;
}
+ } else {
+ strcat(optstring, ",ro");
}
+ argv[argc] = NULL;
#ifdef ENABLE_DEBUG
{
w = wim;
mount_flags = flags;
- ret = fuse_main(argc, argv, &wimfs_oper, NULL);
+ ret = fuse_main(argc, argv, &wimfs_operations, NULL);
return (ret == 0) ? 0 : WIMLIB_ERR_FUSE;
}
git://wimlib.net / wimlib / blobdiff