/* 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;
+
static inline int get_lookup_flags()
{
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++;
+ }
+}
+
/* Creates a new staging file and returns its file descriptor opened for
* writing.
*
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
wimlib_assert(old_lte->refcnt > link_group_size);
new_lte = new_lookup_table_entry();
- if (!new_lte)
- return -ENOMEM;
+ if (!new_lte) {
+ ret = -ENOMEM;
+ goto out_delete_staging_file;
+ }
u16 num_transferred_fds = 0;
for (u16 i = 0; i < old_lte->num_allocated_fds; i++) {
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_lookup_table_entry(new_lte);
- return -ENOMEM;
+ FREE(new_lte);
+ ret = -ENOMEM;
+ goto out_delete_staging_file;
}
- u16 j = 0;
- for (u16 i = 0; i < old_lte->num_allocated_fds; i++) {
+ for (u16 i = 0, j = 0; ; i++) {
if (old_lte->fds[i] &&
old_lte->fds[i]->dentry->hard_link ==
dentry->hard_link)
fd->lte = new_lte;
fd->idx = j;
new_lte->fds[j] = fd;
+ if (++j == num_transferred_fds)
+ break;
}
}
old_lte->refcnt -= link_group_size;
- old_lte->num_opened_fds -= j;
- new_lte->num_opened_fds = j;
-
+ old_lte->num_opened_fds -= num_transferred_fds;
+ new_lte->num_opened_fds = num_transferred_fds;
+ new_lte->num_allocated_fds = num_transferred_fds;
}
+ } else {
+ new_lte = new_lookup_table_entry();
+ if (!new_lte) {
+ ret = -ENOMEM;
+ goto out_delete_staging_file;
+ }
}
new_lte->resource_entry.original_size = size;
new_lte->refcnt = link_group_size;
lookup_table_insert(w->lookup_table, new_lte);
*lte = new_lte;
return 0;
+out_delete_staging_file:
+ unlink(staging_file_name);
+ FREE(staging_file_name);
+ return ret;
}
/*
struct fuse_file_info *fi)
{
struct wimlib_fd *fd = (struct wimlib_fd*)fi->fh;
- dentry_to_stbuf(fd->dentry, stbuf, w->lookup_table);
- return 0;
+ return dentry_to_stbuf(fd->dentry, stbuf, w->lookup_table);
}
static int wimfs_ftruncate(const char *path, off_t size,
struct dentry *dentry = get_dentry(w, path);
if (!dentry)
return -ENOENT;
- dentry_to_stbuf(dentry, stbuf, w->lookup_table);
- return 0;
+ return dentry_to_stbuf(dentry, stbuf, w->lookup_table);
}
/* Create a hard link */
}
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;
}
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;
return 0;
}
- ret = extract_resource_to_staging_dir(dentry, <e,
- lte->resource_entry.original_size);
+ ret = extract_resource_to_staging_dir(dentry, <e, 0);
if (ret != 0)
return ret;
+ memcpy(dentry_hash, lte->hash, WIM_HASH_SIZE);
}
ret = alloc_wimlib_fd(lte, &fd);
lte->resource_entry.original_size);
if (ret != 0)
return ret;
+ memcpy(dentry_hash, lte->hash, WIM_HASH_SIZE);
}
if (lte->staging_file_name) {
fd->staging_fd = open(lte->staging_file_name, fi->flags);
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;
+}
+
/* 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;
}
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) {
/* 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;
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_operations = {
- .access = wimfs_access,
- .destroy = wimfs_destroy,
- .fgetattr = wimfs_fgetattr,
- .ftruncate = wimfs_ftruncate,
- .getattr = wimfs_getattr,
- .link = wimfs_link,
- .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,
- .symlink = wimfs_symlink,
- .truncate = wimfs_truncate,
- .unlink = wimfs_unlink,
- .utimens = wimfs_utimens,
- .write = wimfs_write,
+ .access = wimfs_access,
+ .destroy = wimfs_destroy,
+ .fgetattr = wimfs_fgetattr,
+ .ftruncate = wimfs_ftruncate,
+ .getattr = wimfs_getattr,
+ .link = wimfs_link,
+ .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,
+ .rename = wimfs_rename,
+ .rmdir = wimfs_rmdir,
+ .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);
+
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
{
git://wimlib.net / wimlib / blobdiff