return open_flags & (O_RDWR | O_WRONLY);
}
+/* Like pread(), but keep trying until everything has been read or we know for
+ * sure that there was an error. */
+static ssize_t
+full_pread(int fd, void *buf, size_t count, off_t offset)
+{
+ ssize_t bytes_remaining = count;
+ ssize_t bytes_read;
+
+ while (bytes_remaining > 0) {
+ bytes_read = pread(fd, buf, bytes_remaining, offset);
+ if (bytes_read <= 0) {
+ if (bytes_read < 0) {
+ if (errno == EINTR)
+ continue;
+ } else {
+ errno = EIO;
+ }
+ break;
+ }
+ bytes_remaining -= bytes_read;
+ buf += bytes_read;
+ offset += bytes_read;
+ }
+ return count - bytes_remaining;
+}
+
+/* Like pwrite(), but keep trying until everything has been written or we know
+ * for sure that there was an error. */
+static ssize_t
+full_pwrite(int fd, const void *buf, size_t count, off_t offset)
+{
+ ssize_t bytes_remaining = count;
+ ssize_t bytes_written;
+
+ while (bytes_remaining > 0) {
+ bytes_written = pwrite(fd, buf, bytes_remaining, offset);
+ if (bytes_written < 0) {
+ if (errno == EINTR)
+ continue;
+ break;
+ }
+ bytes_remaining -= bytes_written;
+ buf += bytes_written;
+ offset += bytes_written;
+ }
+ return count - bytes_remaining;
+}
+
/*
* Allocate a file descriptor for a stream.
*
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.
*
if (inode_set_unix_data(new->d_inode,
fuse_ctx->uid,
fuse_ctx->gid,
- mode & ~fuse_ctx->umask,
+ fuse_mask_mode(mode, fuse_ctx),
wimfs_ctx->wim->lookup_table,
UNIX_DATA_ALL | UNIX_DATA_CREATE))
{
}
}
- 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;
-
- struct wim_lookup_table_entry **my_ptr;
+ new_lte->refcnt = inode->i_nlink;
+ new_lte->resource_location = RESOURCE_IN_STAGING_FILE;
+ new_lte->staging_file_name = staging_file_name;
+ new_lte->resource_entry.original_size = size;
- if (stream_id == 0) {
- my_ptr = &inode->i_lte;
- } else {
- for (u16 i = 0; ; i++) {
- wimlib_assert(i < inode->i_num_ads);
- if (inode->i_ads_entries[i].stream_id == stream_id) {
- my_ptr = &inode->i_ads_entries[i].lte;
- break;
- }
- }
- }
-
- lookup_table_insert_unhashed(ctx->wim->lookup_table, new_lte, my_ptr);
+ lookup_table_insert_unhashed(ctx->wim->lookup_table, new_lte,
+ inode, stream_id);
+ *retrieve_lte_pointer(new_lte) = new_lte;
*lte = new_lte;
return 0;
out_revert_fd_changes:
wimlib_progress_func_t progress_func)
{
int ret;
- struct wim_lookup_table_entry *lte;
+ struct wim_lookup_table_entry *lte, *tmp;
WIMStruct *w = ctx->wim;
struct wim_image_metadata *imd = wim_get_current_image_metadata(ctx->wim);
DEBUG("Closing all staging file descriptors.");
- image_for_each_unhashed_stream(lte, imd) {
- ret = inode_close_fds(lte->lte_inode);
+ 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");
- image_for_each_unhashed_stream(lte, imd) {
+ image_for_each_unhashed_stream_safe(lte, tmp, imd) {
+ wimlib_assert(lte->unhashed);
if (wim_resource_size(lte) == 0) {
- *lte->my_ptr = NULL;
+ struct wim_lookup_table_entry **back_ptr;
+ back_ptr = retrieve_lte_pointer(lte);
+ *back_ptr = NULL;
+ list_del(<e->unhashed_list);
free_lookup_table_entry(lte);
}
}
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)
{
}
}
-#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)
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, <e, &stream_idx);
- if (ret != 0)
+ 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
u64 size = (lte) ? wim_resource_size(lte) : 0;
ret = extract_resource_to_staging_dir(inode, stream_id,
<e, 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)
+ if (ret)
return ret;
if (lte && lte->resource_location == RESOURCE_IN_STAGING_FILE) {
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 (fd->f_lte)
+ res_size = wim_resource_size(fd->f_lte);
+ else
+ res_size = 0;
+
if (offset > res_size)
return -EOVERFLOW;
- size = min(size, INT_MAX);
+
size = min(size, res_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 = full_pread(fd->staging_fd, buf, size, offset);
+ if (ret != size)
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;
+ else
+ ret = size;
break;
case RESOURCE_IN_ATTACHED_BUFFER:
memcpy(buf, fd->f_lte->attached_buffer + offset, size);
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 -ENAMETOOLONG;
+ ret = wim_inode_readlink(inode, buf, buf_len - 1);
+ 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;
}
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;
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) {
ret = truncate(lte->staging_file_name, size);
- if (ret != 0)
+ if (ret)
ret = -errno;
+ else
+ lte->resource_entry.original_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,
<e, size, ctx);
+ *back_ptr = lte;
}
- if (ret == 0)
- lte->resource_entry.original_size = size;
return ret;
}
wimlib_assert(fd->f_inode != NULL);
/* Write the data. */
- ret = pwrite(fd->staging_fd, buf, size, offset);
- if (ret == -1)
+ ret = full_pwrite(fd->staging_fd, buf, size, offset);
+ if (ret != size)
return -errno;
/* Update file size */
- if (offset + size > fd->f_lte->resource_entry.original_size)
+ if (offset + size > fd->f_lte->resource_entry.original_size) {
+ DEBUG("Update file size %"PRIu64 " => %"PRIu64"",
+ fd->f_lte->resource_entry.original_size,
+ offset + size);
fd->f_lte->resource_entry.original_size = offset + size;
+ }
/* Update timestamps */
touch_inode(fd->f_inode);
}
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,
goto out;
}
+ ret = wim_checksum_unhashed_streams(wim);
+ if (ret)
+ goto out;
+
ret = select_wim_image(wim, image);
if (ret)
goto out;
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;
ctx.image_inode_list = &imd->inode_list;
ctx.default_uid = getuid();
ctx.default_gid = getgid();
+ wimlib_assert(list_empty(&imd->unhashed_streams));
ctx.wim->lookup_table->unhashed_streams = &imd->unhashed_streams;
if (mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS)
ctx.default_lookup_flags = LOOKUP_FLAG_ADS_OK;
#endif
/* Mark dentry tree as modified if read-write mount. */
- if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE) {
+ if (mount_flags & WIMLIB_MOUNT_FLAG_READWRITE)
imd->modified = 1;
- imd->has_been_mounted_rw = 1;
- }
/* Resolve the lookup table entries for every inode in the image, and
* assign inode numbers */