* along with wimlib; if not, see http://www.gnu.org/licenses/.
*/
-#include "wimlib_internal.h"
-#include "lookup_table.h"
-#include "xml.h"
-#include "buffer_io.h"
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "wimlib.h"
+#include "wimlib/error.h"
+#include "wimlib/list.h"
+#include "wimlib/lookup_table.h"
+#include "wimlib/metadata.h"
+#include "wimlib/resource.h"
+#include "wimlib/wim.h"
+#include "wimlib/write.h"
+
+#ifdef HAVE_ALLOCA_H
+# include <alloca.h>
+#else
+# include <stdlib.h>
+#endif
+
+struct swm_part_info {
+ struct list_head stream_list;
+ u64 size;
+};
-struct split_args {
- WIMStruct *w;
- tchar *swm_base_name;
- size_t swm_base_name_len;
- const tchar *swm_suffix;
- struct list_head lte_list;
- int cur_part_number;
- int write_flags;
- long size_remaining;
- size_t part_size;
- wimlib_progress_func_t progress_func;
- union wimlib_progress_info progress;
+static void
+copy_part_info(struct swm_part_info *dst, struct swm_part_info *src)
+{
+ list_transfer(&src->stream_list, &dst->stream_list);
+ dst->size = src->size;
+}
+
+struct swm_info {
+ struct swm_part_info *parts;
+ unsigned num_parts;
+ unsigned num_alloc_parts;
+ u64 total_bytes;
+ u64 max_part_size;
};
static int
-finish_swm(WIMStruct *w, struct list_head *lte_list,
- int write_flags, wimlib_progress_func_t progress_func)
+write_split_wim(WIMStruct *orig_wim, const tchar *swm_name,
+ struct swm_info *swm_info, int write_flags,
+ wimlib_progress_func_t progress_func)
{
- off_t lookup_table_offset = ftello(w->out_fp);
+ size_t swm_name_len;
+ tchar *swm_name_buf;
+ const tchar *dot;
+ tchar *swm_suffix;
+ size_t swm_base_name_len;
+
+ union wimlib_progress_info progress;
+ unsigned part_number;
int ret;
- struct wim_lookup_table_entry *lte;
+ u8 guid[WIMLIB_GUID_LEN];
- list_for_each_entry(lte, lte_list, swm_stream_list) {
- ret = write_lookup_table_entry(lte, w->out_fp);
- if (ret)
- return ret;
+ swm_name_len = tstrlen(swm_name);
+ swm_name_buf = alloca((swm_name_len + 20) * sizeof(tchar));
+ tstrcpy(swm_name_buf, swm_name);
+ dot = tstrchr(swm_name_buf, T('.'));
+ if (dot) {
+ swm_base_name_len = dot - swm_name_buf;
+ swm_suffix = alloca((tstrlen(dot) + 1) * sizeof(tchar));
+ tstrcpy(swm_suffix, dot);
+ } else {
+ swm_base_name_len = swm_name_len;
+ swm_suffix = alloca(1 * sizeof(tchar));
+ swm_suffix[0] = T('\0');
}
- off_t xml_data_offset = ftello(w->out_fp);
+ progress.split.completed_bytes = 0;
+ progress.split.total_bytes = 0;
+ for (part_number = 1; part_number <= swm_info->num_parts; part_number++)
+ progress.split.total_bytes += swm_info->parts[part_number - 1].size;
+ progress.split.total_parts = swm_info->num_parts;
+ progress.split.part_name = swm_name_buf;
- if (lookup_table_offset == -1 || xml_data_offset == -1)
- return WIMLIB_ERR_WRITE;
- w->hdr.lookup_table_res_entry.offset = lookup_table_offset;
- w->hdr.lookup_table_res_entry.size =
- xml_data_offset - lookup_table_offset;
- w->hdr.lookup_table_res_entry.original_size =
- xml_data_offset - lookup_table_offset;
- w->hdr.lookup_table_res_entry.flags = WIM_RESHDR_FLAG_METADATA;
- return finish_write(w, WIMLIB_ALL_IMAGES,
- write_flags | WIMLIB_WRITE_FLAG_NO_LOOKUP_TABLE,
- progress_func);
-}
+ randomize_byte_array(guid, WIMLIB_GUID_LEN);
-static int
-copy_resource_to_swm(struct wim_lookup_table_entry *lte, void *__args)
-{
- struct split_args *args = (struct split_args*)__args;
- WIMStruct *w = args->w;
- int ret;
+ for (part_number = 1; part_number <= swm_info->num_parts; part_number++) {
+ int part_write_flags;
- /* metadata resources were already written. */
- if (lte->resource_entry.flags & WIM_RESHDR_FLAG_METADATA)
- return 0;
-
- if (args->size_remaining < 0 ||
- (u64)args->size_remaining < lte->resource_entry.size) {
+ if (part_number != 1) {
+ tsprintf(swm_name_buf + swm_base_name_len,
+ T("%u%"TS), part_number, swm_suffix);
+ }
- /* No space for this resource. Finish the previous swm and
- * start a new one. */
+ progress.split.cur_part_number = part_number;
+ if (progress_func) {
+ progress_func(WIMLIB_PROGRESS_MSG_SPLIT_BEGIN_PART,
+ &progress);
+ }
- ret = finish_swm(w, &args->lte_list, args->write_flags,
- args->progress_func);
+ part_write_flags = write_flags & WIMLIB_WRITE_MASK_PUBLIC;
+ part_write_flags |= WIMLIB_WRITE_FLAG_USE_EXISTING_TOTALBYTES;
+ if (part_number != 1)
+ part_write_flags |= WIMLIB_WRITE_FLAG_NO_METADATA;
+
+ ret = write_wim_part(orig_wim,
+ swm_name_buf,
+ WIMLIB_ALL_IMAGES,
+ part_write_flags,
+ 1,
+ NULL,
+ part_number,
+ swm_info->num_parts,
+ &swm_info->parts[part_number - 1].stream_list,
+ guid);
if (ret)
return ret;
- if (args->progress_func) {
- args->progress_func(WIMLIB_PROGRESS_MSG_SPLIT_END_PART,
- &args->progress);
+ progress.split.completed_bytes += swm_info->parts[part_number - 1].size;
+ if (progress_func) {
+ progress_func(WIMLIB_PROGRESS_MSG_SPLIT_END_PART,
+ &progress);
}
+ }
+ return 0;
+}
- INIT_LIST_HEAD(&args->lte_list);
- args->cur_part_number++;
-
- tsprintf(args->swm_base_name + args->swm_base_name_len, T("%d%"TS),
- args->cur_part_number, args->swm_suffix);
-
- w->hdr.part_number = args->cur_part_number;
-
- if (args->progress_func) {
- args->progress.split.cur_part_number = args->cur_part_number;
- args->progress_func(WIMLIB_PROGRESS_MSG_SPLIT_BEGIN_PART,
- &args->progress);
+static int
+add_stream_to_swm(struct wim_lookup_table_entry *lte, void *_swm_info)
+{
+ struct swm_info *swm_info = _swm_info;
+ u64 stream_size;
+
+ stream_size = lte->resource_entry.size;
+
+ /* - Start first part if no parts have been started so far;
+ * - Start next part if adding this stream exceeds maximum part size,
+ * UNLESS the stream is metadata or if no streams at all have been
+ * added to the current part.
+ */
+ if (swm_info->num_parts == 0 ||
+ ((swm_info->parts[swm_info->num_parts - 1].size +
+ stream_size >= swm_info->max_part_size)
+ && !((lte->resource_entry.flags & WIM_RESHDR_FLAG_METADATA) ||
+ swm_info->parts[swm_info->num_parts - 1].size == 0)))
+ {
+ if (swm_info->num_parts == swm_info->num_alloc_parts) {
+ struct swm_part_info *parts;
+ size_t num_alloc_parts = swm_info->num_alloc_parts;
+
+ num_alloc_parts += 8;
+ parts = MALLOC(num_alloc_parts * sizeof(parts[0]));
+ if (!parts)
+ return WIMLIB_ERR_NOMEM;
+
+ for (unsigned i = 0; i < swm_info->num_parts; i++)
+ copy_part_info(&parts[i], &swm_info->parts[i]);
+
+ FREE(swm_info->parts);
+ swm_info->parts = parts;
+ swm_info->num_alloc_parts = num_alloc_parts;
}
-
- ret = begin_write(w, args->swm_base_name, args->write_flags);
- if (ret)
- return ret;
- args->size_remaining = args->part_size;
+ swm_info->num_parts++;
+ INIT_LIST_HEAD(&swm_info->parts[swm_info->num_parts - 1].stream_list);
+ swm_info->parts[swm_info->num_parts - 1].size = 0;
+ }
+ swm_info->parts[swm_info->num_parts - 1].size += stream_size;
+ if (!(lte->resource_entry.flags & WIM_RESHDR_FLAG_METADATA)) {
+ list_add_tail(<e->write_streams_list,
+ &swm_info->parts[swm_info->num_parts - 1].stream_list);
}
- args->size_remaining -= lte->resource_entry.size;
- args->progress.split.completed_bytes += lte->resource_entry.size;
- list_add_tail(<e->swm_stream_list, &args->lte_list);
- return copy_resource(lte, w);
+ swm_info->total_bytes += stream_size;
+ return 0;
}
-/* Splits the WIM file @w into multiple parts prefixed by @swm_name with size at
- * most @part_size bytes. */
+/* API function documented in wimlib.h */
WIMLIBAPI int
-wimlib_split(WIMStruct *w, const tchar *swm_name,
- size_t part_size, int write_flags,
+wimlib_split(WIMStruct *wim, const tchar *swm_name,
+ u64 part_size, int write_flags,
wimlib_progress_func_t progress_func)
{
+ struct swm_info swm_info;
+ unsigned i;
int ret;
- struct wim_header hdr_save;
- struct split_args args;
- const tchar *swm_suffix;
- size_t swm_name_len;
- size_t swm_base_name_len;
- if (!swm_name || part_size == 0)
+ if (swm_name == NULL || swm_name[0] == T('\0') || part_size == 0)
return WIMLIB_ERR_INVALID_PARAM;
- if (w->hdr.total_parts != 1)
- return WIMLIB_ERR_SPLIT_UNSUPPORTED;
-
- write_flags &= WIMLIB_WRITE_MASK_PUBLIC;
-
- swm_name_len = tstrlen(swm_name);
- tchar swm_base_name[swm_name_len + 20];
-
- memcpy(&hdr_save, &w->hdr, sizeof(struct wim_header));
- w->hdr.flags |= WIM_HDR_FLAG_SPANNED;
- w->hdr.boot_idx = 0;
- randomize_byte_array(w->hdr.guid, WIM_GID_LEN);
- ret = begin_write(w, swm_name, write_flags);
- if (ret)
- goto out;
-
- tmemcpy(swm_base_name, swm_name, swm_name_len + 1);
-
- swm_suffix = tstrchr(swm_name, T('.'));
- if (swm_suffix) {
- swm_base_name_len = swm_suffix - swm_name;
- } else {
- swm_base_name_len = swm_name_len;
- swm_base_name[ARRAY_LEN(swm_base_name) - 1] = T('\0');
- swm_suffix = &swm_base_name[ARRAY_LEN(swm_base_name) - 1];
- }
-
- args.w = w;
- args.swm_base_name = swm_base_name;
- args.swm_base_name_len = swm_base_name_len;
- args.swm_suffix = swm_suffix;
- INIT_LIST_HEAD(&args.lte_list);
- args.cur_part_number = 1;
- args.write_flags = write_flags;
- args.size_remaining = part_size;
- args.part_size = part_size;
- args.progress_func = progress_func;
- args.progress.split.total_bytes = lookup_table_total_stream_size(w->lookup_table);
- args.progress.split.cur_part_number = 1;
- args.progress.split.completed_bytes = 0;
- args.progress.split.part_name = swm_base_name;
+ if (!wim_has_metadata(wim))
+ return WIMLIB_ERR_INVALID_PARAM;
- if (progress_func) {
- progress_func(WIMLIB_PROGRESS_MSG_SPLIT_BEGIN_PART,
- &args.progress);
- }
+ memset(&swm_info, 0, sizeof(swm_info));
+ swm_info.max_part_size = part_size;
- for (int i = 0; i < w->hdr.image_count; i++) {
- struct wim_lookup_table_entry *metadata_lte;
- metadata_lte = w->image_metadata[i]->metadata_lte;
- ret = copy_resource(metadata_lte, w);
+ for (i = 0; i < wim->hdr.image_count; i++) {
+ ret = add_stream_to_swm(wim->image_metadata[i]->metadata_lte,
+ &swm_info);
if (ret)
- goto out;
- args.size_remaining -= metadata_lte->resource_entry.size;
- args.progress.split.completed_bytes += metadata_lte->resource_entry.size;
- /* Careful: The metadata lookup table entries must be added in
- * order of the images. */
- list_add_tail(&metadata_lte->swm_stream_list, &args.lte_list);
+ goto out_free_swm_info;
}
- ret = for_lookup_table_entry_pos_sorted(w->lookup_table,
- copy_resource_to_swm,
- &args);
+ ret = for_lookup_table_entry_pos_sorted(wim->lookup_table,
+ add_stream_to_swm,
+ &swm_info);
if (ret)
- goto out;
-
- ret = finish_swm(w, &args.lte_list, write_flags, progress_func);
- if (ret)
- goto out;
-
- if (progress_func) {
- progress_func(WIMLIB_PROGRESS_MSG_SPLIT_END_PART,
- &args.progress);
- }
-
- /* The swms are all ready now, except the total_parts and part_number
- * fields in their headers are wrong (since we don't know the total
- * parts until they are all written). Fix them. */
- int total_parts = args.cur_part_number;
- for (int i = 1; i <= total_parts; i++) {
- const tchar *part_name;
- if (i == 1) {
- part_name = swm_name;
- } else {
- tsprintf(swm_base_name + swm_base_name_len, T("%d%"TS),
- i, swm_suffix);
- part_name = swm_base_name;
- }
+ goto out_free_swm_info;
- FILE *fp = tfopen(part_name, T("r+b"));
- if (!fp) {
- ERROR_WITH_ERRNO("Failed to open `%"TS"'", part_name);
- ret = WIMLIB_ERR_OPEN;
- goto out;
- }
- u8 buf[4];
- put_u16(&buf[0], i);
- put_u16(&buf[2], total_parts);
-
- if (fseek(fp, 40, SEEK_SET) != 0 ||
- fwrite(buf, 1, sizeof(buf), fp) != sizeof(buf) ||
- fclose(fp) != 0)
- {
- ERROR_WITH_ERRNO("Error overwriting header of `%"TS"'",
- part_name);
- ret = WIMLIB_ERR_WRITE;
- break;
- }
- }
-out:
- close_wim_writable(w);
- memcpy(&w->hdr, &hdr_save, sizeof(struct wim_header));
+ ret = write_split_wim(wim, swm_name, &swm_info, write_flags,
+ progress_func);
+out_free_swm_info:
+ FREE(swm_info.parts);
return ret;
}
git://wimlib.net / wimlib / blobdiff