#if defined(HAVE_SYS_FILE_H) && defined(HAVE_FLOCK)
/* On BSD, this should be included before "wimlib/list.h" so that "wimlib/list.h" can
- * overwrite the LIST_HEAD macro. */
+ * override the LIST_HEAD macro. */
# include <sys/file.h>
#endif
#include "wimlib/progress.h"
#include "wimlib/resource.h"
#include "wimlib/solid.h"
-#ifdef __WIN32__
-# include "wimlib/win32.h" /* win32_rename_replacement() */
-#endif
+#include "wimlib/win32.h" /* win32_rename_replacement() */
#include "wimlib/write.h"
#include "wimlib/xml.h"
write_flags = ctx->write_flags;
wim = ctx->wim;
- if (write_flags & WIMLIB_WRITE_FLAG_OVERWRITE &&
+ if (write_flags & WIMLIB_WRITE_FLAG_APPEND &&
blob->blob_location == BLOB_IN_WIM &&
blob->rdesc->wim == wim)
return 1;
return blob_filtered(blob, ctx) < 0;
}
-static inline int
+static inline bool
may_soft_filter_blobs(const struct filter_context *ctx)
{
- if (ctx == NULL)
- return 0;
- return ctx->write_flags & WIMLIB_WRITE_FLAG_OVERWRITE;
+ return ctx && (ctx->write_flags & WIMLIB_WRITE_FLAG_APPEND);
}
-static inline int
+static inline bool
may_hard_filter_blobs(const struct filter_context *ctx)
{
- if (ctx == NULL)
- return 0;
- return ctx->write_flags & WIMLIB_WRITE_FLAG_SKIP_EXTERNAL_WIMS;
+ return ctx && (ctx->write_flags & WIMLIB_WRITE_FLAG_SKIP_EXTERNAL_WIMS);
}
-static inline int
+static inline bool
may_filter_blobs(const struct filter_context *ctx)
{
return (may_soft_filter_blobs(ctx) || may_hard_filter_blobs(ctx));
}
-/* Return true if the specified resource is compressed and the compressed data
- * can be reused with the specified output parameters. */
+/* Return true if the specified blob is located in a WIM resource which can be
+ * reused in the output WIM file, without being recompressed. */
static bool
-can_raw_copy(const struct blob_descriptor *blob,
- int write_resource_flags, int out_ctype, u32 out_chunk_size)
+can_raw_copy(const struct blob_descriptor *blob, int write_resource_flags,
+ int out_ctype, u32 out_chunk_size)
{
const struct wim_resource_descriptor *rdesc;
+ /* Recompress everything if requested. */
if (write_resource_flags & WRITE_RESOURCE_FLAG_RECOMPRESS)
return false;
- if (out_ctype == WIMLIB_COMPRESSION_TYPE_NONE)
- return false;
-
+ /* A blob not located in a WIM resource cannot be reused. */
if (blob->blob_location != BLOB_IN_WIM)
return false;
rdesc = blob->rdesc;
- if (rdesc->is_pipable != !!(write_resource_flags & WRITE_RESOURCE_FLAG_PIPABLE))
+ /* In the case of an in-place compaction, always reuse resources located
+ * in the WIM being compacted. */
+ if (rdesc->wim->being_compacted)
+ return true;
+
+ /* Otherwise, only reuse compressed resources. */
+ if (out_ctype == WIMLIB_COMPRESSION_TYPE_NONE ||
+ !(rdesc->flags & (WIM_RESHDR_FLAG_COMPRESSED |
+ WIM_RESHDR_FLAG_SOLID)))
+ return false;
+
+ /* When writing a pipable WIM, we can only reuse pipable resources; and
+ * when writing a non-pipable WIM, we can only reuse non-pipable
+ * resources. */
+ if (rdesc->is_pipable !=
+ !!(write_resource_flags & WRITE_RESOURCE_FLAG_PIPABLE))
+ return false;
+
+ /* When writing a solid WIM, we can only reuse solid resources; and when
+ * writing a non-solid WIM, we can only reuse non-solid resources. */
+ if (!!(rdesc->flags & WIM_RESHDR_FLAG_SOLID) !=
+ !!(write_resource_flags & WRITE_RESOURCE_FLAG_SOLID))
return false;
+ /* Note: it is theoretically possible to copy chunks of compressed data
+ * between non-solid, solid, and pipable resources. However, we don't
+ * currently implement this optimization because it would be complex and
+ * would usually go unused. */
+
if (rdesc->flags & WIM_RESHDR_FLAG_COMPRESSED) {
- /* Normal compressed resource: Must use same compression type
- * and chunk size. */
+ /* To re-use a non-solid resource, it must use the desired
+ * compression type and chunk size. */
return (rdesc->compression_type == out_ctype &&
rdesc->chunk_size == out_chunk_size);
- }
-
- if ((rdesc->flags & WIM_RESHDR_FLAG_SOLID) &&
- (write_resource_flags & WRITE_RESOURCE_FLAG_SOLID))
- {
+ } else {
/* Solid resource: Such resources may contain multiple blobs,
* and in general only a subset of them need to be written. As
* a heuristic, re-use the raw data if more than two-thirds the
* check if they are compatible with @out_ctype and
* @out_chunk_size. */
+ /* Did we already decide to reuse the resource? */
+ if (rdesc->raw_copy_ok)
+ return true;
+
struct blob_descriptor *res_blob;
u64 write_size = 0;
return (write_size > rdesc->uncompressed_size * 2 / 3);
}
-
- return false;
}
static u32
wimlib_progress_func_t progfunc;
void *progctx;
union wimlib_progress_info progress;
- uint64_t next_progress;
+ u64 next_progress;
};
static int
if (discarded) {
progress->write_streams.total_bytes -= complete_size;
progress->write_streams.total_streams -= complete_count;
- if (progress_data->next_progress != ~(uint64_t)0 &&
+ if (progress_data->next_progress != ~(u64)0 &&
progress_data->next_progress > progress->write_streams.total_bytes)
{
progress_data->next_progress = progress->write_streams.total_bytes;
progress->write_streams.completed_streams += complete_count;
}
- if (progress->write_streams.completed_bytes >= progress_data->next_progress)
- {
+ if (progress->write_streams.completed_bytes >= progress_data->next_progress) {
+
ret = call_progress(progress_data->progfunc,
WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
progress,
if (ret)
return ret;
- if (progress_data->next_progress == progress->write_streams.total_bytes) {
- progress_data->next_progress = ~(uint64_t)0;
- } else {
- /* Handle rate-limiting of messages */
-
- /* Send new message as soon as another 1/128 of the
- * total has been written. (Arbitrary number.) */
- progress_data->next_progress =
- progress->write_streams.completed_bytes +
- progress->write_streams.total_bytes / 128;
-
- /* ... Unless that would be more than 5000000 bytes, in
- * which case send the next after the next 5000000
- * bytes. (Another arbitrary number.) */
- if (progress->write_streams.completed_bytes + 5000000 <
- progress_data->next_progress)
- progress_data->next_progress =
- progress->write_streams.completed_bytes + 5000000;
-
- /* ... But always send a message as soon as we're
- * completely done. */
- if (progress->write_streams.total_bytes <
- progress_data->next_progress)
- progress_data->next_progress =
- progress->write_streams.total_bytes;
- }
+ set_next_progress(progress->write_streams.completed_bytes,
+ progress->write_streams.total_bytes,
+ &progress_data->next_progress);
}
return 0;
}
struct filter_context *filter_ctx;
- /* Upper bound on the total number of bytes that need to be compressed.
- * */
- u64 num_bytes_to_compress;
-
/* Pointer to the chunk_compressor implementation being used for
* compressing chunks of data, or NULL if chunks are being written
* uncompressed. */
hdr.chunk_size = cpu_to_le32(ctx->out_chunk_size);
hdr.compression_format = cpu_to_le32(ctx->out_ctype);
- BUILD_BUG_ON(WIMLIB_COMPRESSION_TYPE_XPRESS != 1);
- BUILD_BUG_ON(WIMLIB_COMPRESSION_TYPE_LZX != 2);
- BUILD_BUG_ON(WIMLIB_COMPRESSION_TYPE_LZMS != 3);
+ STATIC_ASSERT(WIMLIB_COMPRESSION_TYPE_XPRESS == 1);
+ STATIC_ASSERT(WIMLIB_COMPRESSION_TYPE_LZX == 2);
+ STATIC_ASSERT(WIMLIB_COMPRESSION_TYPE_LZMS == 3);
ret = full_pwrite(ctx->out_fd, &hdr, sizeof(hdr),
chunk_table_offset - sizeof(hdr));
out_reshdr->uncompressed_size = res_uncompressed_size;
out_reshdr->size_in_wim = res_size_in_wim;
out_reshdr->offset_in_wim = res_offset_in_wim;
- DEBUG("Finished writing resource: %"PRIu64" => %"PRIu64" @ %"PRIu64"",
- res_uncompressed_size, res_size_in_wim, res_offset_in_wim);
return 0;
}
{
int ret;
struct wim_inode *inode;
+ tchar *cookie1;
+ tchar *cookie2;
if (!blob->may_send_done_with_file)
return 0;
inode = blob->file_inode;
wimlib_assert(inode != NULL);
- wimlib_assert(inode->num_remaining_streams > 0);
- if (--inode->num_remaining_streams > 0)
+ wimlib_assert(inode->i_num_remaining_streams > 0);
+ if (--inode->i_num_remaining_streams > 0)
return 0;
-#ifdef __WIN32__
- /* XXX: This logic really should be somewhere else. */
-
- /* We want the path to the file, but blob->file_on_disk might actually
- * refer to a named data stream. Temporarily strip the named data
- * stream from the path. */
- wchar_t *p_colon = NULL;
- wchar_t *p_question_mark = NULL;
- const wchar_t *p_stream_name;
-
- p_stream_name = path_stream_name(blob->file_on_disk);
- if (unlikely(p_stream_name)) {
- p_colon = (wchar_t *)(p_stream_name - 1);
- wimlib_assert(*p_colon == L':');
- *p_colon = L'\0';
- }
-
- /* We also should use a fake Win32 path instead of a NT path */
- if (!wcsncmp(blob->file_on_disk, L"\\??\\", 4)) {
- p_question_mark = &blob->file_on_disk[1];
- *p_question_mark = L'\\';
- }
-#endif
+ cookie1 = progress_get_streamless_path(blob->file_on_disk);
+ cookie2 = progress_get_win32_path(blob->file_on_disk);
ret = done_with_file(blob->file_on_disk, progfunc, progctx);
-#ifdef __WIN32__
- if (p_colon)
- *p_colon = L':';
- if (p_question_mark)
- *p_question_mark = L'?';
-#endif
+ progress_put_win32_path(cookie2);
+ progress_put_streamless_path(cookie1);
+
return ret;
}
* (and reading it again) entirely, passing its
* output reference count to the duplicate blob
* in the former case. */
- DEBUG("Discarding duplicate blob of "
- "length %"PRIu64, blob->size);
ret = do_write_blobs_progress(&ctx->progress_data,
blob->size, 1, true);
list_del(&blob->write_blobs_list);
* blob descriptor must wait until
* read_blob_list() has finished reading its
* data. */
- DEBUG("Blob duplicate, but not already "
- "selected for writing.");
list_replace(&blob->write_blobs_list,
&new_blob->write_blobs_list);
list_replace(&blob->blob_table_list,
if (filedes_seek(out_fd, begin_offset) == -1)
return 0;
- ret = extract_full_blob_to_fd(blob, out_fd);
+ ret = extract_blob_to_fd(blob, out_fd);
if (ret) {
/* Error reading the uncompressed data. */
if (out_fd->offset == begin_offset &&
wimlib_assert(out_fd->offset - begin_offset == blob->size);
- if (out_fd->offset < end_offset &&
- 0 != ftruncate(out_fd->fd, out_fd->offset))
- {
- ERROR_WITH_ERRNO("Can't truncate output file to "
- "offset %"PRIu64, out_fd->offset);
- return WIMLIB_ERR_WRITE;
- }
+ /* We could ftruncate() the file to 'out_fd->offset' here, but there
+ * isn't much point. Usually we will only be truncating by a few bytes
+ * and will just overwrite the data immediately. */
blob->out_reshdr.size_in_wim = blob->size;
blob->out_reshdr.flags &= ~(WIM_RESHDR_FLAG_COMPRESSED |
/* Starting to write a new blob in non-solid mode. */
if (ctx->write_resource_flags & WRITE_RESOURCE_FLAG_PIPABLE) {
- DEBUG("Writing pipable WIM blob header "
- "(offset=%"PRIu64")", ctx->out_fd->offset);
ret = write_pwm_blob_header(blob, ctx->out_fd,
ctx->compressor != NULL);
if (ret)
return status;
}
-/* Compute statistics about a list of blobs that will be written.
+/*
+ * Compute statistics about a list of blobs that will be written.
*
* Assumes the blobs are sorted such that all blobs located in each distinct WIM
- * (specified by WIMStruct) are together. */
-static void
+ * (specified by WIMStruct) are together.
+ *
+ * For compactions, also verify that there are no overlapping resources. This
+ * really should be checked earlier, but for now it's easiest to check here.
+ */
+static int
compute_blob_list_stats(struct list_head *blob_list,
struct write_blobs_ctx *ctx)
{
u64 num_blobs = 0;
u64 total_parts = 0;
WIMStruct *prev_wim_part = NULL;
+ const struct wim_resource_descriptor *prev_rdesc = NULL;
list_for_each_entry(blob, blob_list, write_blobs_list) {
num_blobs++;
total_bytes += blob->size;
if (blob->blob_location == BLOB_IN_WIM) {
- if (prev_wim_part != blob->rdesc->wim) {
- prev_wim_part = blob->rdesc->wim;
+ const struct wim_resource_descriptor *rdesc = blob->rdesc;
+ WIMStruct *wim = rdesc->wim;
+
+ if (prev_wim_part != wim) {
+ prev_wim_part = wim;
total_parts++;
}
+ if (unlikely(wim->being_compacted) && rdesc != prev_rdesc) {
+ if (prev_rdesc != NULL &&
+ rdesc->offset_in_wim <
+ prev_rdesc->offset_in_wim +
+ prev_rdesc->size_in_wim)
+ {
+ WARNING("WIM file contains overlapping "
+ "resources! Compaction is not "
+ "possible.");
+ return WIMLIB_ERR_RESOURCE_ORDER;
+ }
+ prev_rdesc = rdesc;
+ }
}
}
ctx->progress_data.progress.write_streams.total_bytes = total_bytes;
ctx->progress_data.progress.write_streams.total_parts = total_parts;
ctx->progress_data.progress.write_streams.completed_parts = 0;
ctx->progress_data.next_progress = 0;
+ return 0;
}
/* Find blobs in @blob_list that can be copied to the output WIM in raw form
* @raw_copy_blobs. Return the total uncompressed size of the blobs that need
* to be compressed. */
static u64
-find_raw_copy_blobs(struct list_head *blob_list,
- int write_resource_flags,
- int out_ctype,
- u32 out_chunk_size,
+find_raw_copy_blobs(struct list_head *blob_list, int write_resource_flags,
+ int out_ctype, u32 out_chunk_size,
struct list_head *raw_copy_blobs)
{
struct blob_descriptor *blob, *tmp;
- u64 num_bytes_to_compress = 0;
+ u64 num_nonraw_bytes = 0;
INIT_LIST_HEAD(raw_copy_blobs);
blob->rdesc->raw_copy_ok = 0;
list_for_each_entry_safe(blob, tmp, blob_list, write_blobs_list) {
- if (blob->blob_location == BLOB_IN_WIM &&
- blob->rdesc->raw_copy_ok)
- {
- list_move_tail(&blob->write_blobs_list,
- raw_copy_blobs);
- } else if (can_raw_copy(blob, write_resource_flags,
- out_ctype, out_chunk_size))
+ if (can_raw_copy(blob, write_resource_flags,
+ out_ctype, out_chunk_size))
{
blob->rdesc->raw_copy_ok = 1;
- list_move_tail(&blob->write_blobs_list,
- raw_copy_blobs);
+ list_move_tail(&blob->write_blobs_list, raw_copy_blobs);
} else {
- num_bytes_to_compress += blob->size;
+ num_nonraw_bytes += blob->size;
}
}
- return num_bytes_to_compress;
+ return num_nonraw_bytes;
}
/* Copy a raw compressed resource located in another WIM file to the WIM file
struct blob_descriptor *blob;
u64 out_offset_in_wim;
- DEBUG("Copying raw compressed data (size_in_wim=%"PRIu64", "
- "uncompressed_size=%"PRIu64")",
- in_rdesc->size_in_wim, in_rdesc->uncompressed_size);
-
/* Copy the raw data. */
cur_read_offset = in_rdesc->offset_in_wim;
end_read_offset = cur_read_offset + in_rdesc->size_in_wim;
}
in_fd = &in_rdesc->wim->in_fd;
wimlib_assert(cur_read_offset != end_read_offset);
- do {
- bytes_to_read = min(sizeof(buf), end_read_offset - cur_read_offset);
+ if (likely(!in_rdesc->wim->being_compacted) ||
+ in_rdesc->offset_in_wim > out_fd->offset) {
+ do {
+ bytes_to_read = min(sizeof(buf),
+ end_read_offset - cur_read_offset);
- ret = full_pread(in_fd, buf, bytes_to_read, cur_read_offset);
- if (ret)
- return ret;
+ ret = full_pread(in_fd, buf, bytes_to_read,
+ cur_read_offset);
+ if (ret)
+ return ret;
- ret = full_write(out_fd, buf, bytes_to_read);
- if (ret)
- return ret;
+ ret = full_write(out_fd, buf, bytes_to_read);
+ if (ret)
+ return ret;
+
+ cur_read_offset += bytes_to_read;
+
+ } while (cur_read_offset != end_read_offset);
+ } else {
+ /* Optimization: the WIM file is being compacted and the
+ * resource being written is already in the desired location.
+ * Skip over the data instead of re-writing it. */
- cur_read_offset += bytes_to_read;
+ /* Due the earlier check for overlapping resources, it should
+ * never be the case that we already overwrote the resource. */
+ wimlib_assert(!(in_rdesc->offset_in_wim < out_fd->offset));
- } while (cur_read_offset != end_read_offset);
+ if (-1 == filedes_seek(out_fd, out_fd->offset + in_rdesc->size_in_wim))
+ return WIMLIB_ERR_WRITE;
+ }
list_for_each_entry(blob, &in_rdesc->blob_list, rdesc_node) {
if (blob->will_be_in_output_wim) {
}
static void
-remove_empty_blobs(struct list_head *blob_list)
+validate_blob_list(struct list_head *blob_list)
{
- struct blob_descriptor *blob, *tmp;
+ struct blob_descriptor *blob;
- list_for_each_entry_safe(blob, tmp, blob_list, write_blobs_list) {
+ list_for_each_entry(blob, blob_list, write_blobs_list) {
wimlib_assert(blob->will_be_in_output_wim);
- if (blob->size == 0) {
- list_del(&blob->write_blobs_list);
- blob->out_reshdr.offset_in_wim = 0;
- blob->out_reshdr.size_in_wim = 0;
- blob->out_reshdr.uncompressed_size = 0;
- blob->out_reshdr.flags = reshdr_flags_for_blob(blob);
- }
+ wimlib_assert(blob->size != 0);
}
}
-static inline bool
-blob_is_in_file(const struct blob_descriptor *blob)
-{
- return blob->blob_location == BLOB_IN_FILE_ON_DISK
-#ifdef __WIN32__
- || blob->blob_location == BLOB_IN_WINNT_FILE_ON_DISK
- || blob->blob_location == BLOB_WIN32_ENCRYPTED
-#endif
- ;
-}
-
static void
init_done_with_file_info(struct list_head *blob_list)
{
list_for_each_entry(blob, blob_list, write_blobs_list) {
if (blob_is_in_file(blob)) {
- blob->file_inode->num_remaining_streams = 0;
+ blob->file_inode->i_num_remaining_streams = 0;
blob->may_send_done_with_file = 1;
} else {
blob->may_send_done_with_file = 0;
list_for_each_entry(blob, blob_list, write_blobs_list)
if (blob->may_send_done_with_file)
- blob->file_inode->num_remaining_streams++;
+ blob->file_inode->i_num_remaining_streams++;
}
/*
* identical to another blob already being written or one that would be filtered
* out of the output WIM using blob_filtered() with the context @filter_ctx.
* Each such duplicate blob will be removed from @blob_list, its reference count
- * transfered to the pre-existing duplicate blob, its memory freed, and will not
- * be written. Alternatively, if a blob in @blob_list is a duplicate with any
- * blob in @blob_table that has not been marked for writing or would not be
+ * transferred to the pre-existing duplicate blob, its memory freed, and will
+ * not be written. Alternatively, if a blob in @blob_list is a duplicate with
+ * any blob in @blob_table that has not been marked for writing or would not be
* hard-filtered, it is freed and the pre-existing duplicate is written instead,
* taking ownership of the reference count and slot in the @blob_table_list.
*
int ret;
struct write_blobs_ctx ctx;
struct list_head raw_copy_blobs;
+ u64 num_nonraw_bytes;
wimlib_assert((write_resource_flags &
(WRITE_RESOURCE_FLAG_SOLID |
(WRITE_RESOURCE_FLAG_SOLID |
WRITE_RESOURCE_FLAG_PIPABLE));
- remove_empty_blobs(blob_list);
+ validate_blob_list(blob_list);
- if (list_empty(blob_list)) {
- DEBUG("No blobs to write.");
+ if (list_empty(blob_list))
return 0;
- }
/* If needed, set auxiliary information so that we can detect when the
* library has finished using each external file. */
if (ret)
return ret;
- compute_blob_list_stats(blob_list, &ctx);
+ ret = compute_blob_list_stats(blob_list, &ctx);
+ if (ret)
+ return ret;
if (write_resource_flags & WRITE_RESOURCE_FLAG_SOLID_SORT) {
ret = sort_blob_list_for_solid_compression(blob_list);
ctx.progress_data.progfunc = progfunc;
ctx.progress_data.progctx = progctx;
- ctx.num_bytes_to_compress = find_raw_copy_blobs(blob_list,
- write_resource_flags,
- out_ctype,
- out_chunk_size,
- &raw_copy_blobs);
-
- DEBUG("Writing blob list "
- "(offset = %"PRIu64", write_resource_flags=0x%08x, "
- "out_ctype=%d, out_chunk_size=%u, num_threads=%u, "
- "total_bytes=%"PRIu64", num_bytes_to_compress=%"PRIu64")",
- out_fd->offset, write_resource_flags,
- out_ctype, out_chunk_size, num_threads,
- ctx.progress_data.progress.write_streams.total_bytes,
- ctx.num_bytes_to_compress);
-
- if (ctx.num_bytes_to_compress == 0) {
- DEBUG("No compression needed; skipping to raw copy!");
- goto out_write_raw_copy_resources;
- }
-
- /* Unless uncompressed output was required, allocate a chunk_compressor
- * to do compression. There are serial and parallel implementations of
- * the chunk_compressor interface. We default to parallel using the
+ num_nonraw_bytes = find_raw_copy_blobs(blob_list, write_resource_flags,
+ out_ctype, out_chunk_size,
+ &raw_copy_blobs);
+
+ /* Unless no data needs to be compressed, allocate a chunk_compressor to
+ * do compression. There are serial and parallel implementations of the
+ * chunk_compressor interface. We default to parallel using the
* specified number of threads, unless the upper bound on the number
* bytes needing to be compressed is less than a heuristic value. */
- if (out_ctype != WIMLIB_COMPRESSION_TYPE_NONE) {
-
+ if (num_nonraw_bytes != 0 && out_ctype != WIMLIB_COMPRESSION_TYPE_NONE) {
#ifdef ENABLE_MULTITHREADED_COMPRESSION
- if (ctx.num_bytes_to_compress > max(2000000, out_chunk_size)) {
+ if (num_nonraw_bytes > max(2000000, out_chunk_size)) {
ret = new_parallel_chunk_compressor(out_ctype,
out_chunk_size,
num_threads, 0,
else
ctx.progress_data.progress.write_streams.num_threads = 1;
- DEBUG("Actually using %u threads",
- ctx.progress_data.progress.write_streams.num_threads);
-
- INIT_LIST_HEAD(&ctx.blobs_being_compressed);
- INIT_LIST_HEAD(&ctx.blobs_in_solid_resource);
-
ret = call_progress(ctx.progress_data.progfunc,
WIMLIB_PROGRESS_MSG_WRITE_STREAMS,
&ctx.progress_data.progress,
if (ret)
goto out_destroy_context;
+ /* Copy any compressed resources for which the raw data can be reused
+ * without decompression. */
+ ret = write_raw_copy_resources(&raw_copy_blobs, ctx.out_fd,
+ &ctx.progress_data);
+
+ if (ret || num_nonraw_bytes == 0)
+ goto out_destroy_context;
+
+ INIT_LIST_HEAD(&ctx.blobs_being_compressed);
+
if (write_resource_flags & WRITE_RESOURCE_FLAG_SOLID) {
- ret = begin_write_resource(&ctx, ctx.num_bytes_to_compress);
+
+ INIT_LIST_HEAD(&ctx.blobs_in_solid_resource);
+
+ ret = begin_write_resource(&ctx, num_nonraw_bytes);
if (ret)
goto out_destroy_context;
}
/* Read the list of blobs needing to be compressed, using the specified
* callbacks to execute processing of the data. */
- struct read_blob_list_callbacks cbs = {
- .begin_blob = write_blob_begin_read,
- .begin_blob_ctx = &ctx,
- .consume_chunk = write_blob_process_chunk,
- .consume_chunk_ctx = &ctx,
- .end_blob = write_blob_end_read,
- .end_blob_ctx = &ctx,
+ struct read_blob_callbacks cbs = {
+ .begin_blob = write_blob_begin_read,
+ .consume_chunk = write_blob_process_chunk,
+ .end_blob = write_blob_end_read,
+ .ctx = &ctx,
};
ret = read_blob_list(blob_list,
if (ret)
goto out_destroy_context;
- DEBUG("Ending solid resource: %lu %lu %lu.",
- reshdr.offset_in_wim,
- reshdr.size_in_wim,
- reshdr.uncompressed_size);
-
offset_in_res = 0;
list_for_each_entry(blob, &ctx.blobs_in_solid_resource, write_blobs_list) {
blob->out_reshdr.size_in_wim = blob->size;
wimlib_assert(offset_in_res == reshdr.uncompressed_size);
}
-out_write_raw_copy_resources:
- /* Copy any compressed resources for which the raw data can be reused
- * without decompression. */
- ret = write_raw_copy_resources(&raw_copy_blobs, ctx.out_fd,
- &ctx.progress_data);
-
out_destroy_context:
FREE(ctx.chunk_csizes);
if (ctx.compressor)
ctx.compressor->destroy(ctx.compressor);
- DEBUG("Done (ret=%d)", ret);
return ret;
}
write_resource_flags = write_flags_to_resource_flags(write_flags);
- /* wimlib v1.7.0: create a solid WIM file by default if the WIM version
- * has been set to WIM_VERSION_SOLID and at least one blob in the WIM's
- * blob table is located in a solid resource (may be the same WIM, or a
- * different one in the case of export). */
- if (wim->hdr.wim_version == WIM_VERSION_SOLID &&
- wim_has_solid_resources(wim))
- {
- write_resource_flags |= WRITE_RESOURCE_FLAG_SOLID;
- }
-
if (write_resource_flags & WRITE_RESOURCE_FLAG_SOLID) {
out_chunk_size = wim->out_solid_chunk_size;
out_ctype = wim->out_solid_compression_type;
int ret;
struct blob_descriptor blob;
+ if (unlikely(buf_size == 0)) {
+ zero_reshdr(out_reshdr);
+ if (hash_ret)
+ copy_hash(hash_ret, zero_hash);
+ return 0;
+ }
+
blob_set_is_located_in_attached_buffer(&blob, (void *)buf, buf_size);
sha1_buffer(buf, buf_size, blob.hash);
blob.unhashed = 0;
* STREAMS_OK: For writes of all images, assume that all blobs in the blob
* table of @wim and the per-image lists of unhashed blobs should be taken
* as-is, and image metadata should not be searched for references. This
- * does not exclude filtering with OVERWRITE and SKIP_EXTERNAL_WIMS, below.
+ * does not exclude filtering with APPEND and SKIP_EXTERNAL_WIMS, below.
*
- * OVERWRITE: Blobs already present in @wim shall not be returned in
+ * APPEND: Blobs already present in @wim shall not be returned in
* @blob_list_ret.
*
* SKIP_EXTERNAL_WIMS: Blobs already present in a WIM file, but not @wim,
* the blobs in @blob_list_ret.
*
* This list will be a proper superset of @blob_list_ret if and only if
- * WIMLIB_WRITE_FLAG_OVERWRITE was specified in @write_flags and some of
- * the blobs that would otherwise need to be written were already located
- * in the WIM file.
+ * WIMLIB_WRITE_FLAG_APPEND was specified in @write_flags and some of the
+ * blobs that would otherwise need to be written were already located in
+ * the WIM file.
*
* All blobs in this list will have @out_refcnt set to the number of
* references to the blob in the output WIM. If
int end_image;
int write_resource_flags;
- if (write_flags & WIMLIB_WRITE_FLAG_NO_METADATA) {
- DEBUG("Not writing any metadata resources.");
+ if (write_flags & WIMLIB_WRITE_FLAG_NO_METADATA)
return 0;
- }
write_resource_flags = write_flags_to_resource_flags(write_flags);
write_resource_flags &= ~WRITE_RESOURCE_FLAG_SOLID;
- DEBUG("Writing metadata resources (offset=%"PRIu64")",
- wim->out_fd.offset);
-
ret = call_progress(wim->progfunc,
WIMLIB_PROGRESS_MSG_WRITE_METADATA_BEGIN,
NULL, wim->progctx);
struct wim_image_metadata *imd;
imd = wim->image_metadata[i - 1];
- /* Build a new metadata resource only if image was modified from
- * the original (or was newly added). Otherwise just copy the
- * existing one. */
- if (imd->modified) {
- DEBUG("Image %u was modified; building and writing new "
- "metadata resource", i);
+ if (is_image_dirty(imd)) {
+ /* The image was modified from the original, or was
+ * newly added, so we have to build and write a new
+ * metadata resource. */
ret = write_metadata_resource(wim, i,
write_resource_flags);
- } else if (write_flags & WIMLIB_WRITE_FLAG_OVERWRITE) {
- DEBUG("Image %u was not modified; re-using existing "
- "metadata resource.", i);
- blob_set_out_reshdr_for_reuse(imd->metadata_blob);
+ } else if (is_image_unchanged_from_wim(imd, wim) &&
+ (write_flags & (WIMLIB_WRITE_FLAG_UNSAFE_COMPACT |
+ WIMLIB_WRITE_FLAG_APPEND)))
+ {
+ /* The metadata resource is already in the WIM file.
+ * For appends, we don't need to write it at all. For
+ * compactions, we re-write existing metadata resources
+ * along with the existing file resources, not here. */
+ if (write_flags & WIMLIB_WRITE_FLAG_APPEND)
+ blob_set_out_reshdr_for_reuse(imd->metadata_blob);
ret = 0;
} else {
- DEBUG("Image %u was not modified; copying existing "
- "metadata resource.", i);
+ /* The metadata resource is in a WIM file other than the
+ * one being written to. We need to rewrite it,
+ * possibly compressed differently; but rebuilding the
+ * metadata itself isn't necessary. */
ret = write_wim_resource(imd->metadata_blob,
&wim->out_fd,
wim->out_compression_type,
static int
open_wim_writable(WIMStruct *wim, const tchar *path, int open_flags)
{
- int raw_fd;
- DEBUG("Opening \"%"TS"\" for writing.", path);
-
- raw_fd = topen(path, open_flags | O_BINARY, 0644);
+ int raw_fd = topen(path, open_flags | O_BINARY, 0644);
if (raw_fd < 0) {
ERROR_WITH_ERRNO("Failed to open \"%"TS"\" for writing", path);
return WIMLIB_ERR_OPEN;
{
int ret = 0;
- if (!(write_flags & WIMLIB_WRITE_FLAG_FILE_DESCRIPTOR)) {
- DEBUG("Closing WIM file.");
+ if (!(write_flags & WIMLIB_WRITE_FLAG_FILE_DESCRIPTOR))
if (filedes_valid(&wim->out_fd))
if (filedes_close(&wim->out_fd))
ret = WIMLIB_ERR_WRITE;
- }
filedes_invalidate(&wim->out_fd);
return ret;
}
static int
write_blob_table(WIMStruct *wim, int image, int write_flags,
- struct wim_reshdr *out_reshdr,
struct list_head *blob_table_list)
{
int ret;
/* Set output resource metadata for blobs already present in WIM. */
- if (write_flags & WIMLIB_WRITE_FLAG_OVERWRITE) {
+ if (write_flags & WIMLIB_WRITE_FLAG_APPEND) {
struct blob_descriptor *blob;
list_for_each_entry(blob, blob_table_list, blob_table_list) {
if (blob->blob_location == BLOB_IN_WIM &&
return write_blob_table_from_blob_list(blob_table_list,
&wim->out_fd,
- wim->hdr.part_number,
- out_reshdr,
+ wim->out_hdr.part_number,
+ &wim->out_hdr.blob_table_reshdr,
write_flags_to_resource_flags(write_flags));
}
/*
- * finish_write():
- *
* Finish writing a WIM file: write the blob table, xml data, and integrity
- * table, then overwrite the WIM header. By default, closes the WIM file
- * descriptor (@wim->out_fd) if successful.
- *
- * write_flags is a bitwise OR of the following:
- *
- * (public) WIMLIB_WRITE_FLAG_CHECK_INTEGRITY:
- * Include an integrity table.
- *
- * (public) WIMLIB_WRITE_FLAG_FSYNC:
- * fsync() the output file before closing it.
- *
- * (public) WIMLIB_WRITE_FLAG_PIPABLE:
- * Writing a pipable WIM, possibly to a pipe; include pipable WIM
- * blob headers before the blob table and XML data, and also write
- * the WIM header at the end instead of seeking to the beginning.
- * Can't be combined with WIMLIB_WRITE_FLAG_CHECK_INTEGRITY.
- *
- * (private) WIMLIB_WRITE_FLAG_NO_BLOB_TABLE:
- * Don't write the blob table.
- *
- * (private) WIMLIB_WRITE_FLAG_CHECKPOINT_AFTER_XML:
- * After writing the XML data but before writing the integrity
- * table, write a temporary WIM header and flush the file
- * descriptor so that the WIM is less likely to become corrupted
- * upon abrupt program termination.
- * (private) WIMLIB_WRITE_FLAG_HEADER_AT_END:
- * Instead of overwriting the WIM header at the beginning of the
- * file, simply append it to the end of the file. (Used when
- * writing to pipe.)
- * (private) WIMLIB_WRITE_FLAG_FILE_DESCRIPTOR:
- * Do not close the file descriptor @wim->out_fd on either success
- * on failure.
- * (private) WIMLIB_WRITE_FLAG_USE_EXISTING_TOTALBYTES:
- * Use the existing <TOTALBYTES> stored in the in-memory XML
- * information, rather than setting it to the offset of the XML
- * data being written.
- * (private) WIMLIB_WRITE_FLAG_OVERWRITE
- * The existing WIM file is being updated in-place. The entries
- * from its integrity table may be re-used.
+ * table, then overwrite the WIM header.
+ *
+ * The output file descriptor is closed on success, except when writing to a
+ * user-specified file descriptor (WIMLIB_WRITE_FLAG_FILE_DESCRIPTOR set).
*/
static int
finish_write(WIMStruct *wim, int image, int write_flags,
struct list_head *blob_table_list)
{
- int ret;
- off_t hdr_offset;
int write_resource_flags;
off_t old_blob_table_end = 0;
+ struct integrity_table *old_integrity_table = NULL;
off_t new_blob_table_end;
u64 xml_totalbytes;
- struct integrity_table *old_integrity_table = NULL;
-
- DEBUG("image=%d, write_flags=%08x", image, write_flags);
+ int ret;
write_resource_flags = write_flags_to_resource_flags(write_flags);
* metadata resource labeled as the "boot metadata". This entry should
* be zeroed out if there is no bootable image (boot_idx 0). Otherwise,
* it should be a copy of the resource entry for the image that is
- * marked as bootable. This is not well documented... */
- if (wim->hdr.boot_idx == 0) {
- zero_reshdr(&wim->hdr.boot_metadata_reshdr);
+ * marked as bootable. */
+ if (wim->out_hdr.boot_idx == 0) {
+ zero_reshdr(&wim->out_hdr.boot_metadata_reshdr);
} else {
- copy_reshdr(&wim->hdr.boot_metadata_reshdr,
+ copy_reshdr(&wim->out_hdr.boot_metadata_reshdr,
&wim->image_metadata[
- wim->hdr.boot_idx - 1]->metadata_blob->out_reshdr);
+ wim->out_hdr.boot_idx - 1]->metadata_blob->out_reshdr);
}
- /* If overwriting the WIM file containing an integrity table in-place,
- * we'd like to re-use the information in the old integrity table
- * instead of recalculating it. But we might overwrite the old
- * integrity table when we expand the XML data. Read it into memory
- * just in case. */
- if ((write_flags & (WIMLIB_WRITE_FLAG_OVERWRITE |
+ /* If appending to a WIM file containing an integrity table, we'd like
+ * to re-use the information in the old integrity table instead of
+ * recalculating it. But we might overwrite the old integrity table
+ * when we expand the XML data. Read it into memory just in case. */
+ if ((write_flags & (WIMLIB_WRITE_FLAG_APPEND |
WIMLIB_WRITE_FLAG_CHECK_INTEGRITY)) ==
- (WIMLIB_WRITE_FLAG_OVERWRITE |
+ (WIMLIB_WRITE_FLAG_APPEND |
WIMLIB_WRITE_FLAG_CHECK_INTEGRITY)
&& wim_has_integrity_table(wim))
{
* ignoring of the return value. */
}
- /* Write blob table. */
- if (!(write_flags & WIMLIB_WRITE_FLAG_NO_BLOB_TABLE)) {
+ /* Write blob table if needed. */
+ if (!(write_flags & WIMLIB_WRITE_FLAG_NO_NEW_BLOBS)) {
ret = write_blob_table(wim, image, write_flags,
- &wim->hdr.blob_table_reshdr,
blob_table_list);
- if (ret) {
- free_integrity_table(old_integrity_table);
- return ret;
- }
+ if (ret)
+ goto out;
}
/* Write XML data. */
if (write_flags & WIMLIB_WRITE_FLAG_USE_EXISTING_TOTALBYTES)
xml_totalbytes = WIM_TOTALBYTES_USE_EXISTING;
ret = write_wim_xml_data(wim, image, xml_totalbytes,
- &wim->hdr.xml_data_reshdr,
+ &wim->out_hdr.xml_data_reshdr,
write_resource_flags);
- if (ret) {
- free_integrity_table(old_integrity_table);
- return ret;
- }
+ if (ret)
+ goto out;
- /* Write integrity table (optional). */
- if (write_flags & WIMLIB_WRITE_FLAG_CHECK_INTEGRITY) {
- if (write_flags & WIMLIB_WRITE_FLAG_CHECKPOINT_AFTER_XML) {
+ /* Write integrity table if needed. */
+ if ((write_flags & WIMLIB_WRITE_FLAG_CHECK_INTEGRITY) &&
+ wim->out_hdr.blob_table_reshdr.offset_in_wim != 0)
+ {
+ if (write_flags & WIMLIB_WRITE_FLAG_NO_NEW_BLOBS) {
+ /* The XML data we wrote may have overwritten part of
+ * the old integrity table, so while calculating the new
+ * integrity table we should temporarily update the WIM
+ * header to remove the integrity table reference. */
struct wim_header checkpoint_hdr;
- memcpy(&checkpoint_hdr, &wim->hdr, sizeof(struct wim_header));
+ memcpy(&checkpoint_hdr, &wim->out_hdr, sizeof(struct wim_header));
zero_reshdr(&checkpoint_hdr.integrity_table_reshdr);
checkpoint_hdr.flags |= WIM_HDR_FLAG_WRITE_IN_PROGRESS;
- ret = write_wim_header_at_offset(&checkpoint_hdr,
- &wim->out_fd, 0);
- if (ret) {
- free_integrity_table(old_integrity_table);
- return ret;
- }
+ ret = write_wim_header(&checkpoint_hdr, &wim->out_fd, 0);
+ if (ret)
+ goto out;
}
- new_blob_table_end = wim->hdr.blob_table_reshdr.offset_in_wim +
- wim->hdr.blob_table_reshdr.size_in_wim;
+ new_blob_table_end = wim->out_hdr.blob_table_reshdr.offset_in_wim +
+ wim->out_hdr.blob_table_reshdr.size_in_wim;
ret = write_integrity_table(wim,
new_blob_table_end,
old_blob_table_end,
old_integrity_table);
- free_integrity_table(old_integrity_table);
if (ret)
- return ret;
+ goto out;
} else {
/* No integrity table. */
- zero_reshdr(&wim->hdr.integrity_table_reshdr);
+ zero_reshdr(&wim->out_hdr.integrity_table_reshdr);
}
/* Now that all information in the WIM header has been determined, the
* preliminary header written earlier can be overwritten, the header of
* the existing WIM file can be overwritten, or the final header can be
* written to the end of the pipable WIM. */
- wim->hdr.flags &= ~WIM_HDR_FLAG_WRITE_IN_PROGRESS;
- hdr_offset = 0;
- if (write_flags & WIMLIB_WRITE_FLAG_HEADER_AT_END)
- hdr_offset = wim->out_fd.offset;
- DEBUG("Writing new header @ %"PRIu64".", hdr_offset);
- ret = write_wim_header_at_offset(&wim->hdr, &wim->out_fd, hdr_offset);
+ wim->out_hdr.flags &= ~WIM_HDR_FLAG_WRITE_IN_PROGRESS;
+ if (write_flags & WIMLIB_WRITE_FLAG_PIPABLE)
+ ret = write_wim_header(&wim->out_hdr, &wim->out_fd, wim->out_fd.offset);
+ else
+ ret = write_wim_header(&wim->out_hdr, &wim->out_fd, 0);
if (ret)
- return ret;
+ goto out;
+
+ ret = WIMLIB_ERR_WRITE;
+ if (unlikely(write_flags & WIMLIB_WRITE_FLAG_UNSAFE_COMPACT)) {
+ /* Truncate any data the compaction freed up. */
+ if (ftruncate(wim->out_fd.fd, wim->out_fd.offset)) {
+ ERROR_WITH_ERRNO("Failed to truncate the output WIM file");
+ goto out;
+ }
+ }
/* Possibly sync file data to disk before closing. On POSIX systems, it
* is necessary to do this before using rename() to overwrite an
* the system is abruptly terminated when the metadata for the rename
* operation has been written to disk, but the new file data has not.
*/
+ ret = WIMLIB_ERR_WRITE;
if (write_flags & WIMLIB_WRITE_FLAG_FSYNC) {
- DEBUG("Syncing WIM file.");
if (fsync(wim->out_fd.fd)) {
ERROR_WITH_ERRNO("Error syncing data to WIM file");
- return WIMLIB_ERR_WRITE;
+ goto out;
}
}
+ ret = WIMLIB_ERR_WRITE;
if (close_wim_writable(wim, write_flags)) {
ERROR_WITH_ERRNO("Failed to close the output WIM file");
- return WIMLIB_ERR_WRITE;
+ goto out;
}
- return 0;
+ ret = 0;
+out:
+ free_integrity_table(old_integrity_table);
+ return ret;
}
#if defined(HAVE_SYS_FILE_H) && defined(HAVE_FLOCK)
* finish_write(). */
}
+static bool
+should_default_to_solid_compression(WIMStruct *wim, int write_flags)
+{
+ return wim->out_hdr.wim_version == WIM_VERSION_SOLID &&
+ !(write_flags & (WIMLIB_WRITE_FLAG_SOLID |
+ WIMLIB_WRITE_FLAG_PIPABLE)) &&
+ wim_has_solid_resources(wim);
+}
+
+/* Update the images' filecount/bytecount stats (in the XML info) to take into
+ * account any recent modifications. */
+static int
+update_image_stats(WIMStruct *wim)
+{
+ if (!wim_has_metadata(wim))
+ return 0;
+ for (int i = 0; i < wim->hdr.image_count; i++) {
+ struct wim_image_metadata *imd = wim->image_metadata[i];
+ if (imd->stats_outdated) {
+ int ret = xml_update_image_info(wim, i + 1);
+ if (ret)
+ return ret;
+ imd->stats_outdated = false;
+ }
+ }
+ return 0;
+}
+
/* Write a standalone WIM or split WIM (SWM) part to a new file or to a file
* descriptor. */
int
const u8 *guid)
{
int ret;
- struct wim_header hdr_save;
struct list_head blob_table_list;
- if (total_parts == 1)
- DEBUG("Writing standalone WIM.");
- else
- DEBUG("Writing split WIM part %u/%u", part_number, total_parts);
- if (image == WIMLIB_ALL_IMAGES)
- DEBUG("Including all images.");
- else
- DEBUG("Including image %d only.", image);
- if (write_flags & WIMLIB_WRITE_FLAG_FILE_DESCRIPTOR)
- DEBUG("File descriptor: %d", *(const int*)path_or_fd);
- else
- DEBUG("Path: \"%"TS"\"", (const tchar*)path_or_fd);
- DEBUG("Write flags: 0x%08x", write_flags);
-
- if (write_flags & WIMLIB_WRITE_FLAG_CHECK_INTEGRITY)
- DEBUG("\tCHECK_INTEGRITY");
-
- if (write_flags & WIMLIB_WRITE_FLAG_NO_CHECK_INTEGRITY)
- DEBUG("\tNO_CHECK_INTEGRITY");
-
- if (write_flags & WIMLIB_WRITE_FLAG_PIPABLE)
- DEBUG("\tPIPABLE");
-
- if (write_flags & WIMLIB_WRITE_FLAG_NOT_PIPABLE)
- DEBUG("\tNOT_PIPABLE");
-
- if (write_flags & WIMLIB_WRITE_FLAG_RECOMPRESS)
- DEBUG("\tRECOMPRESS");
-
- if (write_flags & WIMLIB_WRITE_FLAG_FSYNC)
- DEBUG("\tFSYNC");
-
- if (write_flags & WIMLIB_WRITE_FLAG_REBUILD)
- DEBUG("\tREBUILD");
-
- if (write_flags & WIMLIB_WRITE_FLAG_SOFT_DELETE)
- DEBUG("\tSOFT_DELETE");
-
- if (write_flags & WIMLIB_WRITE_FLAG_IGNORE_READONLY_FLAG)
- DEBUG("\tIGNORE_READONLY_FLAG");
-
- if (write_flags & WIMLIB_WRITE_FLAG_SKIP_EXTERNAL_WIMS)
- DEBUG("\tSKIP_EXTERNAL_WIMS");
-
- if (write_flags & WIMLIB_WRITE_FLAG_STREAMS_OK)
- DEBUG("\tSTREAMS_OK");
-
- if (write_flags & WIMLIB_WRITE_FLAG_RETAIN_GUID)
- DEBUG("\tRETAIN_GUID");
-
- if (write_flags & WIMLIB_WRITE_FLAG_SOLID)
- DEBUG("\tSOLID");
-
- if (write_flags & WIMLIB_WRITE_FLAG_SEND_DONE_WITH_FILE_MESSAGES)
- DEBUG("\tSEND_DONE_WITH_FILE_MESSAGES");
-
- if (write_flags & WIMLIB_WRITE_FLAG_NO_SOLID_SORT)
- DEBUG("\tNO_SOLID_SORT");
-
- if (write_flags & WIMLIB_WRITE_FLAG_FILE_DESCRIPTOR)
- DEBUG("\tFILE_DESCRIPTOR");
-
- if (write_flags & WIMLIB_WRITE_FLAG_NO_METADATA)
- DEBUG("\tNO_METADATA");
-
- if (write_flags & WIMLIB_WRITE_FLAG_USE_EXISTING_TOTALBYTES)
- DEBUG("\tUSE_EXISTING_TOTALBYTES");
-
- if (num_threads == 0)
- DEBUG("Number of threads: autodetect");
- else
- DEBUG("Number of threads: %u", num_threads);
- DEBUG("Progress function: %s", (wim->progfunc ? "yes" : "no"));
- DEBUG("Blob list: %s", (blob_list_override ? "specified" : "autodetect"));
- DEBUG("GUID: %s", (write_flags &
- WIMLIB_WRITE_FLAG_RETAIN_GUID) ? "retain"
- : guid ? "explicit" : "generate new");
-
/* Internally, this is always called with a valid part number and total
* parts. */
wimlib_assert(total_parts >= 1);
WIMLIB_WRITE_FLAG_NOT_PIPABLE))
return WIMLIB_ERR_INVALID_PARAM;
- /* Save previous header, then start initializing the new one. */
- memcpy(&hdr_save, &wim->hdr, sizeof(struct wim_header));
-
- /* Set default integrity, pipable, and solid flags. */
- if (!(write_flags & (WIMLIB_WRITE_FLAG_PIPABLE |
- WIMLIB_WRITE_FLAG_NOT_PIPABLE)))
- if (wim_is_pipable(wim)) {
- DEBUG("WIM is pipable; default to PIPABLE.");
- write_flags |= WIMLIB_WRITE_FLAG_PIPABLE;
- }
+ /* Only wimlib_overwrite() accepts UNSAFE_COMPACT. */
+ if (write_flags & WIMLIB_WRITE_FLAG_UNSAFE_COMPACT)
+ return WIMLIB_ERR_INVALID_PARAM;
+ /* Include an integrity table by default if no preference was given and
+ * the WIM already had an integrity table. */
if (!(write_flags & (WIMLIB_WRITE_FLAG_CHECK_INTEGRITY |
- WIMLIB_WRITE_FLAG_NO_CHECK_INTEGRITY)))
- if (wim_has_integrity_table(wim)) {
- DEBUG("Integrity table present; default to CHECK_INTEGRITY.");
+ WIMLIB_WRITE_FLAG_NO_CHECK_INTEGRITY))) {
+ if (wim_has_integrity_table(wim))
write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
- }
+ }
+
+ /* Write a pipable WIM by default if no preference was given and the WIM
+ * was already pipable. */
+ if (!(write_flags & (WIMLIB_WRITE_FLAG_PIPABLE |
+ WIMLIB_WRITE_FLAG_NOT_PIPABLE))) {
+ if (wim_is_pipable(wim))
+ write_flags |= WIMLIB_WRITE_FLAG_PIPABLE;
+ }
if ((write_flags & (WIMLIB_WRITE_FLAG_PIPABLE |
WIMLIB_WRITE_FLAG_SOLID))
== (WIMLIB_WRITE_FLAG_PIPABLE |
WIMLIB_WRITE_FLAG_SOLID))
{
- ERROR("Cannot specify both PIPABLE and SOLID!");
+ ERROR("Solid compression is unsupported in pipable WIMs");
return WIMLIB_ERR_INVALID_PARAM;
}
- /* Set appropriate magic number. */
+ /* Start initializing the new file header. */
+ memset(&wim->out_hdr, 0, sizeof(wim->out_hdr));
+
+ /* Set the magic number. */
if (write_flags & WIMLIB_WRITE_FLAG_PIPABLE)
- wim->hdr.magic = PWM_MAGIC;
+ wim->out_hdr.magic = PWM_MAGIC;
else
- wim->hdr.magic = WIM_MAGIC;
+ wim->out_hdr.magic = WIM_MAGIC;
- /* Set appropriate version number. */
+ /* Set the version number. */
if ((write_flags & WIMLIB_WRITE_FLAG_SOLID) ||
wim->out_compression_type == WIMLIB_COMPRESSION_TYPE_LZMS)
- wim->hdr.wim_version = WIM_VERSION_SOLID;
+ wim->out_hdr.wim_version = WIM_VERSION_SOLID;
else
- wim->hdr.wim_version = WIM_VERSION_DEFAULT;
+ wim->out_hdr.wim_version = WIM_VERSION_DEFAULT;
- /* Clear header flags that will be set automatically. */
- wim->hdr.flags &= ~(WIM_HDR_FLAG_METADATA_ONLY |
- WIM_HDR_FLAG_RESOURCE_ONLY |
- WIM_HDR_FLAG_SPANNED |
- WIM_HDR_FLAG_WRITE_IN_PROGRESS);
+ /* Default to solid compression if it is valid in the chosen WIM file
+ * format and the WIMStruct references any solid resources. This is
+ * useful when exporting an image from a solid WIM. */
+ if (should_default_to_solid_compression(wim, write_flags))
+ write_flags |= WIMLIB_WRITE_FLAG_SOLID;
- /* Set SPANNED header flag if writing part of a split WIM. */
+ /* Set the header flags. */
+ wim->out_hdr.flags = (wim->hdr.flags & (WIM_HDR_FLAG_RP_FIX |
+ WIM_HDR_FLAG_READONLY));
if (total_parts != 1)
- wim->hdr.flags |= WIM_HDR_FLAG_SPANNED;
+ wim->out_hdr.flags |= WIM_HDR_FLAG_SPANNED;
+ if (wim->out_compression_type != WIMLIB_COMPRESSION_TYPE_NONE) {
+ wim->out_hdr.flags |= WIM_HDR_FLAG_COMPRESSION;
+ switch (wim->out_compression_type) {
+ case WIMLIB_COMPRESSION_TYPE_XPRESS:
+ wim->out_hdr.flags |= WIM_HDR_FLAG_COMPRESS_XPRESS;
+ break;
+ case WIMLIB_COMPRESSION_TYPE_LZX:
+ wim->out_hdr.flags |= WIM_HDR_FLAG_COMPRESS_LZX;
+ break;
+ case WIMLIB_COMPRESSION_TYPE_LZMS:
+ wim->out_hdr.flags |= WIM_HDR_FLAG_COMPRESS_LZMS;
+ break;
+ }
+ }
- /* Set part number and total parts of split WIM. This will be 1 and 1
- * if the WIM is standalone. */
- wim->hdr.part_number = part_number;
- wim->hdr.total_parts = total_parts;
+ /* Set the chunk size. */
+ wim->out_hdr.chunk_size = wim->out_chunk_size;
- /* Set the compression type and chunk size. */
- set_wim_hdr_cflags(wim->out_compression_type, &wim->hdr);
- wim->hdr.chunk_size = wim->out_chunk_size;
+ /* Set the GUID. */
+ if (write_flags & WIMLIB_WRITE_FLAG_RETAIN_GUID)
+ guid = wim->hdr.guid;
+ if (guid)
+ copy_guid(wim->out_hdr.guid, guid);
+ else
+ generate_guid(wim->out_hdr.guid);
- /* Set GUID. */
- if (!(write_flags & WIMLIB_WRITE_FLAG_RETAIN_GUID)) {
- if (guid)
- memcpy(wim->hdr.guid, guid, WIMLIB_GUID_LEN);
- else
- randomize_byte_array(wim->hdr.guid, WIMLIB_GUID_LEN);
- }
+ /* Set the part number and total parts. */
+ wim->out_hdr.part_number = part_number;
+ wim->out_hdr.total_parts = total_parts;
- /* Clear references to resources that have not been written yet. */
- zero_reshdr(&wim->hdr.blob_table_reshdr);
- zero_reshdr(&wim->hdr.xml_data_reshdr);
- zero_reshdr(&wim->hdr.boot_metadata_reshdr);
- zero_reshdr(&wim->hdr.integrity_table_reshdr);
+ /* Set the image count. */
+ if (image == WIMLIB_ALL_IMAGES)
+ wim->out_hdr.image_count = wim->hdr.image_count;
+ else
+ wim->out_hdr.image_count = 1;
- /* Set image count and boot index correctly for single image writes. */
- if (image != WIMLIB_ALL_IMAGES) {
- wim->hdr.image_count = 1;
- if (wim->hdr.boot_idx == image)
- wim->hdr.boot_idx = 1;
- else
- wim->hdr.boot_idx = 0;
+ /* Set the boot index. */
+ wim->out_hdr.boot_idx = 0;
+ if (total_parts == 1) {
+ if (image == WIMLIB_ALL_IMAGES)
+ wim->out_hdr.boot_idx = wim->hdr.boot_idx;
+ else if (image == wim->hdr.boot_idx)
+ wim->out_hdr.boot_idx = 1;
}
- /* Split WIMs can't be bootable. */
- if (total_parts != 1)
- wim->hdr.boot_idx = 0;
+ /* Update image stats if needed. */
+ ret = update_image_stats(wim);
+ if (ret)
+ return ret;
- /* Set up output file descriptor. */
+ /* Set up the output file descriptor. */
if (write_flags & WIMLIB_WRITE_FLAG_FILE_DESCRIPTOR) {
/* File descriptor was explicitly provided. */
filedes_init(&wim->out_fd, *(const int *)path_or_fd);
/* The file descriptor is a pipe. */
ret = WIMLIB_ERR_INVALID_PARAM;
if (!(write_flags & WIMLIB_WRITE_FLAG_PIPABLE))
- goto out_restore_hdr;
+ goto out_cleanup;
if (write_flags & WIMLIB_WRITE_FLAG_CHECK_INTEGRITY) {
ERROR("Can't include integrity check when "
"writing pipable WIM to pipe!");
- goto out_restore_hdr;
+ goto out_cleanup;
}
}
-
} else {
/* Filename of WIM to write was provided; open file descriptor
* to it. */
ret = open_wim_writable(wim, (const tchar*)path_or_fd,
O_TRUNC | O_CREAT | O_RDWR);
if (ret)
- goto out_restore_hdr;
+ goto out_cleanup;
}
/* Write initial header. This is merely a "dummy" header since it
- * doesn't have all the information yet, so it will be overwritten later
- * (unless writing a pipable WIM). */
+ * doesn't have resource entries filled in yet, so it will be
+ * overwritten later (unless writing a pipable WIM). */
if (!(write_flags & WIMLIB_WRITE_FLAG_PIPABLE))
- wim->hdr.flags |= WIM_HDR_FLAG_WRITE_IN_PROGRESS;
- ret = write_wim_header(&wim->hdr, &wim->out_fd);
- wim->hdr.flags &= ~WIM_HDR_FLAG_WRITE_IN_PROGRESS;
+ wim->out_hdr.flags |= WIM_HDR_FLAG_WRITE_IN_PROGRESS;
+ ret = write_wim_header(&wim->out_hdr, &wim->out_fd, wim->out_fd.offset);
+ wim->out_hdr.flags &= ~WIM_HDR_FLAG_WRITE_IN_PROGRESS;
if (ret)
- goto out_restore_hdr;
+ goto out_cleanup;
/* Write file data and metadata resources. */
if (!(write_flags & WIMLIB_WRITE_FLAG_PIPABLE)) {
blob_list_override,
&blob_table_list);
if (ret)
- goto out_restore_hdr;
+ goto out_cleanup;
ret = write_metadata_resources(wim, image, write_flags);
if (ret)
- goto out_restore_hdr;
+ goto out_cleanup;
} else {
/* Non-default case: create pipable WIM. */
ret = write_pipable_wim(wim, image, write_flags, num_threads,
blob_list_override,
&blob_table_list);
if (ret)
- goto out_restore_hdr;
- write_flags |= WIMLIB_WRITE_FLAG_HEADER_AT_END;
+ goto out_cleanup;
}
-
/* Write blob table, XML data, and (optional) integrity table. */
ret = finish_write(wim, image, write_flags, &blob_table_list);
-out_restore_hdr:
- memcpy(&wim->hdr, &hdr_save, sizeof(struct wim_header));
+out_cleanup:
(void)close_wim_writable(wim, write_flags);
- DEBUG("ret=%d", ret);
return ret;
}
return write_standalone_wim(wim, &fd, image, write_flags, num_threads);
}
+/* Have there been any changes to images in the specified WIM, including updates
+ * as well as deletions and additions of entire images, but excluding changes to
+ * the XML document? */
static bool
-any_images_modified(WIMStruct *wim)
+any_images_changed(WIMStruct *wim)
{
+ if (wim->image_deletion_occurred)
+ return true;
for (int i = 0; i < wim->hdr.image_count; i++)
- if (wim->image_metadata[i]->modified)
+ if (!is_image_unchanged_from_wim(wim->image_metadata[i], wim))
return true;
return false;
}
}
/* Make sure no file or metadata resources are located after the XML data (or
- * integrity table if present)--- otherwise we can't safely overwrite the WIM in
- * place and we return WIMLIB_ERR_RESOURCE_ORDER. */
+ * integrity table if present)--- otherwise we can't safely append to the WIM
+ * file and we return WIMLIB_ERR_RESOURCE_ORDER. */
static int
check_resource_offsets(WIMStruct *wim, off_t end_offset)
{
return 0;
}
+static int
+free_blob_if_invalidated(struct blob_descriptor *blob, void *_wim)
+{
+ const WIMStruct *wim = _wim;
+
+ if (!blob->will_be_in_output_wim &&
+ blob->blob_location == BLOB_IN_WIM && blob->rdesc->wim == wim)
+ {
+ blob_table_unlink(wim->blob_table, blob);
+ free_blob_descriptor(blob);
+ }
+ return 0;
+}
+
/*
* Overwrite a WIM, possibly appending new resources to it.
*
* header. This operation is potentially unsafe if the program is abruptly
* terminated while the XML data or integrity table are being overwritten, but
* before the new header has been written. To partially alleviate this problem,
- * a special flag (WIMLIB_WRITE_FLAG_CHECKPOINT_AFTER_XML) is passed to
- * finish_write() to cause a temporary WIM header to be written after the XML
- * data has been written. This may prevent the WIM from becoming corrupted if
- * the program is terminated while the integrity table is being calculated (but
- * no guarantees, due to write re-ordering...).
+ * we write a temporary header after the XML data has been written. This may
+ * prevent the WIM from becoming corrupted if the program is terminated while
+ * the integrity table is being calculated (but no guarantees, due to write
+ * re-ordering...).
*
* If we are adding new blobs, including new file data as well as any metadata
* for any new images, then the blob table needs to be changed, and those blobs
* XML data (variable size)
* Integrity table (optional) (variable size)
*
- * This method allows an image to be appended to a large WIM very quickly, and
+ * This function allows an image to be appended to a large WIM very quickly, and
* is crash-safe except in the case of write re-ordering, but the disadvantage
* is that a small hole is left in the WIM where the old blob table, xml data,
* and integrity table were. (These usually only take up a small amount of
* space compared to the blobs, however.)
+ *
+ * Finally, this function also supports "compaction" overwrites as an
+ * alternative to the normal "append" overwrites described above. In a
+ * compaction, data is written starting immediately from the end of the header.
+ * All existing resources are written first, in order by file offset. New
+ * resources are written afterwards, and at the end any extra data is truncated
+ * from the file. The advantage of this approach is that is that the WIM file
+ * ends up fully optimized, without any holes remaining. The main disadavantage
+ * is that this operation is fundamentally unsafe and cannot be interrupted
+ * without data corruption. Consequently, compactions are only ever done when
+ * explicitly requested by the library user with the flag
+ * WIMLIB_WRITE_FLAG_UNSAFE_COMPACT. (Another disadvantage is that a compaction
+ * can be much slower than an append.)
*/
static int
overwrite_wim_inplace(WIMStruct *wim, int write_flags, unsigned num_threads)
{
int ret;
off_t old_wim_end;
- u64 old_blob_table_end, old_xml_begin, old_xml_end;
- struct wim_header hdr_save;
struct list_head blob_list;
struct list_head blob_table_list;
struct filter_context filter_ctx;
- DEBUG("Overwriting `%"TS"' in-place", wim->filename);
-
- /* Save original header so it can be restored in case of error */
- memcpy(&hdr_save, &wim->hdr, sizeof(struct wim_header));
-
- /* Set default integrity flag. */
+ /* Include an integrity table by default if no preference was given and
+ * the WIM already had an integrity table. */
if (!(write_flags & (WIMLIB_WRITE_FLAG_CHECK_INTEGRITY |
WIMLIB_WRITE_FLAG_NO_CHECK_INTEGRITY)))
if (wim_has_integrity_table(wim))
write_flags |= WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
- /* Set WIM version if writing solid resources. */
+ /* Start preparing the updated file header. */
+ memcpy(&wim->out_hdr, &wim->hdr, sizeof(wim->out_hdr));
+
+ /* If using solid compression, the version number must be set to
+ * WIM_VERSION_SOLID. */
if (write_flags & WIMLIB_WRITE_FLAG_SOLID)
- wim->hdr.wim_version = WIM_VERSION_SOLID;
-
- /* Set additional flags for overwrite. */
- write_flags |= WIMLIB_WRITE_FLAG_OVERWRITE |
- WIMLIB_WRITE_FLAG_STREAMS_OK;
-
- /* Make sure there is no data after the XML data, except possibily an
- * integrity table. If this were the case, then this data would be
- * overwritten. */
- old_xml_begin = wim->hdr.xml_data_reshdr.offset_in_wim;
- old_xml_end = old_xml_begin + wim->hdr.xml_data_reshdr.size_in_wim;
- old_blob_table_end = wim->hdr.blob_table_reshdr.offset_in_wim +
- wim->hdr.blob_table_reshdr.size_in_wim;
- if (wim->hdr.integrity_table_reshdr.offset_in_wim != 0 &&
- wim->hdr.integrity_table_reshdr.offset_in_wim < old_xml_end) {
- WARNING("Didn't expect the integrity table to be before the XML data");
- ret = WIMLIB_ERR_RESOURCE_ORDER;
- goto out_restore_memory_hdr;
- }
-
- if (old_blob_table_end > old_xml_begin) {
- WARNING("Didn't expect the blob table to be after the XML data");
- ret = WIMLIB_ERR_RESOURCE_ORDER;
- goto out_restore_memory_hdr;
- }
-
- /* Set @old_wim_end, which indicates the point beyond which we don't
- * allow any file and metadata resources to appear without returning
- * WIMLIB_ERR_RESOURCE_ORDER (due to the fact that we would otherwise
- * overwrite these resources). */
- if (!wim->image_deletion_occurred && !any_images_modified(wim)) {
- /* If no images have been modified and no images have been
- * deleted, a new blob table does not need to be written. We
- * shall write the new XML data and optional integrity table
- * immediately after the blob table. Note that this may
- * overwrite an existing integrity table. */
- DEBUG("Skipping writing blob table "
- "(no images modified or deleted)");
- old_wim_end = old_blob_table_end;
- write_flags |= WIMLIB_WRITE_FLAG_NO_BLOB_TABLE |
- WIMLIB_WRITE_FLAG_CHECKPOINT_AFTER_XML;
- } else if (wim->hdr.integrity_table_reshdr.offset_in_wim != 0) {
- /* Old WIM has an integrity table; begin writing new blobs after
- * it. */
- old_wim_end = wim->hdr.integrity_table_reshdr.offset_in_wim +
- wim->hdr.integrity_table_reshdr.size_in_wim;
+ wim->out_hdr.wim_version = WIM_VERSION_SOLID;
+
+ /* Default to solid compression if it is valid in the chosen WIM file
+ * format and the WIMStruct references any solid resources. This is
+ * useful when updating a solid WIM. */
+ if (should_default_to_solid_compression(wim, write_flags))
+ write_flags |= WIMLIB_WRITE_FLAG_SOLID;
+
+ if (unlikely(write_flags & WIMLIB_WRITE_FLAG_UNSAFE_COMPACT)) {
+
+ /* In-place compaction */
+
+ WARNING("The WIM file \"%"TS"\" is being compacted in place.\n"
+ " Do *not* interrupt the operation, or else "
+ "the WIM file will be\n"
+ " corrupted!", wim->filename);
+ wim->being_compacted = 1;
+ old_wim_end = WIM_HEADER_DISK_SIZE;
+
+ ret = prepare_blob_list_for_write(wim, WIMLIB_ALL_IMAGES,
+ write_flags, &blob_list,
+ &blob_table_list, &filter_ctx);
+ if (ret)
+ goto out;
+
+ /* Prevent new files from being deduplicated with existing blobs
+ * in the WIM that we haven't decided to write. Such blobs will
+ * be overwritten during the compaction. */
+ for_blob_in_table(wim->blob_table, free_blob_if_invalidated, wim);
+
+ if (wim_has_metadata(wim)) {
+ /* Add existing metadata resources to be compacted along
+ * with the file resources. */
+ for (int i = 0; i < wim->hdr.image_count; i++) {
+ struct wim_image_metadata *imd = wim->image_metadata[i];
+ if (is_image_unchanged_from_wim(imd, wim)) {
+ fully_reference_blob_for_write(imd->metadata_blob,
+ &blob_list);
+ }
+ }
+ }
} else {
- /* No existing integrity table; begin writing new blobs after
- * the old XML data. */
- old_wim_end = old_xml_end;
- }
+ u64 old_blob_table_end, old_xml_begin, old_xml_end;
- ret = check_resource_offsets(wim, old_wim_end);
- if (ret)
- goto out_restore_memory_hdr;
+ /* Set additional flags for append. */
+ write_flags |= WIMLIB_WRITE_FLAG_APPEND |
+ WIMLIB_WRITE_FLAG_STREAMS_OK;
+
+ /* Make sure there is no data after the XML data, except
+ * possibily an integrity table. If this were the case, then
+ * this data would be overwritten. */
+ old_xml_begin = wim->hdr.xml_data_reshdr.offset_in_wim;
+ old_xml_end = old_xml_begin + wim->hdr.xml_data_reshdr.size_in_wim;
+ old_blob_table_end = wim->hdr.blob_table_reshdr.offset_in_wim +
+ wim->hdr.blob_table_reshdr.size_in_wim;
+ if (wim_has_integrity_table(wim) &&
+ wim->hdr.integrity_table_reshdr.offset_in_wim < old_xml_end) {
+ WARNING("Didn't expect the integrity table to be "
+ "before the XML data");
+ ret = WIMLIB_ERR_RESOURCE_ORDER;
+ goto out;
+ }
- ret = prepare_blob_list_for_write(wim, WIMLIB_ALL_IMAGES, write_flags,
- &blob_list, &blob_table_list,
- &filter_ctx);
+ if (old_blob_table_end > old_xml_begin) {
+ WARNING("Didn't expect the blob table to be after "
+ "the XML data");
+ ret = WIMLIB_ERR_RESOURCE_ORDER;
+ goto out;
+ }
+ /* Set @old_wim_end, which indicates the point beyond which we
+ * don't allow any file and metadata resources to appear without
+ * returning WIMLIB_ERR_RESOURCE_ORDER (due to the fact that we
+ * would otherwise overwrite these resources). */
+ if (!any_images_changed(wim)) {
+ /* If no images have been modified, added, or deleted,
+ * then a new blob table does not need to be written.
+ * We shall write the new XML data and optional
+ * integrity table immediately after the blob table.
+ * Note that this may overwrite an existing integrity
+ * table. */
+ old_wim_end = old_blob_table_end;
+ write_flags |= WIMLIB_WRITE_FLAG_NO_NEW_BLOBS;
+ } else if (wim_has_integrity_table(wim)) {
+ /* Old WIM has an integrity table; begin writing new
+ * blobs after it. */
+ old_wim_end = wim->hdr.integrity_table_reshdr.offset_in_wim +
+ wim->hdr.integrity_table_reshdr.size_in_wim;
+ } else {
+ /* No existing integrity table; begin writing new blobs
+ * after the old XML data. */
+ old_wim_end = old_xml_end;
+ }
+
+ ret = check_resource_offsets(wim, old_wim_end);
+ if (ret)
+ goto out;
+
+ ret = prepare_blob_list_for_write(wim, WIMLIB_ALL_IMAGES,
+ write_flags, &blob_list,
+ &blob_table_list, &filter_ctx);
+ if (ret)
+ goto out;
+
+ if (write_flags & WIMLIB_WRITE_FLAG_NO_NEW_BLOBS)
+ wimlib_assert(list_empty(&blob_list));
+ }
+
+ /* Update image stats if needed. */
+ ret = update_image_stats(wim);
if (ret)
- goto out_restore_memory_hdr;
+ goto out;
ret = open_wim_writable(wim, wim->filename, O_RDWR);
if (ret)
- goto out_restore_memory_hdr;
+ goto out;
ret = lock_wim_for_append(wim);
if (ret)
/* Set WIM_HDR_FLAG_WRITE_IN_PROGRESS flag in header. */
wim->hdr.flags |= WIM_HDR_FLAG_WRITE_IN_PROGRESS;
ret = write_wim_header_flags(wim->hdr.flags, &wim->out_fd);
+ wim->hdr.flags &= ~WIM_HDR_FLAG_WRITE_IN_PROGRESS;
if (ret) {
ERROR_WITH_ERRNO("Error updating WIM header flags");
goto out_unlock_wim;
if (filedes_seek(&wim->out_fd, old_wim_end) == -1) {
ERROR_WITH_ERRNO("Can't seek to end of WIM");
ret = WIMLIB_ERR_WRITE;
- goto out_restore_physical_hdr;
+ goto out_restore_hdr;
}
ret = write_file_data_blobs(wim, &blob_list, write_flags,
return 0;
out_truncate:
- if (!(write_flags & WIMLIB_WRITE_FLAG_NO_BLOB_TABLE)) {
- WARNING("Truncating `%"TS"' to its original size (%"PRIu64" bytes)",
- wim->filename, old_wim_end);
+ if (!(write_flags & (WIMLIB_WRITE_FLAG_NO_NEW_BLOBS |
+ WIMLIB_WRITE_FLAG_UNSAFE_COMPACT))) {
+ WARNING("Truncating \"%"TS"\" to its original size "
+ "(%"PRIu64" bytes)", wim->filename, old_wim_end);
/* Return value of ftruncate() is ignored because this is
* already an error path. */
(void)ftruncate(wim->out_fd.fd, old_wim_end);
}
-out_restore_physical_hdr:
- (void)write_wim_header_flags(hdr_save.flags, &wim->out_fd);
+out_restore_hdr:
+ (void)write_wim_header_flags(wim->hdr.flags, &wim->out_fd);
out_unlock_wim:
unlock_wim_for_append(wim);
out_close_wim:
(void)close_wim_writable(wim, write_flags);
-out_restore_memory_hdr:
- memcpy(&wim->hdr, &hdr_save, sizeof(struct wim_header));
+out:
+ wim->being_compacted = 0;
return ret;
}
size_t wim_name_len;
int ret;
- DEBUG("Overwriting `%"TS"' via a temporary file", wim->filename);
-
/* Write the WIM to a temporary file in the same directory as the
* original WIM. */
wim_name_len = tstrlen(wim->filename);
/* Rename the new WIM file to the original WIM file. Note: on Windows
* this actually calls win32_rename_replacement(), not _wrename(), so
* that removing the existing destination file can be handled. */
- DEBUG("Renaming `%"TS"' to `%"TS"'", tmpfile, wim->filename);
ret = trename(tmpfile, wim->filename);
if (ret) {
ERROR_WITH_ERRNO("Failed to rename `%"TS"' to `%"TS"'",
&progress, wim->progctx);
}
-/* Determine if the specified WIM file may be updated by appending in-place
- * rather than writing and replacing it with an entirely new file. */
+/* Determine if the specified WIM file may be updated in-place rather than by
+ * writing and replacing it with an entirely new file. */
static bool
can_overwrite_wim_inplace(const WIMStruct *wim, int write_flags)
{
if (!wim->filename)
return WIMLIB_ERR_NO_FILENAME;
+ if (unlikely(write_flags & WIMLIB_WRITE_FLAG_UNSAFE_COMPACT)) {
+ /*
+ * In UNSAFE_COMPACT mode:
+ * - RECOMPRESS is forbidden
+ * - REBUILD is ignored
+ * - SOFT_DELETE and NO_SOLID_SORT are implied
+ */
+ if (write_flags & WIMLIB_WRITE_FLAG_RECOMPRESS)
+ return WIMLIB_ERR_COMPACTION_NOT_POSSIBLE;
+ write_flags &= ~WIMLIB_WRITE_FLAG_REBUILD;
+ write_flags |= WIMLIB_WRITE_FLAG_SOFT_DELETE;
+ write_flags |= WIMLIB_WRITE_FLAG_NO_SOLID_SORT;
+ }
+
orig_hdr_flags = wim->hdr.flags;
if (write_flags & WIMLIB_WRITE_FLAG_IGNORE_READONLY_FLAG)
wim->hdr.flags &= ~WIM_HDR_FLAG_READONLY;
return ret;
WARNING("Falling back to re-building entire WIM");
}
+ if (write_flags & WIMLIB_WRITE_FLAG_UNSAFE_COMPACT)
+ return WIMLIB_ERR_COMPACTION_NOT_POSSIBLE;
return overwrite_wim_via_tmpfile(wim, write_flags, num_threads);
}
git://wimlib.net / wimlib / blobdiff