Move payload generator files to payload_generator/ directory.
This creates a new subdirectory payload_generator/ with all the
payload generator specific files.
The SConstruct file is updated to continue building all the files
together, including those in the subdirectories, since some parts
of the update_engine are using parts of the payload generation code.
To reduce this code coupling, a new payload_constants.h file is
introduced, with few constants used on the payload definition by both
the payload generation and the payload performer.
Finally, includes are updated and in some cases removed when they
weren't used. Order of includes is also fixed to comply with the
style guide.
BUG=chromium:374377
TEST=Build and unittests still pass. delta_generator still present on base directory.
Change-Id: I454bbc7a66c70ebb19fd596c352c7be40a081f3d
Reviewed-on: https://chromium-review.googlesource.com/200325
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Alex Deymo <deymo@chromium.org>
Tested-by: Alex Deymo <deymo@chromium.org>
diff --git a/payload_generator/extent_mapper.cc b/payload_generator/extent_mapper.cc
new file mode 100644
index 0000000..9e66619
--- /dev/null
+++ b/payload_generator/extent_mapper.cc
@@ -0,0 +1,93 @@
+// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "update_engine/payload_generator/extent_mapper.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/fs.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "update_engine/payload_constants.h"
+#include "update_engine/payload_generator/graph_types.h"
+#include "update_engine/payload_generator/graph_utils.h"
+#include "update_engine/utils.h"
+
+using std::string;
+using std::vector;
+
+namespace chromeos_update_engine {
+
+namespace extent_mapper {
+
+namespace {
+const int kBlockSize = 4096;
+}
+
+bool ExtentsForFileChunkFibmap(const std::string& path,
+ off_t chunk_offset,
+ off_t chunk_size,
+ std::vector<Extent>* out) {
+ CHECK(out);
+ CHECK_EQ(0, chunk_offset % kBlockSize);
+ CHECK(chunk_size == -1 || chunk_size >= 0);
+ struct stat stbuf;
+ int rc = stat(path.c_str(), &stbuf);
+ TEST_AND_RETURN_FALSE_ERRNO(rc == 0);
+ TEST_AND_RETURN_FALSE(S_ISREG(stbuf.st_mode));
+
+ int fd = open(path.c_str(), O_RDONLY, 0);
+ TEST_AND_RETURN_FALSE_ERRNO(fd >= 0);
+ ScopedFdCloser fd_closer(&fd);
+
+ // Get file size in blocks
+ rc = fstat(fd, &stbuf);
+ if (rc < 0) {
+ perror("fstat");
+ return false;
+ }
+ CHECK_LE(chunk_offset, stbuf.st_size);
+ off_t size = stbuf.st_size - chunk_offset;
+ if (chunk_size != -1) {
+ size = std::min(size, chunk_size);
+ }
+ const int block_count = (size + kBlockSize - 1) / kBlockSize;
+ const int start_block = chunk_offset / kBlockSize;
+ Extent current;
+ current.set_start_block(0);
+ current.set_num_blocks(0);
+
+ for (int i = start_block; i < start_block + block_count; i++) {
+ unsigned int block32 = i;
+ rc = ioctl(fd, FIBMAP, &block32);
+ TEST_AND_RETURN_FALSE_ERRNO(rc == 0);
+
+ const uint64_t block = (block32 == 0 ? kSparseHole : block32);
+
+ graph_utils::AppendBlockToExtents(out, block);
+ }
+ return true;
+}
+
+bool ExtentsForFileFibmap(const std::string& path, std::vector<Extent>* out) {
+ return ExtentsForFileChunkFibmap(path, 0, -1, out);
+}
+
+bool GetFilesystemBlockSize(const std::string& path, uint32_t* out_blocksize) {
+ int fd = open(path.c_str(), O_RDONLY, 0);
+ TEST_AND_RETURN_FALSE_ERRNO(fd >= 0);
+ ScopedFdCloser fd_closer(&fd);
+ int rc = ioctl(fd, FIGETBSZ, out_blocksize);
+ TEST_AND_RETURN_FALSE_ERRNO(rc != -1);
+ return true;
+}
+
+} // namespace extent_mapper
+
+} // namespace chromeos_update_engine