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[ext2fs] improve formatting speed

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* Fix use of EXT2_BLOCK_SIZE() instead of EXT2_INODE_SIZE() during inode
  initialization, that made us zero way many more blocks than was needed.
* Also disable sparse_super feature and improve block setup.
* Also explicitly use IS_POWER_OF_2 macro where required.
This commit is contained in:
Pete Batard 2020-02-11 19:22:22 +00:00
parent 35af4cbacb
commit 9edd7492db
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GPG key ID: 38E0CF5E69EDD671
4 changed files with 22 additions and 19 deletions
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25
src/format_ext.c
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@ -218,15 +218,18 @@ const char* GetExtFsLabel(DWORD DriveIndex, uint64_t PartitionOffset)
return (r == 0) ? label : NULL;
}
#define TEST_IMG_PATH "\\??\\C:\\tmp\\disk.img"
#define TEST_IMG_SIZE 4000 // Size in MB
BOOL FormatExtFs(DWORD DriveIndex, uint64_t PartitionOffset, DWORD BlockSize, LPCSTR FSName, LPCSTR Label, DWORD Flags)
{
// Mostly taken from mke2fs.conf
const float reserve_ratio = 0.05f;
const ext2fs_default_t ext2fs_default[5] = {
{ 3 * MB, 1024, 128, 3}, // "floppy"
{ 3 * MB, 1024, 128, 3}, // "floppy"
{ 512 * MB, 1024, 128, 2}, // "small"
{ 4 * GB, 4096, 256, 2}, // "default"
{ 16 * GB, 4096, 256, 3}, // "big"
{ 4 * GB, 4096, 256, 2}, // "default"
{ 16 * GB, 4096, 256, 3}, // "big"
{ 1024 * TB, 4096, 256, 4} // "huge"
};
@ -298,15 +301,16 @@ BOOL FormatExtFs(DWORD DriveIndex, uint64_t PartitionOffset, DWORD BlockSize, LP
break;
}
assert(i < ARRAYSIZE(ext2fs_default));
// NB: We validated that BlockSize is a power of two in FormatPartition()
if (BlockSize == 0)
if ((BlockSize == 0) || (BlockSize < EXT2_MIN_BLOCK_SIZE))
BlockSize = ext2fs_default[i].block_size;
size /= BlockSize;
assert(IS_POWER_OF_2(BlockSize));
for (features.s_log_block_size = 0; EXT2_BLOCK_SIZE_BITS(&features) <= EXT2_MAX_BLOCK_LOG_SIZE; features.s_log_block_size++) {
if (EXT2_BLOCK_SIZE(&features) == BlockSize)
break;
}
assert(EXT2_BLOCK_SIZE_BITS(&features) <= EXT2_MAX_BLOCK_LOG_SIZE);
features.s_log_cluster_size = features.s_log_block_size;
size /= BlockSize;
// Set the blocks, reserved blocks and inodes
ext2fs_blocks_count_set(&features, size);
@ -320,10 +324,10 @@ BOOL FormatExtFs(DWORD DriveIndex, uint64_t PartitionOffset, DWORD BlockSize, LP
// Set features
ext2fs_set_feature_xattr(&features);
// ext2fs_set_feature_resize_inode(&features);
// ext2fs_set_feature_resize_inode(&features);
ext2fs_set_feature_dir_index(&features);
ext2fs_set_feature_filetype(&features);
ext2fs_set_feature_sparse_super(&features);
// ext2fs_set_feature_sparse_super(&features);
ext2fs_set_feature_large_file(&features);
if (FSName[3] != '2')
ext2fs_set_feature_journal(&features);
@ -372,6 +376,8 @@ BOOL FormatExtFs(DWORD DriveIndex, uint64_t PartitionOffset, DWORD BlockSize, LP
goto out;
}
// TODO: mke2fs appears to be zeroing some data at the end of the partition as well
ext2_percent_start = 0.0f;
ext2_percent_share = (FSName[3] == '2') ? 1.0f : 0.5f;
uprintf("Creating %d inode sets: [1 marker = %0.1f set(s)]", ext2fs->group_desc_count,
@ -381,7 +387,7 @@ BOOL FormatExtFs(DWORD DriveIndex, uint64_t PartitionOffset, DWORD BlockSize, LP
goto out;
cur = ext2fs_inode_table_loc(ext2fs, i);
count = ext2fs_div_ceil((ext2fs->super->s_inodes_per_group - ext2fs_bg_itable_unused(ext2fs, i))
* EXT2_BLOCK_SIZE(ext2fs->super), EXT2_BLOCK_SIZE(ext2fs->super));
* EXT2_INODE_SIZE(ext2fs->super), EXT2_BLOCK_SIZE(ext2fs->super));
r = ext2fs_zero_blocks2(ext2fs, cur, count, &cur, &count);
if (r != 0) {
FormatStatus = ext2_last_winerror(ERROR_WRITE_FAULT);
@ -488,4 +494,3 @@ out:
free(buf);
return ret;
}