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[iso] improve write performance during ISO extraction

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* Now preallocate the file size for each extracted file, to help the target
  filesystem avoid fragmentation issues and thus increase writing speed.
* Closes #1170
This commit is contained in:
Mattiwatti 2018-06-24 00:59:36 +02:00 • committed by Pete Batard
parent dbc92e3adc
commit d4a4506b16
2 changed files with 55 additions and 40 deletions
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19
src/iso.c
View file

@ -361,6 +361,15 @@ static void __inline set_directory_timestamp(char* path, LPFILETIME creation, LP
safe_closehandle(dir_handle);
}
// Preallocates the target size of a newly created file in order to prevent fragmentation from repeated writes
static void __inline preallocate_filesize(HANDLE hFile, int64_t file_length)
{
SetFileInformationByHandle(hFile, FileEndOfFileInfo, &file_length, sizeof(file_length));
// FileAllocationInfo does not require the size to be a multiple of the cluster size; the FS driver takes care of this.
SetFileInformationByHandle(hFile, FileAllocationInfo, &file_length, sizeof(file_length));
}
// Returns 0 on success, nonzero on error
static int udf_extract_files(udf_t *p_udf, udf_dirent_t *p_udf_dirent, const char *psz_path)
{
@ -440,7 +449,9 @@ static int udf_extract_files(udf_t *p_udf, udf_dirent_t *p_udf_dirent, const cha
uprintf(stupid_antivirus);
else
goto out;
} else while (file_length > 0) {
} else {
preallocate_filesize(file_handle, file_length);
while (file_length > 0) {
if (FormatStatus) goto out;
memset(buf, 0, UDF_BLOCKSIZE);
read = udf_read_block(p_udf_dirent, buf, 1);
@ -458,6 +469,7 @@ static int udf_extract_files(udf_t *p_udf, udf_dirent_t *p_udf_dirent, const cha
if (nb_blocks++ % PROGRESS_THRESHOLD == 0)
UpdateProgress(OP_DOS, 100.0f*nb_blocks/total_blocks);
}
}
if ((preserve_timestamps) && (!SetFileTime(file_handle, to_filetime(udf_get_attribute_time(p_udf_dirent)),
to_filetime(udf_get_access_time(p_udf_dirent)), to_filetime(udf_get_modification_time(p_udf_dirent)))))
uprintf(" Could not set timestamp: %s", WindowsErrorString());
@ -586,7 +598,9 @@ static int iso_extract_files(iso9660_t* p_iso, const char *psz_path)
uprintf(stupid_antivirus);
else
goto out;
} else for (j=0; j<p_statbuf->extents; j++) {
} else {
preallocate_filesize(file_handle, file_length);
for (j=0; j<p_statbuf->extents; j++) {
extent_length = p_statbuf->extsize[j];
for (i=0; extent_length>0; i++) {
if (FormatStatus) goto out;
@ -608,6 +622,7 @@ static int iso_extract_files(iso9660_t* p_iso, const char *psz_path)
UpdateProgress(OP_DOS, 100.0f*nb_blocks/total_blocks);
}
}
}
if (preserve_timestamps) {
LPFILETIME ft = to_filetime(mktime(&p_statbuf->tm));
if (!SetFileTime(file_handle, ft, ft, ft))

10
src/rufus.rc
View file

@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
IDD_DIALOG DIALOGEX 12, 12, 232, 326
STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
EXSTYLE WS_EX_ACCEPTFILES
CAPTION "Rufus 3.1.1322"
CAPTION "Rufus 3.1.1323"
FONT 9, "Segoe UI Symbol", 400, 0, 0x0
BEGIN
LTEXT "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
@ -389,8 +389,8 @@ END
//
VS_VERSION_INFO VERSIONINFO
FILEVERSION 3,1,1322,0
PRODUCTVERSION 3,1,1322,0
FILEVERSION 3,1,1323,0
PRODUCTVERSION 3,1,1323,0
FILEFLAGSMASK 0x3fL
#ifdef _DEBUG
FILEFLAGS 0x1L
@ -407,13 +407,13 @@ BEGIN
BEGIN
VALUE "CompanyName", "Akeo Consulting (http://akeo.ie)"
VALUE "FileDescription", "Rufus"
VALUE "FileVersion", "3.1.1322"
VALUE "FileVersion", "3.1.1323"
VALUE "InternalName", "Rufus"
VALUE "LegalCopyright", "© 2011-2018 Pete Batard (GPL v3)"
VALUE "LegalTrademarks", "http://www.gnu.org/copyleft/gpl.html"
VALUE "OriginalFilename", "rufus.exe"
VALUE "ProductName", "Rufus"
VALUE "ProductVersion", "3.1.1322"
VALUE "ProductVersion", "3.1.1323"
END
END
BLOCK "VarFileInfo"