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Fixed dedup files handling.

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This commit is contained in:
Andrea Mazzoleni 2012-11-13 19:10:01 +01:00
parent 02f11d558f
commit 289c96974c
2 changed files with 130 additions and 10 deletions
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1
HISTORY
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@ -34,6 +34,7 @@ SnapRAID HISTORY
* Removed MD5 support.
* The -N, --find-by-name option also ignores the nanosecond part of
timestamps to work with copy programs not supporting nanoseconds.
* Fixed deduplicated files handling in Windows Server 2012.
1.13 2012/11
============

139
mingw.c
View file

@ -21,6 +21,23 @@
#include "mingw.h"
/* Adds missing Windows declaration */
typedef struct _FILE_ATTRIBUTE_TAG_INFO {
DWORD FileAttributes;
DWORD ReparseTag;
} FILE_ATTRIBUTE_TAG_INFO;
#define FileAttributeTagInfo 9
#ifndef IO_REPARSE_TAG_DEDUP
#define IO_REPARSE_TAG_DEDUP (0x80000013)
#endif
#ifndef IO_REPARSE_TAG_NFS
#define IO_REPARSE_TAG_NFS (0x80000014)
#endif
#ifndef IO_REPARSE_TAG_MOUNT_POINT
#define IO_REPARSE_TAG_MOUNT_POINT (0xA0000003)
#endif
/**
* Number of conversion buffers.
*/
@ -153,10 +170,46 @@ static wchar_t* convert(const char* src)
return conv_utf16_buffer[conv_utf16];
}
/**
* Portable implementation of GetFileInformationByHandleEx.
* This function is not available in Windows XP.
*/
static int flag_GetFileInformationByHandleEx = 0;
static BOOL (WINAPI* ptr_GetFileInformationByHandleEx)(HANDLE, DWORD, LPVOID, DWORD) = 0;
static BOOL GetReparseTagInfoByHandle(HANDLE hFile, FILE_ATTRIBUTE_TAG_INFO* lpFileAttributeTagInfo, DWORD dwFileAttributes)
{
/* if not yet initialized, do it now */
if (!flag_GetFileInformationByHandleEx) {
HMODULE h = GetModuleHandleA("KERNEL32.DLL");
if (h) {
ptr_GetFileInformationByHandleEx = (void*)GetProcAddress(h, "GetFileInformationByHandleEx");
}
flag_GetFileInformationByHandleEx = 1;
}
/* if not reparse point, return no info */
if ((dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) == 0) {
lpFileAttributeTagInfo->FileAttributes = dwFileAttributes;
lpFileAttributeTagInfo->ReparseTag = 0;
return TRUE;
}
/* if not available, return no info */
if (!ptr_GetFileInformationByHandleEx) {
lpFileAttributeTagInfo->FileAttributes = dwFileAttributes;
lpFileAttributeTagInfo->ReparseTag = 0;
return TRUE;
}
/* do the real call */
return ptr_GetFileInformationByHandleEx(hFile, FileAttributeTagInfo, lpFileAttributeTagInfo, sizeof(FILE_ATTRIBUTE_TAG_INFO));
}
/**
* Converts Windows info to the Unix stat format.
*/
static void windows_info2stat(const BY_HANDLE_FILE_INFORMATION* info, struct windows_stat* st)
static void windows_info2stat(const BY_HANDLE_FILE_INFORMATION* info, const FILE_ATTRIBUTE_TAG_INFO* tag, struct windows_stat* st)
{
uint64_t mtime;
@ -167,9 +220,31 @@ static void windows_info2stat(const BY_HANDLE_FILE_INFORMATION* info, struct win
} else if ((info->dwFileAttributes & FILE_ATTRIBUTE_SYSTEM) != 0) { /* System files */
st->st_mode = S_IFCHR;
st->st_desc = "system";
} else if ((info->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0) { /* Symbolic links */
st->st_mode = S_IFCHR;
st->st_desc = "reparse-point";
} else if ((info->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0) { /* Reparse point */
switch (tag->ReparseTag) {
/* For deduplicated files, assume that they are regular ones */
case IO_REPARSE_TAG_DEDUP :
st->st_mode = S_IFREG;
st->st_desc = "regular-dedup";
break;
/* All the other are skipped as reparse-point */
case IO_REPARSE_TAG_MOUNT_POINT :
st->st_mode = S_IFCHR;
st->st_desc = "reparse-point-mount";
break;
case IO_REPARSE_TAG_NFS :
st->st_mode = S_IFCHR;
st->st_desc = "reparse-point-nfs";
break;
case IO_REPARSE_TAG_SYMLINK :
st->st_mode = S_IFCHR;
st->st_desc = "reparse-point-symlink";
break;
default:
st->st_mode = S_IFCHR;
st->st_desc = "reparse-point";
break;
}
} else if ((info->dwFileAttributes & FILE_ATTRIBUTE_OFFLINE) != 0) {
st->st_mode = S_IFCHR;
st->st_desc = "offline";
@ -228,9 +303,31 @@ static void windows_finddata2stat(const WIN32_FIND_DATAW* info, struct windows_s
} else if ((info->dwFileAttributes & FILE_ATTRIBUTE_SYSTEM) != 0) { /* System files */
st->st_mode = S_IFCHR;
st->st_desc = "system";
} else if ((info->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0) { /* Symbolic links */
st->st_mode = S_IFCHR;
st->st_desc = "reparse-point";
} else if ((info->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0) { /* Reparse Point */
switch (info->dwReserved0) {
/* For deduplicated files, assume that they are regular ones */
case IO_REPARSE_TAG_DEDUP :
st->st_mode = S_IFREG;
st->st_desc = "regular-dedup";
break;
/* All the other are skipped as reparse-point */
case IO_REPARSE_TAG_MOUNT_POINT :
st->st_mode = S_IFCHR;
st->st_desc = "reparse-point-mount";
break;
case IO_REPARSE_TAG_NFS :
st->st_mode = S_IFCHR;
st->st_desc = "reparse-point-nfs";
break;
case IO_REPARSE_TAG_SYMLINK :
st->st_mode = S_IFCHR;
st->st_desc = "reparse-point-symlink";
break;
default:
st->st_mode = S_IFCHR;
st->st_desc = "reparse-point";
break;
}
} else if ((info->dwFileAttributes & FILE_ATTRIBUTE_OFFLINE) != 0) {
st->st_mode = S_IFCHR;
st->st_desc = "offline";
@ -324,6 +421,7 @@ static void windows_errno(DWORD error)
int windows_fstat(int fd, struct windows_stat* st)
{
BY_HANDLE_FILE_INFORMATION info;
FILE_ATTRIBUTE_TAG_INFO tag;
HANDLE h;
h = (HANDLE)_get_osfhandle(fd);
@ -337,7 +435,12 @@ int windows_fstat(int fd, struct windows_stat* st)
return -1;
}
windows_info2stat(&info, st);
if (!GetReparseTagInfoByHandle(h, &tag, info.dwFileAttributes)) {
windows_errno(GetLastError());
return -1;
}
windows_info2stat(&info, &tag, st);
return 0;
}
@ -376,6 +479,7 @@ int windows_mkdir(const char* file)
int lstat_ex(const char* file, struct windows_stat* st)
{
BY_HANDLE_FILE_INFORMATION info;
FILE_ATTRIBUTE_TAG_INFO tag;
HANDLE h;
/*
@ -397,12 +501,19 @@ int lstat_ex(const char* file, struct windows_stat* st)
return -1;
}
if (!GetReparseTagInfoByHandle(h, &tag, info.dwFileAttributes)) {
DWORD error = GetLastError();
CloseHandle(h);
windows_errno(error);
return -1;
}
if (!CloseHandle(h)) {
windows_errno(GetLastError());
return -1;
}
windows_info2stat(&info, st);
windows_info2stat(&info, &tag, st);
return 0;
}
@ -410,6 +521,7 @@ int lstat_ex(const char* file, struct windows_stat* st)
int windows_stat(const char* file, struct windows_stat* st)
{
BY_HANDLE_FILE_INFORMATION info;
FILE_ATTRIBUTE_TAG_INFO tag;
HANDLE h;
/*
@ -430,12 +542,19 @@ int windows_stat(const char* file, struct windows_stat* st)
return -1;
}
if (!GetReparseTagInfoByHandle(h, &tag, info.dwFileAttributes)) {
DWORD error = GetLastError();
CloseHandle(h);
windows_errno(error);
return -1;
}
if (!CloseHandle(h)) {
windows_errno(GetLastError());
return -1;
}
windows_info2stat(&info, st);
windows_info2stat(&info, &tag, st);
return 0;
}