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Uses an external GetFilePhysicalOffset to make code clear.

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This commit is contained in:
Andrea Mazzoleni 2014-10-04 18:05:50 +02:00
parent a76aa1dd0b
commit 21a88175d5
2 changed files with 35 additions and 23 deletions
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6
TODO
View file

@ -17,6 +17,12 @@ get misinterpreted.
* Shall CreateFileW use FILE_SHARE_DELETE ?
* Merge lstat_sync() and filephy() ? This could save one CreateFileW()
but it's not clear how it will behave with ReparsePoint, like dedup files.
lsync_stat opens with BACKUP_SEMANTICS/REPARSE_POINT then instead filephy()
opens with 0.
See merge_lstat_sync_and_filephy.diff in contrib/
- Minor
* Provides a way to rename disks in content file.

52
cmdline/mingw.c
View file

@ -1348,28 +1348,18 @@ int devuuid(uint64_t device, char* uuid, size_t uuid_size)
return 0;
}
int filephy(const char* file, uint64_t size, uint64_t* physical)
static BOOL GetFilePhysicalOffset(HANDLE h, uint64_t* physical)
{
HANDLE h;
STARTING_VCN_INPUT_BUFFER svib;
unsigned char rpb_buffer[sizeof(RETRIEVAL_POINTERS_BUFFER)];
RETRIEVAL_POINTERS_BUFFER* rpb = (RETRIEVAL_POINTERS_BUFFER*)&rpb_buffer;
BOOL ret;
DWORD n;
(void)size;
/* in Wine FSCTL_GET_RETRIVIAL_POINTERS is not supported */
if (is_wine) {
*physical = FILEPHY_UNREPORTED_OFFSET;
return 0;
}
/* open the handle of the file */
h = CreateFileW(convert(file), 0, FILE_SHARE_READ | FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0);
if (h == INVALID_HANDLE_VALUE) {
windows_errno(GetLastError());
return -1;
return TRUE;
}
/* set the output variable, just to be safe */
@ -1389,29 +1379,45 @@ int filephy(const char* file, uint64_t size, uint64_t* physical)
/* In such case we report a specific fake address, to report this special condition */
/* that it's different from the 0 offset reported by the underline file system */
*physical = FILEPHY_WITHOUT_OFFSET;
CloseHandle(h);
return 0;
return TRUE;
} else if (error == ERROR_NOT_SUPPORTED) {
/* for disks shared on network this operation is not supported */
*physical = FILEPHY_UNREPORTED_OFFSET;
CloseHandle(h);
return 0;
return TRUE;
} else {
windows_errno(error);
CloseHandle(h);
return -1;
return FALSE;
}
}
CloseHandle(h);
if (rpb->ExtentCount < 1)
*physical = FILEPHY_UNREPORTED_OFFSET;
else
*physical = rpb->Extents[0].Lcn.QuadPart + FILEPHY_REAL_OFFSET;
return TRUE;
}
int filephy(const char* file, uint64_t size, uint64_t* physical)
{
HANDLE h;
(void)size;
/* open the handle of the file */
h = CreateFileW(convert(file), 0, FILE_SHARE_READ | FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0);
if (h == INVALID_HANDLE_VALUE) {
windows_errno(GetLastError());
return -1;
}
if (!GetFilePhysicalOffset(h, physical)) {
DWORD error = GetLastError();
CloseHandle(h);
windows_errno(error);
return -1;
}
CloseHandle(h);
return 0;
}