* autoload.cc (LoadDLLfuncNt): Re-invent.
(NtCreateTransaction): Define. (NtCommitTransaction): Define. (NtRollbackTransaction): Define. (RtlGetCurrentTransaction): Define. (RtlSetCurrentTransaction): Define. * ntdll.h (TRANSACTION_ALL_ACCESS): Define. (NtCreateTransaction): Declare. (NtCommitTransaction): Declare. (NtRollbackTransaction): Declare. (RtlGetCurrentTransaction): Declare. (RtlSetCurrentTransaction): Declare. * syscalls.cc (start_transaction): New static function to start TxF transaction. (stop_transaction): New static function to end TxF transaction. (rename): Call start_transaction and stop_transaction where appropriate on systems supporting transactions. * wincap.h (wincaps::has_transactions): New element. * wincap.cc: Implement above element throughout.
This commit is contained in:
Corinna Vinschen
parent
43334bd027
commit
4c153b24d9
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@ -1,3 +1,25 @@
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2008-05-15 Corinna Vinschen <corinna@vinschen.de>
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* autoload.cc (LoadDLLfuncNt): Re-invent.
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(NtCreateTransaction): Define.
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(NtCommitTransaction): Define.
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(NtRollbackTransaction): Define.
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(RtlGetCurrentTransaction): Define.
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(RtlSetCurrentTransaction): Define.
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* ntdll.h (TRANSACTION_ALL_ACCESS): Define.
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(NtCreateTransaction): Declare.
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(NtCommitTransaction): Declare.
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(NtRollbackTransaction): Declare.
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(RtlGetCurrentTransaction): Declare.
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(RtlSetCurrentTransaction): Declare.
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* syscalls.cc (start_transaction): New static function to start TxF
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transaction.
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(stop_transaction): New static function to end TxF transaction.
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(rename): Call start_transaction and stop_transaction where appropriate
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on systems supporting transactions.
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* wincap.h (wincaps::has_transactions): New element.
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* wincap.cc: Implement above element throughout.
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2008-05-14 Corinna Vinschen <corinna@vinschen.de>
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* fhandler_disk_file.cc (fhandler_disk_file::readdir_helper): Drop
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@ -311,6 +311,15 @@ LoadDLLfunc (NetLocalGroupGetMembers, 32, netapi32)
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LoadDLLfunc (NetUserGetGroups, 28, netapi32)
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LoadDLLfunc (NetUserGetInfo, 16, netapi32)
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/* 0xc000007a == STATUS_PROCEDURE_NOT_FOUND */
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#define LoadDLLfuncNt(name, n, dllname) \
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LoadDLLfuncEx2(name, n, dllname, 1, 0xc000007a)
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LoadDLLfuncNt (NtCommitTransaction, 8, ntdll)
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LoadDLLfuncNt (NtCreateTransaction, 40, ntdll)
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LoadDLLfuncNt (NtRollbackTransaction, 8, ntdll)
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LoadDLLfuncNt (RtlGetCurrentTransaction, 0, ntdll)
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LoadDLLfuncNt (RtlSetCurrentTransaction, 4, ntdll)
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LoadDLLfuncEx (EnumProcessModules, 16, psapi, 1)
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LoadDLLfuncEx (GetModuleFileNameExW, 16, psapi, 1)
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LoadDLLfuncEx (GetModuleInformation, 16, psapi, 1)
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@ -77,6 +77,9 @@
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#define FILE_AUTOGENERATED_DEVICE_NAME 0x00000080
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#define FILE_DEVICE_SECURE_OPEN 0x00000100
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/* Transaction access rights. */
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#define TRANSACTION_ALL_ACCESS (STANDARD_RIGHTS_REQUIRED | 0x3F)
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typedef enum _FILE_INFORMATION_CLASS
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{
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FileDirectoryInformation = 1,
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@ -855,6 +858,7 @@ extern "C"
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NTSTATUS NTAPI NtAdjustPrivilegesToken (HANDLE, BOOLEAN, PTOKEN_PRIVILEGES,
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ULONG, PTOKEN_PRIVILEGES, PULONG);
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NTSTATUS NTAPI NtClose (HANDLE);
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NTSTATUS NTAPI NtCommitTransaction (HANDLE, BOOLEAN);
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NTSTATUS NTAPI NtCreateDirectoryObject (PHANDLE, ACCESS_MASK,
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POBJECT_ATTRIBUTES);
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NTSTATUS NTAPI NtCreateEvent (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
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@ -876,6 +880,9 @@ extern "C"
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PTOKEN_GROUPS, PTOKEN_PRIVILEGES, PTOKEN_OWNER,
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PTOKEN_PRIMARY_GROUP, PTOKEN_DEFAULT_DACL,
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PTOKEN_SOURCE);
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NTSTATUS NTAPI NtCreateTransaction (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
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LPGUID, HANDLE, ULONG, ULONG, ULONG,
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PLARGE_INTEGER, PUNICODE_STRING);
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NTSTATUS NTAPI NtFsControlFile (HANDLE, HANDLE, PIO_APC_ROUTINE, PVOID,
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PIO_STATUS_BLOCK, ULONG, PVOID, ULONG,
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PVOID, ULONG);
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@ -929,6 +936,7 @@ extern "C"
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NTSTATUS NTAPI NtReadFile (HANDLE, HANDLE, PIO_APC_ROUTINE, PVOID,
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PIO_STATUS_BLOCK, PVOID, ULONG, PLARGE_INTEGER,
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PULONG);
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NTSTATUS NTAPI NtRollbackTransaction (HANDLE, BOOLEAN);
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NTSTATUS NTAPI NtSetEaFile (HANDLE, PIO_STATUS_BLOCK, PVOID, ULONG);
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NTSTATUS NTAPI NtSetInformationFile (HANDLE, PIO_STATUS_BLOCK, PVOID, ULONG,
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FILE_INFORMATION_CLASS);
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@ -957,6 +965,7 @@ extern "C"
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VOID NTAPI RtlFreeAnsiString (PANSI_STRING);
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VOID NTAPI RtlFreeOemString (POEM_STRING);
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VOID NTAPI RtlFreeUnicodeString (PUNICODE_STRING);
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HANDLE NTAPI RtlGetCurrentTransaction ();
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VOID NTAPI RtlInitEmptyUnicodeString (PUNICODE_STRING, PCWSTR, USHORT);
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VOID NTAPI RtlInitUnicodeString (PUNICODE_STRING, PCWSTR);
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NTSTATUS NTAPI RtlIntegerToUnicodeString (ULONG, ULONG, PUNICODE_STRING);
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@ -968,6 +977,7 @@ extern "C"
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BOOLEAN);
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VOID NTAPI RtlReleasePebLock ();
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VOID NTAPI RtlSecondsSince1970ToTime (ULONG, PLARGE_INTEGER);
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BOOLEAN NTAPI RtlSetCurrentTransaction (HANDLE);
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NTSTATUS NTAPI RtlUnicodeStringToAnsiString (PANSI_STRING, PUNICODE_STRING,
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BOOLEAN);
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NTSTATUS NTAPI RtlUnicodeStringToOemString (PANSI_STRING, PUNICODE_STRING,
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@ -1461,6 +1461,36 @@ rename_append_suffix (path_conv &pc, const char *path, size_t len,
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pc.check (buf, PC_SYM_NOFOLLOW);
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}
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static void
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start_transaction (HANDLE &old_trans, HANDLE &trans)
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{
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NTSTATUS status = NtCreateTransaction (&trans,
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SYNCHRONIZE | TRANSACTION_ALL_ACCESS,
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NULL, NULL, NULL, 0, 0, 0, NULL, NULL);
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if (NT_SUCCESS (status))
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{
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old_trans = RtlGetCurrentTransaction ();
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RtlSetCurrentTransaction (trans);
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}
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else
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{
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debug_printf ("NtCreateTransaction failed, %p", status);
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old_trans = trans = NULL;
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}
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}
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static NTSTATUS
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stop_transaction (NTSTATUS status, HANDLE old_trans, HANDLE trans)
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{
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RtlSetCurrentTransaction (old_trans);
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if (NT_SUCCESS (status))
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status = NtCommitTransaction (trans, TRUE);
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else
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status = NtRollbackTransaction (trans, TRUE);
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NtClose (trans);
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return status;
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}
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extern "C" int
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rename (const char *oldpath, const char *newpath)
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{
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@ -1473,6 +1503,7 @@ rename (const char *oldpath, const char *newpath)
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bool equal_path;
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NTSTATUS status;
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HANDLE fh = NULL, nfh;
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HANDLE old_trans = NULL, trans = NULL;
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OBJECT_ATTRIBUTES attr;
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IO_STATUS_BLOCK io;
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ULONG size;
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@ -1681,6 +1712,13 @@ rename (const char *oldpath, const char *newpath)
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}
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dstpc = (removepc == &newpc) ? &new2pc : &newpc;
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/* Opening the file must be part of the transaction. It's not sufficient
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to call only NtSetInformationFile under the transaction. Therefore we
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have to start the transaction here, if necessary. */
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if (wincap.has_transactions ()
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&& (dstpc->isdir () || dstpc->has_attribute (FILE_ATTRIBUTE_READONLY)))
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start_transaction (old_trans, trans);
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/* DELETE is required to rename a file. */
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status = NtOpenFile (&fh, DELETE, oldpc.get_object_attr (attr, sec_none_nih),
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&io, FILE_SHARE_VALID_FLAGS,
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@ -1789,9 +1827,36 @@ rename (const char *oldpath, const char *newpath)
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existing file, if the permissions of the existing file aren't right.
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Like directories, we have to handle this separately by removing the
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destination before renaming. */
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if (status == STATUS_ACCESS_DENIED && dstpc->exists () && !dstpc->isdir ()
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&& NT_SUCCESS (status = unlink_nt (*dstpc)))
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status = NtSetInformationFile (fh, &io, pfri, size, FileRenameInformation);
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if (status == STATUS_ACCESS_DENIED && dstpc->exists () && !dstpc->isdir ())
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{
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if (wincap.has_transactions () && !trans)
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{
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start_transaction (old_trans, trans);
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/* As mentioned earlier, opening the file must be part of the
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transaction. Therefore we have to reopen the file here if the
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transaction hasn't been started already. Unfortunately we can't
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use the NT "reopen file from existing handle" feature. In that
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case NtOpenFile returns STATUS_TRANSACTIONAL_CONFLICT. We *have*
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to close the handle to the file first, *then* we can re-open it.
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Fortunately nothing has happened yet, so the atomicity of the
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rename functionality is not spoiled. */
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NtClose (fh);
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status = NtOpenFile (&fh, DELETE,
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oldpc.get_object_attr (attr, sec_none_nih),
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&io, FILE_SHARE_VALID_FLAGS,
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FILE_OPEN_FOR_BACKUP_INTENT
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| (oldpc.is_rep_symlink ()
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? FILE_OPEN_REPARSE_POINT : 0));
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if (!NT_SUCCESS (status))
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{
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__seterrno_from_nt_status (status);
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goto out;
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}
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}
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if (NT_SUCCESS (status = unlink_nt (*dstpc)))
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status = NtSetInformationFile (fh, &io, pfri, size,
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FileRenameInformation);
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}
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if (NT_SUCCESS (status))
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{
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if (removepc)
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@ -1804,6 +1869,8 @@ rename (const char *oldpath, const char *newpath)
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out:
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if (fh)
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NtClose (fh);
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if (wincap.has_transactions () && trans)
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stop_transaction (status, old_trans, trans);
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syscall_printf ("%d = rename (%s, %s)", res, oldpath, newpath);
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return res;
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}
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@ -42,6 +42,7 @@ static NO_COPY wincaps wincap_unknown = {
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has_gaa_on_link_prefix:false,
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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};
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static NO_COPY wincaps wincap_nt4 = {
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@ -72,6 +73,7 @@ static NO_COPY wincaps wincap_nt4 = {
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has_gaa_on_link_prefix:false,
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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};
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static NO_COPY wincaps wincap_nt4sp4 = {
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@ -102,6 +104,7 @@ static NO_COPY wincaps wincap_nt4sp4 = {
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has_gaa_on_link_prefix:false,
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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};
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static NO_COPY wincaps wincap_2000 = {
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@ -132,6 +135,7 @@ static NO_COPY wincaps wincap_2000 = {
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has_gaa_on_link_prefix:false,
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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};
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static NO_COPY wincaps wincap_2000sp4 = {
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@ -162,6 +166,7 @@ static NO_COPY wincaps wincap_2000sp4 = {
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has_gaa_on_link_prefix:false,
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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};
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static NO_COPY wincaps wincap_xp = {
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@ -192,6 +197,7 @@ static NO_COPY wincaps wincap_xp = {
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has_gaa_on_link_prefix:false,
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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};
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static NO_COPY wincaps wincap_xpsp1 = {
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@ -222,6 +228,7 @@ static NO_COPY wincaps wincap_xpsp1 = {
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has_gaa_on_link_prefix:false,
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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};
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static NO_COPY wincaps wincap_xpsp2 = {
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@ -252,6 +259,7 @@ static NO_COPY wincaps wincap_xpsp2 = {
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has_gaa_on_link_prefix:false,
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:false,
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has_transactions:false,
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};
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static NO_COPY wincaps wincap_2003 = {
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@ -282,6 +290,7 @@ static NO_COPY wincaps wincap_2003 = {
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has_gaa_on_link_prefix:false,
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supports_all_posix_ai_flags:false,
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has_restricted_stack_args:true,
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has_transactions:false,
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};
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static NO_COPY wincaps wincap_vista = {
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@ -312,6 +321,7 @@ static NO_COPY wincaps wincap_vista = {
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has_gaa_on_link_prefix:true,
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supports_all_posix_ai_flags:true,
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has_restricted_stack_args:false,
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has_transactions:true,
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};
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wincapc wincap __attribute__((section (".cygwin_dll_common"), shared));
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@ -40,6 +40,7 @@ struct wincaps
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unsigned has_gaa_on_link_prefix : 1;
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unsigned supports_all_posix_ai_flags : 1;
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unsigned has_restricted_stack_args : 1;
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unsigned has_transactions : 1;
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};
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class wincapc
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@ -86,6 +87,7 @@ public:
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bool IMPLEMENT (has_gaa_on_link_prefix)
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bool IMPLEMENT (supports_all_posix_ai_flags)
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bool IMPLEMENT (has_restricted_stack_args)
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bool IMPLEMENT (has_transactions)
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#undef IMPLEMENT
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};
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