s3: libsmb: Add cli_smb2_ftruncate(), plumb into cli_ftruncate().

[samba.git] / source3 / libsmb / cli_smb2_fnum.c

diff --git a/source3/libsmb/cli_smb2_fnum.c b/source3/libsmb/cli_smb2_fnum.c
index 266f2d32fd7c2fcd8c0c9583802b218c75720fc4..848e077162ca1ad5843e5796a4590d739d588372 100644 (file)
--- a/source3/libsmb/cli_smb2_fnum.c
+++ b/source3/libsmb/cli_smb2_fnum.c
@@ -3574,3 +3574,68 @@ NTSTATUS cli_smb2_shadow_copy_data(TALLOC_CTX *mem_ctx,
        TALLOC_FREE(frame);
        return status;
 }
+
+/***************************************************************
+ Wrapper that allows SMB2 to truncate a file.
+ Synchronous only.
+***************************************************************/
+
+NTSTATUS cli_smb2_ftruncate(struct cli_state *cli,
+                       uint16_t fnum,
+                       uint64_t newsize)
+{
+       NTSTATUS status;
+       DATA_BLOB inbuf = data_blob_null;
+       struct smb2_hnd *ph = NULL;
+       TALLOC_CTX *frame = talloc_stackframe();
+
+       if (smbXcli_conn_has_async_calls(cli->conn)) {
+               /*
+                * Can't use sync call while an async call is in flight
+                */
+               status = NT_STATUS_INVALID_PARAMETER;
+               goto fail;
+       }
+
+       if (smbXcli_conn_protocol(cli->conn) < PROTOCOL_SMB2_02) {
+               status = NT_STATUS_INVALID_PARAMETER;
+               goto fail;
+       }
+
+       status = map_fnum_to_smb2_handle(cli,
+                                       fnum,
+                                       &ph);
+       if (!NT_STATUS_IS_OK(status)) {
+               goto fail;
+       }
+
+       inbuf = data_blob_talloc_zero(frame, 8);
+       if (inbuf.data == NULL) {
+               status = NT_STATUS_NO_MEMORY;
+               goto fail;
+       }
+
+       SBVAL(inbuf.data, 0, newsize);
+
+       /* setinfo on the handle with info_type SMB2_SETINFO_FILE (1),
+          level 20 (SMB_FILE_END_OF_FILE_INFORMATION - 1000). */
+
+       status = smb2cli_set_info(cli->conn,
+                               cli->timeout,
+                               cli->smb2.session,
+                               cli->smb2.tcon,
+                               1, /* in_info_type */
+                                       /* in_file_info_class */
+                               SMB_FILE_END_OF_FILE_INFORMATION - 1000,
+                               &inbuf, /* in_input_buffer */
+                               0, /* in_additional_info */
+                               ph->fid_persistent,
+                               ph->fid_volatile);
+
+  fail:
+
+       cli->raw_status = status;
+
+       TALLOC_FREE(frame);
+       return status;
+}