cifs: Add support for FSCTL passthrough that write data to the server (efac779b) · Commits · 戴 / test

fs/cifs/smb2ops.c

+15 −2

Original line number	Diff line number	Diff line
		@@ -1382,6 +1382,18 @@ smb2_ioctl_query_info(const unsigned int xid,
		oparms.fid = &fid;
		oparms.reconnect = false;

		/*
		* FSCTL codes encode the special access they need in the fsctl code.
		*/
		if (qi.flags & PASSTHRU_FSCTL) {
		switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
		case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
		oparms.desired_access = FILE_READ_DATA \| FILE_WRITE_DATA \| FILE_READ_ATTRIBUTES \| SYNCHRONIZE;
		;
		break;
		}
		}

		rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
		if (rc)
		goto iqinf_exit;
		@@ -1399,8 +1411,9 @@ smb2_ioctl_query_info(const unsigned int xid,

		rc = SMB2_ioctl_init(tcon, &rqst[1],
		COMPOUND_FID, COMPOUND_FID,
		qi.info_type, true, NULL,
		0, CIFSMaxBufSize);
		qi.info_type, true, buffer,
		qi.output_buffer_length,
		CIFSMaxBufSize);
		}
		} else if (qi.flags == PASSTHRU_QUERY_INFO) {
		memset(&qi_iov, 0, sizeof(qi_iov));

+27 −0

Original line number	Diff line number	Diff line
		@@ -35,6 +35,33 @@
		* below). Additional detail on less common ones can be found in MS-FSCC
		* section 2.3.
		*/

		/*
		* FSCTL values are 32 bits and are constructed as
		* <device 16bits> <access 2bits> <function 12bits> <method 2bits>
		*/
		/* Device */
		#define FSCTL_DEVICE_DFS (0x0006 << 16)
		#define FSCTL_DEVICE_FILE_SYSTEM (0x0009 << 16)
		#define FSCTL_DEVICE_NAMED_PIPE (0x0011 << 16)
		#define FSCTL_DEVICE_NETWORK_FILE_SYSTEM (0x0014 << 16)
		#define FSCTL_DEVICE_MASK 0xffff0000
		/* Access */
		#define FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS (0x00 << 14)
		#define FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS (0x01 << 14)
		#define FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS (0x02 << 14)
		#define FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS (0x03 << 14)
		#define FSCTL_DEVICE_ACCESS_MASK 0x0000c000
		/* Function */
		#define FSCTL_DEVICE_FUNCTION_MASK 0x00003ffc
		/* Method */
		#define FSCTL_DEVICE_METHOD_BUFFERED 0x00
		#define FSCTL_DEVICE_METHOD_IN_DIRECT 0x01
		#define FSCTL_DEVICE_METHOD_OUT_DIRECT 0x02
		#define FSCTL_DEVICE_METHOD_NEITHER 0x03
		#define FSCTL_DEVICE_METHOD_MASK 0x00000003


		#define FSCTL_DFS_GET_REFERRALS 0x00060194
		#define FSCTL_DFS_GET_REFERRALS_EX 0x000601B0
		#define FSCTL_REQUEST_OPLOCK_LEVEL_1 0x00090000