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cifs: Add support for FSCTL passthrough that write data to the server

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Add support to pass a blob to the server in FSCTL passthrough.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2019-04-11 12:20:17 +10:00 committed by Steve French
parent 0ae3fa4dc1
commit efac779b1c
2 changed files with 42 additions and 2 deletions
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17
fs/cifs/smb2ops.c
View File

@ -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
fs/cifs/smbfsctl.h
View File

@ -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