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authorRonnie Sahlberg <lsahlber@redhat.com>2019-04-11 04:20:17 +0200
committerSteve French <stfrench@microsoft.com>2019-05-08 06:24:55 +0200
commitefac779b1c69670ed1e5ab84123ccc2c14e082f0 (patch)
tree01dd40bc81dd1dcc88e01d8a42764cb77cb1dfea /fs/cifs
parentcifs: remove superfluous inode_lock in cifs_{strict_}fsync (diff)
downloadlinux-efac779b1c69670ed1e5ab84123ccc2c14e082f0.tar.xz
linux-efac779b1c69670ed1e5ab84123ccc2c14e082f0.zip
cifs: Add support for FSCTL passthrough that write data to the server
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>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/smb2ops.c17
-rw-r--r--fs/cifs/smbfsctl.h27
2 files changed, 42 insertions, 2 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index ab4737e3c31f..ed8c2ba9590b 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -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));
diff --git a/fs/cifs/smbfsctl.h b/fs/cifs/smbfsctl.h
index f996daeea271..9b3459b9a5ce 100644
--- a/fs/cifs/smbfsctl.h
+++ b/fs/cifs/smbfsctl.h
@@ -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