diff mbox series

[SMB3] move more protocol header definitions to fs/smbfs_common

Message ID CAH2r5muFUWGfK8LTrZA6wFD+XbG51RRM3dNyqEvA4B3mLiAkmA@mail.gmail.com (mailing list archive)
State New, archived
Headers show
Series [SMB3] move more protocol header definitions to fs/smbfs_common | expand

Commit Message

Steve French March 26, 2022, 5:55 p.m. UTC
Move defines for ioctl protocol header and various size to smbfs_common

The definitions for the ioctl SMB3 request and response as well
as length of various fields defined in the protocol documentation
were duplicated in fs/ksmbd and fs/cifs.  Move these to the common
code in fs/smbfs_common/smb2pdu.h

See attached

Comments

Steve French March 26, 2022, 5:59 p.m. UTC | #1
Updated the patch slightly to replace define that had Buffer[0] with Buffer[]

On Sat, Mar 26, 2022 at 12:55 PM Steve French <smfrench@gmail.com> wrote:
>
> Move defines for ioctl protocol header and various size to smbfs_common
>
> The definitions for the ioctl SMB3 request and response as well
> as length of various fields defined in the protocol documentation
> were duplicated in fs/ksmbd and fs/cifs.  Move these to the common
> code in fs/smbfs_common/smb2pdu.h
>
> See attached
>
>
> --
> Thanks,
>
> Steve
Namjae Jeon March 27, 2022, 12:52 a.m. UTC | #2
2022-03-27 2:59 GMT+09:00, Steve French <smfrench@gmail.com>:
> Updated the patch slightly to replace define that had Buffer[0] with
> Buffer[]
Minor nit, We can remove multiple blank lines in the patch.

CHECK: Please don't use multiple blank lines
#390: FILE: fs/smbfs_common/smb2pdu.h:1124:
+
+

Otherwise, Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>

Thanks!
>
> On Sat, Mar 26, 2022 at 12:55 PM Steve French <smfrench@gmail.com> wrote:
>>
>> Move defines for ioctl protocol header and various size to smbfs_common
>>
>> The definitions for the ioctl SMB3 request and response as well
>> as length of various fields defined in the protocol documentation
>> were duplicated in fs/ksmbd and fs/cifs.  Move these to the common
>> code in fs/smbfs_common/smb2pdu.h
>>
>> See attached
>>
>>
>> --
>> Thanks,
>>
>> Steve
>
>
>
> --
> Thanks,
>
> Steve
>
Steve French March 27, 2022, 2:29 a.m. UTC | #3
I think this was removed in the next patch (I don't see the warning,
but presumably it is the blank line before the #endif at the end of
the file?)

On Sat, Mar 26, 2022 at 7:52 PM Namjae Jeon <linkinjeon@kernel.org> wrote:
>
> 2022-03-27 2:59 GMT+09:00, Steve French <smfrench@gmail.com>:
> > Updated the patch slightly to replace define that had Buffer[0] with
> > Buffer[]
> Minor nit, We can remove multiple blank lines in the patch.
>
> CHECK: Please don't use multiple blank lines
> #390: FILE: fs/smbfs_common/smb2pdu.h:1124:
> +
> +
>
> Otherwise, Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>
>
> Thanks!
> >
> > On Sat, Mar 26, 2022 at 12:55 PM Steve French <smfrench@gmail.com> wrote:
> >>
> >> Move defines for ioctl protocol header and various size to smbfs_common
> >>
> >> The definitions for the ioctl SMB3 request and response as well
> >> as length of various fields defined in the protocol documentation
> >> were duplicated in fs/ksmbd and fs/cifs.  Move these to the common
> >> code in fs/smbfs_common/smb2pdu.h
> >>
> >> See attached
> >>
> >>
> >> --
> >> Thanks,
> >>
> >> Steve
> >
> >
> >
> > --
> > Thanks,
> >
> > Steve
> >
Namjae Jeon March 27, 2022, 3:30 a.m. UTC | #4
2022-03-27 11:29 GMT+09:00, Steve French <smfrench@gmail.com>:
> I think this was removed in the next patch (I don't see the warning,
> but presumably it is the blank line before the #endif at the end of
> the file?)

The change below is adding 2 blank lines.

+struct smb2_ioctl_rsp {
+       struct smb2_hdr hdr;
+       __le16 StructureSize; /* Must be 49 */
+       __le16 Reserved;
+       __le32 CtlCode;
+       __u64  PersistentFileId;
+       __u64  VolatileFileId;
+       __le32 InputOffset; /* Reserved MBZ */
+       __le32 InputCount;
+       __le32 OutputOffset;
+       __le32 OutputCount;
+       __le32 Flags;
+       __le32 Reserved2;
+       __u8   Buffer[];
+} __packed;
+
+
 /* Possible InfoType values */

Thanks!

>
> On Sat, Mar 26, 2022 at 7:52 PM Namjae Jeon <linkinjeon@kernel.org> wrote:
>>
>> 2022-03-27 2:59 GMT+09:00, Steve French <smfrench@gmail.com>:
>> > Updated the patch slightly to replace define that had Buffer[0] with
>> > Buffer[]
>> Minor nit, We can remove multiple blank lines in the patch.
>>
>> CHECK: Please don't use multiple blank lines
>> #390: FILE: fs/smbfs_common/smb2pdu.h:1124:
>> +
>> +
>>
>> Otherwise, Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>
>>
>> Thanks!
>> >
>> > On Sat, Mar 26, 2022 at 12:55 PM Steve French <smfrench@gmail.com>
>> > wrote:
>> >>
>> >> Move defines for ioctl protocol header and various size to
>> >> smbfs_common
>> >>
>> >> The definitions for the ioctl SMB3 request and response as well
>> >> as length of various fields defined in the protocol documentation
>> >> were duplicated in fs/ksmbd and fs/cifs.  Move these to the common
>> >> code in fs/smbfs_common/smb2pdu.h
>> >>
>> >> See attached
>> >>
>> >>
>> >> --
>> >> Thanks,
>> >>
>> >> Steve
>> >
>> >
>> >
>> > --
>> > Thanks,
>> >
>> > Steve
>> >
>
>
>
> --
> Thanks,
>
> Steve
>
Steve French March 27, 2022, 4:10 a.m. UTC | #5
ok - fixed it (removed 2nd blank line) in the following patch (patch 2)

On Sat, Mar 26, 2022 at 10:30 PM Namjae Jeon <linkinjeon@kernel.org> wrote:
>
> 2022-03-27 11:29 GMT+09:00, Steve French <smfrench@gmail.com>:
> > I think this was removed in the next patch (I don't see the warning,
> > but presumably it is the blank line before the #endif at the end of
> > the file?)
>
> The change below is adding 2 blank lines.
>
> +struct smb2_ioctl_rsp {
> +       struct smb2_hdr hdr;
> +       __le16 StructureSize; /* Must be 49 */
> +       __le16 Reserved;
> +       __le32 CtlCode;
> +       __u64  PersistentFileId;
> +       __u64  VolatileFileId;
> +       __le32 InputOffset; /* Reserved MBZ */
> +       __le32 InputCount;
> +       __le32 OutputOffset;
> +       __le32 OutputCount;
> +       __le32 Flags;
> +       __le32 Reserved2;
> +       __u8   Buffer[];
> +} __packed;
> +
> +
>  /* Possible InfoType values */
>
> Thanks!
>
> >
> > On Sat, Mar 26, 2022 at 7:52 PM Namjae Jeon <linkinjeon@kernel.org> wrote:
> >>
> >> 2022-03-27 2:59 GMT+09:00, Steve French <smfrench@gmail.com>:
> >> > Updated the patch slightly to replace define that had Buffer[0] with
> >> > Buffer[]
> >> Minor nit, We can remove multiple blank lines in the patch.
> >>
> >> CHECK: Please don't use multiple blank lines
> >> #390: FILE: fs/smbfs_common/smb2pdu.h:1124:
> >> +
> >> +
> >>
> >> Otherwise, Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>
> >>
> >> Thanks!
> >> >
> >> > On Sat, Mar 26, 2022 at 12:55 PM Steve French <smfrench@gmail.com>
> >> > wrote:
> >> >>
> >> >> Move defines for ioctl protocol header and various size to
> >> >> smbfs_common
> >> >>
> >> >> The definitions for the ioctl SMB3 request and response as well
> >> >> as length of various fields defined in the protocol documentation
> >> >> were duplicated in fs/ksmbd and fs/cifs.  Move these to the common
> >> >> code in fs/smbfs_common/smb2pdu.h
> >> >>
> >> >> See attached
> >> >>
> >> >>
> >> >> --
> >> >> Thanks,
> >> >>
> >> >> Steve
> >> >
> >> >
> >> >
> >> > --
> >> > Thanks,
> >> >
> >> > Steve
> >> >
> >
> >
> >
> > --
> > Thanks,
> >
> > Steve
> >
diff mbox series

Patch

From 8f039079be3a813dd39b0e61d8738f80ba9ed3aa Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@microsoft.com>
Date: Sat, 26 Mar 2022 12:47:57 -0500
Subject: [PATCH] smb3: move defines for ioctl protocol header and various size
 to smbfs_common

The definitions for the ioctl SMB3 request and response as well
as length of various fields defined in the protocol documentation
were duplicated in fs/ksmbd and fs/cifs.  Move these to the common
code in fs/smbfs_common/smb2pdu.h

Signed-off-by: Steve French <stfrench@microsoft.com>
---
 fs/cifs/cifsglob.h        |  6 ---
 fs/cifs/cifspdu.h         | 12 ------
 fs/cifs/smb2glob.h        | 11 -----
 fs/cifs/smb2pdu.h         | 41 -------------------
 fs/ksmbd/smb2pdu.c        |  6 +--
 fs/ksmbd/smb2pdu.h        | 70 -------------------------------
 fs/smbfs_common/smb2pdu.h | 86 +++++++++++++++++++++++++++++++++++++++
 7 files changed, 89 insertions(+), 143 deletions(-)

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 48b343d03430..ad3cd6053f4e 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -852,13 +852,7 @@  compare_mid(__u16 mid, const struct smb_hdr *smb)
 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
 
-/*
- * The default wsize is 1M. find_get_pages seems to return a maximum of 256
- * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
- * a single wsize request with a single call.
- */
 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
-#define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
 
 /*
  * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 68b9a436af4b..f214cbeb2a36 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -123,18 +123,6 @@ 
  */
 #define CIFS_SESS_KEY_SIZE (16)
 
-/*
- * Size of the smb3 signing key
- */
-#define SMB3_SIGN_KEY_SIZE (16)
-
-/*
- * Size of the smb3 encryption/decryption key storage.
- * This size is big enough to store any cipher key types.
- */
-#define SMB3_ENC_DEC_KEY_SIZE (32)
-
-#define CIFS_CLIENT_CHALLENGE_SIZE (8)
 #define CIFS_SERVER_CHALLENGE_SIZE (8)
 #define CIFS_HMAC_MD5_HASH_SIZE (16)
 #define CIFS_CPHTXT_SIZE (16)
diff --git a/fs/cifs/smb2glob.h b/fs/cifs/smb2glob.h
index 4125fd113cfb..82e916ad167c 100644
--- a/fs/cifs/smb2glob.h
+++ b/fs/cifs/smb2glob.h
@@ -41,15 +41,4 @@ 
 #define END_OF_CHAIN 4
 #define RELATED_REQUEST 8
 
-#define SMB2_SIGNATURE_SIZE (16)
-#define SMB2_NTLMV2_SESSKEY_SIZE (16)
-#define SMB2_HMACSHA256_SIZE (32)
-#define SMB2_CMACAES_SIZE (16)
-#define SMB3_SIGNKEY_SIZE (16)
-#define SMB3_GCM128_CRYPTKEY_SIZE (16)
-#define SMB3_GCM256_CRYPTKEY_SIZE (32)
-
-/* Maximum buffer size value we can send with 1 credit */
-#define SMB2_MAX_BUFFER_SIZE 65536
-
 #endif	/* _SMB2_GLOB_H */
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 9aa2ab8ca5ae..162f1be886fe 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -141,13 +141,6 @@  struct create_durable {
 	} Data;
 } __packed;
 
-struct create_posix {
-	struct create_context ccontext;
-	__u8	Name[16];
-	__le32  Mode;
-	__u32	Reserved;
-} __packed;
-
 /* See MS-SMB2 2.2.13.2.11 */
 /* Flags */
 #define SMB2_DHANDLE_FLAG_PERSISTENT	0x00000002
@@ -428,40 +421,6 @@  struct duplicate_extents_to_file {
  */
 #define SMB2_IOCTL_IOV_SIZE 2
 
-struct smb2_ioctl_req {
-	struct smb2_hdr hdr;
-	__le16 StructureSize;	/* Must be 57 */
-	__u16 Reserved;
-	__le32 CtlCode;
-	__u64  PersistentFileId; /* opaque endianness */
-	__u64  VolatileFileId; /* opaque endianness */
-	__le32 InputOffset;
-	__le32 InputCount;
-	__le32 MaxInputResponse;
-	__le32 OutputOffset;
-	__le32 OutputCount;
-	__le32 MaxOutputResponse;
-	__le32 Flags;
-	__u32  Reserved2;
-	__u8   Buffer[];
-} __packed;
-
-struct smb2_ioctl_rsp {
-	struct smb2_hdr hdr;
-	__le16 StructureSize;	/* Must be 57 */
-	__u16 Reserved;
-	__le32 CtlCode;
-	__u64  PersistentFileId; /* opaque endianness */
-	__u64  VolatileFileId; /* opaque endianness */
-	__le32 InputOffset;
-	__le32 InputCount;
-	__le32 OutputOffset;
-	__le32 OutputCount;
-	__le32 Flags;
-	__u32  Reserved2;
-	/* char * buffer[] */
-} __packed;
-
 #define SMB2_LOCKFLAG_SHARED_LOCK	0x0001
 #define SMB2_LOCKFLAG_EXCLUSIVE_LOCK	0x0002
 #define SMB2_LOCKFLAG_UNLOCK		0x0004
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index 5440d61cea9f..e7eb835648f8 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -7581,7 +7581,7 @@  int smb2_ioctl(struct ksmbd_work *work)
 		goto out;
 	}
 
-	cnt_code = le32_to_cpu(req->CntCode);
+	cnt_code = le32_to_cpu(req->CtlCode);
 	ret = smb2_calc_max_out_buf_len(work, 48,
 					le32_to_cpu(req->MaxOutputResponse));
 	if (ret < 0) {
@@ -7687,7 +7687,7 @@  int smb2_ioctl(struct ksmbd_work *work)
 		rsp->PersistentFileId = req->PersistentFileId;
 		fsctl_copychunk(work,
 				(struct copychunk_ioctl_req *)&req->Buffer[0],
-				le32_to_cpu(req->CntCode),
+				le32_to_cpu(req->CtlCode),
 				le32_to_cpu(req->InputCount),
 				req->VolatileFileId,
 				req->PersistentFileId,
@@ -7841,7 +7841,7 @@  int smb2_ioctl(struct ksmbd_work *work)
 		goto out;
 	}
 
-	rsp->CntCode = cpu_to_le32(cnt_code);
+	rsp->CtlCode = cpu_to_le32(cnt_code);
 	rsp->InputCount = cpu_to_le32(0);
 	rsp->InputOffset = cpu_to_le32(112);
 	rsp->OutputOffset = cpu_to_le32(112);
diff --git a/fs/ksmbd/smb2pdu.h b/fs/ksmbd/smb2pdu.h
index bf1f82d8596d..fd05d3a1eda1 100644
--- a/fs/ksmbd/smb2pdu.h
+++ b/fs/ksmbd/smb2pdu.h
@@ -16,42 +16,13 @@ 
 #define FILE_CREATED           0x00000002
 #define FILE_OVERWRITTEN       0x00000003
 
-/*
- * Size of the session key (crypto key encrypted with the password
- */
-#define SMB2_NTLMV2_SESSKEY_SIZE	16
-#define SMB2_SIGNATURE_SIZE		16
-#define SMB2_HMACSHA256_SIZE		32
-#define SMB2_CMACAES_SIZE		16
-#define SMB3_GCM128_CRYPTKEY_SIZE	16
-#define SMB3_GCM256_CRYPTKEY_SIZE	32
-
-/*
- * Size of the smb3 encryption/decryption keys
- */
-#define SMB3_ENC_DEC_KEY_SIZE		32
-
-/*
- * Size of the smb3 signing key
- */
-#define SMB3_SIGN_KEY_SIZE		16
-
-#define CIFS_CLIENT_CHALLENGE_SIZE	8
-#define SMB_SERVER_CHALLENGE_SIZE	8
-
 /* SMB2 Max Credits */
 #define SMB2_MAX_CREDITS		8192
 
-/* Maximum buffer size value we can send with 1 credit */
-#define SMB2_MAX_BUFFER_SIZE 65536
-
-#define NUMBER_OF_SMB2_COMMANDS	0x0013
-
 /* BB FIXME - analyze following length BB */
 #define MAX_SMB2_HDR_SIZE 0x78 /* 4 len + 64 hdr + (2*24 wct) + 2 bct + 2 pad */
 
 #define SMB21_DEFAULT_IOSIZE	(1024 * 1024)
-#define SMB3_DEFAULT_IOSIZE	(4 * 1024 * 1024)
 #define SMB3_DEFAULT_TRANS_SIZE	(1024 * 1024)
 #define SMB3_MIN_IOSIZE	(64 * 1024)
 #define SMB3_MAX_IOSIZE	(8 * 1024 * 1024)
@@ -149,13 +120,6 @@  struct create_alloc_size_req {
 	__le64 AllocationSize;
 } __packed;
 
-struct create_posix {
-	struct create_context ccontext;
-	__u8    Name[16];
-	__le32  Mode;
-	__u32   Reserved;
-} __packed;
-
 struct create_durable_rsp {
 	struct create_context ccontext;
 	__u8   Name[8];
@@ -213,40 +177,6 @@  struct duplicate_extents_to_file {
 	__le64 ByteCount;  /* Bytes to be copied */
 } __packed;
 
-struct smb2_ioctl_req {
-	struct smb2_hdr hdr;
-	__le16 StructureSize; /* Must be 57 */
-	__le16 Reserved; /* offset from start of SMB2 header to write data */
-	__le32 CntCode;
-	__u64  PersistentFileId;
-	__u64  VolatileFileId;
-	__le32 InputOffset; /* Reserved MBZ */
-	__le32 InputCount;
-	__le32 MaxInputResponse;
-	__le32 OutputOffset;
-	__le32 OutputCount;
-	__le32 MaxOutputResponse;
-	__le32 Flags;
-	__le32 Reserved2;
-	__u8   Buffer[1];
-} __packed;
-
-struct smb2_ioctl_rsp {
-	struct smb2_hdr hdr;
-	__le16 StructureSize; /* Must be 49 */
-	__le16 Reserved; /* offset from start of SMB2 header to write data */
-	__le32 CntCode;
-	__u64  PersistentFileId;
-	__u64  VolatileFileId;
-	__le32 InputOffset; /* Reserved MBZ */
-	__le32 InputCount;
-	__le32 OutputOffset;
-	__le32 OutputCount;
-	__le32 Flags;
-	__le32 Reserved2;
-	__u8   Buffer[1];
-} __packed;
-
 struct validate_negotiate_info_req {
 	__le32 Capabilities;
 	__u8   Guid[SMB2_CLIENT_GUID_SIZE];
diff --git a/fs/smbfs_common/smb2pdu.h b/fs/smbfs_common/smb2pdu.h
index c21ecc4806f1..d270c76050b1 100644
--- a/fs/smbfs_common/smb2pdu.h
+++ b/fs/smbfs_common/smb2pdu.h
@@ -60,6 +60,40 @@ 
 
 #define NUMBER_OF_SMB2_COMMANDS	0x0013
 
+/*
+ * Size of the session key (crypto key encrypted with the password
+ */
+#define SMB2_NTLMV2_SESSKEY_SIZE	16
+#define SMB2_SIGNATURE_SIZE		16
+#define SMB2_HMACSHA256_SIZE		32
+#define SMB2_CMACAES_SIZE		16
+#define SMB3_GCM128_CRYPTKEY_SIZE	16
+#define SMB3_GCM256_CRYPTKEY_SIZE	32
+
+/*
+ * Size of the smb3 encryption/decryption keys
+ * This size is big enough to store any cipher key types.
+ */
+#define SMB3_ENC_DEC_KEY_SIZE		32
+
+/*
+ * Size of the smb3 signing key
+ */
+#define SMB3_SIGN_KEY_SIZE		16
+
+#define CIFS_CLIENT_CHALLENGE_SIZE	8
+
+/* Maximum buffer size value we can send with 1 credit */
+#define SMB2_MAX_BUFFER_SIZE 65536
+
+/*
+ * The default wsize is 1M for SMB2 (and for some CIFS cases).
+ * find_get_pages seems to return a maximum of 256
+ * pages in a single call. With PAGE_SIZE == 4k, this means we can
+ * fill a single wsize request with a single call.
+ */
+#define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
+
 /*
  * SMB2 Header Definition
  *
@@ -88,6 +122,15 @@ 
 #define SMB2_FLAGS_DFS_OPERATIONS	cpu_to_le32(0x10000000)
 #define SMB2_FLAGS_REPLAY_OPERATION	cpu_to_le32(0x20000000) /* SMB3 & up */
 
+/*
+ *	Definitions for SMB2 Protocol Data Units (network frames)
+ *
+ *  See MS-SMB2.PDF specification for protocol details.
+ *  The Naming convention is the lower case version of the SMB2
+ *  command code name for the struct. Note that structures must be packed.
+ *
+ */
+
 /* See MS-SMB2 section 2.2.1 */
 struct smb2_hdr {
 	__le32 ProtocolId;	/* 0xFE 'S' 'M' 'B' */
@@ -997,6 +1040,13 @@  struct smb2_create_rsp {
 	__u8   Buffer[1];
 } __packed;
 
+struct create_posix {
+	struct create_context ccontext;
+	__u8    Name[16];
+	__le32  Mode;
+	__u32   Reserved;
+} __packed;
+
 #define SMB2_LEASE_NONE_LE			cpu_to_le32(0x00)
 #define SMB2_LEASE_READ_CACHING_LE		cpu_to_le32(0x01)
 #define SMB2_LEASE_HANDLE_CACHING_LE		cpu_to_le32(0x02)
@@ -1036,6 +1086,42 @@  struct create_lease_v2 {
 	__u8   Pad[4];
 } __packed;
 
+/* See MS-SMB2 2.2.31 and 2.2.32 */
+struct smb2_ioctl_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* Must be 57 */
+	__le16 Reserved; /* offset from start of SMB2 header to write data */
+	__le32 CtlCode;
+	__u64  PersistentFileId;
+	__u64  VolatileFileId;
+	__le32 InputOffset; /* Reserved MBZ */
+	__le32 InputCount;
+	__le32 MaxInputResponse;
+	__le32 OutputOffset;
+	__le32 OutputCount;
+	__le32 MaxOutputResponse;
+	__le32 Flags;
+	__le32 Reserved2;
+	__u8   Buffer[];
+} __packed;
+
+struct smb2_ioctl_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* Must be 49 */
+	__le16 Reserved;
+	__le32 CtlCode;
+	__u64  PersistentFileId;
+	__u64  VolatileFileId;
+	__le32 InputOffset; /* Reserved MBZ */
+	__le32 InputCount;
+	__le32 OutputOffset;
+	__le32 OutputCount;
+	__le32 Flags;
+	__le32 Reserved2;
+	__u8   Buffer[0];
+} __packed;
+
+
 /* Possible InfoType values */
 #define SMB2_O_INFO_FILE	0x01
 #define SMB2_O_INFO_FILESYSTEM	0x02
-- 
2.32.0