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authorSteve French <stfrench@microsoft.com>2022-03-26 20:47:57 +0300
committerSteve French <stfrench@microsoft.com>2022-03-27 07:09:20 +0300
commit15e7b6d753b815b19b375dcd4593534c0f157c66 (patch)
treeae2537f896a392b33de75b5ef33c7b2f8ca28a3c /fs/smbfs_common/smb2pdu.h
parent113be37d87449836ebbca4ca2909dc4e1db9663d (diff)
downloadlinux-15e7b6d753b815b19b375dcd4593534c0f157c66.tar.xz
smb3: move defines for ioctl protocol header and SMB2 sizes 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 Reviewed-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/smbfs_common/smb2pdu.h')
-rw-r--r--fs/smbfs_common/smb2pdu.h85
1 files changed, 85 insertions, 0 deletions
diff --git a/fs/smbfs_common/smb2pdu.h b/fs/smbfs_common/smb2pdu.h
index c21ecc4806f1..67b41f083025 100644
--- a/fs/smbfs_common/smb2pdu.h
+++ b/fs/smbfs_common/smb2pdu.h
@@ -61,6 +61,40 @@
#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
*
* "MBZ" : Must be Zero
@@ -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 +1086,41 @@ 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[];
+} __packed;
+
/* Possible InfoType values */
#define SMB2_O_INFO_FILE 0x01
#define SMB2_O_INFO_FILESYSTEM 0x02