smb: move copychunk definitions to common/smb2pdu.h

Rename 3 places:

  - copychunk_ioctl -> copychunk_ioctl_req
  - copychunk -> srv_copychunk
  - server: ResumeKey -> SourceKeyU64

Merge the struct members of the server and the client, then move duplicate
definitions to common header file.

Co-developed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: ZhangGuoDong <zhangguodong@kylinos.cn>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: ZhangGuoDong

fs/smb/client/cifspdu.h

@@ -1323,14 +1323,6 @@ typedef struct smb_com_ntransact_rsp {
 	/* parms and data follow */
 } __attribute__((packed)) NTRANSACT_RSP;
 
-/* See MS-SMB 2.2.7.2.1.1 */
-struct srv_copychunk {
-	__le64 SourceOffset;
-	__le64 DestinationOffset;
-	__le32 CopyLength;
-	__u32  Reserved;
-} __packed;
-
 typedef struct smb_com_transaction_ioctl_req {
 	struct smb_hdr hdr;	/* wct = 23 */
 	__u8 MaxSetupCount;

fs/smb/client/smb2ops.c

@@ -1524,7 +1524,7 @@ smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
 static int
 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 		     u64 persistent_fid, u64 volatile_fid,
-		     struct copychunk_ioctl *pcchunk)
+		     struct copychunk_ioctl_req *pcchunk)
 {
 	int rc;
 	unsigned int ret_data_len;
@@ -1857,10 +1857,10 @@ smb2_copychunk_range(const unsigned int xid,
 {
 	int rc = 0;
 	unsigned int ret_data_len = 0;
-	struct copychunk_ioctl *cc_req = NULL;
+	struct copychunk_ioctl_req *cc_req = NULL;
 	struct copychunk_ioctl_rsp *cc_rsp = NULL;
 	struct cifs_tcon *tcon;
-	struct copychunk *chunk;
+	struct srv_copychunk *chunk;
 	u32 chunks, chunk_count, chunk_bytes;
 	u32 copy_bytes, copy_bytes_left;
 	u32 chunks_written, bytes_written;

fs/smb/client/smb2pdu.h

@@ -193,36 +193,12 @@ struct crt_sd_ctxt {
 	struct smb3_sd sd;
 } __packed;
 
-
-#define COPY_CHUNK_RES_KEY_SIZE	24
 struct resume_key_req {
 	char ResumeKey[COPY_CHUNK_RES_KEY_SIZE];
 	__le32	ContextLength;	/* MBZ */
 	char	Context[];	/* ignored, Windows sets to 4 bytes of zero */
 } __packed;
 
-
-struct copychunk {
-	__le64 SourceOffset;
-	__le64 TargetOffset;
-	__le32 Length;
-	__le32 Reserved;
-} __packed;
-
-/* this goes in the ioctl buffer when doing a copychunk request */
-struct copychunk_ioctl {
-	char SourceKey[COPY_CHUNK_RES_KEY_SIZE];
-	__le32 ChunkCount;
-	__le32 Reserved;
-	struct copychunk Chunks[];
-} __packed;
-
-struct copychunk_ioctl_rsp {
-	__le32 ChunksWritten;
-	__le32 ChunkBytesWritten;
-	__le32 TotalBytesWritten;
-} __packed;
-
 /* See MS-FSCC 2.3.29 and 2.3.30 */
 struct get_retrieval_pointer_count_req {
 	__le64 StartingVcn; /* virtual cluster number (signed) */

fs/smb/common/smb2pdu.h

@@ -1388,6 +1388,35 @@ struct smb2_ioctl_req {
 	__u8   Buffer[];
 } __packed;
 
+/* See MS-SMB2 2.2.31.1.1 */
+struct srv_copychunk {
+	__le64 SourceOffset;
+	__le64 TargetOffset;
+	__le32 Length;
+	__le32 Reserved;
+} __packed;
+
+#define COPY_CHUNK_RES_KEY_SIZE	24
+
+/* See MS-SMB2 2.2.31.1 */
+/* this goes in the ioctl buffer when doing a copychunk request */
+struct copychunk_ioctl_req {
+	union {
+		char SourceKey[COPY_CHUNK_RES_KEY_SIZE];
+		__le64 SourceKeyU64[3];
+	};
+	__le32 ChunkCount;
+	__le32 Reserved;
+	struct srv_copychunk Chunks[] __counted_by_le(ChunkCount);
+} __packed;
+
+/* See MS-SMB2 2.2.32.1 */
+struct copychunk_ioctl_rsp {
+	__le32 ChunksWritten;
+	__le32 ChunkBytesWritten;
+	__le32 TotalBytesWritten;
+} __packed;
+
 struct smb2_ioctl_rsp {
 	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 49 */

fs/smb/server/smb2pdu.c

@@ -7754,11 +7754,11 @@ static int fsctl_copychunk(struct ksmbd_work *work,
 	}
 
 	src_fp = ksmbd_lookup_foreign_fd(work,
-					 le64_to_cpu(ci_req->ResumeKey[0]));
+					 le64_to_cpu(ci_req->SourceKeyU64[0]));
 	dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
 	ret = -EINVAL;
 	if (!src_fp ||
-	    src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
+	    src_fp->persistent_id != le64_to_cpu(ci_req->SourceKeyU64[1])) {
 		rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
 		goto out;
 	}

fs/smb/server/smb2pdu.h

@@ -174,26 +174,6 @@ struct resume_key_ioctl_rsp {
 	__u8 Context[4]; /* ignored, Windows sets to 4 bytes of zero */
 } __packed;
 
-struct srv_copychunk {
-	__le64 SourceOffset;
-	__le64 TargetOffset;
-	__le32 Length;
-	__le32 Reserved;
-} __packed;
-
-struct copychunk_ioctl_req {
-	__le64 ResumeKey[3];
-	__le32 ChunkCount;
-	__le32 Reserved;
-	struct srv_copychunk Chunks[] __counted_by_le(ChunkCount);
-} __packed;
-
-struct copychunk_ioctl_rsp {
-	__le32 ChunksWritten;
-	__le32 ChunkBytesWritten;
-	__le32 TotalBytesWritten;
-} __packed;
-
 struct file_sparse {
 	__u8	SetSparse;
 } __packed;