linux-kernel - [PATCH v4 23/24] smb: move resume_key_ioctl

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251027072206.3468578-9-chenxiaosong.chenxiaosong@linux.dev>
Date: Mon, 27 Oct 2025 15:22:05 +0800
From: chenxiaosong.chenxiaosong@...ux.dev
To: sfrench@...ba.org,
	smfrench@...il.com,
	linkinjeon@...nel.org,
	linkinjeon@...ba.org,
	christophe.jaillet@...adoo.fr
Cc: linux-cifs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	ZhangGuoDong <zhangguodong@...inos.cn>,
	ChenXiaoSong <chenxiaosong@...inos.cn>
Subject: [PATCH v4 23/24] smb: move resume_key_ioctl_rsp to common/smb2pdu.h

From: ZhangGuoDong <zhangguodong@...inos.cn>

Rename 2 places:

  - resume_key_req -> resume_key_ioctl_rsp
  - server: ResumeKey -> ResumeKeyU64

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

Co-developed-by: ChenXiaoSong <chenxiaosong@...inos.cn>
Signed-off-by: ChenXiaoSong <chenxiaosong@...inos.cn>
Signed-off-by: ZhangGuoDong <zhangguodong@...inos.cn>
---
 fs/smb/client/smb2ops.c |  4 ++--
 fs/smb/client/smb2pdu.h |  6 ------
 fs/smb/common/smb2pdu.h | 10 ++++++++++
 fs/smb/server/smb2pdu.c |  4 ++--
 fs/smb/server/smb2pdu.h |  6 ------
 5 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
index a2319eef2801..80191bf3fdff 100644
--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -1528,7 +1528,7 @@ SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 {
 	int rc;
 	unsigned int ret_data_len;
-	struct resume_key_req *res_key;
+	struct resume_key_ioctl_rsp *res_key;
 
 	rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 			FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
@@ -1541,7 +1541,7 @@ SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 		cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 		goto req_res_key_exit;
 	}
-	if (ret_data_len < sizeof(struct resume_key_req)) {
+	if (ret_data_len < sizeof(struct resume_key_ioctl_rsp)) {
 		cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
 		rc = -EINVAL;
 		goto req_res_key_exit;
diff --git a/fs/smb/client/smb2pdu.h b/fs/smb/client/smb2pdu.h
index f8aa4bcc5eac..0fcc903fbcd1 100644
--- a/fs/smb/client/smb2pdu.h
+++ b/fs/smb/client/smb2pdu.h
@@ -158,12 +158,6 @@ struct crt_sd_ctxt {
 	struct smb3_sd sd;
 } __packed;
 
-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;
-
 /* See MS-FSCC 2.3.29 and 2.3.30 */
 struct get_retrieval_pointer_count_req {
 	__le64 StartingVcn; /* virtual cluster number (signed) */
diff --git a/fs/smb/common/smb2pdu.h b/fs/smb/common/smb2pdu.h
index 319890c6d46b..c7e64712f856 100644
--- a/fs/smb/common/smb2pdu.h
+++ b/fs/smb/common/smb2pdu.h
@@ -1453,6 +1453,16 @@ struct copychunk_ioctl_rsp {
 	__le32 TotalBytesWritten;
 } __packed;
 
+/* See MS-SMB2 2.2.32.3 */
+struct resume_key_ioctl_rsp {
+	union {
+		char ResumeKey[COPY_CHUNK_RES_KEY_SIZE];
+		__u64 ResumeKeyU64[3];
+	};
+	__le32	ContextLength;	/* MBZ */
+	char	Context[];	/* ignored, Windows sets to 4 bytes of zero */
+} __packed;
+
 struct smb2_ioctl_rsp {
 	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 49 */
diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
index 44e2cef70f27..96e50dd7d64f 100644
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -8122,8 +8122,8 @@ static int fsctl_request_resume_key(struct ksmbd_work *work,
 		return -ENOENT;
 
 	memset(key_rsp, 0, sizeof(*key_rsp));
-	key_rsp->ResumeKey[0] = req->VolatileFileId;
-	key_rsp->ResumeKey[1] = req->PersistentFileId;
+	key_rsp->ResumeKeyU64[0] = req->VolatileFileId;
+	key_rsp->ResumeKeyU64[1] = req->PersistentFileId;
 	ksmbd_fd_put(work, fp);
 
 	return 0;
diff --git a/fs/smb/server/smb2pdu.h b/fs/smb/server/smb2pdu.h
index ab4359f384b3..a6940e971047 100644
--- a/fs/smb/server/smb2pdu.h
+++ b/fs/smb/server/smb2pdu.h
@@ -130,12 +130,6 @@ struct file_object_buf_type1_ioctl_rsp {
 	__u8 DomainId[16];
 } __packed;
 
-struct resume_key_ioctl_rsp {
-	__u64 ResumeKey[3];
-	__le32 ContextLength;
-	__u8 Context[4]; /* ignored, Windows sets to 4 bytes of zero */
-} __packed;
-
 struct file_sparse {
 	__u8	SetSparse;
 } __packed;
-- 
2.43.0