linux-kernel - Re: [PATCH v3 07/22] smb: move some duplicate definitions to common/smb2pdu.h

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Message-ID: <CAKYAXd-ZuVzN9zFLtdmm7Kzh_wYUV_vAj4G=-evw80rLmBrrdQ@mail.gmail.com>
Date: Mon, 27 Oct 2025 08:17:33 +0900
From: Namjae Jeon <linkinjeon@...nel.org>
To: ChenXiaoSong <chenxiaosong.chenxiaosong@...ux.dev>
Cc: stfrench@...rosoft.com, metze@...ba.org, pali@...nel.org, 
	smfrench@...il.com, sfrench@...ba.org, senozhatsky@...omium.org, 
	tom@...pey.com, pc@...guebit.org, ronniesahlberg@...il.com, 
	sprasad@...rosoft.com, bharathsm@...rosoft.com, christophe.jaillet@...adoo.fr, 
	zhangguodong@...inos.cn, linux-cifs@...r.kernel.org, 
	linux-kernel@...r.kernel.org, ChenXiaoSong <chenxiaosong@...inos.cn>
Subject: Re: [PATCH v3 07/22] smb: move some duplicate definitions to common/smb2pdu.h

On Sun, Oct 26, 2025 at 6:21 PM ChenXiaoSong
<chenxiaosong.chenxiaosong@...ux.dev> wrote:
>
> Hi Namjae,
Hi Chen,
>
> I'm confused by what this sentence means: "I prefer moving it when the
> durable handle structures are moved to /common later.".
>
> What does "it" refer to? Does "it" refer to the whole patch, or only to
> "SMB2_DHANDLE_FLAG_PERSISTENT"?
Only SMB2_DHANDLE_FLAG_PERSISTENT.

Thanks!
>
> On 10/20/25 12:52 PM, Namjae Jeon wrote:
> > On Tue, Oct 14, 2025 at 4:21 PM <chenxiaosong.chenxiaosong@...ux.dev> wrote:
> >>
> >> From: ZhangGuoDong <zhangguodong@...inos.cn>
> >>
> >> In order to maintain the code more easily, move duplicate definitions to
> >> new 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/smb2pdu.h | 24 +++---------------------
> >>   fs/smb/common/smb2pdu.h | 24 ++++++++++++++++++++++++
> >>   fs/smb/server/smb2pdu.c |  8 ++++----
> >>   fs/smb/server/smb2pdu.h | 17 -----------------
> >>   4 files changed, 31 insertions(+), 42 deletions(-)
> >>
> >> diff --git a/fs/smb/client/smb2pdu.h b/fs/smb/client/smb2pdu.h
> >> index 101024f8f725..c013560bcfa1 100644
> >> --- a/fs/smb/client/smb2pdu.h
> >> +++ b/fs/smb/client/smb2pdu.h
> >> @@ -135,11 +135,9 @@ struct share_redirect_error_context_rsp {
> >>
> >>
> >>   /* See MS-SMB2 2.2.13.2.11 */
> >> -/* Flags */
> >> -#define SMB2_DHANDLE_FLAG_PERSISTENT   0x00000002
> >>   struct durable_context_v2 {
> >>          __le32 Timeout;
> >> -       __le32 Flags;
> >> +       __le32 Flags; /* see SMB2_DHANDLE_FLAG_PERSISTENT */
> >>          __u64 Reserved;
> >>          __u8 CreateGuid[16];
> >>   } __packed;
> >> @@ -157,13 +155,13 @@ struct durable_reconnect_context_v2 {
> >>                  __u64 VolatileFileId;
> >>          } Fid;
> >>          __u8 CreateGuid[16];
> >> -       __le32 Flags; /* see above DHANDLE_FLAG_PERSISTENT */
> >> +       __le32 Flags; /* see SMB2_DHANDLE_FLAG_PERSISTENT */
> >>   } __packed;
> >>
> >>   /* See MS-SMB2 2.2.14.2.12 */
> >>   struct durable_reconnect_context_v2_rsp {
> >>          __le32 Timeout;
> >> -       __le32 Flags; /* see above DHANDLE_FLAG_PERSISTENT */
> >> +       __le32 Flags; /* see SMB2_DHANDLE_FLAG_PERSISTENT */
> >>   } __packed;
> >>
> >>   struct create_durable_handle_reconnect_v2 {
> >> @@ -263,22 +261,6 @@ struct network_resiliency_req {
> >>   } __packed;
> >>   /* There is no buffer for the response ie no struct network_resiliency_rsp */
> >>
> >> -#define RSS_CAPABLE    cpu_to_le32(0x00000001)
> >> -#define RDMA_CAPABLE   cpu_to_le32(0x00000002)
> >> -
> >> -#define INTERNETWORK   cpu_to_le16(0x0002)
> >> -#define INTERNETWORKV6 cpu_to_le16(0x0017)
> >> -
> >> -struct network_interface_info_ioctl_rsp {
> >> -       __le32 Next; /* next interface. zero if this is last one */
> >> -       __le32 IfIndex;
> >> -       __le32 Capability; /* RSS or RDMA Capable */
> >> -       __le32 Reserved;
> >> -       __le64 LinkSpeed;
> >> -       __le16 Family;
> >> -       __u8 Buffer[126];
> >> -} __packed;
> >> -
> >>   struct iface_info_ipv4 {
> >>          __be16 Port;
> >>          __be32 IPv4Address;
> >> diff --git a/fs/smb/common/smb2pdu.h b/fs/smb/common/smb2pdu.h
> >> index f79a5165a7cc..25e8ece283c4 100644
> >> --- a/fs/smb/common/smb2pdu.h
> >> +++ b/fs/smb/common/smb2pdu.h
> >> @@ -1290,6 +1290,10 @@ struct create_mxac_req {
> >>          __le64 Timestamp;
> >>   } __packed;
> >>
> >> +/* See MS-SMB2 2.2.13.2.11 and MS-SMB2 2.2.13.2.12 and MS-SMB2 2.2.14.2.12 */
> >> +/* Flags */
> >> +#define SMB2_DHANDLE_FLAG_PERSISTENT   0x00000002
> > I prefer moving it when the durable handle structures are moved to
> > /common later.
> > Thanks.
>
> --
> Thanks,
> ChenXiaoSong.
>
>