linux-kernel - Re: [PATCH v3 15/22] smb: move FILE_SYSTEM_ATTRIBUTE

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Message-ID: <1270d868-f67d-44f5-bbd4-0e506b646bdf@linux.dev>
Date: Tue, 21 Oct 2025 14:35:01 +0800
From: ChenXiaoSong <chenxiaosong.chenxiaosong@...ux.dev>
To: Namjae Jeon <linkinjeon@...nel.org>
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, linux-cifs@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 15/22] smb: move FILE_SYSTEM_ATTRIBUTE_INFO to
 common/cifspdu.h

Thanks for your suggestions. I’ll send v3 soon.

-- 
Thanks,
ChenXiaoSong.

On 10/20/25 1:35 PM, Namjae Jeon wrote:
> On Tue, Oct 14, 2025 at 4:30 PM <chenxiaosong.chenxiaosong@...ux.dev> wrote:
>>
>> From: ChenXiaoSong <chenxiaosong@...inos.cn>
>>
>> Rename "struct filesystem_attribute_info" to "FILE_SYSTEM_ATTRIBUTE_INFO",
>> then move duplicate definitions to common header file.
>>
>> Signed-off-by: ChenXiaoSong <chenxiaosong@...inos.cn>
> Please check the warnings from checkpatch.pl.
> 
> WARNING: do not add new typedefs
> #109: FILE: fs/smb/common/cifspdu.h:352:
> +typedef struct {
> 
> WARNING: Prefer __packed over __attribute__((packed))
> #114: FILE: fs/smb/common/cifspdu.h:357:
> +} __attribute__((packed)) FILE_SYSTEM_ATTRIBUTE_INFO;
> 
>> ---
>>   fs/smb/client/cifspdu.h    | 7 -------
>>   fs/smb/common/cifspdu.h    | 8 ++++++++
>>   fs/smb/server/smb2pdu.c    | 6 +++---
>>   fs/smb/server/smb_common.h | 7 -------
>>   4 files changed, 11 insertions(+), 17 deletions(-)
>>
>> diff --git a/fs/smb/client/cifspdu.h b/fs/smb/client/cifspdu.h
>> index 07eb821654e1..a6f7e168961e 100644
>> --- a/fs/smb/client/cifspdu.h
>> +++ b/fs/smb/client/cifspdu.h
>> @@ -1937,13 +1937,6 @@ typedef struct {
>>   /* minimum includes first three fields, and empty FS Name */
>>   #define MIN_FS_ATTR_INFO_SIZE 12
>>
>> -typedef struct {
>> -       __le32 Attributes;
>> -       __le32 MaxPathNameComponentLength;
>> -       __le32 FileSystemNameLen;
>> -       char FileSystemName[52]; /* do not have to save this - get subset? */
>> -} __attribute__((packed)) FILE_SYSTEM_ATTRIBUTE_INFO;
>> -
>>   /******************************************************************************/
>>   /* QueryFileInfo/QueryPathinfo (also for SetPath/SetFile) data buffer formats */
>>   /******************************************************************************/
>> diff --git a/fs/smb/common/cifspdu.h b/fs/smb/common/cifspdu.h
>> index 1109c20f7bf8..560900617be7 100644
>> --- a/fs/smb/common/cifspdu.h
>> +++ b/fs/smb/common/cifspdu.h
>> @@ -348,4 +348,12 @@ typedef struct server_negotiate_rsp {
>>   #define FILE_CASE_PRESERVED_NAMES      0x00000002
>>   #define FILE_CASE_SENSITIVE_SEARCH     0x00000001
>>
>> +/* See FS-FSCC 2.5.1 */
>> +typedef struct {
>> +       __le32 Attributes;
>> +       __le32 MaxPathNameComponentLength;
>> +       __le32 FileSystemNameLen;
>> +       __le16 FileSystemName[]; /* do not have to save this - get subset? */
>> +} __attribute__((packed)) FILE_SYSTEM_ATTRIBUTE_INFO;
>> +
>>   #endif /* _COMMON_CIFSPDU_H */
>> diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
>> index a46d4ddade9e..a05b04799c0d 100644
>> --- a/fs/smb/server/smb2pdu.c
>> +++ b/fs/smb/server/smb2pdu.c
>> @@ -5485,10 +5485,10 @@ static int smb2_get_info_filesystem(struct ksmbd_work *work,
>>          }
>>          case FS_ATTRIBUTE_INFORMATION:
>>          {
>> -               struct filesystem_attribute_info *info;
>> +               FILE_SYSTEM_ATTRIBUTE_INFO *info;
>>                  size_t sz;
>>
>> -               info = (struct filesystem_attribute_info *)rsp->Buffer;
>> +               info = (FILE_SYSTEM_ATTRIBUTE_INFO *)rsp->Buffer;
>>                  info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
>>                                                 FILE_PERSISTENT_ACLS |
>>                                                 FILE_UNICODE_ON_DISK |
>> @@ -5507,7 +5507,7 @@ static int smb2_get_info_filesystem(struct ksmbd_work *work,
>>                                          "NTFS", PATH_MAX, conn->local_nls, 0);
>>                  len = len * 2;
>>                  info->FileSystemNameLen = cpu_to_le32(len);
>> -               sz = sizeof(struct filesystem_attribute_info) + len;
>> +               sz = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO) + len;
>>                  rsp->OutputBufferLength = cpu_to_le32(sz);
>>                  break;
>>          }
>> diff --git a/fs/smb/server/smb_common.h b/fs/smb/server/smb_common.h
>> index a5dd656c36f1..016ec93e6df4 100644
>> --- a/fs/smb/server/smb_common.h
>> +++ b/fs/smb/server/smb_common.h
>> @@ -56,13 +56,6 @@
>>                  FILE_EXECUTE | FILE_DELETE_CHILD | \
>>                  FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES)
>>
>> -struct filesystem_attribute_info {
>> -       __le32 Attributes;
>> -       __le32 MaxPathNameComponentLength;
>> -       __le32 FileSystemNameLen;
>> -       __le16 FileSystemName[]; /* do not have to save this - get subset? */
>> -} __packed;
>> -
>>   struct filesystem_device_info {
>>          __le32 DeviceType;
>>          __le32 DeviceCharacteristics;
>> --
>> 2.43.0
>>