Re: [PATCH 1/3] cifs: rename posix create rsp

[Steve French <smfrench@gmail.com>]

tentatively merged into cifs-2.6.git for-next pending more testing

On Sat, Feb 8, 2020 at 8:51 AM Aurelien Aptel <aaptel@suse.com> wrote:
>
> little progress on the posix create response.
>
> * rename struct to create_posix_rsp to match with the request
>   create_posix context
> * make struct packed
> * pass smb info struct for parse_posix_ctxt to fill
> * use smb info struct as param
> * update TODO
>
> What needs to be done:
>
> SMB2_open() has an optional smb info out argument that it will fill.
> Callers making use of this are:
>
> - smb3_query_mf_symlink (need to investigate)
> - smb2_open_file
>
> Callers of smb2_open_file (via server->ops->open) are passing an
> smbinfo struct but that struct cannot hold POSIX information. All the
> call stack needs to be changed for a different info type. Maybe pass
> SMB generic struct like cifs_fattr instead.
>
> Signed-off-by: Aurelien Aptel <aaptel@suse.com>
> ---
>  fs/cifs/smb2pdu.c | 13 +++++++++----
>  fs/cifs/smb2pdu.h |  9 ++++++---
>  2 files changed, 15 insertions(+), 7 deletions(-)
>
> diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
> index 1234f9ccab03..7d4d7cdb2eb4 100644
> --- a/fs/cifs/smb2pdu.c
> +++ b/fs/cifs/smb2pdu.c
> @@ -1940,13 +1940,18 @@ parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
>  }
>
>  static void
> -parse_posix_ctxt(struct create_context *cc, struct smb_posix_info *pposix_inf)
> +parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info)
>  {
> -       /* struct smb_posix_info *ppinf = (struct smb_posix_info *)cc; */
> +       /* struct create_posix_rsp *posix = (struct create_posix_rsp *)cc; */
>
> -       /* TODO: Need to add parsing for the context and return */
> +       /*
> +        * TODO: Need to add parsing for the context and return. Can
> +        * smb2_file_all_info hold POSIX data? Need to change the
> +        * passed type from SMB2_open.
> +        */
>         printk_once(KERN_WARNING
>                     "SMB3 3.11 POSIX response context not completed yet\n");
> +
>  }
>
>  void
> @@ -1984,7 +1989,7 @@ smb2_parse_contexts(struct TCP_Server_Info *server,
>                         parse_query_id_ctxt(cc, buf);
>                 else if ((le16_to_cpu(cc->NameLength) == 16)) {
>                         if (memcmp(name, smb3_create_tag_posix, 16) == 0)
> -                               parse_posix_ctxt(cc, NULL);
> +                               parse_posix_ctxt(cc, buf);
>                 }
>                 /* else {
>                         cifs_dbg(FYI, "Context not matched with len %d\n",
> diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
> index fa03df130f1a..c84405ed603c 100644
> --- a/fs/cifs/smb2pdu.h
> +++ b/fs/cifs/smb2pdu.h
> @@ -1604,11 +1604,14 @@ struct smb2_file_id_information {
>  extern char smb2_padding[7];
>
>  /* equivalent of the contents of SMB3.1.1 POSIX open context response */
> -struct smb_posix_info {
> +struct create_posix_rsp {
>         __le32 nlink;
>         __le32 reparse_tag;
>         __le32 mode;
> -       kuid_t  uid;
> -       kuid_t  gid;
> +       /*
> +         var sized owner SID
> +         var sized group SID
> +       */
> +} __packed;
>  };
>  #endif                         /* _SMB2PDU_H */
> --
> 2.16.4
>


-- 
Thanks,

Steve