smb: client: Remove an unused function and variable

From: "Dr. David Alan Gilbert" <linux@treblig.org>

SMB2_QFS_info() has been unused since 2018's
commit 730928c8f4be ("cifs: update smb2_queryfs() to use compounding")

sign_CIFS_PDUs has been unused since 2009's
commit 2edd6c5b0517 ("[CIFS] NTLMSSP support moving into new file, old dead
code removed")

Remove them.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
---
 fs/smb/client/cifsfs.c    |  1 -
 fs/smb/client/smb2pdu.c   | 65 ---------------------------------------
 fs/smb/client/smb2proto.h |  3 --
 3 files changed, 69 deletions(-)

This looks fine as something for 6.16-rc next month.

On Sat, May 3, 2025 at 6:40 PM <linux@treblig.org> wrote:
>
> From: "Dr. David Alan Gilbert" <linux@treblig.org>
>
> SMB2_QFS_info() has been unused since 2018's
> commit 730928c8f4be ("cifs: update smb2_queryfs() to use compounding")
>
> sign_CIFS_PDUs has been unused since 2009's
> commit 2edd6c5b0517 ("[CIFS] NTLMSSP support moving into new file, old dead
> code removed")
>
> Remove them.
>
> Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
> ---
>  fs/smb/client/cifsfs.c    |  1 -
>  fs/smb/client/smb2pdu.c   | 65 ---------------------------------------
>  fs/smb/client/smb2proto.h |  3 --
>  3 files changed, 69 deletions(-)
>
> diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c
> index a08c42363ffc..d192a19bd761 100644
> --- a/fs/smb/client/cifsfs.c
> +++ b/fs/smb/client/cifsfs.c
> @@ -70,7 +70,6 @@ bool require_gcm_256; /* false by default */
>  bool enable_negotiate_signing; /* false by default */
>  unsigned int global_secflags = CIFSSEC_DEF;
>  /* unsigned int ntlmv2_support = 0; */
> -unsigned int sign_CIFS_PDUs = 1;
>
>  /*
>   * Global transaction id (XID) information
> diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
> index c4d52bebd37d..eef971509589 100644
> --- a/fs/smb/client/smb2pdu.c
> +++ b/fs/smb/client/smb2pdu.c
> @@ -5919,71 +5919,6 @@ SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
>         return rc;
>  }
>
> -int
> -SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
> -             u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
> -{
> -       struct smb_rqst rqst;
> -       struct smb2_query_info_rsp *rsp = NULL;
> -       struct kvec iov;
> -       struct kvec rsp_iov;
> -       int rc = 0;
> -       int resp_buftype;
> -       struct cifs_ses *ses = tcon->ses;
> -       struct TCP_Server_Info *server;
> -       struct smb2_fs_full_size_info *info = NULL;
> -       int flags = 0;
> -       int retries = 0, cur_sleep = 1;
> -
> -replay_again:
> -       /* reinitialize for possible replay */
> -       flags = 0;
> -       server = cifs_pick_channel(ses);
> -
> -       rc = build_qfs_info_req(&iov, tcon, server,
> -                               FS_FULL_SIZE_INFORMATION,
> -                               sizeof(struct smb2_fs_full_size_info),
> -                               persistent_fid, volatile_fid);
> -       if (rc)
> -               return rc;
> -
> -       if (smb3_encryption_required(tcon))
> -               flags |= CIFS_TRANSFORM_REQ;
> -
> -       memset(&rqst, 0, sizeof(struct smb_rqst));
> -       rqst.rq_iov = &iov;
> -       rqst.rq_nvec = 1;
> -
> -       if (retries)
> -               smb2_set_replay(server, &rqst);
> -
> -       rc = cifs_send_recv(xid, ses, server,
> -                           &rqst, &resp_buftype, flags, &rsp_iov);
> -       free_qfs_info_req(&iov);
> -       if (rc) {
> -               cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
> -               goto qfsinf_exit;
> -       }
> -       rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
> -
> -       info = (struct smb2_fs_full_size_info *)(
> -               le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
> -       rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
> -                              le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
> -                              sizeof(struct smb2_fs_full_size_info));
> -       if (!rc)
> -               smb2_copy_fs_info_to_kstatfs(info, fsdata);
> -
> -qfsinf_exit:
> -       free_rsp_buf(resp_buftype, rsp_iov.iov_base);
> -
> -       if (is_replayable_error(rc) &&
> -           smb2_should_replay(tcon, &retries, &cur_sleep))
> -               goto replay_again;
> -
> -       return rc;
> -}
> -
>  int
>  SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
>               u64 persistent_fid, u64 volatile_fid, int level)
> diff --git a/fs/smb/client/smb2proto.h b/fs/smb/client/smb2proto.h
> index 4662c7e2d259..035aa1624053 100644
> --- a/fs/smb/client/smb2proto.h
> +++ b/fs/smb/client/smb2proto.h
> @@ -259,9 +259,6 @@ extern int smb2_handle_cancelled_close(struct cifs_tcon *tcon,
>                                        __u64 volatile_fid);
>  extern int smb2_handle_cancelled_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server);
>  void smb2_cancelled_close_fid(struct work_struct *work);
> -extern int SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
> -                        u64 persistent_file_id, u64 volatile_file_id,
> -                        struct kstatfs *FSData);
>  extern int SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
>                          u64 persistent_file_id, u64 volatile_file_id,
>                          struct kstatfs *FSData);
> --
> 2.49.0
>
>