[4/5] cifs: add SMB2_query_info_[init|free]()

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
---
 fs/cifs/smb2pdu.c   | 68 ++++++++++++++++++++++++++++++++++++-----------------
 fs/cifs/smb2proto.h |  5 ++++
 2 files changed, 51 insertions(+), 22 deletions(-)

2018-08-07 22:07 GMT-07:00 Ronnie Sahlberg <lsahlber@redhat.com>:
> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
> ---
>  fs/cifs/smb2pdu.c   | 68 ++++++++++++++++++++++++++++++++++++-----------------
>  fs/cifs/smb2proto.h |  5 ++++
>  2 files changed, 51 insertions(+), 22 deletions(-)
>
> diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
> index 575293fe4b28..0b0c22fafb03 100644
> --- a/fs/cifs/smb2pdu.c
> +++ b/fs/cifs/smb2pdu.c
> @@ -2583,36 +2583,22 @@ validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
>         return 0;
>  }
>
> -static int
> -query_info(const unsigned int xid, struct cifs_tcon *tcon,
> -          u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
> -          u32 additional_info, size_t output_len, size_t min_len, void **data,
> -               u32 *dlen)
> +int
> +SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
> +                    u64 persistent_fid, u64 volatile_fid,
> +                    u8 info_class, u8 info_type, u32 additional_info,
> +                    size_t output_len)
>  {
> -       struct smb_rqst rqst;
>         struct smb2_query_info_req *req;
> -       struct smb2_query_info_rsp *rsp = NULL;
> -       struct kvec iov[2];
> -       struct kvec rsp_iov;
> -       int rc = 0;
> -       int resp_buftype;
> -       struct cifs_ses *ses = tcon->ses;
> -       int flags = 0;
> +       struct kvec *iov = rqst->rq_iov;
>         unsigned int total_len;
> -
> -       cifs_dbg(FYI, "Query Info\n");
> -
> -       if (!ses || !(ses->server))
> -               return -EIO;
> +       int rc;
>
>         rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req,
>                              &total_len);
>         if (rc)
>                 return rc;
>
> -       if (smb3_encryption_required(tcon))
> -               flags |= CIFS_TRANSFORM_REQ;
> -
>         req->InfoType = info_type;
>         req->FileInfoClass = info_class;
>         req->PersistentFileId = persistent_fid;
> @@ -2629,13 +2615,50 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon,
>         iov[0].iov_base = (char *)req;
>         /* 1 for Buffer */
>         iov[0].iov_len = total_len - 1;
> +       return 0;
> +}
> +
> +void
> +SMB2_query_info_free(struct smb_rqst *rqst) {
> +       cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
> +}
> +
> +
> +static int
> +query_info(const unsigned int xid, struct cifs_tcon *tcon,
> +          u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type,
> +          u32 additional_info, size_t output_len, size_t min_len, void **data,
> +               u32 *dlen)
> +{
> +       struct smb_rqst rqst;
> +       struct smb2_query_info_rsp *rsp = NULL;
> +       struct kvec iov[1];
> +       struct kvec rsp_iov;
> +       int rc = 0;
> +       int resp_buftype;
> +       struct cifs_ses *ses = tcon->ses;
> +       int flags = 0;
> +
> +       cifs_dbg(FYI, "Query Info\n");
> +
> +       if (!ses || !(ses->server))
> +               return -EIO;
> +
> +       if (smb3_encryption_required(tcon))
> +               flags |= CIFS_TRANSFORM_REQ;
>
>         memset(&rqst, 0, sizeof(struct smb_rqst));
> +       memset(&iov, 0, sizeof(iov));
>         rqst.rq_iov = iov;
>         rqst.rq_nvec = 1;
>
> +       rc = SMB2_query_info_init(tcon, &rqst, persistent_fid, volatile_fid,
> +                                 info_class, info_type, additional_info,
> +                                 output_len);
> +       if (rc)
> +               goto qinf_exit;
> +
>         rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
> -       cifs_small_buf_release(req);
>         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
>
>         if (rc) {
> @@ -2664,6 +2687,7 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon,
>                                    &rsp_iov, min_len, *data);
>
>  qinf_exit:
> +       SMB2_query_info_free(&rqst);
>         free_rsp_buf(resp_buftype, rsp);
>         return rc;
>  }
> diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
> index b81220fd9bf5..57bdd2711974 100644
> --- a/fs/cifs/smb2proto.h
> +++ b/fs/cifs/smb2proto.h
> @@ -157,6 +157,11 @@ extern int SMB2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
>  extern int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
>                            u64 persistent_file_id, u64 volatile_file_id,
>                            struct smb2_file_all_info *data);
> +extern int SMB2_query_info_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
> +                               u64 persistent_fid, u64 volatile_fid,
> +                               u8 info_class, u8 info_type,
> +                               u32 additional_info, size_t output_len);
> +extern void SMB2_query_info_free(struct smb_rqst *rqst);
>  extern int SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
>                            u64 persistent_file_id, u64 volatile_file_id,
>                            void **data, unsigned int *plen);
> --
> 2.13.3
>
> --
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Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>

--
Best regards,
Pavel Shilovsky
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