[01/21] cifs: add pdu_size to the TCP_Server_Info structure

and get rid of some get_rfc1002_length() in smb2

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
---
 fs/cifs/cifsglob.h | 2 ++
 fs/cifs/cifssmb.c  | 2 +-
 fs/cifs/connect.c  | 3 ++-
 fs/cifs/smb2ops.c  | 8 ++++----
 4 files changed, 9 insertions(+), 6 deletions(-)

2018-04-09 1:06 GMT-07:00 Ronnie Sahlberg <lsahlber@redhat.com>:
> and get rid of some get_rfc1002_length() in smb2
>
> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
> ---
>  fs/cifs/cifsglob.h | 2 ++
>  fs/cifs/cifssmb.c  | 2 +-
>  fs/cifs/connect.c  | 3 ++-
>  fs/cifs/smb2ops.c  | 8 ++++----
>  4 files changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
> index 2282562e78a1..92ba96fae09e 100644
> --- a/fs/cifs/cifsglob.h
> +++ b/fs/cifs/cifsglob.h
> @@ -665,6 +665,8 @@ struct TCP_Server_Info {
>         struct delayed_work     echo; /* echo ping workqueue job */
>         char    *smallbuf;      /* pointer to current "small" buffer */
>         char    *bigbuf;        /* pointer to current "big" buffer */
> +       /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
> +       unsigned int pdu_size;
>         unsigned int total_read; /* total amount of data read in this pass */
>  #ifdef CONFIG_CIFS_FSCACHE
>         struct fscache_cookie   *fscache; /* client index cache cookie */
> diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
> index 59c09a596c0a..991e9d9ef90a 100644
> --- a/fs/cifs/cifssmb.c
> +++ b/fs/cifs/cifssmb.c
> @@ -1454,7 +1454,7 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
>         unsigned int data_offset, data_len;
>         struct cifs_readdata *rdata = mid->callback_data;
>         char *buf = server->smallbuf;
> -       unsigned int buflen = get_rfc1002_length(buf) +
> +       unsigned int buflen = server->pdu_size +
>                 server->vals->header_preamble_size;
>         bool use_rdma_mr = false;
>
> diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
> index 4e0808f40195..48012a0addf1 100644
> --- a/fs/cifs/connect.c
> +++ b/fs/cifs/connect.c
> @@ -772,7 +772,7 @@ standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
>  {
>         int length;
>         char *buf = server->smallbuf;
> -       unsigned int pdu_length = get_rfc1002_length(buf);
> +       unsigned int pdu_length = server->pdu_size;
>
>         /* make sure this will fit in a large buffer */
>         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) -
> @@ -881,6 +881,7 @@ cifs_demultiplex_thread(void *p)
>                  * so we can now interpret the length field.
>                  */
>                 pdu_length = get_rfc1002_length(buf);
> +               server->pdu_size = pdu_length;
>
>                 cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
>                 if (!is_smb_response(server, buf[0]))
> diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
> index 968b1d43a1ea..def84fed3571 100644
> --- a/fs/cifs/smb2ops.c
> +++ b/fs/cifs/smb2ops.c
> @@ -2550,7 +2550,7 @@ receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
>         unsigned int npages;
>         struct page **pages;
>         unsigned int len;
> -       unsigned int buflen = get_rfc1002_length(buf) + server->vals->header_preamble_size;
> +       unsigned int buflen = server->pdu_size + server->vals->header_preamble_size;
>         int rc;
>         int i = 0;
>
> @@ -2624,7 +2624,7 @@ receive_encrypted_standard(struct TCP_Server_Info *server,
>  {
>         int length;
>         char *buf = server->smallbuf;
> -       unsigned int pdu_length = get_rfc1002_length(buf);
> +       unsigned int pdu_length = server->pdu_size;
>         unsigned int buf_size;
>         struct mid_q_entry *mid_entry;
>
> @@ -2668,7 +2668,7 @@ static int
>  smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
>  {
>         char *buf = server->smallbuf;
> -       unsigned int pdu_length = get_rfc1002_length(buf);
> +       unsigned int pdu_length = server->pdu_size;
>         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
>         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
>
> @@ -2699,7 +2699,7 @@ smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
>  {
>         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
>
> -       return handle_read_data(server, mid, buf, get_rfc1002_length(buf) +
> +       return handle_read_data(server, mid, buf, server->pdu_size +
>                                 server->vals->header_preamble_size,
>                                 NULL, 0, 0);
>  }
> --
> 2.13.3
>
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Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>

--
Best regards,
Pavel Shilovsky
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