[v7,01/22] CIFS: SMBD: Add parameter rdata to smb2_new_read_req

From: Long Li <longli@microsoft.com>

This patch is for preparing upper layer for doing SMB read via RDMA write.

When we assemble the SMB read packet header, we need to know the I/O layout
if this request is to use a RDMA write. rdata has all the information we need
for memory registration. Add rdata to smb2_new_read_req.

Signed-off-by: Long Li <longli@microsoft.com>
---
 fs/cifs/smb2pdu.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

2017-11-07 0:54 GMT-08:00 Long Li <longli@exchange.microsoft.com>:
> From: Long Li <longli@microsoft.com>
>
> This patch is for preparing upper layer for doing SMB read via RDMA write.
>
> When we assemble the SMB read packet header, we need to know the I/O layout
> if this request is to use a RDMA write. rdata has all the information we need
> for memory registration. Add rdata to smb2_new_read_req.
>
> Signed-off-by: Long Li <longli@microsoft.com>
> ---
>  fs/cifs/smb2pdu.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
>
> diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
> index bab3da6..32ad590 100644
> --- a/fs/cifs/smb2pdu.c
> +++ b/fs/cifs/smb2pdu.c
> @@ -2350,18 +2350,21 @@ SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
>   */
>  static int
>  smb2_new_read_req(void **buf, unsigned int *total_len,
> -                 struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
> -                 int request_type)
> +       struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
> +       unsigned int remaining_bytes, int request_type)
>  {
>         int rc = -EACCES;
>         struct smb2_read_plain_req *req = NULL;
>         struct smb2_sync_hdr *shdr;
> +       struct TCP_Server_Info *server;
>
>         rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
>                                  total_len);
>         if (rc)
>                 return rc;
> -       if (io_parms->tcon->ses->server == NULL)
> +
> +       server = io_parms->tcon->ses->server;
> +       if (server == NULL)
>                 return -ECONNABORTED;
>
>         shdr = &req->sync_hdr;
> @@ -2489,7 +2492,8 @@ smb2_async_readv(struct cifs_readdata *rdata)
>
>         server = io_parms.tcon->ses->server;
>
> -       rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
> +       rc = smb2_new_read_req(
> +               (void **) &buf, &total_len, &io_parms, rdata, 0, 0);
>         if (rc) {
>                 if (rc == -EAGAIN && rdata->credits) {
>                         /* credits was reset by reconnect */
> @@ -2557,7 +2561,7 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
>         struct cifs_ses *ses = io_parms->tcon->ses;
>
>         *nbytes = 0;
> -       rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
> +       rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
>         if (rc)
>                 return rc;
>
> --
> 2.7.4
>
> --
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Looks good.

Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>

--
Best regards,
Pavel Shilovsky
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Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>

----- Original Message -----
From: "Long Li" <longli@exchange.microsoft.com>
To: "Steve French" <sfrench@samba.org>, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, "Christoph Hellwig" <hch@infradead.org>, "Tom Talpey" <ttalpey@microsoft.com>, "Matthew Wilcox" <mawilcox@microsoft.com>, "Stephen Hemminger" <sthemmin@microsoft.com>
Cc: "Long Li" <longli@microsoft.com>
Sent: Tuesday, 7 November, 2017 7:54:53 PM
Subject: [Patch v7 01/22] CIFS: SMBD: Add parameter rdata to smb2_new_read_req

From: Long Li <longli@microsoft.com>

This patch is for preparing upper layer for doing SMB read via RDMA write.

When we assemble the SMB read packet header, we need to know the I/O layout
if this request is to use a RDMA write. rdata has all the information we need
for memory registration. Add rdata to smb2_new_read_req.

Signed-off-by: Long Li <longli@microsoft.com>
---
 fs/cifs/smb2pdu.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index bab3da6..32ad590 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -2350,18 +2350,21 @@ SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
  */
 static int
 smb2_new_read_req(void **buf, unsigned int *total_len,
-		  struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
-		  int request_type)
+	struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
+	unsigned int remaining_bytes, int request_type)
 {
 	int rc = -EACCES;
 	struct smb2_read_plain_req *req = NULL;
 	struct smb2_sync_hdr *shdr;
+	struct TCP_Server_Info *server;
 
 	rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
 				 total_len);
 	if (rc)
 		return rc;
-	if (io_parms->tcon->ses->server == NULL)
+
+	server = io_parms->tcon->ses->server;
+	if (server == NULL)
 		return -ECONNABORTED;
 
 	shdr = &req->sync_hdr;
@@ -2489,7 +2492,8 @@ smb2_async_readv(struct cifs_readdata *rdata)
 
 	server = io_parms.tcon->ses->server;
 
-	rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
+	rc = smb2_new_read_req(
+		(void **) &buf, &total_len, &io_parms, rdata, 0, 0);
 	if (rc) {
 		if (rc == -EAGAIN && rdata->credits) {
 			/* credits was reset by reconnect */
@@ -2557,7 +2561,7 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
 	struct cifs_ses *ses = io_parms->tcon->ses;
 
 	*nbytes = 0;
-	rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
+	rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0);
 	if (rc)
 		return rc;