CIFS: SMBD: Add parameter rdata to smb2_new_read_req

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>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Acked-by: Ronnie Sahlberg <lsahlber.redhat.com>

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 9f883f4..c0dc049 100644 (file)
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -2429,18 +2429,21 @@ 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;
@@ -2568,7 +2571,8 @@ 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 */
@@ -2633,7 +2637,7 @@ 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;