[Patch v2 05/19] CIFS: SMBD: Connect to SMBDirect session

Long Li
2017-08-20T19:04:29Z

From: Long Li <longli@microsoft.com>

When "rdma" is specified in the mount option, CIFS attempts to connect to SMBDirect instead of TCP socket.

Signed-off-by: Long Li <longli@microsoft.com>
---
fs/cifs/connect.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index d5d0ecd..309eba0 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -45,6 +45,7 @@
#include <linux/parser.h>
#include <linux/bvec.h>

+#include "smbdirect.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
@@ -2299,12 +2300,26 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
else
tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ;

+ if (tcp_ses->rdma) {
+ tcp_ses->smbd_conn = smbd_get_connection(
+ tcp_ses, (struct sockaddr *)&volume_info->dstaddr);
+ if (tcp_ses->smbd_conn) {
+ cifs_dbg(VFS, "RDMA transport established\n");
+ rc = 0;
+ goto connected;
+ } else {
+ rc = -ENOENT;
+ goto out_err_crypto_release;
+ }
+ }
+
rc = ip_connect(tcp_ses);
if (rc < 0) {
cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
goto out_err_crypto_release;
}

+connected:
/*
* since we're in a cifs function already, we know that
* this will succeed. No need for try_module_get().
--
2.7.4