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Subject[[PATCH v1] 33/37] [CIFS] Connect to SMBD transport when specified in mount option
Date
From: Long Li <longli@microsoft.com>

When "-o rdma" is specified, attempt to connect to SMB server via SMBD.

Signed-off-by: Long Li <longli@microsoft.com>
---
fs/cifs/connect.c | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 0dc942c..1ba5b92 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -45,6 +45,7 @@
#include <linux/parser.h>
#include <linux/bvec.h>

+#include "cifsrdma.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
@@ -2284,12 +2285,26 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
else
tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ;

- rc = ip_connect(tcp_ses);
- if (rc < 0) {
- cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
- goto out_err_crypto_release;
+ if (tcp_ses->rdma) {
+ tcp_ses->rdma_ses = cifs_create_rdma_session(tcp_ses, (struct sockaddr *)&volume_info->dstaddr);
+ if (tcp_ses->rdma_ses) {
+ cifs_dbg(VFS, "%s: RDMA transport established\n", __func__);
+ 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
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