From: Aurelien Aptel <aaptel@suse.com>
Date: Thu, 14 Jun 2018 15:43:18 +0200
Subject: [PATCH] CIFS: add iface info to struct cifs_ses
Git-commit: b6f0dd5d75f9689d57c7ea49e52c80cabb876cb4
Patch-mainline: v4.18-rc1
References: bsc#1144333

Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Aurelien Aptel <aaptel@suse.com>
---
 fs/cifs/cifsglob.h | 21 +++++++++++++++++++++
 fs/cifs/misc.c     |  2 ++
 2 files changed, 23 insertions(+)

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index ff280447dae5..9dd5f1a3d64b 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -841,6 +841,13 @@ static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 
 #endif
 
+struct cifs_server_iface {
+	size_t speed;
+	unsigned int rdma_capable : 1;
+	unsigned int rss_capable : 1;
+	struct sockaddr_storage sockaddr;
+};
+
 /*
  * Session structure.  One of these for each uid session with a particular host
  */
@@ -878,6 +885,20 @@ struct cifs_ses {
 #ifdef CONFIG_CIFS_SMB311
 	__u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
 #endif /* 3.1.1 */
+
+	/*
+	 * Network interfaces available on the server this session is
+	 * connected to.
+	 *
+	 * Other channels can be opened by connecting and binding this
+	 * session to interfaces from this list.
+	 *
+	 * iface_lock should be taken when accessing any of these fields
+	 */
+	spinlock_t iface_lock;
+	struct cifs_server_iface *iface_list;
+	size_t iface_count;
+	unsigned long iface_last_update; /* jiffies */
 };
 
 static inline bool
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index bb40f3c050f6..53e8362cbc4a 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -82,6 +82,7 @@ sesInfoAlloc(void)
 		INIT_LIST_HEAD(&ret_buf->smb_ses_list);
 		INIT_LIST_HEAD(&ret_buf->tcon_list);
 		mutex_init(&ret_buf->session_mutex);
+		spin_lock_init(&ret_buf->iface_lock);
 	}
 	return ret_buf;
 }
@@ -102,6 +103,7 @@ sesInfoFree(struct cifs_ses *buf_to_free)
 	kfree(buf_to_free->user_name);
 	kfree(buf_to_free->domainName);
 	kzfree(buf_to_free->auth_key.response);
+	kfree(buf_to_free->iface_list);
 	kzfree(buf_to_free);
 }
 
-- 
2.16.4