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Subject[Patch v8 04/16] CIFS: SMBD: Implement function to destroy a SMB Direct connection
Date
From: Long Li <longli@microsoft.com>

Add function to tear down a SMB Direct connection. This is used by upper layer
to free all SMB Direct connection and transport resources.

Signed-off-by: Long Li <longli@microsoft.com>
---
fs/cifs/smbdirect.c | 16 ++++++++++++++++
fs/cifs/smbdirect.h | 3 +++
2 files changed, 19 insertions(+)

diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index a96058a..b462a2f 100644
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -1387,6 +1387,22 @@ static void idle_connection_timer(struct work_struct *work)
info->keep_alive_interval*HZ);
}

+/* Destroy this SMBD connection, called from upper layer */
+void smbd_destroy(struct smbd_connection *info)
+{
+ log_rdma_event(INFO, "destroying rdma session\n");
+
+ /* Kick off the disconnection process */
+ smbd_disconnect_rdma_connection(info);
+
+ log_rdma_event(INFO, "wait for transport being destroyed\n");
+ wait_event(info->wait_destroy,
+ info->transport_status == SMBD_DESTROYED);
+
+ destroy_workqueue(info->workqueue);
+ kfree(info);
+}
+
/*
* Reconnect this SMBD connection, called from upper layer
* return value: 0 on success, or actual error code
diff --git a/fs/cifs/smbdirect.h b/fs/cifs/smbdirect.h
index 8948f06..61bb649 100644
--- a/fs/cifs/smbdirect.h
+++ b/fs/cifs/smbdirect.h
@@ -249,6 +249,8 @@ struct smbd_connection *smbd_get_connection(

/* Reconnect SMBDirect session */
int smbd_reconnect(struct TCP_Server_Info *server);
+/* Destroy SMBDirect session */
+void smbd_destroy(struct smbd_connection *info);

#else
#define cifs_rdma_enabled(server) 0
@@ -256,6 +258,7 @@ struct smbd_connection {};
static inline void *smbd_get_connection(
struct TCP_Server_Info *server, struct sockaddr *dstaddr) {return NULL;}
static inline int smbd_reconnect(struct TCP_Server_Info *server) {return -1;}
+static inline void smbd_destroy(struct smbd_connection *info) {}
#endif

#endif
--
2.7.4
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