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Commit c74093b6 authored by Jeff Layton's avatar Jeff Layton Committed by Steve French
Browse files

cifs: set up recurring workqueue job to do SMB echo requests 



Reviewed-by: default avatarSuresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent 766fdbb5

fs/cifs/cifsglob.h

+1 −0
Original line number Diff line number Diff line
@@ -218,6 +218,7 @@ struct TCP_Server_Info { 
	bool	sec_kerberosu2u;	/* supports U2U Kerberos */

	bool	sec_ntlmssp;		/* supports NTLMSSP */

	bool session_estab; /* mark when very first sess is established */

	struct delayed_work	echo; /* echo ping workqueue job */

#ifdef CONFIG_CIFS_FSCACHE

	struct fscache_cookie   *fscache; /* client index cache cookie */

#endif

fs/cifs/connect.c

+29 −0
Original line number Diff line number Diff line
@@ -52,6 +52,9 @@ 
#define CIFS_PORT 445

#define RFC1001_PORT 139



/* SMB echo "timeout" -- FIXME: tunable? */

#define SMB_ECHO_INTERVAL (60 * HZ)



extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,

			 unsigned char *p24);
@@ -333,6 +336,26 @@ static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) 


}



static void

cifs_echo_request(struct work_struct *work)

{

	int rc;

	struct TCP_Server_Info *server = container_of(work,

					struct TCP_Server_Info, echo.work);



	/* no need to ping if we got a response recently */

	if (time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))

		goto requeue_echo;



	rc = CIFSSMBEcho(server);

	if (rc)

		cFYI(1, "Unable to send echo request to server: %s",

			server->hostname);



requeue_echo:

	queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL);

}



static int

cifs_demultiplex_thread(struct TCP_Server_Info *server)

{
@@ -1571,6 +1594,8 @@ cifs_put_tcp_session(struct TCP_Server_Info *server) 
	list_del_init(&server->tcp_ses_list);

	spin_unlock(&cifs_tcp_ses_lock);



	cancel_delayed_work_sync(&server->echo);



	spin_lock(&GlobalMid_Lock);

	server->tcpStatus = CifsExiting;

	spin_unlock(&GlobalMid_Lock);
@@ -1662,6 +1687,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info) 
	tcp_ses->sequence_number = 0;

	INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);

	INIT_LIST_HEAD(&tcp_ses->smb_ses_list);

	INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);



	/*

	 * at this point we are the only ones with the pointer
@@ -1710,6 +1736,9 @@ cifs_get_tcp_session(struct smb_vol *volume_info) 


	cifs_fscache_get_client_cookie(tcp_ses);



	/* queue echo request delayed work */

	queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);



	return tcp_ses;



out_err_crypto_release: