[CIFS] Switch cifsd to kthread_run from kernel_thread

cifsd was the only cifs thread that had not been switched to the newer
kthread interface

Signed-off-by: Igor Mammedov <niallain at gmail.com>
Signed-off-by: Wilhelm Meier <wilhelm.meier@fh-kl.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 20ba7dc..9e41f8e 100644 (file)
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -30,6 +30,7 @@
 #include <linux/mempool.h>
 #include <linux/delay.h>
 #include <linux/completion.h>
+#include <linux/kthread.h>
 #include <linux/pagevec.h>
 #include <linux/freezer.h>
 #include <asm/uaccess.h>
@@ -120,7 +121,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
        struct mid_q_entry * mid_entry;
        
        spin_lock(&GlobalMid_Lock);
-       if(server->tcpStatus == CifsExiting) {
+       if( kthread_should_stop() ) {
                /* the demux thread will exit normally 
                next time through the loop */
                spin_unlock(&GlobalMid_Lock);
@@ -182,7 +183,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
        spin_unlock(&GlobalMid_Lock);
        up(&server->tcpSem); 
 
-       while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
+       while ( (!kthread_should_stop()) && (server->tcpStatus != CifsGood))
        {
                try_to_freeze();
                if(server->protocolType == IPV6) {
@@ -199,7 +200,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
                } else {
                        atomic_inc(&tcpSesReconnectCount);
                        spin_lock(&GlobalMid_Lock);
-                       if(server->tcpStatus != CifsExiting)
+                       if( !kthread_should_stop() )
                                server->tcpStatus = CifsGood;
                        server->sequence_number = 0;
                        spin_unlock(&GlobalMid_Lock);                   
@@ -345,7 +346,6 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
        int isMultiRsp;
        int reconnect;
 
-       daemonize("cifsd");
        allow_signal(SIGKILL);
        current->flags |= PF_MEMALLOC;
        server->tsk = current;  /* save process info to wake at shutdown */
@@ -361,7 +361,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
                        GFP_KERNEL);
        }
 
-       while (server->tcpStatus != CifsExiting) {
+       while (!kthread_should_stop()) {
                if (try_to_freeze())
                        continue;
                if (bigbuf == NULL) {
@@ -400,7 +400,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
                    kernel_recvmsg(csocket, &smb_msg,
                                 &iov, 1, 4, 0 /* BB see socket.h flags */);
 
-               if (server->tcpStatus == CifsExiting) {
+               if ( kthread_should_stop() ) {
                        break;
                } else if (server->tcpStatus == CifsNeedReconnect) {
                        cFYI(1, ("Reconnect after server stopped responding"));
@@ -524,7 +524,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
                     total_read += length) {
                        length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
                                                pdu_length - total_read, 0);
-                       if((server->tcpStatus == CifsExiting) ||
+                       if( kthread_should_stop() ||
                            (length == -EINTR)) {
                                /* then will exit */
                                reconnect = 2;
@@ -757,7 +757,6 @@ multi_t2_fnd:
                        GFP_KERNEL);
        }
        
-       complete_and_exit(&cifsd_complete, 0);
        return 0;
 }
 
@@ -1850,10 +1849,11 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
                        so no need to spinlock this init of tcpStatus */
                        srvTcp->tcpStatus = CifsNew;
                        init_MUTEX(&srvTcp->tcpSem);
-                       rc = (int)kernel_thread((void *)(void *)cifs_demultiplex_thread, srvTcp,
-                                     CLONE_FS | CLONE_FILES | CLONE_VM);
-                       if(rc < 0) {
-                               rc = -ENOMEM;
+                       srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
+                       if( IS_ERR(srvTcp->tsk) ) {
+                               rc = PTR_ERR(srvTcp->tsk);
+                               cERROR(1,("error %d create cifsd thread", rc));
+                               srvTcp->tsk = NULL;
                                sock_release(csocket);
                                kfree(volume_info.UNC);
                                kfree(volume_info.password);
@@ -2050,7 +2050,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
                        spin_unlock(&GlobalMid_Lock);
                        if(srvTcp->tsk) {
                                send_sig(SIGKILL,srvTcp->tsk,1);
-                               wait_for_completion(&cifsd_complete);
+                               kthread_stop(srvTcp->tsk);
                        }
                }
                 /* If find_unc succeeded then rc == 0 so we can not end */
@@ -2064,9 +2064,9 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
                                        temp_rc = CIFSSMBLogoff(xid, pSesInfo);
                                        /* if the socketUseCount is now zero */
                                        if((temp_rc == -ESHUTDOWN) &&
-                                          (pSesInfo->server->tsk)) {
+                                          (pSesInfo->server) && (pSesInfo->server->tsk)) {
                                                send_sig(SIGKILL,pSesInfo->server->tsk,1);
-                                               wait_for_completion(&cifsd_complete);
+                                               kthread_stop(pSesInfo->server->tsk);
                                        }
                                } else
                                        cFYI(1, ("No session or bad tcon"));
@@ -3316,7 +3316,7 @@ cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
                                cFYI(1,("Waking up socket by sending it signal"));
                                if(cifsd_task) {
                                        send_sig(SIGKILL,cifsd_task,1);
-                                       wait_for_completion(&cifsd_complete);
+                                       kthread_stop(cifsd_task);
                                }
                                rc = 0;
                        } /* else - we have an smb session