Hi Herbert,
Am Freitag, 30. März 2007 schrieb Herbert Poetzl:
>
> cya there then ...
>
after our conversion I got the quick cifs hack running (using a special
CLONE-flag for the cifs-thread).
The I got this patch, which changes the api to kthread_run. But, the problem
remains. I still got this error in dmesg:
vxW: xid=115 tried to spawn a kernel thread.
CIFS VFS: cifs_mount failed w/return code = -12
The patch works if I try to mount on the host.
Any suggestions?
-
Wilhelm
Index: connect.c
===================================================================
--- connect.c (.../2.6.19.1) (revision 20)
+++ connect.c (.../kthread_support) (revision 20)
@@ -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 <asm/uaccess.h>
#include <asm/processor.h>
@@ -119,7 +120,7 @@
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);
@@ -181,7 +182,7 @@
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) {
@@ -198,7 +199,7 @@
} 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);
@@ -344,7 +345,6 @@
int isMultiRsp;
int reconnect;
- daemonize("cifsd");
allow_signal(SIGKILL);
current->flags |= PF_MEMALLOC;
server->tsk = current; /* save process info to wake at shutdown */
@@ -360,7 +360,7 @@
GFP_KERNEL);
}
- while (server->tcpStatus != CifsExiting) {
+ while (!kthread_should_stop()) {
if (try_to_freeze())
continue;
if (bigbuf == NULL) {
@@ -399,7 +399,7 @@
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"));
@@ -523,7 +523,7 @@
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;
@@ -756,7 +756,6 @@
GFP_KERNEL);
}
- complete_and_exit(&cifsd_complete, 0);
return 0;
}
@@ -1779,10 +1778,11 @@
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);
@@ -1973,7 +1973,7 @@
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 */
@@ -1987,9 +1987,9 @@
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"));
@@ -3273,7 +3273,7 @@
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
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