[SSI] openssi/kernel/include/cluster/ssi/ipc unixnm.h,1.15,1.16

Update of /cvsroot/ssic-linux/openssi/kernel/include/cluster/ssi/ipc
In directory fdv4jf1.ch3.sourceforge.com:/tmp/cvs-serv23689/include/cluster/ssi/ipc

Modified Files:
      Tag: OPENSSI-FC
	unixnm.h 
Log Message:
CFS:
- Fix possible server token table hash key race with PFS file handle data.
- Further avoid ssi_get_super() to reduce contention. We don't cross mount points.
- Switch to Linux get_empty_filp() to get unused file structure for svrcfstok structure.
- Regression:
  - Possible inode leak when out of memory doing export ops get_dentry. (#ifdef CFS_EXPORT_OPS)
  - Possibly missed drop_super() while performing export ops get_dentry. (#ifdef CFS_FH_TO_DENTRY_ANON)

IPC:
- Fix uninitialized spin lock in kern_ipc_perm structure (in SSI context).
- Fix uninitialized linked list pointers in unixnm_svr_entry and unixnm_cache_entry structures.
- SHM dentry lookup bug fixes:
  - Error -ENOENT in CFS (negative dentry) due to not validating against PFS.
  - Fix SHM negative dentry lookup could cause future memory corruption.
    - Did not increment inode count when instantiating dentry.
    - Bad dentry reference count side-effect due to incorrect return value for Linux namespace architecture.

IPVS:
- Fix uninitialized linked list pointers in ipvs_dirinfo and portweight_list structures.

SSI:
- Fix dentry race calling __d_path() outside dcache lock. (#ifdef SSI_DCACHE_RACE_FIX)
- Fix uninitialized linked list pointers in structures rmtfb_cmn, ssidev_hash, fifonm_svr_entry, fifonm_cache_entry, and ssipty_svr_
entry.

VPROC:
- Fix possibly missed drop_super() during process migration exporting of file descriptors.
- Fix partially initialized proc_root_readdir_cookie structure.
- semundo_load_msg() handle process sysvsem.undo_list->proc_list race take two. (#ifdef VPROC_UNLOAD_SETSCHED_SMP)
- Regression:
  - Process migration traversing rmtfb path while importing SHM fd's; caused by fb_svrnode macro. (#ifdef REOP_EXPORT_PATH_SVRNODE)


Index: unixnm.h
===================================================================
RCS file: /cvsroot/ssic-linux/openssi/kernel/include/cluster/ssi/ipc/unixnm.h,v
retrieving revision 1.15
retrieving revision 1.16
diff -u -d -r1.15 -r1.16
--- unixnm.h	9 Feb 2009 05:00:36 -0000	1.15
+++ unixnm.h	19 Feb 2009 08:01:02 -0000	1.16
@@ -67,7 +67,7 @@
 #endif
 extern spinlock_t rmtunix_cache_listlock;
 #ifdef RCU_RMTUNIX_CACHE
-extern void rmtunix_dealloc(struct rcu_head *);
+extern void rmtunix_dealloc(struct rmtunix_socket_info *);
 #endif
 
 #ifdef RMTUNIX_SOCK_INFO_CACHE
@@ -220,20 +220,24 @@
 		might_sleep();
 	if (!atomic_dec_and_lock(&info->rsk_refcnt, &rmtunix_cache_listlock))
 		return;
-	LOCK_SPIN_LOCK(&info->rsk_spinlock);
-	if (atomic_read(&info->rsk_refcnt)) {
+	if (info->sk) {
+		SSI_ASSERT(info->rsk_cached);
+		LOCK_SPIN_LOCK(&info->rsk_spinlock);
+		if (atomic_read(&info->rsk_refcnt)) {
+			UNLOCK_SPIN_LOCK(&info->rsk_spinlock);
+			spin_unlock(&rmtunix_cache_listlock);
+			return;
+		}
+		info->rsk_cached = 0;
 		UNLOCK_SPIN_LOCK(&info->rsk_spinlock);
-		spin_unlock(&rmtunix_cache_listlock);
-		return;
-	}
-	info->rsk_cached = 0;
-	UNLOCK_SPIN_LOCK(&info->rsk_spinlock);
-	list_del_rcu(&info->list);
+	} else
+		BUG_ON(info->rsk_cached);
 #ifdef DEBUG
 	--rmtunix_cache_size;
 #endif
+	list_del_rcu(&info->list);
 	spin_unlock(&rmtunix_cache_listlock);
-	call_rcu(&info->rhead, rmtunix_dealloc);
+	rmtunix_dealloc(info);
 #else /* !RCU_RMTUNIX_CACHE */
 #ifdef IPC_STALE_RMTUNIX_CACHE_FIX
 	if (!atomic_dec_and_test(&info->rsk_refcnt)) {


------------------------------------------------------------------------------
Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA
-OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise
-Strategies to boost innovation and cut costs with open source participation
-Receive a $600 discount off the registration fee with the source code: SFAD
http://p.sf.net/sfu/XcvMzF8H