X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Fvs_context.h;h=ab0e56ee92bd4e071ccde6c185948358fa040243;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=541935bcb4b158e982f24a907db3f3b1d4676a25;hpb=9bf4aaab3e101692164d49b7ca357651eb691cb6;p=linux-2.6.git

diff --git a/include/linux/vs_context.h b/include/linux/vs_context.h
index 541935bcb..ab0e56ee9 100644
--- a/include/linux/vs_context.h
+++ b/include/linux/vs_context.h
@@ -3,16 +3,9 @@
 
 
 #include <linux/kernel.h>
-#include <linux/rcupdate.h>
-#include <linux/sched.h>
-
-#include "vserver/context.h"
 #include "vserver/debug.h"
 
 
-extern int proc_pid_vx_info(struct task_struct *, char *);
-
-
 #define get_vx_info(i)	__get_vx_info(i,__FILE__,__LINE__)
 
 static inline struct vx_info *__get_vx_info(struct vx_info *vxi,
@@ -20,16 +13,18 @@ static inline struct vx_info *__get_vx_info(struct vx_info *vxi,
 {
 	if (!vxi)
 		return NULL;
+
 	vxlprintk(VXD_CBIT(xid, 2), "get_vx_info(%p[#%d.%d])",
 		vxi, vxi?vxi->vx_id:0, vxi?atomic_read(&vxi->vx_usecnt):0,
 		_file, _line);
+	vxh_get_vx_info(vxi);
+
 	atomic_inc(&vxi->vx_usecnt);
 	return vxi;
 }
 
 
-#define	free_vx_info(i)	\
-	call_rcu(&i->vx_rcu, rcu_free_vx_info);
+extern void free_vx_info(struct vx_info *);
 
 #define put_vx_info(i)	__put_vx_info(i,__FILE__,__LINE__)
 
@@ -40,56 +35,122 @@ static inline void __put_vx_info(struct vx_info *vxi, const char *_file, int _li
 	vxlprintk(VXD_CBIT(xid, 2), "put_vx_info(%p[#%d.%d])",
 		vxi, vxi?vxi->vx_id:0, vxi?atomic_read(&vxi->vx_usecnt):0,
 		_file, _line);
+	vxh_put_vx_info(vxi);
+
 	if (atomic_dec_and_test(&vxi->vx_usecnt))
 		free_vx_info(vxi);
 }
 
+
+#define init_vx_info(p,i) __init_vx_info(p,i,__FILE__,__LINE__)
+
+static inline void __init_vx_info(struct vx_info **vxp, struct vx_info *vxi,
+		const char *_file, int _line)
+{
+	if (vxi) {
+		vxlprintk(VXD_CBIT(xid, 3),
+			"init_vx_info(%p[#%d.%d])",
+			vxi, vxi?vxi->vx_id:0,
+			vxi?atomic_read(&vxi->vx_usecnt):0,
+			_file, _line);
+		vxh_init_vx_info(vxi, vxp);
+
+		atomic_inc(&vxi->vx_usecnt);
+	}
+	*vxp = vxi;
+}
+
+
 #define set_vx_info(p,i) __set_vx_info(p,i,__FILE__,__LINE__)
 
 static inline void __set_vx_info(struct vx_info **vxp, struct vx_info *vxi,
 	const char *_file, int _line)
 {
-	BUG_ON(*vxp);
+	struct vx_info *vxo;
+
 	if (!vxi)
 		return;
-	vxlprintk(VXD_CBIT(xid, 3), "set_vx_info(%p[#%d.%d.%d])",
+
+	vxlprintk(VXD_CBIT(xid, 3), "set_vx_info(%p[#%d.%d])",
 		vxi, vxi?vxi->vx_id:0,
 		vxi?atomic_read(&vxi->vx_usecnt):0,
-		vxi?atomic_read(&vxi->vx_refcnt):0,
 		_file, _line);
-	atomic_inc(&vxi->vx_refcnt);
-	*vxp = __get_vx_info(vxi, _file, _line);
+	vxh_set_vx_info(vxi, vxp);
+
+	// vxo = xchg(vxp, __get_vx_info(vxi, _file, _line));
+	atomic_inc(&vxi->vx_usecnt);
+	vxo = xchg(vxp, vxi);
+	BUG_ON(vxo);
 }
 
-#define	clr_vx_info(p)	__clr_vx_info(p,__FILE__,__LINE__)
+
+#define clr_vx_info(p) __clr_vx_info(p,__FILE__,__LINE__)
 
 static inline void __clr_vx_info(struct vx_info **vxp,
 	const char *_file, int _line)
 {
-	struct vx_info *vxo = *vxp;
+	struct vx_info *vxo;
 
+	vxo = xchg(vxp, NULL);
 	if (!vxo)
 		return;
-	vxlprintk(VXD_CBIT(xid, 3), "clr_vx_info(%p[#%d.%d.%d])",
+
+	vxlprintk(VXD_CBIT(xid, 3), "clr_vx_info(%p[#%d.%d])",
 		vxo, vxo?vxo->vx_id:0,
 		vxo?atomic_read(&vxo->vx_usecnt):0,
-		vxo?atomic_read(&vxo->vx_refcnt):0,
 		_file, _line);
-	*vxp = NULL;
-	wmb();
-	if (vxo && atomic_dec_and_test(&vxo->vx_refcnt))
-		unhash_vx_info(vxo);
-	__put_vx_info(vxo, _file, _line);
+	vxh_clr_vx_info(vxo, vxp);
+
+	// __put_vx_info(vxo, _file, _line);
+	if (atomic_dec_and_test(&vxo->vx_usecnt))
+		free_vx_info(vxo);
 }
 
 
-#define task_get_vx_info(i)	__task_get_vx_info(i,__FILE__,__LINE__)
+#define claim_vx_info(v,p) __claim_vx_info(v,p,__FILE__,__LINE__)
+
+static inline void __claim_vx_info(struct vx_info *vxi,
+	struct task_struct *task, const char *_file, int _line)
+{
+	vxlprintk(VXD_CBIT(xid, 3), "claim_vx_info(%p[#%d.%d.%d]) %p",
+		vxi, vxi?vxi->vx_id:0,
+		vxi?atomic_read(&vxi->vx_usecnt):0,
+		vxi?atomic_read(&vxi->vx_tasks):0,
+		task, _file, _line);
+	vxh_claim_vx_info(vxi, task);
+
+	atomic_inc(&vxi->vx_tasks);
+}
+
+
+extern void unhash_vx_info(struct vx_info *);
+
+#define release_vx_info(v,p) __release_vx_info(v,p,__FILE__,__LINE__)
+
+static inline void __release_vx_info(struct vx_info *vxi,
+	struct task_struct *task, const char *_file, int _line)
+{
+	vxlprintk(VXD_CBIT(xid, 3), "release_vx_info(%p[#%d.%d.%d]) %p",
+		vxi, vxi?vxi->vx_id:0,
+		vxi?atomic_read(&vxi->vx_usecnt):0,
+		vxi?atomic_read(&vxi->vx_tasks):0,
+		task, _file, _line);
+	vxh_release_vx_info(vxi, task);
+
+	might_sleep();
+
+	if (atomic_dec_and_test(&vxi->vx_tasks))
+		unhash_vx_info(vxi);
+}
+
+
+#define task_get_vx_info(p)	__task_get_vx_info(p,__FILE__,__LINE__)
 
 static __inline__ struct vx_info *__task_get_vx_info(struct task_struct *p,
 	const char *_file, int _line)
 {
 	struct vx_info *vxi;
-	
+
 	task_lock(p);
 	vxlprintk(VXD_CBIT(xid, 5), "task_get_vx_info(%p)",
 		p, _file, _line);
@@ -99,20 +160,6 @@ static __inline__ struct vx_info *__task_get_vx_info(struct task_struct *p,
 }
 
 
-#define vx_verify_info(p,i)	\
-	__vx_verify_info((p)->vx_info,i,__FILE__,__LINE__)
-
-static __inline__ void __vx_verify_info(
-	struct vx_info *vxa, struct vx_info *vxb,
-	const char *_file, int _line)
-{
-	if (vxa == vxb)
-		return;
-	printk(KERN_ERR "vx bad assumption (%p==%p) at %s:%d\n",
-		vxa, vxb, _file, _line);
-}
-
-
 #else
 #warning duplicate inclusion
 #endif