VFS - Revision history

Lundman at 07:14, 2 May 2014

2014-05-02T07:14:14Z

2014-05-02T06:09:21Z

2014-05-02T05:59:00Z

2014-05-02T05:41:35Z

2014-05-02T05:40:30Z

2014-05-02T05:35:39Z

2014-05-02T05:35:13Z

2014-05-02T05:34:56Z

2014-05-02T05:34:41Z

2014-05-02T05:33:48Z

@@ Line 21: / Line 21: @@
 |-
 !align="right" |IllumOS:
-|?
+|v_count
-|?
+|VN_HOLD
-|?
+|VN_RELE
 |'''IllumOS:'''
 |?

← Older revision		Revision as of 06:09, 2 May 2014
Line 58:		Line 58:

	If your code calls vnop_lookup, or vfs_root, they return a vnode with iocount+1, so you should call vnode_put() when you are done with the vnode.		If your code calls vnop_lookup, or vfs_root, they return a vnode with iocount+1, so you should call vnode_put() when you are done with the vnode.
		+
		+
		+	=== Differences ===
		+
		+	'''VNOP_ROOT''' on OSX will hold iocount. On FreeBSD will hold usecount as well as vn_lock (holdcount)

@@ Line 36: / Line 36: @@
 |holdcount
 |vn_lock
-|vn_unlock
+|VOP_UNLOCK
 |}

@@ Line 38: / Line 38: @@
 |vn_unlock
 |}
 OSX:

← Older revision		Revision as of 05:40, 2 May 2014
Line 38:		Line 38:
	\|vn_unlock		\|vn_unlock
	\|}		\|}
		+
		+	OSX:
		+
		+	When calling vnode_create(), the created vnode will have a iocount++ set. When you are finished with it, someone will call vnode_put()
		+
		+
		+	vnop_lookup is given a name, and if found, should call vnode_create, and return a vnode with iocount+1.
		+	vfs_root will return the rootvp, with iocount+1
		+
		+	All other vnops that take a vnode as input, will generally do
		+
		+	vnode_get(vp)
		+	VNOP_GETATTR(vp)
		+	node_put(vp)
		+
		+	So in most of your vnops, you do not call vnode_put, as that is handled by the caller (VFS). (list all vnops where this is true here)
		+
		+	If your code calls vnop_lookup, or vfs_root, they return a vnode with iocount+1, so you should call vnode_put() when you are done with the vnode.

@@ Line 15: / Line 15: @@
 |vnode_get*
 |vnode_put
-|OSX:
+|'''OSX:'''
 |usecount
 |vnode_ref
@@ Line 24: / Line 24: @@
 |?
 |?
-|IllumOS:
+|'''IllumOS:'''
 |?
 |?
@@ Line 33: / Line 33: @@
 |vget
 |vrele/vput
-|FreeBSD:
+|'''FreeBSD:'''
 |holdcount
 |vn_lock
 |vn_unlock
 |}

@@ Line 6: / Line 6: @@
 |incr
 |decr
-style="color:green;background-color:#ffffcc;" border="1" cellpadding="20" cellspacing="0"
+|'''Long-term holds'''
-!align="right" |Long-term holds
 |vnode->name
 |incr