[XFS] move v_trace from bhv_vnode to xfs_inode

struct bhv_vnode is on it's way out, so move the trace buffer to the XFS
inode. Note that this makes the tracing macros rather misnamed, but this
kind of fallout will be fixed up incrementally later on.

SGI-PV: 969608
SGI-Modid: xfs-linux-melb:xfs-kern:29498a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

1 files changed, 27 insertions, 19 deletions

diff --git a/fs/xfs/linux-2.6/xfs_vnode.c b/fs/xfs/linux-2.6/xfs_vnode.c
index bde8d2e7f559..9d9464cf8de4 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.c
+++ b/fs/xfs/linux-2.6/xfs_vnode.c
@@ -103,11 +103,6 @@ vn_initialize(
 
 	ASSERT(VN_CACHED(vp) == 0);
 
-#ifdef	XFS_VNODE_TRACE
-	vp->v_trace = ktrace_alloc(VNODE_TRACE_SIZE, KM_SLEEP);
-#endif	/* XFS_VNODE_TRACE */
-
-	vn_trace_exit(vp, __FUNCTION__, (inst_t *)__return_address);
 	return vp;
 }
 
@@ -158,7 +153,7 @@ __vn_revalidate(
 {
 	int		error;
 
-	vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address);
+	vn_trace_entry(xfs_vtoi(vp), __FUNCTION__, (inst_t *)__return_address);
 	vattr->va_mask = XFS_AT_STAT | XFS_AT_XFLAGS;
 	error = xfs_getattr(xfs_vtoi(vp), vattr, 0);
 	if (likely(!error)) {
@@ -196,12 +191,25 @@ vn_hold(
 
 #ifdef	XFS_VNODE_TRACE
 
-#define KTRACE_ENTER(vp, vk, s, line, ra)			\
-	ktrace_enter(	(vp)->v_trace,				\
+/*
+ * Reference count of Linux inode if present, -1 if the xfs_inode
+ * has no associated Linux inode.
+ */
+static inline int xfs_icount(struct xfs_inode *ip)
+{
+	bhv_vnode_t *vp = XFS_ITOV_NULL(ip);
+
+	if (vp)
+		return vn_count(vp);
+	return -1;
+}
+
+#define KTRACE_ENTER(ip, vk, s, line, ra)			\
+	ktrace_enter(	(ip)->i_trace,				\
 /*  0 */		(void *)(__psint_t)(vk),		\
 /*  1 */		(void *)(s),				\
 /*  2 */		(void *)(__psint_t) line,		\
-/*  3 */		(void *)(__psint_t)(vn_count(vp)),	\
+/*  3 */		(void *)(__psint_t)xfs_icount(ip),	\
 /*  4 */		(void *)(ra),				\
 /*  5 */		NULL,					\
 /*  6 */		(void *)(__psint_t)current_cpu(),	\
@@ -213,32 +221,32 @@ vn_hold(
  * Vnode tracing code.
  */
 void
-vn_trace_entry(bhv_vnode_t *vp, const char *func, inst_t *ra)
+vn_trace_entry(xfs_inode_t *ip, const char *func, inst_t *ra)
 {
-	KTRACE_ENTER(vp, VNODE_KTRACE_ENTRY, func, 0, ra);
+	KTRACE_ENTER(ip, VNODE_KTRACE_ENTRY, func, 0, ra);
 }
 
 void
-vn_trace_exit(bhv_vnode_t *vp, const char *func, inst_t *ra)
+vn_trace_exit(xfs_inode_t *ip, const char *func, inst_t *ra)
 {
-	KTRACE_ENTER(vp, VNODE_KTRACE_EXIT, func, 0, ra);
+	KTRACE_ENTER(ip, VNODE_KTRACE_EXIT, func, 0, ra);
 }
 
 void
-vn_trace_hold(bhv_vnode_t *vp, char *file, int line, inst_t *ra)
+vn_trace_hold(xfs_inode_t *ip, char *file, int line, inst_t *ra)
 {
-	KTRACE_ENTER(vp, VNODE_KTRACE_HOLD, file, line, ra);
+	KTRACE_ENTER(ip, VNODE_KTRACE_HOLD, file, line, ra);
 }
 
 void
-vn_trace_ref(bhv_vnode_t *vp, char *file, int line, inst_t *ra)
+vn_trace_ref(xfs_inode_t *ip, char *file, int line, inst_t *ra)
 {
-	KTRACE_ENTER(vp, VNODE_KTRACE_REF, file, line, ra);
+	KTRACE_ENTER(ip, VNODE_KTRACE_REF, file, line, ra);
 }
 
 void
-vn_trace_rele(bhv_vnode_t *vp, char *file, int line, inst_t *ra)
+vn_trace_rele(xfs_inode_t *ip, char *file, int line, inst_t *ra)
 {
-	KTRACE_ENTER(vp, VNODE_KTRACE_RELE, file, line, ra);
+	KTRACE_ENTER(ip, VNODE_KTRACE_RELE, file, line, ra);
 }
 #endif	/* XFS_VNODE_TRACE */