From 4295b530eeb68aaacbbeb5b2197ed14bf9295c2b Mon Sep 17 00:00:00 2001
From: Brian Behlendorf <behlendorf1@llnl.gov>
Date: Tue, 11 Jan 2011 11:53:05 -0800
Subject: [PATCH] Add vn_mode_to_vtype/vn_vtype to_mode helpers

Add simple helpers to convert a vnode->v_type to a inode->i_mode.
These should be used sparingly but they are handy to have.
---
 include/sys/mode.h     |  4 ++++
 include/sys/vnode.h    |  2 ++
 module/spl/spl-vnode.c | 41 +++++++++++++++++++++++++++++++++++------
 3 files changed, 41 insertions(+), 6 deletions(-)

diff --git a/include/sys/mode.h b/include/sys/mode.h
index f3d890944..ddd504f9f 100644
--- a/include/sys/mode.h
+++ b/include/sys/mode.h
@@ -25,4 +25,8 @@
 #ifndef _SPL_MODE_H
 #define _SPL_MODE_H
 
+#define IFTOVT(mode)	vn_mode_to_vtype(mode)
+#define VTTOIF(vtype)	vn_vtype_to_mode(vtype)
+#define MAKEIMODE(T, M) (VTTOIF(T) | ((M) & ~S_IFMT))
+
 #endif /* SPL_MODE_H */
diff --git a/include/sys/vnode.h b/include/sys/vnode.h
index 104e65d15..b5969b352 100644
--- a/include/sys/vnode.h
+++ b/include/sys/vnode.h
@@ -202,6 +202,8 @@ typedef struct caller_context {
 
 extern vnode_t *vn_alloc(int flag);
 void vn_free(vnode_t *vp);
+extern vtype_t vn_mode_to_vtype(mode_t);
+extern mode_t vn_vtype_to_mode(vtype_t);
 extern int vn_open(const char *path, uio_seg_t seg, int flags, int mode,
 		   vnode_t **vpp, int x1, void *x2);
 extern int vn_openat(const char *path, uio_seg_t seg, int flags, int mode,
diff --git a/module/spl/spl-vnode.c b/module/spl/spl-vnode.c
index 1847c7794..765dc4e2e 100644
--- a/module/spl/spl-vnode.c
+++ b/module/spl/spl-vnode.c
@@ -42,8 +42,8 @@ static spl_kmem_cache_t *vn_file_cache;
 static spinlock_t vn_file_lock = SPIN_LOCK_UNLOCKED;
 static LIST_HEAD(vn_file_list);
 
-static vtype_t
-vn_get_sol_type(umode_t mode)
+vtype_t
+vn_mode_to_vtype(mode_t mode)
 {
 	if (S_ISREG(mode))
 		return VREG;
@@ -70,7 +70,36 @@ vn_get_sol_type(umode_t mode)
 		return VCHR;
 
 	return VNON;
-} /* vn_get_sol_type() */
+} /* vn_mode_to_vtype() */
+EXPORT_SYMBOL(vn_mode_to_vtype);
+
+mode_t
+vn_vtype_to_mode(vtype_t vtype)
+{
+	if (vtype == VREG)
+		return S_IFREG;
+
+	if (vtype == VDIR)
+		return S_IFDIR;
+
+	if (vtype == VCHR)
+		return S_IFCHR;
+
+	if (vtype == VBLK)
+		return S_IFBLK;
+
+	if (vtype == VFIFO)
+		return S_IFIFO;
+
+	if (vtype == VLNK)
+		return S_IFLNK;
+
+	if (vtype == VSOCK)
+		return S_IFSOCK;
+
+	return VNON;
+} /* vn_vtype_to_mode() */
+EXPORT_SYMBOL(vn_vtype_to_mode);
 
 vnode_t *
 vn_alloc(int flag)
@@ -150,7 +179,7 @@ vn_open(const char *path, uio_seg_t seg, int flags, int mode,
 	mapping_set_gfp_mask(fp->f_mapping, saved_gfp & ~(__GFP_IO|__GFP_FS));
 
 	mutex_enter(&vp->v_lock);
-	vp->v_type = vn_get_sol_type(stat.mode);
+	vp->v_type = vn_mode_to_vtype(stat.mode);
 	vp->v_file = fp;
 	vp->v_gfp_mask = saved_gfp;
 	*vpp = vp;
@@ -439,7 +468,7 @@ vn_getattr(vnode_t *vp, vattr_t *vap, int flags, void *x3, void *x4)
 	if (rc)
 		SRETURN(-rc);
 
-	vap->va_type          = vn_get_sol_type(stat.mode);
+	vap->va_type          = vn_mode_to_vtype(stat.mode);
 	vap->va_mode          = stat.mode;
 	vap->va_uid           = stat.uid;
 	vap->va_gid           = stat.gid;
@@ -539,7 +568,7 @@ vn_getf(int fd)
 		SGOTO(out_vnode, rc);
 
 	mutex_enter(&vp->v_lock);
-	vp->v_type = vn_get_sol_type(stat.mode);
+	vp->v_type = vn_mode_to_vtype(stat.mode);
 	vp->v_file = lfp;
 	mutex_exit(&vp->v_lock);
 
-- 
2.40.0