From b124f6c510c48e1ce8a71ea17a354f49c71fc9a0 Mon Sep 17 00:00:00 2001
From: phk <phk@FreeBSD.org>
Date: Tue, 14 Dec 2004 08:23:18 +0000
Subject: [PATCH] Move the checkdirs() function from vfs_mount.c to
 kern_descrip.c and call it mountcheckdirs().

---
 sys/kern/kern_descrip.c | 48 +++++++++++++++++++++++++++++++++++
 sys/kern/vfs_mount.c    | 55 +++--------------------------------------
 sys/sys/filedesc.h      |  1 +
 3 files changed, 52 insertions(+), 52 deletions(-)

diff --git a/sys/kern/kern_descrip.c b/sys/kern/kern_descrip.c
index 754a3cbe2974..28afe115f5ad 100644
--- a/sys/kern/kern_descrip.c
+++ b/sys/kern/kern_descrip.c
@@ -2256,6 +2256,54 @@ dupfdopen(struct thread *td, struct filedesc *fdp, int indx, int dfd, int mode,
 	/* NOTREACHED */
 }
 
+/*
+ * Scan all active processes to see if any of them have a current
+ * or root directory of `olddp'. If so, replace them with the new
+ * mount point.
+ */
+void
+mountcheckdirs(olddp, newdp)
+	struct vnode *olddp, *newdp;
+{
+	struct filedesc *fdp;
+	struct proc *p;
+	int nrele;
+
+	if (vrefcnt(olddp) == 1)
+		return;
+	sx_slock(&allproc_lock);
+	LIST_FOREACH(p, &allproc, p_list) {
+		mtx_lock(&fdesc_mtx);
+		fdp = p->p_fd;
+		if (fdp == NULL) {
+			mtx_unlock(&fdesc_mtx);
+			continue;
+		}
+		nrele = 0;
+		FILEDESC_LOCK_FAST(fdp);
+		if (fdp->fd_cdir == olddp) {
+			vref(newdp);
+			fdp->fd_cdir = newdp;
+			nrele++;
+		}
+		if (fdp->fd_rdir == olddp) {
+			vref(newdp);
+			fdp->fd_rdir = newdp;
+			nrele++;
+		}
+		FILEDESC_UNLOCK_FAST(fdp);
+		mtx_unlock(&fdesc_mtx);
+		while (nrele--)
+			vrele(olddp);
+	}
+	sx_sunlock(&allproc_lock);
+	if (rootvnode == olddp) {
+		vrele(rootvnode);
+		vref(newdp);
+		rootvnode = newdp;
+	}
+}
+
 struct filedesc_to_leader *
 filedesc_to_leader_alloc(struct filedesc_to_leader *old, struct filedesc *fdp, struct proc *leader)
 {
diff --git a/sys/kern/vfs_mount.c b/sys/kern/vfs_mount.c
index acb44c886245..edd155516038 100644
--- a/sys/kern/vfs_mount.c
+++ b/sys/kern/vfs_mount.c
@@ -73,7 +73,6 @@ __FBSDID("$FreeBSD$");
 #define	ROOTNAME		"root_device"
 #define	VFS_MOUNTARG_SIZE_MAX	(1024 * 64)
 
-static void	checkdirs(struct vnode *olddp, struct vnode *newdp);
 static void	gets(char *cp);
 static int	vfs_domount(struct thread *td, const char *fstype,
 		    char *fspath, int fsflags, void *fsdata);
@@ -784,7 +783,7 @@ vfs_domount(
 		vfs_event_signal(NULL, VQ_MOUNT, 0);
 		if (VFS_ROOT(mp, &newdp, td))
 			panic("mount: lost mount");
-		checkdirs(vp, newdp);
+		mountcheckdirs(vp, newdp);
 		vput(newdp);
 		VOP_UNLOCK(vp, 0, td);
 		if ((mp->mnt_flag & MNT_RDONLY) == 0)
@@ -802,54 +801,6 @@ vfs_domount(
 	return (error);
 }
 
-/*
- * Scan all active processes to see if any of them have a current
- * or root directory of `olddp'. If so, replace them with the new
- * mount point.
- */
-static void
-checkdirs(olddp, newdp)
-	struct vnode *olddp, *newdp;
-{
-	struct filedesc *fdp;
-	struct proc *p;
-	int nrele;
-
-	if (vrefcnt(olddp) == 1)
-		return;
-	sx_slock(&allproc_lock);
-	LIST_FOREACH(p, &allproc, p_list) {
-		mtx_lock(&fdesc_mtx);
-		fdp = p->p_fd;
-		if (fdp == NULL) {
-			mtx_unlock(&fdesc_mtx);
-			continue;
-		}
-		nrele = 0;
-		FILEDESC_LOCK_FAST(fdp);
-		if (fdp->fd_cdir == olddp) {
-			vref(newdp);
-			fdp->fd_cdir = newdp;
-			nrele++;
-		}
-		if (fdp->fd_rdir == olddp) {
-			vref(newdp);
-			fdp->fd_rdir = newdp;
-			nrele++;
-		}
-		FILEDESC_UNLOCK_FAST(fdp);
-		mtx_unlock(&fdesc_mtx);
-		while (nrele--)
-			vrele(olddp);
-	}
-	sx_sunlock(&allproc_lock);
-	if (rootvnode == olddp) {
-		vrele(rootvnode);
-		vref(newdp);
-		rootvnode = newdp;
-	}
-}
-
 /*
  * ---------------------------------------------------------------------
  * Unmount a filesystem.
@@ -991,7 +942,7 @@ dounmount(mp, flags, td)
 	 */
 	if ((flags & MNT_FORCE) && VFS_ROOT(mp, &fsrootvp, td) == 0) {
 		if (mp->mnt_vnodecovered != NULL)
-			checkdirs(fsrootvp, mp->mnt_vnodecovered);
+			mountcheckdirs(fsrootvp, mp->mnt_vnodecovered);
 		if (fsrootvp == rootvnode) {
 			vrele(rootvnode);
 			rootvnode = NULL;
@@ -1008,7 +959,7 @@ dounmount(mp, flags, td)
 		/* Undo cdir/rdir and rootvnode changes made above. */
 		if ((flags & MNT_FORCE) && VFS_ROOT(mp, &fsrootvp, td) == 0) {
 			if (mp->mnt_vnodecovered != NULL)
-				checkdirs(mp->mnt_vnodecovered, fsrootvp);
+				mountcheckdirs(mp->mnt_vnodecovered, fsrootvp);
 			if (rootvnode == NULL) {
 				rootvnode = fsrootvp;
 				vref(rootvnode);
diff --git a/sys/sys/filedesc.h b/sys/sys/filedesc.h
index 00e3df23758a..5726768210ea 100644
--- a/sys/sys/filedesc.h
+++ b/sys/sys/filedesc.h
@@ -172,6 +172,7 @@ struct filedesc_to_leader *
 	filedesc_to_leader_alloc(struct filedesc_to_leader *old,
 	    struct filedesc *fdp, struct proc *leader);
 int	getvnode(struct filedesc *fdp, int fd, struct file **fpp);
+void	mountcheckdirs(struct vnode *olddp, struct vnode *newdp);
 void	setugidsafety(struct thread *td);
 
 static __inline struct file *