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authormsmith <msmith@FreeBSD.org>1998-03-01 22:46:53 +0000
committermsmith <msmith@FreeBSD.org>1998-03-01 22:46:53 +0000
commit950d32131bcda63f4d849362c64123e28600ae2c (patch)
tree20dcb6f46f936b41e0a16f253d5a11772bfbfd92 /sys/fs/umapfs
parent611da89e2cf7f2301c19b2e6115e9668d92f3d69 (diff)
downloadFreeBSD-src-950d32131bcda63f4d849362c64123e28600ae2c.zip
FreeBSD-src-950d32131bcda63f4d849362c64123e28600ae2c.tar.gz
The intent is to get rid of WILLRELE in vnode_if.src by making
a complement to all ops that return a vpp, VFS_VRELE. This is initially only for file systems that implement the following ops that do a WILLRELE: vop_create, vop_whiteout, vop_mknod, vop_remove, vop_link, vop_rename, vop_mkdir, vop_rmdir, vop_symlink This is initial DNA that doesn't do anything yet. VFS_VRELE is implemented but not called. A default vfs_vrele was created for fs implementations that use the standard vnode management routines. VFS_VRELE implementations were made for the following file systems: Standard (vfs_vrele) ffs mfs nfs msdosfs devfs ext2fs Custom union umapfs Just EOPNOTSUPP fdesc procfs kernfs portal cd9660 These implementations may change as VOP changes are implemented. In the next phase, in the vop implementations calls to vrele and the vrele part of vput will be moved to the top layer vfs_vnops and made visible to all layers. vput will be replaced by unlock in these cases. Unlocking will still be done in the per fs layer but the refcount decrement will be triggered at the top because it doesn't hurt to hold a vnode reference a little longer. This will have minimal impact on the structure of the existing code. This will only be done for vnode arguments that are released by the various fs vop implementations. Wider use of VFS_VRELE will likely require restructuring of the code. Reviewed by: phk, dyson, terry et. al. Submitted by: Michael Hancock <michaelh@cet.co.jp>
Diffstat (limited to 'sys/fs/umapfs')
-rw-r--r--sys/fs/umapfs/umap_vfsops.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/sys/fs/umapfs/umap_vfsops.c b/sys/fs/umapfs/umap_vfsops.c
index d9dce5c..8c1b705 100644
--- a/sys/fs/umapfs/umap_vfsops.c
+++ b/sys/fs/umapfs/umap_vfsops.c
@@ -35,7 +35,7 @@
*
* @(#)umap_vfsops.c 8.8 (Berkeley) 5/14/95
*
- * $Id: umap_vfsops.c,v 1.19 1998/02/03 14:30:01 kato Exp $
+ * $Id: umap_vfsops.c,v 1.20 1998/02/07 01:34:32 kato Exp $
*/
/*
@@ -72,6 +72,7 @@ static int umapfs_unmount __P((struct mount *mp, int mntflags,
struct proc *p));
static int umapfs_vget __P((struct mount *mp, ino_t ino,
struct vnode **vpp));
+static int umapfs_vrele __P((struct mount *mp, struct vnode *vp));
static int umapfs_vptofh __P((struct vnode *vp, struct fid *fhp));
/*
@@ -393,6 +394,20 @@ umapfs_vget(mp, ino, vpp)
return (VFS_VGET(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, ino, vpp));
}
+/*
+ * Complement to all vpp returning ops.
+ * XXX - initially only to get rid of WILLRELE.
+ */
+/* ARGSUSED */
+static int
+umapfs_vrele(mp, vp)
+ struct mount *mp;
+ struct vnode *vp;
+{
+ vrele(vp);
+ return (0);
+}
+
static int
umapfs_fhtovp(mp, fidp, nam, vpp, exflagsp, credanonp)
struct mount *mp;
@@ -423,6 +438,7 @@ static struct vfsops umap_vfsops = {
umapfs_statfs,
umapfs_sync,
umapfs_vget,
+ umapfs_vrele,
umapfs_fhtovp,
umapfs_vptofh,
umapfs_init,
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