vfs_root(9) [freebsd man page]

VFS_ROOT(9)						   BSD Kernel Developer's Manual					       VFS_ROOT(9)

NAME

     VFS_ROOT -- return the root vnode of a file system

SYNOPSIS

     #include <sys/param.h>
     #include <sys/mount.h>
     #include <sys/vnode.h>

     int
     VFS_ROOT(struct mount *mp, int flags, struct vnode **vpp);

DESCRIPTION

     Return a locked vnode for the root directory of the file system.

     Its arguments are:

     mp     The file system.

     flags  The lock type.  Could be LK_EXCLUSIVE or LK_SHARED.  File system is free to ignore the flags argument and instead acquire an exclusive
	    lock.

     vpp    Return parameter for the root vnode.

SEE ALSO

     VFS(9), vnode(9)

AUTHORS

     This manual page was written by Doug Rabson.

BSD
								   May 23, 2009 							       BSD

VFS_VGET(9)						   BSD Kernel Developer's Manual					       VFS_VGET(9)

NAME

     VFS_VGET -- convert an inode number to a vnode

SYNOPSIS

     #include <sys/param.h>
     #include <sys/mount.h>
     #include <sys/vnode.h>

     int
     VFS_VGET(struct mount *mp, ino_t ino, int flags, struct vnode **vpp);

DESCRIPTION

     The VFS_VGET() looks up or creates a vnode from a (mount, inode#) tupple.

     Its arguments are:

     mp     The mount point.

     ino    The inode representing the file.  This is a unique number assigned by the file system when vnodes are first created.

     flags  Additional locking flags to pass through to vget(9).

     vpp    Return parameter for the vnode.

     This is an optional file system entry-point for file systems mainly intended for NFS server use, but many file systems use it internally in
     VOP_LOOKUP(9) and similar.

     If the file system does not support this call, then it should return EOPNOTSUPP.

     Please see ffs_vget() in sys/ufs/ffs/ffs_vfsops.c for the canonical example.

SEE ALSO

     VFS(9), vget(9), vnode(9)

AUTHORS

     This manual page was written by Doug Rabson.

BSD
								  January 7, 2005							       BSD