vcount(9) [debian man page]

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

NAME

     vcount, count_dev -- get total number of references to a device

SYNOPSIS

     #include <sys/param.h>
     #include <sys/time.h>
     #include <sys/conf.h>
     #include <sys/vnode.h>

     int
     vcount(struct vnode *vp);

     int
     count_dev(dev_t dev);

DESCRIPTION

     vcount() is used to get the number of references to a particular device.  It allows for the fact that multiple vnodes may reference the same
     device.  count_dev() does the same thing as vcount(), but takes a dev_t rather than a struct vnode pointer as an argument.

RETURN VALUES

     vcount() and count_dev() both return the number of references to the device.

SEE ALSO

     VFS(9), vnode(9)

AUTHORS

     This manual page was written by Andrew Stevenson.

BSD
								 February 6, 2001							       BSD

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

NAME

     VOP_LINK -- create a new name for a file

SYNOPSIS

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

     int
     VOP_LINK(struct vnode *dvp, struct vnode *vp, struct componentname *cnp);

DESCRIPTION

     This links a new name in the specified directory to an existing file.

     Its arguments are:

     dvp       The vnode of the directory.

     vp        The vnode of the file to be linked.

     cnp       Pathname information about the file.

     The pathname info should not be released on exit because it is done by the caller.  The directory and file vnodes should not be released on
     exit.

LOCKS

     VOP_LINK() expects the directory and file vnodes to be locked on entry and will leave the vnodes locked on return.

RETURN VALUES

     Zero is returned if the file was linked successfully, otherwise an error is returned.

ERRORS

     [EMLINK]		The file has too many links.

     [EPERM]		The file is immutable.

     [EXDEV]		A hard link is not possible between different file systems.

SEE ALSO

     vn_lock(9), vnode(9)

AUTHORS

     This manual page was originally written by Doug Rabson.

BSD
								   July 24, 1996							       BSD