insmntque man page on FreeBSD

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

NAME
     insmntque, insmntque1 — associate a vnode with a mount

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

     int
     insmntque(struct vnode *vp, struct mount *mp);

     int
     insmntque1(struct vnode *vp, struct mount *mp,
	 void (*dtr)(struct vnode *, void *), void *dtr_arg);

DESCRIPTION
     The insmntque() function associates a vnode with a mount.	This includes
     updating v_mount for the vnode, and inserting the vnode into the mount's
     vnode list.

     The mount reference count is incremented for each vnode added to the
     mount, and that reference is decremented by vgone(9).

     The mount's interlock is held while the vnode is inserted.	 For MP-safe
     file systems, the vnode must be exclusively locked.

     On failure, insmntque() calls vgone(9) on the supplied vnode, and then
     drops the vnode lock and reference.  If more elaborated cleanup after
     insmntque() failure is needed, the insmntque1() function may be used
     instead.  The dtr argument is a pointer to a function that is called on
     failure.  This function may perform any custom cleanup.  The vnode
     pointer is supplied as the first argument to dtr.	The dtr_arg argument
     is the second, supplying any additional context needed.

RETURN VALUES
     The insmntque() function will always return 0, unless the file system is
     currently being unmounted in which case it may return EBUSY.  Also,
     insmntque() may be forced to insert the vnode into the mount's vnode list
     by setting the VV_FORCEINSMQ flag in the vnode v_flag, even if the file
     system is being unmounted.

SEE ALSO
     vgone(9)

AUTHORS
     This manual page was written by Chad David ⟨davidc@acns.ab.ca⟩.

BSD			       September 8, 2008			   BSD
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