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$FreeBSD: releng/10.2/share/man/man9/insmntque.9 209031 2010-06-11 06:03:47Z uqs $
.Dd September 8, 2008 .Dt INSMNTQUE 9 .Os .Sh NAME .Nm insmntque , .Nm insmntque1 .Nd "associate a vnode with a mount" .Sh SYNOPSIS n sys/param.h n sys/vnode.h .Ft int .Fn insmntque "struct vnode *vp" "struct mount *mp" .Ft int .Fn insmntque1 "struct vnode *vp" "struct mount *mp" "void (*dtr)(struct vnode *, void *)" "void *dtr_arg" .Sh DESCRIPTION The .Fn insmntque function associates a vnode with a mount. This includes updating .Va v_mount for the vnode, and inserting the vnode into the mount's vnode list.
p The mount reference count is incremented for each vnode added to the mount, and that reference is decremented by .Xr vgone 9 .
p The mount's interlock is held while the vnode is inserted. For MP-safe file systems, the vnode must be exclusively locked.
p On failure, .Fn insmntque calls .Xr vgone 9 on the supplied vnode, and then drops the vnode lock and reference. If more elaborated cleanup after .Fn insmntque failure is needed, the .Fn insmntque1 function may be used instead. The .Fa 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 .Fa dtr . The .Fa dtr_arg argument is the second, supplying any additional context needed. .Sh RETURN VALUES The .Fn insmntque function will always return 0, unless the file system is currently being unmounted in which case it may return .Dv EBUSY . Also, .Fn insmntque may be forced to insert the vnode into the mount's vnode list by setting the .Va VV_FORCEINSMQ flag in the vnode .Va v_flag , even if the file system is being unmounted. .Sh SEE ALSO .Xr vgone 9 .Sh AUTHORS This manual page was written by .An Chad David Aq davidc@acns.ab.ca .