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.Dd $Mdocdate: June 4 2013 $ .Dt GETDEVVP 9 .Os .Sh NAME .Nm getdevvp , .Nm bdevvp , .Nm cdevvp .Nd create a vnode for a device .Sh SYNOPSIS n sys/param.h n sys/vnode.h .Ft int .Fn getdevvp "dev_t dev" "struct vnode **vpp" "enum vtype type" .Ft int .Fn bdevvp "dev_t dev" "struct vnode **vpp" .Ft int .Fn cdevvp "dev_t dev" "struct vnode **vpp" .Sh DESCRIPTION The .Fn getdevvp function creates a vnode for a device of type .Fa type with a device number of .Fa dev , and returns a pointer to it in .Fa vpp .
p Its arguments are: l -tag -width "rootrefs" t Fa dev The device number of the desired device. t Fa vpp Where the vnode will be returned on success. t Fa type The type of device, either: l -tag -width "VBLK" t Dv VBLK For a block device, or t Dv VCHR for a character device. .El .El
p .Fn bdevvp and .Fn cdevvp use getdevvp internally, specifying the third argument. .Fn bdevvp will create a vnode for a block device, and is used for the root file system and swap areas, among other things. .Fn cdevvp will create a vnode for a character device and is used in console handling. .Sh RETURN VALUES All functions return 0 on success. If an error occurs, vpp will point to a NULLVP. See .Xr getnewvnode 9 for further return values. .Sh SEE ALSO .Xr getnewvnode 9 , .Xr vnode 9