z/OS UNIX System Services File System Interface Reference
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Specific considerations for vnode operations

z/OS UNIX System Services File System Interface Reference
SA23-2285-00

The following vnode operations contain parameters that may contain 64-bit addresses or point to structures that contain 64-bit addresses. Each of these operations has Fuio as an input parameter, which may point to a 64-bit user buffer:
  • vn_rdwr
  • vn_readdir
  • vn_readlink
  • vn_sndrcv
  • vn_sendtorcvfrom
  • vn_readwritev—the IO vectors passed may be in an IOV or an IOV64 structure.
  • vn_srmsg—the message header passed may be an MSGH or an MSGH64 structure.
Note:
  1. MSGH64 and IOV64 are always used together.
  2. Whenever FuioAddr64 is on (and FuioRealPage is off):
    • FuioBuff64Vaddr points to a buffer, an IOV64, or an MSGH64.
    • A MSGH64 always points to an IOV64.
Parent topic: PFS support for 64-bit virtual addressing

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