IFS - mini-FDS Helper Routines

Installable File Systems for OS/2
Installable File System Mechanism Installable File System Overview Extended Attributes FSD File Image FSD Initialization IFS Commands File System Function Calls FSD System Interfaces FSD Calling Conventions and Requirements FS Service Routines FS Helper Functions Remote IPL / Bootable IFS mini-FDS Entry Points mini-FDS Helper Routines

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The following table summaries the mini-FSD Helper Routines:

FSD Helper	Description
MFSH_CALLRM	Put machine in real mode
MFSH_DOVOLIO	Read sectors
MFSH_INTERR	Internal error
MFSH_LOCK	Lock segment
MFSH_PHYSTOVIRT	Convert physical to virtual address
MFSH_SEGALLOC	Allocate a segment
MFSH_SEGFREE	Free a segment
MFSH_SEGREALLOC	Change segment size
MFSH_SETBOOTDRIVE	Change boot drive number kept by the OS/2 kernel
MFSH_UNLOCK	Unlock a segment
MFSH_UNPHYSTOVIRT	Mark completion of use of virtual address
MFSH_VIRT2PHYS	Convert virtual to physical address
MFSH_SYSCTL	Do additional system controls

Table 4-2. Summary of mini-FSD Helpers