425 lines
10 KiB
C
425 lines
10 KiB
C
/*
|
|
* parsenfsfh.c - portable parser for NFS file handles
|
|
* uses all sorts of heuristics
|
|
*
|
|
* Jeffrey C. Mogul
|
|
* Digital Equipment Corporation
|
|
* Western Research Laboratory
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] =
|
|
"@(#) $Header: parsenfsfh.c,v 1.14 97/06/15 13:20:27 leres Exp $ (LBL)";
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <ctype.h>
|
|
#ifdef HAVE_MEMORY_H
|
|
#include <memory.h>
|
|
#endif
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "interface.h"
|
|
#include "nfsfh.h"
|
|
|
|
/*
|
|
* This routine attempts to parse a file handle (in network byte order),
|
|
* using heuristics to guess what kind of format it is in. See the
|
|
* file "fhandle_layouts" for a detailed description of the various
|
|
* patterns we know about.
|
|
*
|
|
* The file handle is parsed into our internal representation of a
|
|
* file-system id, and an internal representation of an inode-number.
|
|
*/
|
|
|
|
#define FHT_UNKNOWN 0
|
|
#define FHT_AUSPEX 1
|
|
#define FHT_DECOSF 2
|
|
#define FHT_IRIX4 3
|
|
#define FHT_IRIX5 4
|
|
#define FHT_SUNOS3 5
|
|
#define FHT_SUNOS4 6
|
|
#define FHT_ULTRIX 7
|
|
#define FHT_VMSUCX 8
|
|
#define FHT_SUNOS5 9
|
|
#define FHT_AIX32 10
|
|
#define FHT_HPUX9 11
|
|
|
|
#ifdef ultrix
|
|
/* Nasty hack to keep the Ultrix C compiler from emitting bogus warnings */
|
|
#define XFF(x) ((u_int32_t)(x))
|
|
#else
|
|
#define XFF(x) (x)
|
|
#endif
|
|
|
|
#define make_uint32(msb,b,c,lsb)\
|
|
(XFF(lsb) + (XFF(c)<<8) + (XFF(b)<<16) + (XFF(msb)<<24))
|
|
|
|
#define make_uint24(msb,b, lsb)\
|
|
(XFF(lsb) + (XFF(b)<<8) + (XFF(msb)<<16))
|
|
|
|
#define make_uint16(msb,lsb)\
|
|
(XFF(lsb) + (XFF(msb)<<8))
|
|
|
|
#ifdef __alpha
|
|
/* or other 64-bit systems */
|
|
#define make_uint48(msb,b,c,d,e,lsb)\
|
|
((lsb) + ((e)<<8) + ((d)<<16) + ((c)<<24) + ((b)<<32) + ((msb)<<40))
|
|
#else
|
|
/* on 32-bit systems ignore high-order bits */
|
|
#define make_uint48(msb,b,c,d,e,lsb)\
|
|
((lsb) + ((e)<<8) + ((d)<<16) + ((c)<<24))
|
|
#endif
|
|
|
|
static int is_UCX(unsigned char *);
|
|
|
|
void
|
|
Parse_fh(fh, len, fsidp, inop, osnamep, fsnamep, ourself)
|
|
register caddr_t *fh;
|
|
int len;
|
|
my_fsid *fsidp;
|
|
ino_t *inop;
|
|
char **osnamep; /* if non-NULL, return OS name here */
|
|
char **fsnamep; /* if non-NULL, return server fs name here (for VMS) */
|
|
int ourself; /* true if file handle was generated on this host */
|
|
{
|
|
register unsigned char *fhp = (unsigned char *)fh;
|
|
u_int32_t temp;
|
|
int fhtype = FHT_UNKNOWN;
|
|
|
|
if (ourself) {
|
|
/* File handle generated on this host, no need for guessing */
|
|
#if defined(IRIX40)
|
|
fhtype = FHT_IRIX4;
|
|
#endif
|
|
#if defined(IRIX50)
|
|
fhtype = FHT_IRIX5;
|
|
#endif
|
|
#if defined(IRIX51)
|
|
fhtype = FHT_IRIX5;
|
|
#endif
|
|
#if defined(SUNOS4)
|
|
fhtype = FHT_SUNOS4;
|
|
#endif
|
|
#if defined(SUNOS5)
|
|
fhtype = FHT_SUNOS5;
|
|
#endif
|
|
#if defined(ultrix)
|
|
fhtype = FHT_ULTRIX;
|
|
#endif
|
|
#if defined(__osf__)
|
|
fhtype = FHT_DECOSF;
|
|
#endif
|
|
}
|
|
/*
|
|
* This is basically a big decision tree
|
|
*/
|
|
else if ((fhp[0] == 0) && (fhp[1] == 0)) {
|
|
/* bytes[0,1] == (0,0); rules out Ultrix, IRIX5, SUNOS5 */
|
|
/* probably rules out HP-UX, AIX unless they allow major=0 */
|
|
if ((fhp[2] == 0) && (fhp[3] == 0)) {
|
|
/* bytes[2,3] == (0,0); must be Auspex */
|
|
/* XXX or could be Ultrix+MASSBUS "hp" disk? */
|
|
fhtype = FHT_AUSPEX;
|
|
}
|
|
else {
|
|
/*
|
|
* bytes[2,3] != (0,0); rules out Auspex, could be
|
|
* DECOSF, SUNOS4, or IRIX4
|
|
*/
|
|
if ((fhp[4] != 0) && (fhp[5] == 0) &&
|
|
(fhp[8] == 12) && (fhp[9] == 0)) {
|
|
/* seems to be DECOSF, with minor == 0 */
|
|
fhtype = FHT_DECOSF;
|
|
}
|
|
else {
|
|
/* could be SUNOS4 or IRIX4 */
|
|
/* XXX the test of fhp[5] == 8 could be wrong */
|
|
if ((fhp[4] == 0) && (fhp[5] == 8) && (fhp[6] == 0) &&
|
|
(fhp[7] == 0)) {
|
|
/* looks like a length, not a file system typecode */
|
|
fhtype = FHT_IRIX4;
|
|
}
|
|
else {
|
|
/* by elimination */
|
|
fhtype = FHT_SUNOS4;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
/*
|
|
* bytes[0,1] != (0,0); rules out Auspex, IRIX4, SUNOS4
|
|
* could be IRIX5, DECOSF, UCX, Ultrix, SUNOS5
|
|
* could be AIX, HP-UX
|
|
*/
|
|
if ((fhp[2] == 0) && (fhp[3] == 0)) {
|
|
/*
|
|
* bytes[2,3] == (0,0); rules out OSF, probably not UCX
|
|
* (unless the exported device name is just one letter!),
|
|
* could be Ultrix, IRIX5, AIX, or SUNOS5
|
|
* might be HP-UX (depends on their values for minor devs)
|
|
*/
|
|
/*XXX we probably only need to test of these two bytes */
|
|
if ((fhp[21] == 0) && (fhp[23] == 0)) {
|
|
fhtype = FHT_ULTRIX;
|
|
}
|
|
else {
|
|
/* Could be SUNOS5/IRIX5, maybe AIX */
|
|
/* XXX no obvious difference between SUNOS5 and IRIX5 */
|
|
if (fhp[9] == 10)
|
|
fhtype = FHT_SUNOS5;
|
|
/* XXX what about AIX? */
|
|
}
|
|
}
|
|
else {
|
|
/*
|
|
* bytes[2,3] != (0,0); rules out Ultrix, could be
|
|
* DECOSF, SUNOS5, IRIX5, AIX, HP-UX, or UCX
|
|
*/
|
|
if ((fhp[8] == 12) && (fhp[9] == 0)) {
|
|
fhtype = FHT_DECOSF;
|
|
}
|
|
else if ((fhp[8] == 0) && (fhp[9] == 10)) {
|
|
/* could be SUNOS5/IRIX5, AIX, HP-UX */
|
|
if ((fhp[7] == 0) && (fhp[6] == 0) &&
|
|
(fhp[5] == 0) && (fhp[4] == 0)) {
|
|
/* XXX is this always true of HP-UX? */
|
|
fhtype = FHT_HPUX9;
|
|
}
|
|
else if (fhp[7] == 2) {
|
|
/* This would be MNT_NFS on AIX, which is impossible */
|
|
fhtype = FHT_SUNOS5; /* or maybe IRIX5 */
|
|
}
|
|
else {
|
|
/*
|
|
* XXX Could be SUNOS5/IRIX5 or AIX. I don't
|
|
* XXX see any way to disambiguate these, so
|
|
* XXX I'm going with the more likely guess.
|
|
* XXX Sorry, Big Blue.
|
|
*/
|
|
fhtype = FHT_SUNOS5; /* or maybe IRIX5 */
|
|
}
|
|
}
|
|
else {
|
|
if (is_UCX(fhp)) {
|
|
fhtype = FHT_VMSUCX;
|
|
}
|
|
else {
|
|
fhtype = FHT_UNKNOWN;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* XXX still needs to handle SUNOS3 */
|
|
|
|
switch (fhtype) {
|
|
case FHT_AUSPEX:
|
|
fsidp->Fsid_dev.Minor = fhp[7];
|
|
fsidp->Fsid_dev.Major = fhp[6];
|
|
fsidp->fsid_code = 0;
|
|
|
|
temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
|
|
*inop = temp;
|
|
|
|
if (osnamep)
|
|
*osnamep = "Auspex";
|
|
break;
|
|
|
|
case FHT_DECOSF:
|
|
fsidp->fsid_code = make_uint32(fhp[7], fhp[6], fhp[5], fhp[4]);
|
|
/* XXX could ignore 3 high-order bytes */
|
|
|
|
temp = make_uint32(fhp[3], fhp[2], fhp[1], fhp[0]);
|
|
fsidp->Fsid_dev.Minor = temp & 0xFFFFF;
|
|
fsidp->Fsid_dev.Major = (temp>>20) & 0xFFF;
|
|
|
|
temp = make_uint32(fhp[15], fhp[14], fhp[13], fhp[12]);
|
|
*inop = temp;
|
|
if (osnamep)
|
|
*osnamep = "OSF";
|
|
break;
|
|
|
|
case FHT_IRIX4:
|
|
fsidp->Fsid_dev.Minor = fhp[3];
|
|
fsidp->Fsid_dev.Major = fhp[2];
|
|
fsidp->fsid_code = 0;
|
|
|
|
temp = make_uint32(fhp[8], fhp[9], fhp[10], fhp[11]);
|
|
*inop = temp;
|
|
|
|
if (osnamep)
|
|
*osnamep = "IRIX4";
|
|
break;
|
|
|
|
case FHT_IRIX5:
|
|
fsidp->Fsid_dev.Minor = make_uint16(fhp[2], fhp[3]);
|
|
fsidp->Fsid_dev.Major = make_uint16(fhp[0], fhp[1]);
|
|
fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]);
|
|
|
|
temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
|
|
*inop = temp;
|
|
|
|
if (osnamep)
|
|
*osnamep = "IRIX5";
|
|
break;
|
|
|
|
case FHT_SUNOS3:
|
|
if (osnamep)
|
|
*osnamep = "SUNOS3";
|
|
break;
|
|
|
|
case FHT_SUNOS4:
|
|
fsidp->Fsid_dev.Minor = fhp[3];
|
|
fsidp->Fsid_dev.Major = fhp[2];
|
|
fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]);
|
|
|
|
temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
|
|
*inop = temp;
|
|
|
|
if (osnamep)
|
|
*osnamep = "SUNOS4";
|
|
break;
|
|
|
|
case FHT_SUNOS5:
|
|
temp = make_uint16(fhp[0], fhp[1]);
|
|
fsidp->Fsid_dev.Major = (temp>>2) & 0x3FFF;
|
|
temp = make_uint24(fhp[1], fhp[2], fhp[3]);
|
|
fsidp->Fsid_dev.Minor = temp & 0x3FFFF;
|
|
fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]);
|
|
|
|
temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
|
|
*inop = temp;
|
|
|
|
if (osnamep)
|
|
*osnamep = "SUNOS5";
|
|
break;
|
|
|
|
case FHT_ULTRIX:
|
|
fsidp->fsid_code = 0;
|
|
fsidp->Fsid_dev.Minor = fhp[0];
|
|
fsidp->Fsid_dev.Major = fhp[1];
|
|
|
|
temp = make_uint32(fhp[7], fhp[6], fhp[5], fhp[4]);
|
|
*inop = temp;
|
|
if (osnamep)
|
|
*osnamep = "Ultrix";
|
|
break;
|
|
|
|
case FHT_VMSUCX:
|
|
/* No numeric file system ID, so hash on the device-name */
|
|
if (sizeof(*fsidp) >= 14) {
|
|
if (sizeof(*fsidp) > 14)
|
|
memset((char *)fsidp, 0, sizeof(*fsidp));
|
|
/* just use the whole thing */
|
|
memcpy((char *)fsidp, (char *)fh, 14);
|
|
}
|
|
else {
|
|
u_int32_t tempa[4]; /* at least 16 bytes, maybe more */
|
|
|
|
memset((char *)tempa, 0, sizeof(tempa));
|
|
memcpy((char *)tempa, (char *)fh, 14); /* ensure alignment */
|
|
fsidp->Fsid_dev.Minor = tempa[0] + (tempa[1]<<1);
|
|
fsidp->Fsid_dev.Major = tempa[2] + (tempa[3]<<1);
|
|
fsidp->fsid_code = 0;
|
|
}
|
|
|
|
/* VMS file ID is: (RVN, FidHi, FidLo) */
|
|
*inop = make_uint32(fhp[26], fhp[27], fhp[23], fhp[22]);
|
|
|
|
/* Caller must save (and null-terminate?) this value */
|
|
if (fsnamep)
|
|
*fsnamep = (char *)&(fhp[1]);
|
|
|
|
if (osnamep)
|
|
*osnamep = "VMS";
|
|
break;
|
|
|
|
case FHT_AIX32:
|
|
fsidp->Fsid_dev.Minor = make_uint16(fhp[2], fhp[3]);
|
|
fsidp->Fsid_dev.Major = make_uint16(fhp[0], fhp[1]);
|
|
fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]);
|
|
|
|
temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
|
|
*inop = temp;
|
|
|
|
if (osnamep)
|
|
*osnamep = "AIX32";
|
|
break;
|
|
|
|
case FHT_HPUX9:
|
|
fsidp->Fsid_dev.Major = fhp[0];
|
|
temp = make_uint24(fhp[1], fhp[2], fhp[3]);
|
|
fsidp->Fsid_dev.Minor = temp;
|
|
fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]);
|
|
|
|
temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
|
|
*inop = temp;
|
|
|
|
if (osnamep)
|
|
*osnamep = "HPUX9";
|
|
break;
|
|
|
|
case FHT_UNKNOWN:
|
|
#ifdef DEBUG
|
|
{
|
|
/* XXX debugging */
|
|
int i;
|
|
for (i = 0; i < 32; i++)
|
|
(void)fprintf(stderr, "%x.", fhp[i]);
|
|
(void)fprintf(stderr, "\n");
|
|
}
|
|
#endif
|
|
/* XXX for now, give "bogus" values to aid debugging */
|
|
fsidp->fsid_code = 0;
|
|
fsidp->Fsid_dev.Minor = 257;
|
|
fsidp->Fsid_dev.Major = 257;
|
|
*inop = 1;
|
|
|
|
/* display will show this string instead of (257,257) */
|
|
if (fsnamep)
|
|
*fsnamep = "Unknown";
|
|
|
|
if (osnamep)
|
|
*osnamep = "Unknown";
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Is this a VMS UCX file handle?
|
|
* Check for:
|
|
* (1) leading code byte [XXX not yet]
|
|
* (2) followed by string of printing chars & spaces
|
|
* (3) followed by string of nulls
|
|
*/
|
|
static int
|
|
is_UCX(fhp)
|
|
unsigned char *fhp;
|
|
{
|
|
register int i;
|
|
int seen_null = 0;
|
|
|
|
for (i = 1; i < 14; i++) {
|
|
if (isprint(fhp[i])) {
|
|
if (seen_null)
|
|
return(0);
|
|
else
|
|
continue;
|
|
}
|
|
else if (fhp[i] == 0) {
|
|
seen_null = 1;
|
|
continue;
|
|
}
|
|
else
|
|
return(0);
|
|
}
|
|
|
|
return(1);
|
|
}
|