/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 * 
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

/*
 * afs_util.c - miscellaneous AFS client utility functions
 *
 * Implements:
 */
#include <afsconfig.h>
#include "../afs/param.h"

RCSID("$Header: /cvs/openafs/src/afs/afs_util.c,v 1.5.4.6 2003/05/23 06:52:16 shadow Exp $");

#include "../afs/stds.h"
#include "../afs/sysincludes.h"	/* Standard vendor system headers */

#if !defined(UKERNEL)
#if !defined(AFS_LINUX20_ENV)
#include <net/if.h>
#endif
#include <netinet/in.h>

#ifdef AFS_SGI62_ENV
#include "../h/hashing.h"
#endif
#if !defined(AFS_HPUX110_ENV) && !defined(AFS_LINUX20_ENV) && !defined(AFS_DARWIN60_ENV)
#include <netinet/in_var.h>
#endif /* ! AFS_HPUX110_ENV */
#endif /* !defined(UKERNEL) */

#include "../afs/afsincludes.h"	/* Afs-based standard headers */
#include "../afs/afs_stats.h"   /* afs statistics */

#if	defined(AFS_SUN56_ENV)
#include <inet/led.h>
#include <inet/common.h>
#if     defined(AFS_SUN58_ENV)
#include <netinet/ip6.h>
#endif
#include <inet/ip.h>
#endif

#if	defined(AFS_AIX_ENV)
#include <sys/fp_io.h>
#endif

extern struct volume *afs_volumes[NVOLS];

char *afs_cv2string(char *ttp, afs_uint32 aval)
{
    register char *tp = ttp;
    register int  i;
    int any;
    
    AFS_STATCNT(afs_cv2string);
    any = 0;
    *(--tp) = 0;
    while (aval != 0) {
	i = aval % 10;
	*(--tp) = '0' + i;
	aval /= 10;
	any = 1;
    }
    if (!any)
	*(--tp) = '0';
    return tp;

} /*afs_cv2string*/

char *afs_strchr(char *s, int c)
{
    char *p;
   
    for (p = s; *p; p++)
      if (*p == c)
	return p;
    return NULL;
}

int afs_strcasecmp(char *s1, char *s2)
{
    while (*s1 && *s2) {
	char c1, c2;

	c1 = *s1++;
	c2 = *s2++;
	if (c1 >= 'A' && c1 <= 'Z') c1 += 0x20;
	if (c2 >= 'A' && c2 <= 'Z') c2 += 0x20;
	if (c1 != c2)
	    return c1-c2;
    }

    return *s1 - *s2;
}

char *afs_strdup(char *s)
{
    char *n;
    int cc;

    cc = strlen(s) + 1;
    n = (char *) afs_osi_Alloc(cc);
    if (n)
	memcpy(n, s, cc);

    return n;
}

void print_internet_address(char *preamble, struct srvAddr *sa,
			    char *postamble, int flag)
{
    register struct server *aserver = sa->server;
    char *ptr = "\n";
    afs_uint32 address;
    
    AFS_STATCNT(print_internet_address);
    address = ntohl(sa->sa_ip);
    if (aserver->flags & SRVR_MULTIHOMED) {
	if (flag == 1) {	/* server down mesg */
	    if (!(aserver->flags & SRVR_ISDOWN))
		ptr = " (multi-homed address; other same-host interfaces maybe up)\n";
	    else
		ptr = " (all multi-homed ip addresses down for the server)\n";
	} else if (flag == 2) {	/* server up mesg */
	    ptr = " (multi-homed address; other same-host interfaces may still be down)\n";
	}
    }
    afs_warn("%s%d.%d.%d.%d in cell %s%s%s",
	   preamble, (address >> 24), (address >> 16) & 0xff, (address >> 8) & 0xff, (address) & 0xff,
	   aserver->cell->cellName, postamble, ptr);
    afs_warnuser("%s%d.%d.%d.%d in cell %s%s%s",
	    preamble, (address >> 24), (address >> 16) & 0xff, (address >> 8) & 0xff, (address) & 0xff,
	    aserver->cell->cellName, postamble, ptr);

} /*print_internet_address*/



/* * * * * * *
 * this code badly needs to be cleaned up...  too many ugly ifdefs.
 * XXX
 */
extern afs_int32 afs_showflags;

afs_warn(a,b,c,d,e,f,g,h,i,j)
char *a;
#if defined(AFS_USE_VOID_PTR)
void *b, *c, *d, *e, *f, *g, *h, *i, *j;
#else
long b,c,d,e,f,g,h,i,j;
#endif
{
    AFS_STATCNT(afs_warn);
    
    if (afs_showflags & GAGCONSOLE)
    {
#if defined(AFS_AIX_ENV)
	struct file *fd;

	/* cf. console_printf() in oncplus/kernext/nfs/serv/shared.c */
	if (fp_open("/dev/console",O_WRONLY|O_NOCTTY|O_NDELAY,
		    0666,0,FP_SYS,&fd) == 0) {
	    char buf[1024];
	    ssize_t len;
	    ssize_t count;

	    sprintf(buf, a,b,c,d,e,f,g,h,i,j);
	    len = strlen(buf);
	    fp_write(fd, buf, len, 0, UIO_SYSSPACE, &count);
	    fp_close(fd);
	}
#else
	printf(a,b,c,d,e,f,g,h,i,j);
#endif
    }
}

afs_warnuser(a,b,c,d,e,f,g,h,i,j)
char *a;
long b,c,d,e,f,g,h,i,j;
{
    AFS_STATCNT(afs_warnuser);
    if (afs_showflags & GAGUSER)
    {
#ifdef AFS_GLOBAL_SUNLOCK
	int haveGlock = ISAFS_GLOCK();
	if (haveGlock)
	    AFS_GUNLOCK();
#endif /* AFS_GLOBAL_SUNLOCK */

	uprintf(a,b,c,d,e,f,g,h,i,j);

#ifdef AFS_GLOBAL_SUNLOCK
	if (haveGlock)
	    AFS_GLOCK();
#endif /* AFS_GLOBAL_SUNLOCK */
    }
}


/* run everywhere, checking locks */
void afs_CheckLocks()

{
    extern afs_rwlock_t afs_xconn, afs_xvolume, afs_xuser, afs_xcell;
    extern afs_rwlock_t afs_xserver;
    extern struct server *afs_servers[NSERVERS];
    extern struct unixuser *afs_users[NUSERS];
    extern unsigned char *afs_indexFlags;
    register int i;

    afs_warn("Looking for locked data structures.\n");
    afs_warn("conn %x, volume %x, user %x, cell %x, server %x\n",
	    afs_xconn, afs_xvolume, afs_xuser, afs_xcell, afs_xserver);
    {
	register struct vcache *tvc;
	AFS_STATCNT(afs_CheckLocks);

	for(i=0;i<VCSIZE;i++) {
	    for(tvc = afs_vhashT[i]; tvc; tvc=tvc->hnext) {
#ifdef	AFS_OSF_ENV
		if (VREFCOUNT(tvc) > 1)
#else	/* AFS_OSF_ENV */
		if (VREFCOUNT(tvc))
#endif
		    afs_warn("Stat cache entry at %x is held\n", tvc);
		if (CheckLock(&tvc->lock))
 		    afs_warn("Stat entry at %x is locked\n", tvc);
	    }
	}
    }
    {
	register struct dcache *tdc;
	for (i=0;i<afs_cacheFiles;i++) {
	    tdc = afs_indexTable[i];
	    if (tdc) {
		if (tdc->refCount)
		    afs_warn("Disk entry %d at %x is held\n", i, tdc);
	    }
	    if (afs_indexFlags[i] & IFDataMod)
		afs_warn("Disk entry %d at %x has IFDataMod flag set.\n", i, tdc);
	}
    }
    {
       struct srvAddr *sa;
       struct server *ts;
       struct conn *tc;
	for (i=0;i<NSERVERS;i++) {
	    for (ts = afs_servers[i]; ts; ts=ts->next) {
		if (ts->flags & SRVR_ISDOWN)
		    printf("Server entry %x is marked down\n", ts);
		for (sa = ts->addr; sa; sa = sa->next_sa) {	
		    for (tc = sa->conns; tc; tc=tc->next) {
		       if (tc->refCount)
			  afs_warn("conn at %x (server %x) is held\n", tc, sa->sa_ip);
		    }
		}
	    }
	}
    }
    {
       struct volume *tv;
	for (i=0;i<NVOLS;i++) {
	    for (tv = afs_volumes[i]; tv; tv=tv->next) {
		if (CheckLock(&tv->lock))
		    afs_warn("volume at %x is locked\n", tv);
		if (tv->refCount)
		    afs_warn("volume at %x is held\n", tv);
	    }
	}
    }
    {
       struct unixuser *tu;

	for (i=0;i<NUSERS;i++) {
	    for (tu = afs_users[i]; tu; tu=tu->next) {
		if (tu->refCount) printf("user at %x is held\n", tu);
	    }
	}
    }
    afs_warn("Done.\n");
}


int afs_noop() {
    AFS_STATCNT(afs_noop);
#ifdef	AFS_OSF30_ENV
    return (EOPNOTSUPP);
#else
    return EINVAL;
#endif
}

int afs_badop() {
    AFS_STATCNT(afs_badop);
    osi_Panic("afs bad vnode op");
    return 0;			/* make SGI C compiler happy */
}

/*
 * afs_data_pointer_to_int32() - returns least significant afs_int32 of the
 * given data pointer, without triggering "cast truncates pointer"
 * warnings.  We use this where we explicitly don't care whether a
 * pointer is truncated -- it loses information where a pointer is
 * larger than an afs_int32.
 */

afs_int32
afs_data_pointer_to_int32(const void *p)
{
	union {
		afs_int32  i32[sizeof(void *)/sizeof(afs_int32)];
		const void *p;
	} ip;

	int i32_sub;	/* subscript of least significant afs_int32 in ip.i32[] */

	/* set i32_sub */

	{
		/* used to determine the byte order of the system */

		union {
			char c[sizeof(int)/sizeof(char)];
			int  i;
		} ci;

		ci.i = 1;
		if (ci.c[0] == 1) {
			/* little-endian system */
			i32_sub = 0;
		} else {
			/* big-endian system */
			i32_sub = (sizeof ip.i32 / sizeof ip.i32[0]) - 1;
		}
	}

	ip.p = p;
	return ip.i32[i32_sub];
}
