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quota.c

/*
 * $Id: quota.c,v 1.22.8.11 2004/06/28 22:46:28 didg Exp $
 *
 * Copyright (c) 1990,1993 Regents of The University of Michigan.
 * All Rights Reserved.  See COPYRIGHT.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */

#ifndef NO_QUOTA_SUPPORT
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
/* STDC check */
#if STDC_HEADERS
#include <string.h>
#else /* STDC_HEADERS */
#ifndef HAVE_STRCHR
#define strchr index
#define strrchr index
#endif /* HAVE_STRCHR */
char *strchr (), *strrchr ();
#ifndef HAVE_MEMCPY
#define memcpy(d,s,n) bcopy ((s), (d), (n))
#define memmove(d,s,n) bcopy ((s), (d), (n))
#endif /* ! HAVE_MEMCPY */
#endif /* STDC_HEADERS */
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/param.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif /* HAVE_FCNTL_H */

#include <atalk/logger.h>
#include <atalk/afp.h>

#include "auth.h"
#include "volume.h"
#include "unix.h"

#define DEBUG_QUOTA 0
#define WANT_USER_QUOTA 0
#define WANT_GROUP_QUOTA 1

#ifdef NEED_QUOTACTL_WRAPPER
int quotactl(int cmd, const char *special, int id, caddr_t addr)
{
    return syscall(__NR_quotactl, cmd, special, id, addr);
}
#endif /* NEED_QUOTACTL_WRAPPER */

static int overquota( struct dqblk *);

#ifdef linux

#ifdef HAVE_LINUX_XQM_H
#include <linux/xqm.h>
#else
#ifdef HAVE_XFS_XQM_H
#include <xfs/xqm.h>
#define HAVE_LINUX_XQM_H
#endif /* HAVE_XFS_XQM_H */
#endif /* HAVE_LINUX_XQM_H */

#include <linux/unistd.h>

static int is_xfs = 0;

static int get_linux_xfs_quota(int, char*, uid_t, struct dqblk *);
static int get_linux_fs_quota(int, char*, uid_t, struct dqblk *);

/* format supported by current kernel */
static int kernel_iface = IFACE_UNSET;

/*
**  Check kernel quota version
**  Taken from quota-tools 3.08 by Jan Kara <jack@suse.cz>
*/
static void linuxquota_get_api( void )
{
#ifndef LINUX_API_VERSION
    struct stat st;

    if (stat("/proc/sys/fs/quota", &st) == 0) {
        kernel_iface = IFACE_GENERIC;
    }
    else {
        struct dqstats_v2 v2_stats;
        struct sigaction  sig;
        struct sigaction  oldsig;

        /* This signal handling is needed because old kernels send us SIGSEGV as they try to resolve the device */
        sig.sa_handler   = SIG_IGN;
        sig.sa_sigaction = NULL;
        sig.sa_flags     = 0;
        sigemptyset(&sig.sa_mask);
        if (sigaction(SIGSEGV, &sig, &oldsig) < 0) {
          LOG( log_error, logtype_afpd, "cannot set SEGV signal handler: %s", strerror(errno));
            goto failure;
        }
        if (quotactl(QCMD(Q_V2_GETSTATS, 0), NULL, 0, (void *)&v2_stats) >= 0) {
            kernel_iface = IFACE_VFSV0;
        }
        else if (errno != ENOSYS && errno != ENOTSUP) {
            /* RedHat 7.1 (2.4.2-2) newquota check 
             * Q_V2_GETSTATS in it's old place, Q_GETQUOTA in the new place
             * (they haven't moved Q_GETSTATS to its new value) */
            int err_stat = 0;
            int err_quota = 0;
            char tmp[1024];         /* Just temporary buffer */

            if (quotactl(QCMD(Q_V1_GETSTATS, 0), NULL, 0, tmp))
                err_stat = errno;
            if (quotactl(QCMD(Q_V1_GETQUOTA, 0), "/dev/null", 0, tmp))
                err_quota = errno;

            /* On a RedHat 2.4.2-2  we expect 0, EINVAL
             * On a 2.4.x           we expect 0, ENOENT
             * On a 2.4.x-ac  we wont get here */
            if (err_stat == 0 && err_quota == EINVAL) {
                kernel_iface = IFACE_VFSV0;
            }
            else {
                kernel_iface = IFACE_VFSOLD;
            }
        }
        else {
            /* This branch is *not* in quota-tools 3.08
            ** but without it quota version is not correctly
            ** identified for the original SuSE 8.0 kernel */
            unsigned int vers_no;
            FILE * qf;

            if ((qf = fopen("/proc/fs/quota", "r"))) {
                if (fscanf(qf, "Version %u", &vers_no) == 1) {
                    if ( (vers_no == (6*10000 + 5*100 + 0)) ||
                         (vers_no == (6*10000 + 5*100 + 1)) ) {
                        kernel_iface = IFACE_VFSV0;
                    }
                }
                fclose(qf);
            }
        }
        if (sigaction(SIGSEGV, &oldsig, NULL) < 0) {
          LOG(log_error, logtype_afpd, "cannot reset signal handler: %s", strerror(errno));
            goto failure;
        }
    }

failure:
    if (kernel_iface == IFACE_UNSET)
       kernel_iface = IFACE_VFSOLD;

#else /* defined LINUX_API_VERSION */
    kernel_iface = LINUX_API_VERSION;
#endif
}

/****************************************************************************/

static int get_linux_quota(int what, char *path, uid_t euser_id, struct dqblk *dp)
{
      int r; /* result */

      if ( is_xfs )
            r=get_linux_xfs_quota(what, path, euser_id, dp);
      else
            r=get_linux_fs_quota(what, path, euser_id, dp);
    
      return r;
}

/****************************************************************************
 Abstract out the XFS Quota Manager quota get call.
****************************************************************************/

static int get_linux_xfs_quota(what, path, euser_id, dqb)
int what;
char *path;
uid_t euser_id;
struct dqblk *dqb;
{
      int ret = -1;
#ifdef HAVE_LINUX_XQM_H
      struct fs_disk_quota D;
      
      memset (&D, 0, sizeof(D));

      if ((ret = quotactl(QCMD(Q_XGETQUOTA,(what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t)&D)))
               return ret;

      dqb->bsize = (u_int64_t)512;
        dqb->dqb_bsoftlimit  = (u_int64_t)D.d_blk_softlimit;
        dqb->dqb_bhardlimit  = (u_int64_t)D.d_blk_hardlimit;
        dqb->dqb_ihardlimit  = (u_int64_t)D.d_ino_hardlimit;
        dqb->dqb_isoftlimit  = (u_int64_t)D.d_ino_softlimit;
        dqb->dqb_curinodes   = (u_int64_t)D.d_icount;
        dqb->dqb_curblocks   = (u_int64_t)D.d_bcount; 
#endif
       return ret;
}

/*
** Wrapper for the quotactl(GETQUOTA) call.
** For API v2 the results are copied back into a v1 structure.
** Taken from quota-1.4.8 perl module
*/
static int get_linux_fs_quota( what, path, euser_id, dqb)
int what;
char *path;
uid_t euser_id;
struct dqblk *dqb;
{
      int ret;

      if (kernel_iface == IFACE_UNSET)
            linuxquota_get_api();

      if (kernel_iface == IFACE_GENERIC)
      {
            struct dqblk_v3 dqb3;

            ret = quotactl(QCMD(Q_V3_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb3);
            if (ret == 0)
            {
                        dqb->dqb_bhardlimit = dqb3.dqb_bhardlimit;
                        dqb->dqb_bsoftlimit = dqb3.dqb_bsoftlimit;
                        dqb->dqb_curblocks  = dqb3.dqb_curspace / DEV_QBSIZE;
                        dqb->dqb_ihardlimit = dqb3.dqb_ihardlimit;
                        dqb->dqb_isoftlimit = dqb3.dqb_isoftlimit;
                        dqb->dqb_curinodes  = dqb3.dqb_curinodes;
                        dqb->dqb_btime      = dqb3.dqb_btime;
                        dqb->dqb_itime      = dqb3.dqb_itime;
                  dqb->bsize      = DEV_QBSIZE;
            }
      }
      else if (kernel_iface == IFACE_VFSV0)
      {
            struct dqblk_v2 dqb2;

            ret = quotactl(QCMD(Q_V2_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb2);
            if (ret == 0)
            {
                        dqb->dqb_bhardlimit = dqb2.dqb_bhardlimit;
                        dqb->dqb_bsoftlimit = dqb2.dqb_bsoftlimit;
                        dqb->dqb_curblocks  = dqb2.dqb_curspace / DEV_QBSIZE;
                        dqb->dqb_ihardlimit = dqb2.dqb_ihardlimit;
                        dqb->dqb_isoftlimit = dqb2.dqb_isoftlimit;
                        dqb->dqb_curinodes  = dqb2.dqb_curinodes;
                        dqb->dqb_btime      = dqb2.dqb_btime;
                        dqb->dqb_itime      = dqb2.dqb_itime;
                  dqb->bsize      = DEV_QBSIZE;
            }
      }
      else /* if (kernel_iface == IFACE_VFSOLD) */
      {
            struct dqblk_v1 dqb1;

            ret = quotactl(QCMD(Q_V1_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb1);
            if (ret == 0)
            {
                        dqb->dqb_bhardlimit = dqb1.dqb_bhardlimit;
                        dqb->dqb_bsoftlimit = dqb1.dqb_bsoftlimit;
                        dqb->dqb_curblocks  = dqb1.dqb_curblocks;
                        dqb->dqb_ihardlimit = dqb1.dqb_ihardlimit;
                        dqb->dqb_isoftlimit = dqb1.dqb_isoftlimit;
                        dqb->dqb_curinodes  = dqb1.dqb_curinodes;
                        dqb->dqb_btime      = dqb1.dqb_btime;
                        dqb->dqb_itime      = dqb1.dqb_itime;
                  dqb->bsize      = DEV_QBSIZE;
            }
      }
      return ret;
}

#endif /* linux */

#if defined(HAVE_SYS_MNTTAB_H) || defined(__svr4__)
/*
 * Return the mount point associated with the filesystem
 * on which "file" resides.  Returns NULL on failure.
 */
static char *
mountp( file, nfs)
char  *file;
int         *nfs;
{
    struct stat               sb;
    FILE                *mtab;
    dev_t               devno;
    static struct mnttab      mnt;

    if ( stat( file, &sb ) < 0 ) {
        return( NULL );
    }
    devno = sb.st_dev;

    if (( mtab = fopen( "/etc/mnttab", "r" )) == NULL ) {
        return( NULL );
    }

    while ( getmntent( mtab, &mnt ) == 0 ) {
        /* local fs */
        if ( (stat( mnt.mnt_special, &sb ) == 0) && (devno == sb.st_rdev)) {
            fclose( mtab );
            return mnt.mnt_mountp;
        }

        /* check for nfs. we probably should use
         * strcmp(mnt.mnt_fstype, MNTTYPE_NFS), but that's not as fast. */
        if ((stat(mnt.mnt_mountp, &sb) == 0) && (devno == sb.st_dev) &&
                strchr(mnt.mnt_special, ':')) {
            *nfs = 1;
            fclose( mtab );
            return mnt.mnt_special;
        }
    }

    fclose( mtab );
    return( NULL );
}

#else /* __svr4__ */
#ifdef ultrix
/*
* Return the block-special device name associated with the filesystem
* on which "file" resides.  Returns NULL on failure.
*/

static char *
special( file, nfs )
char *file;
int  *nfs;
{
    static struct fs_data     fsd;

    if ( getmnt(0, &fsd, 0, STAT_ONE, file ) < 0 ) {
        LOG(log_info, logtype_afpd, "special: getmnt %s: %s", file, strerror(errno) );
        return( NULL );
    }

    /* XXX: does this really detect an nfs mounted fs? */
    if (strchr(fsd.fd_req.devname, ':'))
        *nfs = 1;
    return( fsd.fd_req.devname );
}

#else /* ultrix */
#if (defined(HAVE_SYS_MOUNT_H) && !defined(__linux__)) || defined(BSD4_4) || defined(_IBMR2)

static char *
special( file, nfs )
char  *file;
int         *nfs;
{
    static struct statfs      sfs;

    if ( statfs( file, &sfs ) < 0 ) {
        return( NULL );
    }

#ifdef TRU64
    /* Digital UNIX: The struct sfs contains a field sfs.f_type,
     * the MOUNT_* constants are defined in <sys/mount.h> */
    if ((sfs.f_type == MOUNT_NFS)||(sfs.f_type == MOUNT_NFS3))
#else /* TRU64 */
    /* XXX: make sure this really detects an nfs mounted fs */
    if (strchr(sfs.f_mntfromname, ':'))
#endif /* TRU64 */
        *nfs = 1;
    return( sfs.f_mntfromname );
}

#else /* BSD4_4 */

static char *
special( file, nfs )
char *file;
int *nfs;
{
    struct stat         sb;
    FILE          *mtab;
    dev_t         devno;
    struct mntent *mnt;
    int           found=0;

    if ( stat( file, &sb ) < 0 ) {
        return( NULL );
    }
    devno = sb.st_dev;

    if (( mtab = setmntent( "/etc/mtab", "r" )) == NULL ) {
        return( NULL );
    }

    while (( mnt = getmntent( mtab )) != NULL ) {
        /* check for local fs */
        if ( (stat( mnt->mnt_fsname, &sb ) == 0) && devno == sb.st_rdev) {
          found = 1;
          break;
        }

        /* check for an nfs mount entry. the alternative is to use
        * strcmp(mnt->mnt_type, MNTTYPE_NFS) instead of the strchr. */
        if ((stat(mnt->mnt_dir, &sb) == 0) && (devno == sb.st_dev) &&
                strchr(mnt->mnt_fsname, ':')) {
            *nfs = 1;
          found = 1;
          break;
        }
    }

    endmntent( mtab );

    if (!found)
      return (NULL);
#ifdef linux
    if (strcmp(mnt->mnt_type, "xfs") == 0)
      is_xfs = 1;
#endif
      
    return( mnt->mnt_fsname );
}

#endif /* BSD4_4 */
#endif /* ultrix */
#endif /* __svr4__ */


static int getfsquota(vol, uid, dq)
struct vol        *vol;
const int         uid;
struct dqblk            *dq;

{
      struct dqblk dqg;

#ifdef __svr4__
    struct quotctl      qc;
#endif

    memset(&dqg, 0, sizeof(dqg));
      
#ifdef __svr4__
    qc.op = Q_GETQUOTA;
    qc.uid = uid;
    qc.addr = (caddr_t)dq;
    if ( ioctl( vol->v_qfd, Q_QUOTACTL, &qc ) < 0 ) {
        return( AFPERR_PARAM );
    }

#else /* __svr4__ */
#ifdef ultrix
    if ( quota( Q_GETDLIM, uid, vol->v_gvs, dq ) != 0 ) {
        return( AFPERR_PARAM );
    }
#else /* ultrix */

#ifndef USRQUOTA
#define USRQUOTA   0
#endif

#ifndef QCMD
#define QCMD(a,b)  (a)
#endif

#ifndef TRU64
    /* for group quotas. we only use these if the user belongs
    * to one group. */
#endif /* TRU64 */

#ifdef BSD4_4
    if ( seteuid( getuid() ) == 0 ) {
        if ( quotactl( vol->v_path, QCMD(Q_GETQUOTA,USRQUOTA),
                       uid, (char *)dq ) != 0 ) {
            /* try group quotas */
            if (ngroups >= 1) {
                if ( quotactl(vol->v_path, QCMD(Q_GETQUOTA, GRPQUOTA),
                              groups[0], (char *) &dqg) != 0 ) {
                    seteuid( uid );
                    return( AFPERR_PARAM );
                }
            }
        }
        seteuid( uid );
    }

#elif defined(TRU64)
    if ( seteuid( getuid() ) == 0 ) {
        if ( quotactl( vol->v_path, QCMD(Q_GETQUOTA, USRQUOTA),
                       uid, (char *)dq ) != 0 ) {
            seteuid( uid );
            return ( AFPERR_PARAM );
        }
        seteuid( uid );
    }

#else /* BSD4_4 */
    if (get_linux_quota (WANT_USER_QUOTA, vol->v_gvs, uid, dq) !=0) {
        return( AFPERR_PARAM );
    }

    if (get_linux_quota(WANT_GROUP_QUOTA, vol->v_gvs, getegid(),  &dqg) != 0) {
#ifdef DEBUG_QUOTA
        LOG(log_debug, logtype_afpd, "group quota did not work!" );
#endif /* DEBUG_QUOTA */

      return AFP_OK; /* no need to check user vs group quota */
    }
#endif  /* BSD4_4 */


#ifndef TRU64
    /* return either the group quota entry or user quota entry,
       whichever has the least amount of space remaining
    */

    /* if user space remaining > group space remaining */
    if( 
        /* if overquota, free space is 0 otherwise hard-current */
        ( overquota( dq ) ? 0 : ( dq->dqb_bhardlimit ? dq->dqb_bhardlimit - 
                                  dq->dqb_curblocks : ~((u_int64_t) 0) ) )

      >
        
        ( overquota( &dqg ) ? 0 : ( dqg.dqb_bhardlimit ? dqg.dqb_bhardlimit - 
                                    dqg.dqb_curblocks : ~((u_int64_t) 0) ) )

      ) /* if */
    {
        /* use group quota limits rather than user limits */
        dq->dqb_curblocks = dqg.dqb_curblocks;
        dq->dqb_bhardlimit = dqg.dqb_bhardlimit;
        dq->dqb_bsoftlimit = dqg.dqb_bsoftlimit;
        dq->dqb_btimelimit = dqg.dqb_btimelimit;
    } /* if */

#endif /* TRU64 */

#endif /* ultrix */
#endif /* __svr4__ */

    return AFP_OK;
}


static int getquota( vol, dq, bsize)
struct vol        *vol;
struct dqblk            *dq;
const u_int32_t         bsize;
{
    char *p;

#ifdef __svr4__
    char          buf[ MAXPATHLEN + 1];

    if ( vol->v_qfd == -1 && vol->v_gvs == NULL) {
        if (( p = mountp( vol->v_path, &vol->v_nfs)) == NULL ) {
            LOG(log_info, logtype_afpd, "getquota: mountp %s fails", vol->v_path );
            return( AFPERR_PARAM );
        }

        if (vol->v_nfs) {
            if (( vol->v_gvs = (char *)malloc( strlen( p ) + 1 )) == NULL ) {
                LOG(log_error, logtype_afpd, "getquota: malloc: %s", strerror(errno) );
                return AFPERR_MISC;
            }
            strcpy( vol->v_gvs, p );

        } else {
            sprintf( buf, "%s/quotas", p );
            if (( vol->v_qfd = open( buf, O_RDONLY, 0 )) < 0 ) {
                LOG(log_info, logtype_afpd, "open %s: %s", buf, strerror(errno) );
                return( AFPERR_PARAM );
            }
        }

    }
#else
    if ( vol->v_gvs == NULL ) {
        if (( p = special( vol->v_path, &vol->v_nfs )) == NULL ) {
            LOG(log_info, logtype_afpd, "getquota: special %s fails", vol->v_path );
            return( AFPERR_PARAM );
        }

        if (( vol->v_gvs = (char *)malloc( strlen( p ) + 1 )) == NULL ) {
            LOG(log_error, logtype_afpd, "getquota: malloc: %s", strerror(errno) );
            return AFPERR_MISC;
        }
        strcpy( vol->v_gvs, p );
    }
#endif

#ifdef TRU64
    /* Digital UNIX: Two forms of specifying an NFS filesystem are possible,
       either 'hostname:path' or 'path@hostname' (Ultrix heritage) */
    if (vol->v_nfs) {
      char *hostpath;
      char pathstring[MNAMELEN];
      /* MNAMELEN ist defined in <sys/mount.h> */
      int result;
      
      if ((hostpath = strchr(vol->v_gvs,'@')) != NULL ) {
          /* convert 'path@hostname' to 'hostname:path',
           * call getnfsquota(),
           * convert 'hostname:path' back to 'path@hostname' */
          *hostpath = '\0';
          sprintf(pathstring,"%s:%s",hostpath+1,vol->v_gvs);
          strcpy(vol->v_gvs,pathstring);
          
          result = getnfsquota(vol, uuid, bsize, dq);
          
          hostpath = strchr(vol->v_gvs,':');
          *hostpath = '\0';
          sprintf(pathstring,"%s@%s",hostpath+1,vol->v_gvs);
          strcpy(vol->v_gvs,pathstring);
          
          return result;
      }
      else
          /* vol->v_gvs is of the form 'hostname:path' */
          return getnfsquota(vol, uuid, bsize, dq);
    } else
      /* local filesystem */
      return getfsquota(vol, uuid, dq);
         
#else /* TRU64 */
    return vol->v_nfs ? getnfsquota(vol, uuid, bsize, dq) :
           getfsquota(vol, uuid, dq);
#endif /* TRU64 */
}

static int overquota( dqblk )
struct dqblk        *dqblk;
{
    struct timeval      tv;

    if ( dqblk->dqb_curblocks > dqblk->dqb_bhardlimit &&
         dqblk->dqb_bhardlimit != 0 ) {
        return( 1 );
    }

    if ( dqblk->dqb_curblocks < dqblk->dqb_bsoftlimit ||
         dqblk->dqb_bsoftlimit == 0 ) {
        return( 0 );
    }
#ifdef ultrix
    if ( dqblk->dqb_bwarn ) {
        return( 0 );
    }
#else /* ultrix */
    if ( gettimeofday( &tv, 0 ) < 0 ) {
        LOG(log_error, logtype_afpd, "overquota: gettimeofday: %s", strerror(errno) );
        return( AFPERR_PARAM );
    }
    if ( dqblk->dqb_btimelimit && dqblk->dqb_btimelimit > tv.tv_sec ) {
        return( 0 );
    }
#endif /* ultrix */
    return( 1 );
}

/*
 * This next bit is basically for linux -- everything is fine
 * if you use 1k blocks... but if you try (for example) to mount
 * a volume via nfs from a netapp (which might use 4k blocks) everything
 * gets reported improperly.  I have no idea about dbtob on other
 * platforms.
 */

#ifdef HAVE_BROKEN_DBTOB
#undef dbtob
#define dbtob(a, b)     ((VolSpace)((VolSpace)(a) * (VolSpace)(b)))
#define HAVE_2ARG_DBTOB
#endif

#ifndef dbtob
#define dbtob(a)       ((a) << 10)
#endif

/* i do the cast to VolSpace here to make sure that 64-bit shifts
   work */
#ifdef HAVE_2ARG_DBTOB
#define tobytes(a, b)  dbtob((VolSpace) (a), (VolSpace) (b))
#else 
#define tobytes(a, b)  dbtob((VolSpace) (a))
#endif

int uquota_getvolspace( vol, bfree, btotal, bsize)
const struct vol  *vol;
VolSpace    *bfree, *btotal;
const u_int32_t bsize;
{
      u_int64_t this_bsize;
      struct dqblk dqblk;

      this_bsize = bsize;
                  
      if (getquota( vol, &dqblk, bsize) != 0 ) {
            return( AFPERR_PARAM );
      }

#ifdef linux
      this_bsize = dqblk.bsize;
#endif

#if DEBUG_QUOTA
        LOG(log_info, logtype_afpd, "after calling getquota in uquota_getvolspace!" );
        LOG(log_info, logtype_afpd, "dqb_ihardlimit: %u", dqblk.dqb_ihardlimit );
        LOG(log_info, logtype_afpd, "dqb_isoftlimit: %u", dqblk.dqb_isoftlimit );
        LOG(log_info, logtype_afpd, "dqb_curinodes : %u", dqblk.dqb_curinodes );
        LOG(log_info, logtype_afpd, "dqb_bhardlimit: %u", dqblk.dqb_bhardlimit );
        LOG(log_info, logtype_afpd, "dqb_bsoftlimit: %u", dqblk.dqb_bsoftlimit );
        LOG(log_info, logtype_afpd, "dqb_curblocks : %u", dqblk.dqb_curblocks );
        LOG(log_info, logtype_afpd, "dqb_btime     : %u", dqblk.dqb_btime );
        LOG(log_info, logtype_afpd, "dqb_itime     : %u", dqblk.dqb_itime );
        LOG(log_info, logtype_afpd, "bsize/this_bsize : %u/%u", bsize, this_bsize );
      LOG(log_info, logtype_afpd, "dqblk.dqb_bhardlimit size: %u", tobytes( dqblk.dqb_bhardlimit, this_bsize ));
      LOG(log_info, logtype_afpd, "dqblk.dqb_bsoftlimit size: %u", tobytes( dqblk.dqb_bsoftlimit, this_bsize ));
      LOG(log_info, logtype_afpd, "dqblk.dqb_curblocks  size: %u", tobytes( dqblk.dqb_curblocks, this_bsize ));
#endif /* DEBUG_QUOTA */ 

      /* no limit set for this user. it might be set in the future. */
      if (dqblk.dqb_bsoftlimit == 0 && dqblk.dqb_bhardlimit == 0) {
            *btotal = *bfree = ~((VolSpace) 0);
      } else if ( overquota( &dqblk )) {
            if ( tobytes( dqblk.dqb_curblocks, this_bsize ) > tobytes( dqblk.dqb_bsoftlimit, this_bsize ) ) {
                        *btotal = tobytes( dqblk.dqb_curblocks, this_bsize );
                        *bfree = 0;
            }
            else {
                        *btotal = tobytes( dqblk.dqb_bsoftlimit, this_bsize );
                        *bfree  = tobytes( dqblk.dqb_bsoftlimit, this_bsize ) -
                                tobytes( dqblk.dqb_curblocks, this_bsize );
            }
      } else {
            *btotal = tobytes( dqblk.dqb_bhardlimit, this_bsize );
            *bfree  = tobytes( dqblk.dqb_bhardlimit, this_bsize  ) -
                    tobytes( dqblk.dqb_curblocks, this_bsize );
      }

#if DEBUG_QUOTA
        LOG(log_info, logtype_afpd, "bfree          : %u", *bfree );
        LOG(log_info, logtype_afpd, "btotal         : %u", *btotal );
        LOG(log_info, logtype_afpd, "bfree          : %uKB", *bfree/1024 );
        LOG(log_info, logtype_afpd, "btotal         : %uKB", *btotal/1024 );
#endif

      return( AFP_OK );
}
#endif

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