2 * $Id: quota.c,v 1.27 2006-09-15 00:07:43 didg Exp $
4 * Copyright (c) 1990,1993 Regents of The University of Michigan.
5 * All Rights Reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
12 #ifndef NO_QUOTA_SUPPORT
17 #include <sys/types.h>
21 #else /* STDC_HEADERS */
25 #endif /* HAVE_STRCHR */
26 char *strchr (), *strrchr ();
28 #define memcpy(d,s,n) bcopy ((s), (d), (n))
29 #define memmove(d,s,n) bcopy ((s), (d), (n))
30 #endif /* ! HAVE_MEMCPY */
31 #endif /* STDC_HEADERS */
34 #include <sys/param.h>
37 #endif /* HAVE_UNISTD_H */
40 #endif /* HAVE_FCNTL_H */
42 #include <atalk/logger.h>
43 #include <atalk/afp.h>
50 #define WANT_USER_QUOTA 0
51 #define WANT_GROUP_QUOTA 1
53 #ifdef NEED_QUOTACTL_WRAPPER
54 int quotactl(int cmd, const char *special, int id, caddr_t addr)
56 return syscall(__NR_quotactl, cmd, special, id, addr);
58 #endif /* NEED_QUOTACTL_WRAPPER */
60 static int overquota( struct dqblk *);
64 #ifdef HAVE_LINUX_XQM_H
65 #include <linux/xqm.h>
69 #define HAVE_LINUX_XQM_H
71 #ifdef HAVE_LINUX_DQBLK_XFS_H
72 #include <linux/dqblk_xfs.h>
73 #define HAVE_LINUX_XQM_H
74 #endif /* HAVE_LINUX_DQBLK_XFS_H */
75 #endif /* HAVE_XFS_XQM_H */
76 #endif /* HAVE_LINUX_XQM_H */
78 #include <linux/unistd.h>
80 static int is_xfs = 0;
82 static int get_linux_xfs_quota(int, char*, uid_t, struct dqblk *);
83 static int get_linux_fs_quota(int, char*, uid_t, struct dqblk *);
85 /* format supported by current kernel */
86 static int kernel_iface = IFACE_UNSET;
89 ** Check kernel quota version
90 ** Taken from quota-tools 3.08 by Jan Kara <jack@suse.cz>
92 static void linuxquota_get_api( void )
94 #ifndef LINUX_API_VERSION
97 if (stat("/proc/sys/fs/quota", &st) == 0) {
98 kernel_iface = IFACE_GENERIC;
101 struct dqstats_v2 v2_stats;
102 struct sigaction sig;
103 struct sigaction oldsig;
105 /* This signal handling is needed because old kernels send us SIGSEGV as they try to resolve the device */
106 sig.sa_handler = SIG_IGN;
107 sig.sa_sigaction = NULL;
109 sigemptyset(&sig.sa_mask);
110 if (sigaction(SIGSEGV, &sig, &oldsig) < 0) {
111 LOG( log_error, logtype_afpd, "cannot set SEGV signal handler: %s", strerror(errno));
114 if (quotactl(QCMD(Q_V2_GETSTATS, 0), NULL, 0, (void *)&v2_stats) >= 0) {
115 kernel_iface = IFACE_VFSV0;
117 else if (errno != ENOSYS && errno != ENOTSUP) {
118 /* RedHat 7.1 (2.4.2-2) newquota check
119 * Q_V2_GETSTATS in it's old place, Q_GETQUOTA in the new place
120 * (they haven't moved Q_GETSTATS to its new value) */
123 char tmp[1024]; /* Just temporary buffer */
125 if (quotactl(QCMD(Q_V1_GETSTATS, 0), NULL, 0, tmp))
127 if (quotactl(QCMD(Q_V1_GETQUOTA, 0), "/dev/null", 0, tmp))
130 /* On a RedHat 2.4.2-2 we expect 0, EINVAL
131 * On a 2.4.x we expect 0, ENOENT
132 * On a 2.4.x-ac we wont get here */
133 if (err_stat == 0 && err_quota == EINVAL) {
134 kernel_iface = IFACE_VFSV0;
137 kernel_iface = IFACE_VFSOLD;
141 /* This branch is *not* in quota-tools 3.08
142 ** but without it quota version is not correctly
143 ** identified for the original SuSE 8.0 kernel */
144 unsigned int vers_no;
147 if ((qf = fopen("/proc/fs/quota", "r"))) {
148 if (fscanf(qf, "Version %u", &vers_no) == 1) {
149 if ( (vers_no == (6*10000 + 5*100 + 0)) ||
150 (vers_no == (6*10000 + 5*100 + 1)) ) {
151 kernel_iface = IFACE_VFSV0;
157 if (sigaction(SIGSEGV, &oldsig, NULL) < 0) {
158 LOG(log_error, logtype_afpd, "cannot reset signal handler: %s", strerror(errno));
164 if (kernel_iface == IFACE_UNSET)
165 kernel_iface = IFACE_VFSOLD;
167 #else /* defined LINUX_API_VERSION */
168 kernel_iface = LINUX_API_VERSION;
172 /****************************************************************************/
174 static int get_linux_quota(int what, char *path, uid_t euser_id, struct dqblk *dp)
179 r=get_linux_xfs_quota(what, path, euser_id, dp);
181 r=get_linux_fs_quota(what, path, euser_id, dp);
186 /****************************************************************************
187 Abstract out the XFS Quota Manager quota get call.
188 ****************************************************************************/
190 static int get_linux_xfs_quota(what, path, euser_id, dqb)
197 #ifdef HAVE_LINUX_XQM_H
198 struct fs_disk_quota D;
200 memset (&D, 0, sizeof(D));
202 if ((ret = quotactl(QCMD(Q_XGETQUOTA,(what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t)&D)))
205 dqb->bsize = (u_int64_t)512;
206 dqb->dqb_bsoftlimit = (u_int64_t)D.d_blk_softlimit;
207 dqb->dqb_bhardlimit = (u_int64_t)D.d_blk_hardlimit;
208 dqb->dqb_ihardlimit = (u_int64_t)D.d_ino_hardlimit;
209 dqb->dqb_isoftlimit = (u_int64_t)D.d_ino_softlimit;
210 dqb->dqb_curinodes = (u_int64_t)D.d_icount;
211 dqb->dqb_curblocks = (u_int64_t)D.d_bcount;
217 ** Wrapper for the quotactl(GETQUOTA) call.
218 ** For API v2 the results are copied back into a v1 structure.
219 ** Taken from quota-1.4.8 perl module
221 static int get_linux_fs_quota( what, path, euser_id, dqb)
229 if (kernel_iface == IFACE_UNSET)
230 linuxquota_get_api();
232 if (kernel_iface == IFACE_GENERIC)
234 struct dqblk_v3 dqb3;
236 ret = quotactl(QCMD(Q_V3_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb3);
239 dqb->dqb_bhardlimit = dqb3.dqb_bhardlimit;
240 dqb->dqb_bsoftlimit = dqb3.dqb_bsoftlimit;
241 dqb->dqb_curblocks = dqb3.dqb_curspace / DEV_QBSIZE;
242 dqb->dqb_ihardlimit = dqb3.dqb_ihardlimit;
243 dqb->dqb_isoftlimit = dqb3.dqb_isoftlimit;
244 dqb->dqb_curinodes = dqb3.dqb_curinodes;
245 dqb->dqb_btime = dqb3.dqb_btime;
246 dqb->dqb_itime = dqb3.dqb_itime;
247 dqb->bsize = DEV_QBSIZE;
250 else if (kernel_iface == IFACE_VFSV0)
252 struct dqblk_v2 dqb2;
254 ret = quotactl(QCMD(Q_V2_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb2);
257 dqb->dqb_bhardlimit = dqb2.dqb_bhardlimit;
258 dqb->dqb_bsoftlimit = dqb2.dqb_bsoftlimit;
259 dqb->dqb_curblocks = dqb2.dqb_curspace / DEV_QBSIZE;
260 dqb->dqb_ihardlimit = dqb2.dqb_ihardlimit;
261 dqb->dqb_isoftlimit = dqb2.dqb_isoftlimit;
262 dqb->dqb_curinodes = dqb2.dqb_curinodes;
263 dqb->dqb_btime = dqb2.dqb_btime;
264 dqb->dqb_itime = dqb2.dqb_itime;
265 dqb->bsize = DEV_QBSIZE;
268 else /* if (kernel_iface == IFACE_VFSOLD) */
270 struct dqblk_v1 dqb1;
272 ret = quotactl(QCMD(Q_V1_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb1);
275 dqb->dqb_bhardlimit = dqb1.dqb_bhardlimit;
276 dqb->dqb_bsoftlimit = dqb1.dqb_bsoftlimit;
277 dqb->dqb_curblocks = dqb1.dqb_curblocks;
278 dqb->dqb_ihardlimit = dqb1.dqb_ihardlimit;
279 dqb->dqb_isoftlimit = dqb1.dqb_isoftlimit;
280 dqb->dqb_curinodes = dqb1.dqb_curinodes;
281 dqb->dqb_btime = dqb1.dqb_btime;
282 dqb->dqb_itime = dqb1.dqb_itime;
283 dqb->bsize = DEV_QBSIZE;
291 #if defined(HAVE_SYS_MNTTAB_H) || defined(__svr4__)
293 * Return the mount point associated with the filesystem
294 * on which "file" resides. Returns NULL on failure.
304 static struct mnttab mnt;
306 if ( stat( file, &sb ) < 0 ) {
311 if (( mtab = fopen( "/etc/mnttab", "r" )) == NULL ) {
315 while ( getmntent( mtab, &mnt ) == 0 ) {
317 if ( (stat( mnt.mnt_special, &sb ) == 0) && (devno == sb.st_rdev)) {
319 return mnt.mnt_mountp;
322 /* check for nfs. we probably should use
323 * strcmp(mnt.mnt_fstype, MNTTYPE_NFS), but that's not as fast. */
324 if ((stat(mnt.mnt_mountp, &sb) == 0) && (devno == sb.st_dev) &&
325 strchr(mnt.mnt_special, ':')) {
328 return mnt.mnt_special;
339 * Return the block-special device name associated with the filesystem
340 * on which "file" resides. Returns NULL on failure.
348 static struct fs_data fsd;
350 if ( getmnt(0, &fsd, 0, STAT_ONE, file ) < 0 ) {
351 LOG(log_info, logtype_afpd, "special: getmnt %s: %s", file, strerror(errno) );
355 /* XXX: does this really detect an nfs mounted fs? */
356 if (strchr(fsd.fd_req.devname, ':'))
358 return( fsd.fd_req.devname );
362 #if (defined(HAVE_SYS_MOUNT_H) && !defined(__linux__)) || defined(BSD4_4) || defined(_IBMR2)
369 static struct statfs sfs;
371 if ( statfs( file, &sfs ) < 0 ) {
376 /* Digital UNIX: The struct sfs contains a field sfs.f_type,
377 * the MOUNT_* constants are defined in <sys/mount.h> */
378 if ((sfs.f_type == MOUNT_NFS)||(sfs.f_type == MOUNT_NFS3))
380 /* XXX: make sure this really detects an nfs mounted fs */
381 if (strchr(sfs.f_mntfromname, ':'))
384 return( sfs.f_mntfromname );
400 if ( stat( file, &sb ) < 0 ) {
405 if (( mtab = setmntent( "/etc/mtab", "r" )) == NULL ) {
409 while (( mnt = getmntent( mtab )) != NULL ) {
410 /* check for local fs */
411 if ( (stat( mnt->mnt_fsname, &sb ) == 0) && devno == sb.st_rdev) {
416 /* check for an nfs mount entry. the alternative is to use
417 * strcmp(mnt->mnt_type, MNTTYPE_NFS) instead of the strchr. */
418 if ((stat(mnt->mnt_dir, &sb) == 0) && (devno == sb.st_dev) &&
419 strchr(mnt->mnt_fsname, ':')) {
431 if (strcmp(mnt->mnt_type, "xfs") == 0)
435 return( mnt->mnt_fsname );
440 #endif /* __svr4__ */
443 static int getfsquota(vol, uid, dq)
455 memset(&dqg, 0, sizeof(dqg));
460 qc.addr = (caddr_t)dq;
461 if ( ioctl( vol->v_qfd, Q_QUOTACTL, &qc ) < 0 ) {
462 return( AFPERR_PARAM );
467 if ( quota( Q_GETDLIM, uid, vol->v_gvs, dq ) != 0 ) {
468 return( AFPERR_PARAM );
477 #define QCMD(a,b) (a)
481 /* for group quotas. we only use these if the user belongs
486 if ( seteuid( getuid() ) == 0 ) {
487 if ( quotactl( vol->v_path, QCMD(Q_GETQUOTA,USRQUOTA),
488 uid, (char *)dq ) != 0 ) {
489 /* try group quotas */
491 if ( quotactl(vol->v_path, QCMD(Q_GETQUOTA, GRPQUOTA),
492 groups[0], (char *) &dqg) != 0 ) {
494 return( AFPERR_PARAM );
502 if ( seteuid( getuid() ) == 0 ) {
503 if ( quotactl( vol->v_path, QCMD(Q_GETQUOTA, USRQUOTA),
504 uid, (char *)dq ) != 0 ) {
506 return ( AFPERR_PARAM );
512 if (get_linux_quota (WANT_USER_QUOTA, vol->v_gvs, uid, dq) !=0) {
513 return( AFPERR_PARAM );
516 if (get_linux_quota(WANT_GROUP_QUOTA, vol->v_gvs, getegid(), &dqg) != 0) {
518 LOG(log_debug, logtype_afpd, "group quota did not work!" );
519 #endif /* DEBUG_QUOTA */
521 return AFP_OK; /* no need to check user vs group quota */
527 /* return either the group quota entry or user quota entry,
528 whichever has the least amount of space remaining
531 /* if user space remaining > group space remaining */
533 /* if overquota, free space is 0 otherwise hard-current */
534 ( overquota( dq ) ? 0 : ( dq->dqb_bhardlimit ? dq->dqb_bhardlimit -
535 dq->dqb_curblocks : ~((u_int64_t) 0) ) )
539 ( overquota( &dqg ) ? 0 : ( dqg.dqb_bhardlimit ? dqg.dqb_bhardlimit -
540 dqg.dqb_curblocks : ~((u_int64_t) 0) ) )
544 /* use group quota limits rather than user limits */
545 dq->dqb_curblocks = dqg.dqb_curblocks;
546 dq->dqb_bhardlimit = dqg.dqb_bhardlimit;
547 dq->dqb_bsoftlimit = dqg.dqb_bsoftlimit;
548 dq->dqb_btimelimit = dqg.dqb_btimelimit;
554 #endif /* __svr4__ */
560 static int getquota( vol, dq, bsize)
563 const u_int32_t bsize;
568 char buf[ MAXPATHLEN + 1];
570 if ( vol->v_qfd == -1 && vol->v_gvs == NULL) {
571 if (( p = mountp( vol->v_path, &vol->v_nfs)) == NULL ) {
572 LOG(log_info, logtype_afpd, "getquota: mountp %s fails", vol->v_path );
573 return( AFPERR_PARAM );
577 if (( vol->v_gvs = (char *)malloc( strlen( p ) + 1 )) == NULL ) {
578 LOG(log_error, logtype_afpd, "getquota: malloc: %s", strerror(errno) );
581 strcpy( vol->v_gvs, p );
584 sprintf( buf, "%s/quotas", p );
585 if (( vol->v_qfd = open( buf, O_RDONLY, 0 )) < 0 ) {
586 LOG(log_info, logtype_afpd, "open %s: %s", buf, strerror(errno) );
587 return( AFPERR_PARAM );
593 if ( vol->v_gvs == NULL ) {
594 if (( p = special( vol->v_path, &vol->v_nfs )) == NULL ) {
595 LOG(log_info, logtype_afpd, "getquota: special %s fails", vol->v_path );
596 return( AFPERR_PARAM );
599 if (( vol->v_gvs = (char *)malloc( strlen( p ) + 1 )) == NULL ) {
600 LOG(log_error, logtype_afpd, "getquota: malloc: %s", strerror(errno) );
603 strcpy( vol->v_gvs, p );
608 /* Digital UNIX: Two forms of specifying an NFS filesystem are possible,
609 either 'hostname:path' or 'path@hostname' (Ultrix heritage) */
612 char pathstring[MNAMELEN];
613 /* MNAMELEN ist defined in <sys/mount.h> */
616 if ((hostpath = strchr(vol->v_gvs,'@')) != NULL ) {
617 /* convert 'path@hostname' to 'hostname:path',
618 * call getnfsquota(),
619 * convert 'hostname:path' back to 'path@hostname' */
621 sprintf(pathstring,"%s:%s",hostpath+1,vol->v_gvs);
622 strcpy(vol->v_gvs,pathstring);
624 result = getnfsquota(vol, uuid, bsize, dq);
626 hostpath = strchr(vol->v_gvs,':');
628 sprintf(pathstring,"%s@%s",hostpath+1,vol->v_gvs);
629 strcpy(vol->v_gvs,pathstring);
634 /* vol->v_gvs is of the form 'hostname:path' */
635 return getnfsquota(vol, uuid, bsize, dq);
637 /* local filesystem */
638 return getfsquota(vol, uuid, dq);
641 return vol->v_nfs ? getnfsquota(vol, uuid, bsize, dq) :
642 getfsquota(vol, uuid, dq);
646 static int overquota( dqblk )
651 if ( dqblk->dqb_curblocks > dqblk->dqb_bhardlimit &&
652 dqblk->dqb_bhardlimit != 0 ) {
656 if ( dqblk->dqb_curblocks < dqblk->dqb_bsoftlimit ||
657 dqblk->dqb_bsoftlimit == 0 ) {
661 if ( dqblk->dqb_bwarn ) {
665 if ( gettimeofday( &tv, 0 ) < 0 ) {
666 LOG(log_error, logtype_afpd, "overquota: gettimeofday: %s", strerror(errno) );
667 return( AFPERR_PARAM );
669 if ( dqblk->dqb_btimelimit && dqblk->dqb_btimelimit > tv.tv_sec ) {
677 * This next bit is basically for linux -- everything is fine
678 * if you use 1k blocks... but if you try (for example) to mount
679 * a volume via nfs from a netapp (which might use 4k blocks) everything
680 * gets reported improperly. I have no idea about dbtob on other
684 #ifdef HAVE_BROKEN_DBTOB
686 #define dbtob(a, b) ((VolSpace)((VolSpace)(a) * (VolSpace)(b)))
687 #define HAVE_2ARG_DBTOB
691 #define dbtob(a) ((a) << 10)
694 /* i do the cast to VolSpace here to make sure that 64-bit shifts
696 #ifdef HAVE_2ARG_DBTOB
697 #define tobytes(a, b) dbtob((VolSpace) (a), (VolSpace) (b))
699 #define tobytes(a, b) dbtob((VolSpace) (a))
702 int uquota_getvolspace( vol, bfree, btotal, bsize)
704 VolSpace *bfree, *btotal;
705 const u_int32_t bsize;
707 u_int64_t this_bsize;
712 if (getquota( vol, &dqblk, bsize) != 0 ) {
713 return( AFPERR_PARAM );
717 this_bsize = dqblk.bsize;
721 LOG(log_info, logtype_afpd, "after calling getquota in uquota_getvolspace!" );
722 LOG(log_info, logtype_afpd, "dqb_ihardlimit: %u", dqblk.dqb_ihardlimit );
723 LOG(log_info, logtype_afpd, "dqb_isoftlimit: %u", dqblk.dqb_isoftlimit );
724 LOG(log_info, logtype_afpd, "dqb_curinodes : %u", dqblk.dqb_curinodes );
725 LOG(log_info, logtype_afpd, "dqb_bhardlimit: %u", dqblk.dqb_bhardlimit );
726 LOG(log_info, logtype_afpd, "dqb_bsoftlimit: %u", dqblk.dqb_bsoftlimit );
727 LOG(log_info, logtype_afpd, "dqb_curblocks : %u", dqblk.dqb_curblocks );
728 LOG(log_info, logtype_afpd, "dqb_btime : %u", dqblk.dqb_btime );
729 LOG(log_info, logtype_afpd, "dqb_itime : %u", dqblk.dqb_itime );
730 LOG(log_info, logtype_afpd, "bsize/this_bsize : %u/%u", bsize, this_bsize );
731 LOG(log_info, logtype_afpd, "dqblk.dqb_bhardlimit size: %u", tobytes( dqblk.dqb_bhardlimit, this_bsize ));
732 LOG(log_info, logtype_afpd, "dqblk.dqb_bsoftlimit size: %u", tobytes( dqblk.dqb_bsoftlimit, this_bsize ));
733 LOG(log_info, logtype_afpd, "dqblk.dqb_curblocks size: %u", tobytes( dqblk.dqb_curblocks, this_bsize ));
734 #endif /* DEBUG_QUOTA */
736 /* no limit set for this user. it might be set in the future. */
737 if (dqblk.dqb_bsoftlimit == 0 && dqblk.dqb_bhardlimit == 0) {
738 *btotal = *bfree = ~((VolSpace) 0);
739 } else if ( overquota( &dqblk )) {
740 if ( tobytes( dqblk.dqb_curblocks, this_bsize ) > tobytes( dqblk.dqb_bsoftlimit, this_bsize ) ) {
741 *btotal = tobytes( dqblk.dqb_curblocks, this_bsize );
745 *btotal = tobytes( dqblk.dqb_bsoftlimit, this_bsize );
746 *bfree = tobytes( dqblk.dqb_bsoftlimit, this_bsize ) -
747 tobytes( dqblk.dqb_curblocks, this_bsize );
750 *btotal = tobytes( dqblk.dqb_bhardlimit, this_bsize );
751 *bfree = tobytes( dqblk.dqb_bhardlimit, this_bsize ) -
752 tobytes( dqblk.dqb_curblocks, this_bsize );
756 LOG(log_info, logtype_afpd, "bfree : %u", *bfree );
757 LOG(log_info, logtype_afpd, "btotal : %u", *btotal );
758 LOG(log_info, logtype_afpd, "bfree : %uKB", *bfree/1024 );
759 LOG(log_info, logtype_afpd, "btotal : %uKB", *btotal/1024 );