2 * $Id: quota.c,v 1.29 2007-12-03 14:50:39 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>
53 #define WANT_USER_QUOTA 0
54 #define WANT_GROUP_QUOTA 1
56 #ifdef NEED_QUOTACTL_WRAPPER
57 int quotactl(int cmd, const char *special, int id, caddr_t addr)
59 return syscall(__NR_quotactl, cmd, special, id, addr);
61 #endif /* NEED_QUOTACTL_WRAPPER */
63 static int overquota( struct dqblk *);
67 #ifdef HAVE_LINUX_XQM_H
68 #include <linux/xqm.h>
72 #define HAVE_LINUX_XQM_H
74 #ifdef HAVE_LINUX_DQBLK_XFS_H
75 #include <linux/dqblk_xfs.h>
76 #define HAVE_LINUX_XQM_H
77 #endif /* HAVE_LINUX_DQBLK_XFS_H */
78 #endif /* HAVE_XFS_XQM_H */
79 #endif /* HAVE_LINUX_XQM_H */
81 #include <linux/unistd.h>
83 static int is_xfs = 0;
85 static int get_linux_xfs_quota(int, char*, uid_t, struct dqblk *);
86 static int get_linux_fs_quota(int, char*, uid_t, struct dqblk *);
88 /* format supported by current kernel */
89 static int kernel_iface = IFACE_UNSET;
92 ** Check kernel quota version
93 ** Taken from quota-tools 3.08 by Jan Kara <jack@suse.cz>
95 static void linuxquota_get_api( void )
97 #ifndef LINUX_API_VERSION
100 if (stat("/proc/sys/fs/quota", &st) == 0) {
101 kernel_iface = IFACE_GENERIC;
104 struct dqstats_v2 v2_stats;
105 struct sigaction sig;
106 struct sigaction oldsig;
108 /* This signal handling is needed because old kernels send us SIGSEGV as they try to resolve the device */
109 sig.sa_handler = SIG_IGN;
110 sig.sa_sigaction = NULL;
112 sigemptyset(&sig.sa_mask);
113 if (sigaction(SIGSEGV, &sig, &oldsig) < 0) {
114 LOG( log_error, logtype_afpd, "cannot set SEGV signal handler: %s", strerror(errno));
117 if (quotactl(QCMD(Q_V2_GETSTATS, 0), NULL, 0, (void *)&v2_stats) >= 0) {
118 kernel_iface = IFACE_VFSV0;
120 else if (errno != ENOSYS && errno != ENOTSUP) {
121 /* RedHat 7.1 (2.4.2-2) newquota check
122 * Q_V2_GETSTATS in it's old place, Q_GETQUOTA in the new place
123 * (they haven't moved Q_GETSTATS to its new value) */
126 char tmp[1024]; /* Just temporary buffer */
128 if (quotactl(QCMD(Q_V1_GETSTATS, 0), NULL, 0, tmp))
130 if (quotactl(QCMD(Q_V1_GETQUOTA, 0), "/dev/null", 0, tmp))
133 /* On a RedHat 2.4.2-2 we expect 0, EINVAL
134 * On a 2.4.x we expect 0, ENOENT
135 * On a 2.4.x-ac we wont get here */
136 if (err_stat == 0 && err_quota == EINVAL) {
137 kernel_iface = IFACE_VFSV0;
140 kernel_iface = IFACE_VFSOLD;
144 /* This branch is *not* in quota-tools 3.08
145 ** but without it quota version is not correctly
146 ** identified for the original SuSE 8.0 kernel */
147 unsigned int vers_no;
150 if ((qf = fopen("/proc/fs/quota", "r"))) {
151 if (fscanf(qf, "Version %u", &vers_no) == 1) {
152 if ( (vers_no == (6*10000 + 5*100 + 0)) ||
153 (vers_no == (6*10000 + 5*100 + 1)) ) {
154 kernel_iface = IFACE_VFSV0;
160 if (sigaction(SIGSEGV, &oldsig, NULL) < 0) {
161 LOG(log_error, logtype_afpd, "cannot reset signal handler: %s", strerror(errno));
167 if (kernel_iface == IFACE_UNSET)
168 kernel_iface = IFACE_VFSOLD;
170 #else /* defined LINUX_API_VERSION */
171 kernel_iface = LINUX_API_VERSION;
175 /****************************************************************************/
177 static int get_linux_quota(int what, char *path, uid_t euser_id, struct dqblk *dp)
182 r=get_linux_xfs_quota(what, path, euser_id, dp);
184 r=get_linux_fs_quota(what, path, euser_id, dp);
189 /****************************************************************************
190 Abstract out the XFS Quota Manager quota get call.
191 ****************************************************************************/
193 static int get_linux_xfs_quota(what, path, euser_id, dqb)
200 #ifdef HAVE_LINUX_XQM_H
201 struct fs_disk_quota D;
203 memset (&D, 0, sizeof(D));
205 if ((ret = quotactl(QCMD(Q_XGETQUOTA,(what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t)&D)))
208 dqb->bsize = (u_int64_t)512;
209 dqb->dqb_bsoftlimit = (u_int64_t)D.d_blk_softlimit;
210 dqb->dqb_bhardlimit = (u_int64_t)D.d_blk_hardlimit;
211 dqb->dqb_ihardlimit = (u_int64_t)D.d_ino_hardlimit;
212 dqb->dqb_isoftlimit = (u_int64_t)D.d_ino_softlimit;
213 dqb->dqb_curinodes = (u_int64_t)D.d_icount;
214 dqb->dqb_curblocks = (u_int64_t)D.d_bcount;
220 ** Wrapper for the quotactl(GETQUOTA) call.
221 ** For API v2 the results are copied back into a v1 structure.
222 ** Taken from quota-1.4.8 perl module
224 static int get_linux_fs_quota( what, path, euser_id, dqb)
232 if (kernel_iface == IFACE_UNSET)
233 linuxquota_get_api();
235 if (kernel_iface == IFACE_GENERIC)
237 struct dqblk_v3 dqb3;
239 ret = quotactl(QCMD(Q_V3_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb3);
242 dqb->dqb_bhardlimit = dqb3.dqb_bhardlimit;
243 dqb->dqb_bsoftlimit = dqb3.dqb_bsoftlimit;
244 dqb->dqb_curblocks = dqb3.dqb_curspace / DEV_QBSIZE;
245 dqb->dqb_ihardlimit = dqb3.dqb_ihardlimit;
246 dqb->dqb_isoftlimit = dqb3.dqb_isoftlimit;
247 dqb->dqb_curinodes = dqb3.dqb_curinodes;
248 dqb->dqb_btime = dqb3.dqb_btime;
249 dqb->dqb_itime = dqb3.dqb_itime;
250 dqb->bsize = DEV_QBSIZE;
253 else if (kernel_iface == IFACE_VFSV0)
255 struct dqblk_v2 dqb2;
257 ret = quotactl(QCMD(Q_V2_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb2);
260 dqb->dqb_bhardlimit = dqb2.dqb_bhardlimit;
261 dqb->dqb_bsoftlimit = dqb2.dqb_bsoftlimit;
262 dqb->dqb_curblocks = dqb2.dqb_curspace / DEV_QBSIZE;
263 dqb->dqb_ihardlimit = dqb2.dqb_ihardlimit;
264 dqb->dqb_isoftlimit = dqb2.dqb_isoftlimit;
265 dqb->dqb_curinodes = dqb2.dqb_curinodes;
266 dqb->dqb_btime = dqb2.dqb_btime;
267 dqb->dqb_itime = dqb2.dqb_itime;
268 dqb->bsize = DEV_QBSIZE;
271 else /* if (kernel_iface == IFACE_VFSOLD) */
273 struct dqblk_v1 dqb1;
275 ret = quotactl(QCMD(Q_V1_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb1);
278 dqb->dqb_bhardlimit = dqb1.dqb_bhardlimit;
279 dqb->dqb_bsoftlimit = dqb1.dqb_bsoftlimit;
280 dqb->dqb_curblocks = dqb1.dqb_curblocks;
281 dqb->dqb_ihardlimit = dqb1.dqb_ihardlimit;
282 dqb->dqb_isoftlimit = dqb1.dqb_isoftlimit;
283 dqb->dqb_curinodes = dqb1.dqb_curinodes;
284 dqb->dqb_btime = dqb1.dqb_btime;
285 dqb->dqb_itime = dqb1.dqb_itime;
286 dqb->bsize = DEV_QBSIZE;
294 #if defined(HAVE_SYS_MNTTAB_H) || defined(__svr4__)
296 * Return the mount point associated with the filesystem
297 * on which "file" resides. Returns NULL on failure.
307 static struct mnttab mnt;
309 if ( stat( file, &sb ) < 0 ) {
314 if (( mtab = fopen( "/etc/mnttab", "r" )) == NULL ) {
318 while ( getmntent( mtab, &mnt ) == 0 ) {
320 if ( (stat( mnt.mnt_special, &sb ) == 0) && (devno == sb.st_rdev)) {
322 return mnt.mnt_mountp;
325 /* check for nfs. we probably should use
326 * strcmp(mnt.mnt_fstype, MNTTYPE_NFS), but that's not as fast. */
327 if ((stat(mnt.mnt_mountp, &sb) == 0) && (devno == sb.st_dev) &&
328 strchr(mnt.mnt_special, ':')) {
331 return mnt.mnt_special;
342 * Return the block-special device name associated with the filesystem
343 * on which "file" resides. Returns NULL on failure.
351 static struct fs_data fsd;
353 if ( getmnt(0, &fsd, 0, STAT_ONE, file ) < 0 ) {
354 LOG(log_info, logtype_afpd, "special: getmnt %s: %s", file, strerror(errno) );
358 /* XXX: does this really detect an nfs mounted fs? */
359 if (strchr(fsd.fd_req.devname, ':'))
361 return( fsd.fd_req.devname );
365 #if (defined(HAVE_SYS_MOUNT_H) && !defined(__linux__)) || defined(BSD4_4) || defined(_IBMR2)
372 static struct statfs sfs;
374 if ( statfs( file, &sfs ) < 0 ) {
379 /* Digital UNIX: The struct sfs contains a field sfs.f_type,
380 * the MOUNT_* constants are defined in <sys/mount.h> */
381 if ((sfs.f_type == MOUNT_NFS)||(sfs.f_type == MOUNT_NFS3))
383 /* XXX: make sure this really detects an nfs mounted fs */
384 if (strchr(sfs.f_mntfromname, ':'))
387 return( sfs.f_mntfromname );
403 if ( stat( file, &sb ) < 0 ) {
408 if (( mtab = setmntent( "/etc/mtab", "r" )) == NULL ) {
412 while (( mnt = getmntent( mtab )) != NULL ) {
413 /* check for local fs */
414 if ( (stat( mnt->mnt_fsname, &sb ) == 0) && devno == sb.st_rdev) {
419 /* check for an nfs mount entry. the alternative is to use
420 * strcmp(mnt->mnt_type, MNTTYPE_NFS) instead of the strchr. */
421 if ((stat(mnt->mnt_dir, &sb) == 0) && (devno == sb.st_dev) &&
422 strchr(mnt->mnt_fsname, ':')) {
434 if (strcmp(mnt->mnt_type, "xfs") == 0)
438 return( mnt->mnt_fsname );
443 #endif /* __svr4__ */
446 static int getfsquota(vol, uid, dq)
458 memset(&dqg, 0, sizeof(dqg));
463 qc.addr = (caddr_t)dq;
464 if ( ioctl( vol->v_qfd, Q_QUOTACTL, &qc ) < 0 ) {
465 return( AFPERR_PARAM );
470 if ( quota( Q_GETDLIM, uid, vol->v_gvs, dq ) != 0 ) {
471 return( AFPERR_PARAM );
480 #define QCMD(a,b) (a)
484 /* for group quotas. we only use these if the user belongs
489 if ( seteuid( getuid() ) == 0 ) {
490 if ( quotactl( vol->v_path, QCMD(Q_GETQUOTA,USRQUOTA),
491 uid, (char *)dq ) != 0 ) {
492 /* try group quotas */
494 if ( quotactl(vol->v_path, QCMD(Q_GETQUOTA, GRPQUOTA),
495 groups[0], (char *) &dqg) != 0 ) {
497 return( AFPERR_PARAM );
505 if ( seteuid( getuid() ) == 0 ) {
506 if ( quotactl( vol->v_path, QCMD(Q_GETQUOTA, USRQUOTA),
507 uid, (char *)dq ) != 0 ) {
509 return ( AFPERR_PARAM );
515 if (get_linux_quota (WANT_USER_QUOTA, vol->v_gvs, uid, dq) !=0) {
516 return( AFPERR_PARAM );
519 if (get_linux_quota(WANT_GROUP_QUOTA, vol->v_gvs, getegid(), &dqg) != 0) {
521 LOG(log_debug, logtype_afpd, "group quota did not work!" );
522 #endif /* DEBUG_QUOTA */
524 return AFP_OK; /* no need to check user vs group quota */
530 /* return either the group quota entry or user quota entry,
531 whichever has the least amount of space remaining
534 /* if user space remaining > group space remaining */
536 /* if overquota, free space is 0 otherwise hard-current */
537 ( overquota( dq ) ? 0 : ( dq->dqb_bhardlimit ? dq->dqb_bhardlimit -
538 dq->dqb_curblocks : ~((u_int64_t) 0) ) )
542 ( overquota( &dqg ) ? 0 : ( dqg.dqb_bhardlimit ? dqg.dqb_bhardlimit -
543 dqg.dqb_curblocks : ~((u_int64_t) 0) ) )
547 /* use group quota limits rather than user limits */
548 dq->dqb_curblocks = dqg.dqb_curblocks;
549 dq->dqb_bhardlimit = dqg.dqb_bhardlimit;
550 dq->dqb_bsoftlimit = dqg.dqb_bsoftlimit;
551 dq->dqb_btimelimit = dqg.dqb_btimelimit;
557 #endif /* __svr4__ */
563 static int getquota( vol, dq, bsize)
566 const u_int32_t bsize;
571 char buf[ MAXPATHLEN + 1];
573 if ( vol->v_qfd == -1 && vol->v_gvs == NULL) {
574 if (( p = mountp( vol->v_path, &vol->v_nfs)) == NULL ) {
575 LOG(log_info, logtype_afpd, "getquota: mountp %s fails", vol->v_path );
576 return( AFPERR_PARAM );
580 if (( vol->v_gvs = (char *)malloc( strlen( p ) + 1 )) == NULL ) {
581 LOG(log_error, logtype_afpd, "getquota: malloc: %s", strerror(errno) );
584 strcpy( vol->v_gvs, p );
587 sprintf( buf, "%s/quotas", p );
588 if (( vol->v_qfd = open( buf, O_RDONLY, 0 )) < 0 ) {
589 LOG(log_info, logtype_afpd, "open %s: %s", buf, strerror(errno) );
590 return( AFPERR_PARAM );
596 if ( vol->v_gvs == NULL ) {
597 if (( p = special( vol->v_path, &vol->v_nfs )) == NULL ) {
598 LOG(log_info, logtype_afpd, "getquota: special %s fails", vol->v_path );
599 return( AFPERR_PARAM );
602 if (( vol->v_gvs = (char *)malloc( strlen( p ) + 1 )) == NULL ) {
603 LOG(log_error, logtype_afpd, "getquota: malloc: %s", strerror(errno) );
606 strcpy( vol->v_gvs, p );
611 /* Digital UNIX: Two forms of specifying an NFS filesystem are possible,
612 either 'hostname:path' or 'path@hostname' (Ultrix heritage) */
615 char pathstring[MNAMELEN];
616 /* MNAMELEN ist defined in <sys/mount.h> */
619 if ((hostpath = strchr(vol->v_gvs,'@')) != NULL ) {
620 /* convert 'path@hostname' to 'hostname:path',
621 * call getnfsquota(),
622 * convert 'hostname:path' back to 'path@hostname' */
624 sprintf(pathstring,"%s:%s",hostpath+1,vol->v_gvs);
625 strcpy(vol->v_gvs,pathstring);
627 result = getnfsquota(vol, uuid, bsize, dq);
629 hostpath = strchr(vol->v_gvs,':');
631 sprintf(pathstring,"%s@%s",hostpath+1,vol->v_gvs);
632 strcpy(vol->v_gvs,pathstring);
637 /* vol->v_gvs is of the form 'hostname:path' */
638 return getnfsquota(vol, uuid, bsize, dq);
640 /* local filesystem */
641 return getfsquota(vol, uuid, dq);
644 return vol->v_nfs ? getnfsquota(vol, uuid, bsize, dq) :
645 getfsquota(vol, uuid, dq);
649 static int overquota( dqblk )
654 if ( dqblk->dqb_curblocks > dqblk->dqb_bhardlimit &&
655 dqblk->dqb_bhardlimit != 0 ) {
659 if ( dqblk->dqb_curblocks < dqblk->dqb_bsoftlimit ||
660 dqblk->dqb_bsoftlimit == 0 ) {
664 if ( dqblk->dqb_bwarn ) {
668 if ( gettimeofday( &tv, 0 ) < 0 ) {
669 LOG(log_error, logtype_afpd, "overquota: gettimeofday: %s", strerror(errno) );
670 return( AFPERR_PARAM );
672 if ( dqblk->dqb_btimelimit && dqblk->dqb_btimelimit > tv.tv_sec ) {
680 * This next bit is basically for linux -- everything is fine
681 * if you use 1k blocks... but if you try (for example) to mount
682 * a volume via nfs from a netapp (which might use 4k blocks) everything
683 * gets reported improperly. I have no idea about dbtob on other
687 #ifdef HAVE_BROKEN_DBTOB
689 #define dbtob(a, b) ((VolSpace)((VolSpace)(a) * (VolSpace)(b)))
690 #define HAVE_2ARG_DBTOB
694 #define dbtob(a) ((a) << 10)
697 /* i do the cast to VolSpace here to make sure that 64-bit shifts
699 #ifdef HAVE_2ARG_DBTOB
700 #define tobytes(a, b) dbtob((VolSpace) (a), (VolSpace) (b))
702 #define tobytes(a, b) dbtob((VolSpace) (a))
705 int uquota_getvolspace( vol, bfree, btotal, bsize)
707 VolSpace *bfree, *btotal;
708 const u_int32_t bsize;
710 u_int64_t this_bsize;
715 if (getquota( vol, &dqblk, bsize) != 0 ) {
716 return( AFPERR_PARAM );
720 this_bsize = dqblk.bsize;
724 LOG(log_info, logtype_afpd, "after calling getquota in uquota_getvolspace!" );
725 LOG(log_info, logtype_afpd, "dqb_ihardlimit: %u", dqblk.dqb_ihardlimit );
726 LOG(log_info, logtype_afpd, "dqb_isoftlimit: %u", dqblk.dqb_isoftlimit );
727 LOG(log_info, logtype_afpd, "dqb_curinodes : %u", dqblk.dqb_curinodes );
728 LOG(log_info, logtype_afpd, "dqb_bhardlimit: %u", dqblk.dqb_bhardlimit );
729 LOG(log_info, logtype_afpd, "dqb_bsoftlimit: %u", dqblk.dqb_bsoftlimit );
730 LOG(log_info, logtype_afpd, "dqb_curblocks : %u", dqblk.dqb_curblocks );
731 LOG(log_info, logtype_afpd, "dqb_btime : %u", dqblk.dqb_btime );
732 LOG(log_info, logtype_afpd, "dqb_itime : %u", dqblk.dqb_itime );
733 LOG(log_info, logtype_afpd, "bsize/this_bsize : %u/%u", bsize, this_bsize );
734 LOG(log_info, logtype_afpd, "dqblk.dqb_bhardlimit size: %u", tobytes( dqblk.dqb_bhardlimit, this_bsize ));
735 LOG(log_info, logtype_afpd, "dqblk.dqb_bsoftlimit size: %u", tobytes( dqblk.dqb_bsoftlimit, this_bsize ));
736 LOG(log_info, logtype_afpd, "dqblk.dqb_curblocks size: %u", tobytes( dqblk.dqb_curblocks, this_bsize ));
737 #endif /* DEBUG_QUOTA */
739 /* no limit set for this user. it might be set in the future. */
740 if (dqblk.dqb_bsoftlimit == 0 && dqblk.dqb_bhardlimit == 0) {
741 *btotal = *bfree = ~((VolSpace) 0);
742 } else if ( overquota( &dqblk )) {
743 if ( tobytes( dqblk.dqb_curblocks, this_bsize ) > tobytes( dqblk.dqb_bsoftlimit, this_bsize ) ) {
744 *btotal = tobytes( dqblk.dqb_curblocks, this_bsize );
748 *btotal = tobytes( dqblk.dqb_bsoftlimit, this_bsize );
749 *bfree = tobytes( dqblk.dqb_bsoftlimit, this_bsize ) -
750 tobytes( dqblk.dqb_curblocks, this_bsize );
753 *btotal = tobytes( dqblk.dqb_bhardlimit, this_bsize );
754 *bfree = tobytes( dqblk.dqb_bhardlimit, this_bsize ) -
755 tobytes( dqblk.dqb_curblocks, this_bsize );
759 LOG(log_info, logtype_afpd, "bfree : %u", *bfree );
760 LOG(log_info, logtype_afpd, "btotal : %u", *btotal );
761 LOG(log_info, logtype_afpd, "bfree : %uKB", *bfree/1024 );
762 LOG(log_info, logtype_afpd, "btotal : %uKB", *btotal/1024 );