2 * $Id: quota.c,v 1.35 2010-04-03 07:11:35 franklahm 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 #include <sys/param.h>
24 #endif /* HAVE_UNISTD_H */
27 #endif /* HAVE_FCNTL_H */
29 #include <atalk/logger.h>
30 #include <atalk/afp.h>
31 #include <atalk/compat.h>
41 #define WANT_USER_QUOTA 0
42 #define WANT_GROUP_QUOTA 1
44 #ifdef NEED_QUOTACTL_WRAPPER
45 int quotactl(int cmd, const char *special, int id, caddr_t addr)
47 return syscall(__NR_quotactl, cmd, special, id, addr);
49 #endif /* NEED_QUOTACTL_WRAPPER */
51 static int overquota( struct dqblk *);
55 #ifdef HAVE_LINUX_XQM_H
56 #include <linux/xqm.h>
60 #define HAVE_LINUX_XQM_H
62 #ifdef HAVE_LINUX_DQBLK_XFS_H
63 #include <linux/dqblk_xfs.h>
64 #define HAVE_LINUX_XQM_H
65 #endif /* HAVE_LINUX_DQBLK_XFS_H */
66 #endif /* HAVE_XFS_XQM_H */
67 #endif /* HAVE_LINUX_XQM_H */
69 #include <linux/unistd.h>
71 static int is_xfs = 0;
73 static int get_linux_xfs_quota(int, char*, uid_t, struct dqblk *);
74 static int get_linux_fs_quota(int, char*, uid_t, struct dqblk *);
76 /* format supported by current kernel */
77 static int kernel_iface = IFACE_UNSET;
80 ** Check kernel quota version
81 ** Taken from quota-tools 3.08 by Jan Kara <jack@suse.cz>
83 static void linuxquota_get_api( void )
85 #ifndef LINUX_API_VERSION
88 if (stat("/proc/sys/fs/quota", &st) == 0) {
89 kernel_iface = IFACE_GENERIC;
92 struct dqstats_v2 v2_stats;
94 struct sigaction oldsig;
96 /* This signal handling is needed because old kernels send us SIGSEGV as they try to resolve the device */
97 sig.sa_handler = SIG_IGN;
98 sig.sa_sigaction = NULL;
100 sigemptyset(&sig.sa_mask);
101 if (sigaction(SIGSEGV, &sig, &oldsig) < 0) {
102 LOG( log_error, logtype_afpd, "cannot set SEGV signal handler: %s", strerror(errno));
105 if (quotactl(QCMD(Q_V2_GETSTATS, 0), NULL, 0, (void *)&v2_stats) >= 0) {
106 kernel_iface = IFACE_VFSV0;
108 else if (errno != ENOSYS && errno != ENOTSUP) {
109 /* RedHat 7.1 (2.4.2-2) newquota check
110 * Q_V2_GETSTATS in it's old place, Q_GETQUOTA in the new place
111 * (they haven't moved Q_GETSTATS to its new value) */
114 char tmp[1024]; /* Just temporary buffer */
116 if (quotactl(QCMD(Q_V1_GETSTATS, 0), NULL, 0, tmp))
118 if (quotactl(QCMD(Q_V1_GETQUOTA, 0), "/dev/null", 0, tmp))
121 /* On a RedHat 2.4.2-2 we expect 0, EINVAL
122 * On a 2.4.x we expect 0, ENOENT
123 * On a 2.4.x-ac we wont get here */
124 if (err_stat == 0 && err_quota == EINVAL) {
125 kernel_iface = IFACE_VFSV0;
128 kernel_iface = IFACE_VFSOLD;
132 /* This branch is *not* in quota-tools 3.08
133 ** but without it quota version is not correctly
134 ** identified for the original SuSE 8.0 kernel */
135 unsigned int vers_no;
138 if ((qf = fopen("/proc/fs/quota", "r"))) {
139 if (fscanf(qf, "Version %u", &vers_no) == 1) {
140 if ( (vers_no == (6*10000 + 5*100 + 0)) ||
141 (vers_no == (6*10000 + 5*100 + 1)) ) {
142 kernel_iface = IFACE_VFSV0;
148 if (sigaction(SIGSEGV, &oldsig, NULL) < 0) {
149 LOG(log_error, logtype_afpd, "cannot reset signal handler: %s", strerror(errno));
155 if (kernel_iface == IFACE_UNSET)
156 kernel_iface = IFACE_VFSOLD;
158 #else /* defined LINUX_API_VERSION */
159 kernel_iface = LINUX_API_VERSION;
163 /****************************************************************************/
165 static int get_linux_quota(int what, char *path, uid_t euser_id, struct dqblk *dp)
170 r=get_linux_xfs_quota(what, path, euser_id, dp);
172 r=get_linux_fs_quota(what, path, euser_id, dp);
177 /****************************************************************************
178 Abstract out the XFS Quota Manager quota get call.
179 ****************************************************************************/
181 static int get_linux_xfs_quota(int what, char *path, uid_t euser_id, struct dqblk *dqb)
184 #ifdef HAVE_LINUX_XQM_H
185 struct fs_disk_quota D;
187 memset (&D, 0, sizeof(D));
189 if ((ret = quotactl(QCMD(Q_XGETQUOTA,(what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t)&D)))
192 dqb->bsize = (u_int64_t)512;
193 dqb->dqb_bsoftlimit = (u_int64_t)D.d_blk_softlimit;
194 dqb->dqb_bhardlimit = (u_int64_t)D.d_blk_hardlimit;
195 dqb->dqb_ihardlimit = (u_int64_t)D.d_ino_hardlimit;
196 dqb->dqb_isoftlimit = (u_int64_t)D.d_ino_softlimit;
197 dqb->dqb_curinodes = (u_int64_t)D.d_icount;
198 dqb->dqb_curblocks = (u_int64_t)D.d_bcount;
204 ** Wrapper for the quotactl(GETQUOTA) call.
205 ** For API v2 the results are copied back into a v1 structure.
206 ** Taken from quota-1.4.8 perl module
208 static int get_linux_fs_quota(int what, char *path, uid_t euser_id, struct dqblk *dqb)
212 if (kernel_iface == IFACE_UNSET)
213 linuxquota_get_api();
215 if (kernel_iface == IFACE_GENERIC)
217 struct dqblk_v3 dqb3;
219 ret = quotactl(QCMD(Q_V3_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb3);
222 dqb->dqb_bhardlimit = dqb3.dqb_bhardlimit;
223 dqb->dqb_bsoftlimit = dqb3.dqb_bsoftlimit;
224 dqb->dqb_curblocks = dqb3.dqb_curspace / DEV_QBSIZE;
225 dqb->dqb_ihardlimit = dqb3.dqb_ihardlimit;
226 dqb->dqb_isoftlimit = dqb3.dqb_isoftlimit;
227 dqb->dqb_curinodes = dqb3.dqb_curinodes;
228 dqb->dqb_btime = dqb3.dqb_btime;
229 dqb->dqb_itime = dqb3.dqb_itime;
230 dqb->bsize = DEV_QBSIZE;
233 else if (kernel_iface == IFACE_VFSV0)
235 struct dqblk_v2 dqb2;
237 ret = quotactl(QCMD(Q_V2_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb2);
240 dqb->dqb_bhardlimit = dqb2.dqb_bhardlimit;
241 dqb->dqb_bsoftlimit = dqb2.dqb_bsoftlimit;
242 dqb->dqb_curblocks = dqb2.dqb_curspace / DEV_QBSIZE;
243 dqb->dqb_ihardlimit = dqb2.dqb_ihardlimit;
244 dqb->dqb_isoftlimit = dqb2.dqb_isoftlimit;
245 dqb->dqb_curinodes = dqb2.dqb_curinodes;
246 dqb->dqb_btime = dqb2.dqb_btime;
247 dqb->dqb_itime = dqb2.dqb_itime;
248 dqb->bsize = DEV_QBSIZE;
251 else /* if (kernel_iface == IFACE_VFSOLD) */
253 struct dqblk_v1 dqb1;
255 ret = quotactl(QCMD(Q_V1_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb1);
258 dqb->dqb_bhardlimit = dqb1.dqb_bhardlimit;
259 dqb->dqb_bsoftlimit = dqb1.dqb_bsoftlimit;
260 dqb->dqb_curblocks = dqb1.dqb_curblocks;
261 dqb->dqb_ihardlimit = dqb1.dqb_ihardlimit;
262 dqb->dqb_isoftlimit = dqb1.dqb_isoftlimit;
263 dqb->dqb_curinodes = dqb1.dqb_curinodes;
264 dqb->dqb_btime = dqb1.dqb_btime;
265 dqb->dqb_itime = dqb1.dqb_itime;
266 dqb->bsize = DEV_QBSIZE;
274 #if defined(HAVE_SYS_MNTTAB_H) || defined(__svr4__)
276 * Return the mount point associated with the filesystem
277 * on which "file" resides. Returns NULL on failure.
280 mountp( char *file, int *nfs)
285 static struct mnttab mnt;
287 if ( lstat( file, &sb ) < 0 ) {
292 if (( mtab = fopen( "/etc/mnttab", "r" )) == NULL ) {
296 while ( getmntent( mtab, &mnt ) == 0 ) {
298 if ( (lstat( mnt.mnt_special, &sb ) == 0) && (devno == sb.st_rdev)) {
300 return mnt.mnt_mountp;
303 /* check for nfs. we probably should use
304 * strcmp(mnt.mnt_fstype, MNTTYPE_NFS), but that's not as fast. */
305 if ((lstat(mnt.mnt_mountp, &sb) == 0) && (devno == sb.st_dev) &&
306 strchr(mnt.mnt_special, ':')) {
309 return mnt.mnt_special;
320 * Return the block-special device name associated with the filesystem
321 * on which "file" resides. Returns NULL on failure.
325 special( char *file, int *nfs)
327 static struct fs_data fsd;
329 if ( getmnt(0, &fsd, 0, STAT_ONE, file ) < 0 ) {
330 LOG(log_info, logtype_afpd, "special: getmnt %s: %s", file, strerror(errno) );
334 /* XXX: does this really detect an nfs mounted fs? */
335 if (strchr(fsd.fd_req.devname, ':'))
337 return( fsd.fd_req.devname );
341 #if (defined(HAVE_SYS_MOUNT_H) && !defined(__linux__)) || defined(BSD4_4) || defined(_IBMR2)
344 special(char *file, int *nfs)
346 static struct statfs sfs;
348 if ( statfs( file, &sfs ) < 0 ) {
353 /* Digital UNIX: The struct sfs contains a field sfs.f_type,
354 * the MOUNT_* constants are defined in <sys/mount.h> */
355 if ((sfs.f_type == MOUNT_NFS)||(sfs.f_type == MOUNT_NFS3))
357 /* XXX: make sure this really detects an nfs mounted fs */
358 if (strchr(sfs.f_mntfromname, ':'))
361 return( sfs.f_mntfromname );
367 special(char *file, int *nfs)
375 if ( lstat( file, &sb ) < 0 ) {
380 if (( mtab = setmntent( "/etc/mtab", "r" )) == NULL ) {
384 while (( mnt = getmntent( mtab )) != NULL ) {
385 /* check for local fs */
386 if ( (lstat( mnt->mnt_fsname, &sb ) == 0) && devno == sb.st_rdev) {
391 /* check for an nfs mount entry. the alternative is to use
392 * strcmp(mnt->mnt_type, MNTTYPE_NFS) instead of the strchr. */
393 if ((lstat(mnt->mnt_dir, &sb) == 0) && (devno == sb.st_dev) &&
394 strchr(mnt->mnt_fsname, ':')) {
406 if (strcmp(mnt->mnt_type, "xfs") == 0)
410 return( mnt->mnt_fsname );
415 #endif /* __svr4__ */
418 static int getfsquota(struct vol *vol, const int uid, struct dqblk *dq)
427 memset(&dqg, 0, sizeof(dqg));
432 qc.addr = (caddr_t)dq;
433 if ( ioctl( vol->v_qfd, Q_QUOTACTL, &qc ) < 0 ) {
434 return( AFPERR_PARAM );
439 if ( quota( Q_GETDLIM, uid, vol->v_gvs, dq ) != 0 ) {
440 return( AFPERR_PARAM );
449 #define QCMD(a,b) (a)
453 /* for group quotas. we only use these if the user belongs
458 if ( seteuid( getuid() ) == 0 ) {
459 if ( quotactl( vol->v_path, QCMD(Q_GETQUOTA,USRQUOTA),
460 uid, (char *)dq ) != 0 ) {
461 /* try group quotas */
463 if ( quotactl(vol->v_path, QCMD(Q_GETQUOTA, GRPQUOTA),
464 groups[0], (char *) &dqg) != 0 ) {
466 return( AFPERR_PARAM );
474 if ( seteuid( getuid() ) == 0 ) {
475 if ( quotactl( vol->v_path, QCMD(Q_GETQUOTA, USRQUOTA),
476 uid, (char *)dq ) != 0 ) {
478 return ( AFPERR_PARAM );
484 if (get_linux_quota (WANT_USER_QUOTA, vol->v_gvs, uid, dq) !=0) {
485 return( AFPERR_PARAM );
488 if (get_linux_quota(WANT_GROUP_QUOTA, vol->v_gvs, getegid(), &dqg) != 0) {
490 LOG(log_debug, logtype_afpd, "group quota did not work!" );
491 #endif /* DEBUG_QUOTA */
493 return AFP_OK; /* no need to check user vs group quota */
499 /* return either the group quota entry or user quota entry,
500 whichever has the least amount of space remaining
503 /* if user space remaining > group space remaining */
505 /* if overquota, free space is 0 otherwise hard-current */
506 ( overquota( dq ) ? 0 : ( dq->dqb_bhardlimit ? dq->dqb_bhardlimit -
507 dq->dqb_curblocks : ~((u_int64_t) 0) ) )
511 ( overquota( &dqg ) ? 0 : ( dqg.dqb_bhardlimit ? dqg.dqb_bhardlimit -
512 dqg.dqb_curblocks : ~((u_int64_t) 0) ) )
516 /* use group quota limits rather than user limits */
517 dq->dqb_curblocks = dqg.dqb_curblocks;
518 dq->dqb_bhardlimit = dqg.dqb_bhardlimit;
519 dq->dqb_bsoftlimit = dqg.dqb_bsoftlimit;
520 dq->dqb_btimelimit = dqg.dqb_btimelimit;
526 #endif /* __svr4__ */
532 static int getquota( struct vol *vol, struct dqblk *dq, const u_int32_t bsize)
537 char buf[ MAXPATHLEN + 1];
539 if ( vol->v_qfd == -1 && vol->v_gvs == NULL) {
540 if (( p = mountp( vol->v_path, &vol->v_nfs)) == NULL ) {
541 LOG(log_info, logtype_afpd, "getquota: mountp %s fails", vol->v_path );
542 return( AFPERR_PARAM );
546 if (( vol->v_gvs = (char *)malloc( strlen( p ) + 1 )) == NULL ) {
547 LOG(log_error, logtype_afpd, "getquota: malloc: %s", strerror(errno) );
550 strcpy( vol->v_gvs, p );
553 sprintf( buf, "%s/quotas", p );
554 if (( vol->v_qfd = open( buf, O_RDONLY, 0 )) < 0 ) {
555 LOG(log_info, logtype_afpd, "open %s: %s", buf, strerror(errno) );
556 return( AFPERR_PARAM );
562 if ( vol->v_gvs == NULL ) {
563 if (( p = special( vol->v_path, &vol->v_nfs )) == NULL ) {
564 LOG(log_info, logtype_afpd, "getquota: special %s fails", vol->v_path );
565 return( AFPERR_PARAM );
568 if (( vol->v_gvs = (char *)malloc( strlen( p ) + 1 )) == NULL ) {
569 LOG(log_error, logtype_afpd, "getquota: malloc: %s", strerror(errno) );
572 strcpy( vol->v_gvs, p );
577 /* Digital UNIX: Two forms of specifying an NFS filesystem are possible,
578 either 'hostname:path' or 'path@hostname' (Ultrix heritage) */
581 char pathstring[MNAMELEN];
582 /* MNAMELEN ist defined in <sys/mount.h> */
585 if ((hostpath = strchr(vol->v_gvs,'@')) != NULL ) {
586 /* convert 'path@hostname' to 'hostname:path',
587 * call getnfsquota(),
588 * convert 'hostname:path' back to 'path@hostname' */
590 sprintf(pathstring,"%s:%s",hostpath+1,vol->v_gvs);
591 strcpy(vol->v_gvs,pathstring);
593 result = getnfsquota(vol, uuid, bsize, dq);
595 hostpath = strchr(vol->v_gvs,':');
597 sprintf(pathstring,"%s@%s",hostpath+1,vol->v_gvs);
598 strcpy(vol->v_gvs,pathstring);
603 /* vol->v_gvs is of the form 'hostname:path' */
604 return getnfsquota(vol, uuid, bsize, dq);
606 /* local filesystem */
607 return getfsquota(vol, uuid, dq);
610 return vol->v_nfs ? getnfsquota(vol, uuid, bsize, dq) :
611 getfsquota(vol, uuid, dq);
615 static int overquota( struct dqblk *dqblk)
619 if ( dqblk->dqb_curblocks > dqblk->dqb_bhardlimit &&
620 dqblk->dqb_bhardlimit != 0 ) {
624 if ( dqblk->dqb_curblocks < dqblk->dqb_bsoftlimit ||
625 dqblk->dqb_bsoftlimit == 0 ) {
629 if ( dqblk->dqb_bwarn ) {
633 if ( gettimeofday( &tv, NULL ) < 0 ) {
634 LOG(log_error, logtype_afpd, "overquota: gettimeofday: %s", strerror(errno) );
635 return( AFPERR_PARAM );
637 if ( dqblk->dqb_btimelimit && dqblk->dqb_btimelimit > tv.tv_sec ) {
645 * This next bit is basically for linux -- everything is fine
646 * if you use 1k blocks... but if you try (for example) to mount
647 * a volume via nfs from a netapp (which might use 4k blocks) everything
648 * gets reported improperly. I have no idea about dbtob on other
652 #ifdef HAVE_BROKEN_DBTOB
654 #define dbtob(a, b) ((VolSpace)((VolSpace)(a) * (VolSpace)(b)))
655 #define HAVE_2ARG_DBTOB
659 #define dbtob(a) ((a) << 10)
662 /* i do the cast to VolSpace here to make sure that 64-bit shifts
664 #ifdef HAVE_2ARG_DBTOB
665 #define tobytes(a, b) dbtob((VolSpace) (a), (VolSpace) (b))
667 #define tobytes(a, b) dbtob((VolSpace) (a))
670 int uquota_getvolspace( struct vol *vol, VolSpace *bfree, VolSpace *btotal, const u_int32_t bsize)
672 u_int64_t this_bsize;
677 if (getquota( vol, &dqblk, bsize) != 0 ) {
678 return( AFPERR_PARAM );
682 this_bsize = dqblk.bsize;
686 LOG(log_debug, logtype_afpd, "after calling getquota in uquota_getvolspace!" );
687 LOG(log_debug, logtype_afpd, "dqb_ihardlimit: %u", dqblk.dqb_ihardlimit );
688 LOG(log_debug, logtype_afpd, "dqb_isoftlimit: %u", dqblk.dqb_isoftlimit );
689 LOG(log_debug, logtype_afpd, "dqb_curinodes : %u", dqblk.dqb_curinodes );
690 LOG(log_debug, logtype_afpd, "dqb_bhardlimit: %u", dqblk.dqb_bhardlimit );
691 LOG(log_debug, logtype_afpd, "dqb_bsoftlimit: %u", dqblk.dqb_bsoftlimit );
692 LOG(log_debug, logtype_afpd, "dqb_curblocks : %u", dqblk.dqb_curblocks );
693 LOG(log_debug, logtype_afpd, "dqb_btime : %u", dqblk.dqb_btime );
694 LOG(log_debug, logtype_afpd, "dqb_itime : %u", dqblk.dqb_itime );
695 LOG(log_debug, logtype_afpd, "bsize/this_bsize : %u/%u", bsize, this_bsize );
696 LOG(log_debug, logtype_afpd, "dqblk.dqb_bhardlimit size: %u", tobytes( dqblk.dqb_bhardlimit, this_bsize ));
697 LOG(log_debug, logtype_afpd, "dqblk.dqb_bsoftlimit size: %u", tobytes( dqblk.dqb_bsoftlimit, this_bsize ));
698 LOG(log_debug, logtype_afpd, "dqblk.dqb_curblocks size: %u", tobytes( dqblk.dqb_curblocks, this_bsize ));
699 #endif /* DEBUG_QUOTA */
701 /* no limit set for this user. it might be set in the future. */
702 if (dqblk.dqb_bsoftlimit == 0 && dqblk.dqb_bhardlimit == 0) {
703 *btotal = *bfree = ~((VolSpace) 0);
704 } else if ( overquota( &dqblk )) {
705 if ( tobytes( dqblk.dqb_curblocks, this_bsize ) > tobytes( dqblk.dqb_bsoftlimit, this_bsize ) ) {
706 *btotal = tobytes( dqblk.dqb_curblocks, this_bsize );
710 *btotal = tobytes( dqblk.dqb_bsoftlimit, this_bsize );
711 *bfree = tobytes( dqblk.dqb_bsoftlimit, this_bsize ) -
712 tobytes( dqblk.dqb_curblocks, this_bsize );
715 *btotal = tobytes( dqblk.dqb_bhardlimit, this_bsize );
716 *bfree = tobytes( dqblk.dqb_bhardlimit, this_bsize ) -
717 tobytes( dqblk.dqb_curblocks, this_bsize );
721 LOG(log_debug, logtype_afpd, "bfree : %u", *bfree );
722 LOG(log_debug, logtype_afpd, "btotal : %u", *btotal );
723 LOG(log_debug, logtype_afpd, "bfree : %uKB", *bfree/1024 );
724 LOG(log_debug, logtype_afpd, "btotal : %uKB", *btotal/1024 );