2 * $Id: quota.c,v 1.32 2009-10-14 02:24:05 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(int what, char *path, uid_t euser_id, struct dqblk *dqb)
196 #ifdef HAVE_LINUX_XQM_H
197 struct fs_disk_quota D;
199 memset (&D, 0, sizeof(D));
201 if ((ret = quotactl(QCMD(Q_XGETQUOTA,(what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t)&D)))
204 dqb->bsize = (u_int64_t)512;
205 dqb->dqb_bsoftlimit = (u_int64_t)D.d_blk_softlimit;
206 dqb->dqb_bhardlimit = (u_int64_t)D.d_blk_hardlimit;
207 dqb->dqb_ihardlimit = (u_int64_t)D.d_ino_hardlimit;
208 dqb->dqb_isoftlimit = (u_int64_t)D.d_ino_softlimit;
209 dqb->dqb_curinodes = (u_int64_t)D.d_icount;
210 dqb->dqb_curblocks = (u_int64_t)D.d_bcount;
216 ** Wrapper for the quotactl(GETQUOTA) call.
217 ** For API v2 the results are copied back into a v1 structure.
218 ** Taken from quota-1.4.8 perl module
220 static int get_linux_fs_quota(int what, char *path, uid_t euser_id, struct dqblk *dqb)
224 if (kernel_iface == IFACE_UNSET)
225 linuxquota_get_api();
227 if (kernel_iface == IFACE_GENERIC)
229 struct dqblk_v3 dqb3;
231 ret = quotactl(QCMD(Q_V3_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb3);
234 dqb->dqb_bhardlimit = dqb3.dqb_bhardlimit;
235 dqb->dqb_bsoftlimit = dqb3.dqb_bsoftlimit;
236 dqb->dqb_curblocks = dqb3.dqb_curspace / DEV_QBSIZE;
237 dqb->dqb_ihardlimit = dqb3.dqb_ihardlimit;
238 dqb->dqb_isoftlimit = dqb3.dqb_isoftlimit;
239 dqb->dqb_curinodes = dqb3.dqb_curinodes;
240 dqb->dqb_btime = dqb3.dqb_btime;
241 dqb->dqb_itime = dqb3.dqb_itime;
242 dqb->bsize = DEV_QBSIZE;
245 else if (kernel_iface == IFACE_VFSV0)
247 struct dqblk_v2 dqb2;
249 ret = quotactl(QCMD(Q_V2_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb2);
252 dqb->dqb_bhardlimit = dqb2.dqb_bhardlimit;
253 dqb->dqb_bsoftlimit = dqb2.dqb_bsoftlimit;
254 dqb->dqb_curblocks = dqb2.dqb_curspace / DEV_QBSIZE;
255 dqb->dqb_ihardlimit = dqb2.dqb_ihardlimit;
256 dqb->dqb_isoftlimit = dqb2.dqb_isoftlimit;
257 dqb->dqb_curinodes = dqb2.dqb_curinodes;
258 dqb->dqb_btime = dqb2.dqb_btime;
259 dqb->dqb_itime = dqb2.dqb_itime;
260 dqb->bsize = DEV_QBSIZE;
263 else /* if (kernel_iface == IFACE_VFSOLD) */
265 struct dqblk_v1 dqb1;
267 ret = quotactl(QCMD(Q_V1_GETQUOTA, (what ? GRPQUOTA : USRQUOTA)), path, euser_id, (caddr_t) &dqb1);
270 dqb->dqb_bhardlimit = dqb1.dqb_bhardlimit;
271 dqb->dqb_bsoftlimit = dqb1.dqb_bsoftlimit;
272 dqb->dqb_curblocks = dqb1.dqb_curblocks;
273 dqb->dqb_ihardlimit = dqb1.dqb_ihardlimit;
274 dqb->dqb_isoftlimit = dqb1.dqb_isoftlimit;
275 dqb->dqb_curinodes = dqb1.dqb_curinodes;
276 dqb->dqb_btime = dqb1.dqb_btime;
277 dqb->dqb_itime = dqb1.dqb_itime;
278 dqb->bsize = DEV_QBSIZE;
286 #if defined(HAVE_SYS_MNTTAB_H) || defined(__svr4__)
288 * Return the mount point associated with the filesystem
289 * on which "file" resides. Returns NULL on failure.
292 mountp( char *file, int *nfs)
297 static struct mnttab mnt;
299 if ( stat( file, &sb ) < 0 ) {
304 if (( mtab = fopen( "/etc/mnttab", "r" )) == NULL ) {
308 while ( getmntent( mtab, &mnt ) == 0 ) {
310 if ( (stat( mnt.mnt_special, &sb ) == 0) && (devno == sb.st_rdev)) {
312 return mnt.mnt_mountp;
315 /* check for nfs. we probably should use
316 * strcmp(mnt.mnt_fstype, MNTTYPE_NFS), but that's not as fast. */
317 if ((stat(mnt.mnt_mountp, &sb) == 0) && (devno == sb.st_dev) &&
318 strchr(mnt.mnt_special, ':')) {
321 return mnt.mnt_special;
332 * Return the block-special device name associated with the filesystem
333 * on which "file" resides. Returns NULL on failure.
337 special( char *file, int *nfs)
339 static struct fs_data fsd;
341 if ( getmnt(0, &fsd, 0, STAT_ONE, file ) < 0 ) {
342 LOG(log_info, logtype_afpd, "special: getmnt %s: %s", file, strerror(errno) );
346 /* XXX: does this really detect an nfs mounted fs? */
347 if (strchr(fsd.fd_req.devname, ':'))
349 return( fsd.fd_req.devname );
353 #if (defined(HAVE_SYS_MOUNT_H) && !defined(__linux__)) || defined(BSD4_4) || defined(_IBMR2)
356 special(char *file, int *nfs)
358 static struct statfs sfs;
360 if ( statfs( file, &sfs ) < 0 ) {
365 /* Digital UNIX: The struct sfs contains a field sfs.f_type,
366 * the MOUNT_* constants are defined in <sys/mount.h> */
367 if ((sfs.f_type == MOUNT_NFS)||(sfs.f_type == MOUNT_NFS3))
369 /* XXX: make sure this really detects an nfs mounted fs */
370 if (strchr(sfs.f_mntfromname, ':'))
373 return( sfs.f_mntfromname );
379 special(char *file, int *nfs)
387 if ( stat( file, &sb ) < 0 ) {
392 if (( mtab = setmntent( "/etc/mtab", "r" )) == NULL ) {
396 while (( mnt = getmntent( mtab )) != NULL ) {
397 /* check for local fs */
398 if ( (stat( mnt->mnt_fsname, &sb ) == 0) && devno == sb.st_rdev) {
403 /* check for an nfs mount entry. the alternative is to use
404 * strcmp(mnt->mnt_type, MNTTYPE_NFS) instead of the strchr. */
405 if ((stat(mnt->mnt_dir, &sb) == 0) && (devno == sb.st_dev) &&
406 strchr(mnt->mnt_fsname, ':')) {
418 if (strcmp(mnt->mnt_type, "xfs") == 0)
422 return( mnt->mnt_fsname );
427 #endif /* __svr4__ */
430 static int getfsquota(struct vol *vol, const int uid, struct dqblk *dq)
439 memset(&dqg, 0, sizeof(dqg));
444 qc.addr = (caddr_t)dq;
445 if ( ioctl( vol->v_qfd, Q_QUOTACTL, &qc ) < 0 ) {
446 return( AFPERR_PARAM );
451 if ( quota( Q_GETDLIM, uid, vol->v_gvs, dq ) != 0 ) {
452 return( AFPERR_PARAM );
461 #define QCMD(a,b) (a)
465 /* for group quotas. we only use these if the user belongs
470 if ( seteuid( getuid() ) == 0 ) {
471 if ( quotactl( vol->v_path, QCMD(Q_GETQUOTA,USRQUOTA),
472 uid, (char *)dq ) != 0 ) {
473 /* try group quotas */
475 if ( quotactl(vol->v_path, QCMD(Q_GETQUOTA, GRPQUOTA),
476 groups[0], (char *) &dqg) != 0 ) {
478 return( AFPERR_PARAM );
486 if ( seteuid( getuid() ) == 0 ) {
487 if ( quotactl( vol->v_path, QCMD(Q_GETQUOTA, USRQUOTA),
488 uid, (char *)dq ) != 0 ) {
490 return ( AFPERR_PARAM );
496 if (get_linux_quota (WANT_USER_QUOTA, vol->v_gvs, uid, dq) !=0) {
497 return( AFPERR_PARAM );
500 if (get_linux_quota(WANT_GROUP_QUOTA, vol->v_gvs, getegid(), &dqg) != 0) {
502 LOG(log_debug, logtype_afpd, "group quota did not work!" );
503 #endif /* DEBUG_QUOTA */
505 return AFP_OK; /* no need to check user vs group quota */
511 /* return either the group quota entry or user quota entry,
512 whichever has the least amount of space remaining
515 /* if user space remaining > group space remaining */
517 /* if overquota, free space is 0 otherwise hard-current */
518 ( overquota( dq ) ? 0 : ( dq->dqb_bhardlimit ? dq->dqb_bhardlimit -
519 dq->dqb_curblocks : ~((u_int64_t) 0) ) )
523 ( overquota( &dqg ) ? 0 : ( dqg.dqb_bhardlimit ? dqg.dqb_bhardlimit -
524 dqg.dqb_curblocks : ~((u_int64_t) 0) ) )
528 /* use group quota limits rather than user limits */
529 dq->dqb_curblocks = dqg.dqb_curblocks;
530 dq->dqb_bhardlimit = dqg.dqb_bhardlimit;
531 dq->dqb_bsoftlimit = dqg.dqb_bsoftlimit;
532 dq->dqb_btimelimit = dqg.dqb_btimelimit;
538 #endif /* __svr4__ */
544 static int getquota( struct vol *vol, struct dqblk *dq, const u_int32_t bsize)
549 char buf[ MAXPATHLEN + 1];
551 if ( vol->v_qfd == -1 && vol->v_gvs == NULL) {
552 if (( p = mountp( vol->v_path, &vol->v_nfs)) == NULL ) {
553 LOG(log_info, logtype_afpd, "getquota: mountp %s fails", vol->v_path );
554 return( AFPERR_PARAM );
558 if (( vol->v_gvs = (char *)malloc( strlen( p ) + 1 )) == NULL ) {
559 LOG(log_error, logtype_afpd, "getquota: malloc: %s", strerror(errno) );
562 strcpy( vol->v_gvs, p );
565 sprintf( buf, "%s/quotas", p );
566 if (( vol->v_qfd = open( buf, O_RDONLY, 0 )) < 0 ) {
567 LOG(log_info, logtype_afpd, "open %s: %s", buf, strerror(errno) );
568 return( AFPERR_PARAM );
574 if ( vol->v_gvs == NULL ) {
575 if (( p = special( vol->v_path, &vol->v_nfs )) == NULL ) {
576 LOG(log_info, logtype_afpd, "getquota: special %s fails", vol->v_path );
577 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 );
589 /* Digital UNIX: Two forms of specifying an NFS filesystem are possible,
590 either 'hostname:path' or 'path@hostname' (Ultrix heritage) */
593 char pathstring[MNAMELEN];
594 /* MNAMELEN ist defined in <sys/mount.h> */
597 if ((hostpath = strchr(vol->v_gvs,'@')) != NULL ) {
598 /* convert 'path@hostname' to 'hostname:path',
599 * call getnfsquota(),
600 * convert 'hostname:path' back to 'path@hostname' */
602 sprintf(pathstring,"%s:%s",hostpath+1,vol->v_gvs);
603 strcpy(vol->v_gvs,pathstring);
605 result = getnfsquota(vol, uuid, bsize, dq);
607 hostpath = strchr(vol->v_gvs,':');
609 sprintf(pathstring,"%s@%s",hostpath+1,vol->v_gvs);
610 strcpy(vol->v_gvs,pathstring);
615 /* vol->v_gvs is of the form 'hostname:path' */
616 return getnfsquota(vol, uuid, bsize, dq);
618 /* local filesystem */
619 return getfsquota(vol, uuid, dq);
622 return vol->v_nfs ? getnfsquota(vol, uuid, bsize, dq) :
623 getfsquota(vol, uuid, dq);
627 static int overquota( struct dqblk *dqblk)
631 if ( dqblk->dqb_curblocks > dqblk->dqb_bhardlimit &&
632 dqblk->dqb_bhardlimit != 0 ) {
636 if ( dqblk->dqb_curblocks < dqblk->dqb_bsoftlimit ||
637 dqblk->dqb_bsoftlimit == 0 ) {
641 if ( dqblk->dqb_bwarn ) {
645 if ( gettimeofday( &tv, NULL ) < 0 ) {
646 LOG(log_error, logtype_afpd, "overquota: gettimeofday: %s", strerror(errno) );
647 return( AFPERR_PARAM );
649 if ( dqblk->dqb_btimelimit && dqblk->dqb_btimelimit > tv.tv_sec ) {
657 * This next bit is basically for linux -- everything is fine
658 * if you use 1k blocks... but if you try (for example) to mount
659 * a volume via nfs from a netapp (which might use 4k blocks) everything
660 * gets reported improperly. I have no idea about dbtob on other
664 #ifdef HAVE_BROKEN_DBTOB
666 #define dbtob(a, b) ((VolSpace)((VolSpace)(a) * (VolSpace)(b)))
667 #define HAVE_2ARG_DBTOB
671 #define dbtob(a) ((a) << 10)
674 /* i do the cast to VolSpace here to make sure that 64-bit shifts
676 #ifdef HAVE_2ARG_DBTOB
677 #define tobytes(a, b) dbtob((VolSpace) (a), (VolSpace) (b))
679 #define tobytes(a, b) dbtob((VolSpace) (a))
682 int uquota_getvolspace( struct vol *vol, VolSpace *bfree, VolSpace *btotal, const u_int32_t bsize)
684 u_int64_t this_bsize;
689 if (getquota( vol, &dqblk, bsize) != 0 ) {
690 return( AFPERR_PARAM );
694 this_bsize = dqblk.bsize;
698 LOG(log_info, logtype_afpd, "after calling getquota in uquota_getvolspace!" );
699 LOG(log_info, logtype_afpd, "dqb_ihardlimit: %u", dqblk.dqb_ihardlimit );
700 LOG(log_info, logtype_afpd, "dqb_isoftlimit: %u", dqblk.dqb_isoftlimit );
701 LOG(log_info, logtype_afpd, "dqb_curinodes : %u", dqblk.dqb_curinodes );
702 LOG(log_info, logtype_afpd, "dqb_bhardlimit: %u", dqblk.dqb_bhardlimit );
703 LOG(log_info, logtype_afpd, "dqb_bsoftlimit: %u", dqblk.dqb_bsoftlimit );
704 LOG(log_info, logtype_afpd, "dqb_curblocks : %u", dqblk.dqb_curblocks );
705 LOG(log_info, logtype_afpd, "dqb_btime : %u", dqblk.dqb_btime );
706 LOG(log_info, logtype_afpd, "dqb_itime : %u", dqblk.dqb_itime );
707 LOG(log_info, logtype_afpd, "bsize/this_bsize : %u/%u", bsize, this_bsize );
708 LOG(log_info, logtype_afpd, "dqblk.dqb_bhardlimit size: %u", tobytes( dqblk.dqb_bhardlimit, this_bsize ));
709 LOG(log_info, logtype_afpd, "dqblk.dqb_bsoftlimit size: %u", tobytes( dqblk.dqb_bsoftlimit, this_bsize ));
710 LOG(log_info, logtype_afpd, "dqblk.dqb_curblocks size: %u", tobytes( dqblk.dqb_curblocks, this_bsize ));
711 #endif /* DEBUG_QUOTA */
713 /* no limit set for this user. it might be set in the future. */
714 if (dqblk.dqb_bsoftlimit == 0 && dqblk.dqb_bhardlimit == 0) {
715 *btotal = *bfree = ~((VolSpace) 0);
716 } else if ( overquota( &dqblk )) {
717 if ( tobytes( dqblk.dqb_curblocks, this_bsize ) > tobytes( dqblk.dqb_bsoftlimit, this_bsize ) ) {
718 *btotal = tobytes( dqblk.dqb_curblocks, this_bsize );
722 *btotal = tobytes( dqblk.dqb_bsoftlimit, this_bsize );
723 *bfree = tobytes( dqblk.dqb_bsoftlimit, this_bsize ) -
724 tobytes( dqblk.dqb_curblocks, this_bsize );
727 *btotal = tobytes( dqblk.dqb_bhardlimit, this_bsize );
728 *bfree = tobytes( dqblk.dqb_bhardlimit, this_bsize ) -
729 tobytes( dqblk.dqb_curblocks, this_bsize );
733 LOG(log_info, logtype_afpd, "bfree : %u", *bfree );
734 LOG(log_info, logtype_afpd, "btotal : %u", *btotal );
735 LOG(log_info, logtype_afpd, "bfree : %uKB", *bfree/1024 );
736 LOG(log_info, logtype_afpd, "btotal : %uKB", *btotal/1024 );