source/lib/sysquotas.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    System QUOTA function wrappers
   4    Copyright (C) Stefan (metze) Metzmacher      2003
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20
  21 #include "includes.h"
  22
  23 #undef DBGC_CLASS
  24 #define DBGC_CLASS DBGC_QUOTA
  25
  26 #ifdef HAVE_SYS_QUOTAS
  27
  28 #if defined(HAVE_QUOTACTL_4A)
  29
  30 /*#endif HAVE_QUOTACTL_4A */
  31 #elif defined(HAVE_QUOTACTL_4B)
  32
  33 #error HAVE_QUOTACTL_4B not implemeted
  34
  35 /*#endif HAVE_QUOTACTL_4B */
  36 #elif defined(HAVE_QUOTACTL_3)
  37
  38 #error HAVE_QUOTACTL_3 not implemented
  39
  40 /* #endif  HAVE_QUOTACTL_3 */
  41 #else /* NO_QUOTACTL_USED */
  42
  43 #endif /* NO_QUOTACTL_USED */
  44
  45 #ifdef HAVE_MNTENT
  46 static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
  47 {
  48         int ret = -1;
  49         SMB_STRUCT_STAT S;
  50         FILE *fp;
  51         struct mntent *mnt;
  52         SMB_DEV_T devno;
  53
  54         /* find the block device file */
  55
  56         if (!path||!mntpath||!bdev||!fs)
  57                 smb_panic("sys_path_to_bdev: called with NULL pointer");
  58
  59         (*mntpath) = NULL;
  60         (*bdev) = NULL;
  61         (*fs) = NULL;
  62
  63         if ( sys_stat(path, &S) == -1 )
  64                 return (-1);
  65
  66         devno = S.st_dev ;
  67
  68         fp = setmntent(MOUNTED,"r");
  69         if (fp == NULL) {
  70                 return -1;
  71         }
  72
  73         while ((mnt = getmntent(fp))) {
  74                 if ( sys_stat(mnt->mnt_dir,&S) == -1 )
  75                         continue ;
  76
  77                 if (S.st_dev == devno) {
  78                         (*mntpath) = SMB_STRDUP(mnt->mnt_dir);
  79                         (*bdev) = SMB_STRDUP(mnt->mnt_fsname);
  80                         (*fs)   = SMB_STRDUP(mnt->mnt_type);
  81                         if ((*mntpath)&&(*bdev)&&(*fs)) {
  82                                 ret = 0;
  83                         } else {
  84                                 SAFE_FREE(*mntpath);
  85                                 SAFE_FREE(*bdev);
  86                                 SAFE_FREE(*fs);
  87                                 ret = -1;
  88                         }
  89
  90                         break;
  91                 }
  92         }
  93
  94         endmntent(fp) ;
  95
  96         return ret;
  97 }
  98 /* #endif HAVE_MNTENT */
  99 #elif defined(HAVE_DEVNM)
 100
 101 /* we have this on HPUX, ... */
 102 static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
 103 {
 104         int ret = -1;
 105         char dev_disk[256];
 106         SMB_STRUCT_STAT S;
 107
 108         if (!path||!mntpath||!bdev||!fs)
 109                 smb_panic("sys_path_to_bdev: called with NULL pointer");
 110
 111         (*mntpath) = NULL;
 112         (*bdev) = NULL;
 113         (*fs) = NULL;
 114
 115         /* find the block device file */
 116
 117         if ((ret=sys_stat(path, &S))!=0) {
 118                 return ret;
 119         }
 120
 121         if ((ret=devnm(S_IFBLK, S.st_dev, dev_disk, 256, 1))!=0) {
 122                 return ret;
 123         }
 124
 125         /* we should get the mntpath right...
 126          * but I don't know how
 127          * --metze
 128          */
 129         (*mntpath) = SMB_STRDUP(path);
 130         (*bdev) = SMB_STRDUP(dev_disk);
 131         if ((*mntpath)&&(*bdev)) {
 132                 ret = 0;
 133         } else {
 134                 SAFE_FREE(*mntpath);
 135                 SAFE_FREE(*bdev);
 136                 ret = -1;
 137         }
 138
 139
 140         return ret;
 141 }
 142
 143 /* #endif HAVE_DEVNM */
 144 #else
 145 /* we should fake this up...*/
 146 static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
 147 {
 148         int ret = -1;
 149
 150         if (!path||!mntpath||!bdev||!fs)
 151                 smb_panic("sys_path_to_bdev: called with NULL pointer");
 152
 153         (*mntpath) = NULL;
 154         (*bdev) = NULL;
 155         (*fs) = NULL;
 156
 157         (*mntpath) = SMB_STRDUP(path);
 158         if (*mntpath) {
 159                 ret = 0;
 160         } else {
 161                 SAFE_FREE(*mntpath);
 162                 ret = -1;
 163         }
 164
 165         return ret;
 166 }
 167 #endif
 168
 169 /*********************************************************************
 170  Now the list of all filesystem specific quota systems we have found
 171 **********************************************************************/
 172 static struct {
 173         const char *name;
 174         int (*get_quota)(const char *path, const char *bdev, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp);
 175         int (*set_quota)(const char *path, const char *bdev, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp);
 176 } sys_quota_backends[] = {
 177 #ifdef HAVE_XFS_QUOTAS
 178         {"xfs", sys_get_xfs_quota,      sys_set_xfs_quota},
 179 #endif /* HAVE_XFS_QUOTAS */
 180         {NULL,  NULL,                   NULL}
 181 };
 182
 183 static int command_get_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 184 {
 185         const char *get_quota_command;
 186         char **lines = NULL;
 187
 188         get_quota_command = lp_get_quota_command();
 189         if (get_quota_command && *get_quota_command) {
 190                 const char *p;
 191                 char *p2;
 192                 pstring syscmd;
 193                 int _id = -1;
 194
 195                 switch(qtype) {
 196                         case SMB_USER_QUOTA_TYPE:
 197                         case SMB_USER_FS_QUOTA_TYPE:
 198                                 _id = id.uid;
 199                                 break;
 200                         case SMB_GROUP_QUOTA_TYPE:
 201                         case SMB_GROUP_FS_QUOTA_TYPE:
 202                                 _id = id.gid;
 203                                 break;
 204                         default:
 205                                 DEBUG(0,("invalid quota type.\n"));
 206                                 return -1;
 207                 }
 208
 209                 slprintf(syscmd, sizeof(syscmd)-1,
 210                         "%s \"%s\" %d %d",
 211                         get_quota_command, path, qtype, _id);
 212
 213                 DEBUG (3, ("get_quota: Running command %s\n", syscmd));
 214
 215                 lines = file_lines_pload(syscmd, NULL);
 216                 if (lines) {
 217                         char *line = lines[0];
 218
 219                         DEBUG (3, ("Read output from get_quota, \"%s\"\n", line));
 220
 221                         /* we need to deal with long long unsigned here, if supported */
 222
 223                         dp->qflags = (enum SMB_QUOTA_TYPE)strtoul(line, &p2, 10);
 224                         p = p2;
 225                         while (p && *p && isspace(*p)) {
 226                                 p++;
 227                         }
 228
 229                         if (p && *p) {
 230                                 dp->curblocks = STR_TO_SMB_BIG_UINT(p, &p);
 231                         } else {
 232                                 goto invalid_param;
 233                         }
 234
 235                         while (p && *p && isspace(*p)) {
 236                                 p++;
 237                         }
 238
 239                         if (p && *p) {
 240                                 dp->softlimit = STR_TO_SMB_BIG_UINT(p, &p);
 241                         } else {
 242                                 goto invalid_param;
 243                         }
 244
 245                         while (p && *p && isspace(*p)) {
 246                                 p++;
 247                         }
 248
 249                         if (p && *p) {
 250                                 dp->hardlimit = STR_TO_SMB_BIG_UINT(p, &p);
 251                         } else {
 252                                 goto invalid_param;
 253                         }
 254
 255                         while (p && *p && isspace(*p)) {
 256                                 p++;
 257                         }
 258
 259                         if (p && *p) {
 260                                 dp->curinodes = STR_TO_SMB_BIG_UINT(p, &p);
 261                         } else {
 262                                 goto invalid_param;
 263                         }
 264
 265                         while (p && *p && isspace(*p)) {
 266                                 p++;
 267                         }
 268
 269                         if (p && *p) {
 270                                 dp->isoftlimit = STR_TO_SMB_BIG_UINT(p, &p);
 271                         } else {
 272                                 goto invalid_param;
 273                         }
 274
 275                         while (p && *p && isspace(*p)) {
 276                                 p++;
 277                         }
 278
 279                         if (p && *p) {
 280                                 dp->ihardlimit = STR_TO_SMB_BIG_UINT(p, &p);
 281                         } else {
 282                                 goto invalid_param;
 283                         }
 284
 285                         while (p && *p && isspace(*p)) {
 286                                 p++;
 287                         }
 288
 289                         if (p && *p) {
 290                                 dp->bsize = STR_TO_SMB_BIG_UINT(p, NULL);
 291                         } else {
 292                                 dp->bsize = 1024;
 293                         }
 294
 295                         file_lines_free(lines);
 296                         lines = NULL;
 297
 298                         DEBUG (3, ("Parsed output of get_quota, ...\n"));
 299
 300 #ifdef LARGE_SMB_OFF_T
 301                         DEBUGADD (5,(
 302                                 "qflags:%u curblocks:%llu softlimit:%llu hardlimit:%llu\n"
 303                                 "curinodes:%llu isoftlimit:%llu ihardlimit:%llu bsize:%llu\n",
 304                                 dp->qflags,(long long unsigned)dp->curblocks,
 305                                 (long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
 306                                 (long long unsigned)dp->curinodes,
 307                                 (long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
 308                                 (long long unsigned)dp->bsize));
 309 #else /* LARGE_SMB_OFF_T */
 310                         DEBUGADD (5,(
 311                                 "qflags:%u curblocks:%lu softlimit:%lu hardlimit:%lu\n"
 312                                 "curinodes:%lu isoftlimit:%lu ihardlimit:%lu bsize:%lu\n",
 313                                 dp->qflags,(long unsigned)dp->curblocks,
 314                                 (long unsigned)dp->softlimit,(long unsigned)dp->hardlimit,
 315                                 (long unsigned)dp->curinodes,
 316                                 (long unsigned)dp->isoftlimit,(long unsigned)dp->ihardlimit,
 317                                 (long unsigned)dp->bsize));
 318 #endif /* LARGE_SMB_OFF_T */
 319                         return 0;
 320                 }
 321
 322                 DEBUG (0, ("get_quota_command failed!\n"));
 323                 return -1;
 324         }
 325
 326         errno = ENOSYS;
 327         return -1;
 328
 329 invalid_param:
 330
 331         file_lines_free(lines);
 332         DEBUG(0,("The output of get_quota_command is invalid!\n"));
 333         return -1;
 334 }
 335
 336 static int command_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 337 {
 338         const char *set_quota_command;
 339
 340         set_quota_command = lp_set_quota_command();
 341         if (set_quota_command && *set_quota_command) {
 342                 char **lines;
 343                 pstring syscmd;
 344                 int _id = -1;
 345
 346                 switch(qtype) {
 347                         case SMB_USER_QUOTA_TYPE:
 348                         case SMB_USER_FS_QUOTA_TYPE:
 349                                 _id = id.uid;
 350                                 break;
 351                         case SMB_GROUP_QUOTA_TYPE:
 352                         case SMB_GROUP_FS_QUOTA_TYPE:
 353                                 _id = id.gid;
 354                                 break;
 355                         default:
 356                                 return -1;
 357                 }
 358
 359 #ifdef LARGE_SMB_OFF_T
 360                 slprintf(syscmd, sizeof(syscmd)-1,
 361                         "%s \"%s\" %d %d "
 362                         "%u %llu %llu "
 363                         "%llu %llu %llu ",
 364                         set_quota_command, path, qtype, _id, dp->qflags,
 365                         (long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
 366                         (long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
 367                         (long long unsigned)dp->bsize);
 368 #else /* LARGE_SMB_OFF_T */
 369                 slprintf(syscmd, sizeof(syscmd)-1,
 370                         "%s \"%s\" %d %d "
 371                         "%u %lu %lu "
 372                         "%lu %lu %lu ",
 373                         set_quota_command, path, qtype, _id, dp->qflags,
 374                         (long unsigned)dp->softlimit,(long unsigned)dp->hardlimit,
 375                         (long unsigned)dp->isoftlimit,(long unsigned)dp->ihardlimit,
 376                         (long unsigned)dp->bsize);
 377 #endif /* LARGE_SMB_OFF_T */
 378
 379
 380
 381                 DEBUG (3, ("get_quota: Running command %s\n", syscmd));
 382
 383                 lines = file_lines_pload(syscmd, NULL);
 384                 if (lines) {
 385                         char *line = lines[0];
 386
 387                         DEBUG (3, ("Read output from set_quota, \"%s\"\n", line));
 388
 389                         file_lines_free(lines);
 390
 391                         return 0;
 392                 }
 393                 DEBUG (0, ("set_quota_command failed!\n"));
 394                 return -1;
 395         }
 396
 397         errno = ENOSYS;
 398         return -1;
 399 }
 400
 401 int sys_get_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 402 {
 403         int ret = -1;
 404         int i;
 405         BOOL ready = False;
 406         char *mntpath = NULL;
 407         char *bdev = NULL;
 408         char *fs = NULL;
 409
 410         if (!path||!dp)
 411                 smb_panic("sys_get_quota: called with NULL pointer");
 412
 413         if (command_get_quota(path, qtype, id, dp)==0) {
 414                 return 0;
 415         } else if (errno != ENOSYS) {
 416                 return -1;
 417         }
 418
 419         if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
 420                 DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
 421                 return ret;
 422         }
 423
 424         errno = 0;
 425         DEBUG(10,("sys_get_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
 426
 427         for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].get_quota);i++) {
 428                 if (strcmp(fs,sys_quota_backends[i].name)==0) {
 429                         ret = sys_quota_backends[i].get_quota(mntpath, bdev, qtype, id, dp);
 430                         if (ret!=0) {
 431                                 DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 432                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 433                         } else {
 434                                 DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 435                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 436                         }
 437                         ready = True;
 438                         break;
 439                 }
 440         }
 441
 442         if (!ready) {
 443                 /* use the default vfs quota functions */
 444                 ret=sys_get_vfs_quota(mntpath, bdev, qtype, id, dp);
 445                 if (ret!=0) {
 446                         DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s\n",
 447                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 448                 } else {
 449                         DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 450                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 451                 }
 452         }
 453
 454         SAFE_FREE(mntpath);
 455         SAFE_FREE(bdev);
 456         SAFE_FREE(fs);
 457
 458         if ((ret!=0)&& (errno == EDQUOT)) {
 459                 DEBUG(10,("sys_get_quota() warning over quota!\n"));
 460                 return 0;
 461         }
 462
 463         return ret;
 464 }
 465
 466 int sys_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 467 {
 468         int ret = -1;
 469         int i;
 470         BOOL ready = False;
 471         char *mntpath = NULL;
 472         char *bdev = NULL;
 473         char *fs = NULL;
 474
 475         /* find the block device file */
 476
 477         if (!path||!dp)
 478                 smb_panic("get_smb_quota: called with NULL pointer");
 479
 480         if (command_set_quota(path, qtype, id, dp)==0) {
 481                 return 0;
 482         } else if (errno != ENOSYS) {
 483                 return -1;
 484         }
 485
 486         if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
 487                 DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
 488                 return ret;
 489         }
 490
 491         errno = 0;
 492         DEBUG(10,("sys_set_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
 493
 494         for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].set_quota);i++) {
 495                 if (strcmp(fs,sys_quota_backends[i].name)==0) {
 496                         ret = sys_quota_backends[i].set_quota(mntpath, bdev, qtype, id, dp);
 497                         if (ret!=0) {
 498                                 DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 499                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 500                         } else {
 501                                 DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 502                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 503                         }
 504                         ready = True;
 505                         break;
 506                 }
 507         }
 508
 509         if (!ready) {
 510                 /* use the default vfs quota functions */
 511                 ret=sys_set_vfs_quota(mntpath, bdev, qtype, id, dp);
 512                 if (ret!=0) {
 513                         DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 514                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 515                 } else {
 516                         DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 517                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 518                 }
 519         }
 520
 521         SAFE_FREE(mntpath);
 522         SAFE_FREE(bdev);
 523         SAFE_FREE(fs);
 524
 525         if ((ret!=0)&& (errno == EDQUOT)) {
 526                 DEBUG(10,("sys_set_quota() warning over quota!\n"));
 527                 return 0;
 528         }
 529
 530         return ret;
 531 }
 532
 533 #else /* HAVE_SYS_QUOTAS */
 534  void dummy_sysquotas_c(void);
 535
 536  void dummy_sysquotas_c(void)
 537 {
 538         return;
 539 }
 540 #endif /* HAVE_SYS_QUOTAS */
 541