source3/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, false) == -1 )
  64                 return (-1);
  65
  66         devno = S.st_ex_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, false) == -1 )
  75                         continue ;
  76
  77                 if (S.st_ex_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, false))!=0) {
 118                 return ret;
 119         }
 120
 121         if ((ret=devnm(S_IFBLK, S.st_ex_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         {"gfs", sys_get_xfs_quota,      sys_set_xfs_quota},
 180         {"gfs2", sys_get_xfs_quota,     sys_set_xfs_quota},
 181 #endif /* HAVE_XFS_QUOTAS */
 182         {NULL,  NULL,                   NULL}
 183 };
 184
 185 static int command_get_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 186 {
 187         const char *get_quota_command;
 188         char **lines = NULL;
 189
 190         get_quota_command = lp_get_quota_command();
 191         if (get_quota_command && *get_quota_command) {
 192                 const char *p;
 193                 char *p2;
 194                 char *syscmd = NULL;
 195                 int _id = -1;
 196
 197                 switch(qtype) {
 198                         case SMB_USER_QUOTA_TYPE:
 199                         case SMB_USER_FS_QUOTA_TYPE:
 200                                 _id = id.uid;
 201                                 break;
 202                         case SMB_GROUP_QUOTA_TYPE:
 203                         case SMB_GROUP_FS_QUOTA_TYPE:
 204                                 _id = id.gid;
 205                                 break;
 206                         default:
 207                                 DEBUG(0,("invalid quota type.\n"));
 208                                 return -1;
 209                 }
 210
 211                 if (asprintf(&syscmd, "%s \"%s\" %d %d",
 212                         get_quota_command, path, qtype, _id) < 0) {
 213                         return -1;
 214                 }
 215
 216                 DEBUG (3, ("get_quota: Running command %s\n", syscmd));
 217
 218                 lines = file_lines_pload(syscmd, NULL);
 219                 SAFE_FREE(syscmd);
 220
 221                 if (lines) {
 222                         char *line = lines[0];
 223
 224                         DEBUG (3, ("Read output from get_quota, \"%s\"\n", line));
 225
 226                         /* we need to deal with long long unsigned here, if supported */
 227
 228                         dp->qflags = (enum SMB_QUOTA_TYPE)strtoul(line, &p2, 10);
 229                         p = p2;
 230                         while (p && *p && isspace(*p)) {
 231                                 p++;
 232                         }
 233
 234                         if (p && *p) {
 235                                 dp->curblocks = STR_TO_SMB_BIG_UINT(p, &p);
 236                         } else {
 237                                 goto invalid_param;
 238                         }
 239
 240                         while (p && *p && isspace(*p)) {
 241                                 p++;
 242                         }
 243
 244                         if (p && *p) {
 245                                 dp->softlimit = STR_TO_SMB_BIG_UINT(p, &p);
 246                         } else {
 247                                 goto invalid_param;
 248                         }
 249
 250                         while (p && *p && isspace(*p)) {
 251                                 p++;
 252                         }
 253
 254                         if (p && *p) {
 255                                 dp->hardlimit = STR_TO_SMB_BIG_UINT(p, &p);
 256                         } else {
 257                                 goto invalid_param;
 258                         }
 259
 260                         while (p && *p && isspace(*p)) {
 261                                 p++;
 262                         }
 263
 264                         if (p && *p) {
 265                                 dp->curinodes = STR_TO_SMB_BIG_UINT(p, &p);
 266                         } else {
 267                                 goto invalid_param;
 268                         }
 269
 270                         while (p && *p && isspace(*p)) {
 271                                 p++;
 272                         }
 273
 274                         if (p && *p) {
 275                                 dp->isoftlimit = STR_TO_SMB_BIG_UINT(p, &p);
 276                         } else {
 277                                 goto invalid_param;
 278                         }
 279
 280                         while (p && *p && isspace(*p)) {
 281                                 p++;
 282                         }
 283
 284                         if (p && *p) {
 285                                 dp->ihardlimit = STR_TO_SMB_BIG_UINT(p, &p);
 286                         } else {
 287                                 goto invalid_param;
 288                         }
 289
 290                         while (p && *p && isspace(*p)) {
 291                                 p++;
 292                         }
 293
 294                         if (p && *p) {
 295                                 dp->bsize = STR_TO_SMB_BIG_UINT(p, NULL);
 296                         } else {
 297                                 dp->bsize = 1024;
 298                         }
 299
 300                         TALLOC_FREE(lines);
 301                         lines = NULL;
 302
 303                         DEBUG (3, ("Parsed output of get_quota, ...\n"));
 304
 305 #ifdef LARGE_SMB_OFF_T
 306                         DEBUGADD (5,(
 307                                 "qflags:%u curblocks:%llu softlimit:%llu hardlimit:%llu\n"
 308                                 "curinodes:%llu isoftlimit:%llu ihardlimit:%llu bsize:%llu\n",
 309                                 dp->qflags,(long long unsigned)dp->curblocks,
 310                                 (long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
 311                                 (long long unsigned)dp->curinodes,
 312                                 (long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
 313                                 (long long unsigned)dp->bsize));
 314 #else /* LARGE_SMB_OFF_T */
 315                         DEBUGADD (5,(
 316                                 "qflags:%u curblocks:%lu softlimit:%lu hardlimit:%lu\n"
 317                                 "curinodes:%lu isoftlimit:%lu ihardlimit:%lu bsize:%lu\n",
 318                                 dp->qflags,(long unsigned)dp->curblocks,
 319                                 (long unsigned)dp->softlimit,(long unsigned)dp->hardlimit,
 320                                 (long unsigned)dp->curinodes,
 321                                 (long unsigned)dp->isoftlimit,(long unsigned)dp->ihardlimit,
 322                                 (long unsigned)dp->bsize));
 323 #endif /* LARGE_SMB_OFF_T */
 324                         return 0;
 325                 }
 326
 327                 DEBUG (0, ("get_quota_command failed!\n"));
 328                 return -1;
 329         }
 330
 331         errno = ENOSYS;
 332         return -1;
 333
 334 invalid_param:
 335
 336         TALLOC_FREE(lines);
 337         DEBUG(0,("The output of get_quota_command is invalid!\n"));
 338         return -1;
 339 }
 340
 341 static int command_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 342 {
 343         const char *set_quota_command;
 344
 345         set_quota_command = lp_set_quota_command();
 346         if (set_quota_command && *set_quota_command) {
 347                 char **lines = NULL;
 348                 char *syscmd = NULL;
 349                 int _id = -1;
 350
 351                 switch(qtype) {
 352                         case SMB_USER_QUOTA_TYPE:
 353                         case SMB_USER_FS_QUOTA_TYPE:
 354                                 _id = id.uid;
 355                                 break;
 356                         case SMB_GROUP_QUOTA_TYPE:
 357                         case SMB_GROUP_FS_QUOTA_TYPE:
 358                                 _id = id.gid;
 359                                 break;
 360                         default:
 361                                 return -1;
 362                 }
 363
 364 #ifdef LARGE_SMB_OFF_T
 365                 if (asprintf(&syscmd,
 366                         "%s \"%s\" %d %d "
 367                         "%u %llu %llu "
 368                         "%llu %llu %llu ",
 369                         set_quota_command, path, qtype, _id, dp->qflags,
 370                         (long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
 371                         (long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
 372                         (long long unsigned)dp->bsize) < 0) {
 373                         return -1;
 374                 }
 375 #else /* LARGE_SMB_OFF_T */
 376                 if (asprintf(&syscmd,
 377                         "%s \"%s\" %d %d "
 378                         "%u %lu %lu "
 379                         "%lu %lu %lu ",
 380                         set_quota_command, path, qtype, _id, dp->qflags,
 381                         (long unsigned)dp->softlimit,(long unsigned)dp->hardlimit,
 382                         (long unsigned)dp->isoftlimit,(long unsigned)dp->ihardlimit,
 383                         (long unsigned)dp->bsize) < 0) {
 384                         return -1;
 385                 }
 386 #endif /* LARGE_SMB_OFF_T */
 387
 388                 DEBUG (3, ("get_quota: Running command %s\n", syscmd));
 389
 390                 lines = file_lines_pload(syscmd, NULL);
 391                 SAFE_FREE(syscmd);
 392                 if (lines) {
 393                         char *line = lines[0];
 394
 395                         DEBUG (3, ("Read output from set_quota, \"%s\"\n", line));
 396
 397                         TALLOC_FREE(lines);
 398
 399                         return 0;
 400                 }
 401                 DEBUG (0, ("set_quota_command failed!\n"));
 402                 return -1;
 403         }
 404
 405         errno = ENOSYS;
 406         return -1;
 407 }
 408
 409 int sys_get_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 410 {
 411         int ret = -1;
 412         int i;
 413         bool ready = False;
 414         char *mntpath = NULL;
 415         char *bdev = NULL;
 416         char *fs = NULL;
 417
 418         if (!path||!dp)
 419                 smb_panic("sys_get_quota: called with NULL pointer");
 420
 421         if (command_get_quota(path, qtype, id, dp)==0) {
 422                 return 0;
 423         } else if (errno != ENOSYS) {
 424                 return -1;
 425         }
 426
 427         if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
 428                 DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
 429                 return ret;
 430         }
 431
 432         errno = 0;
 433         DEBUG(10,("sys_get_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
 434
 435         for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].get_quota);i++) {
 436                 if (strcmp(fs,sys_quota_backends[i].name)==0) {
 437                         ret = sys_quota_backends[i].get_quota(mntpath, bdev, qtype, id, dp);
 438                         if (ret!=0) {
 439                                 DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 440                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 441                         } else {
 442                                 DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 443                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 444                         }
 445                         ready = True;
 446                         break;
 447                 }
 448         }
 449
 450         if (!ready) {
 451                 /* use the default vfs quota functions */
 452                 ret=sys_get_vfs_quota(mntpath, bdev, qtype, id, dp);
 453                 if (ret!=0) {
 454                         DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s\n",
 455                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 456                 } else {
 457                         DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 458                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 459                 }
 460         }
 461
 462         SAFE_FREE(mntpath);
 463         SAFE_FREE(bdev);
 464         SAFE_FREE(fs);
 465
 466         if ((ret!=0)&& (errno == EDQUOT)) {
 467                 DEBUG(10,("sys_get_quota() warning over quota!\n"));
 468                 return 0;
 469         }
 470
 471         return ret;
 472 }
 473
 474 int sys_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 475 {
 476         int ret = -1;
 477         int i;
 478         bool ready = False;
 479         char *mntpath = NULL;
 480         char *bdev = NULL;
 481         char *fs = NULL;
 482
 483         /* find the block device file */
 484
 485         if (!path||!dp)
 486                 smb_panic("get_smb_quota: called with NULL pointer");
 487
 488         if (command_set_quota(path, qtype, id, dp)==0) {
 489                 return 0;
 490         } else if (errno != ENOSYS) {
 491                 return -1;
 492         }
 493
 494         if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
 495                 DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
 496                 return ret;
 497         }
 498
 499         errno = 0;
 500         DEBUG(10,("sys_set_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
 501
 502         for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].set_quota);i++) {
 503                 if (strcmp(fs,sys_quota_backends[i].name)==0) {
 504                         ret = sys_quota_backends[i].set_quota(mntpath, bdev, qtype, id, dp);
 505                         if (ret!=0) {
 506                                 DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 507                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 508                         } else {
 509                                 DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 510                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 511                         }
 512                         ready = True;
 513                         break;
 514                 }
 515         }
 516
 517         if (!ready) {
 518                 /* use the default vfs quota functions */
 519                 ret=sys_set_vfs_quota(mntpath, bdev, qtype, id, dp);
 520                 if (ret!=0) {
 521                         DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 522                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 523                 } else {
 524                         DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 525                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 526                 }
 527         }
 528
 529         SAFE_FREE(mntpath);
 530         SAFE_FREE(bdev);
 531         SAFE_FREE(fs);
 532
 533         if ((ret!=0)&& (errno == EDQUOT)) {
 534                 DEBUG(10,("sys_set_quota() warning over quota!\n"));
 535                 return 0;
 536         }
 537
 538         return ret;
 539 }
 540
 541 #else /* HAVE_SYS_QUOTAS */
 542  void dummy_sysquotas_c(void);
 543
 544  void dummy_sysquotas_c(void)
 545 {
 546         return;
 547 }
 548 #endif /* HAVE_SYS_QUOTAS */
 549