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