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 #ifdef HAVE_NFS_QUOTAS
 183         {"nfs", sys_get_nfs_quota,      sys_set_nfs_quota},
 184         {"nfs4", sys_get_nfs_quota,     sys_set_nfs_quota},
 185 #endif /* HAVE_NFS_QUOTAS */
 186         {NULL,  NULL,                   NULL}
 187 };
 188
 189 static int command_get_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 190 {
 191         const char *get_quota_command;
 192         char **lines = NULL;
 193
 194         get_quota_command = lp_get_quota_command();
 195         if (get_quota_command && *get_quota_command) {
 196                 const char *p;
 197                 char *p2;
 198                 char *syscmd = NULL;
 199                 int _id = -1;
 200
 201                 switch(qtype) {
 202                         case SMB_USER_QUOTA_TYPE:
 203                         case SMB_USER_FS_QUOTA_TYPE:
 204                                 _id = id.uid;
 205                                 break;
 206                         case SMB_GROUP_QUOTA_TYPE:
 207                         case SMB_GROUP_FS_QUOTA_TYPE:
 208                                 _id = id.gid;
 209                                 break;
 210                         default:
 211                                 DEBUG(0,("invalid quota type.\n"));
 212                                 return -1;
 213                 }
 214
 215                 if (asprintf(&syscmd, "%s \"%s\" %d %d",
 216                         get_quota_command, path, qtype, _id) < 0) {
 217                         return -1;
 218                 }
 219
 220                 DEBUG (3, ("get_quota: Running command %s\n", syscmd));
 221
 222                 lines = file_lines_pload(syscmd, NULL);
 223                 SAFE_FREE(syscmd);
 224
 225                 if (lines) {
 226                         char *line = lines[0];
 227
 228                         DEBUG (3, ("Read output from get_quota, \"%s\"\n", line));
 229
 230                         /* we need to deal with long long unsigned here, if supported */
 231
 232                         dp->qflags = (enum SMB_QUOTA_TYPE)strtoul(line, &p2, 10);
 233                         p = p2;
 234                         while (p && *p && isspace(*p)) {
 235                                 p++;
 236                         }
 237
 238                         if (p && *p) {
 239                                 dp->curblocks = STR_TO_SMB_BIG_UINT(p, &p);
 240                         } else {
 241                                 goto invalid_param;
 242                         }
 243
 244                         while (p && *p && isspace(*p)) {
 245                                 p++;
 246                         }
 247
 248                         if (p && *p) {
 249                                 dp->softlimit = STR_TO_SMB_BIG_UINT(p, &p);
 250                         } else {
 251                                 goto invalid_param;
 252                         }
 253
 254                         while (p && *p && isspace(*p)) {
 255                                 p++;
 256                         }
 257
 258                         if (p && *p) {
 259                                 dp->hardlimit = STR_TO_SMB_BIG_UINT(p, &p);
 260                         } else {
 261                                 goto invalid_param;
 262                         }
 263
 264                         while (p && *p && isspace(*p)) {
 265                                 p++;
 266                         }
 267
 268                         if (p && *p) {
 269                                 dp->curinodes = STR_TO_SMB_BIG_UINT(p, &p);
 270                         } else {
 271                                 goto invalid_param;
 272                         }
 273
 274                         while (p && *p && isspace(*p)) {
 275                                 p++;
 276                         }
 277
 278                         if (p && *p) {
 279                                 dp->isoftlimit = STR_TO_SMB_BIG_UINT(p, &p);
 280                         } else {
 281                                 goto invalid_param;
 282                         }
 283
 284                         while (p && *p && isspace(*p)) {
 285                                 p++;
 286                         }
 287
 288                         if (p && *p) {
 289                                 dp->ihardlimit = STR_TO_SMB_BIG_UINT(p, &p);
 290                         } else {
 291                                 goto invalid_param;
 292                         }
 293
 294                         while (p && *p && isspace(*p)) {
 295                                 p++;
 296                         }
 297
 298                         if (p && *p) {
 299                                 dp->bsize = STR_TO_SMB_BIG_UINT(p, NULL);
 300                         } else {
 301                                 dp->bsize = 1024;
 302                         }
 303
 304                         TALLOC_FREE(lines);
 305                         lines = NULL;
 306
 307                         DEBUG (3, ("Parsed output of get_quota, ...\n"));
 308
 309                         DEBUGADD (5,(
 310                                 "qflags:%u curblocks:%llu softlimit:%llu hardlimit:%llu\n"
 311                                 "curinodes:%llu isoftlimit:%llu ihardlimit:%llu bsize:%llu\n",
 312                                 dp->qflags,(long long unsigned)dp->curblocks,
 313                                 (long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
 314                                 (long long unsigned)dp->curinodes,
 315                                 (long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
 316                                 (long long unsigned)dp->bsize));
 317                         return 0;
 318                 }
 319
 320                 DEBUG (0, ("get_quota_command failed!\n"));
 321                 return -1;
 322         }
 323
 324         errno = ENOSYS;
 325         return -1;
 326
 327 invalid_param:
 328
 329         TALLOC_FREE(lines);
 330         DEBUG(0,("The output of get_quota_command is invalid!\n"));
 331         return -1;
 332 }
 333
 334 static int command_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 335 {
 336         const char *set_quota_command;
 337
 338         set_quota_command = lp_set_quota_command();
 339         if (set_quota_command && *set_quota_command) {
 340                 char **lines = NULL;
 341                 char *syscmd = NULL;
 342                 int _id = -1;
 343
 344                 switch(qtype) {
 345                         case SMB_USER_QUOTA_TYPE:
 346                         case SMB_USER_FS_QUOTA_TYPE:
 347                                 _id = id.uid;
 348                                 break;
 349                         case SMB_GROUP_QUOTA_TYPE:
 350                         case SMB_GROUP_FS_QUOTA_TYPE:
 351                                 _id = id.gid;
 352                                 break;
 353                         default:
 354                                 return -1;
 355                 }
 356
 357                 if (asprintf(&syscmd,
 358                         "%s \"%s\" %d %d "
 359                         "%u %llu %llu "
 360                         "%llu %llu %llu ",
 361                         set_quota_command, path, qtype, _id, dp->qflags,
 362                         (long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
 363                         (long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
 364                         (long long unsigned)dp->bsize) < 0) {
 365                         return -1;
 366                 }
 367
 368                 DEBUG (3, ("get_quota: Running command %s\n", syscmd));
 369
 370                 lines = file_lines_pload(syscmd, NULL);
 371                 SAFE_FREE(syscmd);
 372                 if (lines) {
 373                         char *line = lines[0];
 374
 375                         DEBUG (3, ("Read output from set_quota, \"%s\"\n", line));
 376
 377                         TALLOC_FREE(lines);
 378
 379                         return 0;
 380                 }
 381                 DEBUG (0, ("set_quota_command failed!\n"));
 382                 return -1;
 383         }
 384
 385         errno = ENOSYS;
 386         return -1;
 387 }
 388
 389 int sys_get_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 390 {
 391         int ret = -1;
 392         int i;
 393         bool ready = False;
 394         char *mntpath = NULL;
 395         char *bdev = NULL;
 396         char *fs = NULL;
 397
 398         if (!path||!dp)
 399                 smb_panic("sys_get_quota: called with NULL pointer");
 400
 401         if (command_get_quota(path, qtype, id, dp)==0) {
 402                 return 0;
 403         } else if (errno != ENOSYS) {
 404                 return -1;
 405         }
 406
 407         if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
 408                 DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
 409                 return ret;
 410         }
 411
 412         errno = 0;
 413         DEBUG(10,("sys_get_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
 414
 415         for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].get_quota);i++) {
 416                 if (strcmp(fs,sys_quota_backends[i].name)==0) {
 417                         ret = sys_quota_backends[i].get_quota(mntpath, bdev, qtype, id, dp);
 418                         if (ret!=0) {
 419                                 DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 420                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 421                         } else {
 422                                 DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 423                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 424                         }
 425                         ready = True;
 426                         break;
 427                 }
 428         }
 429
 430         if (!ready) {
 431                 /* use the default vfs quota functions */
 432                 ret=sys_get_vfs_quota(mntpath, bdev, qtype, id, dp);
 433                 if (ret!=0) {
 434                         DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s\n",
 435                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 436                 } else {
 437                         DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 438                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 439                 }
 440         }
 441
 442         SAFE_FREE(mntpath);
 443         SAFE_FREE(bdev);
 444         SAFE_FREE(fs);
 445
 446         if ((ret!=0)&& (errno == EDQUOT)) {
 447                 DEBUG(10,("sys_get_quota() warning over quota!\n"));
 448                 return 0;
 449         }
 450
 451         return ret;
 452 }
 453
 454 int sys_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 455 {
 456         int ret = -1;
 457         int i;
 458         bool ready = False;
 459         char *mntpath = NULL;
 460         char *bdev = NULL;
 461         char *fs = NULL;
 462
 463         /* find the block device file */
 464
 465         if (!path||!dp)
 466                 smb_panic("get_smb_quota: called with NULL pointer");
 467
 468         if (command_set_quota(path, qtype, id, dp)==0) {
 469                 return 0;
 470         } else if (errno != ENOSYS) {
 471                 return -1;
 472         }
 473
 474         if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
 475                 DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
 476                 return ret;
 477         }
 478
 479         errno = 0;
 480         DEBUG(10,("sys_set_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
 481
 482         for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].set_quota);i++) {
 483                 if (strcmp(fs,sys_quota_backends[i].name)==0) {
 484                         ret = sys_quota_backends[i].set_quota(mntpath, bdev, qtype, id, dp);
 485                         if (ret!=0) {
 486                                 DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 487                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 488                         } else {
 489                                 DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 490                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 491                         }
 492                         ready = True;
 493                         break;
 494                 }
 495         }
 496
 497         if (!ready) {
 498                 /* use the default vfs quota functions */
 499                 ret=sys_set_vfs_quota(mntpath, bdev, qtype, id, dp);
 500                 if (ret!=0) {
 501                         DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 502                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 503                 } else {
 504                         DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 505                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 506                 }
 507         }
 508
 509         SAFE_FREE(mntpath);
 510         SAFE_FREE(bdev);
 511         SAFE_FREE(fs);
 512
 513         if ((ret!=0)&& (errno == EDQUOT)) {
 514                 DEBUG(10,("sys_set_quota() warning over quota!\n"));
 515                 return 0;
 516         }
 517
 518         return ret;
 519 }
 520
 521 #else /* HAVE_SYS_QUOTAS */
 522  void dummy_sysquotas_c(void);
 523
 524  void dummy_sysquotas_c(void)
 525 {
 526         return;
 527 }
 528 #endif /* HAVE_SYS_QUOTAS */
 529