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 /*#endif HAVE_QUOTACTL_4B */
  34 #elif defined(HAVE_QUOTACTL_3)
  35
  36 #error HAVE_QUOTACTL_3 not implemented
  37
  38 /* #endif  HAVE_QUOTACTL_3 */
  39 #else /* NO_QUOTACTL_USED */
  40
  41 #endif /* NO_QUOTACTL_USED */
  42
  43 #ifdef HAVE_MNTENT
  44 static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
  45 {
  46         int ret = -1;
  47         SMB_STRUCT_STAT S;
  48         FILE *fp;
  49         struct mntent *mnt;
  50         SMB_DEV_T devno;
  51
  52         /* find the block device file */
  53
  54         if (!path||!mntpath||!bdev||!fs)
  55                 smb_panic("sys_path_to_bdev: called with NULL pointer");
  56
  57         (*mntpath) = NULL;
  58         (*bdev) = NULL;
  59         (*fs) = NULL;
  60
  61         if ( sys_stat(path, &S, false) == -1 )
  62                 return (-1);
  63
  64         devno = S.st_ex_dev ;
  65
  66         fp = setmntent(MOUNTED,"r");
  67         if (fp == NULL) {
  68                 return -1;
  69         }
  70
  71         while ((mnt = getmntent(fp))) {
  72                 if ( sys_stat(mnt->mnt_dir, &S, false) == -1 )
  73                         continue ;
  74
  75                 if (S.st_ex_dev == devno) {
  76                         (*mntpath) = SMB_STRDUP(mnt->mnt_dir);
  77                         (*bdev) = SMB_STRDUP(mnt->mnt_fsname);
  78                         (*fs)   = SMB_STRDUP(mnt->mnt_type);
  79                         if ((*mntpath)&&(*bdev)&&(*fs)) {
  80                                 ret = 0;
  81                         } else {
  82                                 SAFE_FREE(*mntpath);
  83                                 SAFE_FREE(*bdev);
  84                                 SAFE_FREE(*fs);
  85                                 ret = -1;
  86                         }
  87
  88                         break;
  89                 }
  90         }
  91
  92         endmntent(fp) ;
  93
  94         return ret;
  95 }
  96 /* #endif HAVE_MNTENT */
  97 #elif defined(HAVE_DEVNM)
  98
  99 /* we have this on HPUX, ... */
 100 static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
 101 {
 102         int ret = -1;
 103         char dev_disk[256];
 104         SMB_STRUCT_STAT S;
 105
 106         if (!path||!mntpath||!bdev||!fs)
 107                 smb_panic("sys_path_to_bdev: called with NULL pointer");
 108
 109         (*mntpath) = NULL;
 110         (*bdev) = NULL;
 111         (*fs) = NULL;
 112
 113         /* find the block device file */
 114
 115         if ((ret=sys_stat(path, &S, false))!=0) {
 116                 return ret;
 117         }
 118
 119         if ((ret=devnm(S_IFBLK, S.st_ex_dev, dev_disk, 256, 1))!=0) {
 120                 return ret;
 121         }
 122
 123         /* we should get the mntpath right...
 124          * but I don't know how
 125          * --metze
 126          */
 127         (*mntpath) = SMB_STRDUP(path);
 128         (*bdev) = SMB_STRDUP(dev_disk);
 129         if ((*mntpath)&&(*bdev)) {
 130                 ret = 0;
 131         } else {
 132                 SAFE_FREE(*mntpath);
 133                 SAFE_FREE(*bdev);
 134                 ret = -1;
 135         }
 136
 137
 138         return ret;
 139 }
 140
 141 /* #endif HAVE_DEVNM */
 142 #else
 143 /* we should fake this up...*/
 144 static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
 145 {
 146         int ret = -1;
 147
 148         if (!path||!mntpath||!bdev||!fs)
 149                 smb_panic("sys_path_to_bdev: called with NULL pointer");
 150
 151         (*mntpath) = NULL;
 152         (*bdev) = NULL;
 153         (*fs) = NULL;
 154
 155         (*mntpath) = SMB_STRDUP(path);
 156         if (*mntpath) {
 157                 ret = 0;
 158         } else {
 159                 SAFE_FREE(*mntpath);
 160                 ret = -1;
 161         }
 162
 163         return ret;
 164 }
 165 #endif
 166
 167 /*********************************************************************
 168  Now the list of all filesystem specific quota systems we have found
 169 **********************************************************************/
 170 static struct {
 171         const char *name;
 172         int (*get_quota)(const char *path, const char *bdev, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp);
 173         int (*set_quota)(const char *path, const char *bdev, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp);
 174 } sys_quota_backends[] = {
 175 #if defined HAVE_XFS_QUOTAS || defined HAVE_LINUX_XFS_QUOTAS
 176         {"xfs", sys_get_xfs_quota,      sys_set_xfs_quota},
 177 #endif /* HAVE_XFS_QUOTAS */
 178 #ifdef HAVE_NFS_QUOTAS
 179         {"nfs", sys_get_nfs_quota,      sys_set_nfs_quota},
 180         {"nfs4", sys_get_nfs_quota,     sys_set_nfs_quota},
 181 #endif /* HAVE_NFS_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(talloc_tos());
 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 = 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                         DEBUGADD (5,(
 306                                 "qflags:%u curblocks:%llu softlimit:%llu hardlimit:%llu\n"
 307                                 "curinodes:%llu isoftlimit:%llu ihardlimit:%llu bsize:%llu\n",
 308                                 dp->qflags,(long long unsigned)dp->curblocks,
 309                                 (long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
 310                                 (long long unsigned)dp->curinodes,
 311                                 (long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
 312                                 (long long unsigned)dp->bsize));
 313                         return 0;
 314                 }
 315
 316                 DEBUG (0, ("get_quota_command failed!\n"));
 317                 return -1;
 318         }
 319
 320         errno = ENOSYS;
 321         return -1;
 322
 323 invalid_param:
 324
 325         TALLOC_FREE(lines);
 326         DEBUG(0,("The output of get_quota_command is invalid!\n"));
 327         return -1;
 328 }
 329
 330 static int command_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 331 {
 332         const char *set_quota_command;
 333
 334         set_quota_command = lp_set_quota_command(talloc_tos());
 335         if (set_quota_command && *set_quota_command) {
 336                 char **lines = NULL;
 337                 char *syscmd = NULL;
 338                 int _id = -1;
 339
 340                 switch(qtype) {
 341                         case SMB_USER_QUOTA_TYPE:
 342                         case SMB_USER_FS_QUOTA_TYPE:
 343                                 _id = id.uid;
 344                                 break;
 345                         case SMB_GROUP_QUOTA_TYPE:
 346                         case SMB_GROUP_FS_QUOTA_TYPE:
 347                                 _id = id.gid;
 348                                 break;
 349                         default:
 350                                 return -1;
 351                 }
 352
 353                 if (asprintf(&syscmd,
 354                         "%s \"%s\" %d %d "
 355                         "%u %llu %llu "
 356                         "%llu %llu %llu ",
 357                         set_quota_command, path, qtype, _id, dp->qflags,
 358                         (long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
 359                         (long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
 360                         (long long unsigned)dp->bsize) < 0) {
 361                         return -1;
 362                 }
 363
 364                 DEBUG (3, ("get_quota: Running command %s\n", syscmd));
 365
 366                 lines = file_lines_pload(syscmd, NULL);
 367                 SAFE_FREE(syscmd);
 368                 if (lines) {
 369                         char *line = lines[0];
 370
 371                         DEBUG (3, ("Read output from set_quota, \"%s\"\n", line));
 372
 373                         TALLOC_FREE(lines);
 374
 375                         return 0;
 376                 }
 377                 DEBUG (0, ("set_quota_command failed!\n"));
 378                 return -1;
 379         }
 380
 381         errno = ENOSYS;
 382         return -1;
 383 }
 384
 385 int sys_get_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 386 {
 387         int ret = -1;
 388         int i;
 389         bool ready = False;
 390         char *mntpath = NULL;
 391         char *bdev = NULL;
 392         char *fs = NULL;
 393
 394         if (!path||!dp)
 395                 smb_panic("sys_get_quota: called with NULL pointer");
 396
 397         if (command_get_quota(path, qtype, id, dp)==0) {
 398                 return 0;
 399         } else if (errno != ENOSYS) {
 400                 return -1;
 401         }
 402
 403         if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
 404                 DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
 405                 return ret;
 406         }
 407
 408         errno = 0;
 409         DEBUG(10,("sys_get_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
 410
 411         for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].get_quota);i++) {
 412                 if (strcmp(fs,sys_quota_backends[i].name)==0) {
 413                         ret = sys_quota_backends[i].get_quota(mntpath, bdev, qtype, id, dp);
 414                         if (ret!=0) {
 415                                 DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 416                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 417                         } else {
 418                                 DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 419                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 420                         }
 421                         ready = True;
 422                         break;
 423                 }
 424         }
 425
 426         if (!ready) {
 427                 /* use the default vfs quota functions */
 428                 ret=sys_get_vfs_quota(mntpath, bdev, qtype, id, dp);
 429                 if (ret!=0) {
 430                         DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s\n",
 431                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 432                 } else {
 433                         DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 434                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 435                 }
 436         }
 437
 438         SAFE_FREE(mntpath);
 439         SAFE_FREE(bdev);
 440         SAFE_FREE(fs);
 441
 442         if ((ret!=0)&& (errno == EDQUOT)) {
 443                 DEBUG(10,("sys_get_quota() warning over quota!\n"));
 444                 return 0;
 445         }
 446
 447         return ret;
 448 }
 449
 450 int sys_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 451 {
 452         int ret = -1;
 453         int i;
 454         bool ready = False;
 455         char *mntpath = NULL;
 456         char *bdev = NULL;
 457         char *fs = NULL;
 458
 459         /* find the block device file */
 460
 461         if (!path||!dp)
 462                 smb_panic("get_smb_quota: called with NULL pointer");
 463
 464         if (command_set_quota(path, qtype, id, dp)==0) {
 465                 return 0;
 466         } else if (errno != ENOSYS) {
 467                 return -1;
 468         }
 469
 470         if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
 471                 DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
 472                 return ret;
 473         }
 474
 475         errno = 0;
 476         DEBUG(10,("sys_set_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
 477
 478         for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].set_quota);i++) {
 479                 if (strcmp(fs,sys_quota_backends[i].name)==0) {
 480                         ret = sys_quota_backends[i].set_quota(mntpath, bdev, qtype, id, dp);
 481                         if (ret!=0) {
 482                                 DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 483                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 484                         } else {
 485                                 DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 486                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 487                         }
 488                         ready = True;
 489                         break;
 490                 }
 491         }
 492
 493         if (!ready) {
 494                 /* use the default vfs quota functions */
 495                 ret=sys_set_vfs_quota(mntpath, bdev, qtype, id, dp);
 496                 if (ret!=0) {
 497                         DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 498                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 499                 } else {
 500                         DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 501                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 502                 }
 503         }
 504
 505         SAFE_FREE(mntpath);
 506         SAFE_FREE(bdev);
 507         SAFE_FREE(fs);
 508
 509         if ((ret!=0)&& (errno == EDQUOT)) {
 510                 DEBUG(10,("sys_set_quota() warning over quota!\n"));
 511                 return 0;
 512         }
 513
 514         return ret;
 515 }
 516
 517 #else /* HAVE_SYS_QUOTAS */
 518  void dummy_sysquotas_c(void);
 519
 520  void dummy_sysquotas_c(void)
 521 {
 522         return;
 523 }
 524 #endif /* HAVE_SYS_QUOTAS */
 525