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