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 2 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, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21
  22 #include "includes.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_QUOTA
  26
  27 #ifdef HAVE_SYS_QUOTAS
  28
  29 #if defined(HAVE_QUOTACTL_4A)
  30
  31 /*#endif HAVE_QUOTACTL_4A */
  32 #elif defined(HAVE_QUOTACTL_4B)
  33
  34 #error HAVE_QUOTACTL_4B not implemeted
  35
  36 /*#endif HAVE_QUOTACTL_4B */
  37 #elif defined(HAVE_QUOTACTL_3)
  38
  39 #error HAVE_QUOTACTL_3 not implemented
  40
  41 /* #endif  HAVE_QUOTACTL_3 */
  42 #else /* NO_QUOTACTL_USED */
  43
  44 #endif /* NO_QUOTACTL_USED */
  45
  46 #ifdef HAVE_MNTENT
  47 static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
  48 {
  49         int ret = -1;
  50         SMB_STRUCT_STAT S;
  51         FILE *fp;
  52         struct mntent *mnt;
  53         SMB_DEV_T devno;
  54
  55         /* find the block device file */
  56
  57         if (!path||!mntpath||!bdev||!fs)
  58                 smb_panic("sys_path_to_bdev: called with NULL pointer");
  59
  60         (*mntpath) = NULL;
  61         (*bdev) = NULL;
  62         (*fs) = NULL;
  63
  64         if ( sys_stat(path, &S) == -1 )
  65                 return (-1);
  66
  67         devno = S.st_dev ;
  68
  69         fp = setmntent(MOUNTED,"r");
  70         if (fp == NULL) {
  71                 return -1;
  72         }
  73
  74         while ((mnt = getmntent(fp))) {
  75                 if ( sys_stat(mnt->mnt_dir,&S) == -1 )
  76                         continue ;
  77
  78                 if (S.st_dev == devno) {
  79                         (*mntpath) = SMB_STRDUP(mnt->mnt_dir);
  80                         (*bdev) = SMB_STRDUP(mnt->mnt_fsname);
  81                         (*fs)   = SMB_STRDUP(mnt->mnt_type);
  82                         if ((*mntpath)&&(*bdev)&&(*fs)) {
  83                                 ret = 0;
  84                         } else {
  85                                 SAFE_FREE(*mntpath);
  86                                 SAFE_FREE(*bdev);
  87                                 SAFE_FREE(*fs);
  88                                 ret = -1;
  89                         }
  90
  91                         break;
  92                 }
  93         }
  94
  95         endmntent(fp) ;
  96
  97         return ret;
  98 }
  99 /* #endif HAVE_MNTENT */
 100 #elif defined(HAVE_DEVNM)
 101
 102 /* we have this on HPUX, ... */
 103 static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
 104 {
 105         int ret = -1;
 106         char dev_disk[256];
 107         SMB_STRUCT_STAT S;
 108
 109         if (!path||!mntpath||!bdev||!fs)
 110                 smb_panic("sys_path_to_bdev: called with NULL pointer");
 111
 112         (*mntpath) = NULL;
 113         (*bdev) = NULL;
 114         (*fs) = NULL;
 115
 116         /* find the block device file */
 117
 118         if ((ret=sys_stat(path, &S))!=0) {
 119                 return ret;
 120         }
 121
 122         if ((ret=devnm(S_IFBLK, S.st_dev, dev_disk, 256, 1))!=0) {
 123                 return ret;
 124         }
 125
 126         /* we should get the mntpath right...
 127          * but I don't know how
 128          * --metze
 129          */
 130         (*mntpath) = SMB_STRDUP(path);
 131         (*bdev) = SMB_STRDUP(dev_disk);
 132         if ((*mntpath)&&(*bdev)) {
 133                 ret = 0;
 134         } else {
 135                 SAFE_FREE(*mntpath);
 136                 SAFE_FREE(*bdev);
 137                 ret = -1;
 138         }
 139
 140
 141         return ret;
 142 }
 143
 144 /* #endif HAVE_DEVNM */
 145 #else
 146 /* we should fake this up...*/
 147 static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
 148 {
 149         int ret = -1;
 150
 151         if (!path||!mntpath||!bdev||!fs)
 152                 smb_panic("sys_path_to_bdev: called with NULL pointer");
 153
 154         (*mntpath) = NULL;
 155         (*bdev) = NULL;
 156         (*fs) = NULL;
 157
 158         (*mntpath) = SMB_STRDUP(path);
 159         if (*mntpath) {
 160                 ret = 0;
 161         } else {
 162                 SAFE_FREE(*mntpath);
 163                 ret = -1;
 164         }
 165
 166         return ret;
 167 }
 168 #endif
 169
 170 /*********************************************************************
 171  Now the list of all filesystem specific quota systems we have found
 172 **********************************************************************/
 173 static struct {
 174         const char *name;
 175         int (*get_quota)(const char *path, const char *bdev, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp);
 176         int (*set_quota)(const char *path, const char *bdev, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp);
 177 } sys_quota_backends[] = {
 178 #ifdef HAVE_XFS_QUOTAS
 179         {"xfs", sys_get_xfs_quota,      sys_set_xfs_quota},
 180 #endif /* HAVE_XFS_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
 188         get_quota_command = lp_get_quota_command();
 189         if (get_quota_command && *get_quota_command) {
 190                 const char *p;
 191                 char *p2;
 192                 char **lines;
 193                 pstring syscmd;
 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                 slprintf(syscmd, sizeof(syscmd)-1,
 211                         "%s \"%s\" %d %d",
 212                         get_quota_command, path, qtype, _id);
 213
 214                 DEBUG (3, ("get_quota: Running command %s\n", syscmd));
 215
 216                 lines = file_lines_pload(syscmd, NULL);
 217                 if (lines) {
 218                         char *line = lines[0];
 219
 220                         DEBUG (3, ("Read output from get_quota, \"%s\"\n", line));
 221
 222                         /* we need to deal with long long unsigned here, if supported */
 223
 224                         dp->qflags = (enum SMB_QUOTA_TYPE)strtoul(line, &p2, 10);
 225                         p = p2;
 226                         while (p && *p && isspace(*p))
 227                                 p++;
 228                         if (p && *p)
 229                                 dp->curblocks = STR_TO_SMB_BIG_UINT(p, &p);
 230                         else
 231                                 goto invalid_param;
 232                         while (p && *p && isspace(*p))
 233                                 p++;
 234                         if (p && *p)
 235                                 dp->softlimit = STR_TO_SMB_BIG_UINT(p, &p);
 236                         else
 237                                 goto invalid_param;
 238                         while (p && *p && isspace(*p))
 239                                 p++;
 240                         if (p && *p)
 241                                 dp->hardlimit = STR_TO_SMB_BIG_UINT(p, &p);
 242                         else
 243                                 goto invalid_param;
 244                         while (p && *p && isspace(*p))
 245                                 p++;
 246                         if (p && *p)
 247                                 dp->curinodes = STR_TO_SMB_BIG_UINT(p, &p);
 248                         else
 249                                 goto invalid_param;
 250                         while (p && *p && isspace(*p))
 251                                 p++;
 252                         if (p && *p)
 253                                 dp->isoftlimit = STR_TO_SMB_BIG_UINT(p, &p);
 254                         else
 255                                 goto invalid_param;
 256                         while (p && *p && isspace(*p))
 257                                 p++;
 258                         if (p && *p)
 259                                 dp->ihardlimit = STR_TO_SMB_BIG_UINT(p, &p);
 260                         else
 261                                 goto invalid_param;
 262                         while (p && *p && isspace(*p))
 263                                 p++;
 264                         if (p && *p)
 265                                 dp->bsize = STR_TO_SMB_BIG_UINT(p, NULL);
 266                         else
 267                                 dp->bsize = 1024;
 268                         file_lines_free(lines);
 269                         DEBUG (3, ("Parsed output of get_quota, ...\n"));
 270
 271 #ifdef LARGE_SMB_OFF_T
 272                         DEBUGADD (5,(
 273                                 "qflags:%u curblocks:%llu softlimit:%llu hardlimit:%llu\n"
 274                                 "curinodes:%llu isoftlimit:%llu ihardlimit:%llu bsize:%llu\n",
 275                                 dp->qflags,(long long unsigned)dp->curblocks,
 276                                 (long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
 277                                 (long long unsigned)dp->curinodes,
 278                                 (long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
 279                                 (long long unsigned)dp->bsize));
 280 #else /* LARGE_SMB_OFF_T */
 281                         DEBUGADD (5,(
 282                                 "qflags:%u curblocks:%lu softlimit:%lu hardlimit:%lu\n"
 283                                 "curinodes:%lu isoftlimit:%lu ihardlimit:%lu bsize:%lu\n",
 284                                 dp->qflags,(long unsigned)dp->curblocks,
 285                                 (long unsigned)dp->softlimit,(long unsigned)dp->hardlimit,
 286                                 (long unsigned)dp->curinodes,
 287                                 (long unsigned)dp->isoftlimit,(long unsigned)dp->ihardlimit,
 288                                 (long unsigned)dp->bsize));
 289 #endif /* LARGE_SMB_OFF_T */
 290                         return 0;
 291                 }
 292
 293                 DEBUG (0, ("get_quota_command failed!\n"));
 294                 return -1;
 295         }
 296
 297         errno = ENOSYS;
 298         return -1;
 299
 300 invalid_param:
 301         DEBUG(0,("The output of get_quota_command is invalid!\n"));
 302         return -1;
 303 }
 304
 305 static int command_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 306 {
 307         const char *set_quota_command;
 308
 309         set_quota_command = lp_set_quota_command();
 310         if (set_quota_command && *set_quota_command) {
 311                 char **lines;
 312                 pstring syscmd;
 313                 int _id = -1;
 314
 315                 switch(qtype) {
 316                         case SMB_USER_QUOTA_TYPE:
 317                         case SMB_USER_FS_QUOTA_TYPE:
 318                                 _id = id.uid;
 319                                 break;
 320                         case SMB_GROUP_QUOTA_TYPE:
 321                         case SMB_GROUP_FS_QUOTA_TYPE:
 322                                 _id = id.gid;
 323                                 break;
 324                         default:
 325                                 return -1;
 326                 }
 327
 328 #ifdef LARGE_SMB_OFF_T
 329                 slprintf(syscmd, sizeof(syscmd)-1,
 330                         "%s \"%s\" %d %d "
 331                         "%u %llu %llu "
 332                         "%llu %llu %llu ",
 333                         set_quota_command, path, qtype, _id, dp->qflags,
 334                         (long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
 335                         (long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
 336                         (long long unsigned)dp->bsize);
 337 #else /* LARGE_SMB_OFF_T */
 338                 slprintf(syscmd, sizeof(syscmd)-1,
 339                         "%s \"%s\" %d %d "
 340                         "%u %lu %lu "
 341                         "%lu %lu %lu ",
 342                         set_quota_command, path, qtype, _id, dp->qflags,
 343                         (long unsigned)dp->softlimit,(long unsigned)dp->hardlimit,
 344                         (long unsigned)dp->isoftlimit,(long unsigned)dp->ihardlimit,
 345                         (long unsigned)dp->bsize);
 346 #endif /* LARGE_SMB_OFF_T */
 347
 348
 349
 350                 DEBUG (3, ("get_quota: Running command %s\n", syscmd));
 351
 352                 lines = file_lines_pload(syscmd, NULL);
 353                 if (lines) {
 354                         char *line = lines[0];
 355
 356                         DEBUG (3, ("Read output from set_quota, \"%s\"\n", line));
 357
 358                         file_lines_free(lines);
 359
 360                         return 0;
 361                 }
 362                 DEBUG (0, ("set_quota_command failed!\n"));
 363                 return -1;
 364         }
 365
 366         errno = ENOSYS;
 367         return -1;
 368 }
 369
 370 int sys_get_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 371 {
 372         int ret = -1;
 373         int i;
 374         BOOL ready = False;
 375         char *mntpath = NULL;
 376         char *bdev = NULL;
 377         char *fs = NULL;
 378
 379         if (!path||!dp)
 380                 smb_panic("sys_get_quota: called with NULL pointer");
 381
 382         if (command_get_quota(path, qtype, id, dp)==0) {
 383                 return 0;
 384         } else if (errno != ENOSYS) {
 385                 return -1;
 386         }
 387
 388         if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
 389                 DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
 390                 return ret;
 391         }
 392
 393         errno = 0;
 394         DEBUG(10,("sys_get_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
 395
 396         for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].get_quota);i++) {
 397                 if (strcmp(fs,sys_quota_backends[i].name)==0) {
 398                         ret = sys_quota_backends[i].get_quota(mntpath, bdev, qtype, id, dp);
 399                         if (ret!=0) {
 400                                 DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 401                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 402                         } else {
 403                                 DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 404                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 405                         }
 406                         ready = True;
 407                         break;
 408                 }
 409         }
 410
 411         if (!ready) {
 412                 /* use the default vfs quota functions */
 413                 ret=sys_get_vfs_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                                 "vfs",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                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 420                 }
 421         }
 422
 423         SAFE_FREE(mntpath);
 424         SAFE_FREE(bdev);
 425         SAFE_FREE(fs);
 426
 427         if ((ret!=0)&& (errno == EDQUOT)) {
 428                 DEBUG(10,("sys_get_quota() warning over quota!\n"));
 429                 return 0;
 430         }
 431
 432         return ret;
 433 }
 434
 435 int sys_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 436 {
 437         int ret = -1;
 438         int i;
 439         BOOL ready = False;
 440         char *mntpath = NULL;
 441         char *bdev = NULL;
 442         char *fs = NULL;
 443
 444         /* find the block device file */
 445
 446         if (!path||!dp)
 447                 smb_panic("get_smb_quota: called with NULL pointer");
 448
 449         if (command_set_quota(path, qtype, id, dp)==0) {
 450                 return 0;
 451         } else if (errno != ENOSYS) {
 452                 return -1;
 453         }
 454
 455         if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
 456                 DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
 457                 return ret;
 458         }
 459
 460         errno = 0;
 461         DEBUG(10,("sys_set_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
 462
 463         for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].set_quota);i++) {
 464                 if (strcmp(fs,sys_quota_backends[i].name)==0) {
 465                         ret = sys_quota_backends[i].set_quota(mntpath, bdev, qtype, id, dp);
 466                         if (ret!=0) {
 467                                 DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
 468                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
 469                         } else {
 470                                 DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
 471                                         fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 472                         }
 473                         ready = True;
 474                         break;
 475                 }
 476         }
 477
 478         if (!ready) {
 479                 /* use the default vfs quota functions */
 480                 ret=sys_set_vfs_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                                 "vfs",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                                 "vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
 487                 }
 488         }
 489
 490         SAFE_FREE(mntpath);
 491         SAFE_FREE(bdev);
 492         SAFE_FREE(fs);
 493
 494         if ((ret!=0)&& (errno == EDQUOT)) {
 495                 DEBUG(10,("sys_set_quota() warning over quota!\n"));
 496                 return 0;
 497         }
 498
 499         return ret;
 500 }
 501
 502 #else /* HAVE_SYS_QUOTAS */
 503  void dummy_sysquotas_c(void);
 504
 505  void dummy_sysquotas_c(void)
 506 {
 507         return;
 508 }
 509 #endif /* HAVE_SYS_QUOTAS */
 510