source3/lib/sysquotas_nfs.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    System QUOTA function wrappers for NFS
   4    Copyright (C) Michael Adam 2010
   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 #ifndef HAVE_SYS_QUOTAS
  27 #ifdef HAVE_NFS_QUOTAS
  28 #undef HAVE_NFS_QUOTAS
  29 #endif
  30 #endif
  31
  32 #ifdef HAVE_NFS_QUOTAS
  33
  34 /*
  35  * nfs quota support
  36  * This is based on the FreeBSD / SUNOS5 section of quotas.c
  37  */
  38
  39 #include <rpc/rpc.h>
  40 #include <rpc/types.h>
  41 #include <rpcsvc/rquota.h>
  42 #ifdef HAVE_RPC_NETTYPE_H
  43 #include <rpc/nettype.h>
  44 #endif
  45 #include <rpc/xdr.h>
  46
  47 #ifdef HAVE_GETQUOTA_RSLT_GETQUOTA_RSLT_U
  48 #define GQR_RQUOTA getquota_rslt_u.gqr_rquota
  49 #define GQR_STATUS status
  50 #else
  51 #define GQR_RQUOTA gqr_rquota
  52 #define GQR_STATUS gqr_status
  53 #endif
  54
  55 static int my_xdr_getquota_args(XDR *xdrsp, struct getquota_args *args)
  56 {
  57         if (!xdr_string(xdrsp, &args->gqa_pathp, RQ_PATHLEN ))
  58                 return(0);
  59         if (!xdr_int(xdrsp, &args->gqa_uid))
  60                 return(0);
  61         return (1);
  62 }
  63
  64 static int my_xdr_getquota_rslt(XDR *xdrsp, struct getquota_rslt *gqr)
  65 {
  66         int quotastat;
  67
  68         if (!xdr_int(xdrsp, &quotastat)) {
  69                 DEBUG(6,("nfs_quotas: Status bad or zero\n"));
  70                 return 0;
  71         }
  72         gqr->status = quotastat;
  73
  74         if (!xdr_int(xdrsp, &gqr->GQR_RQUOTA.rq_bsize)) {
  75                 DEBUG(6,("nfs_quotas: Block size bad or zero\n"));
  76                 return 0;
  77         }
  78         if (!xdr_bool(xdrsp, &gqr->GQR_RQUOTA.rq_active)) {
  79                 DEBUG(6,("nfs_quotas: Active bad or zero\n"));
  80                 return 0;
  81         }
  82         if (!xdr_int(xdrsp, (int *)&gqr->GQR_RQUOTA.rq_bhardlimit)) {
  83                 DEBUG(6,("nfs_quotas: Hardlimit bad or zero\n"));
  84                 return 0;
  85         }
  86         if (!xdr_int(xdrsp, (int *)&gqr->GQR_RQUOTA.rq_bsoftlimit)) {
  87                 DEBUG(6,("nfs_quotas: Softlimit bad or zero\n"));
  88                 return 0;
  89         }
  90         if (!xdr_int(xdrsp, (int *)&gqr->GQR_RQUOTA.rq_curblocks)) {
  91                 DEBUG(6,("nfs_quotas: Currentblocks bad or zero\n"));
  92                 return 0;
  93         }
  94         return (1);
  95 }
  96
  97
  98 int sys_get_nfs_quota(const char *path, const char *bdev,
  99                       enum SMB_QUOTA_TYPE qtype,
 100                       unid_t id, SMB_DISK_QUOTA *dp)
 101 {
 102         CLIENT *clnt = NULL;
 103         struct getquota_rslt gq_rslt;
 104         struct getquota_args gq_args;
 105         const char *mnttype;
 106         char *cutstr, *pathname, *host, *testpath;
 107         int len;
 108         static struct timeval timeout = {2,0};
 109         enum clnt_stat clnt_stat;
 110
 111         int ret = -1;
 112         uint32 qflags = 0;
 113
 114         if (!path || !bdev || !dp) {
 115                 smb_panic("sys_get_nfs_quota: called with NULL pointer");
 116         }
 117
 118         DEBUG(10, ("sys_get_nfs_quota: path[%s] bdev[%s] qtype[%d]\n",
 119                    path, bdev, qtype));
 120
 121         ZERO_STRUCT(*dp);
 122
 123         dp->qtype = qtype;
 124
 125         if (qtype != SMB_USER_QUOTA_TYPE) {
 126                 DEBUG(3, ("sys_get_nfs_quota: got unsupported quota type '%d', "
 127                           "only supported type is '%d' (SMB_USER_QUOTA_TYPE)\n",
 128                           qtype, SMB_USER_QUOTA_TYPE));
 129                 errno = ENOSYS;
 130                 return -1;
 131         }
 132
 133         mnttype = bdev;
 134         len = strcspn(mnttype, ":");
 135         pathname = strstr(mnttype, ":");
 136         cutstr = (char *) SMB_MALLOC(len+1);
 137         if (cutstr == NULL) {
 138                 errno = ENOMEM;
 139                 return -1;
 140         }
 141
 142         memset(cutstr, '\0', len+1);
 143         host = strncat(cutstr, mnttype, sizeof(char) * len);
 144         testpath = strchr_m(mnttype, ':');
 145         if (testpath == NULL) {
 146                 errno = EINVAL;
 147                 goto out;
 148         }
 149         testpath++;
 150         gq_args.gqa_pathp = testpath;
 151         gq_args.gqa_uid = id.uid;
 152
 153         DEBUG(10, ("sys_get_nfs_quotas: Asking for quota of path '%s' on "
 154                    "host '%s', rpcprog '%i', rpcvers '%i', network '%s'\n",
 155                     host, testpath+1, RQUOTAPROG, RQUOTAVERS, "udp"));
 156
 157         clnt = clnt_create(host, RQUOTAPROG, RQUOTAVERS, "udp");
 158         if (clnt == NULL) {
 159                 ret = -1;
 160                 goto out;
 161         }
 162
 163         clnt->cl_auth = authunix_create_default();
 164         if (clnt->cl_auth == NULL) {
 165                 DEBUG(3, ("sys_get_nfs_quotas: authunix_create_default "
 166                           "failed\n"));
 167                 ret = -1;
 168                 goto out;
 169         }
 170
 171         clnt_stat = clnt_call(clnt,
 172                               RQUOTAPROC_GETQUOTA,
 173                               (const xdrproc_t) my_xdr_getquota_args,
 174                               (caddr_t)&gq_args,
 175                               (const xdrproc_t) my_xdr_getquota_rslt,
 176                               (caddr_t)&gq_rslt,
 177                               timeout);
 178
 179         if (clnt_stat != RPC_SUCCESS) {
 180                 DEBUG(3, ("sys_get_nfs_quotas: clnt_call failed\n"));
 181                 ret = -1;
 182                 goto out;
 183         }
 184
 185         DEBUG(10, ("sys_get_nfs_quotas: getquota_rslt:\n"
 186                    "status       : '%i'\n"
 187                    "bsize        : '%i'\n"
 188                    "active       : '%s'\n"
 189                    "bhardlimit   : '%u'\n"
 190                    "bsoftlimit   : '%u'\n"
 191                    "curblocks    : '%u'\n"
 192                    "fhardlimit   : '%u'\n"
 193                    "fsoftlimit   : '%u'\n"
 194                    "curfiles     : '%u'\n"
 195                    "btimeleft    : '%u'\n"
 196                    "ftimeleft    : '%u'\n",
 197                    gq_rslt.GQR_STATUS,
 198                    gq_rslt.GQR_RQUOTA.rq_bsize,
 199                    gq_rslt.GQR_RQUOTA.rq_active?"yes":"no",
 200                    gq_rslt.GQR_RQUOTA.rq_bhardlimit,
 201                    gq_rslt.GQR_RQUOTA.rq_bsoftlimit,
 202                    gq_rslt.GQR_RQUOTA.rq_curblocks,
 203                    gq_rslt.GQR_RQUOTA.rq_fhardlimit,
 204                    gq_rslt.GQR_RQUOTA.rq_fsoftlimit,
 205                    gq_rslt.GQR_RQUOTA.rq_curfiles,
 206                    gq_rslt.GQR_RQUOTA.rq_btimeleft,
 207                    gq_rslt.GQR_RQUOTA.rq_ftimeleft));
 208
 209         /*
 210          * gqr.status returns
 211          *   0 if the rpc call fails,
 212          *   1 if quotas exist,
 213          *   2 if there is no quota set, and
 214          *   3 if no permission to get the quota.
 215          */
 216
 217         switch (gq_rslt.GQR_STATUS) {
 218         case 0:
 219                 DEBUG(3, ("sys_get_nfs_quotas: Remote Quotas Failed! "
 220                           "Error '%i'\n", gq_rslt.GQR_STATUS));
 221                 ret = -1;
 222                 goto out;
 223
 224         case 1:
 225                 DEBUG(10, ("sys_get_nfs_quotas: Good quota data\n"));
 226                 dp->bsize = (uint64_t)gq_rslt.GQR_RQUOTA.rq_bsize;
 227                 dp->softlimit = gq_rslt.GQR_RQUOTA.rq_bsoftlimit;
 228                 dp->hardlimit = gq_rslt.GQR_RQUOTA.rq_bhardlimit;
 229                 dp->curblocks = gq_rslt.GQR_RQUOTA.rq_curblocks;
 230                 break;
 231
 232         case 2:
 233                 DEBUG(5, ("sys_get_nfs_quotas: No quota set\n"));
 234                 SMB_QUOTAS_SET_NO_LIMIT(dp);
 235                 break;
 236
 237         case 3:
 238                 DEBUG(3, ("sys_get_nfs_quotas: no permission to get quota\n"));
 239                 errno = EPERM;
 240                 ret = -1;
 241                 goto out;
 242
 243         default:
 244                 DEBUG(5, ("sys_get_nfs_quotas: Unknown remote quota status "
 245                           "code '%i'\n", gq_rslt.GQR_STATUS));
 246                 ret = -1;
 247                 goto out;
 248                 break;
 249         }
 250
 251         dp->qflags = qflags;
 252
 253         ret = 0;
 254
 255 out:
 256         if (clnt) {
 257                 if (clnt->cl_auth) {
 258                         auth_destroy(clnt->cl_auth);
 259                 }
 260                 clnt_destroy(clnt);
 261         }
 262
 263         SAFE_FREE(cutstr);
 264
 265         DEBUG(10, ("sys_get_nfs_quotas: finished\n" ));
 266         return ret;
 267 }
 268
 269 int sys_set_nfs_quota(const char *path, const char *bdev,
 270                       enum SMB_QUOTA_TYPE qtype,
 271                       unid_t id, SMB_DISK_QUOTA *dp)
 272 {
 273         DEBUG(1, ("sys_set_nfs_quota : not supported\n"));
 274         errno = ENOSYS;
 275         return -1;
 276 }
 277
 278 #else /* HAVE_NFS_QUOTAS */
 279
 280 void dummy_sysquotas_nfs(void);
 281 void dummy_sysquotas_nfs(void) {}
 282
 283 #endif /* HAVE_NFS_QUOTAS */