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